RESUMEN
BACKGROUND: Sclerostin is an osteocyte-derived inhibitor of osteoblast activity. The monoclonal antibody romosozumab binds to sclerostin and increases bone formation. METHODS: In a phase 2, multicenter, international, randomized, placebo-controlled, parallel-group, eight-group study, we evaluated the efficacy and safety of romosozumab over a 12-month period in 419 postmenopausal women, 55 to 85 years of age, who had low bone mineral density (a T score of -2.0 or less at the lumbar spine, total hip, or femoral neck and -3.5 or more at each of the three sites). Participants were randomly assigned to receive subcutaneous romosozumab monthly (at a dose of 70 mg, 140 mg, or 210 mg) or every 3 months (140 mg or 210 mg), subcutaneous placebo, or an open-label active comparator--oral alendronate (70 mg weekly) or subcutaneous teriparatide (20 µg daily). The primary end point was the percentage change from baseline in bone mineral density at the lumbar spine at 12 months. Secondary end points included percentage changes in bone mineral density at other sites and in markers of bone turnover. RESULTS: All dose levels of romosozumab were associated with significant increases in bone mineral density at the lumbar spine, including an increase of 11.3% with the 210-mg monthly dose, as compared with a decrease of 0.1% with placebo and increases of 4.1% with alendronate and 7.1% with teriparatide. Romosozumab was also associated with large increases in bone mineral density at the total hip and femoral neck, as well as transitory increases in bone-formation markers and sustained decreases in a bone-resorption marker. Except for mild, generally nonrecurring injection-site reactions with romosozumab, adverse events were similar among groups. CONCLUSIONS: In postmenopausal women with low bone mass, romosozumab was associated with increased bone mineral density and bone formation and with decreased bone resorption. (Funded by Amgen and UCB Pharma; ClinicalTrials.gov number, NCT00896532.).
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Anticuerpos Monoclonales/administración & dosificación , Conservadores de la Densidad Ósea/administración & dosificación , Densidad Ósea/efectos de los fármacos , Remodelación Ósea/efectos de los fármacos , Osteoporosis Posmenopáusica/tratamiento farmacológico , Anciano , Anciano de 80 o más Años , Alendronato/farmacología , Alendronato/uso terapéutico , Anticuerpos Monoclonales/efectos adversos , Anticuerpos Monoclonales/farmacología , Biomarcadores/metabolismo , Conservadores de la Densidad Ósea/efectos adversos , Conservadores de la Densidad Ósea/farmacología , Calcio/sangre , Esquema de Medicación , Femenino , Humanos , Inyecciones Subcutáneas , Análisis de los Mínimos Cuadrados , Vértebras Lumbares/efectos de los fármacos , Persona de Mediana Edad , Teriparatido/farmacología , Teriparatido/uso terapéuticoRESUMEN
BACKGROUND: Denosumab treatment for up to 8 years in the FREEDOM study and Extension was associated with low fracture incidence. It was not clear whether subjects who discontinued during the study conduct had a higher risk of fracture than those who remained enrolled, thereby underestimating the true fracture risk for the entire trial cohort. Thus, we explored the influence of early withdrawals on nonvertebral fracture incidence during the Extension study. METHODS: To understand the potential effect of depletion of susceptible subjects on fracture incidence, we first evaluated subject characteristics in patients who were enrolled in the Extension vs those who were not. We subsequently employed a Kaplan-Meier multiple imputation (KMMI) approach to consider subjects who discontinued as if they remained enrolled with a 0%, 20%, 50%, and 100% increase in fracture risk compared with participants remaining on study. RESULTS: Extension enrollees were generally similar to nonparticipants in median age (71.9 and 73.1 years, respectively), mean total hip bone mineral density T-score (-1.9 and -2.0, respectively), and probability of fracture risk by Fracture Risk Assessment Tool (FRAX®) at FREEDOM baseline (16.9% and 17.7% for major osteoporotic fracture and 6.7% and 7.4% for hip fracture, respectively). When we assumed a doubled fracture risk (100% increase) after discontinuation in KMMI analyses, nonvertebral fracture rate estimates were only marginally higher than the observed rates for both the crossover group (10.32% vs 9.16%, respectively) and the long-term group (7.63% vs 6.63%, respectively). CONCLUSION: The observation of continued denosumab efficacy over 8 years of treatment was robust and does not seem to be explained by depletion of susceptible subjects. TRIAL REGISTRATION: ClincalTrials.gov registration number NCT00523341 ; registered August 30, 2007.
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Conservadores de la Densidad Ósea/uso terapéutico , Denosumab/uso terapéutico , Fracturas de Cadera/tratamiento farmacológico , Fracturas Osteoporóticas/tratamiento farmacológico , Pacientes Desistentes del Tratamiento , Anciano , Anciano de 80 o más Años , Femenino , Fracturas de Cadera/diagnóstico por imagen , Fracturas de Cadera/epidemiología , Humanos , Masculino , Persona de Mediana Edad , Fracturas Osteoporóticas/diagnóstico por imagen , Fracturas Osteoporóticas/epidemiología , Resultado del TratamientoRESUMEN
Context: Chronic hypoparathyroidism is conventionally treated with oral calcium and active vitamin D to reach and maintain targeted serum calcium and phosphorus levels, but some patients remain inadequately controlled. Objective: To assess long-term safety and efficacy of recombinant human parathyroid hormone (1-84) (rhPTH(1-84)) treatment. Methods: This was an open-label extension study at 12 US centers. Adults (n = 49) with chronic hypoparathyroidism were included. The intervention was rhPTH(1-84) for 6 years. The main outcome measures were safety, biochemical measures, oral supplement doses, bone indices. Results: Thirty-eight patients (77.6%) completed the study. Throughout 72 months, mean albumin-adjusted serum calcium was within 2.00 to 2.25â mmol/L (8.0-9.0â mg/dL). At baseline, 65% of patients with measurements (n = 24/37) were hypercalciuric; of these, 54% (n = 13/24) were normocalciuric at month 72. Mean serum phosphorus declined from 1.6 ± 0.19â mmol/L at baseline (n = 49) to 1.3 ± 0.20â mmol/L at month 72 (n = 36). Mean estimated glomerular filtration rate was stable. rhPTH(1-84)-related adverse events were reported in 51.0% of patients (n = 25/49); all but 1 event were mild/moderate in severity. Mean oral calcium supplementation reduced by 45% ± 113.6% and calcitriol by 74% ± 39.3%. Bone turnover markers declined by month 32 to a plateau above pretreatment values; only aminoterminal propeptide of type 1 collagen remained outside the reference range. Mean bone mineral density z score fell at one-third radius and was stable at other sites. Conclusion: 6 years of rhPTH(1-84) treatment was associated with sustained improvements in biochemical parameters, a reduction in the percentage of patients with hypercalciuria, stable renal function, and decreased supplement requirements. rhPTH(1-84) was well tolerated; no new safety signals were identified.
RESUMEN
We prospectively assessed, with predefined criteria, the location and rates of all femur fractures (hip, subtrochanteric/femoral shaft [ST/FS], including atypical [AFF] and distal fractures) in women at increased fracture risk during treatment with the cathepsin K inhibitor, odanacatib (ODN), or placebo over 5 years in the Long-Term ODN Fracture Trial (LOFT and LOFT Extension [NCT00529373, EudraCT 2007-002693-66]). ODN was an investigational antiresorptive agent previously in development as an osteoporosis treatment that, unlike bisphosphonates, reduces bone formation only transiently. Women aged ≥65 years with a bone mineral density (BMD) T-score ≤-2.5 at the total hip (TH) or femoral neck (FN) or with a radiographic vertebral fracture and T-scores ≤-1.5 at the TH or FN were randomized (1:1) to receive ODN 50 mg/week or placebo. All patients received vitamin D3 (5600 IU/week) and calcium (total 1200 mg/d); the analysis included 16,071 women. Rates of all adjudicated low-energy femoral fractures were 0.38 versus 0.58/100 patient-years for ODN and placebo, respectively (hazard ratio [HR] = 0.65; 95% confidence interval [CI] 0.51-0.82; nominal p < .001), and for low-energy hip fractures were 0.29 versus 0.56/100 patient-years, respectively (HR = 0.52; 95% CI 0.40-0.67; p < .001). The cumulative incidence of combined hip and ST/FS or hip fractures alone in the ODN group was consistently lower than in the placebo group (1.93% versus 3.11% for combined fractures and 1.53% versus 3.03% for hip fractures at 5 years, respectively). However, low-energy ST/FS fractures were more frequent in ODN-treated women than in placebo-treated women (24 versus 6, respectively). Among these, 12 fractures were adjudicated as AFF in 10 patients treated with ODN (0.03/100 patient-years) compared with none in the 6 placebo-treated women (estimated difference 0.03; 95% CI 0.02-0.06). These results provide insight into possible pathogeneses of AFF, suggesting that the current criteria for diagnosing these fractures may need to be reconsidered. © 2021 American Society for Bone and Mineral Research (ASBMR)..
Asunto(s)
Conservadores de la Densidad Ósea , Fracturas de Cadera , Osteoporosis Posmenopáusica , Osteoporosis , Anciano , Compuestos de Bifenilo , Densidad Ósea , Conservadores de la Densidad Ósea/uso terapéutico , Método Doble Ciego , Femenino , Cuello Femoral , Fracturas de Cadera/tratamiento farmacológico , Fracturas de Cadera/epidemiología , Humanos , Incidencia , Osteoporosis Posmenopáusica/complicaciones , Osteoporosis Posmenopáusica/tratamiento farmacológico , Osteoporosis Posmenopáusica/epidemiología , PosmenopausiaRESUMEN
OBJECTIVE: Fractures due to osteoporosis represent a serious burden on patients and healthcare systems. The objective of this review is to provide an overview of the anabolic agent abaloparatide (ABL) for the treatment of postmenopausal women with osteoporosis at high risk for fracture. METHODS: A literature review was conducted using PubMed to identify articles focused on ABL published prior to February 10, 2020, using the search term "abaloparatide". RESULTS: ABL, a synthetic analog of human parathyroid hormone-related protein, increased bone mineral density (BMD), improved bone microarchitecture, and increased bone strength in preclinical and clinical studies. The pivotal phase 3 trial ACTIVE and its extension (ACTIVExtend) demonstrated the efficacy of initial treatment with ABL for 18 months followed by sequential treatment with alendronate (ALN) for an additional 24 months to reduce the risk of vertebral, nonvertebral, clinical, and major osteoporotic fractures and to increase BMD in postmenopausal women with osteoporosis. Discontinuations from ACTIVE were slightly more common in ABL-treated patients due to dizziness, palpitations, nausea, and headache. Post hoc analyses of ACTIVE and ACTIVExtend support the efficacy and safety of ABL in relevant subpopulations including postmenopausal women with various baseline risk factors, women ≥80 years, women with type 2 diabetes mellitus, and women with renal impairment. CONCLUSIONS: ABL is an effective and well-tolerated treatment for women with postmenopausal osteoporosis at high risk for fracture. Its therapeutic effects are sustained with subsequent ALN therapy.
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Conservadores de la Densidad Ósea/uso terapéutico , Osteoporosis Posmenopáusica/tratamiento farmacológico , Fracturas Osteoporóticas/prevención & control , Proteína Relacionada con la Hormona Paratiroidea/farmacología , Proteína Relacionada con la Hormona Paratiroidea/uso terapéutico , Alendronato/uso terapéutico , Animales , Densidad Ósea/efectos de los fármacos , Ensayos Clínicos como Asunto , Diabetes Mellitus Tipo 2/complicaciones , Femenino , Humanos , Posmenopausia , Factores de RiesgoRESUMEN
Denosumab increased lumbar spine bone mineral density (BMD) versus placebo in a 2-year, randomized, placebo-controlled, phase 3 study of patients with hormone-receptor-positive, non-metastatic breast cancer and low bone mass who were receiving adjuvant aromatase inhibitor therapy. In subgroup analyses at 12 and 24 months, we evaluated factors (duration and type of aromatase inhibitor, tamoxifen use, age, time since menopause, body mass index, T-score) that might influence BMD at the lumbar spine, total hip, femoral neck, and 1/3 radius. Patients were randomized to receive placebo (n = 125) or 60 mg denosumab (n = 127) subcutaneously every 6 months. In all subgroups, 12 or 24 months' treatment with denosumab was associated with larger BMD gains than placebo across multiple skeletal sites. Most increases were statistically significant (P < 0.05). Twice-yearly administration of denosumab, regardless of patient subgroup or skeletal site, resulted in consistent increases in BMD versus placebo at 12 and 24 months.
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Anticuerpos Monoclonales/uso terapéutico , Inhibidores de la Aromatasa/efectos adversos , Densidad Ósea/efectos de los fármacos , Neoplasias de la Mama/tratamiento farmacológico , Quimioterapia Adyuvante , Estrógenos , Neoplasias Hormono-Dependientes/tratamiento farmacológico , Osteoporosis Posmenopáusica/tratamiento farmacológico , Ligando RANK/uso terapéutico , Absorciometría de Fotón , Anciano , Anticuerpos Monoclonales/administración & dosificación , Anticuerpos Monoclonales Humanizados , Antineoplásicos Hormonales/efectos adversos , Antineoplásicos Hormonales/uso terapéutico , Inhibidores de la Aromatasa/uso terapéutico , Neoplasias de la Mama/complicaciones , Terapia Combinada , Denosumab , Esquema de Medicación , Femenino , Cuello Femoral/diagnóstico por imagen , Cuello Femoral/efectos de los fármacos , Humanos , Vértebras Lumbares/diagnóstico por imagen , Vértebras Lumbares/efectos de los fármacos , Persona de Mediana Edad , Neoplasias Hormono-Dependientes/complicaciones , Osteoporosis Posmenopáusica/inducido químicamente , Ligando RANK/administración & dosificación , Ligando RANK/antagonistas & inhibidores , Ligando RANK/inmunología , Tamoxifeno/efectos adversos , Tamoxifeno/uso terapéuticoRESUMEN
CONTEXT: Conventional hypoparathyroidism treatment with oral calcium and active vitamin D is aimed at correcting hypocalcemia but does not address other physiologic defects caused by PTH deficiency. OBJECTIVE: To evaluate long-term safety and tolerability of recombinant human PTH (1-84) [rhPTH(1-84)]. DESIGN: Open-label extension study; 5-year interim analysis. SETTING: 12 US centers. PATIENTS: Adults (N = 49) with chronic hypoparathyroidism. INTERVENTION(S): rhPTH(1-84) 25 or 50 µg/d initially, with 25-µg adjustments permitted to a 100 µg/d maximum. MAIN OUTCOME MEASURE(S): Safety parameters; composite efficacy outcome was the proportion of patients with ≥50% reduction in oral calcium (or ≤500 mg/d) and calcitriol (or ≤0.25 µg/d) doses, and albumin-corrected serum calcium normalized or maintained compared with baseline, not exceeding upper limit of normal. RESULTS: Forty patients completed 60 months of treatment. Mean albumin-corrected serum calcium levels remained between 8.2 and 8.7 mg/dL. Between baseline and month 60, levels ± SD of urinary calcium, serum phosphorus, and calcium-phosphorus product decreased by 101.2 ± 236.24 mg/24 hours, 1.0 ± 0.78 mg/dL, and 8.5 ± 8.29 mg2/dL2, respectively. Serum creatinine level and estimated glomerular filtration rate were unchanged. Treatment-emergent adverse events (AEs) were reported in 48 patients (98.0%; hypocalcemia, 36.7%; muscle spasms, 32.7%; paresthesia, 30.6%; sinusitis, 30.6%; nausea, 30.6%) and serious AEs in 13 (26.5%). At month 60, 28 patients (70.0%) achieved the composite efficacy outcome. Bone turnover markers increased, peaked at â¼12 months, and then declined to values that remained above baseline. CONCLUSION: Treatment with rhPTH(1-84) for 5 years demonstrated a safety profile consistent with previous studies and improved key biochemical parameters.
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Terapia de Reemplazo de Hormonas/efectos adversos , Terapia de Reemplazo de Hormonas/métodos , Hipoparatiroidismo/tratamiento farmacológico , Hormona Paratiroidea/efectos adversos , Hormona Paratiroidea/uso terapéutico , Adulto , Anciano , Calcitriol/uso terapéutico , Calcio/sangre , Calcio/uso terapéutico , Calcio de la Dieta/uso terapéutico , Femenino , Humanos , Masculino , Persona de Mediana Edad , Proteínas Recombinantes , Resultado del TratamientoRESUMEN
BACKGROUND: Odanacatib, a cathepsin K inhibitor, reduces bone resorption while maintaining bone formation. Previous work has shown that odanacatib increases bone mineral density in postmenopausal women with low bone mass. We aimed to investigate the efficacy and safety of odanacatib to reduce fracture risk in postmenopausal women with osteoporosis. METHODS: The Long-term Odanacatib Fracture Trial (LOFT) was a multicentre, randomised, double-blind, placebo-controlled, event-driven study at 388 outpatient clinics in 40 countries. Eligible participants were women aged at least 65 years who were postmenopausal for 5 years or more, with a femoral neck or total hip bone mineral density T-score between -2·5 and -4·0 if no previous radiographic vertebral fracture, or between -1·5 and -4·0 with a previous vertebral fracture. Women with a previous hip fracture, more than one vertebral fracture, or a T-score of less than -4·0 at the total hip or femoral neck were not eligible unless they were unable or unwilling to use approved osteoporosis treatment. Participants were randomly assigned (1:1) to either oral odanacatib (50 mg once per week) or matching placebo. Randomisation was done using an interactive voice recognition system after stratification for previous radiographic vertebral fracture, and treatment was masked to study participants, investigators and their staff, and sponsor personnel. If the study completed before 5 years of double-blind treatment, consenting participants could enrol in a double-blind extension study (LOFT Extension), continuing their original treatment assignment for up to 5 years from randomisation. Primary endpoints were incidence of vertebral fractures as assessed using radiographs collected at baseline, 6 and 12 months, yearly, and at final study visit in participants for whom evaluable radiograph images were available at baseline and at least one other timepoint, and hip and non-vertebral fractures adjudicated as being a result of osteoporosis as assessed by clinical history and radiograph. Safety was assessed in participants who received at least one dose of study drug. The adjudicated cardiovascular safety endpoints were a composite of cardiovascular death, myocardial infarction, or stroke, and new-onset atrial fibrillation or flutter. Individual cardiovascular endpoints and death were also assessed. LOFT and LOFT Extension are registered with ClinicalTrials.gov (number NCT00529373) and the European Clinical Trials Database (EudraCT number 2007-002693-66). FINDINGS: Between Sept 14, 2007, and Nov 17, 2009, we randomly assigned 16â071 evaluable patients to treatment: 8043 to odanacatib and 8028 to placebo. After a median follow-up of 36·5 months (IQR 34·43-40·15) 4297 women assigned to odanacatib and 3960 assigned to placebo enrolled in LOFT Extension (total median follow-up 47·6 months, IQR 35·45-60·06). In LOFT, cumulative incidence of primary outcomes for odanacatib versus placebo were: radiographic vertebral fractures 3·7% (251/6770) versus 7·8% (542/6910), hazard ratio (HR) 0·46, 95% CI 0·40-0·53; hip fractures 0·8% (65/8043) versus 1·6% (125/8028), 0·53, 0·39-0·71; non-vertebral fractures 5·1% (412/8043) versus 6·7% (541/8028), 0·77, 0·68-0·87; all p<0·0001. Combined results from LOFT plus LOFT Extension for cumulative incidence of primary outcomes for odanacatib versus placebo were: radiographic vertebral fractures 4·9% (341/6909) versus 9·6% (675/7011), HR 0·48, 95% CI 0·42-0·55; hip fractures 1·1% (86/8043) versus 2·0% (162/8028), 0·52, 0·40-0·67; non-vertebral fractures 6·4% (512/8043) versus 8·4% (675/8028), 0·74, 0·66-0·83; all p<0·0001. In LOFT, the composite cardiovascular endpoint of cardiovascular death, myocardial infarction, or stroke occurred in 273 (3·4%) of 8043 patients in the odanacatib group versus 245 (3·1%) of 8028 in the placebo group (HR 1·12, 95% CI 0·95-1·34; p=0·18). New-onset atrial fibrillation or flutter occurred in 112 (1·4%) of 8043 patients in the odanacatib group versus 96 (1·2%) of 8028 in the placebo group (HR 1·18, 0·90-1·55; p=0·24). Odanacatib was associated with an increased risk of stroke (1·7% [136/8043] vs 1·3% [104/8028], HR 1·32, 1·02-1·70; p=0·034), but not myocardial infarction (0·7% [60/8043] vs 0·9% [74/8028], HR 0·82, 0·58-1·15; p=0·26). The HR for all-cause mortality was 1·13 (5·0% [401/8043] vs 4·4% [356/8028], 0·98-1·30; p=0·10). When data from LOFT Extension were included, the composite of cardiovascular death, myocardial infarction, or stroke occurred in significantly more patients in the odanacatib group than in the placebo group (401 [5·0%] of 8043 vs 343 [4·3%] of 8028, HR 1·17, 1·02-1·36; p=0·029, as did stroke (2·3% [187/8043] vs 1·7% [137/8028], HR 1·37, 1·10-1·71; p=0·0051). INTERPRETATION: Odanacatib reduced the risk of fracture, but was associated with an increased risk of cardiovascular events, specifically stroke, in postmenopausal women with osteoporosis. Based on the overall balance between benefit and risk, the study's sponsor decided that they would no longer pursue development of odanacatib for treatment of osteoporosis. FUNDING: Merck Sharp & Dohme Corp, a subsidiary of Merck & Co, Inc, Kenilworth, NJ, USA.
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Compuestos de Bifenilo/uso terapéutico , Conservadores de la Densidad Ósea/uso terapéutico , Osteoporosis Posmenopáusica/tratamiento farmacológico , Anciano , Anciano de 80 o más Años , Compuestos de Bifenilo/efectos adversos , Densidad Ósea/efectos de los fármacos , Conservadores de la Densidad Ósea/efectos adversos , Método Doble Ciego , Femenino , Fracturas Óseas/epidemiología , Fracturas Óseas/prevención & control , Fracturas de Cadera/epidemiología , Fracturas de Cadera/prevención & control , Humanos , Osteoporosis Posmenopáusica/complicaciones , Fracturas Osteoporóticas/prevención & control , Fracturas de la Columna Vertebral/epidemiología , Fracturas de la Columna Vertebral/prevención & control , Resultado del TratamientoRESUMEN
CONTEXT: Denosumab is an investigational fully human monoclonal antibody against receptor activator of nuclear factor-kappaB ligand, a mediator of osteoclastogenesis and osteoclast survival. OBJECTIVE: This study evaluated the ability of denosumab to increase bone mineral density (BMD) and decrease bone turnover markers (BTMs) in early and later postmenopausal women with low BMD. DESIGN AND SETTING: This 2-yr randomized, double-blind, placebo-controlled study was conducted in North America. PARTICIPANTS: Subjects included 332 postmenopausal women with lumbar spine BMD T-scores between -1.0 and -2.5. INTERVENTIONS: SUBJECTS were randomly assigned to receive denosumab sc, 60 mg every 6 months, or placebo. Randomization was stratified by time since onset of menopause (< or =5 yr or > 5 yr). MAIN OUTCOME MEASURES: The primary end point was the percent change in lumbar spine BMD by dual-energy x-ray absorptiometry at 24 months. Additional end points were percent change in volumetric BMD of the distal radius by quantitative computed tomography; percent change in BMD by dual-energy x-ray absorptiometry for the total hip, one-third radius, and total body; hip structural analysis; percent change in BTMs; and safety. RESULTS: Denosumab significantly increased lumbar spine BMD, compared with placebo at 24 months (6.5 vs. -0.6%; P<0.0001) with similar results for both strata. Denosumab also produced significant increases in BMD at the total hip, one-third radius, and total body (P < 0.0001 vs. placebo); increased distal radius volumetric BMD (P < 0.01); improved hip structural analysis parameters; and significantly suppressed serum C-telopeptide, tartrate-resistant acid phosphatase-5b, and intact N-terminal propeptide of type 1 procollagen. The overall incidence of adverse events was similar between both study groups. CONCLUSIONS: Twice-yearly denosumab increased BMD and decreased BTMs in early and later postmenopausal women.
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Anticuerpos Monoclonales/uso terapéutico , Densidad Ósea/efectos de los fármacos , Remodelación Ósea/efectos de los fármacos , Osteoporosis Posmenopáusica/tratamiento farmacológico , Posmenopausia/efectos de los fármacos , Ligando RANK/uso terapéutico , Algoritmos , Anticuerpos Monoclonales/efectos adversos , Anticuerpos Monoclonales/farmacología , Anticuerpos Monoclonales Humanizados , Conservadores de la Densidad Ósea/efectos adversos , Conservadores de la Densidad Ósea/uso terapéutico , Denosumab , Método Doble Ciego , Drogas en Investigación/efectos adversos , Drogas en Investigación/uso terapéutico , Femenino , Cadera/anatomía & histología , Humanos , Placebos , Ligando RANK/efectos adversos , Ligando RANK/farmacología , Resultado del TratamientoRESUMEN
BACKGROUND: Gastrointestinal (GI) symptoms and high dosing frequency have been cited as reasons for inadequate adherence to daily or weekly oral bisphosphonate therapy. Inadequate adherence may lead to poor therapeutic outcomes. OBJECTIVE: The PRIOR study evaluated adherence to and GI tolerability of monthly therapy with oral and quarterly intravenous ibandronate in postmenopausal women with osteoporosis or osteopenia. METHODS: This 12-month, multicenter, prospective, nonrandomized, open-label, noninferiority study included postmenopausal women with osteoporosis or osteopenia who had discontinued previous daily or weekly oral bisphosphonate therapy because of GI intolerance. Participants chose to receive either monthly oral ibandronate 150 mg or quarterly intravenous ibandronate 3 mg and were permitted to switch formulations once during the study. For oral treatment, adherence was assessed based on doses taken, as recorded on the case-report form; for intravenous treatment, adherence was assessed based on doses administered, as recorded by study site personnel. Participants who took >or=75% of protocol-specified doses were considered adherent. The rate of adherence to oral ibandronate was protocol defined as noninferior to that of intravenous ibandronate if the upper limit of the 2-sided 90% CI for the adjusted difference in adherence rates was >20%. At screening, participants assessed the tolerability of their previous bisphosphonate therapy using the GI Experience Survey; using the same instrument, they assessed the tolerability of ibandronate 1 month from baseline and at months 4, 7, and 10. RESULTS: Of 543 participants in the intent-to-treat population, 147 (27.1%) chose to receive oral treatment and 396 (72.9%) chose to receive intravenous treatment. The mean age of participants was approximately 66 years in both groups, and >90% of participants were white. A significantly greater proportion of participants who selected intravenous versus oral treatment had a primary diagnosis of osteoporosis (72.2% vs 57.1%, respectively; P<0.001) and a history of fracture as an adult (35.6% vs 22.4%; P >or= 0.004); significantly fewer recipients of intravenous versus oral ibandronate were currently working (29.0% vs 39.5%; P >or= 0.021). Overall, 82.9% of participants had previously received alendronate and 44.9% had previously received risedronate. Eleven participants switched from oral to intravenous therapy and 16 switched from intravenous to oral therapy during the study. In the perprotocol population, 69.7% of participants in the oral group (101/145) and 82.9% of participants in the intravenous group (325/392) were adherent to their originally selected therapy. Adherence to oral therapy fell within the prespecified boundary for noninferiority to intravenous therapy (adjusted difference: 12.4%; 90% CI, 5.1-19.7). Mean GI tolerance scores were significantly improved from screening at all subsequent assessment times in both treatment groups (P < 0.001); >75% of participants had a >or=10% increase in GI tolerability scores from screening. Both dosing regimens were generally well tolerated. CONCLUSION: Self-selected monthly oral or quarterly intravenous ibandronate therapy was associated with high adherence rates among these postmenopausal women with osteoporosis or osteopenia who had previously discontinued oral bisphosphonate treatment because of GI intolerance.
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Conservadores de la Densidad Ósea/administración & dosificación , Difosfonatos/efectos adversos , Tolerancia a Medicamentos , Enfermedades Gastrointestinales/inducido químicamente , Tracto Gastrointestinal/efectos de los fármacos , Osteoporosis/tratamiento farmacológico , Administración Oral , Adulto , Anciano , Anciano de 80 o más Años , Densidad Ósea/efectos de los fármacos , Conservadores de la Densidad Ósea/efectos adversos , Resorción Ósea , Difosfonatos/administración & dosificación , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Femenino , Estudios de Seguimiento , Humanos , Ácido Ibandrónico , Inyecciones Intravenosas , Persona de Mediana Edad , Osteoporosis/metabolismo , Estudios Prospectivos , Factores de Tiempo , Resultado del TratamientoRESUMEN
BACKGROUND: This analysis was conducted to assess the baseline data and design methodology within an observational longitudinal comparison of use vs. nonuse of the injectable (intramuscular) contraceptive depot medroxyprogesterone acetate (DMPA-IM) and its effect on bone mass in adolescent women. STUDY DESIGN: A prospective, observational, open-label, unmatched-cohort, safety study in females aged 11-18 years. Participants either self-selected DMPA-IM (Depo-Provera) 150 mg to be administered every 12 weeks for up to 240 weeks with a 120-week post-treatment follow-up or were nonusers (users of nonhormonal contraception or sexually abstinent) who were to be followed up for up to 360 weeks. As each participant entered the study, bone mineral density (BMD) was measured by dual-energy X-ray absorptiometry at the lumbar spine, hip and femoral neck regions, along with total body bone mineral content; serum and urine specimens were obtained for assay of bone metabolism markers and participants' histories of parity and tobacco and alcohol use were obtained. RESULTS: A total of 389 participants were enrolled: 169 elected to begin DMPA-IM; 26 chose nonhormonal methods and 194 were abstinent. The baseline characteristics indicated significant disparities between DMPA-IM users and nonusers: compared with the nonusers, DMPA-IM users had more advanced chronologic and gynecologic ages, were more likely to have smoked, been pregnant and included more blacks. These factors would likely influence bone accretion rates independent of DMPA-IM exposure. Comparison of participant BMDs with standard reference data revealed that the study cohorts did not match reference populations closely enough to make a direct between-cohort comparative analysis feasible. CONCLUSIONS: The baseline differences in cohort characteristics preclude a meaningful comparison of mean BMD changes over time between DMPA-IM users and nonusers cohorts, and comparisons of changes in Z-scores between cohorts were also not appropriate. Therefore, within-participant BMD decreases from baseline were established as safety thresholds, and the proportion of individuals crossing those thresholds on a persistent or progressive basis was identified as the revised primary end point.
Asunto(s)
Densidad Ósea/efectos de los fármacos , Anticonceptivos Femeninos/farmacología , Acetato de Medroxiprogesterona/farmacología , Adolescente , Niño , Femenino , Humanos , Estudios ProspectivosRESUMEN
BACKGROUND: Recombinant human parathyroid hormone (1-84) (PTH) increases bone mass and strength and improves bone quality by stimulating new bone formation. OBJECTIVE: To determine the safety of PTH and its effect on the incidence of vertebral fractures in postmenopausal women with osteoporosis. DESIGN: 18-month, randomized, double-blind, placebo-controlled, parallel-group study. SETTING: 168 centers in 9 countries. PATIENTS: 2532 postmenopausal women with low bone mineral density at the hip or lumbar spine. INTERVENTIONS: Women received 100 mug of recombinant human PTH or placebo daily by subcutaneous injection. All received calcium, 700 mg/d, and vitamin D3, 400 U/d. MEASUREMENTS: New or worsened vertebral fractures (primary outcome) and changes in bone mineral density and safety (secondary outcomes). RESULTS: 67.2% of patients who received at least 1 dose of the study drug completed the study. Parathyroid hormone reduced the risk for new or worsened vertebral fractures, but in sensitivity analyses, the magnitude of the reduction was changed with assumptions about fracture incidence in patients who did not complete the study (relative risk assuming no fractures, 0.42 [95% CI, 0.24 to 0.72] [P = 0.001]; relative risk assuming fracture incidence observed in all patients who completed the trial, 0.60 [CI, 0.36 to 1.00] [P = 0.05]; relative risk assuming fracture incidence observed in the placebo group, 0.62 [CI, 0.37 to 1.04] [P = 0.07]). Compared with placebo, mean bone mineral density increased at the spine by 6.9% (CI, 6.4% to 7.4%) and at the hip by 2.1% (CI, 1.7% to 2.5%) but decreased at the forearm in the PTH-treated group. Parathyroid hormone treatment increased the percentage of participants with hypercalciuria, hypercalcemia, and nausea by 24% (CI, 20% to 27%), 23% (CI, 21% to 26%), and 14% (CI, 11% to 16%), respectively, compared with placebo. LIMITATIONS: Baseline serum PTH and vitamin D levels were not measured. Many patients discontinued the trial prematurely. CONCLUSIONS: Parathyroid hormone (1-84) reduced the overall risk for new or worsened vertebral fracture in postmenopausal women with osteoporosis. Hypercalciuria, hypercalcemia, and nausea were more common in women who took the drug. Although the magnitude of the reduction was sensitive to assumptions about fracture incidence in patients who did not complete the study, the findings suggest that PTH provides an alternative therapeutic option for fracture prevention.
Asunto(s)
Densidad Ósea/efectos de los fármacos , Osteoporosis Posmenopáusica/tratamiento farmacológico , Hormona Paratiroidea/uso terapéutico , Fracturas de la Columna Vertebral/prevención & control , Fosfatasa Alcalina/sangre , Biomarcadores/sangre , Método Doble Ciego , Femenino , Humanos , Hipercalcemia/inducido químicamente , Hipercalciuria/inducido químicamente , Incidencia , Vértebras Lumbares/lesiones , Persona de Mediana Edad , Náusea/inducido químicamente , Osteoporosis Posmenopáusica/fisiopatología , Hormona Paratiroidea/efectos adversos , Estudios Prospectivos , Proteínas Recombinantes/efectos adversos , Proteínas Recombinantes/uso terapéutico , Riesgo , Sensibilidad y Especificidad , Fracturas de la Columna Vertebral/epidemiologíaRESUMEN
Over 12 months, romosozumab increased bone formation and decreased bone resorption, resulting in increased bone mineral density (BMD) in postmenopausal women with low BMD (NCT00896532). Herein, we report the study extension evaluating 24 months of treatment with romosozumab, discontinuation of romosozumab, alendronate followed by romosozumab, and romosozumab followed by denosumab. Postmenopausal women aged 55 to 85 years with a lumbar spine (LS), total hip (TH), or femoral neck T-score ≤-2.0 and ≥-3.5 were enrolled and randomly assigned to placebo, one of five romosozumab regimens (70 mg, 140 mg, 210 mg monthly [QM]; 140 mg Q3M; 210 mg Q3M) for 24 months, or open-label alendronate for 12 months followed by romosozumab 140 mg QM for 12 months. Eligible participants were then rerandomized 1:1 within original treatment groups to placebo or denosumab 60 mg Q6M for an additional 12 months. Percentage change from baseline in BMD and bone turnover markers (BTMs) at months 24 and 36 and safety were evaluated. Of 364 participants initially randomized to romosozumab, placebo, or alendronate, 315 completed 24 months of treatment and 248 completed the extension. Romosozumab markedly increased LS and TH BMD through month 24, with largest gains observed with romosozumab 210 mg QM (LS = 15.1%; TH = 5.4%). Women receiving romosozumab who transitioned to denosumab continued to accrue BMD, whereas BMD returned toward pretreatment levels with placebo. With romosozumab 210 mg QM, bone formation marker P1NP initially increased after treatment initiation and gradually decreased to below baseline by month 12, remaining below baseline through month 24; bone resorption marker ß-CTX rapidly decreased after treatment, remaining below baseline through month 24. Transition to denosumab further decreased both BTMs, whereas after transition to placebo, P1NP returned to baseline and ß-CTX increased above baseline. Adverse events were balanced between treatment groups through month 36. These data suggest that treatment effects of romosozumab are reversible upon discontinuation and further augmented by denosumab. © 2018 The Authors Journal of Bone and Mineral Research published by Wiley Periodicals, Inc.
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Anticuerpos Monoclonales/farmacología , Densidad Ósea/efectos de los fármacos , Denosumab/farmacología , Posmenopausia/fisiología , Anciano , Anticuerpos Monoclonales/administración & dosificación , Anticuerpos Monoclonales/efectos adversos , Biomarcadores/metabolismo , Remodelación Ósea/efectos de los fármacos , Huesos/efectos de los fármacos , Denosumab/administración & dosificación , Denosumab/efectos adversos , Método Doble Ciego , Esquema de Medicación , Femenino , Humanos , Persona de Mediana Edad , Placebos , Posmenopausia/efectos de los fármacos , Factores de Tiempo , Resultado del TratamientoRESUMEN
Purpose: In women with postmenopausal osteoporosis, we investigated the effects of 24 months of treatment with alendronate (ALN) following 18 months of treatment with abaloparatide (ABL) or placebo (PBO). Methods: Women who completed ABL or PBO treatment in ACTIVE were eligible to receive up to 24 months of ALN. We evaluated the incidence of vertebral and nonvertebral fractures and changes in bone mineral density (BMD) during the entire 43-month period from ACTIVE baseline to the end of ACTIVExtend and for the 24-month extension only. Results: Five hundred fifty-eight women from ACTIVE's ABL group and 581 from its PBO group (92% of ABL and PBO completers) were enrolled. During the full 43-month treatment period, 0.9% of evaluable women in the ABL/ALN group experienced a new radiographic vertebral fracture vs 5.6% of women in the PBO/ALN group, an 84% relative risk reduction (RRR, P < 0.001). Kaplan-Meier incidence rates for other reported fracture types were significantly lower for ABL/ALN vs PBO/ALN (all P < 0.05). Gains in BMD achieved during ACTIVE were further increased during ACTIVExtend. For ACTIVExtend only, RRR for vertebral fractures was 87% with ABL/ALN vs PBO/ALN (P = 0.001). Adverse events were similar between groups. A supplemental analysis for regulatory authorities found no hip fractures in the ABL/ALN group vs five in the PBO/ALN group. Conclusions: Eighteen months of ABL followed by 24 months of ALN reduced the risk of vertebral, nonvertebral, clinical, and major osteoporotic fractures and increased BMD. Sequential ABL followed by ALN appears to be an effective treatment option for postmenopausal women at risk for osteoporosis-related fractures.
Asunto(s)
Alendronato/administración & dosificación , Conservadores de la Densidad Ósea/administración & dosificación , Osteoporosis Posmenopáusica/tratamiento farmacológico , Proteína Relacionada con la Hormona Paratiroidea/administración & dosificación , Anciano , Anciano de 80 o más Años , Densidad Ósea/efectos de los fármacos , Esquema de Medicación , Sustitución de Medicamentos , Femenino , Cuello Femoral/efectos de los fármacos , Humanos , Quimioterapia de Mantención , Persona de Mediana Edad , Osteoporosis Posmenopáusica/complicaciones , Osteoporosis Posmenopáusica/epidemiología , Fracturas Osteoporóticas/tratamiento farmacológico , Fracturas Osteoporóticas/epidemiología , Fracturas Osteoporóticas/etiología , Placebos , Fracturas de la Columna Vertebral/tratamiento farmacológico , Fracturas de la Columna Vertebral/epidemiología , Fracturas de la Columna Vertebral/etiologíaRESUMEN
CONTEXT: In preclinical models, inhibitors of 3-hydroxy-3-methylglutaryl-coenzyme A reductase have been shown to positively affect bone remodeling balance. Observational studies and secondary analyses from lipid-lowering trials have yielded inconsistent results regarding the effect of these agents on bone mineral density and fracture risk. OBJECTIVE: Our objective was to determine whether clinically significant skeletal benefits result from hydroxymethylglutaryl-coenzyme A reductase inhibition in postmenopausal women. DESIGN AND SETTING: We conducted a prospective, randomized, double-blind, placebo-controlled, dose-ranging comparative clinical trial at 62 sites in the United States. PARTICIPANTS: Participants included 626 postmenopausal women with low-density lipoprotein cholesterol levels of at least 130 mg/dl (3.4 mmol/liter) and less than 190 mg/dl (4.9 mmol/liter), and lumbar (L1-L4) spine bone mineral density T-score between 0.0 and -2.5. INTERVENTION: Once-daily placebo or 10, 20, 40, or 80 mg atorvastatin was administered. MAIN OUTCOME MEASURES: We assessed percent change from baseline in lumbar (L1-L4) spine bone mineral density with each dose of atorvastatin compared with placebo. RESULTS: At 52 wk, there was no significant difference between each atorvastatin and placebo group or change from baseline at any tested dose of atorvastatin or placebo in lumbar (L1-L4) spine bone mineral density. Nor did atorvastatin produce a significant change in bone mineral density at any other site. Changes in biochemical markers of bone turnover did not differ significantly between each atorvastatin and placebo group. All doses of atorvastatin were generally well tolerated, with similar incidences of adverse events across all dose groups and placebo. CONCLUSIONS: Clinically relevant doses of atorvastatin that lower lipid levels had no effect on bone mineral density or biochemical indices of bone metabolism in this study, suggesting that such oral agents are not useful in the prevention or treatment of osteoporosis.
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Huesos/patología , Dislipidemias/tratamiento farmacológico , Dislipidemias/patología , Ácidos Heptanoicos/uso terapéutico , Inhibidores de Hidroximetilglutaril-CoA Reductasas/uso terapéutico , Posmenopausia/fisiología , Pirroles/uso terapéutico , Absorciometría de Fotón , Adulto , Anciano , Atorvastatina , Biomarcadores , Densidad Ósea/efectos de los fármacos , Huesos/efectos de los fármacos , Huesos/metabolismo , LDL-Colesterol/sangre , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Femenino , Ácidos Heptanoicos/administración & dosificación , Ácidos Heptanoicos/efectos adversos , Humanos , Inhibidores de Hidroximetilglutaril-CoA Reductasas/administración & dosificación , Inhibidores de Hidroximetilglutaril-CoA Reductasas/efectos adversos , Hipercolesterolemia/sangre , Hipercolesterolemia/tratamiento farmacológico , Lípidos/sangre , Persona de Mediana Edad , Pirroles/administración & dosificación , Pirroles/efectos adversos , Columna Vertebral/efectos de los fármacos , Columna Vertebral/metabolismoRESUMEN
BACKGROUND: Antiresorptive agents are widely used to treat osteoporosis. We report the results of a multinational randomized, double-blind study, in which postmenopausal women with osteoporosis were treated with alendronate for up to 10 years. METHODS: The initial three-year phase of the study compared three daily doses of alendronate with placebo. Women in the original placebo group received alendronate in years 4 and 5 and then were discharged. Women in the original active-treatment groups continued to receive alendronate during the initial extension (years 4 and 5). In two further extensions (years 6 and 7, and 8 through 10), women who had received 5 mg or 10 mg of alendronate daily continued on the same treatment. Women in the discontinuation group received 20 mg of alendronate daily for two years and 5 mg daily in years 3, 4, and 5, followed by five years of placebo. Randomized group assignments and blinding were maintained throughout the 10 years. We report results for the 247 women who participated in all four phases of the study. RESULTS: Treatment with 10 mg of alendronate daily for 10 years produced mean increases in bone mineral density of 13.7 percent at the lumbar spine (95 percent confidence interval, 12.0 to 15.5 percent), 10.3 percent at the trochanter (95 percent confidence interval, 8.1 to 12.4 percent), 5.4 percent at the femoral neck (95 percent confidence interval, 3.5 to 7.4 percent), and 6.7 percent at the total proximal femur (95 percent confidence interval, 4.4 to 9.1 percent) as compared with base-line values; smaller gains occurred in the group given 5 mg daily. The discontinuation of alendronate resulted in a gradual loss of effect, as measured by bone density and biochemical markers of bone remodeling. Safety data, including fractures and stature, did not suggest that prolonged treatment resulted in any loss of benefit. CONCLUSIONS: The therapeutic effects of alendronate were sustained, and the drug was well tolerated over a 10-year period. The discontinuation of alendronate resulted in the gradual loss of its effects.
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Alendronato/uso terapéutico , Densidad Ósea/efectos de los fármacos , Osteoporosis Posmenopáusica/tratamiento farmacológico , Anciano , Alendronato/efectos adversos , Alendronato/farmacología , Estatura/efectos de los fármacos , Remodelación Ósea/efectos de los fármacos , Método Doble Ciego , Femenino , Fracturas Óseas/epidemiología , Fracturas Óseas/prevención & control , Humanos , Persona de Mediana Edad , Radiografía , Fracturas de la Columna Vertebral/diagnóstico por imagen , Fracturas de la Columna Vertebral/epidemiología , Fracturas de la Columna Vertebral/prevención & control , Factores de TiempoRESUMEN
BACKGROUND: Biochemical markers of bone turnover (BTMs) provide useful information in the diagnosis and management of metabolic bone diseases. Currently, there exist few published reference ranges for bone markers in healthy premenopausal women using the newer, automated assays of bone turnover. This cross-sectional study of healthy premenopausal women was performed to determine reference ranges for four different markers of bone turnover and to compare reference ranges in users and non-users of oral contraceptives (OCs). METHODS: Urinary N-telopeptide of type 1 collagen (NTX) was determined from fasting second morning-void urine of healthy premenopausal women. In addition, fasting serum was collected for determination of C-telopeptide of type I collagen (CTX), bone-specific alkaline phosphatase (bone ALP), and N-terminal propeptide of type 1 procollagen (PINP). Subjects underwent central dual energy X-ray absorptiometry and completed a questionnaire regarding medical history and activities known to affect bone health. RESULTS: Serum and urine samples were collected from 237 healthy premenopausal women (119 OC users and 118 non-users) between the ages of 28 and 45 years. The mean age of subjects was 37 years, with a mean bone mineral density T-score of -0.1 at the lumbar spine and 0.0 at the total hip. Logarithmic transformation produced normal distributions for all markers but NTX. Mid-95% ranges for each marker were generally consistent with those reported by manufacturers. For each BTM examined, values were skewed toward the lower end of the range. Median NTX levels for OC users and non-users were 16.0 and 29.0 nmol/mmol creatinine, respectively. The mid-95% ranges for NTX in OC users and non-users were 3-60 and 4-64 nmol/mmol creatinine, respectively. Median levels of CTX, bone ALP, and PINP were also lower in OC users than non-users. The mean level of each BTM was significantly lower in OC users than non-users (P<0.01), whereas reference ranges (geometric mean+/-2 SD) were somewhat similar for the two groups. CONCLUSION: Values obtained from this well-characterized population provide reference ranges for BTMs in healthy premenopausal women. Median and mean BTM levels for OC users were consistently lower compared with non-users; thus, separate reference ranges are required for these two groups of premenopausal women. The relevance of premenopausal reference ranges for postmenopausal women remains uncertain.
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Huesos/metabolismo , Salud , Premenopausia , Adulto , Distribución por Edad , Fosfatasa Alcalina/sangre , Biomarcadores/sangre , Biomarcadores/orina , Colágeno Tipo I/sangre , Colágeno Tipo I/orina , Estudios Transversales , Femenino , Humanos , Persona de Mediana Edad , Procolágeno/sangre , Encuestas y CuestionariosRESUMEN
We have previously shown that a single subcutaneous injection of glucagon-like peptide-2 (GLP-2) at 10 p.m. in postmenopausal women results in a dose-dependent decrease in the nocturnal serum and urine concentrations of fragments derived from the degradation of the C-terminal telopeptide region of collagen type I (s-CTX and u-CTX) and u-DPD, markers of bone resorption. In contrast, bone formation, as assessed by serum osteocalcin and procollagen type I N-terminal propeptide (PINP), appeared to be unaffected by treatment with exogenous GLP-2. These effects were further investigated in a 14-day study. The aim was to demonstrate that a parenteral formulation of GLP-2 is safe and well tolerated after repeated dosing in healthy postmenopausal women for 14 days. It was further investigated whether the effects on bone turnover markers were sustained throughout the study period. The study was a double-blind placebo-controlled trial with 60 postmenopausal women and 2 different doses of GLP-2 (1.6 mg and 3.2 mg GLP-2) against a saline control. The data for bone resorption revealed a similar reduction on Day 1 and Day 14, both based on time course and AUC. There were no signs of tachyphylaxis and no serious adverse reaction. Both GLP-2 doses resulted in similar and significant (p<0.001) reduction in bone resorption indicating that the maximum efficacious dose has been approached. Osteocalcin and PINP levels were unaffected at Day 1 and Day 14, suggesting a disassociation between bone resorption and bone formation during GLP-2 treatment.
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Resorción Ósea/prevención & control , Péptido 2 Similar al Glucagón/administración & dosificación , Osteogénesis/efectos de los fármacos , Osteoporosis Posmenopáusica/prevención & control , Premenopausia/fisiología , Anciano , Área Bajo la Curva , Calcio/orina , Colágeno Tipo I/sangre , Colágeno Tipo I/efectos de los fármacos , Creatinina/orina , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Femenino , Péptido 2 Similar al Glucagón/efectos adversos , Péptido 2 Similar al Glucagón/farmacocinética , Humanos , Inyecciones Subcutáneas , Osteocalcina/sangre , Osteocalcina/efectos de los fármacos , Fragmentos de Péptidos/sangre , Fragmentos de Péptidos/efectos de los fármacos , Péptidos/sangre , Péptidos/efectos de los fármacos , Fosfatos/orina , Procolágeno/sangre , Procolágeno/efectos de los fármacosRESUMEN
Denosumab is a fully human monoclonal antibody against receptor activator of NF-κB ligand (RANKL) that decreases osteoclast formation, function and survival, and is approved for the treatment of postmenopausal women with osteoporosis at increased or high risk for fracture, among other indications. During the pivotal 3-year fracture trial FREEDOM, denosumab 60 mg subcutaneously every 6 months significantly reduced new vertebral (68%), hip (40%), and nonvertebral (20%) fractures; increased bone mineral density (BMD); and reduced bone turnover markers compared with placebo in postmenopausal women with osteoporosis. Questions have arisen regarding imbalances of certain low-frequency adverse events (AEs) observed in FREEDOM, as well as the top 5 most frequent adverse reactions listed in the United States prescribing information (USPI; back pain, pain in extremity, musculoskeletal pain, hypercholesterolemia, and cystitis). We examined the incidences of these AEs in women who originally received placebo during FREEDOM and then received denosumab for up to 3 years during the FREEDOM Extension (Crossover Group). This provided a unique opportunity for comparison with the original 3-year denosumab FREEDOM observations. We also examined the incidences of these AEs over 6 years of denosumab treatment (Long-term Group; ie, comparing a second 3 years of treatment with findings in the first 3 years). There was no indication of increasing trends regarding the imbalances of either low-frequency AEs or common AEs observed in FREEDOM. © 2017 American Society for Bone and Mineral Research.
Asunto(s)
Denosumab/administración & dosificación , Osteoporosis Posmenopáusica/tratamiento farmacológico , Anciano , Anciano de 80 o más Años , Denosumab/efectos adversos , Femenino , Estudios de Seguimiento , Humanos , Persona de Mediana Edad , Osteoporosis Posmenopáusica/epidemiología , Osteoporosis Posmenopáusica/metabolismo , Osteoporosis Posmenopáusica/patología , Estados Unidos/epidemiologíaRESUMEN
BACKGROUND: Long-term safety and efficacy of osteoporosis treatment are important because of the chronic nature of the disease. We aimed to assess the long-term safety and efficacy of denosumab, which is widely used for the treatment of postmenopausal women with osteoporosis. METHODS: In the multicentre, randomised, double-blind, placebo-controlled, phase 3 FREEDOM trial, postmenopausal women aged 60-90 years with osteoporosis were enrolled in 214 centres in North America, Europe, Latin America, and Australasia and were randomly assigned (1:1) to receive 60 mg subcutaneous denosumab or placebo every 6 months for 3 years. All participants who completed the FREEDOM trial without discontinuing treatment or missing more than one dose of investigational product were eligible to enrol in the open-label, 7-year extension, in which all participants received denosumab. The data represent up to 10 years of denosumab exposure for women who received 3 years of denosumab in FREEDOM and continued in the extension (long-term group), and up to 7 years for women who received 3 years of placebo and transitioned to denosumab in the extension (crossover group). The primary outcome was safety monitoring, comprising assessments of adverse event incidence and serious adverse event incidence, changes in safety laboratory analytes (ie, serum chemistry and haematology), and participant incidence of denosumab antibody formation. Secondary outcomes included new vertebral, hip, and non-vertebral fractures as well as bone mineral density (BMD) at the lumbar spine, total hip, femoral neck, and one-third radius. Analyses were done according to the randomised FREEDOM treatment assignments. All participants who received at least one dose of investigational product in FREEDOM or the extension were included in the combined safety analyses. All participants who enrolled in the extension with observed data were included in the efficacy analyses. The FREEDOM trial (NCT00089791) and its extension (NCT00523341) are both registered with ClinicalTrials.gov. FINDINGS: Between Aug 3, 2004, and June 1, 2005, 7808 women were enrolled in the FREEDOM study. 5928 (76%) women were eligible for enrolment in the extension, and of these, 4550 (77%) were enrolled (2343 long-term, 2207 crossover) between Aug 7, 2007, and June 20, 2008. 2626 women (1343 long-term; 1283 crossover) completed the extension. The yearly exposure-adjusted participant incidence of adverse events for all individuals receiving denosumab decreased from 165·3 to 95·9 per 100 participant-years over the course of 10 years. Serious adverse event rates were generally stable over time, varying between 11·5 and 14·4 per 100 participant-years. One atypical femoral fracture occurred in each group during the extension. Seven cases of osteonecrosis of the jaw were reported in the long-term group and six cases in the crossover group. The yearly incidence of new vertebral fractures (ranging from 0·90% to 1·86%) and non-vertebral fractures (ranging from 0·84% to 2·55%) remained low during the extension, similar to rates observed in the denosumab group during the first three years of the FREEDOM study, and lower than rates projected for a virtual long-term placebo cohort. In the long-term group, BMD increased from FREEDOM baseline by 21·7% at the lumbar spine, 9·2% at total hip, 9·0% at femoral neck, and 2·7% at the one-third radius. In the crossover group, BMD increased from extension baseline by 16·5% at the lumbar spine, 7·4% at total hip, 7·1% at femoral neck, and 2·3% at one-third radius. INTERPRETATION: Denosumab treatment for up to 10 years was associated with low rates of adverse events, low fracture incidence compared with that observed during the original trial, and continued increases in BMD without plateau. FUNDING: Amgen.