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2.
Calcif Tissue Int ; 107(2): 191-194, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32430692

RESUMEN

Vitamin D-dependent rickets type 1B (VDDR1B) is an autosomal semidominant genetic disorder caused by a deficiency in CYP2R1, which encodes vitamin D 25-hydroxylase, an enzyme that plays a crucial role in the conversion of vitamin D to 25-dihydroxyvitamin D3. VDDR1B is a severe form of rickets that occurs during infancy and which is responsive to 25-OH vitamin D supplementation. We studied three adult patients from a multi-consanguineous family with VDDR1B. They have been diagnosed with pseudo-nutritional rickets and treated during their adolescence with 25-OH vitamin D. These patients stopped their treatments at the end of adolescence and were contacted 14 to 17 years later when VDDR1B diagnosis was carried out in their niece and nephews. These three patients had undetectable 25-OH vitamin D, but normal levels of plasma 1-25(OH)2 vitamin D. All patients had a hip bone mineral density and a normal vertebral despite osteoarthritis degenerative lesions which may impact BMD evaluation. These findings show that vitamin D supplementation has a questionable effect, if any, for osteoporosis prevention in adulthood in contrast to its crucial importance during infancy and adolescence.


Asunto(s)
Densidad Ósea , Colestanotriol 26-Monooxigenasa/deficiencia , Raquitismo Hipofosfatémico Familiar/complicaciones , Adolescente , Adulto , Consanguinidad , Familia 2 del Citocromo P450 , Humanos , Vitamina D/sangre
3.
Occup Environ Med ; 77(4): 214-222, 2020 04.
Artículo en Inglés | MEDLINE | ID: mdl-32079716

RESUMEN

OBJECTIVE: The objective of the study was to examine the effects of occupational exposure to diisononyl phthalate (DINP) on serum testosterone levels in male workers. METHODS: From 2015 to 2018, 97 male workers were recruited from six French factories in the plastics industry. In a short longitudinal study, changes over 3 days in the level of total or free serum testosterone and DINP exposure were measured. DINP exposure was measured by urinary biomonitoring: mono-4-methyl-7-oxo-octyl phthalate (OXO-MINP), mono-4-methyl-7-hydroxy-octyl phthalate (OH-MINP) and mono-4-methyl-7-carboxyheptylphthalate (CX-MINP). We further analysed changes in follicle-stimulating hormone, luteinising hormone, total testosterone to oestradiol ratio and two bone turnover markers (procollagen-type-I-N propeptide, C terminal cross-linking telopeptide of type I collagen), and erectile dysfunction via standardised questionnaires (International Index of Erectile Function, Androgen Deficiency in Aging Males). Linear mixed models were used with the variables 'age' and 'abdominal diameter' included as confounder. RESULTS: Increased urinary OXO-MINP was associated with a significant decrease in total serum testosterone concentrations, but only for workers who exhibited the smallest variations and lowest exposures (p=0.002). The same pattern was observed for CX-MINP but was not significant; no association with OH-MINP was detectable. More self-reported erectile problems were found in workers exposed directly to DINP at the workstation (p=0.01). No changes were observed for the other biological parameters. CONCLUSIONS: Short-term exposure to DINP is associated with a decrease in total serum testosterone levels in male workers. Our results suggest that DINP could present weak antiandrogenic properties in humans, but these need to be confirmed by other studies.


Asunto(s)
Exposición Profesional/efectos adversos , Ácidos Ftálicos/efectos adversos , Ácidos Ftálicos/orina , Testosterona/sangre , Adulto , Biomarcadores/sangre , Biomarcadores/orina , Monitoreo del Ambiente/métodos , Francia , Humanos , Industrias , Modelos Lineales , Estudios Longitudinales , Masculino , Persona de Mediana Edad , Exposición Profesional/análisis , Plásticos
4.
Sci Rep ; 9(1): 19419, 2019 12 19.
Artículo en Inglés | MEDLINE | ID: mdl-31857638

RESUMEN

Immune control point (ICI) inhibitors represent a significant advance in the management and survival of cancers such as melanoma or non-small cell bronchial carcinoma. However, they induce unusual side effects, such as hypophysitis, which are rarely described elsewhere. This nationwide retrospective study describes the characteristics of hypophysitis reported in the French pharmacovigilance database (FPVD). We requested for all cases of ICI-related hypophysitis registered in the FPVD before May 2018. An endocrinologist and a pharmacologist reviewed all cases. About 94 pituitary cases were selected, involving 49 females and 45 men. Ipilimumab alone or in combination was the most represented ICI (56%). Most cases (61%) were grade 3 severity and the majority (90%) were corticotropic deficiency cases. Cases with thyroid and/or gonadotropic involvement were 21% and 1% respectively. Five patients (8%) had panhypopituitarism. Pituitary MRI, when performed, was in favor of hypophysitis in 50%. No patient recovered his previous hormonal function. The mean time of onset was significantly shorter with ipilimumab than other ICIs. ICI-related hypophysitis generate deficits that do not spontaneously recover, even at a distance from the event, unlike thyroiditis. Patients must then benefit from long-term coordinated onco-endocrinological management, adapted to their own specific deficits.


Asunto(s)
Bases de Datos Factuales , Hipofisitis/etiología , Inmunoterapia/efectos adversos , Farmacovigilancia , Anciano , Femenino , Francia , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos
5.
Virchows Arch ; 474(6): 721-734, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30868297

RESUMEN

Current histoprognostic parameters and prognostic scores used in paragangliomas and pheochromocytomas do not adequately predict the risk of metastastic progression and survival. Here, using a series of 147 cases of paraganglioma and pheochromocytoma, we designed and evaluated the potential of a new score, the COPPS (COmposite Pheochromocytoma/paraganglioma Prognostic Score), by taking into consideration three clinico-pathological features (including tumor size, necrosis, and vascular invasion), and the losses of PS100 and SDHB immunostain to predict the risk of metastasis. We compared also the performance of the COPPS with several presently used histoprognostic parameters in risk assessment of these tumors. A PASS score (Pheochromocytoma of the Adrenal gland Scaled Score) ≥ 6 was significantly associated with the occurrence of metastases (P < 0.0001) and shorter PFS (P = 0.013). In addition, both MCM6 and Ki-67 LI correlated with worse PFS (P = 0.004 and P < 0.0001, respectively), and MCM6, but not Ki-67, was significantly higher in metastatic group (P = 0.0004). Loss of PS100 staining correlated with the occurrence of metastasis (P < 0.0001) and shorter PFS (P < 0.0001). At a value of greater or equal to 3, the COPPS correlated with shorter PFS (P < 0.0001), and predicted reproducibly (weighted Kappa coefficient, 0.863) the occurrence of metastases with a sensitivity of 100.0% and specificity of 94.7%. It thus surpassed those found for either PASS, SDHB, MCM6, or Ki-67 alone. In conclusion, while validation is still necessary in independent confirmatory cohorts, COPPS could be of great potential for the risk assessment of metastasis and progression in paragangliomas and pheochromocytomas.


Asunto(s)
Metástasis de la Neoplasia/diagnóstico , Paraganglioma/mortalidad , Feocromocitoma/mortalidad , Feocromocitoma/patología , Adolescente , Neoplasias de las Glándulas Suprarrenales/diagnóstico , Neoplasias de las Glándulas Suprarrenales/patología , Adulto , Anciano , Anciano de 80 o más Años , Biomarcadores de Tumor/análisis , Niño , Femenino , Humanos , Masculino , Persona de Mediana Edad , Procesos Neoplásicos , Pronóstico , Supervivencia sin Progresión , Medición de Riesgo , Adulto Joven
6.
Bull Cancer ; 106(12S1): S75-S100, 2019 Dec.
Artículo en Francés | MEDLINE | ID: mdl-32008741

RESUMEN

INTRODUCTION: Objectives: the purpose of this study is to assess TAM safety in terms of side effects and hormonal status, the persistence of the treatment over a five years time-frame and to report the remote follow-up data. METHODS: Fifty five patients were included patients between January 2001 and November 2002 at the Institut de cancérologie de Lorraine. The subjects were aged 50 years or less, premenopausal at diagnosis and treated with adjuvant TAM therapy at a daily dose of 20 mg, for an expected duration of 5 years, at a daily. After 2 years, prospective evaluation was completed and monitoring of ovarian function was performed as usual in the institution (1x/year). All data were retrospectively evaluated in 2019. RESULTS: In these 55 patients, the cumulative incidences of cysts and hot flushes 5 years after treatment were 68.5 % and 77.6 %, respectively. Of the 33 patients with chemoreactive amenorrhea, half had cycles which resumed within a median of 9 months. In the 10 patients without chemotherapy-induced amenorrhea, 4 had a cycle stop. Of these, 3 patients had cycles that, resumed within 1, 4 and 8 months. 34 patients (61.3 %) had taken Tamoxifen for at least 5 years. After 15 years of treatment, overall and progression-free survival was 90.7 % and 67.4 %, respectively. CONCLUSION: The observation of the tolerance to the treatment for 5 years and beyond, contributes to the quality of information delivered to future patients starting the treatment, allowing a better understanding and in the long term a better observance.


Asunto(s)
Antineoplásicos Hormonales/efectos adversos , Neoplasias de la Mama/tratamiento farmacológico , Premenopausia , Tamoxifeno/efectos adversos , Adulto , Amenorrea/inducido químicamente , Antineoplásicos Hormonales/administración & dosificación , Inhibidores de la Aromatasa/uso terapéutico , Neoplasias de la Mama/mortalidad , Instituciones Oncológicas , Quimioterapia Adyuvante , Femenino , Estudios de Seguimiento , Francia , Sofocos/inducido químicamente , Sofocos/epidemiología , Humanos , Incidencia , Quistes Ováricos/inducido químicamente , Quistes Ováricos/epidemiología , Supervivencia sin Progresión , Estudios Prospectivos , Estudios Retrospectivos , Moduladores Selectivos de los Receptores de Estrógeno/administración & dosificación , Moduladores Selectivos de los Receptores de Estrógeno/efectos adversos , Tamoxifeno/administración & dosificación , Factores de Tiempo
7.
Calcif Tissue Int ; 104(4): 355-363, 2019 04.
Artículo en Inglés | MEDLINE | ID: mdl-30554334

RESUMEN

Osteoporosis is a common complication of cerebral palsy and Rett's syndrome. It is responsible for multiple fractures, bone pain, and impaired quality of life. In case of Rett's syndrome, a specific dysfunction of osteoblasts causes bone fragility. We observed the effects of annual zoledronic acid (ZA) infusion in a cohort of children with cerebral palsy and Rett's syndrome. 27 children under 18 years (19 with cerebral palsy and 8 girls with Rett syndrome confirmed by MCEP2 mutation) were treated with an annual injection of 0.1 mg/kg (max 4 mg) of ZA. Calcium and vitamin D were combined in all patients from the first injection of ZA. Dental examination was performed before treatment. Data were analyzed retrospectively. Bone mineral density was measured at diagnosis and yearly thereafter. Bone mass density (BMD) is decreased in patient with cerebral palsy and RS. One year after injection of ZA, we observe an increase of Lumbar spine BMD from - 2.99 to - 2.14 SD (p < 0.0001) and femoral BMD from - 4.26 to - 3.32 SD (p < 0.001) In the subgroup of patient with Rett syndrome, we also observe an increase from - 3.27 to 2.50 SD (p = 0.018) of Lumbar spine BMD. No fractures have been observed in our cohort since the first infusion. Side effects (flu-like syndrome and hypocalcemia) were more common in younger patients and after the first infusion. No serious complications were noticed. This study confirms the efficacy and the safety of an annual injection of ZA to improve bone status in children with cerebral palsy and Rett syndrome. No severe adverse effects were observed.


Asunto(s)
Parálisis Cerebral/tratamiento farmacológico , Osteoporosis/tratamiento farmacológico , Síndrome de Rett/tratamiento farmacológico , Ácido Zoledrónico/uso terapéutico , Adolescente , Densidad Ósea/efectos de los fármacos , Conservadores de la Densidad Ósea/uso terapéutico , Huesos/efectos de los fármacos , Huesos/fisiopatología , Niño , Fracturas Óseas/tratamiento farmacológico , Humanos , Imidazoles/uso terapéutico , Factores de Tiempo , Ácido Zoledrónico/administración & dosificación
8.
Fundam Clin Pharmacol ; 33(2): 241-249, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30308083

RESUMEN

Immunotherapy with immune checkpoint inhibitors (ICIs) for cancer has become increasingly prescribed in recent years. Indeed, it is used to treat both solid and hematological malignancies due to their considerable potential in treating melanoma, non-small cell lung and other cancers. Immune-mediated related adverse endocrine toxicity, and especially thyroiditis, is seen as a growing problem needing specific screening and management. This study aims at describing thyroid dysfunctions induced by the ICIs marketed in France, which are registered in the French Pharmacovigilance database. This database was queried for nivolumab, pembrolizumab, and ipilimumab-induced adverse drug reactions reported before April 30, 2017. Both a pharmacologist and an endocrinologist have reviewed each case to select only those of peripheral thyroiditis (thyrotoxicosis and hypothyroidism). During this period, 110 thyroiditis following ICI therapy were reported. Sex/ratio was around one. Most of the cases (47.2%) were asymptomatic. Although some thyrotoxicosis cases were severe, no orbitopathy was reported. Hypothyroidism and thyrotoxicosis were equally described. Antithyroid antibodies were positive in only 16% patients. The ultrasonography was informative in 19% patients. Levothyroxine supplementation was necessary in 57% patients, leading to 19% recovery. With a dedicated optimized management, most of the cases did not require immunotherapy discontinuation. Finally, immune-mediated related thyroiditis is increasing due to a wider prescription of ICI therapy in various cancer conditions and systematic screening. Often asymptomatic, they lead to a local activation accompanied by hormonal deficiency in the long run. It is necessary to carry out an early and sustained multidisciplinary screening to allow immunotherapy continuation.


Asunto(s)
Sistemas de Registro de Reacción Adversa a Medicamentos , Anticuerpos Monoclonales Humanizados/efectos adversos , Antineoplásicos Inmunológicos/efectos adversos , Ipilimumab/efectos adversos , Nivolumab/efectos adversos , Farmacovigilancia , Tiroiditis/inducido químicamente , Adulto , Anciano , Anciano de 80 o más Años , Bases de Datos Factuales , Femenino , Francia/epidemiología , Humanos , Masculino , Persona de Mediana Edad , Vigilancia de Productos Comercializados , Estudios Retrospectivos , Medición de Riesgo , Factores de Riesgo , Tiroiditis/diagnóstico por imagen , Tiroiditis/epidemiología , Tiroiditis/inmunología , Factores de Tiempo , Adulto Joven
9.
J Pers Med ; 8(4)2018 12 12.
Artículo en Inglés | MEDLINE | ID: mdl-30545130

RESUMEN

The 9th traditional biannual conference on Systems Medicine, Personalised Health & Therapy-"The Odyssey from Hope to Practice", inspired by the Greek mythology, was a call to search for practical solutions in cardio-metabolic diseases and cancer, to resolve and overcome the obstacles in modern medicine by creating more interactions among disciplines, as well as between academic and industrial research, directed towards an effective 'roadmap' for personalised health and therapy. The 9th Santorini Conference, under the Presidency of Sofia Siest, the director of the INSERM U1122; IGE-PCV (www.u1122.inserm.fr), University of Lorraine, France, offered a rich and innovative scientific program. It gathered 34 worldwide distinguished speakers, who shared their passion for personalised medicine with 160 attendees in nine specific sessions on the following topics: First day: The Odyssey from hope to practice: Personalised medicine-landmarks and challenges Second day: Diseases to therapeutics-genotype to phenotype an "-OMICS" approach: focus on personalised therapy and precision medicine Third day: Gene-environment interactions and pharmacovigilance: a pharmacogenetics approach for deciphering disease "bench to clinic to reality" Fourth day: Pharmacogenomics to drug discovery: a big data approach and focus on clinical data and clinical practice. In this article we present the topics shared among the participants of the conference and we highlight the key messages.

10.
Neuroendocrinology ; 107(3): 228-236, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-29949805

RESUMEN

BACKGROUND: 18F-FDOPA positron emission tomography/computed tomography (PET/CT) is a sensitive nuclear imaging technology for the diagnosis of pheochromocytomas (PHEO). However, its utility in determining predictive factors for the secretion of catecholamines remains poorly studied. METHODS: Thirty-nine histologically confirmed PHEO were included in this retrospective single-center study. Patients underwent 18F-FDOPA PET/CT before surgery, with an evaluation of several uptake parameters (standardized uptake values [SUVmax and SUVmean] and the metabolic burden [MB] calculated as follows: MB = SUVmean × tumor volume) and measurement of plasma and/or urinary metanephrine (MN), normetanephrine (NM), and chromogranin A. Thirty-five patients were screened for germline mutations in the RET, SDHx, and VHL genes. Once resected, primary cultures of 5 PHEO were used for real-time measurement of catecholamine release by carbon fiber amperometry. RESULTS: The MB of the PHEO positively correlated with 24-h urinary excretion of NM (r = 0.64, p < 0.0001), MN (r = 0.49, p = 0.002), combined MN and NM (r = 0.75, p < 0.0001), and eventually plasma free levels of NM (r = 0.55, p = 0.006). In the mutated patients (3 SDHD, 2 SDHB, 3 NF1, 1 VHL, and 3 RET), a similar correlation was observed between MB and 24-h urinary combined MN and NM (r = 0.86, p = 0.0012). For the first time, we demonstrate a positive correlation between the PHEO-to-liver SUVmax ratio and the mean number of secretory granule fusion events of the corresponding PHEO cells revealed by amperometric spikes (p = 0.01). CONCLUSION: While the 18F-FDOPA PET/CT MB of PHEO strongly correlates with the concentration of MN, amperometric recordings suggest that 18F-FDOPA uptake could be enhanced by overactivity of catecholamine exocytosis.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/metabolismo , Catecolaminas/metabolismo , Feocromocitoma/metabolismo , Neoplasias de las Glándulas Suprarrenales/diagnóstico por imagen , Adulto , Anciano , Dihidroxifenilalanina/análogos & derivados , Femenino , Humanos , Masculino , Persona de Mediana Edad , Feocromocitoma/diagnóstico por imagen , Tomografía Computarizada por Tomografía de Emisión de Positrones , Estudios Retrospectivos
11.
Joint Bone Spine ; 85(5): 519-530, 2018 10.
Artículo en Inglés | MEDLINE | ID: mdl-29654947

RESUMEN

OBJECTIVES: To update the 2012 recommendations on pharmacotherapy for postmenopausal osteoporosis, under the aegis of the Bone Task Force of the French Society for Rheumatology (SFR) and of the Osteoporosis Research and Information Group (GRIO), in collaboration with scientific societies (Collège national des généralistes enseignants, Collège national des gynécologues et obstétriciens français, Fédération nationale des collèges de gynécologie médicale, Groupe d'étude de la ménopause et du vieillissement hormonal, Société française de chirurgie orthopédique, Société française d'endocrinologie, and Société française de gériatrie et de gérontologie). METHODS: Updated recommendations were developed by a task force whose members represented the medical specialties involved in the management of postmenopausal osteoporosis. The update was based on a literature review and developed using the method advocated by the French National Authority for Health (HAS). DISCUSSION AND CONCLUSION: The updated recommendations place strong emphasis on the treatment of women with severe fractures, in whom the use of osteoporosis medications is recommended. All the available osteoporosis medications are suitable in patients with severe fractures; zoledronic acid deserves preference as the fist-line drug after a hip fracture. In patients with or without non-severe fractures, the decision to use osteoporosis medications is based on bone mineral density values and in challenging cases, on probabilities supplied by prediction tools such as FRAX®. All osteoporosis medications are suitable; raloxifene should be reserved for patients at low risk for peripheral fractures. The fracture risk should be reevaluated every 2 to 3 years to decide on the best follow-up treatment. These updated recommendations discuss the selection of first-line osteoporosis medications and treatment sequences.


Asunto(s)
Conservadores de la Densidad Ósea/uso terapéutico , Difosfonatos/uso terapéutico , Osteoporosis Posmenopáusica/tratamiento farmacológico , Fracturas Osteoporóticas/prevención & control , Guías de Práctica Clínica como Asunto , Absorciometría de Fotón/métodos , Anciano , Densidad Ósea , Manejo de la Enfermedad , Femenino , Predicción , Francia , Humanos , Persona de Mediana Edad , Osteoporosis Posmenopáusica/diagnóstico , Osteoporosis Posmenopáusica/epidemiología , Pronóstico , Medición de Riesgo
13.
Growth Factors ; 36(5-6): 263-273, 2018 12.
Artículo en Inglés | MEDLINE | ID: mdl-30764675

RESUMEN

Paired cartilage and subchondral bone of subjects with no clinical history of joint disorders were analyzed to determine whether antioxidant enzymes, inflammatory cytokines and growth factors can be linked to a pre-osteoarthritis. Tissue explants were phenotyped according to Osteoarthritis Research Society International grading and micro-computed tomography, and also screened for the expression of several markers using quantitative polymerase chain reaction. The expression of these same genes was measured in SW1353 cells treated with hydrogen peroxide, to gain insight into the pathways involved with oxidative stress responses. Vascular endothelial growth factor A (VEGF-A) was up-regulated in the cartilage samples that showed early cartilage or bone degeneration. Oxidative stress in chondrocytes provoked up-regulation of interleukin-1ß, interleukin-6, aggrecan, and SRY-box containing gene 9. Our results confirm the hitherto evidence of the deteriorating effects of the oxidative stress on cartilage and suggest the link between VEGF-A and pre-osteoarthritis.


Asunto(s)
Huesos/metabolismo , Cartílago/metabolismo , Osteoartritis/metabolismo , Factor A de Crecimiento Endotelial Vascular/metabolismo , Anciano , Agrecanos/genética , Agrecanos/metabolismo , Huesos/patología , Cartílago/patología , Línea Celular Tumoral , Células Cultivadas , Femenino , Humanos , Interleucina-1beta/genética , Interleucina-1beta/metabolismo , Masculino , Persona de Mediana Edad , Estrés Oxidativo , Factor de Transcripción SOX9/genética , Factor de Transcripción SOX9/metabolismo , Regulación hacia Arriba , Factor A de Crecimiento Endotelial Vascular/genética
16.
J Bone Miner Res ; 32(9): 1893-1899, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28548312

RESUMEN

Vitamin D requires a two-step activation by hydroxylation: The first step is catalyzed by hepatic 25-hydroxylase (CYP2R1, 11p15.2) and the second one is catalyzed by renal 1α-hydroxylase (CYP27B1, 12q13.1), which produces the active hormonal form of 1,25-(OH)2 D. Mutations of CYP2R1 have been associated with vitamin D-dependent rickets type 1B (VDDR1B), a very rare condition that has only been reported to affect 4 families to date. We describe 7 patients from 2 unrelated families who presented with homozygous loss-of-function mutations of CYP2R1. Heterozygous mutations were present in their normal parents. We identified a new c.124_138delinsCGG (p.Gly42_Leu46delinsArg) variation and the previously published c.296T>C (p.Leu99Pro) mutation. Functional in vitro studies confirmed loss-of-function enzymatic activity in both cases. We discuss the difficulties in establishing the correct diagnosis and the specific biochemical pattern, namely, very low 25-OH-D suggestive of classical vitamin D deficiency, in the face of normal/high concentrations of 1,25-(OH)2 D. Siblings exhibited the three stages of rickets based on biochemical and radiographic findings. Interestingly, adult patients were able to maintain normal mineral metabolism without vitamin D supplementation. One index case presented with a partial improvement with 1alfa-hydroxyvitamin D3 or alfacalcidol (1α-OH-D3 ) treatment, and we observed a dramatic increase in the 1,25-(OH)2 D serum concentration, which indicated the role of accessory 25-hydroxylase enzymes. Lastly, in patients who received calcifediol (25-OH-D3 ), we documented normal 24-hydroxylase activity (CYP24A1). For the first time, and according to the concept of personalized medicine, we demonstrate dramatic improvements in patients who were given 25-OH-D therapy (clinical symptoms, biochemical data, and bone densitometry). In conclusion, the current study further expands the CYP2R1 mutation spectrum. We note that VDDR1B could be easily mistaken for classical vitamin D deficiency. © 2017 American Society for Bone and Mineral Research.


Asunto(s)
Colestanotriol 26-Monooxigenasa/deficiencia , Familia 2 del Citocromo P450/deficiencia , Errores Diagnósticos , Ergocalciferoles/administración & dosificación , Mutación , Raquitismo , 25-Hidroxivitamina D3 1-alfa-Hidroxilasa/deficiencia , Adulto , Niño , Preescolar , Femenino , Humanos , Masculino , Raquitismo/diagnóstico , Raquitismo/tratamiento farmacológico , Raquitismo/enzimología , Raquitismo/genética , Vitamina D/análogos & derivados , Vitamina D/sangre
17.
JAMA Oncol ; 3(9): 1204-1212, 2017 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-28384794

RESUMEN

IMPORTANCE: Effective cancer prevention is based on accurate molecular diagnosis and results of genetic family screening, genotype-informed risk assessment, and tailored strategies for early diagnosis. The expanding etiology for hereditary pheochromocytomas and paragangliomas has recently included SDHA, TMEM127, MAX, and SDHAF2 as susceptibility genes. Clinical management guidelines for patients with germline mutations in these 4 newly included genes are lacking. OBJECTIVE: To study the clinical spectra and age-related penetrance of individuals with mutations in the SDHA, TMEM127, MAX, and SDHAF2 genes. DESIGN, SETTING, AND PATIENTS: This study analyzed the prospective, longitudinally followed up European-American-Asian Pheochromocytoma-Paraganglioma Registry for prevalence of SDHA, TMEM127, MAX, and SDHAF2 germline mutation carriers from 1993 to 2016. Genetic predictive testing and clinical investigation by imaging from neck to pelvis was offered to mutation-positive registrants and their relatives to clinically characterize the pheochromocytoma/paraganglioma diseases associated with mutations of the 4 new genes. MAIN OUTCOMES AND MEASURES: Prevalence and spectra of germline mutations in the SDHA, TMEM127, MAX, and SDHAF2 genes were assessed. The clinical features of SDHA, TMEM127, MAX, and SDHAF2 disease were characterized. RESULTS: Of 972 unrelated registrants without mutations in the classic pheochromocytoma- and paraganglioma-associated genes (632 female [65.0%] and 340 male [35.0%]; age range, 8-80; mean [SD] age, 41.0 [13.3] years), 58 (6.0%) carried germline mutations of interest, including 29 SDHA, 20 TMEM127, 8 MAX, and 1 SDHAF2. Fifty-three of 58 patients (91%) had familial, multiple, extra-adrenal, and/or malignant tumors and/or were younger than 40 years. Newly uncovered are 7 of 63 (11%) malignant pheochromocytomas and paragangliomas in SDHA and TMEM127 disease. SDHA disease occurred as early as 8 years of age. Extra-adrenal tumors occurred in 28 mutation carriers (48%) and in 23 of 29 SDHA mutation carriers (79%), particularly with head and neck paraganglioma. MAX disease occurred almost exclusively in the adrenal glands with frequently bilateral tumors. Penetrance in the largest subset, SDHA carriers, was 39% at 40 years of age and is statistically different in index patients (45%) vs mutation-carrying relatives (13%; P < .001). CONCLUSIONS AND RELEVANCE: The SDHA, TMEM127, MAX, and SDHAF2 genes may contribute to hereditary pheochromocytoma and paraganglioma. Genetic testing is recommended in patients at clinically high risk if the classic genes are mutation negative. Gene-specific prevention and/or early detection requires regular, systematic whole-body investigation.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/genética , Predisposición Genética a la Enfermedad , Neoplasias de Cabeza y Cuello/genética , Neoplasias Primarias Secundarias/genética , Paraganglioma Extraadrenal/genética , Feocromocitoma/genética , Adolescente , Neoplasias de las Glándulas Suprarrenales/diagnóstico por imagen , Adulto , Edad de Inicio , Anciano , Anciano de 80 o más Años , Factores de Transcripción Básicos con Cremalleras de Leucinas y Motivos Hélice-Asa-Hélice/genética , Niño , Análisis Mutacional de ADN , Detección Precoz del Cáncer/métodos , Complejo II de Transporte de Electrones/genética , Femenino , Pruebas Genéticas , Genotipo , Mutación de Línea Germinal , Neoplasias de Cabeza y Cuello/diagnóstico por imagen , Humanos , Estudios Longitudinales , Imagen por Resonancia Magnética , Masculino , Proteínas de la Membrana/genética , Persona de Mediana Edad , Proteínas Mitocondriales/genética , Paraganglioma Extraadrenal/diagnóstico por imagen , Penetrancia , Feocromocitoma/diagnóstico por imagen , Estudios Prospectivos , Sistema de Registros , Adulto Joven
19.
FASEB J ; 30(10): 3598-3612, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-27435264

RESUMEN

Deficiency in methyl donor (folate and vitamin B12) and in vitamin D is independently associated with altered bone development. Previously, methyl donor deficiency (MDD) was shown to weaken the activity of nuclear receptor coactivator, peroxisome proliferator-activated receptor-γ coactivator-1α (PGC1α), for nuclear signaling in rat pups, including estrogen receptor-α and estrogen-related receptor-α; its effect on vitamin D receptor (VDR) signaling, however, is unknown. We studied bone development under MDD in rat pups and used human MG-63 preosteoblast cells to better understand the associated molecular mechanism. In young rats, MDD decreased total body bone mineral density, reduced tibia length, and impaired growth plate maturation, and in preosteoblasts, MDD slowed cellular proliferation. Mechanistic studies revealed decreased expression of VDR, estrogen receptor-α, PGC1α, arginine methyltransferase 1, and sirtuin 1 in both rat proximal diaphysis of femur and in MG-63, as well as decreased nuclear VDR-PGC1α interaction in MG-63 cells. The weaker VDR-PGC1α interaction could be attributed to the reduced protein expression, imbalanced PGC1α methylation/acetylation, and nuclear VDR sequestration by heat shock protein 90 (HSP90). These together compromised bone development, which is reflected by lowered bone alkaline phosphatase and increased proadipogenic peroxisome proliferator-activated receptor-γ, adiponectin, and estrogen-related receptor-α expression. Of interest, under MDD, the bone development effects of 1,25-dihydroxyvitamin D3 were ineffectual and these could be rescued by the addition of S-adenosylmethionine, which restored expression of arginine methyltransferase 1, PGC1α, adiponectin, and HSP90. In conclusion, MDD inactivates vitamin D signaling via both disruption of VDR-PGC1α interaction and sequestration of nuclear VDR attributable to HSP90 overexpression. These data suggest that vitamin D treatment may be ineffective under MDD.-Feigerlova, E., Demarquet, L., Melhem, H., Ghemrawi, R., Battaglia-Hsu, S.-F., Ewu, E., Alberto, J.-M., Helle, D., Weryha, G., Guéant, J.-L. Methyl donor deficiency impairs bone development via peroxisome proliferator-activated receptor-γ coactivator-1α-dependent vitamin D receptor pathway.


Asunto(s)
Desarrollo Óseo/fisiología , PPAR gamma/metabolismo , Receptores de Calcitriol/metabolismo , Animales , Calcitriol/metabolismo , Línea Celular Tumoral , Femenino , Proteínas de Choque Térmico/metabolismo , Humanos , Ratas , Receptores de Estrógenos/metabolismo , Transducción de Señal/efectos de los fármacos , Receptor Relacionado con Estrógeno ERRalfa
20.
Int J Endocrinol ; 2016: 7586482, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-26977147

RESUMEN

Introduction. Differentiated thyroid cancer (DTC) is rare and confers good prognosis. Long-term health related quality of life (HRQoL) and pregnancy outcomes are not well known in subjects treated during adolescence and young adulthood. Methods. Cross-sectional analysis of HRQoL and global self-esteem, using SF-36 and ISP-25 surveys, and of pregnancy outcomes in female survivors of DTC treated by total thyroidectomy and I(131) before age of 25 years. Results. Forty-five of 61 patients (74%) responded to the survey. Cumulative I(131) activity was ≤3.85 GBq in 18 subjects and >3.85 GBq in 27 subjects. Mean time from diagnosis was 7.6 ± 5.2 years for the group ≤ 3.85 GBq versus 16.9 ± 11.6 years for the group > 3.85 GBq (P < 0.05). No significant alteration in long-term HRQoL and global self-esteem was observed. Thirty pregnancies after I(131) were noted in patients from the group > 3.85 GBq and 10 in patients from the group ≤ 3.85 GBq. Frequency of miscarriages was of 17% (group > 3.85 GBq) and 10% (group ≤ 3.85 GBq) with 9 and 24 live births, respectively. No congenital malformations or first year mortality was noted. Conclusion. Long-term HRQoL, global self-esteem, and pregnancy outcomes are not affected in young female survivors of DTC.

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