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1.
Osteoporos Int ; 32(4): 663-670, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33113007

RESUMEN

Acute phase response (APR), including myalgia, influenza-like symptoms, headache, arthralgia, and pyrexia, is the most common adverse reaction to initial zoledronic acid infusion. Dexamethasone plus acetaminophen is effective in significantly reducing the incidence and severity of APR. INTRODUCTION: Acute phase response (APR), including myalgia, influenza-like symptoms, headache, arthralgia, and pyrexia, is due to immunomodulatory actions and is the most common adverse reaction to zoledronic acid (ZOL). The aims of our study were to compare the differences between acetaminophen and dexamethasone plus acetaminophen on the incidence and severity of APRs and to clarify the clinical factors related to APR with initial ZOL infusion. METHODS: Patients with osteoporosis receiving their first ZOL infusion (N = 96) were assigned into two groups and given either acetaminophen (58 patients, control group) or acetaminophen plus dexamethasone (38 patients, study group). APRs were assessed through telephone interviews 2 weeks later post-infusion. Clinical, demographic, and serologic data were recorded. RESULTS: There was a significant increase in the incidence and severity of any APR in the control group than the study group (67% vs. 34%, p = 0.003; 0.69 ± 0.50 vs. 0.34 ± 0.48, p = 0.001). Among the APRs, only myalgia incidence and score were significantly higher in the control group than in the study group. Multivariate analysis demonstrated that previous use of osteoporosis medication and participation in the study group was negatively related to the occurrence of any APR or myalgia. Advanced age was shown to significantly increase myalgia. Study group participants had significantly reduced severity of myalgia. The adherence for redosing ZOL was significantly higher in the study group. CONCLUSION: Dexamethasone plus acetaminophen is effective in significantly reducing the incidence and severity of APR, especially myalgia, and increasing adherence following initial ZOL infusion.


Asunto(s)
Conservadores de la Densidad Ósea , Osteoporosis Posmenopáusica , Reacción de Fase Aguda/inducido químicamente , Conservadores de la Densidad Ósea/efectos adversos , Dexametasona/efectos adversos , Difosfonatos/efectos adversos , Femenino , Humanos , Imidazoles/efectos adversos , Ácido Zoledrónico
2.
Osteoporos Int ; 29(4): 779-792, 2018 04.
Artículo en Inglés | MEDLINE | ID: mdl-29285627

RESUMEN

The analysis aimed to identify the treatment gaps in current fracture liaison services (FLS) and to provide recommendations for best practice establishment of future FLS across the Asia-Pacific region. The findings emphasize the unmet need for the implementation of new programs and provide recommendations for the refinement of existing ones. The study's objectives were to evaluate fracture liaison service (FLS) programs in the Asia-Pacific region and provide recommendations for establishment of future FLS programs. A systematic literature review (SLR) of Medline, PubMed, EMBASE, and Cochrane Library (2000-2017 inclusive) was performed using the following keywords: osteoporosis, fractures, liaison, and service. Inclusion criteria included the following: patients ≥ 50 years with osteoporosis-related fractures; randomized controlled trials or observational studies with control groups (prospective or retrospective), pre-post, cross-sectional and economic evaluation studies. Success of direct or indirect interventions was assessed based on patients' understanding of risk, bone mineral density assessment, calcium intake, osteoporosis treatment, re-fracture rates, adherence, and mortality, in addition to cost-effectiveness. Overall, 5663 unique citations were identified and the SLR identified 159 publications, reporting 37 studies in Asia-Pacific. These studies revealed the unmet need for public health education, adequate funding, and staff resourcing, along with greater cooperation between departments and physicians. These actions can help to overcome therapeutic inertia with sufficient follow-up to ensure adherence to recommendations and compliance with treatment. The findings also emphasize the importance of primary care physicians continuing to prescribe treatment and ensure service remains convenient. These findings highlight the limited evidence supporting FLS across the Asia-Pacific region, emphasizing the unmet need for new programs and/or refinement of existing ones to improve outcomes. With the continued increase in burden of fractures in Asia-Pacific, establishment of new FLS and assessment of existing services are warranted to determine the impact of FLS for healthcare professionals, patients, family/caregivers, and society.


Asunto(s)
Prestación Integrada de Atención de Salud/organización & administración , Evaluación de Necesidades/organización & administración , Osteoporosis/tratamiento farmacológico , Fracturas Osteoporóticas/prevención & control , Asia/epidemiología , Australasia/epidemiología , Conservadores de la Densidad Ósea/uso terapéutico , Análisis Costo-Beneficio , Prestación Integrada de Atención de Salud/economía , Costos de la Atención en Salud/estadística & datos numéricos , Humanos , Osteoporosis/diagnóstico , Osteoporosis/epidemiología , Fracturas Osteoporóticas/epidemiología , Educación del Paciente como Asunto/métodos , Evaluación de Programas y Proyectos de Salud , Recurrencia
3.
Zhonghua Xue Ye Xue Za Zhi ; 38(5): 379-383, 2017 May 14.
Artículo en Chino | MEDLINE | ID: mdl-28565735

RESUMEN

Objective: To evaluate the efficacy and safety of maintenance therapy with reduced dose of rhTPO in the patients with primary immune thrombocytopenia (ITP) who attained stable platelet (PLT) counts after daily administration of rhTPO. Methods: Treatment was started with a daily administration of rhTPO (300 U/kg) for 2 consecutive weeks. Patients who attained stable PLT≥50×10(9)/L were enrolled to maintenance therapy starting with every other day administration of rhTPO, then adjusted dose interval to maintain platelet count (30-100) ×10(9)/L. Results: A total of 91 eligible patients were enrolled. Fourteen patients discontinued the study due to noncompliance (12/14) and investigator decision (2/14) . Among 77 patients who completed the study, 38 patients with the administration of rhTPO at every other day or less could maintain PLT≥30×10(9)/L for 12 weeks. The percentage of patients with a platelet response (PLT≥30×10(9)/L) at 4(th) week, 8(th) week and 12(th) week of maintain therapy was 92.6% (63/68) , 82.7% (43/52) and 85.0% (34/40) , respectively. Median platelet counts remained in the range of (70-124) ×10(9)/L. The overall incidence of rhTPO-related adverse events was 7.7%. All the adverse events were generally mild. Conclusion: Extending the dose interval of rhTPO is feasible to maintain stable platelet count in the patients with ITP, but the optimal dose interval is uncertain and might vary with individuals.


Asunto(s)
Púrpura Trombocitopénica Idiopática , Plaquetas , Humanos , Recuento de Plaquetas , Estudios Prospectivos , Proteínas Recombinantes , Trombopoyetina
4.
Osteoporos Int ; 28(8): 2377-2382, 2017 08.
Artículo en Inglés | MEDLINE | ID: mdl-28488133

RESUMEN

The purpose of this study is to assess the differences in VFA diagnostic accuracy when using bilateral decubitus views and whether diagnostic accuracy is affected by scoliosis. Our findings show that the current practice of performing only one side is valid; however, bilateral views can improve specificity in scoliosis. INTRODUCTION: The diagnostic accuracy of vertebral fracture assessment (VFA) can be influenced by poor patient position and scoliosis. This study aims to assess the differences in VFA diagnostic accuracy for right and left lateral decubitus views and the effect of scoliosis. METHODS: One hundred fourteen postmenopausal women received right and left lateral thoracolumbar spine dual-energy VFA and radiography. Cobb angles were measured from the posteroanterior absorptiometry image, and lumbar spine radiography was the standard reference for vertebral fracture and also provides the levels investigated. McNemar's test was used to compare accuracy between the two decubitus position and Fisher's exact test was used for patients with and without scoliosis. RESULTS: Forty-two vertebral fractures (VFs) were identified. There was no significant difference in sensitivity (p = 0.125) or specificity (p = 0.866) between the left lateral decubitus (64.3, 97.2%) and right lateral decubitus (76.2, 91.1%), respectively, views. Scoliotic patients had a significantly worse specificity (92.7 vs 98.1%, p = 0.003) than patients without scoliosis; however, a combination of both decubitus positions significantly improved specificity (p < 0.001). CONCLUSION: Right and left side lateral decubitus views have excellent agreement with radiography and similar diagnostic accuracy in the detection of VFs. Thus, the current practice of performing only one side is valid. With scoliosis, bilateral decubitus views can improve the specificity of detecting VF; however, this would increase radiation dose.


Asunto(s)
Fracturas por Compresión/diagnóstico por imagen , Fracturas Osteoporóticas/diagnóstico por imagen , Fracturas de la Columna Vertebral/diagnóstico por imagen , Absorciometría de Fotón/métodos , Anciano , Anciano de 80 o más Años , Femenino , Fracturas por Compresión/complicaciones , Humanos , Vértebras Lumbares/diagnóstico por imagen , Vértebras Lumbares/lesiones , Persona de Mediana Edad , Osteoporosis Posmenopáusica/complicaciones , Osteoporosis Posmenopáusica/diagnóstico por imagen , Fracturas Osteoporóticas/complicaciones , Radiografía/métodos , Escoliosis/complicaciones , Escoliosis/diagnóstico por imagen , Sensibilidad y Especificidad , Fracturas de la Columna Vertebral/complicaciones
5.
Osteoporos Int ; 28(3): 811-818, 2017 03.
Artículo en Inglés | MEDLINE | ID: mdl-27832325

RESUMEN

We assessed the incidence of hip fracture and second hip fractures in Taiwan from 2001 to 2012. Age-standardized incidence rates decreased after 2005. However, mortality rate after first hip fracture was substantial compared to second hip fracture rate in a competing risk model. INTRODUCTION: The aim of the study is to assess the incidence rates (IRs) of hip fractures, including changes in trends and medical costs, and second hip fractures in the Taiwanese population. METHODS: The number of hip fractures and the associated medical costs were obtained from the annual report of the Ministry of Health and Welfare, Taiwan, for individuals ≥50 years of age. The data of population at risk were retrieved from annual population reports from the Ministry of the Interior, Taiwan. The incidence of second hip fractures was evaluated from the National Health Insurance Research Database of Taiwan for insured individuals aged ≥50 years from 2001 to 2011 with follow-up until 2013 using a competing risk model. RESULTS: The IR for the entire population increased from 332.7 to 336.5 per 100,000 person-years during 2001-2005 and decreased thereafter. This secular change was driven by a decrease in hip fractures for both men and women. The 10-year cumulative incidence rate of second hip fracture was 11.2% (95% CI 11.0-11.5%) in women and 7.9% (95% CI 7.6-8.1%) in men. Adjusted by consumer price index (CPI), the costs of hospitalization due to hip fracture increased from NTD 1.17 billion in 2001 to NTD 1.43 billion in 2012. However, the CPI-adjusted costs of each admission decreased from NTD 74944 in 2001 to NTD 65791 in 2012. CONCLUSIONS: Since 2006, the IR of hip fractures has been declining in Taiwan. The 10-year cumulative IR of mortality is substantial for individuals who with first hip fracture.


Asunto(s)
Fracturas de Cadera/epidemiología , Fracturas Osteoporóticas/epidemiología , Distribución por Edad , Anciano , Anciano de 80 o más Años , Bases de Datos Factuales , Femenino , Costos de la Atención en Salud/estadística & datos numéricos , Costos de la Atención en Salud/tendencias , Fracturas de Cadera/economía , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Fracturas Osteoporóticas/economía , Recurrencia , Distribución por Sexo , Taiwán/epidemiología
6.
Zhonghua Xue Ye Xue Za Zhi ; 38(12): 1017-1023, 2017 Dec 14.
Artículo en Chino | MEDLINE | ID: mdl-29365393

RESUMEN

Objective: To investigate the efficacy and safety of IA regimen which contains idarubicin (IDA) 8 mg/m(2), 10 mg/m(2) or 12 mg/m(2) as induction chemotherapy for adult patients with de-novo acute myeloid leukemia (AML) . Methods: A total of 1 215 newly diagnosed adult AML patients, ranging from May 2011 to March 2015 in the First Affiliated Hospital of Soochow University and other 36 clinical blood centers in China were enrolled in the multicenter, single-blind, non-randomized, clinical controlled study. To compare the response rate of complete remission (CR) , adverse events between different dose idarubicin combined with cytarabine (100 mg/m(2)) as induction chemotherapy in newly diagnosed patients of adult AML. Results: Of 1 207 evaluable AML patients were assigned to this analysis of CR rate. The CR rates of IDA 8 mg/m(2) group, IDA 10 mg/m(2) group and IDA 12 mg/m(2) group were 73.6% (215/292) , 84.1% (662/787) and 86.7% (111/128) , respectively (P<0.001) . After adjusted for age, blast ratio of bone marrow, FAB classification and risk stratification, the odds ratios (95% CI) of IDA 10 mg/m(2) group and IDA 12 mg/m(2) group were 0.49 (0.34-0.70) and 0.36 (0.18-0.71) , as compared with the IDA 8 mg/m(2) group (P<0.001, P=0.003) . In the intermediate and favorable groups, CR rates was 76.5% (163/213) , 86.9% (506/582) and 86.1% (68/79) in different doses of IDA (P=0.007) . Interestingly, IA regimen with IDA 10 mg/m(2) was the only beneficial factor affecting CR in this group after adjusted for age, blast ratio of bone marrow and FAB classification[OR=0.47 (95% CI 0.31-0.71) , P<0.001]. CR rates in adverse group was 50.0% (18/36) , 60.6% (43/71) and 81.8% (18/22) respectively (P=0.089) . However, the odds ratios (95% CI) of IDA 12 mg/m(2) when compared with the IDA 8 mg/m(2) was 0.22 (0.06-0.80) , after adjusted for age, blast ratio of bone marrow and FAB classification. The median time (days) of neutrophil count less than 0.5×10(9)/L in IDA 8 mg/m(2) group, IDA 10 mg/m(2) group and IDA 12 mg/m(2) group were 14 (11-18) , 15 (11-20) and 18 (14-22) , respectively (P=0.012) and of platelet count lower than 20×10(9)/L were 14 (7-17) , 15 (11-20) and 17 (15-21) , respectively (P=0.001) . The incidences of lung infection in the three groups were 9.8%, 13.5% and 25.2%, respectively (P<0.001) . Conclusions: For young adult patients (aged 18-60 years) with AML in China, intensifying induction therapy with idarubicin 10 mg/m(2) is clinically superior to IDA 8 mg/m(2) and IDA 12 mg/m(2) in favorable intermediate AML subgroup. However, idarubicin 12 mg/m(2) is more suitable to adverse AML subgroup.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Leucemia Mieloide Aguda/tratamiento farmacológico , Adolescente , Adulto , China , Citarabina , Humanos , Idarrubicina , Persona de Mediana Edad , Inducción de Remisión , Método Simple Ciego , Resultado del Tratamiento , Adulto Joven
7.
Climacteric ; 18(4): 574-81, 2015.
Artículo en Inglés | MEDLINE | ID: mdl-25581323

RESUMEN

OBJECTIVE: To explore the impact of lower concentrations of phytoestrogens on 17ß-estradiol (E2) in the growth of MCF-7 breast cells. METHODS: MCF-7 cells were treated with E2 (10(-8) mol/l), one of three phytoestrogens (genistein, resveratrol, and quercetin) (10(-7)  to 10(-5) mol/l), and with a combination of both E2 and one of these phytoestrogens for 48 h. These cells were then extracted for MTT and TUNEL assay. Western blot was utilized to evaluate the proteins involved in the proliferative and apoptotic pathways, as well as the differential effects on ERα and ß. RESULTS: MCF-7 cell proliferations were induced by both E2 alone and E2 plus one of the three phytoestrogens (at concentrations ≥ 10(-6) mol/l). Apoptotic cells were significantly increased in the phytoestrogen-treated MCF-7 cells and, conversely, suppressed in the cells treated with both E2 and phytoestrogens. Proliferating cell nuclear antigen, PI3K and p-Akt were increased in the cultures with E2 and substantially more in the cultures with E2 plus a phytoestrogen. The combination of E2 and phytoestrogen significantly inhibited the increase in FADD, cytochrome C, truncated Bid, caspase-9, caspase-3 and ERß that was induced by phytoestrogens in the MCF-7. ERα expression was significantly induced by E2 regardless of the presence of these phytoestrogens. CONCLUSIONS: This study demonstrates that, in the presence of E2, genistein, resveratrol, and quercetin may stimulate breast cancer cells, even at low physiological concentrations. Therefore, the conflicting results regarding the effects of phytoestrogens on breast cells may be attributed to the endogenous estrogen present in breast tissue.


Asunto(s)
Apoptosis/efectos de los fármacos , Mama/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Estradiol/farmacología , Fitoestrógenos/farmacología , Biomarcadores de Tumor/metabolismo , Western Blotting , Mama/metabolismo , Mama/fisiopatología , Relación Dosis-Respuesta a Droga , Femenino , Genisteína/farmacología , Humanos , Etiquetado Corte-Fin in Situ , Células MCF-7 , Quercetina/farmacología , Resveratrol , Estilbenos/farmacología
8.
Climacteric ; 17(6): 682-91, 2014 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-24978400

RESUMEN

OBJECTIVE: To explore the effect and pathway of phytoestrogens in vitro on the growth of both normal and malignant breast cells. METHODS: Normal breast MCF-10A cells and breast cancer MCF-7 cells were incubated with 10 (-10)-10(-4)  mol/l genistein, resveratrol, and quercetin (plasma concentrations in human: 10 nmol/l-10 µmol/l) for 48 h and were then extracted for a cell proliferation assay (MTT), and for a cell death assay (TUNEL) assay. The proteins involved in the proliferative and apoptotic pathways were evaluated by Western blot analysis. Additionally, a comparison with 17ß-estradiol as well as an evaluation of the differential effects on estrogen receptors (ER) α and ß were performed. RESULTS: MCF-7 cell proliferation was significantly inhibited at the concentrations greater than 10(-4) mol/l for all three phytoestrogens and from 10 (-5) mol/l for resveratrol and quercetin. MCF-10A cell proliferation was significantly increased at the concentrations from 10 (-8) to 10 (-5) mol/l for genistein and resveratrol and only at 10 (-5) mol/l for quercetin. Apoptotic cells were significantly increased by these phytoestrogens in the MCF-7 cells. At a concentration of 10 (-7)  mol/l of these phytoestrogens, a significant reduction of PI3K and Akt and an increase of Fas ligand, Fas-associated protein with death domain, cytochrome C, truncated Bid, caspase-9, and caspase-3 were noted in the MCF-7; PI3K and Akt were significantly increased in the MCF-10A. ERß expression was significantly elevated in MCF-10A and MCF-7 with these phytoestrogens. The effects of estradiol on normal and malignant breast cells were completely opposite to those of phytoestrogens. CONCLUSIONS: This study demonstrates that phytoestrogens have antiproliferative effects on breast cancer cells via an ER-dependent mechanism, even at low concentrations, but are also capable of maintaining the survival of normal breast cell via ER-independent or other mechanisms.


Asunto(s)
Neoplasias de la Mama/patología , Mama/efectos de los fármacos , Fitoestrógenos/farmacología , Apoptosis/efectos de los fármacos , Línea Celular , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Estradiol/farmacología , Receptor alfa de Estrógeno/metabolismo , Receptor beta de Estrógeno/metabolismo , Femenino , Genisteína/farmacología , Humanos , Etiquetado Corte-Fin in Situ , Células MCF-7 , Quercetina/farmacología , Resveratrol , Transducción de Señal/efectos de los fármacos , Estilbenos/farmacología
9.
Climacteric ; 17(4): 385-92, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24299158

RESUMEN

OBJECTIVE: To explore the effect and pathway of phytoestrogens on the growth of breast cancer cell line MCF-7. METHODS: MCF-7 cells (human estrogen receptor-positive and progesterone receptor-positive breast cancer cells) were cultured in serum-free medium for 24 h and then treated with genistein, resveratrol, and quercetin (10(-10)-10(-4) mol/l). After further incubation for 24, 48, 72, and 92 h, the cells were harvested and extracted for 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. According to the above results, the proteins involving proliferative and apoptotic pathways were evaluated by Western blot analysis. RESULTS: Genistein, resveratrol, and quercetin significantly inhibited cellular proliferation in a dose- and time-dependent manner. Significantly elevated caspase-3 activity was noted after treatment with genistein (10(-9)-10(-7) mol/l), as well as with resveratrol and quercetin (10(-9)-10(-5) mol/l). Significant reduction of PI3K and AKT protein and significant increase of Fas ligand, Fas-associated protein with death domain, cytochrome C, truncated Bid, caspase-9, and caspase-3 were all noted after genistein, resveratrol, and quercetin treatment. 17ß-Estradiol induced completely opposite results. Estrogen receptor (ER) α expression was significantly increased with 17ß-estradiol, whereas ERß expression was significantly elevated in the cultures with genistein, resveratrol, and quercetin. CONCLUSIONS: These data demonstrate that genistein, resveratrol, and quercetin have antiproliferative effects on breast cancer cells. Their induction of apoptosis involves the activation of both the intrinsic and extrinsic apoptotic pathways, which may be related to the differential affinity to ERα and ERß. Whether phytoestrogens have similar effects on normal breast cells remains to be examined.


Asunto(s)
Apoptosis/efectos de los fármacos , Caspasa 3/metabolismo , Proliferación Celular/efectos de los fármacos , Genisteína/farmacología , Quercetina/farmacología , Estilbenos/farmacología , Neoplasias de la Mama/metabolismo , Estradiol/metabolismo , Proteína Ligando Fas/metabolismo , Femenino , Humanos , Células MCF-7 , Mitocondrias/metabolismo , Fosfatidilinositol 3-Quinasas/metabolismo , Fitoestrógenos/farmacología , Proteínas Proto-Oncogénicas c-akt/metabolismo , Resveratrol , Transducción de Señal/efectos de los fármacos
10.
Climacteric ; 17(4): 377-84, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24228746

RESUMEN

OBJECTIVE: To explore the effect and pathway of phthalates on the growth of MCF-7 breast cancer cells. METHODS: MCF-7 cells were treated with benzyl butyl phthalate (BBP), di-n-butyl phthalate (DBP), and di-2-ethylhexyl phthalate (DEHP) (10(-10)-10(-4) mol/l). After incubation for 24, 48, 72, and 92 h, the cells were harvested and extracted for 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The proteins involving proliferative and apoptotic pathways were evaluated by Western blot analysis. RESULTS: MTT assay revealed cell toxicity at more than 10(-5) mol/l for DEHP and at 10(-4) mol/l for both BBP and DBP in MCF-7 cells. Cell proliferation was significantly increased at 10(-8)-10(-5) mol/l of BBP and DBP, and at 10(-8)-10(-6) mol/l of DEHP treatment. Proliferating cell nuclear antigen (PCNA) was substantially increased in cultures with DEHP (10(-8)-10(-6) mol/l), BBP (10(-8)-10(-5) mol/l), and DBP (10(-7)-10(-5) mol/l). Obvious increases in PI3K, p-AKT, and PCNA were noted in cultures with 17ß-estradiol, BBP, DBP, and DEHP. Estrogen receptor α expression was also notably increased in treatment with estradiol, BBP, DBP, and DEHP. CONCLUSIONS: The present study demonstrates that, even at a very low concentration, BBP, DBP, and DEHP were not only still capable of inducing a proliferative effect through the PI3K/AKT signaling pathway but also displaying estrogenic activity. Therefore, the current reference doses for phthalates defined by governments should be further evaluated.


Asunto(s)
Apoptosis/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Dibutil Ftalato/farmacología , Dietilhexil Ftalato/farmacología , Estrógenos/farmacología , Ácidos Ftálicos/farmacología , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Células MCF-7 , Fosfatidilinositol 3-Quinasas/análisis , Fosfatidilinositol 3-Quinasas/metabolismo , Plastificantes/farmacología , Antígeno Nuclear de Célula en Proliferación/análisis , Antígeno Nuclear de Célula en Proliferación/metabolismo , Proteínas Proto-Oncogénicas c-akt/análisis , Proteínas Proto-Oncogénicas c-akt/metabolismo , Transducción de Señal/efectos de los fármacos , Teratógenos/farmacología
11.
Pharmazie ; 68(1): 5-11, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-23444773

RESUMEN

The study of rare genetic diseases usually inspires the research of cancer biology. Fanconi anemia (FA), is a rare cancer susceptibility syndrome with an incidence of only 1 per 350,000 births. FA is an autosomal recessive disease with three main features: chromosome instability, hypersensitivity to DNA cross-linking agents such as mitomycin C (MMC), cisplatin and so on, and susceptible to a number of cancer types, mainly leukemia and squamous cell carcinomas of the head and neck or gynecologic system. DNA crosslinking agents may led to DNA cross-linking lesion, and Fanconi anemia pathway plays a key role in repairing its cross-linking. However, FA pathway is closely linked with carcinogenesis and tumor drug resistance. This paper mainly focuses on the FA pathway and its progress in cancer research.


Asunto(s)
Reparación del ADN/genética , ADN/genética , Proteínas del Grupo de Complementación de la Anemia de Fanconi/genética , Anemia de Fanconi/genética , Transducción de Señal/genética , Reactivos de Enlaces Cruzados , Humanos , Neoplasias/genética , Transducción de Señal/fisiología , Ubiquinona/metabolismo
12.
Climacteric ; 16(1): 154-60, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22642912

RESUMEN

OBJECTIVE: To determine whether estrogen regulates mesenchymal stem cell (MSC) activity in bone marrow from osteoporotic postmenopausal women. METHODS: MSCs were collected from bone marrows which were aspirated simultaneously during iliac bone graft procedures in spine fusion surgery in osteoporotic postmenopausal women. We investigated proliferation, differentiation, osteogenic activity, and estrogen receptor (ER) α and ß mRNA expression of primary culture MSCs isolated from four osteoporotic postmenopausal women, treated in vitro with or without 17ß-estradiol. The expression of alkaline phosphatase (ALP), osteocalcin, interleukin-6, ERα and ERß mRNA was evaluated. RESULTS: The expression of ALP and osteocalcin mRNA was detected during the cultures of MSCs and was observed to increase up to day 20. As compared with MSCs not treated with estradiol, a significant increase in DNA content, ERα mRNA, and ALP mRNA expression was observed in cultures with estradiol. The mRNA expression of osteocalcin and interleukin-6 was significantly lower in MSCs treated with estradiol than those without estradiol. There was no significant difference in the mRNA expression of ERß between MSCs cultured with and without estradiol. CONCLUSIONS: In the proper environment, MSCs from osteoporotic women can differentiate into osteoblasts and estrogen enhances the osteogenic activity possibly via ERα activity.


Asunto(s)
Estradiol/farmacología , Receptor alfa de Estrógeno/metabolismo , Receptor beta de Estrógeno/metabolismo , Estrógenos/farmacología , Expresión Génica/efectos de los fármacos , Células Madre Mesenquimatosas/efectos de los fármacos , Osteogénesis/efectos de los fármacos , ARN Mensajero/metabolismo , Anciano , Fosfatasa Alcalina/genética , Diferenciación Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Receptor alfa de Estrógeno/genética , Receptor beta de Estrógeno/genética , Femenino , Humanos , Interleucina-6/genética , Persona de Mediana Edad , Osteocalcina/genética , Osteoporosis Posmenopáusica/metabolismo , Cultivo Primario de Células
13.
Plant Dis ; 96(3): 416-422, 2012 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-30727143

RESUMEN

Sterol 14α-demethylase inhibitors (DMIs) continue to be important in the management of brown rot of Monilinia spp. worldwide. In this study, the sensitivity of 100 Monilinia fructicola isolates from four unsprayed orchards and two packinghouses in Beijing, China, to the new DMI fungicide SYP-Z048 was evaluated and ranged from 0.003 to 0.039 and 0.016 to 0.047 µg/ml, respectively. Laboratory mutants resistant to SYP-Z048 were generated using UV irradiation but no mutants occurred spontaneously. Resistance was stable after 10 weekly consecutive transfers on fungicide-free medium. Three parameters, including growth rate, sporulation in vitro, and lesion area, were significantly different when sensitive isolates and resistant mutants were analyzed as groups. Mutants grew more slowly and developed significantly smaller lesions on detached fruit, and their sporulation ability in vitro was reduced. Cross resistance was found between SYP-Z048 and propiconazole (ρ = 0.82, P < 0.0001) but not between SYPZ048 and tridemorph, carbendazim, procymidone, azoxystrobin, or pyrimethanil. SYP-Z048 resistance in mutants exhibiting 50% mycelial growth inhibition values greater than 0.3 µg/ml was correlated with the presence of a mutation in the CYP51 gene that encodes the target protein for DMI fungicides. The mutation caused an amino acid change from tyrosine to phenylalanine at position 136 (Y136F). To our knowledge, this is the first baseline sensitivity of M. fructicola collected from China to a DMI fungicide. The inability of M. fructicola to generate spontaneous DMI-resistant mutants coupled with reduced fitness of Y136F mutants can explain why this target site mutation has not yet emerged as a DMI fungicide resistance determinant in M. fructicola field populations worldwide.

14.
Climacteric ; 14(3): 345-51, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21375453

RESUMEN

OBJECTIVE: To examine the effect of progestogens currently used in hormone therapy on growth of human breast tumor cells. METHODS: MCF-7 cells were incubated in 10 nmol/l progestogens, including progesterone (P4), medroxyprogesterone acetate (MPA), norethisterone acetate (NETA), and cyproterone acetate (CPA), with or without 17ß-estradiol (E(2), 1 nmol/l and 10 nmol/l), as well as E(2) alone. Cell proliferation, apoptosis, and the expression of caspase-3 and proliferating cell nuclear antigen (PCNA) were evaluated. RESULTS: The ratios of apoptosis : proliferation significantly increased in cultures with progestogens alone, 1 nmol/l E(2) plus progestogens (except P4), and 10 nmol/l E(2) plus NETA. Caspase-3 significantly diminished in cultures with E(2) alone; this was completely reversed when progestogens were added. MPA alone or with 1 nmol/l E(2) and 10 nmol/l E(2) plus NETA significantly increased caspase-3. Using progestogens alone, except P4, significantly decreased PCNA expression. CONCLUSIONS: The results demonstrate that various progestogens have different effects on growth of breast tumor cells, especially with the combined usage of E(2). Progestogen-induced apoptosis may be partly inhibited with the presence of E(2), but less severe with lower E(2) concentrations. Therefore, the choice of progestogens, as well as the doses of E(2) and/or progestogen, may influence breast cancer risk.


Asunto(s)
Antineoplásicos Hormonales/farmacología , Apoptosis/efectos de los fármacos , Neoplasias de la Mama/tratamiento farmacológico , Proliferación Celular/efectos de los fármacos , Estradiol/farmacología , Progestinas/farmacología , Antineoplásicos Hormonales/metabolismo , Antineoplásicos Hormonales/uso terapéutico , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Caspasa 3/metabolismo , Línea Celular Tumoral , Estradiol/metabolismo , Estradiol/uso terapéutico , Femenino , Humanos , Progestinas/metabolismo , Progestinas/uso terapéutico
15.
Plant Dis ; 95(11): 1481, 2011 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30731760

RESUMEN

Botrytis cinerea Pers.:Fr., is a necrotrophic fungus with a broad host range that causes gray mold on hundreds of plant species (2). Control of gray mold mainly depends on fungicides, including the dicarboxamide iprodione. Thirty-nine diseased blackberry fruit were collected from four orchards in South Carolina and the sensitivity of single-spore isolates to iprodione was examined by Spiral Plater assays (1) on potato dextrose agar (PDA). Briefly, a 5.3 cm long paper strip containing mycelia was placed along the concentration gradient of the PDA and 50% inhibition (EC50 value) was calculated after 2 days of incubation with the Spiral Gradient Endpoint (SGE) software (Spiral Biotech, Norwood, MA). Each isolate was tested in duplicates. Sensitivity ranged from 0.043 to 2.596 µg/ml, with a maximum resistance factor of 60.4. Isolates with EC50 values greater than 2 µg/ml were found in two orchards. Those isolates represented 40 and 7.1% of the total isolates from each orchard. Two isolates with high (EC50 value of 2.596 µg/ml) and low (EC50 value of 0.062 µg/ml) values were chosen to determine the efficacy of iprodione formulated product Rovral 4 Fl (Bayer CropSciences, Research Triangle Park, NC) on detached apple fruit. Fifteen apples were used for each isolate and experiment. Each fruit was wounded on the surface in three locations with a sterile syringe and inoculated with 15 µl of a spore suspension (106 conidia/ml) at the wounded sites. Rovral was applied at the recommended label rate either 24 h before (protective treatment) or 48 h after inoculation (curative treatment). The experiment was conducted three times. Blackberry fruit were not found suitable for this assay because of persistent contamination problems likely from latent infections of a symptomatic fruit. Disease incidence and lesion diameter were recorded 7 days after incubation. Disease incidence following inoculation of the sensitive and resistant isolates on non-fungicide-treated fruit was 100 and 86.7%, respectively. Disease incidence on fungicide-treated apples was 4.4% for the sensitive isolate and 75.6% for the resistant isolate with corresponding mean lesion areas of 0.36 mm and 9.37 mm, respectively. Both isolates were controlled effectively in protective treatments, however, indicating low levels of resistance. To our knowledge, this is the first report of iprodione resistance in B. cinerea from blackberry or any other field-grown crop in South Carolina. This finding adds to a study from 1999 (3) documenting resistance to the dicarboxamide fungicide vinclozolin in B. cinerea collected from ornamentals in South Carolinian greenhouses and suggests that resistance to iprodione needs to be considered in the design of gray mold control strategies in commercial blackberry orchards. No cross resistance between the phenylpyrrole fludioxonil and iprodione was found. References: (1) H. Forster et al. Phytopathology 94:163, 2004. (2) B. Williamson et al. Mol. Plant Pathol. 8:561. 2007. (3) L. F. Yourman and S. N. Jeffers. Plant Dis. 83:569, 1999.

16.
Dig Liver Dis ; 41(9): 683-9, 2009 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-19185551

RESUMEN

BACKGROUND: Neonatal intrahepatic cholestasis caused by citrin deficiency (NICCD) is a novel inborn error of metabolism due to dysfunction of citrin protein, and much more information about this new disease is still needed for its clinical management. AIMS: To investigate in detail the clinical and laboratory features of NICCD. PATIENTS: 13 NICCD subjects in mainland of China diagnosed in our department since 2006. METHODS: The anthropometric parameters of the patients at birth were compared with controls, representative biochemical changes and metabolome findings were investigated cross-sectionally, and mutations in the causative gene SLC25A13 were analyzed by protocols established previously. RESULTS: The patients showed reduced birth weight, length and ponderal index. Main clinical manifestations consisted of jaundice, hepato/hepatosplenomegaly and steatohepatosis on ultrasonography. Biochemical analysis revealed intrahepatic cholestasis, delayed switch of AFP to albumin, and elevated triglyceride, total cholesterol and LDL-cholesterol together with reduced HDL-cholesterol. Metabolome findings included co-existence of markers for galactosemia and tyrosinemia in urine, and elevated Cit, Met, Thr, Tyr, Lys, Arg and Orn in blood. Mutations of 851-854del, IVS6+5G>A, 1638-1660dup, A541D, IVS16ins3kb, R319X and G333D were detected in the gene SLC25A13. CONCLUSIONS: The diagnosis of NICCD cannot be established based just on the numerous but non-specific clinical manifestations and biochemical changes. The relatively specific metabolome features provide valuable tools for its screening and diagnosis, while SLC25A13 mutation analysis should be taken as one of the reliable tools for the definitive diagnosis. The body proportionality at birth, steatohepatosis on ultrasonography, delayed switch of AFP to albumin, dyslipidemia pattern, urinary metabolome features and the novel mutation G333D expanded the clinical spectrum of NICCD.


Asunto(s)
Proteínas de Unión al Calcio/deficiencia , Colestasis Intrahepática/etiología , Errores Innatos del Metabolismo/complicaciones , Proteínas de Transporte de Membrana Mitocondrial/genética , Transportadores de Anión Orgánico/deficiencia , Estudios de Casos y Controles , China , Colestasis Intrahepática/epidemiología , Colestasis Intrahepática/genética , Colestasis Intrahepática/orina , Estudios Transversales , Femenino , Retardo del Crecimiento Fetal/epidemiología , Humanos , Lactante , Recién Nacido , Masculino , Errores Innatos del Metabolismo/orina , Mutación
17.
BJOG ; 114(12): 1580, e1-7, 2007 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-17995500

RESUMEN

BACKGROUND: Currently, there are a number of clinical trials, but no international collaboration for collating research on effectiveness of laparoscopic uterosacral nerve ablation (LUNA) for alleviating chronic pelvic pain. OBJECTIVE: Meta-analysis was used by collecting individual patient data (IPD) from the existing trials, to provide a comprehensive assessment of the effectiveness of LUNA that will be generalisable in various clinical contexts. METHODS: IPD will be sought and collected from all relevant (both already finished and continuing) randomised trials identified through previous systematic reviews. After obtaining raw data and cleaning the database, analysis will be of all patients ever randomised based on the intention-to-treat principle using endpoints measured at 12 months following randomisation. PROPOSAL: We will update searches, contact all authors, obtain data in whatever form it can be provided, build a single database, produce results for individual studies, have them verified by original authors, explore of any heterogeneity and reasons behind it and finally pool all raw data in to a meta-analysis using appropriate statistical methods. The project will test the effectiveness of LUNA for women with chronic pelvic pain. It will also motivate collaborating primary investigators to undertake new primary studies to corroborate or improve upon the conclusions derived from the retrospective analysis.


Asunto(s)
Ablación por Catéter/métodos , Laparoscopía/métodos , Dolor Pélvico/cirugía , Enfermedad Crónica , Femenino , Humanos , Ensayos Clínicos Controlados Aleatorios como Asunto , Sacro/inervación , Resultado del Tratamiento , Útero/inervación
18.
Allergy ; 61(11): 1316-8, 2006 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-17002708

RESUMEN

BACKGROUND: The evaluation of Chinese herbal medicines (CHM) to allergic rhinitis (AR) by large-scale pharmaco-epidemiological study is not ease found, although CHM had been reported to have potential effect for AR in some clinical trials. AIMS OF THE STUDY: To explore the frequency and pattern of CHM prescriptions on AR, we have the study by analysing the population-based CHM database in Taiwan. METHODS: The way for this study was linked and processed the complete traditional Chinese medicine database for Taiwanese recorded in the year 2002. The diagnosis of AR was extracted with the only single ICD-9 Code of 477 to calculate the frequency and pattern of prescriptions. Association rule was applied to analyse co-prescription of CHM for patients with AR. RESULTS: In the year 2002, among the 22 520 776 valid beneficiaries of the National Health Insurance, Taiwan, 914 612 subjects (3.8% of the total valid beneficiaries) have diagnosed AR. There were 35.6% of AR patients been treated by CHM. The peak age of AR patients treated by CHM was at the first decade (0-10). For the AR patients, the most common Chinese herbal formula prescription was Shin-yi-qing-fei-tang, or Angelica dahurica (Bai-zhi) for the single Chinese herb. While for the combination treatments the most common prescription was the two formulae, Xiao-qing-long-tang and Shin-yi-san. CONCLUSIONS: Because of the high utilization rate of the CHM treatment for AR, a large-scale randomized trial warrants further research for its efficacy and safety.


Asunto(s)
Prescripciones de Medicamentos , Medicamentos Herbarios Chinos/uso terapéutico , Rinitis Alérgica Perenne/tratamiento farmacológico , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Preescolar , Estudios Epidemiológicos , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Persona de Mediana Edad , Taiwán/epidemiología
19.
Int J Gynaecol Obstet ; 86(3): 411-6, 2004 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-15325870

RESUMEN

OBJECTIVE: A ruptured cornual pregnancy is a rare and challenging problem. We present two cases of cornual pregnancies after in vitro fertilization and embryo transfer (IVF-ET) treated by cornual resection, with an excellent perinatal outcome for the intrauterine pregnancy in both cases. A literature review of cornual pregnancy after IVF-ET is also included. CASE REPORTS: Two women had undergone IVF-ET because of tubal problems. Emergent laparotomy was performed because of internal bleeding at 12 weeks of gestation in one case and 17 weeks in the other, and in both cases, ruptured cornual pregnancies were found. Cornual resection and primary repair were performed. The women were discharged on the 6th and 7th postoperative day, respectively, and they underwent an elective cesarean delivery at 37 weeks of pregnancy. They were delivered of healthy babies, one weighing 2700 g and the other 2310 g. CONCLUSION: These cases illustrate that good perinatal outcomes can be achieved by surgical intervention in heterotopic pregnancies, even in the event of a ruptured cornu.


Asunto(s)
Transferencia de Embrión/efectos adversos , Fertilización In Vitro/efectos adversos , Embarazo Ectópico/etiología , Rotura Uterina/etiología , Adulto , Femenino , Humanos , Laparoscopía , Embarazo , Embarazo Ectópico/complicaciones , Embarazo Ectópico/diagnóstico , Embarazo Ectópico/cirugía , Rotura Uterina/diagnóstico , Rotura Uterina/cirugía , Útero/cirugía
20.
Prenat Diagn ; 21(12): 1031-3, 2001 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11746160

RESUMEN

We report on the prenatal diagnosis of ring chromosome 15 in a fetus with increased nuchal fold and intrauterine growth restriction (IUGR). A 27-year-old woman gravida 2, para 1 had normal maternal serum screen tests in the early second trimester of the index pregnancy. Fetal nuchal fold thickening up to 8 mm was incidentally found during the routine obstetric ultrasound scan at 20 weeks' gestation. Amniocentesis was undertaken and the fetal karyotype was found to be 46,XY,r(15) on cytogenetic study. Fluorescence in situ hybridization (FISH) using a telomeric probe of chromosome 15 demonstrated a terminal deletion on the q arm of the ring-shaped chromosome 15. This is the first report of a prenatally diagnosed case of ring chromosome 15. Moreover, nuchal fold thickness in the second trimester may have a role in its prenatal diagnosis.


Asunto(s)
Cromosomas Humanos Par 15 , Cuello/diagnóstico por imagen , Cuello/embriología , Cromosomas en Anillo , Ultrasonografía Prenatal , Aborto Inducido , Adulto , Amniocentesis , Femenino , Retardo del Crecimiento Fetal/diagnóstico por imagen , Retardo del Crecimiento Fetal/genética , Eliminación de Gen , Edad Gestacional , Humanos , Hibridación Fluorescente in Situ , Cariotipificación , Masculino , Embarazo
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