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2.
Osteoporos Int ; 27(9): 2855-2865, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27172935

RESUMEN

UNLABELLED: Medication persistence and adherence are critical for osteoporosis outcomes. Using the Taiwan National Health Insurance Research Database, we found that persistence and adherence to teriparatide were low in Taiwanese patients with osteoporosis and that greater persistence and adherence were associated with a lower incidence of hip and other nonvertebral fractures. INTRODUCTION: The purpose of this study was to determine the persistence and adherence to teriparatide treatment in Taiwanese patients with osteoporosis, and to examine the association between persistence and adherence to teriparatide with fracture risks. METHODS: Medical and pharmacy claims for 4,692 patients with vertebral or hip fractures and teriparatide prescriptions between 2005 and 2008 were identified (Taiwan National Health Insurance Research Database). Persistence was the time from the start of treatment to the first 90-day gap between two teriparatide prescriptions. Adherence was the number of teriparatide pens (each pen is used over 1 month) prescribed over 24 months. Association of persistence and adherence to teriparatide with fracture incidence was assessed using adjusted Cox proportional hazards models. RESULTS: The proportion of patients persisting with teriparatide for >6 months and >12 months was 44.6 and 24.9 %, respectively. Over 24 months, 53.6 % of patients were adherent for >6 months and 33.9 % were adherent for >12 months. Patients persisting for >12 months had a significantly lower incidence of hip (adjusted hazard ratio [HR], 0.61 [95 % confidence interval (CI), 0.40-0.93], P = 0.0229) and nonvertebral fracture (HR, 0.79 [95 % CI, 0.63-0.99], P = 0.0462) compared with those who persisted for ≤12 months. Patients adherent for >12 months had a lower incidence of hip (HR, 0.66 [95 % CI, 0.46-0.96], P = 0.0286) and nonvertebral fracture (HR, 0.81 [95 % CI, 0.66-0.99], P = 0.0377) compared with those adherent for ≤12 months. CONCLUSIONS: Persistence and adherence to teriparatide over 24 months were low in Taiwanese patients with osteoporosis; greater adherence and persistence were associated with a lower incidence of nonvertebral fractures.


Asunto(s)
Conservadores de la Densidad Ósea/uso terapéutico , Fracturas Óseas/epidemiología , Cumplimiento de la Medicación , Teriparatido/uso terapéutico , Anciano , Anciano de 80 o más Años , Femenino , Fracturas Óseas/prevención & control , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Programas Nacionales de Salud , Taiwán/epidemiología
3.
Int J Cosmet Sci ; 38(3): 319-24, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-26663436

RESUMEN

OBJECTIVE: The seed coat of black soya bean (SCBS) contains high amount of anthocyanins and shows antioxidant and anti-mushroom tyrosinase activities. The objectives of this study were to analyse the anthocyanins in SCBS with different solvents and to find the relationship between anthocyanin profile with anti-human and anti-mushroom tyrosinase activities. METHODS: SCBS was extracted with hot water, 50 and 80% ethanol, 50 and 80% acetone and 50 and 80% acidified acetone. Total phenol and total flavonoid contents in the extracts were determined. Anthocyanins in the extracts were analysed using HPLC and LC/MS/MS. A genetically engineered human tyrosinase was used to evaluate the anti-tyrosinase potential of the extracts from SCBS. RESULTS: 80% acetone extract from SCBS obtained the highest total phenol, total flavonoid and cyanidin-3-O-glucoside (C3G) contents among all the extracts, whereas the hot water extract showed the lowest antioxidant contents. Three anthocyanin compounds were found in all the extracts from SCBS, and the analysis of HPLC and LC/MS/MS indicated that they were C3G, delphinidin-3-O-glucoside (D3G) and peonidin-3-O-glucoside (P3G). The ratios of C3G (2.84 mg g(-1) ), D3G (0.34 mg g(-1) ) and P3G (0.35 mg g(-1) ) in 80% acidified acetone extract were 76.6, 9.1 and 9.3%, respectively. All the extracts from SCBS possessed anti-human tyrosinase activity. Moreover, a good correlation was found between the anti-human tyrosinase activities and C3G contents in the extracts. CONCLUSION: Antioxidants in SCBS also possess anti-human and anti-mushroom tyrosinase activities.


Asunto(s)
Antocianinas/análisis , Antioxidantes/farmacología , Glycine max/embriología , Monofenol Monooxigenasa/antagonistas & inhibidores , Extractos Vegetales/farmacología , Semillas/química , Humanos
4.
Diabet Med ; 32(11): 1460-9, 2015 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-25970814

RESUMEN

AIM: To compare the cardiovascular risks associated with second-line oral antidiabetic agents added to initial metformin therapy in a large nationwide observational study. METHODS: We conducted a nationwide retrospective cohort study using the Taiwan National Health Insurance database. A total of 36 118 users of different add-on oral antidiabetic agents (sulphonylureas, glinides, pioglitazone, α-glucosidase inhibitors and dipeptidyl peptidase-4 inhibitors) after initial metformin therapy were included in the analysis. The reference group was sulphonylureas added to metformin, the most commonly used combination regimen. The main outcomes of interest were hospitalizations for any cardiovascular event including acute myocardial infarction, congestive heart failure and ischaemic stroke. In the main analysis, all patients were followed within their initiation groups until the study end, disregarding any changes in treatment status over time. RESULTS: In intention-to-treat analyses, there was no difference in the risk of any cardiovascular event among the add-on combination treatment groups, but significantly lower risks of acute myocardial infarction were found for the glinides plus metformin treatment group (crude hazard ratio 0.52, adjusted hazard ratio 0.39; 95% CI 0.20-0.75) and for the α-glucosidase inhibitors plus metformin treatment group (crude hazard ratio 0.63, adjusted hazard ratio 0.54; 95% CI 0.31-0.95). No difference in risk of congestive heart failure or ischaemic stroke risk was found among the combination treatment groups. In secondary as-treated analyses, similar but less significant associations were found as compared with the primary intention-to-treat analyses for all treatment groups. CONCLUSION: There were no differences in overall cardiovascular risks among several add-on second-line oral antidiabetic agents; however, glinide plus metformin and α-glucosidase inhibitors plus metformin combination therapies might be associated with lower risks of acute myocardial infarction.


Asunto(s)
Enfermedades Cardiovasculares/prevención & control , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Angiopatías Diabéticas/prevención & control , Cardiomiopatías Diabéticas/prevención & control , Hipoglucemiantes/uso terapéutico , Metformina/uso terapéutico , Administración Oral , Enfermedades Cardiovasculares/complicaciones , Enfermedades Cardiovasculares/epidemiología , Estudios de Cohortes , Diabetes Mellitus Tipo 2/complicaciones , Angiopatías Diabéticas/epidemiología , Cardiomiopatías Diabéticas/epidemiología , Quimioterapia Combinada , Registros Electrónicos de Salud , Femenino , Estudios de Seguimiento , Inhibidores de Glicósido Hidrolasas/administración & dosificación , Inhibidores de Glicósido Hidrolasas/uso terapéutico , Humanos , Hipoglucemiantes/administración & dosificación , Masculino , Metformina/administración & dosificación , Persona de Mediana Edad , Infarto del Miocardio/complicaciones , Infarto del Miocardio/epidemiología , Infarto del Miocardio/prevención & control , Programas Nacionales de Salud , Estudios Retrospectivos , Riesgo , Taiwán/epidemiología
5.
J Small Anim Pract ; 53(11): 652-6, 2012 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-23020198

RESUMEN

OBJECTIVE: To determine whether or not dogs develop a deficiency of ascorbic acid during hospitalisation in an intensive care unit. METHODS: Blood samples were collected daily for up to three days from dogs hospitalised in an intensive care unit for 36 to 72 hours (n = 16) or ê72 hours (n = 20) and from healthy dogs (n = 13). Plasma total ascorbic acid concentrations were measured using a colorimetric method involving a reaction between ascorbic acid, 2,6 dichlorophenol-indophenol, thiourea and dinitrophenyl hydrazine. Additionally, clinical data were recorded for each patient. RESULTS: Dogs hospitalised for ê72 hours had significantly greater plasma ascorbic acid concentrations on day 3 compared to days 1 and 2. There was no difference in plasma ascorbic acid concentrations between days 1 and 2 for dogs hospitalised for 36 to 72 hours. Plasma ascorbic acid concentrations were significantly greater for each day of sampling for the hospitalised dogs compared to the control dogs. CLINICAL SIGNIFICANCE: Plasma ascorbic acid concentrations appear to increase during hospitalisation, and supplementation may not be indicated in dogs hospitalised in an intensive care unit.


Asunto(s)
Deficiencia de Ácido Ascórbico/veterinaria , Enfermedades de los Perros/epidemiología , Hospitales Veterinarios/estadística & datos numéricos , Animales , Ácido Ascórbico/sangre , Deficiencia de Ácido Ascórbico/epidemiología , Colorimetría/veterinaria , Perros/sangre , Femenino , Masculino , Índice de Severidad de la Enfermedad
6.
Acta Anaesthesiol Scand ; 56(7): 896-903, 2012 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-22571393

RESUMEN

BACKGROUND: We investigated the cardioprotective effects of isoflurane administered at the onset of reperfusion in senescent rat in vivo, and the activation of the reperfusion injury salvage kinase (RISK) pathway to address a possible mechanism underlying age-related differences. METHODS: Male Wistar rats were assigned to age groups (young, 3-5 months; old, 20-24 months), and randomly selected to receive isoflurane (1 minimum alveolar concentration) or not for 3 min before and 2 min after reperfusion (ISO postC). Rats were subjected to coronary occlusion for 30 min followed by 2 h of reperfusion. Western blot analysis was used to assess the phosphorylation of extracellular signal-regulated kinase (ERK1/2), Akt, and GSK3ß 15 min after reperfusion. RESULTS: Brief administration of isoflurane 3 min before and 2 min after the initiation of early reperfusion reduced infarct size (56 ± 8% of left ventricular area at risk, mean ± standard deviation) compared with controls (68 ± 4%) in young rats, but had no effect in old rats (56 ± 8% in ISO postC and 56 ± 10% in control, respectively). Phosphorylation of ERK1/2, Akt, and GSK3ß were increased in the young ISO postC group but not in the old ISO postC group compared with control groups of the respective ages. CONCLUSIONS: We demonstrated that isoflurane post-conditions the heart in young but not in senescent rats. Failure to activate RISK pathway may contribute to attenuation of isoflurane-induced post-conditioning effect in senescent rats.


Asunto(s)
Envejecimiento/fisiología , Cardiotónicos/uso terapéutico , Glucógeno Sintasa Quinasa 3/fisiología , Poscondicionamiento Isquémico/métodos , Isoflurano/uso terapéutico , Sistema de Señalización de MAP Quinasas , Proteína Quinasa 1 Activada por Mitógenos/fisiología , Proteína Quinasa 3 Activada por Mitógenos/fisiología , Daño por Reperfusión Miocárdica/prevención & control , Proteínas Proto-Oncogénicas c-akt/fisiología , Animales , Cardiotónicos/farmacología , Evaluación Preclínica de Medicamentos , Glucógeno Sintasa Quinasa 3 beta , Isoflurano/farmacología , Masculino , Infarto del Miocardio/patología , Reperfusión Miocárdica , Daño por Reperfusión Miocárdica/enzimología , Daño por Reperfusión Miocárdica/fisiopatología , Fosforilación , Procesamiento Proteico-Postraduccional , Distribución Aleatoria , Ratas , Ratas Wistar
8.
Diabet Med ; 27(6): 636-43, 2010 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-20546280

RESUMEN

AIM: To evaluate annual prevalence and incidence of Type 2 diabetes and to examine possible trends among adults in Taiwan. METHODS: A retrospective nationwide longitudinal study using the Taiwan National Health Insurance Research Database collected during 1999-2004. Adult patients aged > or = 20 years old with prevalent and incident Type 2 diabetes were identified using ICD-9-CM diagnostic codes. Age-specific and age-direct-standardized annual incidence and prevalence were calculated to describe their trends in different gender and age group and compared using Poisson regression. RESULTS: During the study years, the age-standardized prevalence of Type 2 diabetes increased from 4.7 to 6.5% for men and from 5.3 to 6.6% for women. The increasing trends in prevalence were significant and higher among people aged < 40 and > or = 80 years. The age-standardized incidence rates of Type 2 diabetes per 1000 person-years were approximately 7.6 and remain stable for men, but decreasing from 7.7 to 6.9 for women. However, the incidence increased significantly in younger adults aged < 40 years whose relative incidence (RI with 95% confidence interval) was 1.31 (1.20-1.42) for men and 1.04 (1.01-1.08) for women. The incidence trends for people aged > or = 40 years were decreased for men and women. The differences in incidence trends between age groups and between genders were all statistically significant (all P < 0.001). CONCLUSIONS: This study demonstrated a substantial increasing trend in Type 2 diabetes prevalence during 1999-2004 among adults in Taiwan. Despite the incidence decreased in older people, young men aged 20-40 years were most susceptible to higher incidence of Type 2 diabetes.


Asunto(s)
Bases de Datos Factuales , Diabetes Mellitus Tipo 2/epidemiología , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Programas Nacionales de Salud , Prevalencia , Estudios Retrospectivos , Estadística como Asunto , Taiwán/epidemiología , Adulto Joven
9.
Clin Nephrol ; 72(4): 298-302, 2009 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-19825336

RESUMEN

AIM: The incidence and prevalence of end-stage renal disease (ESRD) are extremely high in Taiwan. It is an interesting fact that both the husband and wife in some families of Taiwan suffer from ESRD. Therefore, we attempted to identify the potential risk factors of such couples. METHODS: This is a retrospective observational study. Six couples receiving maintenance dialysis in our hospital from 1996 to 2006 were enrolled in this study. Detailed medical history; drugs history including over-the-counter drugs (OCD), analgesics and herbal remedies; occupational history and onset of transitional cell carcinoma (TCC) were recorded. These data are correlated with pre-dialysis laboratory findings. The outcomes of dialysis and TCC were also recorded and analyzed. RESULTS: Two males were Chinese herbal medicine practitioners. All the patients (12/12) had taken Chinese herbs and most of them (10/12) had also taken OCD (especially cold remedies and analgesics). We found all of them had bilateral contracted kidneys, mild proteinuria and trace glucosuria. One patient's renal biopsy revealed Chinese herb nephropathy. Four patients (33%) suffered from TCC. Three patients expired during follow up due to hyperkalemia, extensive TCC and suicide, respectively. CONCLUSIONS: The prevalence of Chinese herbs or compound analgesics abuse is high in couples with ESRD. The clinical features and high incidence of TCC are compatible with drug related chronic tubulointerstitial nephritis. Abuse of offending agents should be considered as a risk factor in family members with ESRD.


Asunto(s)
Medicamentos Herbarios Chinos/toxicidad , Fallo Renal Crónico/inducido químicamente , Esposos , Adulto , Anciano , Femenino , Humanos , Fallo Renal Crónico/epidemiología , Masculino , Persona de Mediana Edad , Factores de Riesgo , Taiwán/epidemiología
10.
Bone Marrow Transplant ; 29(1): 41-9, 2002 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-11840143

RESUMEN

The need for a culturally sensitive instrument to assess quality of life (QOL) of patients in international oncology clinical trials has been well documented. This study was designed to evaluate the psychometric properties of the traditional Chinese translation (TCHI) of the Functional Assessment of Cancer Therapy-Bone Marrow Transplant (FACT-BMT) Version 4. The FACT-BMT consists of the FACT-General and treatment-specific concerns of bone marrow transplantation. The Chinese translation follows the standard Functional Assessment of Chronic Illness Therapy (FACIT) translation methodology. Bilingual teams from the United States and Hong Kong reviewed the translation to develop a provisional TCHI FACT-BMT, which was then pre-tested by interviewing 20 native Chinese-speaking BMT patients in Hong Kong. The pre-test results indicated good content coverage and overall comprehensibility. A refined translation, taking into account patient comments, was validated by 134 BMT patients in Hong Kong. The results indicated the high internal consistency of the TCHI FACT-BMT scales, with Cronbach's alpha coefficients ranging from 0.71 (emotional well-being) to 0.92 (FACT-BMT total). The FACT-BMT also demonstrated good construct validity when correlated with SF-36 Health Survey scales. The QOL of Chinese BMT patients can now be evaluated using a well-validated international QOL instrument in their own language.


Asunto(s)
Trasplante de Médula Ósea , Neoplasias/terapia , Calidad de Vida/psicología , Adolescente , Adulto , Anciano , China , Comparación Transcultural , Femenino , Humanos , Cooperación Internacional , Lenguaje , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Encuestas y Cuestionarios , Traducción
11.
Clin Nephrol ; 57(2): 136-41, 2002 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-11863124

RESUMEN

BACKGROUND: Iron deficiency is the most common cause of suboptimal response to recombinant human erythropoietin (rHuEPO) in chronic hemodialysis (HD) patients. Iron supply can correct this situation, however, optimal dosage, route of administration, and monitoring of iron status during rHuEPO therapy in maintenance HD patients remains controversial. METHODS: We conducted a 12-month intravenous iron substitution trial in 149 iron-replete chronic HD patients receiving subcutaneous rHuEPO therapy. The available iron pool was maintained with 100 mg iron every 2 weeks or 1 month depending on serum ferritin and transferrin saturation levels, the rHuEPO dosage titrated depending on hematocrit (Hct) levels. RESULTS: After 12-month protocol, the Hct increased (28.7 +/- 4.1 vs 27.7 +/- 2.6, p = 0.003), rHuEPO requirement reduced 25% (46.1 +/- 28.9 vs 61.5 +/- 67.8 U/kg/week, p = 0.006), serum ferritin increased (1,383 +/- 727 vs 930 +/- 857 ng/ml, p < 0.001), so did the transferrin saturation (36.1 +/- 12.7 vs 27.5 +/- 12.8%, p < 0.001). The serum albumin decreased slightly but reached statistical significance (4.1 +/- 0.48 vs 4.2 +/- 0.36 g/dl, p = 0.006), so did the cholesterol levels (166 +/- 41 vs 173 +/- 38 mg/dl, p = 0.044) and pre-dialysis creatinine (11.3 +/- 2.3 vs 11.5 +/- 2.4 mg/dl, p = 0.015). Besides, the iPTH levels did not interfere with the rHuEPO dosage reduction and Hct increment in our patients. CONCLUSION: We conclude that maintaining high levels of serum ferritin and transferrin saturation could further reduce the requirement of rHuEPO in chronic HD patients, but the long-term effect of iron overloading to patients' nutritional status must be further evaluated in contrast to the economic saving.


Asunto(s)
Eritropoyetina/administración & dosificación , Compuestos Férricos/administración & dosificación , Diálisis Renal , Femenino , Ferritinas/sangre , Hematócrito , Humanos , Inyecciones Intravenosas , Masculino , Persona de Mediana Edad , Proteínas Recombinantes , Transferrina/análisis
12.
Phytomedicine ; 8(3): 213-9, 2001 May.
Artículo en Inglés | MEDLINE | ID: mdl-11417915

RESUMEN

Mung bean, adzuki bean, black bean and rice bean are foods and folk medicines of Taiwan. We evaluated the effects of various water extract concentrations (100, 500 and 1000 mg/kg body wt.) and silymarin (25 mg/kg body wt. on acetaminophen-induced liver injury by measuring serum glutamate-oxalate-transaminase (sGOT) and serum glutamate-pyruvate-transaminase (sGPT) activities in rats. The results showed that the sGOT and the sGPT activities, increased by APAP, were decreased significantly (P < 0.05) through treatment with inceasing amounts up to 1000 mg/kg body wt. of the exracts. In particular, the mung bean aqueous extract showed the best hepatoprotective effect on APAP-induced hepatotoxicity. The pathological changes of liver injury caused by APAP improved by the treatment with all of the legume extracts, which were compared to silymarin as a standardized drug. In addition to these results, the extract of mung bean acted as a potential hepatoprotective agent in dietary supply.


Asunto(s)
Medicamentos Herbarios Chinos/farmacología , Fabaceae/química , Hepatopatías/prevención & control , Hígado/efectos de los fármacos , Sustancias Protectoras/farmacología , Acetaminofén , Alanina Transaminasa/sangre , Animales , Aspartato Aminotransferasas/sangre , Enfermedad Hepática Inducida por Sustancias y Drogas , Modelos Animales de Enfermedad , Medicamentos Herbarios Chinos/uso terapéutico , Hígado/enzimología , Hígado/patología , Masculino , Medicina Tradicional China , Plantas Medicinales , Ratas , Ratas Wistar , Silimarina/farmacología , Silimarina/normas , Taiwán
13.
Histol Histopathol ; 16(1): 175-83, 2001 01.
Artículo en Inglés | MEDLINE | ID: mdl-11193193

RESUMEN

Apoptosis has been suggested to participate in stabilizing cell number in restenosis. Salvia miltiorrhiza (SM) Bunge which is a Chinese herb widely used for the treatment of cardiovascular disorders contains a potent antioxidant, Salvianolic acid B. To determine whether the antioxidant affects vascular apoptosis, the present study examined the frequency of apoptotic cell death in atherosclerotic plaques and in restenotic lesions of cholesterol-fed rabbits. New Zealand White rabbits were treated with a normal diet (normal), a 2% cholesterol diet (HC), a 2% cholesterol diet and endothelial denudation (HC-ED), a 2% cholesterol diet with 5% water-soluble extract of SM (4.8 g/Kg B.W./day) and endothelial denudation (HC-ED-SM), or with a 2% cholesterol diet containing probucol (0.6 g/kg B.W./day) and endothelial denudation (HC-ED-probucol). Apoptosis and associated cell types were examined in serial paraffin sections by in situ terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling and immunohistochemistry. The expression of p53, an apoptosis-related protein, was also examined. Apoptosis was mainly detected in the neointima of the three groups with endothelial denudation. The percentage of apoptotic cells in SM-treated group (68.5+/-5.9%) was significantly higher than that of normal (0%), HC (1.9+/-1.2%), HC-ED (46.1+/-5.4%), and probucol-treated (32.8+/-3.9%) groups. The SM treatment markedly reduced the thickness of the neointima which was mainly composed of smooth muscle cells with few macrophages. In accordance with the apoptotic cell counts, positive immunoreactivity for p53 was observed in restenotic lesions from HC-ED, SM-treated and probucol-treated groups but not in the intima of the other two groups. These results suggest that the treatment with salvianolic acid B-rich fraction of SM induces apoptosis in neointima which in turn may help prevent the neointimal thickening.


Asunto(s)
Angioplastia , Antioxidantes/farmacología , Apoptosis/efectos de los fármacos , Benzofuranos/farmacología , Plantas Medicinales/química , Animales , Antioxidantes/aislamiento & purificación , Aorta/patología , Benzofuranos/aislamiento & purificación , Recuento de Células , Colesterol en la Dieta/farmacología , ADN/análisis , ADN/aislamiento & purificación , Electroforesis en Gel de Poliacrilamida , Hiperplasia/patología , Inmunohistoquímica , Etiquetado Corte-Fin in Situ , Microscopía Electrónica , Extractos Vegetales/farmacología , Conejos , Espectrofotometría Ultravioleta , Proteína p53 Supresora de Tumor/biosíntesis
14.
Am J Nephrol ; 21(6): 441-8, 2001.
Artículo en Inglés | MEDLINE | ID: mdl-11799260

RESUMEN

BACKGROUND/AIM: Nephropathy after ingestion of Chinese herbs is known as a rapidly progressive form of interstitial renal fibrosis after a slimming regimen containing aristolochic acid that was identified first in Belgium. Intake of traditional Chinese herbal medicines is very popular in Taiwan. So we looked for similar cases in our hospital. METHODS: From 1994 to 1998, we observed 20 Taiwanese patients who underwent renal biopsy for rapidly progressive renal failure of unknown origin. The medical history of these patients gave no clue to the origin of renal impairment, except for the administration of Chinese herbs before the development of renal failure in all cases. RESULTS: Although these patients took herbal medications from various sources for different purposes, their renal biopsy specimens showed strikingly similar histological patterns: extensive paucicellular interstitial fibrosis and tubular atrophy, but the glomeruli were apparently intact. They also had similar clinical features, such as a nearly normal blood pressure, obvious anemia, insignificant edema, low-grade proteinuria, and glucosuria. The renal function declined rapidly in most cases; 15 patients underwent dialysis within 3 months of renal biopsy, and 7 patients received emergency dialysis when they first came to our hospital. On clinical and morphological grounds, the nephropathy in our patients appears similar to Chinese herb nephropathy. CONCLUSIONS: Because of the diversity of the herbal regimens used, in addition to aristolochic acid, other unidentified phytotoxins may also play a role in this particular disease entity. There is a strong relation between rapidly progressive interstitial renal fibrosis and the consumption of Chinese herbs.


Asunto(s)
Medicamentos Herbarios Chinos/efectos adversos , Nefritis Intersticial/inducido químicamente , Adulto , Progresión de la Enfermedad , Medicamentos Herbarios Chinos/uso terapéutico , Femenino , Fibrosis , Humanos , Masculino , Persona de Mediana Edad , Nefritis Intersticial/epidemiología , Nefritis Intersticial/patología , Obesidad/tratamiento farmacológico , Taiwán/epidemiología , Pérdida de Peso
15.
Biochem Biophys Res Commun ; 278(1): 106-11, 2000 Nov 11.
Artículo en Inglés | MEDLINE | ID: mdl-11071862

RESUMEN

Activation of membrane-bound guanylate cyclase GC-A by atrial natriuretic factor (ANF) may require the involvement of accessory proteins. To identify these postulated proteins, we isolated a 1. 0-kb cDNA clone from a rat brain expression library using a polyclonal antiserum against mastoparan. The 1.0-kb cDNA encodes a protein of 111 amino acids. Expression of this cDNA in COS-7 cells potentiated ANF-stimulated GC-A activity. Therefore, the 1.0-kb gene encodes a guanylate cyclase regulatory protein (GCRP). Fluorescence microscopy studies using the fusion protein of GCRP with green fluorescence protein (GFP) indicated that GCRP was present in the cytosol in PC12 cells, but translocated toward the plasma membrane in the presence of ANF. Coimmunoprecipitation experiments indicate that GCRP associates with GC-A in the presence of ANF. These results suggest that ANF induces the association of GCRP with GC-A and this association contributes to the activation of GC-A.


Asunto(s)
Guanilato Ciclasa/genética , Guanilato Ciclasa/metabolismo , Proteínas/genética , Receptores de Péptidos/genética , Secuencia de Aminoácidos , Aminoácidos/química , Animales , Secuencia de Bases , Western Blotting , Encéfalo/metabolismo , Células CHO , Células COS , Membrana Celular/metabolismo , Clonación Molecular , Cricetinae , GMP Cíclico/metabolismo , ADN Complementario/metabolismo , Relación Dosis-Respuesta a Droga , Activación Enzimática , Biblioteca de Genes , Proteínas Fluorescentes Verdes , Péptidos y Proteínas de Señalización Intercelular , Péptidos y Proteínas de Señalización Intracelular , Proteínas Luminiscentes/metabolismo , Microscopía Fluorescente , Datos de Secuencia Molecular , Células PC12 , Péptidos , Plásmidos/metabolismo , Pruebas de Precipitina , Unión Proteica , Ratas , Receptores de Enterotoxina , Receptores Acoplados a la Guanilato-Ciclasa , Proteínas Recombinantes de Fusión/metabolismo , Distribución Tisular , Translocación Genética , Venenos de Avispas/inmunología
16.
J Ethnopharmacol ; 73(1-2): 137-43, 2000 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-11025149

RESUMEN

A human hepatoma cell line, Hep G2 cells, is a reliable system for the study of alcohol-induced hepatotoxicity. In this study, we investigated the effect of an aqueous extract of Asparagus cochinchinensis(MERRIL) (Liliaceae) roots (ACAE) on ethanol (EtOH)-induced cytotoxicity in Hep G2 cells. ACAE (1-100 microg/ml) dose-dependently inhibited the EtOH-induced tumor necrosis factor-alpha (TNF-alpha) secretion. ACAE (1-100 microg/ml) also inhibited the EtOH and TNF-alpha-induced cytotoxicity. Furthermore, we found that ACAE inhibited the TNF-alpha-induced apoptosis of Hep G2 cells. These results suggest that ACAE may prevent the EtOH-induced cytotoxicity through inhibition of the apoptosis of Hep G2 cells.


Asunto(s)
Apoptosis/efectos de los fármacos , Carcinoma Hepatocelular/metabolismo , Etanol/toxicidad , Liliaceae , Neoplasias Hepáticas/metabolismo , Extractos Vegetales/uso terapéutico , Factor de Necrosis Tumoral alfa/antagonistas & inhibidores , Carcinoma Hepatocelular/tratamiento farmacológico , Supervivencia Celular/efectos de los fármacos , Ensayo de Inmunoadsorción Enzimática , Etanol/antagonistas & inhibidores , Humanos , Neoplasias Hepáticas/tratamiento farmacológico , Raíces de Plantas , Células Tumorales Cultivadas/efectos de los fármacos , Factor de Necrosis Tumoral alfa/metabolismo
17.
Life Sci ; 67(10): 1185-95, 2000.
Artículo en Inglés | MEDLINE | ID: mdl-10954052

RESUMEN

Vanillyl alcohol (VA) is a component of Gastrodia elata Bl. (GE), which is a traditional Chinese herb widely used to treat convulsive disorders or dizziness. This study examined the role of VA in the anticonvulsive properties of GE in a Sprague-Dawley rat model of epilepsy. The anticonvulsive and free radical scavenging activities of VA were examined after intracortical injection of ferric chloride (100 mM, 8 microl) to induce epileptic seizures. These seizures were verified by behavioral observations and electroencephalographic (EEG) and electromyographic (EMG) recordings. Ferric chloride injection resulted in increased lipid peroxide levels in the ipsilateral and contralateral cerebral cortex, and increased luminol-chemiluminescence (CL) and lucigenin-CL counts in the peripheral blood. Intraperitoneal injection (i.p.) of VA (200 mg/kg or 100 mg/kg) or phenytoin 10 mg/kg prior to ferric chloride administration significantly inhibited wet dog shakes (WDS) and lipid peroxide levels in the bilateral cerebral cortex. VA 200 mg/kg also significantly reduced luminol-CL and lucigenin-CL counts in the peripheral blood, but no significant effect was observed following administration of VA 100 mg/kg or phenytoin. These data indicate that VA has both anticonvulsive and suppressive effects on seizures and lipid peroxidation induced by ferric chloride in rats. Data from the present study also demonstrate that VA has free radical scavenging activities, which may be responsible for its anticonvulsive propertics. This finding is consistent with the results from previous studies that generation of superoxide radical evoked by injection of iron salt into rat brain plays a critical role in ferric chloride-induced seizures. In addition, the results of the present study suggest that the anticonvulsive effect of GE may be attributable, at least in part, to its VA component.


Asunto(s)
Anticonvulsivantes/farmacología , Alcoholes Bencílicos/farmacología , Epilepsia/tratamiento farmacológico , Depuradores de Radicales Libres/farmacología , Acridinas , Animales , Conducta Animal/efectos de los fármacos , Encéfalo/efectos de los fármacos , Encéfalo/metabolismo , Cloruros , Convulsivantes/antagonistas & inhibidores , Convulsivantes/toxicidad , Medicamentos Herbarios Chinos/farmacología , Electroencefalografía , Electromiografía , Epilepsia/sangre , Epilepsia/inducido químicamente , Compuestos Férricos/antagonistas & inhibidores , Compuestos Férricos/toxicidad , Peroxidación de Lípido/efectos de los fármacos , Peróxidos Lipídicos/sangre , Peróxidos Lipídicos/metabolismo , Mediciones Luminiscentes , Luminol , Masculino , Plantas Medicinales , Ratas , Ratas Sprague-Dawley , Especies Reactivas de Oxígeno/metabolismo
18.
DNA Cell Biol ; 19(6): 319-29, 2000 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-10882231

RESUMEN

The imidazoline-1 receptor (IR1) is considered a novel target for drug discovery. Toward cloning an IR1, a truncated cDNA clone was isolated from a human hippocampal lambda gt11 cDNA expression library by relying on the selectivity of two antisera directed against candidate IR proteins. Amplification reactions were performed to extend the 5' and 3' ends of this cDNA, followed by end-to-end PCR and conventional cloning. The resultant 5131-basepair molecule, designated imidazoline receptor-antisera-selected (IRAS) cDNA, was shown to encode a 1504-amino acid protein (IRAS-1). No relation exists between the amino acid sequence of IRAS-1 and proteins known to bind imidazolines (e.g., it is not an alpha2-adrenoceptor or monoamine oxidase subtype). However, certain sequences within IRAS-1 are consistent with signaling motifs found in cytokine receptors, as previously suggested for an IR1. An acidic region in IRAS-1 having an amino acid sequence nearly identical to that of ryanodine receptors led to the demonstration that ruthenium red, a dye that binds the acidic region in ryanodine receptors, also stained IRAS-1 as a 167-kD band on SDS gels and inhibited radioligand binding of native I1 sites in untransfected PC-12 cells (a source of authentic I1 binding sites). Two epitope-selective antisera were also generated against IRAS-1, and both reacted with the same 167-kD band on Western blots. In a host-cell-specific manner, transfection of IRAS cDNA into Chinese hamster ovary cells led to high-affinity I1 binding sites by criteria of nanomolar affinity for moxonidine and rilmenidine. Thus, IRAS-1 is the first protein discovered with characteristics of an IR1.


Asunto(s)
Receptores de Droga/genética , Receptores de Droga/inmunología , Receptores de Droga/metabolismo , Secuencias de Aminoácidos , Secuencia de Aminoácidos , Animales , Western Blotting , Células CHO/metabolismo , Células COS/metabolismo , Clonidina/análogos & derivados , Clonidina/metabolismo , Clonación Molecular , Cricetinae , ADN Complementario , Epinefrina/metabolismo , Humanos , Idazoxan/metabolismo , Imidazoles/metabolismo , Receptores de Imidazolina , Sueros Inmunes , Radioisótopos de Yodo , Datos de Secuencia Molecular , Nafazolina/metabolismo , Rojo de Rutenio/química , Rojo de Rutenio/metabolismo , Lugares Marcados de Secuencia , Coloración y Etiquetado , Transfección , Yohimbina/metabolismo
19.
J Ocul Pharmacol Ther ; 16(1): 75-9, 2000 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10673134

RESUMEN

The proper choice of effective antibiotics is a mainstay for the treatment of orbital cellulitis. The lack of native data regarding the microorganism causing the infection and its antibiotic sensitivity prompted us to conduct this study. We retrospectively collected 29 cases of orbital cellulitis admitted to Chung-Ho Memorial Hospital of Kaohsiung Medical College from January 1994 to September 1998. The effectiveness of antibiotics with bacterial susceptibility was analyzed. Of the 29 cases, fifteen were male and fourteen female. The patients ranged in age from 7 months to 79 years (mean, 37.6 years). Sinusitis (9 cases, 31.0%) is the most common etiology. Fourteen cases received both medical and surgical treatments. Eighteen cases had purulent discharge from the infection areas sent for culture isolation of the microorganism. The culture positive rate was 50% (9 in 18 cases). The Staphylococcus aureus (5 cases) was the most common pathogen. The bacterial susceptibility test showed drug resistance of 100% for penicillin G (seven out of seven cases; 7/7), 100% for ampicillin (10/10), and 0% for amikacin (0/3) and vancomycin (0/7). Penicillin and ampicillin are not effective for those isolated bacteria. Oxacillin and gentamicin, frequently used in first line treatment, might encounter drug resistance in some cases. Amikacin and vancomycin, without any resistance in bacterial susceptibility tests, could be used in vision-threatening, critical, and intractable cases.


Asunto(s)
Antibacterianos/uso terapéutico , Celulitis (Flemón)/tratamiento farmacológico , Farmacorresistencia Microbiana/genética , Enfermedades Orbitales/tratamiento farmacológico , Adolescente , Adulto , Anciano , Niño , Preescolar , China , Femenino , Humanos , Lactante , Masculino , Pruebas de Sensibilidad Microbiana , Persona de Mediana Edad , Estudios Retrospectivos
20.
Am J Chin Med ; 27(2): 227-39, 1999.
Artículo en Inglés | MEDLINE | ID: mdl-10467456

RESUMEN

Various fractions of the ethanol extract from the root wood of Cudrania cochinchinensis var. gerontogea (Moraceae) were evaluated for their anti-inflammatory effects on carrageenan-induced edema and hepatoprotective activities on carbon tetrachloride (CCl4)-induced and D-galactosamine-(D-GalN) induced acute hepatotoxicity in rats. The fractions (n-hexane, CHCl3, EtOAc, n-BuOH, and H2O) displayed significant inhibitory activity against carrageenan-induced edema, and the active anti-inflammatory components were further localized in the n-BuOH fraction, which exhibited the greatest anti-inflammatory effect, an effect 5% greater than indomethacin (which was used as a standard reference substance). Each fraction exerted a significant hepatoprotective effect by reducing enzymatic alteration (sGOT and sGPT) and by improving hepatic lesions, including liver centrilobular inflammation, cell necrosis, fatty change, ballooning degeneration in CCl4-induced acute hepatitis; and necrosis of the portal area in D-GalN-induced acute liver injury. The n-BuOH and EtOAc fractions had the greatest hepatoprotective effects on CCl4-induced liver injury; in contrast, the CHCl3 fraction was most potent against D-GalN intoxication, which is comparable to silymarin, as a recognized hepatoprotective drug.


Asunto(s)
Antiinflamatorios no Esteroideos/farmacología , Enfermedad Hepática Inducida por Sustancias y Drogas/prevención & control , Plantas Medicinales/química , Alanina Transaminasa/sangre , Animales , Aspartato Aminotransferasas/sangre , Intoxicación por Tetracloruro de Carbono/prevención & control , Carragenina , Enfermedad Hepática Inducida por Sustancias y Drogas/patología , Edema/inducido químicamente , Edema/prevención & control , Galactosamina/toxicidad , Hígado/patología , Masculino , Ratones , Ratones Endogámicos ICR , Extractos Vegetales/farmacología , Extractos Vegetales/toxicidad , Ratas , Ratas Wistar
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