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1.
JMIR Public Health Surveill ; 7(1): e20236, 2021 01 19.
Artigo em Inglês | MEDLINE | ID: mdl-33342765

RESUMO

BACKGROUND: COVID-19 was first reported in Wuhan, China, in December 2019, and it has since spread worldwide. The Association of Korean Medicine (AKOM) established the COVID-19 telemedicine center of Korean medicine (KM telemedicine center) in Daegu and Seoul. OBJECTIVE: The aim of this study was to describe the results of the KM telemedicine center and the clinical possibility of using herbal medicines for COVID-19. METHODS: All procedures were conducted by voice call following standardized guidelines. The students in the reception group obtained informed consent from participants and they collected basic information. Subsequently, Korean Medicine doctors assessed COVID-19-related symptoms and prescribed the appropriate herbal medicine according to the KM telemedicine guidelines. The data of patients who completed the program by June 30, 2020, were analyzed. RESULTS: From March 9 to June 30, 2020, 2324 patients participated in and completed the KM telemedicine program. Kyung-Ok-Ko (n=2285) was the most prescribed herbal medicine, and Qingfei Paidu decoction (I and II, n=2053) was the second most prescribed. All COVID-19-related symptoms (headache, chills, sputum, dry cough, sore throat, fatigue, muscle pain, rhinorrhea, nasal congestion, dyspnea, chest tightness, diarrhea, and loss of appetite) improved after treatment (P<.001). CONCLUSIONS: The KM telemedicine center has provided medical service to 10.8% of all patients with COVID-19 in South Korea (as of June 30, 2020), and it is still in operation. We hope that this study will help to establish a better health care system to overcome COVID-19.


Assuntos
Tratamento Farmacológico da COVID-19 , Medicamentos de Ervas Chinesas/uso terapêutico , Telemedicina , Adolescente , Adulto , COVID-19/epidemiologia , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , República da Coreia/epidemiologia , Adulto Jovem
2.
Acupunct Med ; 38(4): 255-263, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32310005

RESUMO

OBJECTIVE: This retrospective propensity score-matched cohort study aimed to examine the frequency of acromioplasty among patients with shoulder disorders receiving and not receiving acupuncture, based on Korea National Health Insurance Service-National Sample Cohort (NHIS-NSC) data. METHODS: We included cases of high-frequency shoulder disorders-adhesive capsulitis, rotator cuff syndrome, shoulder impingement syndrome, and sprain and strain of the shoulder joint-stratified from the Korea NHIS-NSC database between 2002 and 2013; cases were classified into two groups based on a history of acupuncture treatment performed at least twice within 6 weeks (acupuncture group: n = 111,561; control group: n = 71,340). We examined propensity scores and hazard ratios (HRs) for the frequency of acromioplasty, within 2 years of the first treatment or first examination in the acupuncture and control groups, respectively; cumulative survival rates were estimated using Kaplan-Meier survival analysis. RESULTS: Following propensity score matching, no differences were observed between the acupuncture and control groups for variables including sex, age, income and the Charlson comorbidity index. In addition, the incidence rates of acromioplasty within 2 years were lower in the acupuncture group than in the control group (HR 0.264; 95% confidence interval 0.224-0.311). Based on differences in sensitivity analyses for the numbers of acupuncture sessions and treatment duration, the frequency of acromioplasty within 2 years was lower in the acupuncture group than in the control group. CONCLUSION: This study found that the frequency of acromioplasty was reduced in patients with shoulder disorders who had been treated with acupuncture. Although the findings need to be verified by prospective randomized clinical trials, these results imply that acupuncture may be effective at reducing the incidence rate of shoulder surgery.


Assuntos
Terapia por Acupuntura , Artroplastia/estatística & dados numéricos , Dor de Ombro/terapia , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pontuação de Propensão , Estudos Retrospectivos , Adulto Jovem
3.
World J Mens Health ; 36(3): 230-238, 2018 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-29623697

RESUMO

PURPOSE: The aim of this study was to investigate the efficacy and safety of a mixed extract of Trigonella foenum-graecum seed and Lespedeza cuneata (TFGL) for the treatment of testosterone deficiency syndrome (TDS). MATERIALS AND METHODS: Patients were instructed to take a placebo or 200 mg TFGL capsule twice per day for 8 weeks. The primary efficacy variable was the change from baseline in the Aging Males' Symptoms scale (AMS), as well as levels of serum total and free testosterone. Secondary efficacy measurements included changes from baseline in the number of 'yes' answers on the Androgen Deficiency in the Aging Male (ADAM) questionnaire, levels of serum total cholesterol, high density lipoprotein cholesterol (HDL-C), low density lipoprotein cholesterol (LDL-C), triglyceride, all domain scores of the International Index of Erectile Function (IIEF), perceived stress scale-10 (PSS-10), as well as changes in body composition. RESULTS: The TFGL group exhibited a significant improvement in the AMS scores at 8 weeks, total testosterone at 8 weeks, and free testosterone at 4 and 8 weeks. At 4 weeks, 25% of the TFGL group changed to negative in terms of ADAM scores and 34.1% of the TFGL group had negative scores at the end of the study. The TFGL group exhibited a significant improvement in total cholesterol, HDL-C, LDL-C, triglyceride, IIEF scores, and PSS-10 scores at 8 weeks. CONCLUSIONS: The mixed extract of TFGL resulted in significant improvements in symptoms of TDS, as measured by the AMS, ADAM, PSS-10 and testosterone levels.

4.
BMC Complement Altern Med ; 16(1): 494, 2016 Dec 01.
Artigo em Inglês | MEDLINE | ID: mdl-27905929

RESUMO

BACKGROUND: There are growing interests in using various methods including traditional and complementary medicines (T&CM) for tobacco control. The study aimed to introduce how traditional Korean medicine (TKM) applied to smoking cessation programmes in Korea and to show the detail information of each programme for designing other smoke cessation programmes. METHODS: Reports of the smoke cessation programmes in Korea were searched on March 10th, 2016, from the webpages of the related agencies and the databases: the Ministry of Health and Welfare, the Korea Health Foundation, the Association of Korean Medicine, PubMed, Google scholar, the RISS, the KISS, the NDSL, and the OASIS. Smoking cessation programmes, projects, or services using traditional Korean medicine (TKM) were included with no language, implementation site, and year restrictions. RESULTS: The three smoking cessation programmes using TKM in South Korea were the public health centre smoking cessation programme (PHC-SCP), the Ministry of Gender Equality & Family smoking cessation programme (MOGEF-SCP), and the National Health Insurance Service smoking cessation treatment project (NHIS-SCP). All programmes included ear acupuncture and counselling. Manual acupuncture was only used in the NHIS-SCP. The MOGEF-SCP and the NHIS-SCP used herbal medicines selectively. The PHC-SCP and MOGEF-SCP provided education programme and other tools such as non-smoking doll, self-writing handbook. They were run at no cost for participants. Treatment period were different for each programmes, 3 weeks, 4 weeks, 8 to 12 weeks, respectively. Treatment frequency was twice a week for PHC-SCP and MOGEF-SCP, and dependent on each clinic for NHIS-SCP. CONCLUSIONS: This study showed the summaries of the smoking cessation programme that used TKM. The three programmes and the detail information will be a reference for other countries that are going to apply T&CM to their smoking cessation programme. Though TKM integrated smoking cessation programmes had been contributed to stop smoking, persistent efforts are needed to develop more effective and various treatments. In addition, this study suggests that consistent support and systematic reporting system are needed to be successful in non-smoking strategy.


Assuntos
Medicina Tradicional Coreana , Abandono do Hábito de Fumar/métodos , Adolescente , Adulto , Humanos , Adulto Jovem
5.
Int J Mol Sci ; 16(10): 24219-42, 2015 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-26473849

RESUMO

Plants rich in antioxidant substances may be useful for preventing skin aging. Pomegranates, containing flavonoids and other polyphenolic compounds, are widely consumed due to their beneficial properties. We examined the underlying mechanisms of dried pomegranate concentrate powder (PCP) on melanin synthesis in B16F10 melanoma cells. The antioxidant effects of PCP were determined by measuring free radical scavenging capacity and transcript levels of antioxidant enzymes. To explore the inhibitory effects of PCP on melanin synthesis, we measured tyrosinase activity and melanin content in α-melanocyte stimulating hormone (α-MSH)-stimulated B16F10 cells. In addition, the levels of tyrosinase-related protein-1 (TRP-1), TRP-2, tyrosinase, and microphthalmia-associated transcription factor (MITF) expression were determined by Western blotting. Changes in the phosphorylation status of protein kinase A (PKA), cAMP response element-binding protein (CREB), mitogen-activated protein kinases (MAPKs), phosphatidylinositol 3-kinase (PI3K), serine/threonine kinase Akt, and glycogen kinase 3ß (GSK3ß) were also examined. The free radical scavenging activity of PCP increased in a dose-dependent manner. In PCP-treated B16F10 cells, transcript levels of glutathione peroxidase-1 (GPx-1) were increased compared with α-MSH-stimulated cells. In addition, PCP led to the down-regulation of phospho-p38, phospho-PKA, phospho-CREB, phospho-GSK3ß, MITF, and TRP-1 compared with α-MSH-stimulated B16F10 cells. We believe this effect may be associated with PCP activity, which leads to the inhibition of melanin production and tyrosinase activity. These results suggest that PCP decreases tyrosinase activity and melanin production via inactivation of the p38 and PKA signaling pathways, and subsequently decreases phosphorylation of CREB, MITF, and melanogenic enzymes. These observations provided new insights on the molecular mechanisms of the skin-whitening property of PCP.


Assuntos
Lythraceae/metabolismo , Melaninas/biossíntese , Melanoma Experimental/tratamento farmacológico , Monofenol Mono-Oxigenase/metabolismo , Preparações de Plantas/farmacologia , Animais , Antioxidantes/farmacologia , Proteína de Ligação a CREB/metabolismo , Linhagem Celular Tumoral , Proteínas Quinases Dependentes de AMP Cíclico/metabolismo , Sequestradores de Radicais Livres/farmacologia , Liofilização , Glutationa Peroxidase/metabolismo , Quinase 3 da Glicogênio Sintase/metabolismo , Glicogênio Sintase Quinase 3 beta , Camundongos , Fator de Transcrição Associado à Microftalmia/metabolismo , Fosfatidilinositol 3-Quinase/metabolismo , Fosforilação/efeitos dos fármacos , Proteínas Proto-Oncogênicas c-akt/metabolismo , alfa-MSH/farmacologia , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo , Glutationa Peroxidase GPX1
6.
PLoS One ; 9(10): e110109, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25314292

RESUMO

PURPOSE: This study investigated the effect of Melissa officinalis extract on laser-induced choroidal neovascularization (CNV) in a rat model. The mechanism by which M. officinalis extract acted was also investigated. METHODS: Experimental CNV was induced by laser photocoagulation in Brown Norway rats. An active fraction of the Melissa leaf extract was orally administered (50 or 100 mg/kg/day) beginning 3 days before laser photocoagulation and ending 14 days after laser photocoagulation. Optical coherence tomography and fluorescein angiography were performed in vivo to evaluate the thickness and leakage of CNV. Choroidal flat mount and histological analysis were conducted to observe the CNV in vitro. Vascular endothelial growth factor (VEGF), matrix metalloproteinase (MMP)-2, and MMP-9 expression were measured in retinal and choroidal-scleral lysates 7 days after laser injury. Moreover, the effect of M. officinalis extract on tertiary-butylhydroperoxide (t-BH)-induced VEGF secretion and mRNA levels of VEGF, MMP-2, and MMP-9 were evaluated in human retinal epithelial cells (ARPE-19) as well as in human umbilical vein endothelial cells (HUVECs). RESULTS: The CNV thickness in M. officinalis-treated rats was significantly lower than in vehicle-treated rats by histological analysis. The CNV thickness was 33.93±7.64 µm in the high-dose group (P<0.001), 44.09±12.01 µm in the low-dose group (P = 0.016), and 51.00±12.37 µm in the control group. The proportion of CNV lesions with clinically significant fluorescein leakage was 9.2% in rats treated with high-dose M. officinalis, which was significantly lower than in control rats (53.4%, P<0.001). The levels of VEGF, MMP-2, and MMP-9 were significantly lower in the high-dose group than in the control group. Meanwhile, M. officinalis extract suppressed t-BH-induced transcription of VEGF and MMP-9 in ARPE-19 cells and HUVECs. CONCLUSIONS: Systemic administration of M. officinalis extract suppressed laser-induced CNV formation in rats. Inhibition of VEGF and MMP-9 via anti-oxidative activity may underlie this effect.


Assuntos
Inibidores da Angiogênese/farmacologia , Neovascularização de Coroide/prevenção & controle , Melissa/química , Extratos Vegetais/farmacologia , Inibidores da Angiogênese/uso terapêutico , Animais , Linhagem Celular , Corioide/irrigação sanguínea , Corioide/efeitos dos fármacos , Corioide/patologia , Neovascularização de Coroide/metabolismo , Avaliação Pré-Clínica de Medicamentos , Células Endoteliais da Veia Umbilical Humana/efeitos dos fármacos , Células Endoteliais da Veia Umbilical Humana/metabolismo , Humanos , Masculino , Metaloproteinase 2 da Matriz/metabolismo , Metaloproteinase 9 da Matriz/metabolismo , Extratos Vegetais/uso terapêutico , Ratos , Tomografia de Coerência Óptica , Fator A de Crescimento do Endotélio Vascular/metabolismo
7.
Int J Behav Med ; 21(4): 605-17, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24078491

RESUMO

BACKGROUND: Tai chi, also called taiji or tai chi chuan, is a form of mind-body exercise that originated from China. It combines Chinese martial arts and meditative movements that promote balance and healing of the mind and body, involving a series of slowly performed, dance-like postures that flow into one another. As it comprises mental concentration, physical balance, muscle relaxation, and relaxed breathing, tai chi shows great potential for becoming widely integrated into the prevention and rehabilitation of a number of medical and psychological conditions. PURPOSE: A growing body of clinical research has begun to evaluate the efficacy of tai chi as a therapy for a variety of health issues. A systematic review and meta-analysis were carried out on randomized controlled trials (RCTs) and quasi-experimental (Q-E) trials that studied the effects of tai chi on psychological well-being. METHOD: Drawn from English and Chinese databases, 37 RCTs and 5 Q-E studies published up to May 31, 2013 were included in the systematic review. The methodological quality of the RCTs was evaluated based on the following criteria: adequate sequence generation, allocation concealment, blinding, completeness of outcome data, selective reporting, and other potential biases. Statistical analyses were performed using Review Manager version 5.0. RESULTS: The studies in this review demonstrated that tai chi interventions have beneficial effects for various populations on a range of psychological well-being measures, including depression, anxiety, general stress management, and exercise self-efficacy. Meta-analysis was performed on three RCTs that used depression as an outcome measure (ES=-5.97; 95% CI -7.06 to -4.87), with I2=0%. CONCLUSION: In spite of the positive outcomes, the studies to date generally had significant methodological limitations. More RCTs with rigorous research design are needed to establish the efficacy of tai chi in improving psychological well-being and its potential to be used in interventions for populations with various clinical conditions.


Assuntos
Ansiedade/terapia , Depressão/terapia , Tai Chi Chuan/métodos , Exercícios Respiratórios/métodos , China , Exercício Físico/psicologia , Humanos , Saúde Mental , Estresse Psicológico/terapia
8.
J Holist Nurs ; 31(2): 139-48, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23463812

RESUMO

Despite the popularity of relaxation practices as mind-body therapy in the United States, little is known about those who practice these techniques. Using cross-sectional data from the 2007 National Health Interview Survey Alternative Medicine Supplement, this study examined potential correlates of engagement in relaxation practices, including sociodemographic characteristics, health behaviors, medical conditions, physical activity, drinking, smoking, and prayer for health. Individuals who engaged in relaxation practices were less likely to be older, male, Hispanic, high income, or residents in the South and Midwest. They were more likely to be college-educated, uninsured, and have one to two chronic conditions. Those with higher psychological distress and with asthma and pulmonary diseases practiced relaxation techniques more than individuals without these conditions. Findings suggest that relaxation practice is associated with lifestyles habits such as regular physical activity and prayer for health. Thus, relaxation practice has the potential to enhance health behaviors and lifestyle change.


Assuntos
Comportamentos Relacionados com a Saúde , Promoção da Saúde , Terapias Mente-Corpo/estatística & dados numéricos , Relaxamento , Adulto , Idoso , Estudos Transversais , Feminino , Comportamentos Relacionados com a Saúde/etnologia , Humanos , Estilo de Vida , Modelos Logísticos , Masculino , Meditação , Pessoa de Meia-Idade , Motivação , Análise Multivariada , Grupos de Autoajuda/estatística & dados numéricos , Fatores Socioeconômicos , Estresse Psicológico/prevenção & controle , Estados Unidos , Adulto Jovem
9.
Artigo em Inglês | MEDLINE | ID: mdl-23401706

RESUMO

Introduction. The effect of Qigong on psychological well-being is relatively unknown. This study systematically reviewed the effects of Qigong on anxiety, depression, and psychological well-being. Methods. Using fifteen studies published between 2001 and 2011, a systematic review was carried out and meta-analyses were performed on studies with appropriate homogeneity. The quality of the outcome measures was also assessed. Results. We categorized these studies into three groups based on the type of subjects involved as follows: (1) healthy subjects, (2) subjects with chronic illnesses, and (3) subjects with depression. Based on the heterogeneity assessment of available studies, meta-analyses were conducted in three studies of patients with type II diabetes in the second group, which suggested that Qigong was effective in reducing depression (ES = -0.29; 95% CI, -0.58-0.00) and anxiety (ES = -0.37; 95% CI, -0.66-0.08), as measured by Symptom Checklist 90, and in improving psychological well-being (ES = -0.58; 95% CI, -0.91-0.25) as measured by Diabetes Specific Quality of Life Scale. Overall, the quality of research methodology of existing studies was poor. Conclusions. Preliminary evidence suggests that Gigong may have positive effects on psychological well-being among patients with chronic illnesses. However the published studies generally had significant methodological limitations. More high-quality studies are needed.

10.
Am J Clin Nutr ; 94(6): 1465-70, 2011 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22030227

RESUMO

BACKGROUND: Serum phosphorus concentrations are associated with an increased risk of cardiovascular disease (CVD) and mortality in patients with renal insufficiency. This association has also been reported in Western individuals without chronic kidney disease (CKD). OBJECTIVE: It is unclear, however, whether this correlation occurs in Korean individuals without CKD, who usually ingest less phosphorus than do Western individuals. DESIGN: We reviewed the findings in 402 healthy Korean adults with a mean (±SD) age of 50.8 ± 8.5 y (n = 257 men and 145 women) and a glomerular filtration rate of 83.5 ± 14.1 mL/min, who underwent health screening with electron-beam computed tomography (EBCT). The study population was separated into 4 groups on the basis of the coronary calcium concentration (Agatston score: 0, >0 to ≤10, >10 to ≤100, and >100). Mean serum phosphorus concentrations, measured ≥10 y before EBCT, were compared. RESULTS: Multivariate analysis showed that age (P = 0.001), male sex (P = 0.002), family history of CVD (P = 0.006), serum glucose (P = 0.003), and serum phosphorus >3.6 mg/dL (P = 0.008) were significant factors influencing the coronary calcification group with an Agatston score >100, when those with an Agatston score of 0 were considered as the reference group. Compared with the group with a serum phosphorus concentration ≤3.3 mg/dL, the OR of an Agatston score >100 in individuals with a serum phosphorus concentration >3.6 to ≤3.9 mg/dL was 3.89 (95% CI: 1.43, 10.63; P = 0.008) and in those with a serum phosphorus concentration >3.9 mg/dL was 3.17 (95% CI: 1.19, 8.41; P = 0.021). CONCLUSION: A lower concentration of serum phosphorus within the normal range could be associated with less calcification of the coronary artery in Koreans with normal renal function.


Assuntos
Calcinose/fisiopatologia , Cálcio/sangue , Doença da Artéria Coronariana/etiologia , Vasos Coronários/fisiopatologia , Estado Nutricional , Fósforo/sangue , Adulto , Fatores Etários , Glicemia/metabolismo , Doença da Artéria Coronariana/sangue , Doença da Artéria Coronariana/fisiopatologia , Família , Feminino , Taxa de Filtração Glomerular , Humanos , Rim/fisiologia , Falência Renal Crônica , Coreia (Geográfico) , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Valores de Referência , Fatores de Risco , Fatores Sexuais , Tomografia Computadorizada por Raios X
11.
J Gerontol Soc Work ; 52(5): 517-33, 2009 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-19585326

RESUMO

Although recent scholarship focuses on the importance of religion to ethnic minorities and immigrants, relatively little attention has been given to how faith and spirituality help Asian immigrant elderly cope with life's challenges. This exploratory study was undertaken via in-depth interviews with 12 Chinese American older adults to further explore the meaning of suffering and faith as a coping mechanism for these challenges. Findings reveal that these respondents have developed particular adaptive strategies in managing their life challenges incorporating socio-emotional, cognitive, and instrumental aspects. Religious/spiritual coping was found to be embedded with respondents' values, faith, and cultural beliefs, and seem to be an important factor in developing effective coping strategies. Implications for the importance of culturally sensitive social work practice are discussed.


Assuntos
Adaptação Psicológica , Asiático/psicologia , Emigrantes e Imigrantes/psicologia , Religião , Idoso , Idoso de 80 Anos ou mais , China/etnologia , Feminino , Geriatria , Humanos , Masculino , Saúde Mental , Serviço Social , Fatores Socioeconômicos , Espiritualidade , Estados Unidos/epidemiologia
12.
J Gerontol Soc Work ; 48(3-4): 281-98, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17210533

RESUMO

This paper presents the results of a study on the impact of spirituality, religiousness, and social support on the psychological well-being among rural elderly. With a rural community sample of 215 older adults, hierarchical regression analyses found significant associations between dimensions of spirituality/religiousness, social support, and psychological well-being, with spirituality/religiousness inversely related to depression and social support, positively related to life satisfaction. Findings of this study suggest that practitioners need to develop programs or services that are congruent with religious/spiritual beliefs and practices in order to better enhance the psychosocial well-being and improve the quality of life among older persons in rural areas.


Assuntos
Avaliação Geriátrica , Saúde Holística , Religião e Psicologia , Saúde da População Rural , Apoio Social , Serviço Social em Psiquiatria , Espiritualidade , Adaptação Psicológica , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , North Carolina , Satisfação Pessoal , Projetos Piloto , Qualidade de Vida/psicologia , West Virginia
13.
Phytother Res ; 19(6): 546-8, 2005 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-16114087

RESUMO

Ginkgo biloba extract decreased plasma D-dimer concentration, a marker of intravascular coagulation, in chronic peritoneal dialysis patients. Blood levels of fibrinogen, von Willebrand factor, hs-CRP, albumin and liver enzyme levels were not significantly changed. No bleeding episode was reported. These results suggest that Ginkgo biloba extract was effective in partially reversing the thrombogenic coagulation profile without increasing the risk of bleeding.


Assuntos
Anti-Inflamatórios/farmacologia , Anticoagulantes/farmacologia , Ginkgo biloba , Fitoterapia , Extratos Vegetais/farmacologia , Anti-Inflamatórios/administração & dosagem , Anti-Inflamatórios/uso terapêutico , Anticoagulantes/administração & dosagem , Anticoagulantes/uso terapêutico , Fatores de Coagulação Sanguínea/efeitos dos fármacos , Feminino , Humanos , Falência Renal Crônica/terapia , Masculino , Pessoa de Meia-Idade , Diálise Peritoneal Ambulatorial Contínua , Extratos Vegetais/administração & dosagem , Extratos Vegetais/uso terapêutico
14.
Anticancer Drugs ; 13(8): 859-68, 2002 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12394272

RESUMO

Changes in glucose metabolism during diabetes are linked to an increased risk for the development of cancer. Increased activity of aldose reductase, the rate-limiting polyol pathway enzyme that converts glucose into sorbitol, mediates pathologies associated with diabetes and is thought to be involved in increased resistance to chemotherapeutic drugs. Thus, increased intracellular sorbitol levels may serve a protective function in cancer cells. In these studies we determined whether an inhibitor of aldose reductase could enhance the effectiveness of anticancer agents. Our findings indicate that treatment with the aldose reductase inhibitor, ethyl 1-benzyl-3-hydroxy-2(5H)-oxopyrrole-4-carboxylate (EBPC), enhances the cytotoxic effects of the anticancer agents doxorubicin and cisplatin in HeLa cervical carcinoma cells. To establish a mechanistic basis for the increased cytotoxicity by EBPC, we examined the activity of the extracellular signal-regulated kinase (ERK) pathway, which is an important regulator of cell growth. Interestingly, treatment with EBPC in combination with the chemotherapeutic drugs increased ERK activity as compared to treatment with the chemotherapeutic drugs, suggesting a possible role for the ERK pathway in mediating doxorubicin- or cisplatin-induced cell death. Consistent with this possibility, inhibition of ERK activation by the MEK inhibitor, U0126, reversed the EBPC-mediated enhancement of cell death. In summary, these data provide evidence that adjuvant therapy with aldose reductase inhibitors improves the effectiveness of chemotherapeutic drugs, possibly through an ERK pathway-mediated mechanism.


Assuntos
Aldeído Redutase/antagonistas & inibidores , Inibidores Enzimáticos/farmacologia , Proteínas Quinases Ativadas por Mitógeno/fisiologia , Ácido Pirrolidonocarboxílico/análogos & derivados , Ácido Pirrolidonocarboxílico/farmacologia , Cisplatino/farmacologia , Doxorrubicina/farmacologia , Ativação Enzimática/efeitos dos fármacos , Células HeLa , Humanos , Proteínas Quinases Ativadas por Mitógeno/antagonistas & inibidores , Poli(ADP-Ribose) Polimerases/metabolismo
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