RESUMO
Depression is a mental disorder characterized by low mood, lack of motivation, negative cognitive outlook, and sleep problems. Suicide may occur in severe cases, although suicidal thoughts are not seen in all cases. Globally, an estimated 350 million individuals grapple with depression, as reported by the World Health Organization. At present, drug and psychological treatments are the main treatments, but they produce insufficient responses in many patients and fail to work at all in many others. Consequently, treating depression has long been an important topic in society. Given the escalating prevalence of depression, a comprehensive strategy for managing its symptoms and impacts has garnered significant attention. In this context, nutritional psychiatry emerges as a promising avenue. Extensive research has underscored the potential benefits of a well-rounded diet rich in fruits, vegetables, fish, and meat in alleviating depressive symptoms. However, the intricate mechanisms linking dietary interventions to brain function alterations remain largely unexplored. This review delves into the intricate relationship between dietary patterns and depression, while exploring the plausible mechanisms underlying the impact of dietary interventions on depression management. As we endeavor to unveil the pathways through which nutrition influences mental well-being, a holistic perspective that encompasses multidisciplinary strategies gains prominence, potentially reshaping how we approach and address depression.
Assuntos
Antidepressivos , Transtornos Psicóticos , Humanos , Antidepressivos/uso terapêutico , Transtornos Psicóticos/tratamento farmacológico , Dieta , Alimentos , Estado Nutricional , Depressão/terapiaRESUMO
BACKGROUND: Terminally ill patients often experience exacerbations of diseases that render mainstream medicine ineffective in relieving symptoms, prompting attempts at complementary and alternative medicine (CAM). This study collected data from terminally ill patients and their relatives to determine differences between CAM use, behavioral patterns, and perceptions of health information about CAM. METHODS: A cross-sectional design using a self-administered questionnaire was adopted. Eight medical institutions in Taiwan with inpatient hospice palliative care units were chosen. Ninety-two terminally ill patients and 267 relatives met the inclusion criteria. The questions concerned the experience of CAM use, the kinds of products/services CAM provided, the purpose of CAM use, the source of CAM information, and the perceptions and attitudes toward CAM. RESULTS: Both terminally ill patients and their relatives have a high proportion of lifetime and one-year prevalence of CAM use (88.0% vs. 88.4%; p = 0.929). CAM use for musculoskeletal and neurological discomfort is higher among terminally ill patients than among their relatives. Relatives/friends are the most frequent sources of information on CAM (53.3% vs. 62.2%; p = 0.133). The percentage of terminally ill patients who discontinued mainstream medical treatment because of CAM use was higher than that of their relatives (18.5% vs. 9.3%; p = 0.026). More than half the terminally ill patients and their relatives had never been asked about CAM by medical staff (64.1% vs. 66.7%), nor had they informed medical professionals about the use of CAM products and services (63% vs. 66.9%). Random inquiries by medical professionals may be associated with increased disclosure of CAM use (terminally ill patients: odds ratio, 9.75; 95% confidence interval, 1.97-48.35 vs. relatives: odds ratio, 5.61; 95% confidence interval, 2.66-11.83). CONCLUSIONS: The high prevalence and concealment of CAM use in terminally ill patients should be considered. Medical professionals should establish a friendly and barrier-free communication model, encourage patients to share CAM experiences, and provide evidence-based information on the use of CAM products and services, to reduce the potential damage caused by harmful use.
Assuntos
Terapias Complementares , Hospitais para Doentes Terminais , Humanos , Pacientes Internados , Doente Terminal , Estudos TransversaisRESUMO
BACKGROUND: Coronary heart disease (CHD) is a heart disease caused by myocardial ischemia, hypoxia or necrosis due to stenosis or occlusion of lumen caused by coronary atherosclerosis. It belongs to ischemic cardiomyopathy and is more common in clinic. Previous studies have shown that Wen-Dan Decoction (WDD) is safe and effective, but there is a lack of systematic reviews. The purpose of this study is to systematically study the efficacy of WDD in the treatment of patients with CHD. METHODS: We will search the following databases: PubMed, EMBASE, Web of Science, Central, Chinese databases China Biomedical Literature, Wanfang Chinese digital periodical and conference database (Wanfang Database), China National Knowledge Infrastructure database, and VIP Chinese Science and Technique Journals Database (VIP) from inception to August 2021. All published randomized controlled trials related to this study will be included. The ongoing or unpublished trials will be searched from National Institutes of Health clinical registry Clinical Trials, International Clinical Trials Registry Platform and the Chinese clinical trial registration platform. Two researchers separately screened the literature and extracted data. The primary outcome is total effective rate. The RevMan V5.3 will be used to evaluate literature and data analysis synthesis. RESULTS: This study will provide a reliable evidence-based basis for the clinical application of WDD in the treatment of patients with CHD. CONCLUSION: The effectiveness of WDD for CHD will be evaluated. UNIQUE INPLASY NUMBER: 2021110001.
Assuntos
Doença das Coronárias/tratamento farmacológico , Medicamentos de Ervas Chinesas/uso terapêutico , Humanos , Metanálise como Assunto , Projetos de Pesquisa , Revisões Sistemáticas como Assunto , Resultado do TratamentoRESUMO
Mesenchymal stem cells (MSCs) are adult stem cells from mesoderm with multi potential differentiation, and are being widely studied as a promising treatment for autoimmune diseases. The main inflammatory factors of experimental autoimmune uveitis (EAU) are T helper type 1 (Th1) and Th17. Regulatory B cells (Bregs) are a newly designated B cell subgroup, which has been proved to play a key role in regulating inflammation, autoimmunity and cancer. In this regard, we establish the EAU model by injecting interphotoreceptor retinoid-binding protein combined with complete Freund's adjuvant into the tail vein and bilateral thighs of rats, and inject MSCs or equal volume of phosphate buffer saline intraperitoneally on the day of immunization. Dynamic changes of cell subsets and cytokine expression are tested at different time periods to explore the relationship between MSCs treatment and disease prognosis during EAU course. Our results suggest that compared with the model control group, MSCs treatment can significantly reduce the production of Th1 and Th17 cytokines during EAU, while the production of regulatory B cells (Bregs) cytokines is significantly increased. At the same time, MSCs can reduce the proportion of Th17 in lymphocytes while the proportion of Bregs is elevated, thus inhibiting the differentiation and activity of interleukin in EAU rats. All this results provide more powerful evidence for cell therapy of autoimmune uveitis.
Assuntos
Linfócitos B Reguladores , Células-Tronco Mesenquimais , Uveíte , Animais , Linfócitos B Reguladores/metabolismo , Modelos Animais de Doenças , Células-Tronco Mesenquimais/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Ratos , Células Th1 , Uveíte/metabolismo , Uveíte/terapiaRESUMO
BACKGROUND: Medical staff may have difficulties in using conventional medicine to manage symptoms among terminally ill patients, including adverse effects of the treatment. Traditional Chinese medicine (TCM) is regarded as a complementary or alternative medicine, and has been increasingly used in the field of palliative medicine in recent years. This study aimed to investigate the experiences of and attitudes toward using TCM among palliative care professionals, and to provide preliminary information about its use in palliative care. METHODS: This was a cross-sectional survey study conducted in eight inpatient hospice wards in Taiwan between December 2014 and February 2016. The questionnaire was self-administered, and was analyzed with descriptive statistics including Pearson's Chi-square test and Fisher's exact test. RESULTS: A total of 251 palliative care professionals responded to the questionnaire, of whom 89.7% and 88.9% believed that the use of TCM could improve the physical symptoms and quality of life in terminally ill patients, respectively. Overall, 59.8%, of respondents suggested that TCM had rare side effects, and 58.2% were worried that TCM could affect the liver and kidney function of patients. In total, 89.7% and 88.0% of professionals agreed there were no suitable clinical practice guidelines and educational programs, respectively, for TCM use in palliative care. CONCLUSIONS: Most of the respondents agreed there was insufficient knowledge, skills-training, and continuing education on the use of TCM in terminally ill patients in Taiwan. These results show that to address patient safety considerations, guidelines about use of TCM in palliative care should be established.
RESUMO
BACKGROUND: The use of home health care (HHC) is increasing worldwide. This may have an impact not only on patients and their caregivers' health but on care resource utilization and costs. We lack information on the impact of HHC on the broader dimensions of health status and care resource utilization. More understanding of the longitudinal HHC impact on HHC patients and caregivers is also needed. Moreover, we know little about the synergy between HHC and social care. Therefore, the present study aims to observe longitudinal changes in health, care resource utilization and costs and caregiving burden among HHC recipients and their caregivers in Taiwan. METHODS: A prospective cohort study "Home-based Longitudinal Investigation of the Multidisciplinary Team Integrated Care (HOLISTIC)" will be conducted and 600 eligible patient-caregiver dyads will be recruited and followed with comprehensive quantitative assessments during six home investigations over two years. The measurements include physical function, psychological health, cognitive function, wellbeing, shared decision making and advance care planning, palliative care and quality of dying, caregiving burden, continuity and coordination of care, care resource utilization, and costs. DISCUSSION: The HOLISTIC study offers the opportunity to comprehensively understand longitudinal changes in health conditions, care resource utilization and costs and caregiving burden among HHC patients and caregivers. It will provide new insights for clinical practitioners and policymakers. TRIAL REGISTRATION: ClinicalTrials.gov Identifier is NCT04250103 which has been registered on 31st January 2020.
Assuntos
Cuidadores , Prestação Integrada de Cuidados de Saúde , Estudos de Coortes , Humanos , Equipe de Assistência ao Paciente , Estudos Prospectivos , TaiwanRESUMO
BACKGROUND AND OBJECTIVE: Critical clinical questions regarding how soon and how long the analgesic effect will be achieved by acupuncture, as well as who will be responsive to acupuncture, need further address. The aim of the study was to investigate the response-time relationship and covariate effects of acupuncture. DATABASES AND DATA TREATMENT: PubMed and EMBASE were searched up to December 2018 for randomized controlled trials that involved sham acupuncture, true acupuncture and conventional therapy. We used a model-based longitudinal meta-analysis to characterize the response-time profile of these treatments. RESULTS: Seventy-seven randomized clinical trials involved chronic shoulder, neck, knee and low back pain were included. The response-time analysis suggested that the treatment duration of acupuncture will be 5 weeks or more to achieve 80% of maximum analgesic effect. Moreover a lower baseline pain intensity and the location of low back pain resulted in a lower pain relief of acupuncture intervention. The absolute maximum analgesic effects of sham acupuncture and conventional therapy were 22.6 and 15.8 points at a 0-100 NRS scale. The absolute effect of true acupuncture was 26.1 points for low back pain (relative effect of 3.5 and 9.4 points to sham and conventional therapy), 34.9 points for other pain body locations (relative effect of 12.3 and 19.1 points to sham and conventional therapy), in patients with a baseline pain intensity of 60 points. CONCLUSION: The treatment duration of acupuncture will not be less than 5 weeks to achieve 80% maximum analgesic effect. Higher analgesic effect was related to higher baseline pain intensity and pain location of neck, shoulder and knee. SIGNIFICANCE: Our systematic review and meta-analysis provides the clear evidence for the treatment duration and significant related covariates of acupuncture intervention for chronic pain. These results provide useful suggestion for acupuncture intervention in clinical pain management.
Assuntos
Terapia por Acupuntura , Dor Crônica , Dor Lombar , Dor Crônica/terapia , Humanos , Dor Lombar/terapia , Manejo da Dor , Resultado do TratamentoRESUMO
The genus Corydalis is recognized as one of the most taxonomically challenging plant taxa. It is mainly distributed in the Himalaya-Hengduan Mountains, a global biodiversity hotspot. To date, no effective solution for species discrimination and taxonomic assignment in Corydalis has been developed. In this study, five nuclear and chloroplast DNA regions, ITS, ITS2, matK, rbcL, and psbA-trnH, were preliminarily assessed based on their ability to discriminate Corydalis to eliminate inefficient regions, and the three regions showing good performance (ITS, ITS2 and matK) were then evaluated in 131 samples representing 28 species of 11 sections of four subgenera in Corydalis using three analytical methods (NJ, ML, MP tree; K2P-distance and BLAST). The results showed that the various approaches exhibit different species identification power and that BLAST shows the best performance among the tested approaches. A comparison of different barcodes indicated that among the single barcodes, ITS (65.2%) exhibited the highest identification success rate and that the combination of ITS + matK (69.6%) provided the highest species resolution among all single barcodes and their combinations. Three Pharmacopoeia-recorded medicinal plants and their materia medica were identified successfully based on the ITS and ITS2 regions. In the phylogenetic analysis, the sections Thalictrifoliae, Sophorocapnos, Racemosae, Aulacostigma, and Corydalis formed well-supported separate lineages. We thus hypothesize that the five sections should be classified as an independent subgenus and that the genus should be divided into three subgenera. In this study, DNA barcoding provided relatively high species discrimination power, indicating that it can be used for species discrimination in this taxonomically complicated genus and as a potential tool for the authentication of materia medica belonging to Corydalis.
RESUMO
BACKGROUND: Cancer patients with schizophrenia may face disparities in end-of life care, and it is unclear whether schizophrenia affects their medical care and treatment. METHODS: We conducted a nationwide population-based cohort study based on the National Health Insurance Research Database of Taiwan. The study population included patients >20years old who were newly diagnosed as having one of six common cancers between 2000 and 2012 (schizophrenia cohort: 1911 patients with both cancer and schizophrenia; non-schizophrenia cohort: 7644 cancer patients without schizophrenia). We used a multiple logistic regression model to analyze the differences in medical treatment between the two cohorts in the final 1 and 3months of life. RESULTS: In the 1month before death, there was higher intensive care unit utilization in the schizophrenia group [odd ratio (OR)=1.21, 95% confidence interval (CI)=1.07-1.36] and no significant differences between the groups in-hospital stay length or hospice care. The schizophrenia patients received less chemotherapy (OR=0.60, 95% CI=0.55-0.66) but more invasive interventions, such as cardiopulmonary resuscitation (OR=1.34, 95% CI=1.15-1.57). Advanced diagnostic examinations, such as computed tomography/magnetic resonance imaging/sonography (OR=0.80, 95% CI=0.71-0.89), were used less often for the schizophrenia patients. The 1- and 3-month prior to death results were similar. CONCLUSION: End-of-life cancer patients with schizophrenia underwent more frequent invasive treatments but less chemotherapy and examinations. Treatment plans/advance directives should be discussed with patients/families early to enhance end-of-life care quality and reduce health care disparities caused by schizophrenia.
Assuntos
Disparidades em Assistência à Saúde/estatística & dados numéricos , Neoplasias , Esquizofrenia , Assistência Terminal/estatística & dados numéricos , Adulto , Distribuição por Idade , Idoso , Estudos de Coortes , Planejamento em Saúde Comunitária , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Programas Nacionais de Saúde , Neoplasias/complicações , Neoplasias/epidemiologia , Neoplasias/enfermagem , Esquizofrenia/enfermagem , Taiwan/epidemiologia , Assistência Terminal/psicologiaRESUMO
Anterior cingulate cortex (ACC) is known to participate in numerous brain functions, such as memory storage, emotion, attention, as well as perception of acute and chronic pain. ACC-dependent brain functions often rely on ACC processing of various forms of environmental information. To understand the neural basis of ACC functions, previous studies have investigated ACC responses to environmental stimulation, particularly complex sensory stimuli as well as award and aversive stimuli, but this issue remains to be further clarified. Here, by performing whole-cell recording in vivo in anaesthetized adult rats, we examined membrane-potential (MP) responses of layer II/III ACC neurons that were evoked by a brief flash of visual stimulation and pain-related electrical stimulation delivered to hind paws. We found that ~54 and ~81 % ACC neurons exhibited excitatory MP responses, subthreshold or suprathreshold, to the visual stimulus and the electrical stimulus, respectively, with no cell showing inhibitory MP responses. We further found that the visually evoked ACC response could be greatly diminished by local lidocaine infusion in the visual thalamus, and only their temporal patterns but not amplitudes could be changed by large-scale visual cortical lesions. Our in vivo whole-cell recording data characterized in ACC neurons a visually evoked response, which was largely dependent on the visual thalamus but not visual cortex, as well as a noxious electrical stimulus-evoked response. These findings may provide potential mechanisms that are used for ACC functions on the basis of sensory information processing.
Assuntos
Potenciais Evocados/fisiologia , Giro do Cíngulo/fisiologia , Potenciais da Membrana/fisiologia , Neurônios/fisiologia , Estimulação Luminosa , Animais , Estimulação Elétrica , Potenciais Evocados/efeitos dos fármacos , Giro do Cíngulo/efeitos dos fármacos , Lidocaína/farmacologia , Masculino , Potenciais da Membrana/efeitos dos fármacos , Neurônios/efeitos dos fármacos , Ratos Sprague-Dawley , Tálamo/efeitos dos fármacos , Tálamo/fisiologia , Fatores de Tempo , Córtex Visual/efeitos dos fármacos , Córtex Visual/fisiologiaRESUMO
PURPOSE: To use mini-ethnographies narrating patient illness to improve the cultural competence of the medical students. METHODS: Between September 2013 and June 2015, all sixth-year medical students doing their internship at a medical center in eastern Taiwan were trained to write mini-ethnographies for one of the patients in their care. The mini-ethnographies were analyzed by authors with focus on the various aspects of cultural sensitivity and a holistic care approach. RESULTS: Ninety-one students handed in mini-ethnographies, of whom 56 were male (61.5%) and 35 were female (38.5%). From the mini-ethnographies, three core aspects were derived: 1) the explanatory models and perceptions of illness, 2) culture and health care, and 3) society, resources, and health care. Based on the qualities of each aspect, nine secondary nodes were classified: expectations and attitude about illness/treatment, perceptions about their own prognosis in particular, knowledge and feelings regarding illness, cause of illness, choice of treatment method (including traditional medical treatments), prejudice and discrimination, influences of traditional culture and language, social support and resources, and inequality in health care. CONCLUSIONS: Mini-ethnography is an effective teaching method that can help students to develop cultural competence. It also serves as an effective instrument to assess the cultural competence of medical students.
RESUMO
Objective. The aim of this study was to examine the efficacy and safety of pulsed radiofrequency (PRF) in the treatment of chronic migraine (CM) on cervical 2-3 posterior medial branches. Methods. This randomized, double-blind, and controlled clinical trial included 40 subjects with CM, who were randomly divided into two groups: treatment (treated by PRF) and sham (treated by sham treatment). Pain intensity, headache duration (days), the Migraine Disability Assessment Questionnaire (MIDAS), and aspirin dose taken by patients were evaluated at 1, 2, and 6 months after the intervention. Side effects were observed from the time of treatment and throughout the follow-up period. Results. During the follow-up, pain intensity, headache duration (days), disability score, and the analgesic dose were significantly improved in the treatment group compared to the sham group (P < 0.001) and the baseline (P < 0.001) at all measured time points after intervention. No serious complications were reported. Conclusion. PRF on the cervical 2-3 posterior medial branches could provide satisfactory efficacy in the treatment of CM without obvious adverse effects.
RESUMO
Therapeutic outcomes of combination chemotherapy have not significantly advanced during the past decades. This has been attributed to the formidable challenges of optimizing drug combinations. Testing a matrix of all possible combinations of doses and agents in a single cell line is unfeasible due to the virtually infinite number of possibilities. We utilized the Feedback System Control (FSC) platform, a phenotype oriented approach to test 100 options among 15,625 possible combinations in four rounds of assaying to identify an optimal tri-drug combination in eight distinct chemoresistant bladder cancer cell lines. This combination killed between 82.86% and 99.52% of BCa cells, but only 47.47% of the immortalized benign bladder epithelial cells. Preclinical in vivo verification revealed its markedly enhanced anti-tumor efficacy as compared to its bi- or mono-drug components in cell line-derived tumor xenografts. The collective response of these pathways to component drugs was both cell type- and drug type specific. However, the entire spectrum of pathways triggered by the tri-drug regimen was similar in all four cancer cell lines, explaining its broad spectrum killing of BCa lines, which did not occur with its component drugs. Our findings here suggest that the FSC platform holds promise for optimization of anti-cancer combination chemotherapy.
Assuntos
Antineoplásicos/farmacologia , Avaliação Pré-Clínica de Medicamentos , Modelos Teóricos , Neoplasias da Bexiga Urinária/metabolismo , Animais , Antineoplásicos/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Modelos Animais de Doenças , Avaliação Pré-Clínica de Medicamentos/métodos , Resistencia a Medicamentos Antineoplásicos , Quimioterapia Combinada , Humanos , Camundongos , Transdução de Sinais/efeitos dos fármacos , Carga Tumoral/efeitos dos fármacos , Neoplasias da Bexiga Urinária/tratamento farmacológico , Neoplasias da Bexiga Urinária/patologia , Ensaios Antitumorais Modelo de XenoenxertoRESUMO
Xingnaojing (XNJ), is a standardized Chinese herbal medicine product derived from An Gong Niu Huang Pill. It may be involved in neuroprotection in a number of neurological disorders. Exposure to anesthetic agents during the brain growth spurt may trigger widespread neuroapoptosis in the developing brain. Thus the present study aimed to identify whether there was a neuroprotective effect of XNJ on anesthesiainduced neuroapoptosis. Sevendayold rats received treatment with 2.1% sevoflurane for 6 h. Rat pups were injected intraperitoneally with 1 or 10 ml/kg XNJ at 0.2, 24 and 48 h prior to sevoflurane exposure. The striata of neonatal rats were collected following administration of anesthesia. Western blotting and immunohistochemistry were used to analyze the expression of activated caspase 3, Bax and phosphorylated protein kinase B (pAKT) in the striatum. It was found that activated caspase 3 and Bax expression were upregulated in the striatum following sevoflurane treatment. Preconditioning with XNJ attenuated the neuronal apoptosis induced by sevoflurane in a dosedependent manner. Anesthesia reduced the expression of pAKT (phosphorylated at sites Thr308 and Ser473) and phosphorylated extracellularregulated protein kinase (pERK) in the striatum. Pretreatment with XNJ reversed the reduction in pAKT, but not pERK expression. These data suggest that XNJ has an antiapoptotic effect against sevofluraneinduced cell loss in the striatum. It thus holds promise as a safe and effective neuroprotective agent. The action of XNJ on pAKT may make a significant contribution to its neuroprotective effect.
Assuntos
Apoptose/efeitos dos fármacos , Corpo Estriado/efeitos dos fármacos , Corpo Estriado/metabolismo , Medicamentos de Ervas Chinesas/farmacologia , Neurônios/efeitos dos fármacos , Neurônios/metabolismo , Fármacos Neuroprotetores/farmacologia , Animais , Animais Recém-Nascidos , Apoptose/genética , Caspase 3/genética , Caspase 3/metabolismo , Corpo Estriado/patologia , Medicamentos de Ervas Chinesas/administração & dosagem , Feminino , Expressão Gênica , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Masculino , Éteres Metílicos/efeitos adversos , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Fármacos Neuroprotetores/administração & dosagem , Pré-Medicação , Proteínas Proto-Oncogênicas c-akt/metabolismo , Ratos , Sevoflurano , Transdução de Sinais/efeitos dos fármacos , Proteína X Associada a bcl-2/genética , Proteína X Associada a bcl-2/metabolismoRESUMO
OBJECTIVE: To investigate the effects of Yiqi Jiangzhuo Decoction (YJD) on transforming growth factor-beta1(TGF-beta1) mRNA expression in treating ventricular remodeling in viral myocarditis. METHODS: After being established into chronic viral myocarditis model by 4 times repetitively infecting with gradient multiplicative CVB3m, 160 male mice were divided into the blank group, the model group, the TCM treated group and the Western medicine treated group. On the 10th, 30th and 60th day after the last time of infection, mice were killed to observe their pathological changes of myocardium with HE staining and to detect TGF-beta1 mRNA expression in myocardial tissue with semi-quantitative RT-PCR method. RESULTS: Pathological changes of myocardium alleviated, and TGF-beta1 mRNA expression distribution area reduced significantly in the two treated groups, as compared with those in the model group (all P < 0.05). CONCLUSION: YJD could inhibit the hyperplasia and reconstruction of ECM by down-regulating TGF-beta1 mRNA expression to improve cardiac pathological changes in myocarditis, so as to prevent the occurrence of ventricular remodeling and the conversion of disease to dilative cardiomyopathy.
Assuntos
Infecções por Coxsackievirus/tratamento farmacológico , Medicamentos de Ervas Chinesas/uso terapêutico , Miocardite/tratamento farmacológico , Fator de Crescimento Transformador beta1/genética , Remodelação Ventricular/efeitos dos fármacos , Animais , Enterovirus Humano B/efeitos dos fármacos , Expressão Gênica/efeitos dos fármacos , Masculino , Camundongos , Miocardite/patologia , Miocardite/virologia , Fitoterapia , RNA Mensageiro/biossíntese , RNA Mensageiro/genética , Recidiva , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Remodelação Ventricular/genética , Remodelação Ventricular/fisiologiaRESUMO
Thy-1 nephritis (Thy-1 N), namely, anti-Thy-1 or anti-thymocyte serum (ATS) induced nephritis (ATSN), is a typical model of human mesangioproliferative glomerulonephritis. The pathologic changes of glomerular mesangial cells (GMCs) in Thy-1 N are complement-dependent, especially C5b-9 complexes, but the role of C5b-9 in the mechanism of Thy-1 N has not been defined. Because previous studies have demonstrated that sublytic C5b-9 can increase production of several inflammatory mediators from resident glomerular cells, we utilized the isolated human membrane-bound C5b-9 complexes to stimulate the cultured rat GMCs and examined whether the GMCs can also induce the synthesis of nitric oxide (NO) in vitro. Simultaneously, the effects of antiserum against rat C5b-9 and NG-monomethyl-L-arginine (L-NMMA, NO inhibitor), including interfering with the formation of C5b-9, reducing NO production and GMCs injury were observed. The results showed that sublytic C5b-9 can increase synthesis of inducible NO from the stimulated GMCs, and that the anti-C5b-9 antiserum can obviously inhibit the pathologic changes in Thy-1 N, while L-NMMA can decrease the GMCs damage although the effect is not so significant as that of the anti-C5b-9 antiserum. These findings indicate that the synthesis of NO by GMCs can be promoted by sublytic C5b-9, and that lesions of GMCs in rats with Thy-1 N are prevented by either inhibiting C5b-9 formation or NO elevation in advance. The pathologic changes of GMCs in Thy-1 N are indeed complement C5b-9-dependent, and the glomerular injury can be mediated in part through elevation of NO from the GMCs after the sublytic C5b-9 stimulation.