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1.
补肾活血方对PCOS大鼠模型卵巢中PAI-1mRNA表达的影响   总被引:2,自引:1,他引:1  
目的探讨补肾活血方对大鼠PCOS模型卵巢局部纤溶酶原激活物抑制因子-1(PAI—1mRNA)表达的影响。方法选用未成年24d龄SD雌性大鼠60只,随机分为模型组、克罗米酚组、补肾活血方高剂量组、补肾活血方低剂量组、正常对照组5组。用Bogovich法建立大鼠多囊卵巢病理模型。以克罗米酚为对照。用原位杂交法观察补肾活血方对多囊卵巢大鼠局部PAI—1mRNA的影响。结果模型组卵巢局部PAI—1mRNA存在卵泡膜间质细胞显著增高,用补肾活血方高、低剂量与克罗米酚药后,卵巢局部PAI-1mRNA的表达明显降低.差异具有统计学意义(P〈0.05、P〈0.01)。补肾活血方高剂量组与克罗米酚组比较,差异具有显著统计学意义(P〈0.01);低荆量组与克罗米酚组比较差异无统计学意义(P〉0.05),补肾活血方高、低剂量组比较,低剂量组卵泡膜间质细胞上PAI-1的基因表达增高更明显,但二者差异无统计学意义(P〉0.05)。结论PAI-1mRNA可能与多囊卵巢综合征的发病机制有关。以补肾活血立法的补肾活血方能降低多囊卵巢大鼠局部PAI—1mRNA的显著增高表达.降低PAI—1mRNA卵巢局部的作用。提示补肾活血方可能通过PAI—1mRNA途径促进卵巢排卵的机制。  相似文献   

2.
Background Genetic variations in the interferon-gamma (IFN-γ) receptor 1 gene (IFNGR1) may contribute to tuberculosis (TB) risk in different populations.Many studies have investigated the relationship between IFNGR1 56C/T polymorphism and the susceptibility to TB,but have yielded conflicting results.A comprehensive meta-analysis is needed to provide a more accurate estimation of the relationship between them.Methods A literature search based on a combination of manual and computer-based methods was conducted on four English databases (PubMed,Science Direct,SpringerLink,and EBSCO) and three Chinese databases (Wanfang,CQVIP,and Chinese National Knowledge Infrastructure databases).Pooled odds ratios (ORs) and 95% confidence intervals (95% Cls) were calculated using either the fixed-effects model or the random-effects model for different genetic models based on the heterogeneity examination.Results A total of six studies comprising 1 497 confirmed TB cases and 1 802 controls were included in this meta-analysis.Overall,no significant association was observed between IFNGR1-56C/T polymorphism and TB susceptibility (C vs.T,OR=0.90,95% Cl 0.69-1.17; CC vs.TT,OR=0.87,95% Cl 0.65-1.18; TC vs.TT,OR=-1.031,95% Cl 0.872-1.219; CC+TC vs.TT,OR=0.89,95% Cl 0.64-1.26; CC vs.TC+TT,OR=0.92,95% Cl 0.66-1.29).In subgroup analysis,a significant association was found in the dominant model (CC+TC vs.TT,OR=1.24,95% Cl 1.02-1.51) in Africans,but not in Asians or Caucasians.Conclusions Our meta-analysis did not provide enough powerful evidence to identify a significant association between IFNGR1-56C/T polymorphism and TB susceptibility in the overall population.In subgroup analysis,it indicates that IFNGR1-56C/T is possibly associated with increased TB risk in Africans,but not in Asians or Caucasians.However,larger sample size and better-designed case-control studies are needed to validate these findings.  相似文献   

3.
Objective To determine the safety and efficacy of UniPron as a reversible contraceptive.
Methods Vaginal swabs were obtained before and after UniPron administration, cultured onto appropriate culture media and bacteria identification was done based on type of media used, Gram stain reactions, colony morphology and biochemical tests. Vaginal biopsy tissues were processed using paraffin wax method, stained with hematoxylin and eosin and examined under light microscopy to determine the effect of the product on vaginal tissues. The effect of UniPron on sperm was examined by mixing the product with electroejaculated spermatozoa in vitro at different concentrations. For efficacy studies, male baboons of proven fertility were mated with UniPron treated or untreated females of proven fertility during the fertile stages.
Results All the five females (100%) that were treated with UniPron did not conceive and they regained total fertility when the treatment was stopped while all the controls conceived. At a concentration of 40%, UniPron completely immobilized spermatozoa in an in-vitro system. UniPron mechanism of action was by lowering the vaginal pH and on application in baboon, the pH was lowered for at least 3 h after which it went back to normal.
Conclusions As we plan for a study to test UniPron as a microbicide to prevent STIs including HIV, our current study has established that this novel product is effective in contraception and harmless to vaginal tissues and vaginal microbial flora in a baboon model (Papio anubis).  相似文献   

4.
Objective Diabetic nephropathy (DN) is the major cause of end-stage renal disease worldwide and its prevalence continues to increase.Currently,therapies for DN provide only partial renoprotection; hence new targets for therapeutic intervention need to be identified.In this review,we summarized the new target,sphingosine kinase-1/sphingosine 1-phosphate (SphK1/S1P) pathway,explored its potential therapeutic role in the prevention and treatment of DN.Data sources Most relevant articles were mainly identified by searching PubMed in English.Study selection Mainly original articles and critical review articles by major pioneer investigators in this field were selected to be reviewed.Results SphK1/S1P pathway can be activated by hyperglycemia,advanced glycation end products,and many proinflammatory cytokines,which leads to fibronectin,transforming growth factor-31 up-regulation and AP-1 activation.And then it could promote glomerular mesangial cells proliferation and extracellular matrix accumulation,mediating the initiation and progression of diabetic renal fibrosis.Conclusions SphK1/S1P pathway is closely correlated with the pathogenesis of DN.The results suggest that SphK1/ S1P pathway as a new target for clinically improving DN in future is of great prospect.  相似文献   

5.
OBJECTIVE: In continuation to the growing evidence for therapeutical potential of Desmostachya bipinnata (Linn) Stapf, the current pharmacological study was carried out to evaluate the diuretic and laxative activity of its hydro-alcoholic extract in rats. METHODS: The hydro-alcoholic extract of D. bipinnata whole plant was prepared by using Sox- hlet extractor and subjected to analysis by standard preliminary phytochemical tests. Evaluation of both diuretic and laxative activity was carried out using standard methods as reported earlier. Frusemide (20 mg/kg) was served as positive control for diuretic activity and sennosides (10 mg/kg) served as negative control for laxative activity. RESULTS: The hydro-alcoholic extract showed significant diuretic activity and was found to be the most potent in increasing the urinary output at 500 mg/kg when the effect was compared with that of the standard frusemide (P〈0.01). Moreover, this extract was found to be most effective in increasing urinary electrolyte concentration (Na+, K+, and Cl-) at both doses tested. Whereas the results for laxative activity showed minimal increase of feces output at the dose of 500 mg/kg and the increase was negligible when compared with that of the standard drug sennosides. CONCLUSION: Altogether, the above significant findings validate and support its folkloric diuretic use and lend pharmacological credence to the ethno-medical use of this plant in traditional system of medicine, which demands further studies to investigate its active constituents, as well as its use and safety.  相似文献   

6.
Background Chondrocytes' phenotype and biosynthesis of matrix are dependent on having an intact cytoskeletal structure.Microfilaments,microtubules,and intermediate filaments are three important components of the cytoskeletal structure of chondrocytes.The aims of this study were to determine and compare the effects of the disruption of these three cytoskeletal elements on the apoptosis and matrix synthesis by rabbit knee chondrocytes in vitro.Methods Chondrocytes were isolated from full-thickness knee cartilage of two-month-old rabbits using enzymatic methods (n=24).The isolated cells were stabilized for three days and then exposed to low,medium,and high doses of chemical agents that disrupt the three principal cytoskeletal elements of interest:colchicine for microtubules,acrylamide for intermediate filaments,and cytochalasin D for actin microfilaments.A group of control cells were treated with carrier.Early apoptosis was assessed using the Annexin-FITC binding assay by flow cytometry on days 1 and 2 after exposure to the disrupting chemical agents.The components and distribution of the cytoskeleton within the cells were analyzed by laser scanning confocal microscopy (LSCM) with immunofluorescence staining on day 3.The mRNA levels of aggrecan (AGG) and type Ⅱ collagen (Col-2) and their levels in culture medium were analyzed using real-time PCR and enzymelinked immunosorbent serologic assay (ELISA) on days 3,6,and 9.Results In the initial drug-dose-response study,there was no significant difference in the vitality of cells treated with 0.1 μmol/L colchicine,2.5 mmol/L acrylamide,and 10 μg/L cytochalasin D for two days when compared with the control group of cells.The concentrations of colchicine and acrylamide treatment selected above significantly decreased the number of viable cells over the nine-day culture and disrupted significantly more cell nuclei.Real-time PCR and ELISA results showed that the mRNA levels and medium concentrations of AGG and Col-2 were significantly decreased for  相似文献   

7.
Background Pericytes,located on microvessels,help to maintain vascular stability and blood-brain barrier integrity.The influence of pericytes on microvessels after spinal cord injury (SCI) is less clear.Therefore,the aim of this study was to investigate whether pericytes took a protective effect on microvessels in melatonin-treated SCI.Methods C57BL/6 mice were randomly divided into three groups:sham group,SCI group,and melatonin group (n=27per group).Functional recovery was evaluated using the Basso Mouse Scale.Motor neurons were observed using hematoxylin and eosin staining.Pericyte coverage was analyzed using immunofluorescence.Permeability of blood-spinal cord barrier (BSCB) was assessed by administration of Evan's Blue.Protein levels of occludin,aquaporin-4 (AQP4),angiopoietin-1 (Ang1),intercellular cell adhesion molecule-1 (ICAM-1),Bcl-2,and Bax were determined using Western blotting.Mimicking the pathological conditions of SCI,melatonin-treated primary pericytes were subjected to oxygenglucose deprivation/reperfusion (OGD/R).Secretion of Ang1 was analyzed using an enzyme-linked immunosorbent assay,and the expression of ICAM-1 was detected by immunofluorescence.Results Melatonin treatment improved locomotor functional outcome and rescued motor neurons.Pericyte coverage was significantly reduced after SCI; melatonin treatment alleviated the loss of pericyte coverage and rescued perfused microvessels 7 days after injury.The permeability of BSCB and loss of occludin were attenuated,and edema formation and upregulation of AQP4 were inhibited,after melatonin treatment.The expression of Ang1 and Bcl-2 was improved,while the expression of ICAM-1 and Bax was inhibited,in melatonin-treated SCl mice.Furthermore,the secretion of Ang1 was increased and the expression of ICAM-1 was inhibited in melatonin-treated pericytes after OGD/R.Conclusions Melatonin ameliorated the loss of blood vessels and disruption of BSCB to exert a protective effect on SCI,which might be mediated by increased p  相似文献   

8.
OBJECTIVE: To investigate the anti-inflammatory, anti-oxidative stress, and adipokine-ameliorating effects of Liuwei Dihuang (LWDH), a traditional Chinese herbal formula, in obese rats. METHODS: After 2 weeks of acclimation with free access to regular rodent chow and water, obese-prone-caesarean-derived (OP-CD) rats were fed a modified AIN-93G diet containing 60% energy from fat. Treatment was performed twice daily by gavage feeding with 500, 1 500, or 3 500 mg/kg body weight LWDH suspended in water (n=12 rats per group). Twelve obese-resistant-CD (OR-CD) rats were fed the atherogenic diet and gavaged with water, and served as the normal control. Blood biomarkers of inflammation, oxidative stress and adiponectin were measured post-sacrifice and used to determine the treatment effect of LWDH and assess the suitability of OR/OP-CD rats for studying these parameters. RESULTS: After 9 weeks of treatment, LWDH lowered serum C-reactive protein (CRP) and tumour necrosis factor-α (TNF-α) levels. Serum interleukin-6 (IL-6) levels showed a tendency towards reduction, but were not significantly different from the OP-CD control. Liver superoxide dismutase (SOD) activity was increased in response to all three doses of LWDH, while the levels of reduced (GSH) and oxidized glutathione (GSSG) and thiobarbituric acid reactive substances (TBARS) were unchanged. Serum adiponectin levels were increased in response to oral administration of LWDH at the dose of either 500 or 1 500 mg/kg body weight. In addition, comparisons between OR-CD and OP-CD rats revealed differential, and for some biomarkers, conflicting characteristics of high-fat diet-fed OP-CD rats in reference to obese human subjects in terms of inflammatory and oxidative stress biomarkers and circulating adiponectin levels. CONCLUSION: The results show, for the first time, the anti-inflammatory, anti-oxidative stress and adiponectin-ameliorating effects of LWDH in obese rats. The suitability of the OP-JOP-CD rat model as  相似文献   

9.
Objective: To study effects of behavior training on learning, memory and the expression of NR2B, GluR1 in hippocampus of rat' s offspring with fetal growth restriction(FGR). Methods: The rat model of FGR was established by passive smoking method. The rats offspring were divided into the FGR group and the control group, then randomly divided into the trained and untrained group, respectively. Morris water maze test was proceeded on postnatal month(PM2/4) as a behavior training method, then the learning-memory of rats was detected through dark-avoidance and step-down tests. The expressions of NR2B and GluR1 subunits in hippocampal CA1 and CA3 areas were detected by immunohistochemical method. Results: In the dark-avoidance and step-down tests, the performance record of rats with FGR was worse than that of control rats, and the behavior-trained rats was better than the untrained rats, when the FGR model and training factors were analyzed singly. The model factor and training factor had significant interaction(P 〈 0.05). The expressions of NR2B and GluR1 subunits in hippocampal CA1 and CA3 areas of rats with FGR reduced. In contrast, the expressions of GluR1 and NR2B subunits in CA1 area of behavior-trained rats increased, when the FGR model and training factors were analyzed singly. Conclusion: These findings suggested that the effect of behavior training on the expressions of NR2B and GluR1 subunits in CA1 area should be the mechanistic basis for the training-induced improvement in learning-memory abilities.  相似文献   

10.
Background Previous studies have shown that prostaglandins (PGs) dramatically stimulate healing processes in bone.However,the effect of prostaglandin l2 (PGI2) on fracture healing remains unclear.To investigate the effect of PGI2,a study on fracture healing process in closed tibia fractures was designed.Methods Thirty-six Sprague-Dawley male rats were randomized into two groups.On the first day,their right tibias were fractured by three-point bending technique.The study group (n=18) received a single injection of 10 μg/kg iloprost for 5 days,while the control group (n=18) received saline solution in the same way.On the 7th,14th and 28th days following the fracture,six rats were sacrificed and their right legs were harvested in each group.The progression of fracture healing was assessed for each specimen by the scores of radiography (by Lane-Sandhu) and histology (by Huo et al).Results On the 7th day,the radiographic and histologic scores were equal.On the 14th day radiographic total score was 6 and histologic total score was 23 in the iloprost group,whereas radiographic total score was 11 and histologic total score was 33 in the control group.On the 14th day radiographic and histologic scores were significantly decreased in the iloprost group compared to the control group (P 〈0.05).On the 28th day radiographic total score was 12 and histologic total score was 37 in the iloprost group,whereas radiographic total score was 15 and histologic total score was 40 in the control group.On the 28th day although there was a decrease in radiographic and histologic scores of the iloprost group acording to control group,it was not statistically significant (P 〉0.05).Conclusion Iloprost delays fracture healing in early stage in rats.  相似文献   

11.
Objective To study the effect of Shenfu on the expression of bax and bcl-2 in small intestinal mucosal epithelial cells after ischemic reperfusion injury and explore the effect of Shenfu on small intestinal mucosal epithelial cells apoptosis. Methods 36 SD rats were randomized into three groups, each consisting of 12 rats: Sham group (S group), Ischemic reperfusion group (IR group), Shenfu group (SF group), Ischemic reperfusion models were made by ligated the superior menseneric artery for 1 hour followed by 2 hrs reperfusion. Histological mucosal damage in each group was graded according to Chiu's score. Immunohistochemistry detected the expression of bax and bcl-2, and obtained the optical density (OD) value using a color image pattern analysis system, and then calculated the ratio of bcl-2/bax. TUNEL method measured apoptotic intestinal mucosal epithelial cells, and calculated the apoptotic index. Results There were edema and epithelial impairment in part of villus and the integral was higher in SF group than S group (P〈0.05), but lower than IR group (P〈0.01). Compared IR group with S group and SF group, the average OD value of bcl-2 and bax had significant statistic difference (P〈0.01), and the average OD value of bcl-2 in SF group was higher than in S group (P〈0.05), meanwhile bcl-2/bax was significantly lower in IR group than in S group and SF group (P〈0.01), but that was higher in SF group than in S group (P〈0.05). Apoptotic index in IR group was significantly higher than that in other two groups (P〈0.01), and that in SF group was higher than in S group (P〈0.05). Conclusion Shenfu can enhance the expression of bcl-2, decrease the expression of bax, meanwhile increase the ratio of bcl-2/bax, inhibit small intestinal mucosal epithetlial cells apoptosis, and protect small intestine mucosal epithetlial after ischemic reperfusion.  相似文献   

12.
目的观察益气养阴活血通络之糖络方联合弥可保治疗2型糖尿病周围神经病变的疗效。方法将65例患者随机分成治疗组(中西药组)和对照组(西药组),均在西药降血糖基本达标的同时,对照组单纯口服弥可保,治疗组口服弥可保的基础上加用糖络方内服,治疗8周。结果总有效率及治疗后证候积分比较,治疗组优于对照组,差异有统计学意义(P〈0.05);治疗后肌电图比较,治疗组优于对照组,差异有统计学意义(P〈0.01)。结论益气养阴活血通络之糖络方联合弥可保治疗2型糖尿病周围神经病变疗效优于单用弥可保,是治疗该病的有效方剂之一。  相似文献   

13.
Pancreatic cancer is one of the malignant tumor with a very poor prognosis. Both genetic and epigenetic alterations are involved in the pathogenetic mechanisms of pancreatic cancer. Hypermethylation and subsequent loss of expression of some tumor suppressor genes and tumor-related genes occur frequently in pancreatic cancer, such as loss of expression of p16, ^1RASSF1A,^2 SOCS-1,^3 and hMLH1^4 genes were repoted.  相似文献   

14.
The study was designed to investigate the potential mechanism of herb-herb interaction between ginseng and Trogopterus (Trg) based on Cytochrome P450 isozymes (CYPs) in rat livers. We estimated the influence on CYP1A2, CYP2E1, and CYP3A1/2 activity caused by ginseng and Trg used in combination. The CYP1A2 and CYP2E1 enzyme activity were induced by ginseng and Trg used in combination. And this induction effect was caused via inducing CYP1A2 and CYP2E1 protein expression which was supposed caused by inducing the gene expression of CYP1A2 and CYP2E1.  相似文献   

15.
目的观察益智健脑颗粒联合针灸对阿尔茨海默病(Alzheimers disease,AD)大鼠学习记忆的影响。方法将大鼠随机分为假手术组(A组)、模型组(B组)、针灸组(C组)、益智+针灸组(D组)各10只,B、C、D 3组分别以海马CA1区注射β淀粉样蛋白25-35(Aβ25-35)造模,A组注射等量的双蒸水,各组分别治疗20 d后行Morris水迷宫试验,观察大鼠学习记忆能力变化。结果B组较A组的平均潜伏期明显延长,差异具有统计学意义(P〈0.05);与B组比较,C组、D组的平均潜伏期明显缩短,过台次数增多,差异具有统计学意义(P〈0.05,P〈0.01);与C组比较,D组的潜伏期缩短,过台次数增多,差异具有统计学意义(P〈0.05)。结论益智健脑颗粒联合针灸能够提高Aβ25-35介导的AD模型大鼠的学习记忆能力。  相似文献   

16.
Objective To investigate the pro-apoptotic effect of scFv-mediated delivery of caspase-6 fusion protein on osteosarcoma E 10 cells. Methods The expression of human epidermal growth factor receptor-2 (Her-2) in osteosarcoma cell line E10 was examined by flow cytometry analysis. ScFv-mediated delivery of caspase-6 was generated by sequential fusion of the genes of a signal peptide, a single-chain Her-2 antibody (e23sFv), a PEA translocation domain (PEA aa253-264), and an recombinant caspase-6. The pCMV-immunocaspase-6 was produced by cloning above mentioned fusion genes into pCMV plasmid, and then pCMV-immunocaspase-6 plasmid mixed cationic liposome was transfected into E10 cells. The expression of fusion gene on transfected E10 cells was detected by immunocytochemical staining, The pro-apoptotic effects of fusion gene expression on morphology and growth status of E10 cells were observed by trypan blue cell staining, electron microscopy and MTT assay. Results The fusion protein was detected in the cytoplasm of the transfected E10 cells. These cells presented typical characteristics of apoptosis as detected by electron microscopy. MTT assay revealed that the proliferation of transfected E10 cells was suppressed than that of non- or mock-transfected cells (P〈0.01). Conclusion ScFv-mediated delivery of caspase-6 fusion protein can induce apoptosis of Her-2 positive osteosarcoma E10 cells, suggesting the potential of this strategy for the treatment of human high-grade osteosarcoma.  相似文献   

17.
精、神、气、血、津、液是中医理论中6个非常重要的概念,有关术语在《WHO西太区传统医学国际标准名词术语》中一共收录了59条,“世界中医药学会联合会”(以下简称世中联)《中医基本名词术语中英对照国际标准》中收录了58条。血、津、液的内涵较为具体,有一定的物质基础,理解并不困难。翻译上虽有差异,但亦不难统一。精、神、  相似文献   

18.
做好医院感染的预防和控制工作,提高医疗水平,是当今许多医院亟待解决的问题,我们的主要做法如下。1建立健全管理组织遵照《医院感染管理规范》要求,建立了医院感染管理体系,即:医院感染管理委员会,医院感染管理科,临床科室医院感染管理小组,设兼职医生护士组成了医院感染三级监控系统,加大其管理的力度,每月每季按时活动,发挥医院感染科的组织管理和业务技术指导作用,体现管理的作用。在管理工作中,明确了各级各类人员的职责和任务,进行医院感染监控、管理、信息反馈和交流,达到了既分工明确又团结协作,形成了一个尽职尽责的整体管理体系。2建立健全规章制度依据《医院感染管理办法》和《医院消毒技术规范》的要求,制定了医院感染管理规划、工作计划、医院感染控制方案、综合目标考核方案、重点部门的感染控制制度及全面工作制度(40条),使我院的医院感染管理工作有章可循,有法可依,目标明确,责任到位。3加强医院感染知识培训专职人员参加国家及省级培训学习后,为加强全院各类人员对医院感染管理的监控意识,我们分别组织医疗、医技、医院感染监测与控制@段伟辉$夏县人民医院!山西夏县044400 @徐素云$夏县人民医院!山西夏县044400医院感染;;管理...  相似文献   

19.
钟文昭  吴一龙 《循证医学》2008,8(4):193-197
以表皮生长因子受体酪氨酸激酶抑制剂(epidermal growth factor receptor-tyrosine kinase inhibitor,EGFR-TKI)分子靶向治疗研究为肇始,转化性研究使基础实验和临床实践间的鸿沟迅速填平,改变着人们认识治疗肺癌的视角。无可否认,EGFR-TKI上市后极大地延伸了肿瘤学家治疗肺癌的手段,但不管从临床经验、临床研究数据、分子生物学层面还是文献计量学的角度,  相似文献   

20.
“脏腑”是中医基本理论中的一个重要方面,其基本概念和用语为中医名词术语的核心内容,反映了中医翻译的基本问题。对这方面术语的翻译和标准化问题的讨论,有利于我们进一步明确中医翻译的基本理论与方法。《WHO西太区传统医学国际标准名词术语》中共收录有关脏腑的术语83条,  相似文献   

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