0.05). Conclusion The rapid paper strip method could be applied as the rapid method for monitoring the fecal colifom group in surface water.

Objective To evaluate regenerative nerve and functional recovery of target muscle in rats with sciatic nerve defect bridged by acellular nerve allograft made through chemical extraction.Methods Sciatic nerve of SD rats was processed in a volume fraction of 3％ Triton X-lO0 solution and 40 g/L sodium deoxycholate solution.Morphology of myelin sheath,axons and basal lamina tubes of sciatic nerve segments was observed under the light microscopy before and after the chemical processing.Twenty-five Wistar rats were divided into acellular nerve allograft group (n =10),autograft group (n =10) and normal control group(n =5) according to the random number table.A 1 cm sciatic nerve defect was created in acellular nerve allograft group and autograft group,and was respectively bridged by acellular nerve allograft and autograft.Sciatic nerve function index (SFI) was measured every two weeks.Twelve weeks after surgery,nerve conduction velocity (NCV),recovery rate of compound muscle action potential (CMAP) and recovery rate of muscle force were measured in each group.Results Cellular components including myelin sheath and axons were removed thoroughly,but the basal lamina tubes were preserved completely.At postoperative 2,4,6,8,10 and 12 weeks,SFI in normal control group (-1.7±5.9,-0.3 ±2.5,0.8 ±4.1,-1.4±3.6,-2.5 ±5.7 and-2.1±3.2) was superior over autograft group (-94.3±3.7,-90.1±4.1,-63.7±7.8,-51.9±8.2,-48.8±8.6 and -44.3 ± 10.5) and acellular nerve allograft group (-97.1 ± 5.3,-91.2 ± 6.1,-70.6 ± 5.5,-60.4±6.2,-58.2 ±10.2 and-56.4 ±8.0) (P ＜0.01).At postoperative 6,8,10 and 12 weeks,SFI in autograft group were better than those in acellular nerve allograft group (P ＜0.05).NCV [(61.6 ± 8.1) m/s],recovery rate of CMAP[(98.7 ± 5.9) ％] and recovery rate of muscle force [(101.8 ± 6.6) ％] in normal control group were higher than those in acellular nerve allograft group [(22.3 ± 4.7) m/s,(40.3 ± 9.2) ％ and (43.8 ± 9.3) ％] and those in autograft group [(29.0 ±5.5) m/s,(52.5 ± 10.6) ％ and (54.3 ± 10.5) ％] (P ＜ 0.01).NCV,recovery rate of CMAP and recovery rate of muscle force in autograft group were better than those in acellular nerve allograft group (P ＜ 0.05).Conclusions Acellular nerve segments are harvested satisfactorily by chemical extraction.Sciatic nerve defect in rats can be cured with the acellular nerve allograft,but the repair effect of autograft is relatively better.

Objective To observe changes of erythropoietin (EPO) and rheology in moderate and severe obstructive sleep apnea hypopnea syndrome (OSAHS) patients after the noninvasive positive pressure ventilation (NPPV) treatment. Methods Healthy adults were selected as control group (n=40) while moderate to severe OSAHS patients were selected as OSAHS group. OSAHS group was underwent NPPV treatment then, Levels of sleep apnea hypopnea index (AHI), sleep mean minimum oxygen saturation (LSaO2) and serum erythropoietin (EPO) were assessed, routine blood test and hemodynam-ic indexes were also checked before treatment and 1 and 3 months after treatment in both groups. Results In both groups serum EPO, blood, blood rheology indexes, AHI, LSaO2 were analysised at each time point by ANOVA repeated measures, all of which show significant different between groups and between each time points within the same group. Indexes in OSAHS group improved with prolonged treatment , but they are in the normal range in the control. Conclusion OSAHS pa-tients with NPPV therapy can significantly relieve hypoxia, reduce serum EPO level and blood viscosity. So NPPV has impor-tant clinical significance in prevention and treatment of OSAHS.

To study the effect of cholesterol and 25-OH-cholesterol on cholesterol metabolism in HepG2 cells and the effect of coptisine (Cop) extracted from Coptidis Rhizoma (CR) in reducing and regulating cholesterol. In this study, TC, TG, LDL-c and HDL-c were measured by biochemical analysis; mRNA and protein expressions of LDLR, HMGCR and CYP7A1 were detected by qRT-PCR and Western blot. According to the results, cholesterol and 25-OH-cholesterol inducing could decrease in mRNA and protein expressions of LDLR and CYP7A1, so as to increase TC and LDL-c contents. However, Cop could up-regulate mRNA and protein expressions of LDLR and CYP7A1 and down-regulate that of HMGCR, so as to reduce TC and LDL-c levels. These findings suggested that Cop has potential pharmacological activity for reducing cholesterol, and may reduce cholesterol by regulating mRNA and protein expressions of key genes involved in cholesterol metabolism, such as LDLR, CYP7A1 and HMGCR. This study laid a firm theoretical foundation for developing new natural drugs with the cholesterol-lowering activity.
Berberine ; analogs & derivatives ; pharmacology ; Cholesterol ; metabolism ; Cholesterol 7-alpha-Hydroxylase ; genetics ; metabolism ; Drugs, Chinese Herbal ; pharmacology ; Gene Expression Regulation, Enzymologic ; drug effects ; Hep G2 Cells ; Humans ; Hydroxymethylglutaryl CoA Reductases ; genetics ; metabolism ; Receptors, LDL ; genetics ; metabolism ; Triglycerides ; metabolism

This paper investigates the effect of myricetin (MYR) on renal fibrosis induced by unilateral ureteral obstruction (UUO) and common bile duct ligation (CBDL) in mice and its mechanism. The animal experiment has been approved by the Ethics Committee of China Pharmaceutical University (NO: 2022-10-020). Thirty-five ICR mice were divided into control, UUO, UUO+MYR, CBDL and CBDL+MYR groups. H&E and Masson staining were used to detect pathological changes in kidney tissues. Western blot (WB) was used to detect the expression of fibrosis-related proteins in renal tissue, and total superoxide dismutase (SOD) activity detection kit (WST-8) was used to detect the changes of total SOD in renal tissue of CBDL mice. In vitro, HK-2 cells and transforming growth factor beta 1 (TGF-β1, 10 ng·mL^-1) were used to induce fibrotic model, and high glucose (30 mmol·L^-1) was used to induce oxidative stress model, and then treated with different concentrations of MYR, WB was used to detect the expression of fibrosis and oxidative stress-related proteins, while NIH/3T3 cells were treated with different concentrations of MYR, and their effects on cell proliferation were detected by 5-bromo-2′-deoxyuridine (Brdu). The results showed that the renal lesions in UUO group and CBDL group were severe, collagen deposition was obvious, the expression of collagen-Ⅰ (COL-Ⅰ), α-smooth muscle actin (α-SMA), fibronectin (FN), vimentin and plasminogen activator inhibitor-1 (PAI-1) protein was up-regulated, and the activity of SOD enzyme in CBDL group was significantly decreased. MYR partly reversed the above changes after treatment. MYR inhibited the proliferation of NIH/3T3 cells but had no effect on the proliferation of HK-2 cells, and decreased the upregulation of PAI-1, FN and vimentin in HK-2 cells stimulated by TGF-β1. MYR can also up-regulate the down-regulation of nuclear factor erythroid 2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) in HK-2 cells stimulated by high glucose. To sum up, MYR can improve renal fibrosis in vivo and in vitro, probably by inhibiting the proliferation of fibroblasts and activating Nrf2/HO-1 signal pathway to inhibit oxidative stress.

Carrier State ; virology ; Female ; Hepatitis B ; complications ; Humans ; Lymphoma, Large B-Cell, Diffuse ; virology ; Male ; Middle Aged

Objective To investigate the relationship between genetic polymorphisms in nucleotide excision repair gene excision repair cross complementing group 6(ERCC6),xeroderma pigmentosum group A(XPA) and coal-burning-borne-arsenism in Guizhou Province.Method ERCC6 A3368G,ERCC6 C-6530G and XPA A23G gene polymorphisms were analyzed by polymerase chain reaction restriction fragment length polymorphism technique(PCR-RFLP) of 205 cases which were chosen as patients with arsenism and 187 residents as control group.Results The distributions of ERCC6 A3368G,ERCC6 C-6530G and XPA A23G in the case group were not statistically significant compared with those of the control group(x2 =3.209,2.963,3.335,all P ＞ 0.05); individuals carrying G allelomorphic gene(AG + GG) had a lower risk than individuals carring A allelomorphic gene(ORadj =0.282,95％CI:0.126-0.628,P =0.002); relationship was not found between single genetic polymorphisms of ERCC6 C-6530G,XPA A23G and coal-burning-borne-arsenism; the risk of arsenism was decreased for individuals carrying the following five genotypes combination:ERCC6 A3368G(AG + GG) genotype and ERCC6 C-6530G CC genotype(ORadj =0.287,95％CI:0.087-0.946,P=0.040); ERCC6 A3368G(AG + GG) genotype and ERCC6 C-6530G(CG + GG) genotype (ORadj =0.226,95％CI:0.077-0.661,P =0.007); ERCC6 A3368G(AG + GG) genotype and XPA A23G AA genotype (ORadj =0.150,95％CI:0.038-0.596,P =0.007); ERCC6 A3368G (AG + GG) genotype and XPA A23G(AG + GG) genotype(ORadj =0.325,95％CI:0.118-0.897,P =0.030) ; ERCC6 C6530G (CG + GG) genotype and XPA A23G AA genotype (ORadj =0.397,95％CI:0.162-0.975,P=0.036).Conclusions Individuals carring ERCC6 A3368G (AG + GG) genotype have a low risk of arsenism.There are five genotypes combination of three gene polymorphisms in two genes,ERCC6 and XPA,which may reduce the risk of coal-burning-borne-arsenism.

Objective To investigate the infect capability of recombinant adenovirus mediated PDGF to human umbilical cord derived mesenchymal stem cells (MSCs). Methods The PDGF cDNA sequence was amplified with RT-PCR and constructed recombinant adenovirus vector AdPDGF. The human umbilical cord derived MSCs were isolated and cultured. In vitro AdPDGF infected MSCs with various MOI,and determine the efficiency using FACS and fluorescence microscope. Trypan blue and MTT assay was used to detect cell viability and proliferation. ELISA was used to quantify PDGF secretion. Results Recombinant adenovirus AdPDGF was successfully and constructed,in which infection efficiency to MSCs was dose dependent. The highest efficiency was around 87.36 % when MOI =50,at which cell viability and proliferation wasn' t impaired. Cell viability of uninfected,AdPDGF infected and control virus infected MSCs was (97.8 ±2.3) %,(91.9±4.0) % and (92.8±4.0) %,separately. The cell proliferation was (100±16.8) %,(95.9±12.0) % and (87.5±9.7) %,separately. There was no statistic significance among AdPDGF infected,control virus infected and uninfected MSCs. 48 hrs post infection,PDGF secretion can be measured from infectious MSCs' supernatant. The secretion level was (1.53±0.37),(3.03±0.68) and (5.25±0.92) ng/ml,separately,when MOI= 10,30,50. No PDGF can be detected from MSC-GFP and control MSC group. Conclusion Recombinant adenovirus AdPDGF was constructed and can infect human umbilical cord derived MSC at high efficiency.

Objective　To investigate the expression of HGF and TGF-α and their receptor, Met (HGF receptor) and EGFR (TGF-αreceptor) mRNA, in the regenerative liver/hepatocytes after 70% partial hepatectomy (70% PH) in noncirrhotic biliary obstruction rats. Methods　Wistar rats were divided randomly into N-PH group, BDO-RBF-PH group and BDO-RBF group. The expression of HGF/Met mRNA and TGF-α/EGFR mRNA was measured by RT-PCR in the liver/hepatocytes at the time point of 0, 6, 12, 24, 48 and 72 h after 70% PH or RBF. Results　In N-PH group, the expression of HGF/Met mRNA increased sharply and peaked at 6 h, and maintained at a high level until 24 h after 70% PH. In BDO-RBF-PH group however, the expression of HGF/Met mRNA increased slowly and peaked at 12 h after 70% PH. The peak level was lower in BDO-RBF-PH group than in N-PH one. The expression of TGF-α/EGFR mRNA increased sharply and peaked at 24 h after 70% PH in N-PH group. However, the expression of TGF-α/EGFR mRNA elevated slowly and peaked at 48 h after 70% PH in BDO-RBF-PH group with a lower peak level than that in N-PH group. Conclusion　The expression of HGF/Met mRNA and TGF-α/EGFR mRNA in the regenerative liver/hepatocytes after 70% PH decreases significantly in noncirrhotic biliary duct obstruction rats. There is a tendency that the expression of HGF mRNA and TGF-α mRNA is less than Met mRNA and EGFR mRNA.

Objective To explore the killing effect of dielectric barrier discharge (DBD) plasma on tumor cells and to analyze the DBD-induced apoptosis mechanism.Methods Thiazolyl blue tetrazolium bromide (MTT) assay method was used to detect the killing effect of low temperature plasma on the cytotoxicity of normal spleen leukocytes and acute promyelocytic leukemia cells (LT-12) at different doses.The changes of reactive oxygen species (ROS) level were measured after plasma treatment.The cell apoptosis rate was detected by Annexin V/PI double staining at different doses.The expression of apoptosis-related genes and proteins was detected by qRT-PCR and Western Blot.Results MTT results showed that the killing effect of plasma treatment was dose-dependent and time-dependent.The cell survival rate after 8 hours of treatment decreased from 98％ to 63％ with the dose increasing from 30 s to 240 s.The survival rate decreased from 78％ (2 h) to 39％ (24 h) after the treatment with a same dose (e.g.240 s).Annexin V/PI double staining results demonstrated that the plasma effect can induce apoptosis,and the apoptosis rate was not only positively correlated with the plasma dose,but also with the post-plasma time.The longer the post-plasma time,the higher was the apoptosis rate.The apoptotic rate of the 60 s dose treatment after 12 h was 48％ that increased to 55.3％ with the dose of 120 s.The production of reactive oxygen species (ROS) detected by flow cytometry also showed a time correlation of the plasma treatment.After the plasma treatment,the ROS level immediately increased to 1.24 times,and sharply increased to 5.39 times after 20 h post-plasma.The experimental results of qRT-PCR and Western blot showed that the expression of the genes and proteins of Caspase family and Bcl-2 family was very active at 8 to 12 h post-plasma treatment.Conclusions Low-temperature plasma can effectively kill tumor cells,and apoptosis is the main mechanism of death.The molecular mechanism of apoptosis of tumor cells induced by low temperature plasma was preliminary confirmed.