Potassium Bromate-induced Changes in the Adult Mouse Cerebellum Are Ameliorated by Vanillin / 生物医学与环境科学（英文）

OBJECTIVE@#The current study aimed to elucidate the effect of vanillin on behavioral changes, oxidative stress, and histopathological changes induced by potassium bromate (KBrO3), an environmental pollutant, in the cerebellum of adult mice.@*METHODS@#The animals were divided into four groups: group 1 served as a control, group 2 received KBrO3, group 3 received KBrO3 and vanillin, and group 4 received only vanillin. We then measured behavioral changes, oxidative stress, and molecular and histological changes in the cerebellum.@*RESULTS@#We observed significant behavioral changes in KBrO3-exposed mice. When investigating redox homeostasis in the cerebellum, we found that mice treated with KBrO3 had increased lipid peroxidation and protein oxidation in the cerebellum. These effects were accompanied by decreased Na+-K+ and Mg2+ ATPase activity and antioxidant enzyme gene expression when compared to the control group. Additionally, there was a significant increase in cytokine gene expression in KBrO3-treated mice. Microscopy revealed that KBrO3 intoxication resulted in numerous degenerative changes in the cerebellum that were substantially ameliorated by vanillin supplementation. Co-administration of vanillin blocked the biochemical and molecular anomalies induced by KBrO3.@*CONCLUSION@#Our results demonstrate that vanillin is a potential therapeutic agent for oxidative stress associated with neurodegenerative diseases.

Expression of pyrrole drugs resistance genes in Candida albicans from genital tract / 国际检验医学杂志

Objective To explore the expression of resistance genes in pyrrole resistant Candida albicans from genital tract . Methods The Candida albicans were isolated from the vaginal secretions of 93 vaginitis patients ,and Kirby-Bauer method was per-formed for preliminary culture of strains resistant .The total RNA was extracted from pyrrole-resistant and susceptible Candida al-bicans isolated by pyrolysis method and cDNA was synthesized .The expression of CDR1 ,CDR2 ,MDR1 genes was then detected by Real-time quantitative PCR .Results A total of 59 strains of Candida albicans ,18 strains of Candida tropicalis ,10 strains of Candida krusei and 6 strains of Candida glabrata were cultured .37 strains of Candida albicans were resistant to fluconazole ,ketoconazole ,and miconazole at different degrees ,and the drug resistance rates were 16 .7% ,18 .3% ,51 .7% ;CDR1 gene′s 2 -△ △ Ct in sensitive strains group was 1 .09 ± 0 .27 ,while resistant strains group was 1 .46 ± 0 .24 ,there was significant difference between two groups (t =- 4 .22 ,P= 0 .001) .There was no significant difference in the expression of CDR2 and MDR1 genes between the sensitive and re-sistant strains(P= 0 .170 ,P= 0 .800) .Conclusion The drug resistance of Candida albicans mechanism is complicated ,it might be associated with high CDR1 expression ,the relationship between CDR2 ,MDR1 expression and multidrug resistance needs further study .

Hepato-protective effect of rutin via IL-6/STAT3 pathway in CCl4-induced hepatotoxicity in rats

BACKGROUND: Carbon tetrachloride (CCl4) induces hepatotoxicity in animal models, including the increased blood flow and cytokine accumulation that are characteristic of tissue inflammation. The present study investigates the hepato-protective effect of rutin on CCl4-induced hepatotoxicity in rats. RESULTS: Forty male Wistar rats were divided into four groups. Group I (control group) received 1 mL/kg of dimethyl sulfoxide intragastrically and 3 mL/kg olive oil intraperitoneally twice a week for 4 weeks. Group II received 70 mg/ kg rutin intragastrically. Groups III and IV received CCl4 (3 mL/kg, 30 % in olive oil) intraperitoneally twice a week for 4 weeks. Group IV received 70 mg/kg rutin intragastrically after 48 h of CCl4 treatment. Liver enzyme levels were determined in all studied groups. Expression of the following genes were monitored with real-time PCR: interleukin-6 (IL-6), dual-specificity protein kinase 5 (MEK5), Fas-associated death domain protein (FADD), epidermal growth factor (EGF), signal transducer and activator of transcription 3 (STAT3), Janus kinase (JAK), B-cell lymphoma 2 (Bcl2) and B-cell lymphoma-extra-large (Bcl-XL). The CCl4 groups showed significant increases in biochemical markers of hepatotoxicity and up-regulation of expression levels of IL-6, Bcl-XL, MEK5, FADD, EGF, STAT3 and JAK compared with the control group. However, CCl4 administration resulted in significant down-regulation of Bcl2 expression compared with the control group. Interestingly, rutin supplementation completely reversed the biochemical markers of hepatotoxicity and the gene expression alterations induced by CCl4. CONCLUSION: CCl4 administration causes alteration in expression of IL-6/STAT3 pathway genes, resulting in hepatotoxicity. Rutin protects against CCl4-induced hepatotoxicity by reversing these expression changes.

Genes expression profile analysis of colorectal cancer cells derived from colo205 / 实用医学杂志

Objective To obtain differential expression genes from colorectal cancer cells derived from colo205 for further research. Methods RNA from colo205 cells,CD133+cells and CD133-cells were sequenced and analyzed by bioinformatics software. Results One hundred and twenty four differential expression genes were obtained, which involves 32 metabolic pathways. Conclusions Large quantities of differential genes can be found among different groups of cells derived from colo205 cells , which can provide epigenetic evidence for colorectal cancer research.

Theory of combinant expression vector of survivin antisense RNA and HSPT0 for the therapy of bladder cancer / 国际外科学杂志

Carcinoma of urinary bladder is one of the most common tumor.As life rhythm speeding up and lifestyle changing,bladder cancer incident increases year after year.Previous major treatment methods for the disease are open surgery and TURBT,but these therapies can not overcome the characteristics of its recurrence.Since the 21st century along with the rapid development of molecular biology technology,the discovery of Survivin gene,new knowledge about HSP molecules in tumor immunology and the progress of the technique called RNA interference,open up a whole new field for early diagnosis and treatment of bladder carcinoma.Discussing the role of Survivin gene in the development of tumor,survivin antisense RNA' s efficacy and the role of HSP70 in the cancer immunity,the review aims at exploring the possibility of the double gene expression vector constructed by Survivin antisense RNA gene and HSP70 gene for bladder carcinoma therapy.

Experimental research on treating hepatic carcinoma by tram-arterial delivery of p53 gene mediated by lipsome combined transferring / 中华放射学杂志

Objective To investigate the trans-arterial delivery of p53 gene transfection efficiency and therapy effect on hepatic carcinoma in combination with transferrin mediated by liposome. Methods Twenty-five VX2 experimental rabbits were randomly divided into five groups, and the different doses of transferrin combined with p53-LipofectAMINE complex were delivered into the hepatic arteries of the VX2 hepatic carcinoma models. The tissue protein of the carcinoma was extracted after 48 h and the transfection efficiency and expression rate of p53 gene were analyzed by western blot and immune histochemical techniques, to inspect the expression proportion of p53 with different doses transferring. Another ten VX2 were divided into two groups, recombinant plasmid p53-LipofectAMINE complex and transferrin-p53-LipofectAMINE complex were delivered into the hepatic arteries in two groups respectively. The liver function, size of the tumor and survival time of the animals was compared between the two groups, and results were analyzed statistically. Results Semiquantitative analysis by Western Blot showed that the transfection and expression efficiency of p53 gene combined with transferrin were higher than those without it. By immune histochemieal techniques, the p53 gene's positive rate of highly expression with various doses of transferrin were found to be different, and there was remarkable difference between the groups with and without transferring. They were 58. 33%, 69. 44%, 80. 00%, 83.33%, 81.67% respectively, there was remarkable difference between the groups with and without transferring ( Totality: x2 = 42. 37, P < 0. 01 ). The p53 gene's positive rate of expression increased gradually as the doses of transferrin increasing from 0 up to 200 μg, but the differences of positive rate had no statistical significance as the doses of transferrin increasing from 200 up to 400 μg ( x2 section : 3 groups as former x2 = 4. 82, P < 0. 05,3 groups as latter x2 =0. 67 ,P <0. 05). There was no statistical difference in the liver function at points of time between VX2 rabbits with and without transferring. But the tumors' sizes had significant difference at various points of time. Conclusion Liposome-mediated p53 gene on treating hepatic carcinoma by trans-arterial gene delivery combined with transferrin is safe, and it can markedly enhance transfection efficiency and improve the therapy effect of p53 gene.

Correlation of expression DNA double-strand break repair protein with radiosensitivity of tumor cells / 肿瘤

Objective: To explore the correlation between the expressions of DSB (DNA double-strand break) repair protein (including Ku80, DNA-PKcs, and ATM) and radiosensitivity parameters of human tumor cell lines, and to reveal the value of the three proteins for the prognosis of the radiosensitivity of tumor cells. Methods: Eight tumor cell lines were selected including four human cervical carcinoma cell lines (HeLa, SiHa, C33A, and Caski), three human breast carcinoma cell lines (MCF-7, MDA-MB-231, MDA-MB453), and one human lung carcinoma cell line (A549). The expressions of Ku80, DNA-PKcs and ATM protein were measured by Western blotting. The apoptotic ratio of tumor cells was analyzed by flow cytometry after 48 h X-ray irradiation at 10 Gy of 6 MV. SF2 value (survival fraction at 2 Gy) and α and β values were obtained by clone formation assay. The correlation of protein expression with SF2, α/β value or apoptotic ratio was analyzed by Pearson linear correlation analysis. Results: The expression of same protein in different cell lines and the expression of the three proteins in the same cell line had significant difference. There was a positive correlation between the expression of DNA-PKcs and SF2 (r=0.723, P=0.043 0.05). The expression of the three proteins had no correlation with either apoptotic ratio or α/ β value (P>0.05). Conclusions: Tumor cells with higher expression of DNA-PKcs protein will have higher radioresistance. The expression level of DNA-PKcs protein in tumor cells may be an indicator for predicting the radiosensitivity of tumor cells.

Clinical study on the effect of normothermic liver ischemic preconditioning on the expression of apoptosis regulating genes / 中国普通外科杂志

Objective To explore the expression of apoptosis regulating genes C jun and bcl X L after normothermic liver ischemic preconditioning and its clinical significance. Methods 16 cases of liver cancer were randomly divided into ischemic reperfusion(IR) group and ischemic preconditioning (IP) group (8 cases in each). The samples of venous blood were drawn before IR or IP procedure and 30 minute after reperfusion for testing ALT, AST and LDH. Meanwhile, samples of liver tissue were taken for study of hepatocellular apoptosis, expressions of C-jun mRNA、 Bcl-X L mRNA and PCNA and morphologic changes. Results The levels of ALT、 AST、 LDH and AI in IR group were significantly higher than those in IP group (P

Semi-quantitative analysis of MCT1 and MCT2 genes mRNA expression in human hepatocellular carcinoma / 中国普通外科杂志

Objective To study the mRNA expression of MCT1 and MCT2 genes in human hepatocellular carcinoma (HCC) and paracarcinoma liver tissue (PCLT). Methods The semi-quantitative analysis of MCT1 and MCT2 genes mRNA expression in human HCC and PCLT was conducted by RT-PCR method and electrophoresis band opacity density (OD) comparison analysis method in 25 patients with HCC. Results The mRNA expression of MCT1 was significantly higher than MCT2 in HCC and PCLT, in HCC the mRNA expression of MCT1 and MCT2 genes were significant higher than that in PCLT. Conclusions The high expression of mRNA of MCT1 and MCT2 genes in HCC indicates that these genes may take a significant role on lactate and other monocarboxylate transmembrane transportation and on pH regulation in tumor cells.

Effect of ?-interferon on the expresson of Fas, Bcl-2 on Hep-G2 hepatocellular carcinoma cells / 中国普通外科杂志

Objective To investigate the influence of ?-interferon (?-IFN) on liver cancer cell line (Hep-G2). Methods Observing the expression of Fas and Bcl-2 by ?-IFN-pretreated Hep-G2 cells via immunohistochemical stain; subsequently treating these cells with adrimysin, and observing the cell death rate and apoptosis of these cell by MTT and electroscopy. Results (1) ?-IFN up-regulating the expression of Fas protein and down-regulating Bcl-2 protein (P

Study on differential genes expression in HBV-related heptocellular carcinoma / 中国普通外科杂志

Objective To investigate the expression of oncogenes and tumor suppressor genes in hepatitis B virus (HBV) related hepatocellular carcinoma (HCC). Methods mRNA was extracted from cancerous and paracancerous tissues of 22 patients with HBV related HCC and synthesized into cDNA. The cDNA labeled with 33p dATP was hybridized for cDNA microarray each consisting of 3170 genes or expressed sequence tags (EST). The differential expression genes were searched in gene data base and verified using RT PCR. Results The differential expression of 1369 genes or EST was identified including 121 genes or EST altered 2 times or more in cancerous tissues compared with paracancerous tissues. Compared with paracancerous tissues, 88 showed overexpression and 33 genes were down regulated. The positive expression of transmembrane 4 superfamily member 1 (TM4SF1) in cancerous tissues was 86.4 % and could not be detected in paracancerous tissues (P

Expressions and clinical significance of multidrug resistance associated protein gene (MRP) and lung resistance protein gene (LRP) in hepatocellular carcinoma (HCC) / 中国普通外科杂志

Objective To study the expressions and significance of MRP and LRP in HCC. Methods The expressions of two genes were examined in three tissues (54 cases of HCC, 24 para cancer and 12 posthepatitis cirrhosis tissues) by SP immunohistochemical and PCR techniques. Results MRP and LRP were expressed in three tissues, with significantly higher rates in HCC than others (P

Relationship of expression between STAT1,STAT2 and hMLH1,hMSH2 in hepatocellar carcinoma / 中国普通外科杂志

Objective To study the significance and expression relationship among STAT1,STAT2 and hMLH1 ,hMSH2 proteins in hepatocellur carcinoma(HCC). Methods SABC immunohistochemistry method was used to detect the expression of STAT1,STAT2,hMLH1 and hMSH2 proteins in cancer tissues and paracancer tissue from 37 patients of HCC. Results The positive rates and expressive levels of STAT1,STAT2,and hMLH1, hMSH2 in HCC was significantly lower than those in paracancer liver tissues(P

Significance of MRP1/CD9 protein expression in human hepatocellular carcinoma / 中国普通外科杂志

Objective To investigate the expression of MRP1/CD9 protein in human hepatocellular carcinoma (HCC),and its relationship to carcinoma invasion and metastasis. Methods The specimens of tissue microarray from 152 primary hepatocellular carcinomas with paracancerous liver tissue, 22 tumor emboli , 4 intrahepatic satellite metastases, 17 extrahepatic metastases ,and 5 normal livers, respectively, were constructed and used for detection of MRP1/CD9 expression by immunohistochemistry. Results Immunohistochemical analysis of tissue microarrays demonstrated MRP1/CD9 protein expression in 27.0%(41/152)of the primary HCCs. The expression of MRP1/CD9 protein was higher in HCCs without cancer thrombi than in those with cancer thrombi (40.48%vs21.82%,P10cm, P20?g/L, P=0.029). Conclusions Loss of MRP1/CD9 protein expression may be associated with invasion and metastases of hepatocellular carcinoma.

A study of hepatocyte apoptosis and its gene expression in patients with liver cirrhosis and portal hypertension / 中国普通外科杂志

Objective To study the relationship of hepatocyte apoptosis and gene expression of liver cirrhosis and primary hepatic carcinoma. Methods Specimens of liver tissue from patients with liver cirrhosis and portal hypertension and normal subjects were examined by transmission electron microscope to detect apoptotic cells and primary cancer gene expression. Results The number of apoptotic cells and the apoptotic index of cirrhotic liver tissue was higher than that of normal subjects.Immunostaining of bcl 2,c myc,c fos was negative in normal liver tissue ,but was over expressed in cirrhosis. Conclusions Hepatocyte apoptosis plays a certain role in the development of hepatic cirrhosis. The oncogenes bcl 2,c myc,c fos take part in the regulation of hepatocyte apoptosis .

Significancy of expression of tumor suppressor gene PTEN and p16 protein in cholangiocarcinoma / 中国普通外科杂志

Objective To investigate the relationship between the expression of tumor suppressor gene PTEN and p16 protein and the biologcal behaviors of cholangiocarcinomas.Methods The expression of PTEN and p16 protein in 43 of cholangiocarcinoma tissues and 10 chronic cholangitis tissues were investigated by immunohisto-chemical technique.The relationship between expression of PTEN and p16 protein and the clinicopathological parameters of cholangiocarcinoma was analyzed. Results The positive expression rate of PTEN and p16 protein in cholangiocarcinoma was 39.5% and 44.2%,respectively.The expression of PTEN and p16 protein were positively relatad with the TNM staging,differentiation degree and metastasis of cholangiocarcinoma (P