Effect of Capsaicin on Proliferation and HMGB1 and IL-6 Expressions in Hepatoma SMMC-7721 Cells / 中国实验方剂学杂志

Objective: To investigate the effect of capsaicin on proliferation in human hepatoma SMMC-7721 cells and its possible molecular mechanism. Method: Capsaicin (50,100,150,200,250,300 μmol·L-1) groups and blank group were set up. The cell viability was detected by cell counting kit-8 (CCK-8) assay after SMMC-7721 cells were treated with capsaicin (50,100,150,200,250,300 μmol·L-1) for 24, 48, 72 h. The morphological changes were observed under an inverted microscope after SMMC-7721 cells were treated with capsaicin (150,200,250 μmol·L-1) for 24 h. The mRNA expression levels of high mobility group box 1 (HMGB1) and interleukin-6(IL-6) were measured by Real-time PCR after SMMC-7721 cells were treated with capsaicin (150,200,250 μmol·L-1) for 24 h. The levels of HMGB1 and IL-6 in cell culture supernatant were detected by enzyme-linked immunosorbent assay(ELISA) after SMMC-7721 cells were treated with capsaicin (150,200,250 μmol·L-1) for 24 h. Result: Compared with the blank group, there was no significant difference between 50 and 100 μmol·L-1 capsaicin groups treated for 24, 48, 72 h; after treated with the other concentrations of capsaicin (150, 200, 250, 300 μmo·L-1) at different time points, the proliferation inhibition rate was statistically significant (P-1) groups showed different degrees of morphological changes in SMMC-7721 cells, which became round and wrinkled, with a poor attachment and more exfoliation; compared with the blank group, the mRNA expressions of HMGB1 and IL-6 in SMMC-7721 cells of capsaicin (150, 200, 250 μmol·L-1) groups were significantly down-regulated (PPConclusion: Capsaicin inhibits cell proliferation of SMMC-7721 cells, and the possible mechanism may be related to the down-regulation of HMGB1 and IL-6 at the mRNA and protein levels.

Epidemiological analysis of primary liver cancer in the early 21st century in Guangxi province of China / 癌症

<p><b>BACKGROUND AND OBJECTIVE</b>In Guangxi province, from 1970s to 1990s, the mortality of primary liver cancer (PLC) ranked the first among a variety of malignant tumors. Investigating the epidemiological characteristics of PLC is very important for developing reasonable and effective treatment strategy, allocating health resources rationally, and evaluating the quality of PLC prevention and control. This study was to analyze the mortality and epidemiological characteristics of PLC in Guangxi province between 2004 and 2005.</p><p><b>METHODS</b>Multi stage stratified cluster random sampling method was used to select 9 counties (cities or urban areas) as sample points. The residents' death causes between 2004 and 2005 were analyzed, and the epidemiological characteristics of PLC were investigated.</p><p><b>RESULTS</b>In the period of 2004-2005, the crude mortality of PLC was 34.39/100,000 in Guangxi province population (55.30/100,000 in men and 13.21/100,000 in women). The national population standardized mortality in 1964 was 22.17/100,000. The man to woman ratio of mortality was 4.19:1. PLC ranked as the first death cause among a variety of malignant tumors, and PLC related death accounted for 30.70% of all tumor related death cases. Age specific mortality of PLC was increased with age, rising significantly from 30 year old (from 25 year old in men and from 40 year old in women), and reached a peak at 75 year old.</p><p><b>CONCLUSIONS</b>The mortality of PLC shows a decreasing trend in Guangxi province in the early 21st century, and the starting age of PLC death peak postpones about 10 years than that in 1990s. It shows that the comprehensive prevention and control measures of PLC implemented in Guangxi province are fruitful. However, the PLC mortality in Guangxi province is still significantly higher than the national average level, and it still ranks as the first death cause in a variety of malignant tumors in Guangxi province. PLC mainly occurs in middle aged and elderly people. The prevention and treatment research of PLC still has a long way to go.</p>

Study on the relationship between familial clustering of hepatocellular carcinoma and polymorphism of cytochrome P450 2E1 gene in Zhuang populationl Guangxi / 中华流行病学杂志

Objective To study the relationship between familial clustering of hepatocellular carcinoma(HCC)and the polymorphism of cytochrome P450 2E1 gene(CYP2E1)as well as of other relevant risk factors to the cancer.Methods Peripheral blood samples were collected from 91 members of 10 HCC clustering families and 102 of 10 control families,among Zhuang population,in Guangxi.The area had been with high incidence rate of HCC.Genotypes and allele frequencies of CYP2E1 Rsa I site were determined by polymerase chain reaction.combined with restriction fragment length polymorphism method (PCR-RFLP).Serum HBsAg was tested by means of ELISA.Data on relevant risk factors of the cancer were collected as well.through a unique questionnaire.Results Frequencies of c1/c1 and c1/c2 genetypes of CYP2E1 Rsa I site were 63.7%and 36.3%.respectively,in the members of families with cancer clustering phenomena.In the members of the control families.these two rates were 48.0%and 52.0%,respectively (OR=1.901,95%CI:1.067-3.387).Difference of genotypes frequencies of CYP2E1 Rsa I site between the members in these two groups was statistically significant(X2=4.797,P=0.029).According to the results from non-condition logistic regression analysis.the major risk factors on familial clustering of HCC could be listed as:intake of corns.HBsAg carrying status and CYP2E1 c1/c1 genotype.Conclusion The relationship seemed to exist between familial clustering of HCC and the frequencies of polymorphism of cytochrome P450 2E1 gene(CYP2E1).The frequencies of CYP2E1 Rsa I site were neither the only nor the major factor,causing the familial clustering phenomenon of cancel More possible,it Was the affect of syntheses with the involvement of multiple factors.

A cross-sectional study on liver diseases in the rural residents in southern Guangxi, China / 中华预防医学杂志

<p><b>OBJECTIVE</b>To study the epidemiological characteristics of liver diseases in a rural population in Southern Guangxi, China.</p><p><b>METHODS</b>The enzyme immunoassays was used to detect of HBsAg and AFP. AFP positive serum samples were further examined for concentration of AFP by using a radio immunoassays. Liver morphological changes were measured with ultrasonography of type B.</p><p><b>RESULTS</b>The positive rates of HBsAg in the studied population was 17.8% (2800/15,701). The prevalence rates of viral hepatitis B, cirrhosis, primary liver cancer, clonorchiasis, fatty liver disease, alcoholic liver disease were 1.1% (173/15,701), 0.4% (63/15,701), 299.3 per 100,000 (47/15,701), 6.6% (1036/15,701), 4.8% (754/15,701) and 0.3% (47/15,701), respectively. The positive rates of HBsAg and the prevalence rates of viral hepatitis B, cirrhosis, primary liver cancer, clonorchiasis, fatty liver disease in male were significantly higher as compared with those in female (5.98 < or = chi(2) < or = 394.78, P < 0.01). No difference was observed in the prevalence rates of liver cavernous hemangioma and hepatic cysts between male and female. The prevalence rates of intrahepatic bile duct stones was significantly higher in female than in male (chi(2) = 30.80, P < 0.01). The positive rates of HBsAg and the prevalence rates of viral hepatitis B and clonorchiasis were decreased with age. But the prevalence rates of cirrhosis, primary liver cancer, fatty liver disease, alcoholic liver disease, liver cavernous hemangioma, hepatic cysts and intrahepatic bile duct stones were increased with age.</p><p><b>CONCLUSION</b>The rural areas in the southern Guangxi are high prevalence regions of liver illness, and the male resident are even at high risk.</p>

Cloning, expression and purification of the C-terminal section of murine heat shock protein gp96 / 生物工程学报

Heat shock protein gp96 is a glycoprotein which was found several years ago. Besides its function as a molecular chaperone, it is also reported to play important roles both in innate immunity and adaptive immunity. Gp96 can stimulate the maturation of antigen presenting cells (especially dendritic cells) and the secretion of cytokines. Gp96 and its associated peptides could stimulate peptide specific cytotoxic T lymphocyte reaction (CTL), which was very promising in the designing of anti-virus and anti-tumor vaccines. However the expression level of whole length gp96 was relatively low in E. coli and the purity of gp96 are not very suitable for further study. We successfully cloned the carboxy terminal fragment (560aa-751aa) of murine gp96 into the pGEX-6p-1 vector and expressed in BL21 strain. This fragment contains the peptide binding domain and the dimerization domain. After purification, the recombinant fusion protein was cleaved with the PreScission Protease and analyzed by Gelfiltration. The results show that this fragment may be related to the dimerization of gp96 and make an foundation for further investigations of the protein.