Adolescent ; Biopsy, Fine-Needle ; Chromosomes, Human, Pair 18 ; Female ; Humans ; In Situ Hybridization, Fluorescence ; Oncogene Proteins, Fusion ; genetics ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Sarcoma, Synovial ; genetics ; metabolism ; pathology ; Soft Tissue Neoplasms ; genetics ; metabolism ; pathology ; Translocation, Genetic ; Vimentin ; metabolism

Objective To investigate the influence of RNAi gene silence on the chemosensitivity of human digestive system neo-plasms .Methods Esophageal cancer EC109 cells and gastric adenocarcinoma SGC-7901 cells were selected and divided into the transfection group and the blank control group for culturing .Two cell lines in the transfection group were transferred by siRNA and silenced the expression of Survivin ,giving cisplatin 5 mg/L to co-culture for 72 h .The blank control group was given the conven-tional culture and the same dose of cisplatin for co-culture for 72 h .The in vitro proliferation rate of cells in the two groups were measured by MTT and their sensitivities to the chemotherapy drug cisplatin were compared .Results After siRNA silencing the ex-pression of Survivin in SGC-7901 and EC109 cell lines ,the sensitivity of cells to cisplatin drugs was increased .MTT results sugges-ted that the proliferation activity of cells was significantly lower than that in the non-silence cell lines ,the difference showing statis-tical significance(P<0 .05) .Conclusion Adopting RNAi gene silencing technique can interfere the expression of Survivin gene ,in-hibit the proliferation of tumor cell ,and at the same time significantly improve the sensitivity of tumors to chemotherapy .

Animals ; Antigens, CD34 ; metabolism ; Cell Culture Techniques ; methods ; Cells, Cultured ; Endothelial Cells ; cytology ; metabolism ; Female ; Kidney Glomerulus ; cytology ; metabolism ; Male ; Rats ; Rats, Sprague-Dawley ; Vimentin ; metabolism

Connexin-43 (Cx43) expression in prostate cancer (PCa) cells and the potency of gap junctional intercellular communication (GJIC) in the cells were investigated, with an attempt to elucidate the reason why the so-called "bystander effect" mediated by thymidine kinase (TK) suicide gene therapy on PCa cells is not of significance and to explore the role of GJIC in PCa carcinogenesis. mRNA and protein expression of Cx43 in a PCa cell line PC-3m was detected by reverse-transcription polymerase chain reaction (RT-PCR) and strapt-avidin-biotin-enzyme complex (SABC) immunohistochemical staining, and inherent GJIC of PC-3m cells was assayed by scrape-loading and dye transfer (SLDT) assay. The expression of Cx43 in human normal and malignant prostate tissues was determined by SABC immunohistochemistry as well. It was found that Cx43 mRNA and protein expression in PC-3m cells was slightly reduced as compared with positive controls and the location of Cx43 protein was aberrant in cytoplasm rather than on membrane. Assessment of paraffin sections demonstrated that the expression of Cx43 protein in PCa cells was abnormally located and markedly diminished as compared with normal prostatic epithelial ones, displaying a negative correlation to the pathological grade (chi2=4.025, P<0.05). Additionally, capacity of inherent GJIC in PC-3m cells was disrupted, which was semi-quantified as (+) or (-). It was indicated that both down-regulated expression of Cx43 mRNA and aberrant location of Cx43 protein participated in the mechanisms leading to deficient GJIC in PC-3m cells. Lack of efficient GJIC is a molecular event, which may contribute not only to limited extent of "bystander effect", but also to initiation and progression of prostatic neoplasm.

Forest musk deer (Moschus berezovskii), a rare wild medicinal animal, is listed under the category of the state key protected wildlife list of China. Musk, secreted by the musk glands, is with high economic and medicinal value and used as precious traditional medicine in China. In order to meet the needs of musk in Chinese traditional medicine, forest musk deer farming was conducted in 1950s, but the research progress on musk secretion mechanism was slow. Therefore, by reviewing the histological and anatomical structure of forest musk deer musk gland, the relationship between sex hormones and the musk secretion process, and the molecular mechanism of the musk secretion, the existing problems in investigating the musk secretion mechanism were analyzed and the development trends in this field were also discussed, in order to provide a reference for further studies on the musk secretion mechanism and improve musk production of forest musk deer.
Animals ; Deer ; metabolism ; Exocrine Glands ; anatomy & histology ; chemistry ; secretion ; Fatty Acids, Monounsaturated ; chemistry ; metabolism ; Male

Abstract: Objective　To analyze the epidemic characteristics of soil-transmitted helminth (STH) by the spatial epidemiological method in Jiangxi Province. Methods　Surveillance data of STH in Jiangxi Province from 2016 to 2019 were collected for descriptive epidemiological analysis. The space-time permutation distribution of STH infection areas was analyzed with spatial autocorrelation, hotspot analysis methods and retrospective space-time permutation scan statistics. Results　The infection rates of STH were 1.32% (947/71 766), 1.14% (803/70 547), 0.87% (604/69 507) and 0.90% (628/69 620), respectively, and the differences were statistically significant in different years (P<0.01). The rates of hookworm infection were 0.65% (466/71 766), 0.64% (450/70 547), 0.48% (336/69 507) and 0.52% (362/69 620), respectively, and the differences were statistically significant (P<0.01). The infection rates of Ascaris lumbricoides were 0.55% (393/71 766), 0.41% (287/70 547), 0.32% (221/69 507) and 0.32% (225/69 620), respectively, and the differences were statistically significant in different years (P<0.01). The infection rates of Trichuris trichiura were 0.17% (125/71 766), 0.10% (74/70 547), 0.08% (57/69 507) and 0.07% (49/69 620), respectively, and the differences were statistically significant among different years (P<0.01). The results of global spatial autocorrelation analysis showed that there was a spatial autocorrelation index Moran's I value of hookworm infection rate in 2016, Trichuris trichiura infection rate in 2016, 2018 and 2019, with statistical significance (P<0.05). The results of hotspot analysis, SaTScan and FleXScan spatial and temporal scanning analysis showed that there were high-value aggregation regions for each species in each year. Conclusion　The infection rates of STH, hookworm, Ascaris lumbricoides and Trichuris trichiura showed a decreasing trend and space-time clustering from 2016 to 2019. It should be taken into account in the formulation of control strategies.

AIM:To explore a novel method to isolate human nucleus pulposus mesenchymal stem cells (hNP-MSCs) in vitro and to identify their biological characteristics.METHODS:The explant culture method was employed to isolate hNP-MSCs from nucleus pulposus tissue obtained by percutaneous endoscopic lumbar discectomy (PELD).The isolated cells were passaged for purification and cultured in vitro followed by morphological observation.The cell proliferation ability was detected by CCK-8 assay.Growth curves of the cells were drawn and surface antigens were detected by flow cytometry.The cells at the 3rd~6th passages were induced for adipogenic, osteogenic and chondrogenic differentiation, and examined by oil red O staining, alizarin red staining and Alcian blue staining.RESULTS:The cells with self-renewal were obtained from nucleus pulposus tissue obtained by PELD.The results of flow cytometry analysis revealed that the cells were positive for CD29, CD44, CD90, CD73 and CD105, but negative for CD34 and CD45.The proliferative capacity was consistent with the growth characteristics of MSCs and multilineage differentiation potential was identified.CONCLUSION:A novel method to efficiently isolate and culture hNP-MSCs,PELD combined with explant culture method,was established, which would promote the study of regenerative medicine based on hNP-MSCs.

Objective To investigate the fear and attitude of the common people to some threatening diseases .Methods Accord-ing to the age and sex structure of the whole nation ,500 common people were randomly enrolled in the public places of Chongqing main urban area .Firstly ,the respondents were asked to name three diseases they feared most .Then their fear degrees to eight im-portant diseases were performed the questionnaire survey .Results The top ten diseases that common people fear most by their own words were cancer ,AIDS ,heart disease ,hypertension ,stroke ,leukemia ,chronic liver diseases ,diabetes mellitus ,dementia and de-pression successively .Meanwhile ,their fear to the eight important diseases ,which was determined by the ratio of people who did fear to all ,were cancer(94 .2% ) ,traffic accidents(89 .2% ) ,heart disease(85 .0% ) ,AIDS(79 .4% ) ,tuberculosis(76 .8% ) ,hepatitis B(76 .6% ) ,Alzheimer′s disease(73 .4% ) and depression(69 .0% ) .Further analysis showed that such fear was significantly influ-enced by age ,sex and education level .Conclusion The knowledge and perception of common people about certain diseases is one-si-ded ,and their health awareness should be improved .

Objective To investigate the characters of the COL3A1 gene polymorphisms in Chinese population of Hunan region and the relationship between the COL3A1 gene polymorphisms and ischemie stroke.Methods Objects examined were composed of 70 healthy controls,110 patients with acute cerebral infarction.The frequencies of the genotypes were detected by using PCR-SSLP techniques and correlated PCR segements were analyzed by directly sequence to detect the COL3A1 gene polymorphisms.Result There were significant differences in the distribution of VNTR with COL3A1 genotype polymorphism between the patients of acute cerebral infarction and healthy controls,the former being 0.93,the latter 0.43,with a significant difference(P

Objective To study the correlation between drug-resistance of paclitaxel and the expres- sion levels of anti-apoptotic protein survivin and the role of matrine reversal resistance of PTX in non-small cell lung cancer.Methods The expressions of survivin in 120 samples of human lung cancer with paclitaxel chemotherapy were detected by immunohistochemical staining.Results The positive expression rate of sur- vivin was 57.5%.In the positive expression of survivin group,chemotherapy combined matrine could improve response rate and survival time(P0.05).Conclusion The survivin expression was related to the response rate of paclitaxel in lung cancer.It might be a valuable new marker to predict the drug-resistance of paclitaxel.In this prospective research,survivin protein,which promoted the apoptosis caused by paclitaxel,may be the target of martine.It could partly reverse the drug re- sistance to paclitaxel.