Advances of structure and mechanisms of bromodomain-containing protein 4 and its related research in tumors / 生物工程学报

The bromodomain and extraterminal domain (Bet) family are the regulators of the epigenome and also the pivotal driving factors for the expression of tumor related genes that tumor cells depend on for survival and proliferation. Bromodomain-containing protein 4 (Brd4) is a member of the Bet protein family. Generally, Brd4 identifies acetylated histones and binds to the promoter or enhancer region of target genes to initiate and maintain expression of tumor related genes. Brd4 is closely related to the regulation of multiple transcription factors and chromatin modification and is involved in DNA damage repair and maintenance of telomere function, thus maintaining the survival of tumor cells. This review summarizes the structure and function of Brd4 protein and the application of its inhibitors in tumor research.

Prevalence of human papillomavirus infection in women in Tibet Autonomous Region of China / 中华妇产科杂志

Objective To determine the prevalence of cervical type-specific human papillomavirus (HPV)infection as well as risk factors associated in Tibet Autonomous Region of China.Methods A cluster sampling study was performed in Lasa,Rikaze and Naqu of Tibet.An epidemiological questionnaire was applied and 3036 cervical specimens were obtained for liquid-based cytology and HPV DNA detection.Statistical analysis included Wald Chi-square and stepwise logistic regression model.Results The overall HPV prevalence of involved 3036 women was 9.19%(279/3036),of which 7.05%(214/3036)of the women were infected by high-risk types (including 14 sorts of types) and 2.14%(65/3036)by low-risk types(including 6 sorts of types).There were no significant differences of HPV prevalence between age groups(P=0.936),race(P=0.718)and areas(P=0.746),respectively.Twenty-one types of HPV were detected,of which HPV16(1.52%) was the most common type,followed by HPV33(1.42%).HPV58(1.22%),HPV52(1.15%),and HPV31(1.05%).HPV type distribution was varied by age.Of the 279 HPV infected women.14.3%(40/279)exhibited multiple HPV infections.Independent risk factors for HPV infection were smoking(P=0.027),number of sex partners(P=0.198)and early age of first intercourse(P=0.237).Conclusion The overall prevalence of HPV infection in Tibet Autonomous Region is lower than that in China or abroad,in which the most common genotype is HPV16 and the independent risk factors for HPV infection included early age of first intercourse,smoking,and number of Bex partners.