control relatives.A ratio of s/q approached1/q with Penrose' s method.Heritability of SLE was78.8%?4.45%in the first-degree relatives,58.8%?10.9%in the second-degree relatives,and39.2%?32.0%in the third-degree relatives.The weighted mean heritability was75.2%?4.12%.Conclusions SLE has characteristics of polygenic disease.Genetic factor might play an important role in the liability of SLE.

Objective:To investigate the effects of TGF-β1 on T lymphocytes of BALB/c mice infected with Echinococcus granulosus( E.granulosus ) in vitro.Methods: The inhibitor group:the spleen cells of BALB/c mouse were co-cultured with E.granulosus and SB525334.The control group:the spleen cells of BALB/c mouse were co-cultured with E.granulosus and PBS.The blank group:the spleen cells of BALB/c mouse were co-cultured with RPMI-1640 medium and SB525334.The lymphocytes were collected at 48 h post-infection.The T lymphocyte subsets, the number of CD4+CD25+T cells, the number of NK cells, and the expression of NKG2D receptor were detected by flow cytometry.The NK cell activity was determined with the lactate dehydrogenase leakage assay(LDH).Results:The inhibition the TGF-β1 receptors resulted in the increase of in the number of CD4+T cells,the decrease in the number of CD8+T cells,the increase of in the ratio CD4+/CD8+T cells,the decrease of in the number of CD4+CD25+T cells,the increase in the expression of the NKG2D receptors,the increase in the lysis rate of Yac-1 cells by NK cells,and a positive cor-relation between the expression of activity receptor NKG2D and killing activity of NK, which were mediated by E.granulosus.Conclusion: The inhibition of TGF-β1 receptors can enhance the immune response of T lymphocytes against E.granulosus infection in vitro.

Objective To analyze the epidemiological characteristics of the novel coronavirus pneumonia epidemic in Hebei Province, and to provide a scientific basis for the prevention and control of the novel coronavirus pneumonia epidemic. Methods Descriptive epidemiological methods were used to analyze the epidemiological characteristics of all COVID-19 cases reported in Hebei Province from January 22, 2020 to September 22, 2020. Results As of September 22, 2020, a total of 365 confirmed cases had been reported in Hubei Province, including 339 local confirmed cases and 26 imported cases, of which 18 were critical cases, 34 severe cases, and 6 deaths. Among the confirmed cases, 198 were males and 167 were females, with a male to female ratio of 1.19:1. The epidemic situation in Hebei Province can be divided into three stages: The first stage (January 22 to April 6) was dominated by imported cases from Hubei Province, with 318 reported cases, accounting for 87.12% of the total cases, and the mortality rate was 1.89%; The second stage (June 14 - July 25) was the spread caused by cases in Beijing Xinfadi market, with 21 cases reported, accounting for 5.75% of the total cases, and the mortality rate was 0%; The third stage (July 26 - September 22) was mainly imported cases from abroad, with 26 cases reported, accounting for 7.12% of the total cases, and the mortality rate was 0%. Conclusion The COVID-19 epidemic situation in Hebei Province has been under control. In view of the continuous spread of the epidemic situation in foreign countries, it is extremely important to strictly prevent the import of overseas epidemics and prevent the outbreak from rebounding.