[The third-generation sequencing combined with targeted capture technology for high-resolution HLA typing and MHC region haplotype identification].

The high-resolution and accurate typing of human leukocyte antigen (HLA) is of great significance for the study of tissue matching in organ transplantation and the correlation between HLA and disease. In this study, the peripheral blood of 12 patients with primary hepatocellular carcinoma was used to compare the advantages and disadvantages of the next- and third-generation sequencing technology for high-resolution HLA typing. In addition, probe capture technology was used to capture the MHC region of YH and HeLa standard cell lines, and a primary hepatocellular carcinoma patient. The captured products were sequenced using PacBio platform to assess the potential of ultra-long reads sequencing technology for analysis of the entire MHC region. Our results showed that: (1) the next- and third-generation sequencing technology can both achieve 6-8 digit high resolution in HLA typing. However, the coverage of the third-generation is significantly better than the next-generation sequencing technology. (2) The ultra-long reads of the third generation sequencing can directly span the entire amplicon region, which has obvious advantages for haplotype phasing, with 92.79% of the HLA genes having accurate phasing results, which is much higher than the 75.65% from the next-generation data. (3) The long-reads from the third generating sequencing can not only be used to assemble the MHC region but also the ability to phase the entire MHC region of 3.6 Mb, thereby helping to clarify the localization information of the mutation sites, alleles and non-coding regions on each MHC haplotype, and providing a theoretical basis for the study of immune and other related diseases.

[Survey on mental disorders among registered residents and non-registered residents in Shenzhen].

OBJECTIVE: To study the prevalence and distribution of mental disorders among registered and non-registered residents in Shenzhen. METHODS: An epidemiological survey on mental disorders were carried out in Shenzhen by stratified multi-stage randomized sampling method; 7134 respondents were assessed through face-to-face interview, using the WHO standardized version on World Mental Health (WMH) Survey Initiative of the Composite International Diagnostic Interview (CIDI3.1). RESULTS: (1) The weighting prevalence of mental disorders was 21.87%. The prevalence of non-registered residents was significantly higher than that of the registered residents (22.34% vs. 19.99%; OR=1.15, 95%CI: 1.03-1.29; P<0.05) and the prevalence of females was significantly higher than that of males (22.68% vs. 19.67%; OR= 1.20, 95%CI: 1.07-1.34; P<0.05). The weighting prevalence of mood disorders, anxiety disorders and psychoses were 9.62%, 14.45% and 1.40%, respectively. (2) The weighting twelve-month incidence of mental disorders was 13.42%. The incidence of non-registered residents was significantly higher than that of the registered residents (13.80% vs. 11.90%; OR=1.19, 95%CI: 1.03-1.36; P<0.05). (3)The co-morbidity rate between mental disorders was 35.76%. (4)The prevalence and severity of mental disorders were associated with sex, household situation of registration, marital status, education, economic condition and occupation status. CONCLUSION: Mental disorders have become common diseases and serious public health problem in Shenzhen, with non-registered residents and females deserve more attention.