Objective To analyze the influence of HIV drug resistance genotypes on the outcomes of antiretroviral treatment in AIDS patients.Methods A total of 499 AIDS patients were included as the research subjects.Drug resistance genotypes were detected and compared with the database.Simultaneously,viral load and the absolute counts of CD4+lymphocyte were measured.The genotypes of drug resistance and effects of clinical treatment were analyzed.Results Among the 499 cases studied,409 samples were successfully amplified and sequenced,and 181 cases occurred drug resistance.The patients with drug resistance were significantly older than those without drug resistance,and their CD4+absolute cell counts were significantly lower.Nucleoside reverse transcriptase inhibitors(NR-TI)and non-nucleoside reverse transcriptase inhibitors(NNRTIs)were more likely to develop high-level drug resistance compared to protease inhibitors(PI).Additionally,drug-resistant patients had higher viral loads.Conclusion The overall incidence of drug resist-ance in AIDS patients in Nanjing area is relatively low,but the proportion of multidrug-resistant and highly resistant patients among those with drug resistance is relatively high.During diagnosis and treatment,clinical indicators should be monitored,and antiretroviral treatment plans should be adjusted in a timely manner with preference given to the antiretroviral drugs with high resistance barriers.

Objective To observe the tumorigenicity of High Five insect cell line in Balb/c nude mice,and make sure the safety of the cells when used in vaccine production.Methods Balb/c nude mice were randomly divided into 5 groups:the basic cell bank of High Five group,the highest limited passages of High Five group,HEp-2 cell group as positive control,CEF cell group as negative control,and blank control.Except of the blank control,cell suspension was injected subcutaneously into the nude mice in the different groups,respectively.At 3 and 12 weeks after injection,anatomical observation and histopathologic examination were performed to detect the tumor formation.Results At 3 and 12 weeks after injection,the tumorigenicity study results showed that no tumor developed at the transplantation site in the blank control group,negative group,and High Five groups.Histopathological examinations also showed no abnormality in these groups.Otherwise,squamous cell carcinoma was developed in the positive group at 3 weeks after injection.Conclusions High Five cells of basic cell bank and highest limited passages are not tumorigenic,and can be used in vaccine production safely.