Objective To develop a vulnerable plaque targeting ultrasound contrast agent (UCA) and to evaluate its affinity and imaging performance in vitro.Methods E-selectin receptor-targeting UCA,which conjugated with monoclonal antibody of E-selectin,was prepared with filming-rehydration method and biotin-avidin linkage.The size and distribution of UCA were measured with particle size analyzer,the connectivity condition of microbubbles with E-selectin antibody was also detected with fluorescence analysis.The cytotoxicity from microbubble and ultrasound irradiation was evaluated through cell counting kit-8 (CCK8) assay.The adhesion effect of UCA was assessed after co-incubated with activated mouse endothelial cells (bEnd.3) and compared with that of free antibody intervention group and control group.The imaging performance of UCA at different time points was observed on an ultrasound equipment with a high-frequency transducer.Two-sample t test and one-way analysis of variance were performed to analyze the data.Results E-selectin receptor-targeting UCA was successfully prepared.The cytotoxicity result with CCK8 assay demonstrated the favorable biocompatibility of UCA.The connection amount of UCA on activated bEnd.3 cells ((6.23 ± 0.45) bubbles/cell) was significantly higher than that of the free antibody intervention group ((1.57±0.34) bubbles/cell) and control group ((0.07±0.03) bubbles/cell;F=291.43,P＜0.01).The performance of in vitro ultrasonography at the same time points showed no obvious difference between targeting UCA and control UCA (all t＜0.51,all P＞0.05).Conclusions The prepared E-selectin receptor-targeting UCA has favorable targeting and imaging capabilities.It might be a potentially ultrasound molecular imaging agent for early detection and prognosis evaluation of vulnerable plaque.

Objective: To understand the AIDS knowledge of male college students who have sex experience and the influencing factors of high-risk sexual behaviors, so as to provide a basis for AIDS prevention and control on campus. Methods: A total of 5 718 male college students who have sex from 18 colleges and universities in Nanjing were investigated by stratified random cluster sampling method from April to June in 2019. Their AIDS knowledge and high-risk sexual behaviors were investigated and risk factors were analyzed. Results: Male college students had poor AIDS related knowledge and the incidence of high-risk sexual behaviors was 61.5%. Logistic regression analysis showed that the proportion of male college students with sexual orientation of bisexuality(OR=1.61), uncertainty (OR=2.41) and heterosexuality (OR=1.47) who had high-risk sexual behaviors were higher than those of homosexuals. The age of first sexual intercourse ≤14 years old(OR=2.71), 15 to 17 years old(OR=1.87), and 18 to 20 years old (OR=1.35) had a higher proportion of high-risk sexual intercourse than the age of first sexual intercourse of older than 20 years old. In the past year, the proportion of commercial sex(OR=1.80), drug use(OR=4.28), sexually transmitted disease (OR=3.34) diagnosed in the most recent year who had high-risk sexual behaviors were higher. In the pust year, the proportion of stable relationship and cohabitation(OR=0.25), those who had received AIDS prevention propaganda in the most recent year(OR=0.81), and those who knew about AIDS (OR=0.65) were less likely to engage in high-risk sexual behaviors. Conclusion The knowledge rate of HIV/AIDS was low and the incidence of high-risk sexual behavior was high among male college students. Therefore, colleges are encouraged to, actively carry out AIDS prevention and control work, improve the awareness of both HIV/AIDS knowledge and safe sex basics.

Objective:To investigate HIV-1 genotypes and drug resistance among newly diagnosed young students in Nanjing in order to provide reference for the prevention and control of AIDS in this group.Methods:This study enrolled 200 newly diagnosed young students with HIV-1 infection in Nanjing from September 2015 to July 2019. Demographic information and blood samples were collected. Through RNA extraction and PCR amplification, 191 pol fragments were successfully obtained and subjected to genotyping and drug resistance analysis. Results:CRF01_AE (41.4%) and CRF07_BC (30.9%) were the predominant genotypes, followed by unique recombinant forms (URFs) (15.7%), CRF55_01B (5.2%), CRF68_01B (3.1%), CRF67_01B (2.6%), and subtype B (1.0 %). The incidence of drug-resistant mutations was 16.8%, and the rate of transmitted drug resistance (TDR) was 4.2%. The rates of TDR in CRF01_AE, CRF07_BC, CRF55_01B, URFs and other genotypes were 2.5%, 1.7%, 10.0%, 10.0% and 7.7%, respectively ( P>0.05). Conclusions:The rapid emergence of recombinant HIV-1 strains in the young students should be taken seriously. The prevalence of TDR was close to the alert level, thus needing to be monitored continuously.

Objective: To analyze the influence of growing experience on non-heterosexual orientation among male college students. Methods: From October to November in 2015, a total of 2 535 male students from 96 classes in 14 colleges/departments were recruited from two colleges that participated in the experimental work of AIDS prevention by cluster random sampling method. A structured questionnaire was administered in this study, including general demographic information, growing experience and Kinsey scale (to evaluate sexual orientation). Out of 2 500 questionnaires distributed in this study, 2 332 effective copies were withdrew, with the effective rate at 93.3%. Chi square test was used to analyze the differences of non-heterosexual orientation among the individuals with different social demographic characteristics. Multivariate logistic regression model was used to analyze the influencing factors of non-heterosexual orientation. Results: Among the 2 332 individuals, the proportion of self-reported non-heterosexual was 6.2% (144).The proportions of male students who identify as non-heterosexual from freshman to junior year were 5.2%(63/1216),6.9%(65/941),11.7%(13/111) and 4.7%(3/64), respectively (χ²=9.06,P=0.029). Compared with the individuals of very good relationship with parents, those with bad relationship (OR=3.3, 95%CI: 1.7-6.5) and general relationship (OR=1.7, 95%CI: 1.0-2.9) with parents had a higher risk of non-heterosexual orientation, respectively. Those encountered sexual assault had a higher risk of non-heterosexual orientation than those without encountered sexual assault (OR=5.9, 95%CI: 3.2-10.9). Conclusions This study reported a high proportion of self-reported non-heterosexual among college male students in Nanjing, and highlighted the importance of targeting students with poor parental relationships and who subjected to sexually abused.

Objective To understand the current status of HIV infection in men who have sex with men (MSM) in Nanjing,explore the associated factors with HIV infection,and provide information for the intervention in MSM.Methods Data collected in the consecutive sentinel surveillances among MSM during 2011-2015 includes MSM's social-demographic information,sexual behavior histories,access to HIV prevention services and HIV testing in the past year.The infection trend was analyzed with x2 test and the factors associated with HIV infection were identified through multivariate logistic regression analysis.Results From 2011 to 2015,712,670,656,681 and 601 MSM were surveyed respectively.The HIV infection rates were 7.4％,13.7％,9.8％,12.0％ and 12.0％ respectively,with an increasing trend (P=0.044).Syphilis prevalence rates were 9.1％,11.5％,6.0％,10.6％ and 5.8％ respectively,with a decreasing trend (P=0.042).From 2011 to 2015,the percentage of MSM who failed to consistently use condoms for anal sex in the past 6 months increased significantly from 46.4％(260/560) to 55.7％(257/461) the percentage of those having commercial sex with males increased significantly from 1.2％(8/692) to 3.0％(18/593) in 2015,while the percentage of those receiving HIV test in the past year decreased significantly from 67.7％(482/712) to 57.6％(346/ 601).Those who were aged ＞25 years,lived in Nanjing for less than 2 years,had a high school or below educational level,failed to consistently use condoms at anal sex in the past 6 months,failed to have HIV test in the past year and were infected with syphilis had higher risk for HIV infection.Conclusion Given the increasing trend of HIV infection and high risk sexual behavior in MSM in Nanjing,it is necessary to strengthen the comprehensive HIV prevention and intervention through expanding HIV test coverage and promoting condom use to curb HIV epidemic in MSM.

[Objective]To investigate the depression status and its influencing factors in HIV/AIDS patients receiving antiviral therapy.[Methods]From July 2022 to September 2022,successive sampling method was used to recruit HIV/AIDS patients receiving antiviral therapy from antiviral treatment institutions in Nanjing,and they were instructed to fill out anonymous questionnaires.The questionnaire collected the basic information of patients,and depression,HIV stigma score and social support level were investigated by Patient Health Questionnaire-9(PHQ-9),Berger HIV stigma scale(BHSS)and Multidimensional Scale of Perceived Social Support(MSPSS).Multivariate Logistic regression was used to an-alyze the influencing factors of depression.[Results]A total of 1879 valid questionnaires were collected in this study,and the detection rate of depression was 50.1%.The results of multivariate logistic analysis showed that compared with patients with middle school or below,the risk of depression was lower for those with postgraduate or above[OR=0.534,95%CI(0.341,0.835),P=0.006].Compared with antiviral therapy duration<1 year,antiviral therapy duration for 1 to 5 years[OR=0.729,95%CI(0.536,0.991)],>5 to 10 years[OR=0.516,95%CI(0.379,0.702)],>10 years[OR=0.603,95%CI(0.375,0.969)]was associated with a lower risk of depression.High level of social support was a protective factor for depression in HIV/AIDS patients compared with middle and low level of social support[OR=0.430,95%CI(0.349,0.530),P<0.001].There was a higher risk of depression with side effects than without side effects[OR=2.260,95%CI(1.833,2.786),P<0.001].The higher the score on the HIV stigma scale,the higher the possibility of depression was.[Conclusion]The detection rate of depression of patients receiving antiviral therapy in Nanjing is high.After starting antivi-ral therapy,we should strengthen the monitoring of side effects and psychological status of patients,carry out psychologi-cal intervention,alleviate psychological problems,and improve the quality of life of patients receiving antiviral therapy.