Relationship between skeletal muscle mass index and metabolic phenotypes of obesity in adolescents / 中国当代儿科杂志

OBJECTIVES@#To study the relationship between skeletal muscle mass index (SMI) and metabolic phenotypes of obesity in adolescents, and to provide a basis for the prevention and control of adolescent obesity and related metabolic diseases.@*METHODS@#A total of 1 352 adolescents aged 12 to 18 years were randomly selected by stratified cluster sampling in Yinchuan City from October 2017 to September 2020, and they were surveyed using questionnaires, physical measurements, body composition measurements, and laboratory tests. According to the diagnostic criteria for metabolic abnormalities and the definition of obesity based on the body mass index, the subjects were divided into four metabolic phenotypes: metabolically healthy normal weight, metabolically healthy obesity, metabolically unhealthy normal weight, and metabolically unhealthy obesity. The association between SMI and the metabolic phenotypes was analyzed using multivariate logistic regression.@*RESULTS@#The SMI level in the metabolically unhealthy normal weight, metabolically healthy obesity, and metabolically unhealthy obesity groups was lower than that in the metabolically healthy normal weight group (P<0.001). Multivariate logistic regression analysis showed that after adjusting for gender and age, a higher SMI level was a protective factors for adolescents to develop metabolic unhealthy normal weight, metabolically healthy obesity, and metabolically unhealthy obesity phenotypes (OR=0.74, 0.60, and 0.54, respectively; P<0.001).@*CONCLUSIONS@#Increasing SMI can reduce the risk of the development of metabolic unhealthy/obesity.

Research Progresses of Tri-Allelic Patterns in Autosomal STR in Forensic DNA Analysis / 法医学杂志

Tri-allelic pattern in autosomal STR is a common abnormal typing phenomenon in forensic DNA analysis, which brings difficulties and uncertainties to the evaluation of the evidence weight in actual cases. This paper reviews the types, formation mechanism, occurrence frequency, genetic pattern and quantitative evaluation of evidence of the tri-allelic pattern in autosomal STR in forensic DNA analysis. This paper mainly explains the formation mechanism and genetic patterns based on different types of tri-allelic pattern. This paper also discusses the determination of tri-allelic pattern and the quantitative method of evidence evaluation in paternity testing and individual identification. This paper aims to provide references for scientific and standardized analysis of this abnormal typing phenomenon in forensic DNA analysis.

Effect of estradiol valerate on expression of adrenergic rceptors in the preoptic area of hypothalamus of ovariectomized rats / 医学研究生学报

Objective The occurrence of perimenopausal hot flashes involves many theories, among which the study of neurotransmitter mechanism has attracted much attention. This study aims to investigate the changes of α1 and α2 adrenoreceptors in the preoptic area of the hypothalamus(POAH) in ovariectomized rats after 4 weeks treatment with estradiol valerate, and explore the potential neurotransmitter mechanism of perimenopausal hot flashes. Methods 30 female Sprague-Dawley rats, weighing 230±10 g and aged 6-8WK, were divided into three groups: ovariectomy (OVX)group , sham group, and ovariectomy plus estradiol valerate (OVX+E2) group, each 10. Rats in sham-operated group opened pelvic cavity to find ovaries, but did not remove them. The other rats underwent bilateral ovariectomy under sterile conditions. Rats in OVX group and (OVX+E2) group received bilateral ovariectomy, rats in OVX group received isotonic saline gavage (10 mg/kg), and rats in (OVX+E2) group received estradiol valerate gavage (0.8 mg /kg). Anesthesia, cardiac perfusion and paraffin section were made after taking the brain. The expression of α1 and α2 adrenoreceptors in POAH of the rats was detected by immunohistochemistry. Results After 4 weeks’ treatment, the number of α1[(54.0±3.9)/100μm2] and α2[(89.0±2.4)/100μm2] adrenoreceptor positive cells in POAH of OVX group significantly decreased compared with that in sham group[(66.3±4.0)、(71.0±2.2)/100μm2](P<0.01),while the number of α1 and α2 [(63.7±4.5)、(73.1±3.5)/100μm2)] adrenoreceptor positive cells in POAH of（OVX+E2 ）group significantly increased compared with that in OVX group(P<0.01). The difference was statistically significant. Conclusion The expression of two adrenergic receptors in the POAH of ovariectomized rats changed. The central noradrenergic system may be involved in the mechanism of perimenopausal hot flashes,which need further studying.

Off-ladder Alleles Detected by Expressmarker22 Kit in Guangdong Han Population / 中山大学学报(医学科学版)

[Objective]To study the rare alleles frequencies and sequences of Expressmarker 22 kit in Guangdong Han Population.[Methods]3495 Samples from unrelated individuals in Guangdong Han Population were screened by using AGCU Expressmarker 22 kit(EX22)and ABI 3100 Genetic Analyzer. Then analyzed the frequencies of the off-ladder(OL)alleles and sequenced the rare alleles obtained based on comparison with the STRBase database and litera-ture.[Results]33 off-ladder alleles with 25 rare alleles were found in 10 STR loci,and allele frequencies ranged from 0.0003~0.0046. Sequencing of the11unreported rare OL alleles showed that most of them have incomplete repeats.[Conclusion]Off-ladder alleles especially the rare alleles are helpful to improve the power of discrimination and the power of exclusion and to provide samples which will be added its allele into ladders These OL-alleles will supplement forensic DNA database.

The chromosome abnormality in forensic DNA test / 复旦学报（医学版）

Chromosome abnormality is a serious congenital disease,which was usually researched in genetic diseases and prenatal diagnosis.In recent years,some special STR profile and pseudo-exclusion case caused by abnormal chromosome are found in forensic DNA test.We reviewed several common chromosome abnormality contained trisomy syndrome,uniparental disomy and Chimera were reported in forensic medicine to provide reference for forensic DNA workers.

Analysis of Clinical Characteristics and Therapeutic Efficacy in 61 Adult Patients with Acute Lymphoblastic Leukemia / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To investigate the clinical characteristics and curative effect in 61 adult patients with acute lymphoblastic leukemia (ALL).</p><p><b>METHODS</b>The clinical data of 61 patients (≥15 years old) with ALL enrolled from January 2010 to December 2014 were studied retrospectively. The relationship between clinical characteristics and curative effect was analyzed. The univariate and multivariate analyses related with the overall survival (OS) and disease free survival (DFS) were conducted by using the method of COX regression analysis.</p><p><b>RESULTS</b>Forty-four patients obtained complete remission (CR) in all 61 cases. The total CR rate was 72.13%. Age of onset, WBC count at first visit, CNS involvement or not, status of myeloid antigen expression and Ph chromosome condition were the important factors affecting the CR rate (P<0.05). The 2 years OS rate of all the 61 cases was 28.13%, the median OS time was 11 months (95% CI 9.58-12.42). The 2 years OS rate and DFS rate of the 44 patients in CR were 39.57% and 34.29% respectively. As showed by univariate analysis, the age of onset, WBC count at first visit, whether achieved CR or not after induction chemotherapy, and whether accepted consolidation therapy or allo-HSCT therapy after CR were factors affecting the prognosis of adult ALL patients. The result of multivariate analysis showed that the older age (P=0.001), induction chemotherapy did not achieve CR (P=0.018) and patients did not received consolidation after CR(P=0.005) , all these were independent risk factors for DFS.</p><p><b>CONCLUSION</b>The CR rate after induction chemotherapy is high in adult ALL patients, but the OS rate is low. To achieve CR and to maintain consolidation treatment after CR may be helpful to improve the long-term survival.</p>

Nonspecific Effect of Stress on Brain Gray Matter Volume in Drug-naive Female Patients with First Depressive Episode / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>This study aimed to observe the differences in brain gray matter volume in drug-naive female patients after the first episode of major depression with and without stressful life events (SLEs) before the onset of depression.</p><p><b>METHODS</b>Forty-three drug-naive female patients voluntarily participated in the present study after the first major depressive episode. The life event scale was used to evaluate the severity of the impact of SLEs during 6 months before the onset of the major depressive episode. High-field magnetic resonance imaging (MRI) scans were obtained, and the VBM and SPM8 software process were used to process and analyze the MRI.</p><p><b>RESULTS</b>Compared to that in patients without SLEs, the volume of brain gray matter was lower in the bilateral temporal lobe, right occipital lobe, and right limbic lobe in the SLE group. However, the gray matter volume did not differ significantly between the two groups after the application of false discovery rate (FDR) correction.</p><p><b>CONCLUSIONS</b>Although the results of the present study suggest the absence of significant differences in brain gray matter volume between female drug-naive patients after the first episode of major depression with and without SLEs after FDR correction, the study provides useful information for exploring the definitive role of stress in the onset of depression.</p>

Genetic Polymorphisms of SNP Located in the 5' Region of VEGF Gene in Han Population in Guangdong / 法医学杂志

OBJECTIVES@#To investigate the genetic polymorphism of SNP located in the 5' region of the vascular endothelial growth factor （VEGF） gene in Han population in Guangdong and provide basic data for forensic application and population genetics research.@*METHODS@#The genetic polymorphisms of 4 SNP loci （rs699947, rs1570360, rs833061, rs2010963） within 5' region of VEGF gene of 184 unrelated individuals in Han population in Guangdong were analyzed by DNA micro sequencing technology SNaPshot. The statistical analysis was carried out by PowerMarker v3.25 software.@*RESULTS@#The genotype distributions of the 4 SNP loci within 5' region of VEGF gene of 184 unrelated individuals in Han population in Guangdong were in accordance with Hardy-Weinberg equilibrium （P>0.05） and 3 kinds of genotypes were detected from each loci. There was high linkage disequilibrium between the rs833061 and rs699947 SNP loci. Six haplotypes were observed, while the frequency of C-G-T-C, C-G-T-G, A-A-C-G and A-G-C-G were more than 10%, which were the main haplotypes. The discrimination probabilities （DP） of rs699947, rs833061, and rs2010963 loci were between 0.583 and 0.634, with the power of exclusion （PE） between 0.133 and 0.144. The DP and PE of haplotypes of 4 SNP were 0.868 and 0.438, respectively.@*CONCLUSIONS@#There are great polymorphisms in the 5' region of VEGF gene in Han population in Guangdong, which could be used as genetic indexes for individual identification and paternity testing, as well as association analysis of the related diseases.

SNP in Differentially Methylated Region Upstream of H19 Gene in Guangdong Han Population / 法医学杂志

OBJECTIVES@#To investigate the single nucleotide polymorphism （SNP） and haplotypes in differentially methylated region （DMR） upstream of H19 gene in Guangdong Han population.@*METHODS@#The PIA typing and restriction enzyme McrBC and HpaⅡ were used to digest the genomic DNA and obtain the individual uniparental DNA template strand. The data of uniparental SNP alleles, genotypes and haplotypes in DMR upstream of H19 gene were obtained by sequencing.@*RESULTS@#A total of 13 SNPs （rs10840167, rs2525883, rs12417375, rs4930101, rs2525882, rs2735970, rs2735971, rs11042170, rs2735972, rs10732516, rs2071094, rs2107425, and rs4930098） and one mutation locus （g7351c） were found. All loci followed the Hardy-Weinberg equilibrium （P>0.05） by statistical analysis. Except for rs12417375 （DP=0.279） locus, the DP of remaining 12 SNPs were 0.446-0.614, and the g7351c mutation locus （DP=0.013） was the particular loci of the Southern Chinese Han population. Eight haplotypes （designated as haplotype 1-8） were detected, in which 3 haplotypes had not yet been reported and the DP, PIC, PE and H were 0.891, 0.714, 0.524 and 0.758, respectively.@*CONCLUSIONS@#Obtained by PIA typing, the SNP in DMR upstream of H19 gene and its haplotypes genetic marker system have a high determination power and show a good practical value in forensic identification.

Effects of compound salvia miltiorrhiza injection on aquaporin 3 expression in human amniotic epithelial cells / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To study the effects of Compound Salvia miltiorrhiza Injection (CSI) on aquaporin 3 (AQP3) expression in human amniotic epithelial cells (hAECs), and to explore its mechanisms for treating oligohydramnios.</p><p><b>METHODS</b>The hAECs selected from 8 human term pregnancies with oligohydramnios and no other complications (as the test group)and 8 human term pregnancies with normal amniotic fluid volume (as the control group) were primarily cultured. The mRNA and protein expressions of AQP3 in hAECs were detected using reverse transcription-polymerase chain reaction and Western blot with various concentrations of CSI (0.000, 0.001, 0.010, 0.020, 0.060, and 0.100 mg/mL, respectively) at different time points (0, 6, 12,24, and 48 h, respectively).</p><p><b>RESULTS</b>(1) Compared with the control group, the AQP3 expression was down-regulated in the test group (P < 0.05). (2) The AQP3 expression in the two groups reached the peak when the concentration of CSI was 0.010 mg/mL, showing statistical difference when compared with other concentrations (P < 0.05). (3) The AQP3 expression reached the peak when 0.010 mg/mL CSI acted for 12 h, showing statistical difference when compared with other concentrations (P < 0.05). (4) The AQP3 expression was up-regulated in the two groups when 0.010 mg/mL CSI acted for 12 h. But the up-regulated AQP3 expression was more obvious in the test group than in the control group (P < 0.05).</p><p><b>CONCLUSIONS</b>CSI could regulate the AQP3 expression in hAECs. CSI showed more obvious effects on the AQP3 expression in hAECs of oligohydramnios human term pregnancies.</p>

Analysis about risk factors of autism disorder in 278 children / 中华实用儿科临床杂志

Objective To explore the high risk factors of the etiology of autism disorder.Methods Two hundred and seventy-eight children with autism disorder and 200 healthy children were investigated with self-designed questionnaire to obtain their demographic information,pre-and perinatal information,developmental information in toddler period.All the data were compared between autism group and healthy controls.Results 1.There were significant dif ferences in maternal prenatal data and perinatal data between autism group and healthy controls.Logistic regression analysis found that maternal/paternal reproductive age,family burden,caregiver,pregnancy reaction,drug administration in prenatal period,mode of delivery,chief instructor entered the regression equation.2.The 6 items in regression equation which had clinical significance consisted of maternal reproductive age above 30 years old [odds ratio (OR) =6.72],family history of mental disorders (OR =5.80),drug administration in prenatal period (OR =4.65),non-natural childbirth (OR =4.15),paternal reproductive age above 30 years old (OR =1.27),moderate or serious pregnancy reaction (OR =1.04).Conclusions The main risk factors of autism disorder in pre-and perinatal period consists of maternal reproductive age above 30 years old,positive family history of mental disorders,drug administration in prenatal period and non-natural childbirth.Avoiding these risk factors might contribute to reduce the incidence of autism.

The effect of the structure of polychlorinated biphenyls on their hydroxylation, oxidation, and glutathionyl conjugation reactions / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To compare the nature of the metabolites formed from the phase I metabolism (hydroxylation and oxidation) and phase II metabolism (glutathionyl conjugation) of PCBs that have different chlorine substitution patterns. To discuss the structure-activity relationships and metabolic mechanisms of PCBs.</p><p><b>METHODS</b>4-Cl-biphenyl (PCB3), 4,4'-Cl-biphenyl (PCB15), 3,4,3',4'-Cl-biphenyl (PCB77) were used for in vitro metabolic study. LC/MS and UV-Vis studies were performed for metabolites identification.</p><p><b>RESULTS</b>The cytochrome P-450 catalyzed hydroxylation rate decreased as the number of chlorine substitutions increased. In this reaction, PCB3 was fully metabolized, approximately half of the PCB15 was metabolized and PCB77 was not metabolized at all. The oxidation rate of PCB15-HQ was higher than that of PCB3-HQ under various oxidation conditions. The LC/MS and UV-Vis data suggest that in the conjugation reaction of PCB15-Q and GSH, the Michael addition reaction occurs preferentially over the displacement reaction.</p><p><b>CONCLUSION</b>The metabolic profiles of polychlorinated biphenyls (PCBs) are dramatically affected by chlorine substitution patterns. It is suggested that the metabolic profiles of PCBs are related to their chlorine substitution patterns, which may have implications for the toxicity of PCB exposure.</p>

The role of MAPK signal pathway in the regulation of AQP3 expression induced by compound danshen injection in human amniotic epithelial cells / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To investigate the role of mitogen-activated protein kinases (MAPKs)-extracellular signal regulated kinase1/2 (ERK1/2) signal pathway in the regulation of Compound Danshen Injection (CDI) induced AQP3 expression in the human amniotic epithelial cells (hAECs).</p><p><b>METHODS</b>hAECs of term pregnancy with normal amniotic fluid volume (AFV) or isolated oligohydramnios were primarily cultured. And the cells were equally divided into four groups, i.e., the vehicle control group, the U0126 group, the CDI group, the CDI + U0126 group. The expressions of phosphorylated ERK1/2 (p-ERK1/2) and AQP3 in hAECs were detected using Western blot analysis.</p><p><b>RESULTS</b>(1) When compared with the control group, the expression level of p-ERK1/2 in hAECs in those with normal AFV and oligohydramnios obviously decreased in the U0126 group (P < 0.05). The expression level of p-ERK1/2 could be elevated in the CDI group (P < 0.05). The expression level of p-ERK1/2 in hAECs was higher in the CDI +U0126 group than in the U0126 group, but lower in the CDI + U0126 group than in the CDI group (P < 0.05). (2) There was no obvious change in AQP3 expression in hAECs with normal AFV between the U0126 group and the vehicle control group (P > 0.05). There was no statistical difference in the expression level of AQP3 between the CDI group and the U0126 +CDI group (P > 0.05), but they were higher than those in the vehicle control group (P < 0.05). (3) Compared with the vehicle control group, the expression level of AQP3 in hAECs with oligohydramnios significantly decreased in the U0126 group and increased in the CDI group (P < 0.05). The expression level of AQP3 was lower in the U0126 + CDI group than in the CDI group, but higher in the U0126 +CDI group than in the U0126 group (P < 0.05).</p><p><b>CONCLUSION</b>CDI could regulate AQP3 expression level in hAECs with oligohydramnios via activating the MAPK-ERK1/2 signal transduction pathway.</p>

Analysis of the relationship between hepatitis B virus precore and basal core promoter mutations and acute-on-chronic liver failure / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To analyze the relationship between hepatitis B virus (HBV) precore (PC) and basal core promoter (BCP) mutations and HBV-related acute-on-chronic liver failure (HB-ACLF).</p><p><b>METHODS</b>Forty-four patients with HB-ACLF and 28 patients with chronic hepatitis B (CHB; used as controls) were enrolled and venous blood samples were collected from all individuals. The PC and BCP gene fragments were amplified by nested PCR. HBV genotype and BCP/PC mutations were determined by direct sequencing and analysis by BioEdit (version 7.0.9.0). Ten of the HB-ACLF patients were selected for follow-up (range: 2-8 weeks), which included once weekly sera collection to determine the relation of mutations and treatment response. Serum levels of HBV DNA were measured by real-time PCR assay, and alanine aminotransferase, total bilirubin, creatinine and albumin were measured by standard biochemical assay and used to determine the MELD score.</p><p><b>RESULTS</b>All 44 HB-ACLF patients were infected with HBV genotype C. In the CHB group, 26 patients were infected with genotype C and two with genotype B. Single mutations (A1762T, G1764A, T1753V, G1896A, and G1899A) and combined mutations (A1762T + G1764A, G1896A + G1899A, T1753V+ A1762T + G1764A, G1896A + G1899A + A1762T + G1764A, and A1762T + G1764A + G1896A) were more frequently detected in HB-ACLF patients than in CHB patients (P less than 0.05). A significantly higher proportion of PC/BCP wild-type sequences was found in patients with CHB than in patients with HB-ACLF (17.9% vs. 2.3%; x² = 5.440, P = 0.020). The proportion of patients carrying both PC and BCP mutations was significantly higher in HB-ACLF patients than in CHB patients (79.6% vs. 39.3%; x² = 12.021, P = 0.001). The proportion of patients carrying only BCP mutation was 42.9% in the CHB group and 20.5% in the HB-ACLF group (x² = 4.157, P = 0.041). No occurrences of only PC mutation were detected in either the CHB or HB-ACLF group. The combined mutations were present in all 10 of the HB-ACLF follow-up patients. Mutations G1899A, T1753V, and A1846T were correlated with disease recovery. Significant decreases in the MELD score were accompanied by decreases in the A1846T mutation.</p><p><b>CONCLUSION</b>Significantly more HB-ACLF patients carried HBV with mutations in the PC and BCP than CHB patients. Moreover, more HB-ACLF patients carried HBV with PC + BCP combined mutations and PC mutation only. The G1899A, T1753C, and A1846T mutations were associated with HB-ACLF response to treatment and improvement in liver function.</p>

Establishment of an internal control for directed differentiation using pluripotent stem cell lines derived from heterozygotic twins / 中华医学遗传学杂志

<p><b>OBJECTIVE</b>To reprogram amniotic fluid cells into pluripotent stem cells in order to create an optimal internal control model for directed cell differentiation.</p><p><b>METHODS</b>Human amniotic fluid-derived cells (hAFDCs) from heterozygotic twin fetuses were induced by retroviral vectors encoding Oct4, Sox2, c-Myc and Klf4. In vivo pluripotency, differentiation capacity and karyotype of hAFDCs induced pluripotent stem cells (hAFDCs-iPSCs) were determined.</p><p><b>RESULTS</b>hAFDC-iPSCs derived from heterozygotic twins have maintained self renewal, with expression of high pluripotency marker gene detected at both mRNA and protein levels. The cells have maintained their differentiation capacity both in vitro and vivo, and showed normal karyotypes after long-term culturing in vitro.</p><p><b>CONCLUSION</b>hAFDCs-iPSCs derived from heterozygotic twins have good consistency in terms of genetic background, and can provide a good internal control for directed differentiation of iPSCs, and may be used an ideal source for autologous cell replacement therapy in the later life of the fetus.</p>

The discrepancy of HBsAg titre and HBV DNA in patients with chronic hepatitis B, HBV-related liver cirrhosis and hepatocellular carcinoma / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To investigate the discrepancy of HBsAg titre and correlation of HBV DNA levels among patients with chronic hepatitis B (CHB), HBV-related liver cirrhosis (LC) and hepatocellular carcinoma (HCC).</p><p><b>METHODS</b>HBsAg titre and HBV DNA in serum samples were measured among 47 CHB, 72 LC and 54 HCC cases using Abbott chemiluminescence and fluorescence quantitative PCR, respectively. Statistical analyses among multiple groups, between two groups and about the correlation were performed using Kruskal-Wallis test, Mann-Whitney U test and Spearman test, respectively.</p><p><b>RESULTS</b>The median HBsAg titre level in serum samples decreased from 2361.10 IU/ml in CHB cohort to 1001.64 IU/ml in LC cohort and 594.35 IU/ml in HCC cohort, suggesting a statistically significant difference (x2 = 24.394, P less than 0.05). Moreover, HBsAg titre in CHB group was significantly higher than that in LC group ( Z = -3.754, P less than 0.05). CHB patients had significantly higher HBsAg titre than HCC cases ( Z = -4.630, P less than 0.05). However, there was no statistically significant difference in HBsAg titre between LC and HCC group. Among HBeAg positive patients, HBsAg titre decreased from 3259.83 IU/ml in CHB group to 1077.30 IU/ml in LC group and 789.72 IU/ml in HCC group, indicating a significant difference (x2 = 15.643, P less than 0.01). Among HBeAg negative patients, HBsAg titre declined from 1669.00 IU/ml in CHB group to 1001.64 IU/ml in LC group and 582.05 IU/ml in HCC group, suggesting of a significant difference (x2 = 6.423, P less than 0.05). Positive correlation between HBsAg titre and HBV DNA was found in CHB ( r = 0.297, P less than 0.05), LC (r = 0.346, P less than 0.05) and HCC (r = 0.452, P less than 0.05), respectively.</p><p><b>CONCLUSION</b>HBsAg titre level in serum decreased progressively from CHB to LC and HCC group. There were positive correlations between HBsAg titre and HBV DNA level in CHB, LC and HCC.</p>

Analysis on the relationship between condom social norms and unprotected anal intercourse among men who have sex with men in Beijing / 中华流行病学杂志

Objective To understand the prevalence of and factors associated with unprotected anal intercourse(UAI)among men who have sex with men(MSM)in Beijing.Methods Five hundred MSM were recruited for a survey using Respondent Driven Sampling (RDS)method, from September to October in 2009. A computer-assisted, interviewer-administered questionnaire was used to gather information including demographics, sexual behaviors and condom use social norms(a scaled number). Variables were evaluated by using RDSAT and SAS software.Results Mean age of the participants was 30.6 years, with 96.0% of them as Han ethnicity and68.5% having had at least high school or higher education level. 72.8% of them were unmarried, with 61.7% of them identified themselves as homosexual, 61.2% had ＞ 1 male partners in the past six months, and the prevalence of UAI was 42.0%. Significant bivariate predictors of UAI would include condom use social norms score, role for anal sex with male sex partner, number of male sexual partners in the past 6 months and amount of alcohol consumed. In multivariable analysis, UAI was associated with a higher condom use social norms score(AOR= 1.2, 95%CI: 1.1-1.3), receptive anal intercourse(AOR=2.0, 95%CI: 1.3-3.2)and drinking alcohol more than 3 times per month in the past 12 months(AOR=1.6, 95%CI: 1.1-2.5). Conclusion The prevalence of UAI was high in the MSM community in Beijing, suggesting that efforts should be targeting on how to make the condom use a social norm and being promoted.

The prevalence of HIV infection and the risk factors among MSM in 4 cities, China / 中华预防医学杂志

<p><b>OBJECTIVES</b>To access the prevalence of HIV infection and the associated factors among urban MSM in China.</p><p><b>METHODS</b>Participants were recruited using respondent driven sampling and snowball sampling method in Beijing, Harbin, Zhengzhou and Chengdu city. A face-to-face questionnaire was administrated to collect relevant demographic and ethological data; 5 ml venous blood sample was taken from each subject to measure HIV antibody in serum (samples were first screened by colloidal gold, latex chromatographic and double-antigen sandwich ELISA method, positive samples were further confirmed by immunoblotting method). The characteristics of HIV infection was described and the risk factors were analyzed.</p><p><b>RESULTS</b>A total of 1864 MSM were recruited and the prevalence of HIV was 6.7% (125/1864). It was 9.5% (24/252) among MSM older than 39 years and it was 1.9% (2/105) among those less than 20 years old. The prevalence was 8.4% (31/371) among MSM with junior level education and was 4.8% (41/858) among those with college level education. It was 10.3% (35/340) among MSM with sexual partner old than him for over 10 years while it was 5.0% (58/1168) among those having sexual partner within 10 years older. The prevalence of HIV infection was 8.9% (61/695) among MSM with unprotected receptive anal sex and it was 5.5% (64/1169) among those without unprotected receptive anal sex. The risk factors independently associated with HIV infection included being older than 39 years (OR = 6.5, 95%CI: 1.5 - 28.7), with junior or lower level education (OR = 1.8, 95%CI: 1.2 - 2.7), having sexual partner older than himself for over 10 years (OR = 2.1, 95%CI: 1.3 - 3.3) and having unprotected receptive anal intercourse (OR = 1.6, 95%CI: 1.1 - 2.4).</p><p><b>CONCLUSION</b>MSM had a high rate of HIV infection. Older age, lower level education, having older sexual partner and unprotected receptive anal intercourse were related to HIV infection.</p>

The immunostimulatory study on peripheral blood mononuclear cell and CD4+ T lymphocyte of HBV infections that were activated by CpG oligonucleotide / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To study the effects of CpG oligodeoxyribonucleotide (ODN) as adjuvant on the immune responses in PBMC and CD4+ T cell with chronic hepatitis B virus.</p><p><b>METHODS</b>The selected 20 infections were averagely divided two groups. The frequency of IFN-gamma secreting PBMC and CD4+ T cell in immune tolerant phase and in the immune clearance phase that had stimulated by CpG ODN, HBsAg and Mixture [CpG ODN + HBsAg] were analyzed by enzyme linked immune spot (ELISOT).</p><p><b>RESULTS</b>The PBMC and CD4+ T cell were differently incubated by CpG ODN, HBsAg and M [CpG ODN + HBsAg]. The number of IFN-gamma spot differently are 3 +/- 8, 339 +/- 429, 375 +/- 496, 1 +/- 4, 5 +/- 16 and 5 +/- 12; the results of immume tolerance are 3 +/- 8, 361 +/- 153, 375 +/- 276, 0 +/- 2, 2 +/- 2 and 4 +/- 4; but the results of immune clearance are 3 +/- 21, 289 +/- 345, 405 +/- 656, 2 +/- 14, 8 +/- 40 and 7 +/- 30. The IFN-gamma spots statistical analysis of PBMC were differently incubated by HBsAg and M, the total is P = 0.720, The IFN-gamma spots statistical analysis of CD4+ T cell were differently incubated by HBsAg and M, the total is P = 0.890, The IFN-gamma spots statistical analysis of PBMC and CD4+ T cell were differently incubated by M, the total is P = 0.000.</p><p><b>CONCLUSIONS</b>The ability that CpG ODN can not significantly increase the IFN-gamma secreting of PBMC and CD4+ T cell that were incubated by HBsAg to the infection in immune tolerant phase and in the immune clearance phase, but the PBMC outweighed The CD4 T cell.</p>

Epidemiological study on the status of HIV/STDs and relative behaviors among MSM in Beijing / 中华流行病学杂志

<p><b>OBJECTIVE</b>To understand the infected status of human immunodeficiency virus (HIV), sexually transmitted disease (STD) and relative risk behaviors of men who have sex with men (MSM) in Beijing.</p><p><b>METHODS</b>Respondent-driven sampling (RDS) was adopted to recruit target population and to conduct behavior and serological studies among MSM. RDSAT 5.5 was used to analyze data.</p><p><b>RESULTS</b>Among 427 MSM, the age distribution was as follows: below 30 and less than 35 were 65.4% and 81.0% respectively. 69.2% (95% CI: 63.9-75.5) of them had 12 years or less of education. 73.3% (95% CI: 66.7-79.8) of them were non-Beijing registered residents. The urban and rural registered residents almost accounted for half of all the recruits. HIV positive rate was 4.6% (95% CI: 2.2-7.6) while 56.3% (95% CI: 50.9-62.5) of them reported having had bisexual sex preference. Only 14.8% (95% CI: 10.8-19.6) of them had ever had HIV test, while 22.8% (95% CI: 18.7-27.8) reported ever having had STDs. 55.3% (95% CI: 49.3-61.9) and 55.1% (95% CI: 48.7-61.3) of them had unprotected insert and receptive anal sex over the last 6 months.</p><p><b>CONCLUSION</b>Data from the HIV positive rate showed that there was a trend of increase among MSM in Beijing which called for urgent care to them.</p>