Laboratory testing is a vital chain in the prevention and control of genital chlamydia trachomatis infection. The prevalence of genital chlamydia trachomatis infection is high, but the detection rate of the infection is low in men who have sex with men (MSM) in China. Self-sampling for genital chlamydia trachomatis detection by MSM is a new option to address this problem, which would play a significant role in expanding genital chlamydia trachomatis infection screening in this population. This paper summarizes the progress in research of self-sampling for the detection of genital chlamydia trachomatis and the related factors in MSM both at home and abroad to provide reference for the promotion of self-sampling for the detection of genital chlamydia trachomatis in this population.

Long non-coding RNA(lncRNA)is a class of endogenous non-coding RNA with a length of more than 200 nt.Due to lack of open reading frame(ORF),they lack the ability to directly encode proteins,but they play a crucial role in gene regulation.They are widely involved in epigenetics,transcription,translation,modification and degradation,thereby affecting the life activities of the body,and their expression imbalance is closely related to the occurrence and development of diseases.Therefore,analyzing the inherent characteristics of lncRNA and revealing its intrinsic role can not only deepen our understanding of human physiological and pathological processes,but also provide new ideas and potential solutions for the diagnosis,prevention and treatment of diseases.So as to provide references for the related research of lncRNAs.

Objective To analyze the incidence of and risk factors for white matter hyperintensity(WMH)in pilots.Methods A retrospective case-control study was performed.The subjects were 1,415 pilots ages 19 to 58 who had undergone cranial MRI examination in a hospital between September 2020 and August 2023.They were divided into two groups:the WMH group and the control group(without WMH).Univariate and multivariate logistic regression analysis were used to identify the risk factors for WMH.Results There were 219 cases in the WMH group and 1,196 cases in the control group.The total incidence of WMH was approximately 15.48％,with mild,moderate and severe cases of WMH accounting for 70.78％,24.20％,and 0.47％,respectively.Regression analysis results showed that age(OR=1.625,95％CI:1.099-2.404)and flight time(OR=1.282,95％CI:1.033-1.592)were risk factors for WMH in pilots.Conclusion The incidence of WMH in pilots was approximately 15.48％.Most of WMH were mild according to Fazekas grading.Age increase and long flight time are risk factors for WMH in pilots.

Objective To explore the value of CT derived fractional flow reserve(CT-FFR)combined with pericoronary adipose tissue(PCAT)fat attenuation index(FAI)in predicting major adverse cardiac events(MACE)in patients with obstructive coronary heart disease(CHD).Methods A total of 149 patients with obstructive CHD who underwent coronary computed tomography angiography(CCTA)examination were analyzed retrospectively.The patients were divided into MACE group and non-MACE group according to the occurrence of MACE.The clinical data,CCTA characteristics,CT-FFR,PCAT volume and FAI differences between the two groups were compared.Multiple logistic regression analysis was used to screen the independent predictors of MACE.The area under the curve(AUC)of the receiver operating characteristic(ROC)curve was used to evaluate the efficiency of a single independent predictor and its joint prediction of MACE.Results CT-FFR≤0.8 and right coronary artery(RCA)FAI(RCA-FAI)were independent risk factors for MACE in patients with obstructive CHD.The AUC of CT-FFR≤0.8 and RCA-FAI to predict MACE in patients with obstructive CHD were 0.773 and 0.766,respectively,while of their combination was 0.865.Conclusion Compared with single imaging parameters,the combined imaging parameters of CT-FFR and RCA-FAI can significantly improve the predictive efficiency of MACE in patients with obstructive CHD.

Objective: To understand the prevalence of Chlamydia trachomatis (CT) infection and its associated factors among asymptomatic outpatients attending sexually transmitted disease (STD)-related clinics in Shenzhen and provide evidence for development of future interventions. Methods: From April 15 to May 16, 2018, a cross-sectional study was conducted and patients attending STD-related Clinics were recruited from 22 medical institutions in Nanshan, Luohu, Bao'an, Longgang, Yantian, and Longhua districts of Shenzhen. After the informed consent from each participant was obtained, social-demographic information was collected through a structured questionnaire and urine samples were collected for CT nucleic acid detection. In addition, logistic regression was used to explore associated factors of CT infection. Results: In asymptomatic outpatients, the prevalence of CT infection was 7.16% (250/3 492). Being single (aOR=2.29, 95%CI:1.65-3.16), without registered Shenzhen residency (aOR=1.49, 95%CI:1.04-2.13), and without previous CT testing in the past year (aOR=2.04, 95%CI:1.03-4.05) were the risk factors of CT infection in asymptomatic outpatients. Among participants without registered Shenzhen residency, 89.25% (2 176/2 438) were college-degree or below, and 51.29% (1 255/2 447) were aged ≤30 years, and the risk of CT infection among those ≤30 years old was 1.73 times higher than those >30 years old (95%CI:1.28-2.34). Conclusions: The prevalence of CT infection was high among asymptomatic outpatients attending STD-related clinics in Shenzhen. Routine CT screening should be carried out for this population, especially for those with sexually active age, being single, with low educational level, and without previous CT testing in the past year. Also, raising their awareness of knowledge and adverse outcomes of CT infection should be considered to promote routine CT screening and timely treatment.
Adult ; Chlamydia Infections/epidemiology* ; Chlamydia trachomatis ; Cross-Sectional Studies ; Humans ; Nucleic Acids ; Outpatients

Monkeypox is a zoonotic viral disease caused by monkeypox virus infection. Monkeypox has become a public health emergency of international concern, since it first spread widely in many regions outside Africa in 2022. Accurate and effective detection methods are particularly important for the diagnosis and screening of monkeypox virus infection. This review summarizes laboratory testing techniques for monkeypox virus in recent years, and compares principles and detection performance of microscopy, culture, nucleic acid testing and immunological methods.

Objective: To investigate the mediating effect of insomnia among mobile phone addiction, aggressive behaviors and self-perceived identity among university students. Methods: A total of 740 university students were sampled from five universities in Binjiang District, Hangzhou City using a cluster random sampling method. The mobile phone addiction, aggressive behaviors and self-perceived identity were assessed using the Mobile Phone Addiction Index Scale, the Athens Insomnia Scale, the Chinese college students' version of the Buss-Perry Aggression Questionnaire, and the Self-Perceived Identity Scale, and the mediating effect of insomnia among mobile phone addiction, aggressive behaviors and self-perceived identity was examined using Process macro program and Bootstrap method. Results: A total of 740 questionnaires were allocated, and 700 valid questionnaires were recovered, with an effective recovery rate of 94.59%. The respondents included 221 men (31.57%) and 479 women (68.43%), and there were 607 respondents with a specialty of medicine (86.71%). There were 331 participants detected with mobile phone addiction (47.29%), 90 with aggressive behaviors (12.86%) and 289 with low-level self-perceived identity (41.29%), and the prevalence rates of mild, moderate, severe and extremely severe insomnia were 28.00%, 26.14%, 26.43% and 19.43% among respondents, respectively. Mobile phone addiction had a direct predictive effect on aggressive behaviors (β=0.301, P<0.001) and self-perceived identity (β=-0.129, P<0.001), and presented an indirect predictive effect on aggressive behaviors (effect of mobile phone addiction on insomnia: β=0.083, P<0.001; effect of insomnia on aggressive behaviors: β=0.999, P<0.001; effect of insomnia on self-perceived identity: β=-0.698, P<0.001). The contributions of mediating effects caused by insomnia were 21.61% and 31.02% to total effects. Conclusions Insomnia presents partial mediating effects among mobile phone addiction, aggressive behaviors and self-perceived identity among university students. Mobile phone addiction may directly affect aggressive behaviors and self-perceived identity, and indirectly affect aggressive behaviors and self-perceived identity via insomnia.

Objective: To investigate the anti-photoaging effects of human umbilical cord mesenchymal stem cells derived extracellular vesicles (hucMSC-EVs) on dermal fibroblasts. Methods: Human fibroblasts were pretreated with hucMSC of different concentrations for 24 hours before ultraviolet B (UVB) irradiation. Immediately post irradiation, the intracellular reactive oxygen species (ROS) were analyzed using reactive oxygen detection kit. After 72 hours irradiation, cell proliferation was assessed using CCK-8 assay, and the percentage of senescent cells was evaluated by β-galactosidase (SA-β-gal) staining. Results: The UVB irradiation increased intracellular ROS level, decreased the cell proliferation from 100% to(77.33±2.89)%, and increased the percentage of SA-β-gal positive senescent cells from (6.70±0.46)% to (17.67±1.53)%. The hucMSC-EVs pretreatment decreased the intracellular ROS level, stimulated cell proliferation from (77.33±2.89)% to (90.67±2.52)% and( 96.00±5.57)% , and decreased the positive rate of SA-β-gal positive cells from (17.67±1.53)% to (8.38±0.56)% and (7.07±1.10)%. Conclusions The hucMSC-EVs preconditioning may protect dermal fibroblasts from UVB induced photoaging, by reducing intracellular ROS.

Chlamydia trachomatis (Ct) is the causative agent of bacterial sexually transmitted diseases (STDs) worldwide.The incidence of Ct infection has exceeded that of Neisseria gonorrhoeae,and becomes the highest in STDs in many countries.Ct infection can lead to urethritis,epididymitis,prostatitis and infertility in males,and cervicitis,endometritis,pelvic inflammatory disease,infertility in females,and neonatal conjunctivitis.Additionally,urogenital Ct infection is always ignored due to its concealed symptoms,leading to a long clinical course,recurrence or repeated infections.Furthermore,Ct infection can increase the risk of human immunodeficiency virus and human papilloma virus infections.Therefore,how to prevent and control the transmission of Ct has become one of the global public health issues.Currently,a growing body of researches have focused on the molecular epidemiological characteristics of Ct,which are aiming to identify the mutant strains,elaborate transmission dynamics,investigate the distribution of Ct serotypes in different populations,so as to provide molecular epidemiological evidence for the prevention and control of Ct infection.This review summarizes the epidemic status and research methods for molecular epidemiological characteristics of Ct,as well as application of Ct serotyping in clinical practice,providing references for the prevention,control and research of Ct infection.