Objective:To analyze the effect of endoscopic submucosal tunnel dissection on patients with large esophageal superficial neoplasms.Methods: Chosen patients with large esophageal superficial neoplasms in our hospital as research object, randomly divided into control group treated by endoscopic mucosal dissection (ESD) and observation group treated by endoscopic submucosal tunnel dissection(ESTD), compared surgery related indicators, complications and treatment outcomes.Results: 1)Observation group patients’ tumor stripping rate (23.17±4.73)/min was significantly higher than control group patients’ (12.65±2.19)/min; Intraoperative blood loss(9.14±0.67)ml, total length of hospital stay (7.34±1.89) d, were significantly less than control group patients with intraoperative blood loss(21.38±3.14)ml, total length of hospital stay (13.21±3.05)d, t value was 4.965, 5.395, 4.932, respectively(t=4.965,t=5.395,t=4.932;P<0.05); 2)Observation group patients esophageal bleeding ESTD rate(5.26%), esophageal stricture rate(31.58%), mediastinal emphysema rate(5.26%), esophageal perforation rate of 0, were significantly less than control group patients with esophageal bleeding rate(31.58%), esophageal stricture rate(5.26%), mediastinal emphysema rate(21.05%), esophageal perforation rate (26.32%), t value were 4.378, 4.378, 4.471, 5.758, (t=4.378,t=4.378,t=4.471,t=5.758;P<0.05); 3)Observation group patients with no recurrence during the follow-up period, control group patients with local recurrence rate of 21.05%, t value 8.623,P<0.05(t=8.623, P<0.05).Conclusion: Endoscopic tunnel mucosal stripping technique can effectively improve the complete tumor removal rate, during the process of optimization operation at the same time reduce the occurrence of complications, to the improvement of the prognosis of patients with positive clinical significance.

OBJECTIVE:To establish a method for determination of trace platinum in zolpidem tartrate. METHODS:Graphite furnace atomic absorption spectrometry(GFAAS)was adopted for direct determination after dissolving sample in 1% Hydrochloric acid solution. Horizontal platform graphite tube was performed with detection wavelength of 244.79 nm,slit width of 0.2 nm and current intensity of hollow cathode lamp of 6 mA. The mode of background correction was zeeman effect,the peak height was used as measurement pattern,and the injection volume was 20 μl. RESULTS:The linear range of platinum was 0-100 ng/ml(r=0.999 0);RSDs of precision and reproducibility tests were no more than 2.0%;recovery was 97.78%-103.07%(RSD=1.6%,n=9);the detection limit was 1.48 ng/ml. CONCLUSIONS:This method is simple and rapid with good precision and accuracy,and can be applied for the determination of trace platinum in zolpidem tartrate.

Objective:To investigate methods of molecular diagnosis and clinical features of 46, XY disorders of sexual development(DSD).Methods:A total of 206 cases of 46, XY DSD patients, who visited the Shanghai Ninth People′s Hospital, Shanghai Jiaotong University School of Medicine, from July 2009 to June 2021, underwent AA chip based on multiplex PCR and probe-capture-targeted next-generation sequencing. Clinical features of patients with genetic diagnosis were analyzed.Results:Among 206 patients, the diagnostic rate of patients with micropenis, hypospadias and cryptorchidism was the highest, up to 75.28%. Almost all patients had different degrees of undermasculinized external genitalia. The most frequent phenotype was micropenis with hypospadias(87.25%). Only one gene variant was detected in 81 patients(39.32%), multiple genetic variants were detected in 104 patients(50.49%), and no gene variant was identified in 21 patients(10.19%). 107 patients had definite genetic diagnosis, with a diagnostic rate of 51.94% by adding the pathogenic and likely pathogenic ratios following the American College of Medical Genetics and Genomics(ACMG) guidelines, including 40 patients of steroid 5α-reductase type 2(SRD5A2) variants(37.38%), 36 patients of androgen receptor(AR) variants(33.64%), 13 patients of steroidogenic factor 1(NR5A1) variants(16.82%), 6 patients of 17β-hydroxysteroid dehydrogenases 3(HSD17B3) variants(5.61%), 2 patients of 17α-hydroxylase/17, 20-lyase enzyme(CYP17A1), Wilms′ tumor 1(WT1) and GATA binding protein 4(GATA4) variants(1.87%), and one patient of luteinizing hormone receptor(LHCGR) variant(0.93%). Gynecomastia was found in 29 of 81 postpubertal patients, of which 25(86.21%) had AR variants.Conclusions:46, XY DSD presents complex clinical manifestations and molecular etiologies. Targeted nextgeneration sequencing has the advantages of high throughput, high efficiency and low cost, which has a high value especially in etiological diagnosis of 46, XY DSD with large genetic heterogeneity.

The pandemic of coronavirus disease 2019 (COVID-19) is changing the world like never before. This crisis is unlikely contained in the absence of effective therapeutics or vaccine. The papain-like protease (PLpro) of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) plays essential roles in virus replication and immune evasion, presenting a charming drug target. Given the PLpro proteases of SARS-CoV-2 and SARS-CoV share significant homology, inhibitor developed for SARS-CoV PLpro is a promising starting point of therapeutic development. In this study, we sought to provide structural frameworks for PLpro inhibitor design. We determined the unliganded structure of SARS-CoV-2 PLpro mutant C111S, which shares many structural features of SARS-CoV PLpro. This crystal form has unique packing, high solvent content and reasonable resolution 2.5 Å, hence provides a good possibility for fragment-based screening using crystallographic approach. We characterized the protease activity of PLpro in cleaving synthetic peptide harboring nsp2/nsp3 juncture. We demonstrate that a potent SARS-CoV PLpro inhibitor GRL0617 is highly effective in inhibiting protease activity of SARS-CoV-2 with the IC

OBJECTIVETo understand the current situation and characteristics of commercial sexual behavior among old male clients in Guangxi, and to explore the associated risk factors of HIV infection.

METHODSThe areas in Guangxi where more old male HIV cases were reported followed by survey on those male clients who were over 60 years of age, were selected. A total of 5 ml blood sample was collected to test antibodies of HIV and syphilis. Risk factors were calculated by the multivariate logistic analysis method.

RESULTSA total of 1 236 questionnaires were completed in the survey. 65.61% of the old male clients were from low-grade venues with 53.64% of them never using a condom when engaging in commercial sex behavior. 47.33% of them patronized sex workers for around 10 years. 53.32% of them patronized prostitutes not less than 2 times in the last 30 days. Thirty subjects were HIV positive (2.43%) and 40 were syphilis positive (3.24%). Factor as 'having fixed partners' (OR = 0.302, 95% CI:0.140-0.650) appeared protective for the old male clients of HIV infection, with a history of patronizing sex workers from 1 to 5 years (OR = 2.552, 95% CI: 1.086-5.998). Frequency of patronizing sex workers not less than 4 times in the last 30 days (OR = 3.002, 95%CI:1.047-8.607) seemed the high risk factor of HIV infection.

CONCLUSIONOlder-aged male clients showed high HIV and syphilis infection rates in Guangxi, and most of them were using the low-grade venues. Commercial sexual behaviors in the areas would include early and, frequent exposure, but with poor protections. High risk factors of HIV infection might relate to "no fixed sexual partners" and "frequently commercial sexual behavior".

Aged ; Antibodies ; China ; epidemiology ; Condoms ; HIV Infections ; epidemiology ; Humans ; Male ; Middle Aged ; Risk Factors ; Sex Work ; statistics & numerical data ; Sex Workers ; Sexual Behavior ; Sexual Partners ; Surveys and Questionnaires ; Syphilis ; epidemiology