Objective To investigate the impact of SARS-CoV-2 infection on male semen quality through meta-analysis and retrospec-tive study.Methods Literature retrieval was conducted in PubMed,CNKI,Wanfang Database and CBM database.Meta-analysis was performed using Stata 15.0.The male patients meeting the inclusion criteria from our hospital were enrolled as study subjects.General demographic data and semen parameters were collected.Single factor analysis of variance and graphing of semen parameters were con-ducted using GraphPad Prism 9.5.1.The test level was set at 0.05.Results A total of 9 studies involving 267 patients were included in the meta-analysis.There were no significant differences in sperm concentration and survival rate before and after SARS-CoV-2 infec-tion(P＞0.05).Semen volume and percentage of normal morphology significantly increased during 1-3 months after infection(P=0.005,P=0.010),with semen volume recovering to pre-infection level＞3 months later(P＞0.05).Sperm motility and progressive mo-tility increased＞3 months after infection(P=0.046,P=0.045),recovering to pre-infection levels(P=0.099,P=0.098).Sperm DNA fragmentation index may be temporarily elevated within 3 months after infection but gradually decreased＞3 months later.In the retrospective study of 8 cases,there were no statistical differences in semen parameters at different stages compared with pre-infection(P＞0.05),but semen parameters showed a negative trend during＜1 month after infection and recovered to pre-infection levels＞3 months later.Conclusion The results of this laboratory study are basically consistent with the meta-analysis.SARS-CoV-2 infection in males only caused short-term negative effects on sperm morphology,vitality and DNA integrity,but generally recovered to pre-infection levels＞3 months after infection.Due to the limitations of study subjects and sample size,the impact of SARS-CoV-2 infection on male semen quality needs to be further confirmed by long-term large-scale prospective studies.

Objective:To develop the Fecal Microbiota Transplantation Knowledge, Attitude, and Practice Scale for Patients with Inflammatory Bowel Disease (IBD), and test its reliability and validity.Methods:Guided by the theory of knowledge, attitude, and practice, a preliminary draft of the scale was formed through literature review, Delphi expert consultation, and pre-survey. From May to August 2022, convenience sampling was used to select 200 IBD patients who visited the Gastroenterology Clinic of three ClassⅢ Grade A comprehensive hospitals in Jiangsu Province as the research subject for a questionnaire survey. The critical ratio method, correlation analysis method, internal consistency method, commonality and factor loadings were used for item analysis of the scale. Exploratory factor analysis, content validity index, and internal consistency reliability were applied to test the reliability and validity of the scale.Results:A total of 200 questionnaires were distributed, and 181 valid questionnaires were collected, with an effective response rate of 90.50% (181/200). The Fecal Microbiota Transplantation Knowledge, Attitude, and Practice Scale for Patients with IBD included three dimensions of knowledge, attitude and practice, with a total of 21 items. The content validity index at the scale level was 0.917, and the content validity index at the item level ranged from 0.833 to 1.000. Exploratory factor analysis extracted three common factors, with a cumulative variance contribution rate of 74.197%. The Cronbach's α coefficient of the total scale was 0.951, and the coefficients of each dimension were 0.914 to 0.942. The test-retest reliability coefficient of the total scale was 0.918, and the test-retest reliability coefficients of each dimension ranged from 0.737 to 0.833.Conclusions:The Fecal Microbiota Transplantation Knowledge, Attitude, and Practice Scale for Patients with IBD has good reliability and validity, which can help medical and nursing staff evaluate patients' understanding and acceptance of microbial transplantation, so as to provide a basis for personalized communication in shared decision making between doctors and patients.

Objective : To investigate the predictive value of platelet volume distribution width ( PDW) , mean platelet volume (MPV) , and D ⁃dimer (D⁃D) on early shunt dysfunction in patients with decompensated cirrhosis treated with transjugular intrahepatic portosystemic shunt(TIPS) . Methods : A total of 28 patients with decompensated cirrhosis who developed shunt dysfunction within 6 months after TIPS were selected as the case group , and a 1 ∶ 2 matched control study was conducted. 56 patients matched by age ( ± 2) and gender who did not develop shunt dysfunction within 6 months after TIPS were selected as the control group. Spss23. 00 software was used to conduct univariate analysis to obtain statistically significant variables , and then conditional Logistic regression analysis was conducted with paired design , with P < 0. 05 being statistically significant. Results : Patients with a history of splenectomy , portal vein thrombosis , and those with poor liver function grade were more likely to have functional dysfunction after TIPS. Platelet count (PLT) , platelet volume distribution width (PDW) , mean platelet volume (MPV) , D ⁃dimer ( D⁃D) and Fibrinogen monomer ( FDPI) had statistically significant differences between the case group and the control group. The values of D ⁃D、PDW、MPV and FDPI in the case group were higher than those in the control group , while the value of PLT in the case group was lower than that in the control group. The OR values of PDW , MPV and D ⁃D were 2. 164 , 3. 826 and 1. 382 , respectively. ROC analysis results showed that the areas under PDW , MPV and D ⁃D curves were 0. 746 , 0. 773 and 0. 690 , respectively. Conclusion Compared with ultrasound , D ⁃D , PLT and PDW could predict shunt dysfunction earlier after TIPS. Patients with normal shunt function indicated by color Doppler ultrasonography in postoperative follow⁃up of TIPS should be closely observed for indicators such as D ⁃D , PLT and PDW , which is of important significance for clinical indication of shunt dysfunction in TIPS.

Objective:To explore the application effect of structural formula based continuous nursing in colorectal cancer patients with ostomy.Methods:Using the convenient sampling method, a total of 128 patients with colorectal cancer stoma who were admitted to Liuzhou Worker's Hospital from July 2019 to September 2021 were selected as the research objects. According to the random number table method, they were divided into the observation group and the control group, with 64 cases in each group. Patients in the observation group received structural continuous nursing, while patients in the control group received traditional continuous care. Exercise of Self-Care Agency Scale (ESCA) and the Medical Outcomes 36-items Short Form Health Survey (SF-36) scores were compared between the two groups.Results:After 3 months of intervention, ESCA and SF-36 scores in the observation group were higher than those in the control group, and the differences were statistically significant ( P<0.05) . Conclusions:Structural formula based continuous nursing can improve the self-care ability and quality of life of colorectal cancer patients with ostomy.

During the COVID-19 epidemic, our national guidelines have suggested that surgical patients should wear a mask to decrease the potential transmission of COVID-19 in the operating room, as long as the condition allows. However, so far, there is no study to discuss the influence of wearing a mask on the ventilation and blood oxygenation status in patients of spontaneous breathing with supplementary oxygen through an anesthetic facemask. This is a before-after study in the same patient, and 10 healthy volunteers were recruited, by testing the arterial blood gas parameters at key time points before and after oxygen inhalation to evaluate the effects of two different supplementary oxygen methods ('disposable medical mask + anesthetic facemask' and 'anesthetic facemask only') on the oxygenation of subjects. Our data demonstrated whether wearing a disposable medical mask or not could effectively increase the oxygen supply of the subjects compared with the basic value before oxygen inhalation; however, compared with the group without mask, the arterial oxygen partial (PaO
COVID-19 ; Healthy Volunteers ; Humans ; Masks ; Oximetry ; Oxygen/blood*

BACKGROUND: Studies have shown that umbilical cord mesenchymal stem cells are ideal seed cells for tissueengineering research.OBJECTIVE: To isolate, culture and identify tree shrew umbilical cord mesenchymal stem cells, in order toestablish a standardized tree shrew umbilical cord mesenchymal stem cell lines.METHODS: Caesarean-isolated tree shrew umbilical cord samples were used to isolate and culture umbilical cordmesenchymal stem cells using tissue explant adherent method. Flow cytometry assay was used to detect cellsurface markers. Osteogenic and adipogenic induction media were used to induce umbilical cord mesenchymalstem cells to differentiate into osteoblasts and adipocytes.RESULTS AND CONCLUSION: The cultured umbilical cord mesenchymal stem cells expressed CD90 and CD105 with the positive rate of 99.9% and 99.8% respectively. Hematopoietic stem cell marker CD34 expression ratewas 0.0% and the endothelial cell marker CD31 expression rate was 0.7%, in line with the characteristics of umbilicalcord mesenchymal stem cell surface markers. Calcium nodules by alizarin red staining and lipid droplets by oil red Ostaining were observed in the induced cells. These experimental findings indicated that umbilical cord mesenchymalstem cells from tree shrews capable of osteogenic and adipogenic differentiation were successfully isolated and cultured.

Objective: To explore the relationship between 1eptin receptor gene Gln223Arg polymorphism and metabolism syndrome (MS) with its impact on cardiac structure and function.
Methods: Our research included 2 groups:MS group, n=167 patients with ifrst diagnosed MS without treatment in our hospital from 2005-10 to 2008-6 and Control group, n=216 healthy subjects from regular physical examination. Blood pressure, biochemical features, insulin levels and echocardiography were detected;leptin receptor Gln223Arg genotypes were measured by PCR-RFLP;the above indexes were compared between 2 groups.
Results:The patients in MS group had the higher frequency of A allele than Control group. The MS occurrence rate in allele A carrier was 3.302 times higher than allele G carrier (P=0.000;95%CI 2.432-4.483). The patients in MS group already had left ventricular hypertrophy and impaired diastolic function. Compared with MS G allele carriers, the A allele carriers had the higher BMI, blood pressure, glucose, fasting glucose and insulin levels, longer waist circumference, more serious dyslipidemia and insulin resistance, left ventricular hypertrophy and impaired diastolic function.
Conclusion: Leptin receptor gene Gln223Arg polymorphism is associated with the increased risk of MS occurrence and left ventricular hypertrophy.

Objective To investigate the correlation between leptin receptor(LEPR)gene Gln223Arg variation with metabo-lism syndrome and its influence on ambulatory blood pressure .Methods Totally 167 patients with metabolism syndrome were se-lected and contemporaneous 216 individuals undergoing the physical examination were selected as the control group .The blood pres-sure ,ambulatory blood pressure ,biochemical indicators and insulin were detected in all the subjects .The DNA polymorphology a-nalysis was performed by adopteint PCR—restricted fragment length polymorphism(RFLP) .The Gln223Arg genotype was judged by electrophoresis and sequencing .Results Three genotypes of AA ,GG and AG were detected .The frequency of carrying A alleles in the metabolism syndrome group was significantly higher than that in the control group .The occurrence risk of metabolism syn-drome and non—dipper type blood pressure rhythm for carrying allele A was 3 .302 times(P=0 .000;95% CI:2 .432 —4 .483)and 2 .506 times of carrying allele G(P=0 .000 ;95% CI:1 .566 —4 .008) .The patients with AA genotype had higher BMI ,blood pres-sure ,blood glucose and fasting insulin levels ,more serious dyslipidemia ,greater waist circumference and higher insulin resistance in-dex .The patients with metabolism syndrome carrying A allele also had higher ambulatory blood pressure indexes .Conclusion LEPR gene Gln223Arg polymorphism A allele carrier has the great risk for metabolism syndrome occurrence ,higher ambulatory blood pressure ,moreover is more inclined to non—dipper type blood pressure rhythm .

BACKGROUND:Systemic lupus erythematosus is an autoimmune disease characterized as an emergence of a variety of autoantibodies in serum and multi-system and multi-organ lesions. Currently, there is a lack of effective treatment options, and umbilical cord mesenchymal stem cel s are a promising therapy for systemic lupus erythematosus based on cel biological roles. OBJECTIVE:To observe the therapeutic efficacy of human umbilical cord mesenchymal stem cel transplantation in the treatment of systemic lupus erythematosus in mice. METHODS:Human umbilical cord mesenchymal stem cel s were isolated and cultured fol owed by labeling with DiR fluorescence. Experimental mice were divided into normal control group (C57BL mice), model control group (C57BL/lpr mice), low-, medium-and high-dose umbilical cord mesenchymal stem cel therapy groups (C57BL/lpr mice), with 10 mice in each group. Mice in the low-, medium-and high-dose groups were respectively injected 0.5×106, 1×106, 2×106 human umbilical cord mesenchymal stem cel s, once a week, for 3 consecutive weeks. At the end of treatment, blood samples were col ected to measure antinuclear antibody, anti-histone antibody, anti-double stranded DNA antibody changes;OPG and Foxp3 gene expression changes were detected by quantitative PCR method. RESULTS AND CONCLUSION:After treatment, the levels of anti-nuclear antibodies, anti-histone antibodies and anti-double stranded DNA antibodies in the peripheral blood of mice were al declined in the low-, medium-and high-dose groups, while the number of peripheral blood CD4+CD25+T cel s was significantly elevated. OPG and Foxp3 gene expression was also increased dramatical y in the low-, medium-and high-dose groups, which was similar to that in the normal control group and significantly different from that in the model control group (P<0.01). Experimental findings demonstrate that after transplantation of human umbilical cord mesenchymal stem cel s, al relevant indicators in C57BL/lpr mice recovered to the normal levels, and the high-dose treatment group had the most obvious effect.

Objective:To analyze the chicken egg-white extracts were co-cultured with cells whether elevated stem cells protein,whether the cells transformation into stem cell.Methods:Four kinds of cells,making a common culture,a 50% chicken egg-white extract co-cultured for 3 days,cells were collected and frozen at -80 degrees,sending the company to do stem cell protein microarray.Results:C57-BMSC has three proteins occurred statistically significant change , TS-UC-MSC has one proteins occurred a statistically significant change ,293T has one protein occurred a statistically significant change ,and 293T-GFP has one protein occurred a statistically significant change.Conclusion:50% chicken egg-white extract co-cultured cells,the cells occurred the phenomenon of transformation into stem cells.