Corneal endothelial cells act as an ion pump and barrier to maintain corneal transparency and normal physiological function.Once injured, adult corneal endothelial cells are compensated by the migration and expansion of peripheral cells.Excessive injury leads to corneal endothelial decompensation, resulting in corneal edema and visual loss.At present, the common treatment is corneal endothelial transplantation.In recent years, the mechanism of endothelial cell proliferation, differentiation and adhesion has been extensively studied.Alternative therapies for corneal transplantation have also been proposed, including endothelial cell regeneration, induced pluripotent stem cell differentiation, cell transplantation, tissue engineering, and artificial endothelial layer.Cell transplantation and artificial endothelial layer have been approved for clinical trials, while others are still in the basic research stage and their clinical effects are still uncovered.This article reviews the research progress on corneal endothelial cell decompensation in order to find a solution to the shortage of corneal donors and to achieve clinical transformation of scientific research results as soon as possible.

Objective:To investigate the significance of urinary 8-oxo-7, 8-dihydroguanosine(8-oxoGuo)in assessing the short-term prognosis of sepsis in frail elderly patients.Methods:We conducted a cross-sectional study involving 62 frail elderly patients diagnosed with sepsis who were admitted to the Emergency Intensive Care Unit(EICU)at Beijing Hospital between March 2021 and March 2022.Based on their 28-day prognosis, the patients were categorized into two groups: those who died and those who survived.Upon admission, we collected urine samples and clinical data from both groups.We employed isotope dilution high-performance liquid chromatography-mass spectrometry to measure the levels of the RNA oxidation marker 8-oxoGuo in the urine.Results:A total of 62 frail elderly patients[aged(85.1±6.3)years]diagnosed with sepsis were included in the study, comprising 36 patients in the 28-day mortality group and 26 patients in the survival group.Univariate analysis revealed that the survival group had significantly lower body temperature, blood calcitonin(PCT)levels, sequential organ failure assessment(SOFA)scores, and urinary 8-oxoGuo levels compared to the mortality group.Additionally, the survival group exhibited a higher mean arterial pressure(MAP)than the mortality group, with all differences reaching statistical significance(all P<0.05).Spearman correlation analysis indicated that urinary 8-oxoGuo levels were positively correlated with both PCT and SOFA scores in frail elderly sepsis patients( r=0.426, 0.768, both P<0.05).Furthermore, logistic regression analysis identified urinary 8-oxoGuo and SOFA as independent risk factors for 28-day mortality in this population( OR=1.936, 1.427; P=0.006, 0.002).The area under the receiver operating characteristic curve(AUC)for urinary 8-oxoGuo and SOFA in predicting the 28-day prognosis of frail elderly sepsis patients was 0.761 and 0.741, respectively, both demonstrating statistical significance(both P<0.001). Conclusions:Our findings suggest that urinary 8-oxoGuo possesses strong predictive value for the short-term prognosis of sepsis in this vulnerable population.

Objective:To analyze the nonlinear correlation and inflection points between age and short-term mortality in patients with negative systemic inflammatory response syndrome (SIRS)sepsis score.Methods:A retrospective cohort study was conducted using the medical information mart for intensive care Ⅳ(MIMIC-Ⅳ)database, which included adult patients with sepsis who were admitted to the intensive care unit(ICU)within 24 hours and did not receive mechanical ventilation or vasoactive drug, with a SIRS score ≤1.Patients were divided into survivors and non-survivors based on 28-day survival.Baseline variables such as age, gender, Charlson Comorbidity Index(CCI), body mass index(BMI), Sequential Organ Failure Assessment(SOFA)score, and initial lactate levels were compared between the two groups.With case fatality rate as the dependent variable, variables with differences in univariate analysis were incorporated into the binary logistic regression model, and baseline variables with statistically significant differences except age were matched according to the 1∶3 propensity score.Restricted cubic spline (RCS) regression was used to analyze the nonlinear relationship between patient age and mortality after matching and to determine the inflection point.Results:A total of 53 150 hospital records in the MIMIC-Ⅳ database were retrospectively screened, and 1 691 adult patients[aged(69.82±14.87)years]diagnosed with sepsis and negative SIRS score within 24 hours of ICU admission were included, with 101(5.97%)deaths within 28 days.Patients in the non-survivor group were older [(73.63±14.55)years vs.(69.58±14.86)years, t=-2.663, P=0.008], had higher CCI(4.38±2.64 vs.2.99±2.34, t=-5.732, P<0.001), and higher SOFA score (8.18±3.58 vs.5.04±2.67, t=-8.664, P<0.001)compared to the survivor group.There were no significant differences in gender, BMI, initial lactate levels, and the suspected infection sites (all P>0.05).Multivariable logistic regression analysis showed that increased age ( OR=1.03, 95% CI: 1.02-1.05, P<0.001), increased CCI ( OR=1.16, 95% CI: 1.06-1.26, P<0.001), and increased SOFA score ( OR=1.34, 95% CI: 1.26-1.43, P<0.001)were significantly associated with increased mortality in patients with negative SIRS score.After including SOFA score and CCI in the propensity score matching, there were 271 survivors and 93 non-survivors.RCS results showed a non-linear association between age and mortality( Poverall=0.001, Pnon-linear=0.001), with a significant increase in the OR for mortality when age exceeded 73 years. Conclusions:In sepsis patients with comparable organ function, the short-term mortality rate of patients with negative SIRS score increases non-linearly with age.These patients have mild symptoms but poor clinical outcomes, necessitating early and enhanced monitoring when age exceeds 73 years.

Corneal endothelial cells act as an ion pump and barrier to maintain corneal transparency and normal physiological function.Once injured, adult corneal endothelial cells are compensated by the migration and expansion of peripheral cells.Excessive injury leads to corneal endothelial decompensation, resulting in corneal edema and visual loss.At present, the common treatment is corneal endothelial transplantation.In recent years, the mechanism of endothelial cell proliferation, differentiation and adhesion has been extensively studied.Alternative therapies for corneal transplantation have also been proposed, including endothelial cell regeneration, induced pluripotent stem cell differentiation, cell transplantation, tissue engineering, and artificial endothelial layer.Cell transplantation and artificial endothelial layer have been approved for clinical trials, while others are still in the basic research stage and their clinical effects are still uncovered.This article reviews the research progress on corneal endothelial cell decompensation in order to find a solution to the shortage of corneal donors and to achieve clinical transformation of scientific research results as soon as possible.

Objective:To analyze the nonlinear correlation and inflection points between age and short-term mortality in patients with negative systemic inflammatory response syndrome (SIRS)sepsis score.Methods:A retrospective cohort study was conducted using the medical information mart for intensive care Ⅳ(MIMIC-Ⅳ)database, which included adult patients with sepsis who were admitted to the intensive care unit(ICU)within 24 hours and did not receive mechanical ventilation or vasoactive drug, with a SIRS score ≤1.Patients were divided into survivors and non-survivors based on 28-day survival.Baseline variables such as age, gender, Charlson Comorbidity Index(CCI), body mass index(BMI), Sequential Organ Failure Assessment(SOFA)score, and initial lactate levels were compared between the two groups.With case fatality rate as the dependent variable, variables with differences in univariate analysis were incorporated into the binary logistic regression model, and baseline variables with statistically significant differences except age were matched according to the 1∶3 propensity score.Restricted cubic spline (RCS) regression was used to analyze the nonlinear relationship between patient age and mortality after matching and to determine the inflection point.Results:A total of 53 150 hospital records in the MIMIC-Ⅳ database were retrospectively screened, and 1 691 adult patients[aged(69.82±14.87)years]diagnosed with sepsis and negative SIRS score within 24 hours of ICU admission were included, with 101(5.97%)deaths within 28 days.Patients in the non-survivor group were older [(73.63±14.55)years vs.(69.58±14.86)years, t=-2.663, P=0.008], had higher CCI(4.38±2.64 vs.2.99±2.34, t=-5.732, P<0.001), and higher SOFA score (8.18±3.58 vs.5.04±2.67, t=-8.664, P<0.001)compared to the survivor group.There were no significant differences in gender, BMI, initial lactate levels, and the suspected infection sites (all P>0.05).Multivariable logistic regression analysis showed that increased age ( OR=1.03, 95% CI: 1.02-1.05, P<0.001), increased CCI ( OR=1.16, 95% CI: 1.06-1.26, P<0.001), and increased SOFA score ( OR=1.34, 95% CI: 1.26-1.43, P<0.001)were significantly associated with increased mortality in patients with negative SIRS score.After including SOFA score and CCI in the propensity score matching, there were 271 survivors and 93 non-survivors.RCS results showed a non-linear association between age and mortality( Poverall=0.001, Pnon-linear=0.001), with a significant increase in the OR for mortality when age exceeded 73 years. Conclusions:In sepsis patients with comparable organ function, the short-term mortality rate of patients with negative SIRS score increases non-linearly with age.These patients have mild symptoms but poor clinical outcomes, necessitating early and enhanced monitoring when age exceeds 73 years.

Objective:To investigate the significance of urinary 8-oxo-7, 8-dihydroguanosine(8-oxoGuo)in assessing the short-term prognosis of sepsis in frail elderly patients.Methods:We conducted a cross-sectional study involving 62 frail elderly patients diagnosed with sepsis who were admitted to the Emergency Intensive Care Unit(EICU)at Beijing Hospital between March 2021 and March 2022.Based on their 28-day prognosis, the patients were categorized into two groups: those who died and those who survived.Upon admission, we collected urine samples and clinical data from both groups.We employed isotope dilution high-performance liquid chromatography-mass spectrometry to measure the levels of the RNA oxidation marker 8-oxoGuo in the urine.Results:A total of 62 frail elderly patients[aged(85.1±6.3)years]diagnosed with sepsis were included in the study, comprising 36 patients in the 28-day mortality group and 26 patients in the survival group.Univariate analysis revealed that the survival group had significantly lower body temperature, blood calcitonin(PCT)levels, sequential organ failure assessment(SOFA)scores, and urinary 8-oxoGuo levels compared to the mortality group.Additionally, the survival group exhibited a higher mean arterial pressure(MAP)than the mortality group, with all differences reaching statistical significance(all P<0.05).Spearman correlation analysis indicated that urinary 8-oxoGuo levels were positively correlated with both PCT and SOFA scores in frail elderly sepsis patients( r=0.426, 0.768, both P<0.05).Furthermore, logistic regression analysis identified urinary 8-oxoGuo and SOFA as independent risk factors for 28-day mortality in this population( OR=1.936, 1.427; P=0.006, 0.002).The area under the receiver operating characteristic curve(AUC)for urinary 8-oxoGuo and SOFA in predicting the 28-day prognosis of frail elderly sepsis patients was 0.761 and 0.741, respectively, both demonstrating statistical significance(both P<0.001). Conclusions:Our findings suggest that urinary 8-oxoGuo possesses strong predictive value for the short-term prognosis of sepsis in this vulnerable population.

Background: Feline panleukopenia virus (FPV) is a widespread and highly infectious pathogen in cats with a high mortality rate. Although Yanji has a developed cat breeding industry, the variation of FPV locally is still unclear. Objectives: This study aimed to isolate and investigate the epidemiology of FPV in Yanji between 2021 and 2022. Methods: A strain of FPV was isolated from F81 cells. Cats suspected of FPV infection (n = 80) between 2021 and 2022 from Yanji were enrolled in this study. The capsid protein 2 (VP2) of FPV was amplified. It was cloned into the pMD-19T vector and transformed into a competent Escherichia coli strain. The positive colonies were analyzed via VP2 Sanger sequencing. A phylogenetic analysis based on a VP2 coding sequence was performed to identify the genetic relationships between the strains. Results: An FPV strain named YBYJ-1 was successfully isolated. The virus diameter was approximately 20–24 nm, 50% tissue culture infectious dose = 1 × 10 −4.94 /mL, which caused cytopathic effect in F81 cells. The epidemiological survey from 2021 to 2022 showed that 27 of the 80 samples were FPV-positive. Additionally, three strains positive for CPV-2c were unexpectedly found. Phylogenetic analysis showed that most of the 27 FPV strains belonged to the same group, and no mutations were found in the critical amino acids. Conclusions A local FPV strain named YBYJ-1 was successfully isolated. There was no critical mutation in FPV in Yanji, but some cases with CPV-2c infected cats were identified.

Objective:To investigate the clinical characteristics of elderly patients with coronavirus disease 2019(COVID-19), in order to provide scientific evidence for the diagnosis and treatment of COVID-19 in elderly patients.Methods:Clinical data of 102 patients with COVID-19 admitted to the B11 East Ward of the Zhongfaxincheng campus and the E1-3 ward of the Guanggu Campus of Tongji Hospital affiliated to Huazhong University of Science and Technology in Wuhan from 1 February 2020 to 28 February 2020 were retrospectively collected and analyzed.Patients were categorized into 2 groups: the elderly group(≥60 years old)and the young and middle-aged group(<60 years old). Differences in epidemiological features, demographics, clinical symptoms, laboratory results and imaging findings between the two groups were retrospectively analyzed.Results:Among 102 patients with COVID-19, 58 were in the elderly group(≥60 years old), with a median age of 67.0(63.8, 71.0)years old, and 44 in the young and middle-aged group(<60 years old), with a median age of 47.5(38.0, 51.8)years old.There was no significant difference in gender ratio between the two groups( χ2=0.033, P=0.855). Of 102 patients, 42.0%(21/50)had close contact with an infected person, 14.0%(7/50)were from infection clusters, and 18.0%(9/50)had suspected hospital-acquired infections.Fever and cough remained the most common symptoms, but gastrointestinal symptoms such as nausea, poor appetite, diarrhea and muscle cramps were also warning signs.Fatigue and cough were the most common presenting symptoms in elderly male patients.Bilateral patchy infiltrates(57.9%, 22/38)and ground-glass opacities(42.1%, 16/38)were the main imaging features and 42.1%(16/38)patients had multiple areas of the lungs involved.Over 50% patients had increased levels of blood glucose, D-dimer, fibrinogen, C-reactive protein, procalcitonin, multiple cytokines and neutrophil-to-lymphocyte ratio, as well as decreased levels of albumin, hemoglobin, hematocrit, lymphocytes and serum calcium.Compared with the young and middle-aged group, the elderly group had higher rates of abnormality in levels of D-dimer and serum calcium( χ2=7.067 and 4.166, P=0.008 and 0.041). Conclusions:Fever and cough are the most common symptoms in elderly patients with COVID-19.Elderly patients with COVID-19 have multiple abnormalities in clinical laboratory test results, which show a certain level of specificity compared with young and middle-aged patients.

The standard surgery intern orientation is very important. The surgery intern orien-tation is completed by surgery education division (SED) in the U.S.A. The orientation includes speech from director of surgery department. the interaction part presided by surgical teachers, topic groups for discussing. Then the faculties of SED will explain the core competences which are required by accred-itation council on graduate medical education (ACGME), educational activities of department, the re-view process for resident physicians. The orientation also includes occupation development plan for residents; manners, teamwork and communication to patients; surgical basic skills training, system management, feedback and evaluation etc. The expectation of this article is for the improvement of Chinese surgery intern orientation.

Objective To investigate the characteristics of early changes in serum IL-17 and IFN-γ levels in elderly patients with acute myocardial infarction (AMI).Methods 70 hospitalized elderly patients with AMI and 35 healthy people were selected.Serum level of interleukin-17 (IL 17) and interferon-γ (IFN-γ) were assayed by enzyme linked immunosorbent assay (ELISA).Results Serum levels of IL17 and IFN-γ showed increasing trends in elderly patients with AMI as compared with that in control group,but there were no significant differences between the two group [(35.73 30.28) pg/ml vs.(28.70±17.12) pg/ml,(15.29±14.64) pg/ml vs.(11.38±10.10) pg/ml,t=0.144 and 0.138,P=0.365 and 0.377].There were correlations between serum IL-17 and IFN γ levels in patients with AMI and controls(r=0.936 and 0.989,both P=0.00).Serum levels of IL-17 or IFN-γhad no significant differences between AMI patients with well and poor prognosis [(35.43± 34.36) ng/L vs.(36.11±30.16) ng/L,(13.90±13.98) ng/L vs.(15.99±14.14) ng/L,U=0.266 and 0.166,P=0.687 and 0.668].Conclusions Serum IL-17 level has an increasing trend in AMI patients within 24h,but has no statistical significant.Serum IL 17 level has a significantly positively correlation with serum IFN γ level in the elderly,but serum levels of IL-17 or IFN γ have no significant correlations with short term prognosis in elderly patients with AMI.