Objective To investigate the epidemiological characteristics and risk factors of hyperhomocysteinemia(HHcy)in military aircrew.Methods A retrospective study was conducted on 506 aircrew convalescents undergoing health examination from September 2023 to April 2024.Demographic,lifestyle,and biochemical data were analyzed.The risk factors of HHcy were identified by x2 test and multivariate Logistic regression.Results The HHcy detection rate was 21.94%(111/506),with a median homocysteine(Hcy)level of 11.75(9.70-14.30)μmol/L.Multivariate analysis revealed that smoking(OR=2.093,95%CI:1.313-3.336),service in conventional fighter aircraft(OR=1.716,95%CI:1.063-2.770),elevated low-density lipoprotein cholesterol(LDL-C)(OR=2.510,95%CI:1.413-4.458),and elevated bilirubin(OR=2.360,95%CI:1.509-3.691)were independent risk factors for HHcy(all P<0.05).Conclusion There is a high prevalence of HHcy in military pilots.It is strongly associated with smoking,aircraft type,and metabolic abnormalities.It is recommended to incorporate Hcy testing into routine physical examination,implement risk factor-based stratified interventions,and establish an atherosclerotic cardiovascular diseases early warning system integrating vascular imaging and risk assessment,aiming to reduce cardiovascular risks and safeguard combat effectiveness.

Objective To analyze the current research on cardiovascular diseases in pilots using bibliometric methods,so as to provide reference for future researches.Methods Articles indexed by China National Knowledge Infrastructure(CNKI)were selected as the research objects.The time window ranged from January 1990 to February 2024,and the keywords"pilot or flight personnel"and"cardiovascular"were selected to search for all published literatures on cardiovascular diseases in pilots.CiteSpace 6.1.R6 software was used to analyze the authors,institutions,and keywords of the included literatures,and a visual analysis graph was drawn.Results A total of 198 articles were included in this study.The journal with the most published articles was the Chinese Journal of Aerospace Medicine and Aviation Military Medicine.The author with the most published articles was Wang Lujin,followed by Zheng Jun.The institution with the most published articles was Air Force General Hospital(Air Force Medical Center).Risk factors,hypertension,and health assessment were hot keywords.The emerging word was medical appraisal.Conclusion The literatures of cardiovascular diseases among pilots are mainly published in aviation medical journals,forming a research team led by Wang Lujin and Zheng Jun.Research cooperation is mainly within the research team members,with less cooperation between research institutions.The research hotspots are risk factors of cardiovascular disease,hypertension,and health identification,and the forefront of research is the medical identification of cardiovascular diseases among pilots.With the increasing importance of cardiovascular diseases among pilots,it is necessary to strengthen cooperation among research institutions in the future,promote high-quality development in this field,and focus on strengthening scientific research in the prevention of cardiovascular diseases to maintain the physical and mental health of pilots.

Objective To investigate the effect of ursodeoxycholic acid(UDCA)on the symptoms after severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)infection in patients with primary biliary cholangitis(PBC)and their family member.Methods A questionnaire survey was conducted to collect related information from 171 PBC patients who attended The First Affiliated Hospital of Air Force Medical University before March 22,2023 and 128 family members,including demographic information,comorbidities,UDCA administration,SARS-CoV-2 infection,vaccination,symptoms,therapeutic medication,and the changes in liver disease-related symptoms.The independent-samples t test or the Mann-Whitney U test was used for comparison of continuous data between two groups,and the chi-square test or the Fisher's exact test was used for comparison of categorical data between two groups.Results The median age was 51 years in the PBC patients and 49 years in the family members,with no significant difference between the two groups(P>0.05).Compared with the family member group,the PBC group had significantly lower body mass index(22.2±2.4 kg/m2 vs 23.3±2.9 kg/m2,P<0.001)and proportion of male individuals(10%vs 55%,P<0.001).All PBC patients received UDCA at a dose of 13—15 mg/kg,and SARS-CoV-2 infection rate was 100%in both groups.The family members had a significantly higher SARS-CoV-2 vaccination rate than the PBC patients(91%vs 57%,P<0.001).Compared with the family members,the PBC patients had significantly milder symptoms of sneezing,nasal obstruction,chest pain,and abnormal taste(P<0.05).Compared with the family members,the PBC patients had significantly lower rates of use of compound cold medicine(11%vs 20%,P<0.05)and Lianhua Qingwen capsules(12%vs 21%,P<0.05).For the PBC patients after SARS-CoV-2 infection,the liver disease-related symptoms such as fatigue,abdominal distension,dry mouth and dry eyes,pruritus,and yellow skin were aggravated by 37%,2%,27%,10%,and 3%,respectively.Conclusion Compared with the immediate family members of PBC patients who do not take UDCA,the PBC patients receiving UDCA do not show a reduction in SARS-CoV-2 infection rate,but UDCA may have a certain effect on alleviating infection-related symptoms in such patients.PBC patients may still experience the aggravation of liver disease-related symptoms after SARS-CoV-2 infection,and the long-term effect on PBC patients after SARS-CoV-2 infection should be taken seriously in clinical practice.

In traditional clinical teaching of impacted tooth extraction, there are problems including limited observation fields for students, insufficient doctor-patient communication training, inadequate clinical thinking development, and low levels of clinical participation. Based on the core elements of visualizing jaw structure with perspective, formulating clinical strategy, immersing in clinical participation, and cultivating the spirit of caregiving, we developed a virtual reality simulation teaching platform for the clinical decision analysis of impacted tooth extraction. The virtual simulation-based platform can create three different impacted tooth scenarios in 3D, which demonstrates the process of clinical decision analysis of impacted tooth extraction through virtuality-reality interaction, allowing students to immerse in the discovery, analysis, and resolution of the medical and humanistic problems in the process of impacted tooth extraction. The questionnaire survey showed that 81.36% (48/59) of the students believed that the software could improve their clinical thinking ability; 76.27% (45/59) of the students believed that it could help them master the basic process of impacted tooth extraction; and 62.71% (37/59) of the students believed that it could improve their skills of impacted tooth extraction. By providing immersive learning experience, constructive teaching design, and multi-dimensional teaching evaluation, the software achieved the goals of cultivating students' clinical thinking ability and professional literacy in oral and maxillofacial surgery.

Objective To investigate the protective effect of herba artemisiae scopariae extract on multidrug resistance protein 3(MDR3)gene mutation-induced neonatal parenteral nutrition-associated cholestasis(PNAC)and its possible mechanism.Methods ①Human primary hepatocytes were treated with cell culture in vitro,CRISPR/Cas9 lentivirus infection and MDR3 mutant gene lead-in.The levels of hepatic and biliary biochemical indexes[alanine transaminase(ALT),aspartate transaminase(AST),total bilirubin(TBil),direct bilirubin(DBil),indirect bilirubin(IBil),total bile acid(TBA)]in the supernatant of hepatocytes before and after 16,32,48 hours were compared to determine the time required for fatty acid induction of PNAC hepatocyte model with MDR3 gene mutation.② Human primary hepatocytes were divided into blank control group,MDR3 gene wild type group,MDR3 gene mutation group,and herba artemisiae scopariae extract intervention group according to random number table method.The blank control group was treated with culture medium only,the MDR3 gene wild type group was infected with lentivirus and mixed with wild type MDR3 gene and culture medium,the MDR3 gene mutation group was infected with lentivirus and cultured in culture medium with the mutant genes lead-in of LV-MDR3KI(c.485T>A,c.2793insA,c.1031G>A,c.3347G>A)mutation,while the MDR3 mutant gene was lead-in by lentivirus infection and cultured in culture medium,and then pretreated with 100 g/L herba artemisiae scopariae extract in the herba artemisiae scopariae extract intervention group,then the four groups of hepatocytes were induced with 1%fat emulsion,and the treatment time was the time needed to construct the PNAC hepatocytes model with MDR3 gene mutation.The levels of ALT,AST,TBil,DBil,IBil and TBA in the supernatant of hepatocytes were measured by enzyme-linked immunosorbent assay(ELISA).The mRNA expression abundance of adenosine triphosphate binding cassette proteins(ABCB4,ABCB11,ABCC2,ABCC3,ABCC4)encoding MDR3,bile salt export pump(BSEP),multidrug resistance associated protein(MRP)2-4,and tumor necrosis factor-α(TNF-α)genes were detected by real-time fluorescence quantitative polymerase chain reaction(RT-qPCR).Results Compared to the blank control group and MDR3 gene wild type group,there was no significant difference in the levels of ALT,AST,TBil,DBil,IBil,TBA in the supernatant of MDR3 gene mutant group before and 16 hours after induction with 1%fat emulsion,however after treated with 1%fat emulsion for 32 hours and 48 hours,the levels of ALT,AST,TBil,DBil,IBil,TBA in the supernatant of MDR3 mutant hepatocytes were significantly increased(P<0.05),consequently the time required for fatty acid induction of PNAC hepatocyte model was 32 hours.At 32 hours after treatment with fat emulsion,the levels of ALT,AST,TBil,DBil,TBA in the supernatant of hepatocytes in the herba artemisiae scopariae extract intervention group were significantly decreased[ALT(ng/L):148.3±2.3 vs.164.9±7.0,AST(ng/L):2767.4±78.8 vs.3239.4±107.1,TBil(μmol/L):7.6±0.2 vs.13.6±0.3,DBil(μmol/L):1.8±0.1 vs.5.7±0.2,TBA(μmol/L):3.4±0.2 vs.6.7±0.1,all P<0.05].The ABCB4,ABCC2,ABCC3,ABCC4 mRNA expression of MDR3,MRP2,MRP3,MRP4 in the blank control group,MDR3 wild type group,MDR3 gene mutation group and the herba artemisiae scopariae extract intervention group had no significant difference.The expression of TNF gene mRNA was highly expressed in MDR3 gene mutation group(2-??Ct:1.258±0.200 vs.1.001±0.052),and was low expressed in the herba artemisiae scopariae extract intervention group(2-??Ct:0.387±0.247 vs.1.258±0.200),and there was a significant difference between the two groups(both P<0.05).Compared to the MDR3 gene mutation group,the ABCB11 gene encoding BSEP mRNA expression in the herba artemisiae scopariae extract intervention group was significantly increased(2-??Ct:2.955±0.479 vs.1.333±0.529,P<0.05).Conclusion The herba artemisiae scopariae extract has a protective effect on PNAC induced by MDR3 gene mutation,which may be related to antagonizing inflammatory reaction,decreasing the expression of TNF mRNA and improving the expression of ABCB11 gene encoding BSEP.

Arrhythmogenic cardiomyopathy (ACM), a fatal heart disease characterized by fibroadipocytic replacement of cardiac myocytes, accounts for 20% of sudden cardiac death and lacks effective treatment. It is often caused by mutations in desmosome proteins, with Desmoglein-2 (DSG2) mutations as a common etiology. However, the mechanism underlying the accumulation of fibrofatty in ACM remains unknown, which impedes the development of curative treatment. Here we investigated the fat accumulation and the underlying mechanism in a mouse model of ACM induced by cardiac-specific knockout of Dsg2 (CS-Dsg2 ^-/-). Heart failure and cardiac lipid accumulation were observed in CS-Dsg2 ^-/- mice. We demonstrated that these phenotypes were caused by decline of fatty acid (FA) β-oxidation resulted from impaired mammalian target of rapamycin (mTOR) signaling. Rapamycin worsened while overexpression of mTOR and 4EBP1 rescued the FA β-oxidation pathway in CS-Dsg2 ^-/- mice. Reactivation of PPARα by fenofibrate or AAV9-Pparα significantly alleviated the lipid accumulation and restored cardiac function. Our results suggest that impaired mTOR-4EBP1-PPARα-dependent FA β-oxidation contributes to myocardial lipid accumulation in ACM and PPARα may be a potential target for curative treatment of ACM.

Objective:In order to explore the impact of corona virus disease 2019(COVID-19)on the hospitalization of children with bronchiolitis and to improve clinicians′ understanding of the characteristics of bronchiolitis during the COVID-19 epidemic.Methods:This was a multicenter clinical study, and the data have been collected from 23 children′s medical centers in China.All the clinical data were retrospectively collected from children with bronchiolitis who were hospitalized at each study center from January 1, 2019 to December 31, 2021.The results included gender, age at hospitalization, length of stay, respiratory syncytial virus(RSV) test results, severity rating, ICU treatment, and the total number of children hospitalized with respiratory tract infection during the same period.The clinical data of children with bronchiolitis in 2019 before COVID-19 epidemic and in 2020、2021 during COVID-19 epidemic were statistically analyzed and compared.Results:According to a summary of data provided by 23 children′s medical centers, there were 4 909 cases of bronchiolitis in 2019, 2 654 cases in 2020, and 3 500 cases in 2021.Compared with 2019, the number of bronchiolitis cases decreased by 45.94% in 2020 and 28.70% in 2021.In 2019, 2020 and 2021, there were no significant differences in gender ratio, age, and duration of hospitalization.Compared with 2019, the ratio of bronchiolitis to the total number of hospitalizations for respiratory tract infection decreased significantly in 2020 and 2021( χ2=12.762, P<0.05; χ2=84.845, P<0.05).The proportion of moderate to severe bronchiolitis cases in both 2020 and 2021 was lower than that in 2019, and the difference was statistically significant ( χ2=4.054, P<0.05; χ2=8.109, P<0.05).There was no statistically significant difference in the proportion of bronchiolitis cases requiring ICU treatment between 2019, 2020, and 2021 ( χ2=1.914, P>0.05).In 2019, a total of 52.60%(2 582/4 909) of children with bronchiolitis underwent RSV pathogen testing, and among them, there were 708 cases with RSV positive, accounting for 28.00%.In 2020, 54.14%(1 437/2 654) of children with bronchiolitis underwent RSV pathogen testing, and there were 403 cases with RSV positive, accounting for 28.04%.In 2021, 66.80%(2 238/3 500) of children with bronchiolitis underwent RSV pathogen testing, and there were 935 cases with RSV positive, accounting for 41.78%.Compared with 2019 and 2020, the RSV positive rate in 2021 showed a significant increase( χ2=99.673, P<0.05; χ2=71.292, P<0.05). Conclusion:During the COVID-19 epidemic, the implementation of epidemic prevention and control measures reduced the hospitalization rate and severity of bronchiolitis, but did not reduce the positive rate of RSV detection.

Objective:To explore the clinical efficacy of ultrasound-indicated cervical cerclage in twin pregnancies.Methods:This retrospective cohort study included 96 asymptomatic twin pregnancies with cervix length (CL)≤2.5 cm at 16-27 +6 weeks indicated by transvaginal ultrasound from January 2013 to May 2022 in Fujian Maternity and Child Health Hospital. They received either cervical cerclage (cerclage group, n=45) or conservative treatment (conservative group, n=51). The subgroup analysis was further performed after stratifying the subjects into the CL≤1.0 cm subgroup, the CL>1.0-≤1.5 cm subgroup, and the CL>1.5 cm subgroup. Two independent samples t-test, Mann-Whitney U test, and Chi-square test were used to compare the differences in the pregnancy and perinatal outcomes between different groups. Multivariate logistic regression was used to analyze the impact of cervical cerclage on pregnancy outcomes of women with different CLs. Results:The average gestational age at delivery and the prolonged gestation were significantly greater in the cerclage group than those in the conservative group [35.9 (34.9-37.0) weeks vs 34.9 (29.1-36.1) weeks; 10.7 (9.6-13.1) weeks vs 8.7 (4.8-11.0) weeks, Z=－2.59 and -3.63, both P<0.05]. The incidences of preterm birth before 34 weeks and 28 weeks, chorioamnionitis, and preterm premature rupture of membrane were lower in the cerclage group than those in the conservative group [17.8% (8/45) vs 45.1% (23/51), χ2=8.16; 2.2% (1/45) vs 15.7% (8/51), Fisher' exact test; 8.9% (4/45) vs 25.5% (13/51), χ2=4.52; 15.6% (7/45) vs 33.3% (17/51), χ2=4.03; all P<0.05]. There were no statistically significant differences in the proportion of postpartum hemorrhage and live births between the two groups (both P>0.05). In the women with CL≤1.0 cm, the cerclage group had a greater gestational age at delivery [36.0 (34.8-37.3) weeks vs 34.9 (28.6-35.4) weeks, Z=－2.61, P=0.009], greater prolonged gestation [12.3 (9.7-13.9) weeks vs 7.3 (3.4-9.1) weeks, Z=－3.34, P=0.001], higher birthweight [2 430.0 (2 173.8-2 646.3) g vs 1 900.0 (1 372.5-2 435.0) g, Z=－3.06, P=0.002], lower incidence of adverse neonatal outcomes [16.7% (6/36) vs 36.7% (11/30), χ2=4.22, P=0.048] compared with the conservative group. Multivariate Logistic regression analysis showed that cerclage reduced the risks of preterm birth before 34 and 32 weeks [ aOR (95% CI)=0.083 (0.009-0.790) and 0.092 (0.009-0.939), both P<0.05]. However, cerclage did not reduce the risk of preterm birth in women with CL>1.5 cm or CL>1.0-≤1.5 cm (both P>0.05). Conclusion:Ultrasound- indicated cervical cerclage can reduce the risk of preterm birth before 34 and 32 weeks, prolong pregnancy, and improve perinatal outcomes in asymptomatic twin pregnancies with CL≤1.0 cm.

Objective:To explore the mediating effect of perceived professional benefits between the humanistic literacy and spiritual care competence among oncology nurses.Methods:From September to October 2022, convenience sampling was used to select 354 oncology nurses from 11 ClassⅢ Grade A hospitals in Sichuan Province, Guangdong Province, and Hubei Province as the research subject. A survey was conducted on oncology nurses using the General Information Questionnaire, Nurses' Perceived Professional Benefit Questionnaire, Nurses' Humanistic Literacy Scale, and the Chinese version of the Spiritual Care Competence Scale (SCCS) . Pearson correlation was used to analyze the relationship between nurses' humanistic literacy, perceived professional benefits, and spiritual care competence. AMOS 26.0 software was used to analyze mediating effects. A total of 354 questionnaires were distributed, and after excluding 7 unqualified questionnaires, 347 valid questionnaires were collected, with a valid response rate of 98.02%.Results:Among 347 oncology nurses, the score of the Chinese version of SCCS was (77.60±19.04) . The total score of the SCCS was positively correlated with the total scores of the Nurses' Humanistic Literacy Scale, the Nurses' Perceived Professional Benefit Questionnaire, and scores of all dimensions, with statistically significant differences ( P<0.01) . Bootstrap test showed that the mediating effect of perceived professional benefits among oncology nurses between humanistic literacy and spiritual care competence was 0.284 [95% CI (0.408, 0.860) ] , accounting for 50.90% of the total effect. Conclusions:The perceived professional benefits of oncology nurses play a partial mediating role between humanistic literacy and spiritual care competence. We should strengthen training on the humanistic literacy of oncology nurses, enhance their perceived professional benefits, form a virtuous cycle of employment, and thereby improve their spiritual care competence.

Objective:To study the protective effect and mechanism of paeoniflorin (pae) on myocardial injury in septic rats.Methods:Sprague-Dawley (SD) rats were randomly divided into 4 groups with 10 rats in each group. Rats were intraperitoneally injected with 1.4 ml normal saline and 1.4 ml 5% dimethyl sulfoxide (DMSO)solution independently in control group and DMSO group. Rats were intraperitoneally injected with 1.4 ml normal saline and 1.4 ml pae independently, then with 0.1 ml lipopolysaccharide (LPS) 1 hour later in sepsis group and pae group. Enzyme linked immunosorbent assay (ELISA) was used to detect serum cardiac troponin I (cTnI) levels and myocardial tissue tumor necrosis factor alpha (TNFα), interleukin(IL)-6, IL-1β, chemokine (C-X-C motif) ligand 1 (CXCL1), chemokine (C-X-C motif) ligand 2 (CXCL2), vascular cell adhesion molecule 1 (VCAM-1) levels. Evans blue (EB) method was used to detect the EB content of myocardial tissue. HE staining method was used to observe the pathological changes, real-time quantitative polymerase chain reaction (RT-qPCR) to detect mRNA expression levels of the above molecules, and Western-blot to detect vascular endothelium-cadherin (VE-cadherin), phosphorylated p38 mitogen-activated protein kinase (P-p38MAPK), phosphorylated Src protein (P-Src), Ras-Related C3 Botulinum Toxin Substrate 1 (Rac1) levels.Results:Compared with control group, cTnI level and the EB content in sepsis group increased significantly, and the myocardial inflammatory cell infiltration was obvious. The cTnI level and EB content in pae group were significantly reduced, and myocardial inflammatory cell infiltration was reduced [cTnI: (227.7±15.9)pg/ml vs. (312.9±17.9)pg/ml;EB: (13.2±2.3)μg/g vs. (23.8±2.9)μg/g; P<0.05]. Compared with control group, the levels of TNFα, IL-6, IL-1β, CXCL1, CXCL2, and VCAM-1 in sepsis group were increased. Compared with sepsis group, the above-mentioned molecular levels of pae group were significantly decreased [TNFα: (63.39±9.55)pg/ml vs. (126.54±19.17)pg/ml ;IL-6: (64.03±8.82)pg/ml vs. (85.60±9.52)pg/ml;IL-1β: (69.52±9.23)pg/ml vs. (130.45±15.10)pg/ml;CXCL1: (2 600.19±379.54)pg/ml vs. (4 903.89±533.42)pg/ml;CXCL2: (93.71±10.83)pg/ml vs. (127.24±13.92)pg/ml;VCAM-1: (112.22±13.49)pg/ml vs. (149.32±15.65)pg/ml, both P<0.05]. RT-qPCR results showed that the mRNA expressions of TNFα, IL-6, IL-1β, CXCL1, CXCL2 and VCAM-1 in the sepsis group were increased compared with the control group; Compared with sepsis group, the IL-6 mRNA (1.271±0.139 vs. 1.920±0.191, P<0.05), IL-1βmRNA (1.180±0.130 vs. 1.817±0.191, P<0.05), VCAM-1 mRNA (1.088±0.144 vs. 1.460±0.166, P<0.05) expression decreased significantly in the pae group. Compared with control group, the levels of P-p38MAPK and P-Src in sepsis group increased, and the level of VE-cadherin decreased. Compared with sepsis group, the levels of p38MAPK and P-p38MAPK in pae group were significantly decreased, and the level of VE-cadherin was increased (p38MAPK/β-actin: 1.125±0.078 vs. 1.520±0.164; P-p38MAPK protein: 1.639±0.133 vs. 2.112±0.222; both P<0.05). Conclusion:Paeoniflorin could improve the permeability of cardiac microvascular endothelium in sepsis rats and inhibit the secretion and expression of inflammation-related proteins and genes, which might be related to the inhibition of Src/VE-cadherin pathway by paeoniflorin.