Objective:To investigate the effectiveness and safety of low-dose oral misoprostol solution for cervical ripening in late gestation.Methods:This was a prospective cohort study including 396 primiparas with singleton pregnancy who received low-dose oral misoprostol solution for cervical ripening (oral group) in Peking University Third Hospital from March to October 2022. They were further allocated to receive oral misoprostol alone (OA group, n=167) or oral misoprostol in combination with oxytocin/amniotomy (OC group, n=229). Moreover, 218 cases who received vaginal misoprostol for cervical ripening (vaginal group) during the same period in 2021 were reviewed (a retrospective cohort). Among them, 77 were given vaginal misoprostol alone (VA group) and 141 received vaginal misoprostol in combination with oxytocin/amniotomy (VC group). The OA group and VA group (72 and 73 cases) as well as the OC group and VC group (108 and 103 cases) were matched using propensity scores. Basic clinical information, hospital stay, duration of labor induction, uterine hyperstimulation, rate of labor initiation, vaginal delivery rate, rate of delivery within 24 h, duration of labor, neonatal condition, adverse pregnancy outcomes, and other information were compared between different groups. All data were statistically analyzed using independent sample t test, analysis of variance, nonparametric test, Chi-square test, or Fisher's exact probability test. Logistic regression model was used to analyze the factors affecting the labor initiation and the failure of labor induction. Results:The average hospital stay, the duration from medication to labor initiation and the duration from medication to vaginal delivery were significantly shorter in the oral group than those in the vaginal group [(5.4±2.4) vs. (6.5±2.6) d, (34.2±24.1) vs. (38.9±25.7) h, (45.8±25.8) vs. (53.4±27.8) h; t=5.24, 2.10 and 3.39; all P<0.05]. The total labor initiation rate and vaginal delivery rate in the oral group were significantly higher than those in the vaginal group [92.9% (368/396) vs. 83.5% (182/218), 72.2% (286/396) vs. 60.1% (131/218); χ 2=13.43 and 9.50; both P<0.05]. The incidence of failed induction of labor, uterine hyperstimulation, fetal distress, and intrauterine infection in the oral group were lower than those in the vaginal group [2.0% (8/396) vs. 6.9% (15/218), 4.3% (17/396) vs. 17.9% (39/218), 8.8% (35/396) vs. 14.7% (32/218), 1.3% (5/396) vs. 3.7% (8/218); χ 2=9.21, 31.36, 4.93 and 3.93; all P<0.05]. The duration from medication to labor initiation and to vaginal delivery in the OA group were higher than those in the VA group [(25.8±17.0) vs. (17.4±10.8) h, (37.2±18.8) vs. (29.7±13.5) h; t=3.49 and 2.74; both P<0.05]. There were no significant differences in the labor initiation rate, vaginal delivery rate, rate of delivery within 24 h or the incidence of failed induction of labor between the OA and VA groups (all P>0.05). Women in the VA group were more likely to develop uterine hyperstimulation than those in the OA group [19.2% (14/73) vs. 4.2% (3/72), χ2=7.89, P=0.005]. There were no significant differences in the duration from medication to labor initiation or to vaginal delivery between the VC and OC groups (both P>0.05), but the duration were significantly longer than those in the corresponding medication alone group (VC vs. VA groups: (49.7±24.6) vs. (17.4±10.8) h and (61.6±25.7) vs. (29.7±13.5) h, t=5.31 and 5.13, both P<0.05; OC vs. OA groups: (45.3±26.6) vs. (25.8±17.0) h and (56.1±27.2) vs. (37.2±18.8) h, t=10.35 and 9.78, both P<0.05]. The labor initiation rate, vaginal delivery rate and rate of delivery within 24 h in the OC group were higher than those in the VC group [88.9% (96/108) vs. 77% (87/113), 63.0% (68/108) vs. 47.8% (54/113), 10.3% (7/108) vs. 0.0% (0/113); χ 2=5.49, 5.14 and 7.56; all P<0.05]. The incidence of uterine hyperstimulation in the OC group was 4.6% (5/108), which was lower than that in the VC group [18.6% (21/113), χ 2=10.37, P=0.001]. Logistic regression analysis showed that oral misoprostol and gestational age were positively correlated with labor initiation [ OR (95% CI): 2.18 (1.24-3.90) and 1.43 (1.14-1.79)], while maternal age was negatively correlated with labor initiation [ OR (95% CI): 0.90 (0.82-0.98)]. Moreover, failed induction of labor was negatively correlated with oral misoprostol [ OR (95% CI): 0.37 (0.14-0.91)], but positively correlated with maternal age [ OR (95% CI): 1.21 (1.05-1.40)]. Conclusions:Oral administration of low-dose misoprostol solution is as effective as vaginal misoprostol in promoting cervical ripening. Besides, it can shorten the average hospital stay and reduce the incidence of uterine hyperstimulation, suggesting that low-dose oral misoprostol solution is relatively safer and can be used to promote cervical ripening in late gestation.

Objective To analyze the current status of dyslipidemia among employees in a petrochemical enterprise and its influencing factors. Methods A total of 1 636 employees from a petrochemical enterprise were selected as the research subjects by the judgment sampling method. Peripheral venous blood was collected from the research subjects to detect total cholesterol, triglyceride, high-density lipoprotein cholesterol (HDL-C) and low- density lipoprotein cholesterol (LDL-C) in serum. The Effort-Reward Imbalance (ERI) Questionnaire was used to investigate occupational stress in the ERI model. Results The detection rate of dyslipidemia among the research subjects was 52.7%. The detection rates of abnormal total cholesterol, triglyceride, LDL-C, and HDL-C were 35.7%, 31.4%, 24.3%, and 10.0%, respectively. The detection rate of high occupational stress among the research subjects was 26.3%. The result of multivariate logistic regression analysis showed that the risks of dyslipidemia in overweight and obese employees were higher than that of normal body mass [ odds ratio (OR) and 95% confidence interval (CI) were 2.111 (1.692-2.634) and 2.346 (1.591-3.458), both P<0.01]. The risk of dyslipidemia in lean body mass employees was lower than those with normal body mass [OR (95%CI) was 0.130 (0.030-0.564), P<0.05]. The risk of dyslipidemia in smokers was higher than that in non-smokers [OR (95%CI) was 1.462 (1.124-1.902), P<0.01]. Employees with 20-30 years and ≥ 30 years of service had higher risks of dyslipidemia than those with <10 years of service [OR (95%CI) were 1.411 (1.038-1.919) and 1.869 (1.202-2.906), respectively, both P<0.05]. The risk of dyslipidemia among employees with high effort level of occupational stress in ERI model was higher than those with low effort level [OR (95%CI) was 1.351(1.045-1.745), P<0.05]. Conclusion Dyslipidemia prevalence is relatively high among the petrochemical enterprise employees. Overweight, obesity, smoking, long service years, and occupational stress in ERI model are influencing factors of dyslipidemia. To prevent dyslipidemia, it is necessary to strengthen blood lipid monitoring and lifestyle intervention in personnel with overweight, obesity, smoking, long service years, and occupational stress in ERI model.

Objective:To select human chronic myeloid leukemia (CML) cell line K562 as the experimental object, and use lentivirus mediated CRISPR/Cas9 gene editing technology to construct a stable CML cell line K562/TCRP1-KO that knocks out the tongue cancer resistance related protein 1 (TCRP1) gene; and through functional tests such as cell proliferation, apoptosis, and drug sensitivity, compare the phenotypic differences between K562/TCRP1-KO and control cells (K562/cas9-CTL), and preliminarily explore the possible mechanism of TCRP1 gene involvement in the pathogenesis of CML.Methods:The small guide RNA (sgRNA) targeting TCRP1 was designed at a specific location. After annealing, the oligonucleotide fragments were recombined with the linearized Cas9 expression vector, and the lentivirus packaging system was transfected into 293T cells. The purified virus was collected and infected with K562 cells. Positive polyclons were screened for puromycin pressure, and monoclonal K562/TCRP1-KO was further screened by limited dilution method. Stable cell lines were successfully knocked out by sanger sequencing and Western blot detection; Simultaneously, K562 cells transfected with lentiCRISPR vector were constructed as control cell lines (K562/cas9-CTL); Using cell counting method, cell counting kit 8 (CCK8) method, imatinib (IM) gradient dilution method, and flow cytometry cell proliferation, drug sensitivity, and apoptosis analysis were performed on K562/TCRP1-KO and K562/cas9-CTL, respectively.Results:The sgRNA-Cas9 recombinant plasmid vector for TCRP1 knockout was successfully constructed, and after transfection into 293T cells, TCRP1 knockout monoclonal cell lines were successfully screened using limited dilution method. Compared with K562/cas9-CTL cells, the proliferation ability of K562/TCRP1-KO cells was significantly reduced, IM drug sensitivity was significantly enhanced, and the process of cell apoptosis was significantly accelerated (all P<0.05). Conclusions:A CML cell line with TCRP1 knockout was successfully constructed using CRISPR/Cas9. TCRP1 may act as a cancer related gene to affect the proliferation, IM resistance, and apoptosis process of CML cells.

Objective:To explore the technical feasibility of CT feature tracking (CT-FT) technique in evaluating left ventricular myocardial strain and evaluate the change of myocardial strain in patients with coronary heart disease.Methods:Eighty-one patients with coronary heart disease (lesion group) and 33 patients with normal coronary artery (control group) matched with age and sex were collected retrospectively from the Second Affiliated Hospital of Nanchang University from April 2019 to October 2020. The lesion group was first divided into single vessel stenosis group (42 cases) and multi vessel stenosis group (39 cases) according to the number of coronary artery stenosis branches, and the global myocardial strains of the left ventricle between the groups were analyzed. Lesion site included the left anterior descending branch (LAD), right coronary artery (RCA) and left circumflex branch (LCX), respectively. According to the degree of vascular stenosis, the lesion groups were divided into normal group, mild stenosis group, moderate stenosis group and severe stenosis group. The segmental myocardial strains of the branch segment of LAD, RCA or LCX were analyzed between groups. All CCTA examinations were performed with retrospective electrocardiogram gating. CVI 42 cardiac postprocessing software was used to obtain myocardial strain parameters, including global peak longitudinal strain (GPLS), global peak circumferential strain (GPCS), global peak radial strain (GPRS), and the segmental myocardial strains of the branch segment of LAD, RCA or LCX. The segmental myocardial strains included the peak longitudinal strain (PLS), peak circumferential strain (PCS) and peak radial strain (PRS). One way ANOVA or Kruskal Wallis H test were used for multi group analysis. Results:With the increased number of coronary artery stenosis branches, the absolute value of GPLS gradually decreased. The GPLS of the control group, single vessel stenosis group and multi vessel stenosis group were -14.1%±2.7%, -11.5%±2.3% and -8.8%±2.0%, respectively. The difference of GPLS between the 3 groups or any 2 groups was statistically significant (all P<0.001). The absolute values of GPRS and GPRS in multi vessel stenosis group were significantly lower than those in control group and single vessel stenosis group (all P<0.001). There was no significant difference in GPRS or GPRS between single vessel stenosis group and control group ( P=0.083, 0.118). And there were significant differences in the segmental myocardial strains of the branch segment of LAD, RCA or LCX among 3 groups ( P<0.001). In severe stenosis group, the absolute values of PRS, PCS and PLS in LAD, RCA or LCX were significantly lower than those in moderate stenosis group, mild stenosis group and normal group (all P<0.05). In the moderate stenosis group, the absolute value of PLS in each branch segment was lower than that of the mild stenosis and normal group (all P<0.05), and there was no significant difference in any 2 other myocardial strain parameters of each branch (all P>0.05). Conclusions:CT-FT technique was feasible to evaluate left ventricular myocardial function. With the increased number or degree of coronary artery stenosis, the global and segmental myocardial strain parameters of left ventricle gradually decreased, and the longitudinal strain was more sensitive.

Objective:To investigate the induction mechanism of cisplatin on hepatoma senescence.Methods:2 μg/ml cisplatin was applied to affect hepatocellular carcinoma cell line HepG2. Cell proliferation of tumor cells was detected by MTS method. The cell cycle was detected by flow cytometry. The RT-PCR and Western blot were used to detect the expression of senescence regulation genes, p19 and p21. The expression of p21 was detected by cell immunofluorescence. Nude mouse model of human hepatocellular carcinoma was intraperitoneally injected with specific drug to measure the growth, metastasis of tomor and expression of p21 protein.Results:Cell proliferation rate in cisplatin group was lower than that of the control group( t=8.958, P<0.05). Flow cytometry showed the percentage of G 2 phase were19.90%±0.42%, 12.57%±0.84% in the cisplatin and control group, respectively. Cells were arrested in G 2 phase ( t=14.415, P<0.05). In the cisplatin group and control group, the relative expression of p19 were(2.23±0.05), (1.00±0.02); the relative expression of p21 were (3.26±0.11), (1.00±0.02). The expression of p19 and p21 increased(respectively t=43.750, 56.541, all P<0.05). The tumor size of cisplatin group was smaller than that of the control group, and the expression level of p21 protein was higher than that of the control group ( P<0.05). Conclusion:Cisplatin can induce senescence of hepatocellular carcinoma cells through the p19/p21 pathway.

OBJECTIVE: To explore the influencing factors of depressive symptom of employees in a mould-producing enterprises using two occupational stress models. METHODS: A total of 457 employees in a mould-producing enterprise were selected as study subjects using cluster sampling method. The Center for Epidemiological Study-Depression Scale, the Chinese version of Job Demand Content Questionnaire and the Effort-Reward Imbalance Questionnaire were used to investigate the level of depressive symptom and occupational stress by the job demand control(JDC) model and effort reward imbalance(ERI) model. RESULTS: Among the 457 employees, the median score of depressive symptom was 11.00, the detection rate of depressive symptom in the subjects was 23.4%(107/457). The incidence of occupational stress by the JDC and ERI models was 78.3%(358/457) and 62.6%(286/457), respectively. The rate of depressive symptom was statistically higher in the high occupational stress group than that of the low occupational stress group by the ERI model(26.6% vs 18.1%, P<0.05). The multivariate logistic regression analysis showed that both marital status and monthly income were influencing factors of depressive symptom by the JDC model(P<0.05). The marital status, monthly income and occupational stress were influencing factors of depressive symptom by the ERI model(P<0.05). The risk of depressive symptom was statistically higher in the high occupational stress group than that of the low occupational stress group(P<0.05). CONCLUSION: Employees in mould-producing enterprise have some depressive symptom. The marital status, monthly income and occupational stress by the ERI model are the main influencing factors of depressive symptom.

OBJECTIVE: To explore the influencing factors of occupational stress from occupational hazards in employees of a power grid enterprise. METHODS: A total of 972 employees from 3 substations and 1 power dispatch center of a power grid enterprise were selected as research subjects by the cluster sampling method. The Chinese version of the Job Content Questionnaire was used to evaluate the occupational stress using the job demand control(JDC) model. The influence of occupational hazards on occupational stress was analyzed. RESULTS: The median, the 25 th and 75 th percentile scores [M(P_(25), P_(75))] of the 972 research subjects on job demand, job control, and social support dimensions of JDC model occupational stress were 14(12, 15), 25(23, 26), 24(23, 24), respectively. The M(P_(25), P_(75)) of the demand/control(D/C) ratio was 0.99(0.89, 1.13). The incidence of occupational stress was 48.4%(470/972) by the JDC model. The job demand dimension scores, D/C ratios, and incidence of occupational stress by JDC model were higher in employees exposed to electromagnetic radiation, high temperature, high altitude, and visual display terminal(VDT) than in those employees not exposed to the above factors(all P<0.05). The results of multivariate logistic regression analysis showed that the risk of occupational stress increased in those employees exposed to high temperature, high altitude and VDT(all P<0.05) after excluding the influence of confounding factors such as age, length of service, monthly income and exercise. The odds ratio and 95% confidence intervals were 1.91(1.43-2.54) and 1.67(1.26-2.21), respectively. CONCLUSION: The level of occupational stress among employees in power grid enterprise is relatively high by JDC model. High-temperature, high-altitude and VDT operation are the main risk factors of occupational stress by JDC model.

PURPOSE: To investigate the clinical value of serum miR-221-3p and miR-122-5p expression levels in the diagnosis and prognosis of gastric cancer. MATERIALS AND METHODS: Serum samples from 141 gastric cancer cases (gastric cancer group), 110 gastric polyps (gastric polyp group), and 75 healthy people (healthy control) were used to detect miR-221-3p and miR-122-5p expression using real-time reverse transcription polymerase chain reaction. RESULTS: Serum miR-221-3p expression was significantly higher in the gastric cancer group than in the gastric polyp group, and it was significantly lower than that before operation. The miR-221-3p expression was significantly higher in the death group than in the survival group. The proliferation and migration ability significantly increased and the apoptosis rate significantly decreased by miR-221-3p transfection in gastric cancer cells. In contrast, the function of miR-122-5p in gastric cancer cells was opposite of miR-221-3p. Serum miR-221-3p expression was negatively correlated with that of miR-122-5p in gastric cancer. Serum miR-221-3p and miR-122-5p expressions were significantly correlated with the degree of differentiation, tumor, node, metastasis stage, lymph node metastasis, and invasion depth. miR-221-3p and miR-122-5p expression levels were independent prognostic factors for postoperative gastric cancer. In the diagnosis and predicting prognosis of gastric cancer, receiver operating characteristic analysis revealed that the area under curve of combined detection of serum miR-221-3p and miR-122-5p expression had a greater diagnostic effect than either single maker. CONCLUSIONS: The miR-221-3p and miR-122-5p are involved in the development of gastric cancer, and they have important clinical values in gastric cancer diagnosis and prognosis.
Apoptosis ; Area Under Curve ; Diagnosis ; Lymph Nodes ; MicroRNAs ; Neoplasm Metastasis ; Polymerase Chain Reaction ; Polyps ; Prognosis ; Real-Time Polymerase Chain Reaction ; Reverse Transcription ; ROC Curve ; Stomach Neoplasms ; Transfection

OBJECTIVE: To discuss the applicability of 3 risk assessment methods to evaluate the occupational health risk of benzene and its analogues in the workplace of an aircraft maintenance enterprise. METHODS: The workshops of compound material,structural and electromechanical involved in exposure of benzene and its analogues in an aircraft maintenance enterprise were chosen as study subjects. The optimal indicator system of risk assessment on occupational chemical hazards( hereinafter referred to as“optimal indicator system”),the Singapore semi-quantitative risk assessment model and risk index method were used to classify the benzene hazards of 5 operating posts in 3 workshops. The risk stratification results of the 3 assessment methods were compared. RESULTS: The results of optimal indicator system for benzene risk rating was mild risk in all workplaces. The risk classifications for toluene and xylene were light risk. The risk classifications of Singapore semi-quantitative risk assessment model for benzene,toluene and xylene were all low risk in all workplaces. The risk classifications of risk index method for benzene were all moderate risk in all workplaces. The risk classifications for toluene were harmless in all workplaces. The risk classifications for xylene were mild risk in all workplaces. CONCLUSION: There are differences among the evaluation results of the 3 risk assessment methods. The optimal indicator system could be more suitable for occupational health assessment of benzene and its analogues in aircraft maintenance industries.

Objective To evaluate it' s prognosis according to the follow-up statistics of coronary reimplantation of anomalous left coronary artery originating from the pulmonary artery (ALCAPA).Methods Analyze the preoperative,peri-operative and postoperative data of 20 ALCAPA patients having undergone coronary artery reimplantation.Results After coronary reimplantation,patient' s cardiothoracic ratio was obviously decreased,the degree of myocardial ischemia was improved according to electrocardiogram,the left ventricular ejection fraction and fractional shortening showed a trend of rise,mostof the patients recover in 6 months to 1 year after coronary artery reimplantation.Left ventricular end-diastolic volume index over time gradually returned to normal,mitral regurgitation gradually.improved.Conclusion ALCAPA is rare and fatal,therefore it should be diagnosed and treated as early as possible.It is also significant to avoid missed diagnosis and misdiagnosis.After coronary reimplantation,cardiac function can be gradually restored with low mortality and good prognosis result.The left ventricularejection fraction of most patients recovers to the normal standard in six months to one year' s time.