Objective To retrospectively analyze of factors influencing early preterm birth(EPB)and late preterm birth(LPB)in pregnancy women with placenta previa complicated by placenta accreta spectrum disorders(PAS),and assess maternal and infant outcomes.Methods We included 590 cases of pregnancy women with placenta previa complicated by PAS who underwent cesarean sections at five hospitals in Wuhan and Xianning cities between January 2018 and June 2021.These patients were divided into three groups based on delivery gesta-tional age:EPB,LPB,and term birth(TB).A multiple logistic regression model was employed to analyze the risk factors associated with EPB and LPB.Additionally,differences in early maternal and infant outcomes among these groups were examined.Results Among 590 pregnancy women with placenta previa complicated by PAS,the proportions of EPB and LPB were 9.7%and 54.4%.The use of uterine contraction inhibitors prior to cesarean section,vaginal bleeding,and previous cesarean sections history were identified as risk factors for both EPB and LPB.The proportion of severe postpartum hemorrhage was comparable between the EPB group and the LPB group;however,the incidence of neonatal asphyxia,low birth weight infants,and the rate of newborns transferred to the Neonatal Intensive Care Unit(NICU)within 24 hours after cesarean delivery were significantly higher in the EPB group compared to the LPB group.Conclusions Placenta previa complicated by PAS predominantly leads to LPB.The history of prior cesarean sections,uterine contractions,and vaginal bleeding prior to cesarean section,are sig-nificantly associated with both EPB and LPB.During the perinatal period,efforts should be made to extend gesta-tional weeks under close monitoring to minimize the incidence of premature births and thereby improve early mater-nal and infant outcomes.

Objective: To study the buccolingual inclination of posterior premolars and molars and the curve of Wilson in patients with different sagittal skeletal patterns, to explore the compensation mechanism of horizontal inclination of posterior teeth in patients with different sagittal skeletal patterns and to provide a reference for the control of posterior tooth inclination in the treatment of bone malocclusion. Methods: This study was reviewed and approved by the Ethics Committee, and informed consent was obtained from the patients. Ninety CBCT scans of adults and ninety scans of adolescents before orthodontic treatment were evaluated in this cross-sectional study. There were 30 skeletal Class I, Class Ⅱ, and Class Ⅲ patients in the adult group and adolescent group. The inclination angles of posterior teeth and the curve of Wilson of first and second molars were measured, and data were analyzed between adolescents and adults with different sagittal skeletal patterns. Results : Compared with skeletal Class Ⅰ adult patients, the upper posterior molar inclination of skeletal Class Ⅱ patients was significantly lower, and the lower posterior molar inclination was significantly higher. Compared with skeletal ClassⅠ adult patients, the upper posterior molar inclination of skeletal Class Ⅲ adult patients was higher, and the lower posterior molar inclination was significantly lower. The Wilson curve of the second molar in skeletal Class Ⅱ adult patients was significantly higher than that in the other groups. Compared with skeletal ClassⅠ adolescent patients, skeletal Class Ⅲ adolescent patients had a significantly higher upper posterior molar inclination; however, no difference was found between the inclination of the posterior teeth between skeletal Class Ⅰ, Class Ⅱ and Class Ⅲ adolescent patients. Comparing adolescent and adult samples, in skeletal Class Ⅱ patients, adults showed more lingual inclination than adolescents in the upper posterior teeth and less lingual inclination in the lower posterior teeth except for the mandibular first molar. Comparing adolescent and adult samples, in skeletal Class Ⅲ patients, adults showed more lingual inclination than adolescents in the lower posterior teeth except for the mandibular second molars and showed no difference in the upper posterior teeth. Conclusions The inclination of the posterior teeth and the curve of Wilson show significant differences between the three sagittal skeletal patterns. Compared with those of skeletal Class Ⅰ patients, the posterior teeth of skeletal Class Ⅱ patients show more lingual inclination in the upper arch and less lingual inclination in the lower arch. Meanwhile, posterior teeth of skeletal Class Ⅲ patients show more lingual inclination in the lower arch and maintain the inclination in the upper arch.

Lateral epicondylitis is a common clinical disease with characteristics of lateral elbow pain, insidious onset and easy recurrence, which can cause forearm pain and decreased wrist strength, seriously affecting patients′ daily life and work. Although there are various treatment methods for lateral epicondylitis with different effects, standard treatments are still lacking nowadays. Platelet-rich plasma (PRP) has good effects on bone and tendon repair, and is now widely used in the treatment of lateral epicondylitis. However, there is a lack of a unified understanding of the technology and specifications of PRP in the treatment of lateral epicondylitis. Therefore, the Sports Medicine Branch of the Chinese Medical Association and Physical Medicine and Rehabilitation Branch of the Chinese Medical Association organized experts in the fields of sports medicine and rehabilitation medicine in China to formulate the "clinical expert consensus on platelet-rich plasma treatment for lateral epicondylitis (2022 version)", and proposed suggestions based on evidence-based medicine mainly from the concept, epidemiology and pathophysiology of lateral epicondylitis, symptoms, signs and imaging manifestations of lateral epicondylitis, PRP concept and application component requirements, quality control of PRP preparation technology, indications and contraindications of PRP in the treatment of lateral epicondylitis, PRP injection in the treatment of lateral epicondylitis, application of PRP in the operation of lateral epicondylitis, related problems after PRP treatment of lateral epicondylitis, evaluation of the results after PRP treatment of lateral epicondylitis, and health and economic evaluation of PRP treatment of lateral epicondylitis, so as to provide guidance for clinical diagnosis and treatment.

OBJECTIVE：To establish a method for the determination of plasma protein binding rate of rosmarinic acid ，caffeic acid and chlorogenic acid from Glechoma longituba . METHODS ：UHPLC method combined with ultrafiltration method was adopted to determine the plasma protein binding rate of rosmarinic acid ，caffeic acid and chlorogenic acid from G. longituba in the plasma of New Zealand rabbits. The determination was performed on a Phenomenex Luna ® C18 column with mobile phase consisted of acetonitrile （A）-0.1％ formic acid solution （B）（gradient elution ）at the flow rate of 0.5 mL/min. The column temperature was set at 45 ℃，and the detection wavelength was 327 nm. The sample size was 3 μL. RESULTS：At low ，medium and high concentrations，the plasma binding rates of rosmarinic acid were （97.78 ± 1.67）％ ，（94.32 ± 1.42）％ ，（95.12 ± 1.51）％ ， respectively（n＝3）；those of caffeic acid were （90.12±2.33）％，（89.53±1.98）％，（90.23±1.56）％，respectively（n＝3）；those of chlorogenic acid were （63.23 ± 2.12）％ ，（67.87 ± 1.06）％ ，（62.34 ± 1.34）％ ，respectively （n＝3）. CONCLUSIONS ： Established method is easy to operate and shorter time for analysis. It can be used to determine the plasma protein binding rate of rosmarinic acid ，caffeic acid and chlorogenic acid in G. longituba .

Objective:To investigate the expression of miRNA-4766-5p (miR-4766-5p) in ovarian cancer tissues, the effect of miR-4766-5p on the proliferation and invasion of ovarian cancer cells in vitro and its related mechanism.Methods:The cancerous tissues and adjacent tissues of 32 patients with ovarian cancer who underwent surgical treatment in the Central Hospital of Wuhan, Tongji Medical College, Huazhong University of Science and Technology from February 2019 to December 2020 were selected, as well as the ovarian cancer cell lines (A2780, OC3, SKOV-3. HO-8910, and OVCAR-3) and normal ovarian epithelial cell line IOSE80 were selected for subsequent experiments. Real-time fluorescent quantitative polymerase chain reaction (qRT-PCR) was used to detect the relative expression of miR-4766-5p in each cell line and ovarian cancer tissues. The cell line with the lowest relative expression of miR-4766-5p was taken as the experimental subject, and the negative control plasmid (control group) and the plasmid expressing miR-4766-5p (miR-4766-5p group) were transfected respectively into the ovarian cancer cells. CCK-8 method and Transwell experiment were used to detect the effect of overexpression of miR-4766-5p on the proliferation and invasion ability of the selected cells. PITA and starBase V2.0 softwares were used to predict the target genes of miR-4766-5p, and the dual luciferase reporter gene method was used for verification. qRT-PCR and Western blot were used to detect the effect of overexpression of miR-4766-5p on target gene expression of the selected cell lines.Results:The relative expressions of miR-4766-5p in ovarian cancer tissues and adjacent tissues were 1.06±0.17 and 5.25±0.70, respectively, and the difference was statistically significant ( t = 5.86, P < 0.01). Compared with IOSE80 cells, the relative expression of miR-4766-5p in all ovarian cancer cell lines decreased (all P < 0.01), and the relative expression of miR-4766-5p in OC3 cells was the lowest, so this cell line was used for subsequent experiments. The result of CCK-8 method showed that the absorbances of OC3 cells in the miR-4766-5p group were lower than those in the control group after 1 d, 2 d and 3 d of cell culture (all P < 0.05). The result of Transwell experiment showed that the number of penetrating cells in OC3 cells of the miR-4766-5p group and the control group were 25±6 and 86±11, respectively, and the difference was statistically significant ( t = 4.77, P < 0.01). PITA and starBase V2.0 softwares predicted that miR-4766-5p may have binding sites with microtubule unstable protein 1 (STMN1) mRNA; the result of dual luciferase reporter gene showed that the target gene of miR-4766-5p may be STMN1. The relative expression of STMN1 mRNA in OC3 cells of the miR-4766-5p group and the control group were 0.28±0.05 and 1.00±0.05, respectively, and the difference was statistically significant ( t = 10.47, P < 0.01). Compared the control group, the expression of STMN1 protein in the miR-4766-5p group decreased, the expression of epithelial cell phenotype protein β-catenin increased, the expression of mesenchymal cell phenotype protein Snail decreased, and the expressions of cyclin CDK2 and cyclin E decreased. Conclusion:miR-4766-5p is under-expressed in ovarian cancer tissues and ovarian cancer cell lines, and miR-4766-5p may inhibit the proliferation and invasion of ovarian cancer cells by down-regulating the expression of its target gene STMN1.

Objective: To investigate the expression of microRNA-380-5p (miR-380-5p) in cervical cancer tissues and cell lines, and to explore the mechanism of miR-380-5p inhibiting the proliferation and migration of cervical cancer cells. Methods: 16 pairs of cervical cancerous tissues and corresponding para-cancerous tissues were collected from the Department of Obstetrics and Gynecology, the Affiliated Wuhan Central Hospital of Tongji Medical College from December 2016 to July 2017; in addition, cervical cancer cell lines (HCC94, C33A, Hela, SiHa) and human cervical epithelial immortalized H8 cells were also collected for this study. The expression of miR-380-5p in above mentioned tissues and cell lines was detected by Real-time quantitative polymerase chain reaction (qPCR). miR380-5p mimic (experimental group) and miR-NC (negative control group) were transiently transfected into C33A cells by lipofection, and qPCR was used to detect the expression of miR-380-5p in the transfected cells. Cell proliferation and migration were evaluated by cell counting kit (CCK-8) and Transwell assay. Bioinformatics software TargetScan predicted the downstream genes of miR-380-5p, and dual luciferase reporter assay was used to verify the binding of miR-380-5p to the downstream gene RHOA (Ras homolog gene family member A). qPCR and Western blotting were used to detect the expression of miR-380-5p downstream gene-RHOA. Results: The expression level of miR-380-5p in cervical cancer tissues and cell lines was significantly lower than that in para-cancerous tissues and normal cervical epithelial H8 cells (P<0.01); and the expression in C33A cells was the lowest (P<0.01). Compared with the negative control group, the miR-380-5p mimic transfection singnificantly inhibited the proliferation (P<0.05) and migration ability of C33A cells (P<0.01), and down-regulated protein expressions of RHOA, ROCK1, ROCK2, CDK2 and N-cadherin (all P<0.01). Bioinformatics software predicted that RHOA may be a downstream gene of miR-380-5p, and dual luciferase reporter assay proved the specific binding of miR-380-5p to the 3'UTR of RHOA (P<0.01). miR-380-5p could significantly down-regulate RHOA gene expression (P< 0.01). Conclusion: miR-380-5p is low-expressed in cervical cancer cell lines. Over-expression of miR-380-5p may inhibit the proliferation and migration of cervical cancer C33Acells by down-regulating the expression of RHOAgene and its downstream proteins.

Objective：To investigate the effect of long-chain non-coding RNATTTY10 (lncRNATTTY10) on the migration and invasion of cervical cancer cells, and to explore its regulatory effect on miR-490-3p and HMGB1 (high mobility group box 1) signaling pathways. Methods: Fourteen paris of cervical cancer tissues and corresponding paracancerous tissues resected at the Department of Obstetrics and Gynecology,Affiliated Wuhan Central Hospital of Tongji Medical College fromAugust 2013 to December 2014 were collected for this study. The expression of TTTY10 in cervical cancer tissue and different cervical cancer cell lines were detected by qPCR. Plasmids encoding TTTY10-siRNA or empty plasmids were transfected into cervical cancer CasKicells, and the transfection efficiency was detected by qPCR. Transwell migration assay and Transwell invasion assay were used to detect the migration and invasion abilities of cervical cancer cells after TTTY10 silencing. qPCR was used to detect the expression of miR-490-3p and HMGB1 mRNA after TTTY10 silencing. Dual luciferase reporter assay validated the interaction between miR-490-3p and HMGB1. Western blotting was used to detect the expression of HMGB1 signaling pathway related proteins after TTTY10 silencing. Results: The expression of TTTY10 in cervical cancer tissues was significantly higher than that in paracancerous tissues (P<0.01), the expression of TTTY10 in cervical cancer cell lines was significantly higher than that in cervical epithelial cells (P<0.01). TTTY10-siRNAplasmids could efficiently transfectCasKicells to knockdown TTTY10 expression (P<0.01). Silencing of TTTY10 inhibited the migration and invasion of cervical cancer CasKi cells (P<0.05), promoted the expression of miR-490-3p (P<0.01) and inhibited the expression of HMGB1 mRNAin cervical cancer (P<0.05 or P<0.01). miR-490-3p could specifically bind to the 3'-UTR of HMGB1 mRNA(P<0.01). HMGB1 signaling pathway related proteins were down-regulated after TTTY10 silencing. Conclusion: TTTY10 can target regulate the expression of miR-490-3p and affect the migration and invasion ability of cervical cancer CasKi cells through the HMGB1 signaling pathway; TTTY10 can be used as a diagnostic marker and potential treatment target of cervical cancer.

Objective To investigate the effect of quinone oxidoreductase 1 (NQO1) and quinone oxidoreductase 2 (NQO2) expression in the prognosis of ovarian carcinoma.Methods The two online databases were used to perform the online analysis on the NQO1 and NQO2 mRNA levels and prognosis of ovarian cancer patients,1 306 cases of ovarian cancer were performed the Kaplan-Meier analysis by using the KaplanMeier plotter (K-M plotter);578 cases of ovarian cancer in the TCGA database were performed the univariate COX regression survival analysis.Results The K-M plotter analysis showed that the NQO1 expression level had no obvious correlation with the prognosis of ovarian cancer (P>0.05),the higher the NQO2 level,the better the prognosis (HR=0.83,P=0.006 2).The COX regression survival analysis showed that the NQO1 expression level had no obvious correlation with the prognosis of ovarian cancer(P>0.05),the higher the NQO2 level,the better the prognosis (P=0.038 29).Conclusion NQO2 expression level has no obvious correlation with the prognosis of ovarian cancer,moreover the higher the NQO2 expression level,the better the clinical prognosis of ovarian cancer.

BACKGROUND:The umbilical cord blood is rich of mesenchymal stem cells, which can be used as a new source of seed cells in tissue engineering. OBJECTIVE:To compare two methods for culturing, expanding and purifying the mesenchymal stem cells in vitro isolated from the human umbilical cord blood. METHODS:The ful-term birth cord blood of 40 cases was col ected under sterile conditions with heparin anticoagulation. Ficol density gradient centrifugation was used to isolate the mononuclear cells from the umbilical cord blood. The cases were randomly divided into two groups according to the different culture media. Twenty cases of umbilical cord blood were cultured in MesenGro human mesenchymal stem cells culture medium (group A), and the remaining 20 cases of umbilical cord blood were cultured in Dulbecco’s modified Eagle’s medium (group B). The occurrence time of fusiform mesenchymal stem cells and cell colony, culture time and the number of primary cells in the two groups were compared. Cells which grew well were selected to detect the surface markers by flow cytometry. RESULTS AND CONCLUSION: The mean occurrence time of fusiform mesenchymal stem cells and cell colony, culture time and number of primary cells in group A were better than those in group B (P < 0.01). The strong expression of the surface markers of mesenchymal stem cells (CD73 and CD105) was found by flow cytometry, of which the positive rate was 99.1%. No expression of the surface markers of hematopoietic stem cells (CD45 and CD34) was seen, of which the negative rate was 99.3%. The number, morphology, growth rate and culture time of umbilical cord blood mesenchymal stem cells cultured in MesenGro human mesenchymal stem cells culture medium were better than those cultured in Dulbecco’s modified Eagle’s medium. Cells cultured in MesenGro human mesenchymal stem cell culture medium can better express surface markers of mesenchymal stem cells.

Objective:To explore the effect of tumor necrosis factor-like weak inducer of apoptosis (TWEAK) on generating chemokines in rat articular chondrocytes cultured in vitro ,and to understand its role in the pathogenesis of OA .Methods :Rat articular chondrocytes were cultured in vitro .The cells of experimental group were induced by 250 ng/mL TWEAK ,while the cells of the control group were not .Levels of chemokines interleukin-8(IL-8) ,monocyte chemotactic protein 1(MCP-1) ,regu-lated upon activation normal T cell expressed and secreted factor (RANTES) ,macrophage inflammatory protein 2(MIP-2) in the nutrient solution of the two groups were detected at 24 ,48 and 72 h .Results:After the induction of TWEAK ,the levels of RANTES in the supernatant of rat articular chondrocytes at 24 ,48 and 72 h were all significantly higher than those in the con-trol groups ,respectively (all P<0 .05) ,and the contents of RANTES were positively correlated with the treatment time of TWEAK (P<0 .05) .The IL-8 and MCP-1 levels in the supernatant of rat articular chondrocytes at 48 and 72 h were signifi-cantly higher than those in the control groups (both P< 0 .05) ,but they had no correlations with the treatment time of TWEAK (P>0 .05) .The MIP-2 levels of the rat articular chondrocytes supernatant at 48 and 72 h were significantly lower than those in the control groups (P<0 .05) ,and the contents of MIP2 were positively correlated with the treatment time of TWEAK (P<0 .05) .Conclusions :TWEAK can induce rat chondrocytes in vitro to generate chemokines (IL-8 ,MCP-1 ,RAN-T ES ) ,so that it is involved in the occurance of OA .