Alternative splicing (AS) is a crucial process that produces functionally distinct proteins from a single gene, depending on the developmental or physiological state of cells in multicellular organisms. It plays a significant role in cellular proliferation, survival, and differentiation, including embryonic development, spermatogenesis, and a broad spectrum of diseases. However, the precise involvement of AS in embryo implantation is still unclear. In this review, we summarize the potential roles of AS in regulating mesenchymal-epithelial transitions during embryo implantation, specifically in epithelium regeneration and decidualization initiation via the mesenchymal-epithelial transformation process. Overall, this review emphasizes the impact of AS and splicing variants on embryo implantation and offers novel insights into the potential application of alternative splicing in the treatment of female infertility.

Alternative splicing (AS) is a crucial process that produces functionally distinct proteins from a single gene, depending on the developmental or physiological state of cells in multicellular organisms. It plays a significant role in cellular proliferation, survival, and differentiation, including embryonic development, spermatogenesis, and a broad spectrum of diseases. However, the precise involvement of AS in embryo implantation is still unclear. In this review, we summarize the potential roles of AS in regulating mesenchymal-epithelial transitions during embryo implantation, specifically in epithelium regeneration and decidualization initiation via the mesenchymal-epithelial transformation process. Overall, this review emphasizes the impact of AS and splicing variants on embryo implantation and offers novel insights into the potential application of alternative splicing in the treatment of female infertility.

Objective To explore the mechanism of Quhan Zhufeng Mixture on proliferation and apoptosis of rheumatoid arthritis fibroblast-like synoviocyte(RA-FLS)based on NDRG2/JAK2/STAT3 signaling pathway.Methods RA-FLS cells were cultured in vitro,and were divided into ① blank serum group,methotrexate group,Quhan Zhufeng Mixture low-,medium-and high-dosage groups;② blank serum group,AG490 group,Quhan Zhufeng Mixture low-,medium-and high-dosage groups.Different concentrations of drug-containing serum were used to intervene cells.Cell proliferation was detected by CCK-8 method,apoptosis was detected by flow cytometry,and mRNA expressions of Bax,Bcl-2,Caspace-3,Caspace-9,N-myc downstream regulatory gene 2(NDRG2),Janus kinase 2(JAK2)and signal transduction and transcription activator 3(STAT3)were detected by RT-qPCR,Western blot was used to detect the protein expressions of Bax,Bcl-2,Caspace-3,Caspace-9,NDRG2,JAK2,STAT3,p-JAK2 and p-STAT3 in cells.Results Compared with the blank serum group,cell survival rate in methotrexate group,Quhan Zhufeng Mixture all dosage groups significantly decreased(P<0.01),the apoptosis rate significantly increased(P<0.01),the mRNA and protein expressions of Bax and Caspase-9 significantly increased(P<0.05,P<0.01),while the mRNA and protein expression of Bcl-2 significantly decreased(P<0.01),and Caspase-3 mRNA and protein expression in methotrexate group and Quhan Zhufeng Mixture medium-and high-dosage groups significantly increased(P<0.01).Compared with the blank serum group,the mRNA and protein expression of NDRG2 significantly increased in Quhan Zhufeng Mixture all dosage groups(P<0.05,P<0.01),the mRNA and protein expressions of JAK2 and STAT3 were significantly reduced in AG490 group and Quhan Zhufeng Mixture medium-and high-dosage groups(P<0.05,P<0.01),and the expressions of p-JAK2 and p-STAT3 proteins were significantly reduced(P<0.01).Conclusion Quhan Zhufeng Mixture can regulate the proliferation and apoptosis of RA-FLS by regulating the activity of NDRG2/JAK2/STAT3 signaling pathway,playing a role in treating rheumatoid arthritis.

Objective To explore the mechanism of Quhan Zhufeng Mixture on proliferation and apoptosis of rheumatoid arthritis fibroblast-like synoviocyte(RA-FLS)based on NDRG2/JAK2/STAT3 signaling pathway.Methods RA-FLS cells were cultured in vitro,and were divided into ① blank serum group,methotrexate group,Quhan Zhufeng Mixture low-,medium-and high-dosage groups;② blank serum group,AG490 group,Quhan Zhufeng Mixture low-,medium-and high-dosage groups.Different concentrations of drug-containing serum were used to intervene cells.Cell proliferation was detected by CCK-8 method,apoptosis was detected by flow cytometry,and mRNA expressions of Bax,Bcl-2,Caspace-3,Caspace-9,N-myc downstream regulatory gene 2(NDRG2),Janus kinase 2(JAK2)and signal transduction and transcription activator 3(STAT3)were detected by RT-qPCR,Western blot was used to detect the protein expressions of Bax,Bcl-2,Caspace-3,Caspace-9,NDRG2,JAK2,STAT3,p-JAK2 and p-STAT3 in cells.Results Compared with the blank serum group,cell survival rate in methotrexate group,Quhan Zhufeng Mixture all dosage groups significantly decreased(P<0.01),the apoptosis rate significantly increased(P<0.01),the mRNA and protein expressions of Bax and Caspase-9 significantly increased(P<0.05,P<0.01),while the mRNA and protein expression of Bcl-2 significantly decreased(P<0.01),and Caspase-3 mRNA and protein expression in methotrexate group and Quhan Zhufeng Mixture medium-and high-dosage groups significantly increased(P<0.01).Compared with the blank serum group,the mRNA and protein expression of NDRG2 significantly increased in Quhan Zhufeng Mixture all dosage groups(P<0.05,P<0.01),the mRNA and protein expressions of JAK2 and STAT3 were significantly reduced in AG490 group and Quhan Zhufeng Mixture medium-and high-dosage groups(P<0.05,P<0.01),and the expressions of p-JAK2 and p-STAT3 proteins were significantly reduced(P<0.01).Conclusion Quhan Zhufeng Mixture can regulate the proliferation and apoptosis of RA-FLS by regulating the activity of NDRG2/JAK2/STAT3 signaling pathway,playing a role in treating rheumatoid arthritis.

Objective Based on the multi-software visual analysis of the literature on the effect of Janus kinase(JAK)/signal transducer and activator of transcription(STAT)signaling pathway on rheumatoid arthritis in the past decade,the development trend and research hotspot in this field are summarized.To provide researchers with new directions and ideas to promote the innovative development of the field.Methods The literatures related to JAK/STAT signaling pathway in rheumatoid arthritis were collected from the Web of Science Core Collection database from 2013 to 2023.CiteSpace and VOSviewer software were used to analyze the number of publications,countries,authors and keywords of 354 articles retrieved.Results The number of published papers in this field continues to increase.According to the author's research direction,the presentation of high-frequency words,and the attention to the preface and hot topics,it is suggested that this field focuses on gene expression,immune mechanism,inflammatory mechanism,pathway inhibitors,drug therapy,etc.Future research will focus on the safety,mechanism and controlled trials of pathway inhibitors and antirheumatic drugs.Conclusion The effect of JAK/STAT signaling pathway on rheumatoid arthritis has attracted much attention in the past,present and future.There are differences in the research of different teams in this field,and the regional development is unbalanced,suggesting that we should strengthen cooperation and exchanges,focus on the international frontier,and carry out more high-quality research to promote the development and progress of this field,and provide clinical basis.

Objective Through a multi-software visual analysis of the literature on the influence of T cells on rheumatoid arthritis(RA)in recent ten years,the research hotspot and frontier development in this field were summarized.Methods The Chinese and English literature on the influence of T cells on RA from 2012 to 2022 years was retrieved from CNKI and Web of Science database as the research object.CiteSpace and VOSviewer software were used to analyze the number of publications,authors and keywords.Results 519 articles in Chinese and 861 in English were retrieved.The results showed that the number of articles in Chinese increased slowly from 2020 to 2022 years,while the overall trend in English was stable.Keyword analysis shows that it is predicted that future research in this field will focus on the pathogenesis of T cells in RA,the mechanism of bone destruction in RA,disease activity,oxidative stress.Conclusion The influence of T cells on RA has attracted much attention in the past,present and future,and has great research value.However,due to the differences in research priorities at home and abroad,the teams should interact positively and communicate with each other to reveal the internal mechanism of RA and provide theoretical basis for targeted therapy.

This review aimed to summarize the major progress in maternal-fetal medicine achieved by Chinese scientists in recent years. PubMed was systematically searched from January 2020 to November 2023. Publications that reported the progress in embryo implantation, placentation, and parturition made by Chinese scientists in the last 3 years were selected. The milestone events during gestation, embryo implantation, endometrial decidualization, placentation, and parturition are pivotal to a successful pregnancy. Embryo implantation requires intricate interactions between implantation-competent blastocysts and receptive endometrium. To adapt to pregnancy, endometrial stromal cells transform into specialized decidual cells, which occur spontaneously under the influence of ovarian hormones in humans but require the presence of embryos in mice. With embryonic development, the placenta forms to support fetal growth until parturition. The maternal-fetal interface is composed of diverse cell types, including endometrial decidual cells, placental trophoblast cells, endothelial cells, and various immune cells, a sophisticated interplay among which contributes to the maintenance of pregnancy. Near term, the uterus transitions from quiescence to contractility, in preparation for delivery. Disruptions to these events lead to pregnancy-related disorders such as repeated implantation failure, recurrent pregnancy loss, preeclampsia, fetal growth restriction, preterm birth, and infertility. In recent years, Chinese scientists have made prominent achievements in basic research on the aforementioned pregnancy events. Chinese scientists have made remarkable contributions to reproductive biology and maternal-fetal medicine research in recent years, highlighting future research directions in this field.

This review aimed to summarize the major progress in maternal-fetal medicine achieved by Chinese scientists in recent years. PubMed was systematically searched from January 2020 to November 2023. Publications that reported the progress in embryo implantation, placentation, and parturition made by Chinese scientists in the last 3 years were selected. The milestone events during gestation, embryo implantation, endometrial decidualization, placentation, and parturition are pivotal to a successful pregnancy. Embryo implantation requires intricate interactions between implantation-competent blastocysts and receptive endometrium. To adapt to pregnancy, endometrial stromal cells transform into specialized decidual cells, which occur spontaneously under the influence of ovarian hormones in humans but require the presence of embryos in mice. With embryonic development, the placenta forms to support fetal growth until parturition. The maternal-fetal interface is composed of diverse cell types, including endometrial decidual cells, placental trophoblast cells, endothelial cells, and various immune cells, a sophisticated interplay among which contributes to the maintenance of pregnancy. Near term, the uterus transitions from quiescence to contractility, in preparation for delivery. Disruptions to these events lead to pregnancy-related disorders such as repeated implantation failure, recurrent pregnancy loss, preeclampsia, fetal growth restriction, preterm birth, and infertility. In recent years, Chinese scientists have made prominent achievements in basic research on the aforementioned pregnancy events. Chinese scientists have made remarkable contributions to reproductive biology and maternal-fetal medicine research in recent years, highlighting future research directions in this field.

Objective:To explore the cleansing effect of Nitric Oxide (NO) sustained-release silica nanoparticles (short for NO sustained-release agent) on endoscopic biofilm and its clinical application.Methods:A total of 160 clinical endoscopes were randomly divided into two groups: the cleansing agent group (80 pieces, disinfected with cleansing agents), NO group (80 pieces, disinfected with NO sustained-release agent). A biofilm model of Pseudomonas aeruginosa was constructed and used as the control for phosphate buffered solution (PBS) treatment. A biofilm model of Pseudomonas aeruginosa on the surface of endoscopic lumen was built first in vitro. Scanning electron microscopy was then used to observe the microstructure of biofilm after treatment with NO sustained-release agent. Viable counting method was used to evaluate the cleansing effect of NO sustained-release agent on biofilm. Finally, at the clinical level, the actual disinfection effect of NO sustained-release agent on clinical endoscopy was evaluated by detecting the protein residues, viable counting and adenosine triphosphate (ATP) biofluorescence detection. Results:The scanning electron microscopy showed that the biofilm was intact in the model group, but scattered bacteria were observed on the biofilm surface in the NO group and the detergent group. Compared with the model group [(4.86±2.67)×10 6(colony-forming units, CFU)/mL], the standard CFUs of the NO group [(1.37±0.61)×10 4CFU/mL] and the detergent group [(1.31±0.21)×10 5CFU/mL] were significantly lower (detergent group VS model group, P=0.009; NO group VS model group, P=0.008), and there was significant difference between the detergent group and the model group ( t=9.53, P=0.000 6). The levels of residual proteins in the endoscopic lumens before and after the treatment were 8.03±1.47 mg/mL and 0.50±0.37 mg/mL in the NO group, 8.01±1.51 mg/mL and 0.91±0.52 mg/mL in the detergent group with significant difference ( P<0.01), and the reduction effect of the NO group was more significant. The disinfection of NO group and cleaning agent group was within the qualifying range, but the ATP bioluminescence value, protein residue and colony count of NO group (78.56±42.59 RLU, 0.50±0.37 mg/mL, 7.55±4.56 CFU) were significantly lower than those of detergent agent group (120.80±54.00 RLU,0.91±0.52 mg/mL,11.50±4.75 CFU, P<0.01). Conclusion:NO sustained-release agent can effectively clear endoscopic biofilm and further improve the disinfection effect on endoscopes, which may be of great significance for improving the effects on treatment and prognosis of patients.

【Objective】 To explore the psychological experience of blood donors with blood donation-related vasovagal reaction (DRVR), so as to provide basis for improving the quality of blood donation services. 【Methods】 The real experience of 9 DRVR blood donors was analyzed using the phenomenological research method in qualitative research. 【Results】 The occurrence of DRVR caused distinct psychological conflict among blood donor. Blood donors lacked knowledge about blood donation and expected professional evaluation and continuous support. The occurrence of DRVR was an important reason for blood donor lapsing. 【Conclusion】 By resolving the distinct psychological conflicts of DRVR blood donors, establishing DRVR early warning evaluation and feedback system, as well as strengthening the construction of support system, blood collection and supply institutions can create a good humanistic and social environment for sustainable development of voluntary blood donation.