BACKGROUND: Hydrogen sulfide signaling has been proved to promote distraction osteogenesis; however,the underlying mechanism remains unclear.OBJECTIVE: To evaluate the relationship between hydrogen sulfide and hypoxia-inducible factor-1α (HIF-1α)during the osteogenesis of rat bone marrow mesenchymal cells under tensile stress.METHODS: 2000 μ strain was loaded on the in vitro cultured rat bone marrow mesenchymal cells by a four-point bending apparatus, and hydrogen sulfide donor or HIF-1α inhibitor was adopted in the tensile unit. Subsequently, the levels of osteogenic markers were detected.RESULTS AND CONCLUSION: Exogenous hydrogen sulfide signaling could promote the osteogenesis of rat bone marrow mesenchymal cells under tensile stress. However, this promotion was obviously eliminated when the endogenous HIF-1α expression was inhibited.These results show that hydrogen sulfide signaling system promotes the osteogenesis of rat bone marrow mesenchymal cells under tensile stress probably through HIF-1α.

Objective: To investigate the association between frailty and type 2 diabetes mellitus (T2DM) using a bidirectional two-sample Mendelian randomization (MR) analysis, so as to provide the evidence for the prevention and control of frailty and T2DM. Methods: Frailty status was assessed using the Fried Frailty Score (FFS), with aggregated data sourced from 386 565 European samples in the UK Biobank. The T2DM data were obtained from the summary results of genome-wide analysis published by the Diabetes Genetics Replication and Meta-analysis Consortium, excluding the UK Biobank data, including 455 313 European samples. Eligible single nucleotide polymorphism site were selected from the FFS and T2DM summary data as instrumental variables. The bidirectional MR analysis was performed using the inverse-variance weighted method. The heterogeneity was assessed using the modified Cochran Q test. The horizontal pleiotropy of instrumental variables was examined using MR-Egger regression. The robustness of the results was evaluated using the leave-one-out method. The bias was tested using funnel plot. Results: The forward MR analysis revealed a statistically significant association between increased FFS and an increased risk of T2DM (OR=2.280, 95%CI: 1.169-4.447). The reverse MR analysis showed a statistically significant association between T2DM and increased FFS (β=0.026, 95%CI: 0.012-0.041). Both bidirectional MR results were robust, with no horizontal pleiotropy of the instrumental variables was found (all P>0.5); and the funnel plots did not show significant basis. Conclusion The study found a bidirectional causal association between frailty and T2DM.

Abstract: In order to investigate immune protection against swine-origin influenza virus (S-OIV) A H1N1, the helper-dependent adenovirus vector (HDAd) system was exploited to construct recombinant HDAd encoding hemagglutinin (HA). The HA gene was synthesized and cloned to the HDAd backbone. Then, the HDAd/HA DNA molecules were transfected into 293Cre4 cells with calcium phosphate. The cells were infected by helper virus 16 hours after the transfection. The 293Cre4 cells were coinfected with HDAd/HA and the helper virus for large-scale preparation of HDAd/HA. The HDAd/HA was obtained and purified twice with CsCI density ultracentrifugation and observed morphologically under transmission electron microscope, and the expression of HA protein was analyzed with RTPCR. Recombinant HDAd/HA expressing HA protein was successfully constructed which could pave the way for in vivo investigation on immunogenicity and efficacy against S-OIV A H1N1 infection.
Adenoviridae ; Cell Line ; Cloning, Molecular ; Genetic Vectors ; Helper Viruses ; Hemagglutinin Glycoproteins, Influenza Virus ; biosynthesis ; Humans ; Influenza A Virus, H1N1 Subtype

Objective:To analyze the application and regularity of acupoint selection of Sanyinjiao (SP 6) based on data mining.Methods:Search for literatures in CNKI, Wanfang, VIP, and Pubmed, the clinical researches of acupuncture on Sanyinjiao (SP 6) point were selected, according to the inclusion and exclusion criteria, and the retrieval period was from database construction to September 30th, 2021. Excel 2016, SPSS Statistics 25.0, SPSS Modeler 18.0 were used to perform descriptive analysis, association analysis and cluster analysis.Results:After literature screening, a total of 261 literatures were included, involving 73 kinds of diseases, mainly including mental and behavioral disorders, genitourinary diseases, endocrine and nutritional metabolism diseases and nervous system diseases. The most frequently used acupoints in Sanyinjiao (SP 6) compatibility are Zusanli (ST 36), Baihui (GV 20), Guanyuan (CV 4) and Taichong (LR 3), most of which focus on stomach meridian, conception channel, governor channel and bladder meridian. Seven categories were extracted among high-frequency acupoints by cluster analysis. The association rule analysis showed that the commonly used combination of Sanyinjiao (SP 6) were Zusanli (ST 36)-Sanyinjiao (SP 6), Baihui (GV 20)-Sanyinjiao (SP 6), and Guanyuan (CV 4)-Sanyinjiao (SP 6).Conclusions:Sanyinjiao (SP 6) is widely used in clinical application, and it is always compatible with stomach meridian, conception vessel, governor channel acupoints, especially those acupoints on the outer and inner meridians and the upper and lower parts. Sanyinjiao (SP 6) combined with other acupoints can treat diseases of multiple systems, such as insomnia, stroke, anxiety and depression, dysmenorrhea, infertility, etc. Clustering and association analysis found the core compatibility law of Sanyinjiao (SP 6), which can be used as a reference for clinical acupoint selection.