Objective To explore the effects and mechanisms of human umbilical cord mesenchymal stem cell (HUC-MSC)-derived exosomes (Exo) pretreated with Huangkui capsules on renal ischemia-reperfusion injury (IRI). Methods HUC-MSCs were cultured in media containing different concentrations of Huangkui capsules for 24 hours to determine cell viability and select an appropriate concentration for subsequent experiments. HUC-MSCs were pretreated with 50 μg/mL Huangkui capsules for 24 hours, and Exo were extracted using an exosome extraction kit. The morphology was observed under a transmission electron microscope, particle size was measured by nanoparticle tracking analysis, and the expression of exosomal membrane surface marker proteins was detected by Western blot. Human renal tubular epithelial cells (HK-2 cells) were randomly divided into hypoxia/reoxygenation group (M group), hypoxia/reoxygenation + Exo group (E group), and hypoxia/reoxygenation + Huangkui capsules pretreated Exo group (H group). Western blotting was used to measure the expression of endoplasmic reticulum stress (ERS)-related proteins, and real-time fluorescent quantitative reverse transcription polymerase chain reaction was used to measure the expression of ERS-related gene messenger RNA (mRNA). Mice were randomly divided into sham operation group (Sham group), ischemia-reperfusion group (I/R group), ischemia-reperfusion + Exo group (E group), and ischemia-reperfusion + Huangkui capsules pretreated Exo group (H group). Renal histological assessment, serum creatinine (Scr), blood urea nitrogen (BUN) measurement and inflammatory factor detection were performed 24 hours later. Results Both Exo and Huangkui capsules prereated Exo had a bilayer membrane structure and a cup-shaped morphology; their average particle sizes were 116.8 nm and 81.3 nm, respectively. Both expressed CD9, CD63, TSG101. Compared with the M group, the E group had decreased relative expression of transcription factor 6 (ATF6) and protein kinase R-like endoplasmic reticulum kinase (PERK) proteins, increased mRNA relative expression, increased relative expression of C/EBP homologous protein (CHOP) protein, and decreased mRNA relative expression. Compared with the E group, the H group had decreased relative expression of ATF6, PERK, CHOP proteins, and decreased mRNA relative expression of ATF6 and PERK (all P<0.05). Animal experimental results showed that compared with the Sham group, the I/R group had increased renal tubular injury scores, Scr, BUN, interleukin (IL)-1β, IL-10, IL-18, tumor necrosis factor (TNF)-α levels. Compared with the I/R group, the E and H groups had decreased renal tubular injury scores and Scr, BUN, IL-1β, IL-10, IL-18, TNF-α levels. Compared with the E group, the H group had decreased renal tubular injury scores and Scr, BUN, IL-1β, IL-10, IL-18, TNF-α levels (all P<0.05). Conclusions Huangkui capsules pretreatment HUC-MSC-derived Exo may alleviate renal IRI by inhibiting ERS.

Ethical utilitarianism is a consequence-oriented ethical theory that pursues the maximization of happiness and fully considers the long-term impact of behavior. In the ethical review of human organ donation and transplantation, this theory is mainly applied in three aspects, ethical review supervision, process and content. However, in practice, it faces challenges such as the difficulty and subjectivity of utility calculation, the balance between individual rights and social welfare, the long-term impact of decision-making, and international cooperation under a global perspective. Therefore, governance strategies such as improving ethical review policy rules, refining the ethical review system by drawing on international experience, and strengthening public education and publicity are proposed. Despite many challenges, ethical utilitarianism still provides an important theoretical framework for the ethical review of human organ donation and transplantation. Therefore, this article reviews the application of ethical utilitarianism in the ethical review of human organ donation and transplantation and its challenges, aiming to provide a reference for related research on the ethical review of human organ donation and transplantation.

In order to improve the poor photostability of nifedipine, this study designed a cocrystal based on the principles of crystal engineering and prepared nifedipine-imidazole cocrystal by suspension method. The new cocrystal was characterized by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), thermogravimetric analysis (TG) and infrared spectroscopy (IR) to confirm the formation of the cocrystal. The photostability of nifedipine and its cocrystal was measured by powder X-ray diffraction and high-performance liquid chromatography (HPLC). The results showed that the nifedipine-imidazole cocrystal improved the photostability of nifedipine to a certain extent. This study provides guidance for the development of nifedipine cocrystals and the improvement of its druggability.

Objective To investigate the effects of arginine-glycine-aspartic acid(RGD)peptide hydrogels at differ-ent concentrations on the activation of Tenon capsule fibroblasts(HTF)and the expression of Yes-associated protein(YAP).Methods Three concentrations(0.5％,1.0％,2.0％)of RGD peptide hydrogels were prepared.Their internal microstructures were observed under a transmission electron microscope,and their elastic moduli(E)were measured using the rheological test.SD male rat models with conjunctival injury were established and divided into a blank group(no treatment),a low-concentration RGD group(subconjunctival injection of 0.5％RGD peptide hydrogel),a medium-con-centration RGD group(subconjunctival injection of 1.0％RGD peptide hydrogel),and a high-concentration RGD group(subconjunctival injection of 2.0％RGD peptide hydrogel).After one week,tissues were collected,and collagen fiber pro-liferation in the rat conjunctiva was observed after Masson staining.Immunohistochemistry was performed to detect the ex-pression of YAP and α-smooth muscle actin(α-SMA)in the rat conjunctiva.Scar formation cell models were constructed by stimulating HTF activation with transforming growth factor-β2(TGF-β2).According to experimental requirements,the cells were divided into a control group,a 0.5％RGD hydrogel group,a 1.0％RGD hydrogel group,a 2.0％RGD hydrogel group,and a normal group,and co-cultured for 24 hours.The relative expression levels of YAP,connective tissue growth factor(CTGF),α-SMA,fibronectin(FN),and type Ⅰ collagen(Col Ⅰ)proteins in HTF were detected by Western blot.The localization of cytoskeletal protein(F-actin)and YAP protein expression was observed under a confocal laser scanning mi-croscope.Results Electron microscopy showed that the crosslinking density of the nanofibers inside the RGD peptide hydrogel increased with the rise of the peptide concentration.Rheological measurements indicated that the E values of the 0.5％,1.0％,and 2.0％RGD peptide hydrogels were approximately 0.067 kPa,0.150 kPa,and 2.170 kPa,respectively.Masson staining results revealed that the area of collagen fiber proliferation in the conjunctiva of rats in the medium-concen-tration RGD group was significantly lower than that in the blank group(P＜0.05),while it showed no significant difference in the low-concentration and high-concentration RGD groups compared with the blank group(both P＞0.05).Immunohis-tochemistry results showed that the relative expression levels of YAP and α-SMA proteins in the conjunctiva of rats in the low-,medium-,and high-concentration RGD groups decreased compared to the blank group,and the decrease was the most significant in the medium-concentration RGD group(all P＜0.05).Cell immunofluorescence staining results indicated that the green fluorescence of F-actin was attenuated,and the red fluorescence of YAP was translocated from the nucleus to the cytoplasm in the 0.5％,1.0％,and 2.0％RGD hydrogel groups compared to the control group.Western blot results showed that the relative expression levels of YAP,CTGF,α-SMA,FN,and Col Ⅰ proteins in HTF were lower in the 0.5％,1.0％,and 2.0％RGD hydrogel groups compared to the control group,with the 1.0％RGD hydrogel group showing the most significant reduction(all P＜0.05).Conclusion With the optimal concentration of 1.0％,the RGD peptide hydro-gel can inhibit YAP protein expression and nuclear translocation and reduce HTF activation and the expression of fibrotic proteins,thus alleviating scar formation.

With the development of space technology,the health risks for astronauts in space have also increased,which has made the application value of telemedicine technology in space exploration more prominent.In the outer space environment,various exogenous and endogenous factors may affect human health in multiple ways.As deep space exploration advances and space technology develops,the risks of astronauts'health issues in space increase,and telemedicine technology has important application value in space exploration,which is related to astronauts'lives,health,and the success of missions.This article summarizes the research progress of telemedicine technology in recent years,analyzes remote medical diagnosis and treatment,intelligent surgical robots,and the application of artificial intelligence,discusses the latest progress in related fields at home and abroad,and provides a reference for the medical support of long-term space flight.

Objective·To explore the association between gene-gene interaction of glutamate pathway and anhedonia.Methods·A total of 279 patients with schizophrenia(SZ)and 236 patients with major depression disorder(MDD)recruited in the outpatient department and ward of Shanghai Mental Health Center,Shanghai Jiao Tong University School of Medicine,and 236 healthy controls(HC)recruited in the community from January 2017 to August 2020 were included in the study.General demographic data and clinical characteristics of the three groups were collected and compared.The Chinese version of Temporal Experience of Pleasure Scale(TEPS)was used to evaluate the pleasure experience ability of the three groups.Generalized multifactor dimensionality reduction(GMDR)method was used to establish the interaction model of the single nucleotide polymorphism(SNP)in glutamate pathway genes(NOS1AP,GSK3β,DAOA,DISC1 and GRIN2A).According to the interaction model,SZ and MDD patients were divided into high-risk group and low-risk group,and the differences in pleasure experience ability were compared between the two groups,so as to analyze the effect of gene-gene interaction on anhedonia.Results·There were significant differences in age and years of education among the three groups,and in age of onset and duration of illness between SZ and MDD groups(all P=0.000).There were significant differences among the three groups of participants in terms of overall pleasure experience,anticipatory pleasure experience and consummatory pleasure experience(all P=0.000);the overall pleasure experience,anticipatory pleasure experience and consummatory pleasure experience in the SZ and MDD group were lower than those in the HC group(all Pcorr=0.000),and there was marginal statistical difference in anticipatory pleasure experience between the SZ and MDD groups(Pcorr=0.051).Through GMDR modeling,it was found that the 2-loci interaction model composed of DAOA-rs3916965 and DISC1-rs821577 had a predictive effect on the overall pleasure experience ability of SZ patients(P=0.003),and the 2-loci interaction model composed of NOS1AP-rs1858232 and GRIN2A-rs1014531 had a predictive effect on the anticipatory pleasure experience ability of MDD patients(P=0.037);moreover,the overall pleasure experience ability of patients in the SZ high-risk group and anticipatory pleasure experience ability of patients in MDD high-risk groups were lower than those in their low-risk groups(t=3.443,P=0.000;t=3.471,P=0.001).Conclusion·The interaction of glutamate pathway gene polymorphisms may be involved in the occurrence of anhedonia.

Objective To explore the potential mechanism of action of paeoniflorin in diabetes mellitus,the related targets and pathways were preliminarily discussed,based on the network pharmacology and molecular docking technology.Methods Analyze the potential targets of paeoniflorin using the Swiss Target Prediction database.Genecards and OMIM databases yielded the genes of diabetes-related illnesses.After taking the intersection of the two,protein-protein interaction network(PPI)was established using STRING and Cytoscape programs to search for key genes with strong correlation and complete gene ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)enrichment analysis.Use AutoDockTools and Pymol programs to complete protein molecule docking validation.Results The pharmacologically-related study revealed 63 targets associated with paeoniflorin,4 758 genes related to diabetes,and 50 intersection targets.15 key genes including vascular endothelial growth factor A(VEGFA),epidermal growth factor receptor(EGFR),V-Ha-ras harvey(HRAS),V-src sarcoma(SRC)and heat shock protein hs 90-alpha(HSP90AA1)were screened.RAs-associated protein 1,Ras,calcium and other signaling pathways were obtained by KEGG pathway analysis.Molecular docking results showed that paeoniflorin had good binding ability with key genes.Conclusion Paeoniflorin can treat diabetes through multiple targets and pathways,and this mechanism can provide a basis for the application of paeoniflorin in anti diabetes and drug research and development.

Objective To analyze serum characteristics and determine the reference range for thyroid function among healthy 11～16 year-old teenagers in Xi'an in order to offer a theoretical basis for clinical diagnosis and therapy.Methods A sum of 1 378 healthy 11～16 year-old teenagers who met the inclusion criteria from the First Affiliated Hospital of the Air Force Medical University(Xijing Hospital)between January 2020 and December 2022 were selected as research subjects,including 628 males and 750 females.They were divided into three groups based on age:Group 1:11～＜13 year-olds(433 cases),Group 2:13～＜15 year-olds(425 cases),and Group 3:15～≤16 year-olds(520 cases).Differences in serum thyroid function indices among different genders and age groups were analyzed,the reference ranges for these indices were established,and 99 healthy 11-16 year-old teenagers who met the inclusion criteria were chosen for verification.Results There were no significant differences between different genders in thyroid stimulating hormone[TSH,2.56(1.80,3.63)μIU/ml vs 2.43(1.68,3.48)μIU/ml]and total thyroxine[TT4,97.84(85.34,111.00)nmol/L vs 98.20(87.16,111.23)nmol/L],the differences were statistically significant(Z=-1.881,-0.638,all P＞0.05).Meanwhile,the differences in free thyroxine[FT4,16.93(15.49,18.60)pmol/L vs 16.26(14.80,17.83)pmol/L],free triiodothyronine[FT3,6.21(5.66,6.80)pmol/L vs 5.59(4.98,6.19)pmol/L],and total triiodothyronine[TT3,2.24(1.96,2.55)nmol/L vs 2.04(1.78,2.34)nmol/L]between different genders were significant(Z=-5.368,-11.994,-6.417 all P＜0.01).The differences in thyroid function indices were significant among different age groups(Z=10.649～261.003,all P＜0.05).The reference ranges for thyroid function indices across different age groups and genders were established,in which thyroid function indicators were verified to be within the established reference range by 99 samples.Conclusion Teenage hormone secretion varies greatly,and the secretion of thyroid hormones is influenced by various factors.Thus,the diagnosis and treatment of teenage thyroid diseases cannot fully rely on the reference ranges provided by adults or manufacturers.This study established the reference range of the thyroid function indices of 11～16 year-old teenagers in Xi'an,offering clinical doctors'diagnosis and treatment data support.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.