Background miRNAs are a group of non-coding small RNA molecules,and they play an important role in regulating the apoptosis of LECs.The biological effects and mechanisams of miRNAs on LECs in agerelated cataract still need to be further elucidated.Objective This study was to investigate the anti-oxidative effects of miR-204 on age-related cataract in vitro.Methods The specimens of anterior lens capsules from agerelated cataract patients and normal donors were collected in Shandong Eye Institution and 20 subjects for each.The expression level of miR-204 was detected and compared between cataractous eyes and normol eyes by real-time fluorescence quantitative PCR (RT-qPCR).HLE-B3 cells,a human LEC line,were cultured,and the oxydative stress models of LECs were established by adding 200 μmol/L H2 O2 in the medium.The models were divided into model control group,miR-204 agomir group,agomir negative control group,miR-204 antgomir group and antagomir negative control group according to the difference of tranfected agents,and normal cells served as the control group.Twenty-four hours after transfection,the expression levels of miR-204 mRNA in the cells of various groups were detected by RT-qPCR to varify the transfection rate.Apoptosis rate of the cells was assayed by flow cytometry.The relative expression levels of TP53INP1 mRNA and p53 mRNA as well as their proteins were detected by RT-qPCR and Western blot,respectively.Results The mean expression level of miR-204 was significantly lower in the anterior lens capsules of cataractous eyes than that in the normal eyes (t=14.21,P＜0.05).The mean apoptosis rate of cells was 1.31±0.12,4.90±0.28,2.60±0.15,4.39±0.20,5.74±0.13 and 4.34±0.63 in the normal control group,model control group,miR-204 agomir group,agomir negative control group,miR-204 antgomir group and antagomir negative control group,respectively.The apoptosis rate was significantly increased in the model control group compared with the normal control group (t =-20.69,P＜0.01) and the apoptosis rate was also increased in the miR-204 antagomir group compared with antagomir negative control group (t =3.79,P＜0.05);while the apoptosis rate in the miR-204 agomir group was significantly declined in comparison with agomir negative control group (t=-12.20,P＜0.01).The relative expression levels of TP53INP1 and p53 mRNA and proteins in the cells were significantly higher in the model control group than those in normal control group (mRNA:t =6.44,11.71,both at P＜0.0I;protein:t =10.72,19.40,both at P＜0.01),and so were between the miR-204 antagomir group and antagomir negative control group (mRNA:t =4.07,3.74,both at P＜ 0.05;protein:t =7.18,10.58,both at P＜0.05).However,the expression levels of TP53INP1 and p53 mRNA and protein were significantly reduced in the miR-204 agomir group in comparison with the agomir negative control group (mRNA:t =-19.28,-10.58,both at P＜0.05;protein:t=-6.50,-6.36,both at P＜0.05).Conclusions miR-204 induces oxidative damage of age-related cataract via targeting TP53INP1,which suggests that the activation of TP53INP1-p53 signaling may be involved in the development of age-related cataract.

Objective To investigate the changes of the expression of HSP90? in the liver of severely scalded rats at the early stage of stress Methods The expression levels of HSP90? in the liver of rats at different time points after severe scald were detected by Western blotting and then the expression of HSP90? in the nucleuses was observed by immunohistochemistry Results The expression of HSP90? significantly increased in the liver of rats after severe scald, especially during 12～48 h Abnormal high expression of HSP90? in the nucleuses around was found at 48 h after scald Conclusion The abnormal high expression of HSP90? due to severe scald may be one of the important causes resulting in the disorder of glucocorticoid receptor at the early stage of stress after severe trauma.

Objective To investigate the risk factors of postoperative complications in patients with spinal tuberculosis and analyze the value of prognostic nutritional index(PNI)in predicting these complications.Methods The clinical data of 156 patients with spinal tuberculosis who underwent surgery in the Affiliated Hospital of Zunyi Medical University from January 2018 to July 2022 were retrospectively analyzed.The patients were divided into a complication group and a non-complication group based on the presence or absence of postoperative complications.Baseline data,laboratory indicators,and surgery-related indicators were compared between the two groups.The risk factors for postoperative complications in spinal tuberculosis were analyzed,and receiver operating characteristic(ROC)curves were plotted to evaluate the predictive value of PNI for postoperative complications in the patients.Results Among all of 156 patients,68 contracted a total of 82 instances of postoperative complications,with an incidence of 43.59%.Coinfection with pulmonary tuberculosis,preoperative anti-tuberculosis treatment duration more than 4 weeks,surgical operation duration,and drainage days were identified as independent risk factors for postoperative complications in spinal tuberculosis(P<0.05).On the other hand,a higher PNI was found to be a protective factor against postoperative complications of the spinal tuberculosis(P<0.05).The area under the ROC curve for PNI predicting postoperative complications ofthe spinal tuberculosis was 0.805.Conclusion The risk of postoperative complications in patients with spinal tuberculosis is subject to such factors ascoexistence of pulmo-nary tuberculosis,preoperative anti-tuberculosis treatment duration,surgery duration,drainage duration,and preoperative PNI.Preoperative PNI has a certain value for predicting the postoperative complications in the patients.