RESUMO
Objective To investigate both in mechanism of hyperoxia-induced acute lung injury (HALI) by vivo experiment,to observe the Bruton' s tyrosine kinase (Btk) and nuclear factor kappa B (NF-κB) signals expression level.Methods Total of 72 healthy male Kunming mice were randomly (random number) divided into four groups:air control group,hyperoxia exposure 3 days group (H3d group),hyperoxia exposure 3 days + inhibitor group (H3d + Ⅰ group) and inhibitor groups.Then the pathological changes of lung tissues were observed under light microscope;The total protein content (TP) of bronchoalveolar lavage fluid (BALF) and wet/dry weight ratio (W/D) of lung were detected;The protein expression of Btk,p-Btk,pNF-κB p65 were mersured by Western blot;tlhe mRNA level of IL-6 was determined by real-time polymerase chain reaction (qRT-PCR);the level of monocyte chemoattractant protein-1 (MCP-1) in serum was detected by enzyme-linked immunosorbent assay (ELISA).Statistcal significance was determined by 1-way ANOVA.Results There were no significant difference in the data between the control group and the inhibitor group (P ＞ 0.05).The pathological injury in light microscope,content of total protein in BALF,W/D ratio of lung tissues in H3d group were significantly higher than H3d + Ⅰ group (Respectively P =O.002,P =0.000).Western blot analysis showed that expression of Btk,p-Btk,pNF-κB p65 in H3d group were significantly higher than those in H3d + Ⅰ group (Respectively P =0.002,P =0.013,P =0.000).RT-qPCR results showed that the expression of IL-6 mRNA in H3d group were significantly higher than control group (P =0.004),inhibitor group (P =0.000) and H3d + Ⅰ group (P =0.021).In addition,The serum MCP-1 levels in H3d group were higher markely than the control group (P =0.002),inhibitor group (P =0.000) and H3d + Ⅰ group (P =0.009).The correlation analysis showed that pNF-κB p65 were positively correlated wiht Btk and p-Btk (r =0.902 and 0.954,P ＜ 0.01).Conclusions Btk may trigger the release of IL-6 and MCP-1 by mediating the signaling pathway of NF-κB in vivo study,which was most important in the occurrence of HALI.Therefore,inhibiting the Btk activity would alleviate the severity of lung injury effectively.
RESUMO
Objective To investigate risk factors that affect type 2 diabetic cardiac arrhythmia.Methods Clinical data of 292 diabetic patients who were performed examination of low limb vascular were analyzed retrospectively.Based on electrocardiogram,the patients were divided into cardiac arrhythmia group and non-cardiac arrhythmia group with case-control study,and the clinical data and evaluation indexes of lower extremity vascular disease were compared between two groups.Results Data comparison between two groups indicated age [(59 ± 14) years vs (54 ± 12) years],symptoms of low limbs [40.7％ vs 29.0％] had statistical significance (P ＜ 0.05).Glycosylated hemoglobin,hypertension history,results of color Doppler ultrasound for lower limbs artery,ankle-brachial index,toe-brachial index,transcutaneous oxygen pressure,heat-controlled laser Doppler between two groups had no statistical significance (P ＞ 0.05).Age,gender,history of high blood pressure,symptoms of low limbs,and heat-controlled laser Doppler were analyzed with multiple logistic regression,which indicated that age was risk factor of type 2 diabetic arrhythmia.Conclusions Age is correlated with type 2 diabetic arrhythmia,and evaluation indexes of lower limb vascular disease have no significant correlation with type 2 diabetic arrhythmia.