Objective To compare the changes of lung cell pyroptosis indexes in heat stress rats through different target temperature cooling intervention on classical heat stroke(CHS)rats,and to explore the choice of suitable target temperature of CHS.Methods A total of 40 male SD rats were divided into the blank control group(n=10)and classical heat stroke(CHS,n=30)group according to the random number table method.The CHS group was divided into the CHS0 group(Tic),CHS1 group(Tic-1℃)and CHS2 group(Tic+1℃)according to the initial core temperature(Tic)±1℃.After anesthesia,the rats in CHS group were placed by the prone position in the thermal environment simulation chamber,and the heat shock rat model was established when the core body temperature reached 42℃.Immediately after successful model-ing,the room temperature water bath was used to cool down to the setting target temperature of the group,and then the cooling blanket was used to maintain the body temperature for 3 h.The blank control group was always kept at room temperature.At the end of the experiment,the blood samples of femoral artery of rats were collected,and the levels of serum interleukin-1β(IL-1β)and interleukin-18(IL-18)were detected by ELISA.The lung samples of rats were taken to prepare the tissue homogenate.Then the concentrations of IL-1β and IL-18 in the lung tissue were detected by ELISA and Western blot method was used to detect GSDMD and cysteine aspartate protease-1 precursor(pro-caspase-1)protein expression levels in rat lung tissue,and the enzyme activity in the sample was calculated according to the formula or standard curve.Results The levels of IL-1β and IL-18 in lung tissues and serum in the CHS0 group and serum IL-18 level in the CHS1 group were higher than those in the blank control group(P<0.05).The lung tissue IL-1β level in the CHS1 group,the IL-1β and IL-18 levels in the CHS2 group,and the IL-18 level in the serum CHS1 and CHS2 groups were lower than those in the CHS0 group.There was no statistically significant difference between the CHS1 group and CHS2 group.The GSDMD and pro-caspase-1 levels in the CHS0 group and CHS2 group,and the GSDMD level in the CHS1 group were higher than those in the blank control group(P<0.05).The GSDMD and pro-caspase-1 levels in the CHS1 group and CHS2 group were lower than those in the CHS0 group,and the pro-caspase-1 level in the CHS1 group was lower than that in the CHS2 group.Conclusion The expression levels of lung pyroptosis effective molecules and proteins in lung cells of heat stress rats are increased,and the cool-ing intervention could alleviate the lung tissue cellular pyroptosis.A cooling intervention setting the target temperature to a certain range above or below the initial core temperature may have a better protective effect on the lung tissue of heat stress rats.

Objective To investigate the clinical characteristics,treatment and prognosis of patients with acute myocardial infarction complicated with ventricular septal perforation and ventricular aneurysm formation. Methods The clinical data,treatment methods and prognosis of 11 patients, who admitted between January 2012 and December 2016 in Xinjiang Uygur Autonomous Region People 's Hospital,with acute myocardial infarction complicated with ventricular septal perforation and ventricular aneurysm were analyzed retrospectively. Results the killip grading of the 11 patients were Grade Ⅱ in 1 patients. Grade Ⅱ in 2 patients and Grade Ⅲ in 8 patients .The infarction site was found at the anterior wall in 3 patients,diffuse anterior well in 1 patients,inferior wall in 1 patient, anterior-inferior infarction in 3 patients and diffuse anterior-inferior infarction wall in 1 patient. Septal perforation was found at posterior septum in 5 patients muscular septum in. Patient and at apex in 5 patients. Septal perforation was identified within 24 hours of infarction in 1 patient,within 1-7 days in 3 patients and beyond 7 days after infarction in 7 patients .4 patients with septal perforation chosed conservative medical management only and 2 of them died 1 month later.2 patients had PCI in addition to medical treatment but both of them died in 3 months after discharge. 2 patients had IABP supper,and 1 of then died within 1 week during hospitalzation and the other one died 1 week after discharge. 2 patients received PCI and electric amplatzer closure(4-6 weeks after AMI,and 1 patient received PCI plus elective surgical septal repair and ventricular aneurysm reshaping at 6 months after AMI. All 3 patients survived during follow up. Conclusions For patients with acute myocardial infarction complicated with ventricular septal perforation and ventricular aneurysm formation,aggressive intervention and treatment will improve the clinical prognosis.