Objective To investigate the effects of inducible hypothermia on expressions of peroxisome proliferator activated receptor gamma coactivator-1 (PGC-1) and small heterodimer partner (SHP) in rat model of hemorrhagic shock.Methods SD rats were randomly (random number) divided into three groups:control (C),normothermia (N) and hypothermia (H).Exsanguination was carried out in rats by continuously drawing out venous blood (25 mL/kg) over 15 minutes to establish hemorrhagic shock model.Then,rectal temperatures of rats were maintained by body surface cooling to 32℃ in H group and by body surface warming to 38℃ in N group,respectively.After a shock period of 60 minutes,rats received the infusion of whole blood of their own and lactated Ringer's solution (1 ∶ 2) treatment for 60 min.Rats were warmed to 38℃ by body surface warming and monitored for 3 h after resuscitation.Hematocrit (Hct),base excess (BE),lactate (Lac),and glucose (Glu) were recorded before modeling and after different lengths of hemorrhagic shock period (HSP).The expressions of PGC-1 mRNA and SHP mRNA and the levels of their protein in liver were tested by real-time reverse transcription polymerase chain reaction (qRT-PCR) and western blotting,respectively.Results The H group had lower lactate levels and higher BElevels than the N group [(6.3±2.1) vs.(10.4±1.5) and (-4.7±2.5) vs.(-9.0±3.2)] (P＜ 0.05).At 72 hours after modeling,there were four survivors in the N group and seven survivors in the H group (P ＜ 0.05,Log Rank).The expressions of PGC-1 mRNA and SHP mRNA increased in N group.Hypothermia resuscitation down-regulated PGC-1 mRNA expression,meanwhile,increased expression of SHP mRNA.Both Hypothermia and Normothermia resuscitation increased SHP protein levels,but decreased PGC-1 protein levels.Conclusions Inducible hypothermia ameliorated acidosis and energy metabolism imbalance through adaptive regulation in PGC-1 and SHP.

Objective To investigate the effects of environmental hypothermia on hemodynamics and oxygen metabolism in unanesthetized swine model of hemorrhagic shock.Methods A total of 16 Bama pigs provided by animal experiment centre of the General Hospital of Shenyang Military Command were randomized into two groups ( n =8,each):ambient temperature (A) and hypothermia ( H ).Venous blood (30 mL/kg) was continously withdrawn over 15 minutes to establish hemorrhagic shock model.Core temperature,heart rate,mean arterial pressure,central venous pressure,cardiac output,saturation of mixed venous blood and blood gas analysis were recorded at the baseline and different hemorrhagic shock time.DO2I and VO2I,and the O2 extraction ratio (O2ER) were calculated.Results Core body temperature in group A decreased slightly after hemorrhagic shock model had established and environmental hypothermia resulted in more reduction in core body temperature.The mortality rate was significantly higher in group H (50％) than in group A (0％) (P ＜0.05).DO2I and VO2I decreased significantly after hemorrhage.No difference was found in hemodynamics,DO2I and VO2I between group A and group H,but the difference of pH,lactic acid and O2ER were significant between the two groups (P ＜ 0.05 ).conclusions Environmental hypothermia aggravated the disorder of oxygen metabolism after hemorrhagic shock,which was associated with poor prognosis.

Objective:To investigate the expressions of glutathione S-transferases M1 (GSTM1) and glutathione S-transferases M2 (GSTM2) in follicular thyroid carcinoma (FTC) and their clinical significances.Methods:Gene expression profile of GSE82208 generated from 52 human thyroid samples, including 27 cases of FTC and 25 cases of follicular adenoma (FA) were collected from Gene Expression Omnibus (GEO) database. The gene matrix data were extracted and analyzed, and then differentially expressed genes (DEG) between FTC and FA were identified by using Limma package. Immunohistochemical SABC method was used to detect the expression levels of GSTM1 and GSTM2 proteins in FTC tissues and FA tissues collected from 56 FTC samples and 56 FA samples in Dandong First Hospital of Liaoning Province from January 2000 to December 2020. The relationship between GSTM1 and GSTM2 was analyzed; the association of expression levels of GSTM1 and GSTM2 with the clinicopathological factors of FTC patients was also analyzed.Results:Based on the GEO database, a total of 40 DEG were identified, including 9 up-regulated DEG (GSTM1, GSTM2, COL6A2, CUX2, CLUH, TSC2, OGDHL, ACADVL, SDHA) and 31 down-regulated DEG in FTC. The immunohistochemistry results of samples resected showed that the positive rates of GSTM1 and GSTM2 proteins in FTC tissues were higher than those in FA tissues [71.4% (40/56) vs. 23.2% (13/56), 80.4% (45/56) vs. 14.3% (8/56)], and differences were statistically significant ( χ2 values were 26.11 and 49.03, both P < 0.01). The expressions of GSTM1 and GSTM2 in FTC tissues were correlated with clinical staging, invasion degree and distant metastasis (all P < 0.05), but not with gender, age and tumor diameter (all P>0.05). There was a positive correlation between GSTM1 and GSTM2 proteins expressions in FTC ( r = 0.384, P = 0.004). Conclusions:The expression levels of GSTM1 and GSTM2 in FTC are increased. The interaction between GSTM1 and GSTM2 proteins can be involved in the development and progression of FTC.

Objective: To analyze the current situation and needs of primary and secondary school health clinic services, and to provide a reference for strengthening school health service in China. Methods: Investigation provinces were selected according to China s three major economic zones, 1 or 2 survey centers were selected from each province, 16 provinces and 26 survey centers were selected. In each survey centers, six schools from primary and secondary schools, junior high schools and high schools in urban and rural areas were randomly selected as research sites. Each research site randomly selected 10 students in each grade(grade three, four, five from primary schools) to fill in the questionnaire anonymously. A total of 4 661 valid questionnaires were collected. Results: Among the services provided by the school clinics to students, "trauma treatment" "consulting health problems" "physical examination" accounted for 49.4%, 40.5% and 39.0% respectively. Within the past one year, 45.1% students went to the school clinic for consultation or consultation 1-3 times, 6.4% for 4-5 times, and 3.7% for 6 times or more. When students were sick in school, 65.8%(primary school), 64.0%(junior high school), and 54.4%(high school) of them selected to go to the school clinic. When suddenly suffered trauma in school, 78.2%(primary school), 73.2%(junior high school) and 69.6%(high school) of the students went to the school clinic. Conclusion Primary and middle school students have a great demand for school health services, and it is necessary to continue to strengthen the construction of primary and secondary school health clinics.

Objective: Understanding mental health status of students with learning disabilities in Beijing to provide a basis for mental health promotion of students with learning disabilities. Methods: By means of random cluster sampling, 5 787 enrolled students in grade one and grade two of 11 public junior middle schools in Beijing were selected as the survey subjects. A self designed questionnaire was used to investigate the students’ learning disabilities and mental health status through anonymous self filling. Results: About 11.6% students self reported learning disabilities. The proportions of students with learning difficulty in mathematical reasoning and calculation were higher, 44.1% and 40.7% respectively. The reported rate of mental health problems was 38.3%. The top four of the 10 symptoms were obsessive compulsive symptoms, learning pressure, emotional instability and anxiety(2.19±0.77)(2.17±0.99)(2.09±0.90)(2.07±1.08). Compared with students without learning disabilities, students with self reported learning disabilities had poorer mental health status(OR=1.47), and learning disabilities were related to most factors of mental health. Different types of learning disabilities were associated with different mental health factors. Conclusion Mental health problems of students with learning disabilities are higher than that of students without learning disabilities. It is necessary to strengthen the mental health support for students with learning disabilities and improve their mental health.