Aim Tostudytheeffectof4-phenlybuty-rate acid(4-PBA) on the heart function of diabetic rats and to explore its underlying mechanism. Methods MaleSprague-Dawley(SD)ratsweredividedintothree groups randomly: ( 1 ) control rats;( 2 ) diabetic rats;(3) 4-PBA treated diabetic rats. Type 1 diabetic mod-el was induced by single intraperitoneal injection of strepotozotocin (60 mg·kg-1 ) . After five weeks dia-betic model was established, diabetic rats were treated with 4-PBA by P. O at the dose of 1 g·kg-1 per day for 20 weeks. At the end of the experiment, hemody-namics of the left ventricle and main artery were detec-ted through right carotid artery cannulation in rats. The level of blood glucose, the activity of superoxide dis-mutase( SOD) and nitric oxide synthetase ( NOS) and the content of malondialdehyde ( MDA ) and nitric ox-ide( NO) of serum and myocardial tissue in rats were measuredbycolorimetry.Results Thetreatmentof4-PBA had no effect on blood glucose, the weight of body and heart, but slightly increased systolic and diastolic pressure of artery, heart rate, systolic pressure of left ventricular, maximum increase rate and minimum de-crease rate of left ventricular pressure( ± dp/dt) in di-abetic rats. It also slightly decreased diastolic pressure of left ventricular, shortened diastolic duration of left ventricular ( P > 0. 05 ) . Moreover, it significantly shortened relaxation time of left ventricular in diabetic rats (P<0. 05). In addition, the treatment of 4-PBA obviously enhanced the activity of SOD and NOS, NO content, and reduced the content of MDA in serum and heartofdiabeticrats(P<0.05).Conclusion 4-PBA has a potential protective effect on heart function in diabetic rats, which is achieved by ameliorating he-modynamics and significantly improving diastolic dys-function in diabetic rats. The underlying mechanism may be related to the inhibition of oxidative stress and promoting the genesis of NO in myocardial tissue.

AIM: To construct a recombinant adenovirus vector which regulated expression of mouse transforming growth factor beta (TGF-?1). METHODS: Total RNA was extracted from Balb/c mice spleen pre-treated with Con A to clone TGF-?1. pTRE-shuttle vector was used as mediator to ligate TGF-?1 gene and the backbone of the replication-incompetent adenoviral vector. The constructed recombinant adenovirus contains tetracycline-responsive element which can regulate the expression of inserted genes. Identifying the desired recombinant adenovirus, it was packaged in HEK 293 cells. Supernatant of high titer adenovirus was collected to detect the TGF-?1 gene expression by ELISA kit. RESULTS: The constructed recombinant adenovirus had been identified by restriction endonucleases cutting, sequencing and PCR. In the supernatant of infected cells, it expressed the mice TGF-?1 in high concentration to 91.16 ng/L. CONCLUSION: The mice TGF-?1 recombinant adenovirus has been built which make a basis for further research and use in gene therapy.

The problems to offer HIS course in plateau medical colleges and universities were pointed out and corresponding reform measures were put forward in view of the requirement for medical professionals in the 21stcentury information society and the current situation in HIS course teaching.

Objective To investigate the effects of cold exposure with different time courses on cardiovascular function and skeletal muscle contraction in Sprague-Dawley (SD) rats.Methods The male SD rats were randomly divided into control,12-h cold,24-h cold,and 48-h cold groups.The rats in all cold group were maintained in 4 ℃ environment for indicated time and allowed free access to standard rat chow and water ad libitum.After the animal model was established,the heart,thoracic aorta,soleus,and extensor digitorum longus (EDL) were rapidly isolated from rats under anesthesia and then fixed into the respective organ perfusion system that was connected to physiological recorders and data acquisition system.Lanendorff heart persusion was used to detect some parameters of cardiac function,such as coronary flow (CF),mean left ventricular systolic pressure (mLVSP),mean left ventricular diastolic pressure (mLVDP) and maximum ascending and declining rate of left ventricular pressure (± dp/dt max) ; and then the heart was suffered from 30 min ischemia followed by 60 min reperfusion,the changes of above cardiac function indexes were recorded again.Organ bath method was employed to detect contraction response to potassium chloride (KCl) or phenylephrine (PE) and endothelium-dependent relation responses to acetylcholine (ACh) of aortic rings.The twitch tension,titanic tension,and fatigue test of soleus and EDL were examined by electrical stimulation to reflect contractive function of skeletal muscle.Results The coronary flow (CF) were significantly reduced in 24-h and 48-h cold groups compared to control group [(9.0 ± 1.7) ml/g and (9.8 ± 1.3) ml/g vs (11.6 ± 1.2) ml/g,P ＜ 0.05] ; 48-h cold exposure also showed significantly increased mLVSP (P ＜0.01) and mLVP (P ＜ 0.05) of rats.After ischemia-reperfusion,the heart re-beat time was shorter in all cold exposure groups (all P ＜ 0.01),mLVP and mLVDP were higher in 24-h and 48-h cold group than control group (all P ＜ 0.01).The contraction of aortic rings responses to 60 mmol/L KCl [(0.63 ±0.13) g and (0.79 ±0.11)g vs (1.28±0.17)g,P ＜0.01] and 1 μmol/L PE [(0.62 ±0.18)g and (0.68 ±0.13)g vs (1.25 ± 0.18)g,P ＜ 0.01] were decreased while the endothelium-dependent relaxation responses to low concentration ACh (3 × 10-8 ～ 3 × 10-7) were increased in 24-h and 48-h cold groups relative to control group (all P ＜ 0.05).The 48-h cold also reduced titanic tension of SOL and EDL in comparison with control [(4.14 ± 0.62) N/cm2 vs (5.50 ± 0.75) N/cm2,P ＜ 0.05 and (3.00 ± 0.57) N/ cm2 vs (4.70 ± 0.85) N/cm2,P ＜ 0.01].Conclusions 24 ～ 48 h cold exposure could reduce CF but enhance the tolerance of heart from rats to ischemia reperfusion injury and also decrease the contraction of aortic rings response to KCl or PE but increase the sensitive responses to ACh of aortic rings from rats.The 48-h cold could decrease the contraction of skeletal muscle elicited by electrical stimulation.

Objective To investigate the effects of fasting with different time courses on the contraction of skeletal muscle and cardiovascular function in Sprague-Dawley (SD) rats.Methods The healthy and male SD rats were randomly divided into (1) control,(2) 12 h fasting,(3) 24 h fasting,and (4) 48 h fasting groups.After animal models of fasting with different time courses were established,the heart,thoracic aorta,soleus,and extensor digitorum longus (EDL) were rapidly isolated from rats under anesthesia and then fixed into the respective organ perfusion system that was connected to physiological recorders and data acquisition system.Langendorff heart perfusion was used to detect some parameters of cardiac function,including left ventricular systolic pressure (LVSP),left ventricular end-diastolic pressure (LVEDP),and maximum ascending and declining rate of left ventricular pressure (± dP/dt max).Then,the heart was suffered from 30 min ischemia followed by 60 min reperfusion,the changes in above cardiac function parameters were recorded again.The contraction response to potassium chloride or phenylephrine and endothelium-dependent relation responses to acetylcholine (ACh) of aortic rings were measured with organ bath.The changes of twitch tension and titanic tension of soleus and EDL were examined to reflect contractive function of skeletal muscle.Results The + dP/dt max was significantly reduced in 24 h and 48 h fasting groups compared to the control (P ＜ 0.01).After ischemia-reperfusion,the heart re-beat time was significantly longer [(24.3 ± 7.0)min vs (14.0 ± 2.9)min,P ＜0.05],both mLVDP and mLVP were significantly higher in 48 h and 24 h fasting groups than control group (P ＜ 0.05),and those changes did not normalized until re-perfusion 60 min.The 48 h fasting increased significantly endothelium-dependent relaxation of aortic rings response to low concentration acetylcholine (P ＜ 0.05),but did not affect the maximum relaxation of aortic rings response to high concentration acetylcholine and contraction of aortic rings responses to potassium chloride and phenylephrine.The 48 h fasting also enhanced significantly titanic tension of soleus compared to the control [(7.01 ± 1.22) N/cm2 vs (5.5 ± 0.75) N/cm2 for48 h-Fasting vs Control,P ＜0.05].Conclusions The 24 ～48 h fasting may induce inhibition of cardiac function,while fasting 48 h can increase the sensitivity of aortic rings responses to ACh and contraction function of soleus in healthy and male rats.

Objective To investigate the effect of the stage-change model on the behavior changes of patients with non-insulin dependent diabetes mellitus (NIDDM). Methods A total of 169 cases NID-DM patients were randomly divided into the control group (84 cases )and the experimental group(85 cases ).The regular health education for the self behavior changes was carried out among patients in the control group,while besides the regular health education conducted in the control group,the stage- change model was additionally used in patients of the experimental group.By virtue of the self-design questionnaire,the surveys were performed on 2 groups respectively before the implementation,6 months and 12 months after the implementation.The behavior stages and behavior changes for the patients in 2 groups were compared. Results The end period of stage behavior and behavior change for patients in the experimental group were obviously better than those in the control group. Conclusions The stage-change model could accelerate the behavior change of patients with non-insulin dependent diabetes mellitus.

Acute Disease ; Dermatitis ; Humans ; Hydrazines ; Hypersensitivity ; Nervous System Diseases ; Poisoning

Objective To study the Mycoplasma pneumoniae infection in the clinical characteristics and treatment methods. Methods From June 2008 to December 2009,49 cases of Mycoplasma pneumoniae infection in patients with clinical data were retrospectively analyzed and summarized. Results 49 cases of children were diagnosed with acute upper respiratory tract infection in 13 cases(26.5% ) ,acute bronchitis 21 cases(42.9%) ,bronchial pneumonia, 15 cases( 30.6% ). Azithromycin alone treatment group,24 cases cured 22 cases ,2 cases improved, the cure rate of 91.7% ;erythromycin and azithromycin infusion + oral sequential treatment group,25 cases recovered,21cases improved,4 cases,the cure rate was 84%. Compared with the two groups,difference was not statistically significant(P ＞ 0.05). All patients were treated in our hospital with average of 13.8d,follow-up period without recurrence.Conclusion Mycoplasma pneumoniae infection in large differences in clinical manifestations, early diagnosis and treatment should be carried out. Azithromycin in the treatment effect was good, a short course of treatment could be used as treatment of Mycoplasma pneumoniae infection.

Objective To investigate the clinical features of infantile diarrhea with intussusception,improve the level of diagnosis and treatment,reduce the misdiagnosis and delayed treatment.Methods The clinical data of 23 cases with infantile intussusception were retrospectively analyzed.Results Twenty-three cases of children with diarrhea symptoms at the beginning of the disease had different degree,12 cases characterized by vomiting,diarrhea,fever and other symptoms of acute gastroenteritis,5 cases stool were mucous pus blood,6 cases for blood in the stool.Five cases were confirmed within 24 h of the diagnosis (3 cases with air enema reduction of intussusception,2 cases with manual reduction),11 cases were confirmed at 24 h to 3 d of the diagnosis and operated,7 cases were confirmed more than 3 d of the diagnosis and operated.Except 1 cases was died from shock,22 cases were cured.Conclusion Infantile intussusception atypical symptoms,illness development is rapid,in critical condition,easy misdiagnosis,missed diagnosis,should actively improve the standard of diagnosis.,early diagnosis,so as not to delay treatment.

AIM:To investigate the influence of calorie restriction ( CR) on contractility and mitochondrial bi-osynthesis in different types of rat skeletal muscles .METHODS:CR rat model was set up by feeding 60%normal food in-take of control rat every day for 8 weeks.Soleus (SOL) and extensor digitorum longus (EDL) were isolated under anesthe-sia.The twitch tension, titanic tension and fatigue resistance of SOL and EDL in response to electrical stimulation were measured to reflect the contractile function of the muscles .The copy number ratio of mitochondrial gene cytochrome C oxi-dase subunit I ( COX I) to nuclear gene β-actin was determined to evaluate the mitochondrial biosynthesis .ATP content was measured to mirror mitochondrial function .RESULTS:Compared with control group , CR for 8 weeks significantly in-creased twitch tension and titanic tension of both SOL and EDL , but only improved fatigue resistance in SOL .Markedly in-crease in ATP content in both skeletal muscles by CR intervention was observed , especially in SOL .Although CR activated AMP-activated protein kinase (AMPK) in both 2 muscles, up-regulation of mitochondrial biosynthesis and transcription of mitochondrial regulatory genes peroxisome proliferator-activated receptor γcoactivator 1α( PGC-1α) and nuclear respirato-ry factor ( NRF) was only observed in SOL .CONCLUSION:CR for 8 weeks enhanced the contractility of both rat SOL and EDL in response to electrical stimulation , especially in SOL composed of slow-twitch fibers.The mechanisms may be related to the activation of AMPK and the promotion of mitochondrial biosynthesis in SOL .