AIM: To study the effects of angiotensin Ⅳ(Ang Ⅳ) on growth of cultured neonatal rat cardiomyocytes.METHODS: Cardiomyocytes isolated from neonatal SD rat were cultured in vitro and divided into groups: control DMEM,10~(-6) mol/L Ang Ⅳ, 10~(-5) mol/L Ang Ⅳ.The effects of Ang Ⅳ were assayed as follows: protein synthesis was determined by modified Bradford method,and cell cycle by flow cytometry.RESULTS: Ang Ⅳ promoted protein synthesis(P

Appendicitis ; complications ; Humans ; Infant, Newborn ; Intussusception ; complications

Colectomy ; methods ; Colorectal Neoplasms ; mortality ; pathology ; surgery ; Humans ; Laparoscopy ; Treatment Outcome

Ear Diseases ; congenital ; surgery ; therapy ; Ear, External ; abnormalities ; Ear, Middle ; abnormalities ; Humans

Fistula ; complications ; surgery ; Humans ; Male ; Maxilla ; pathology ; Middle Aged ; Osteomyelitis ; complications ; surgery

Objective To investigate the effect of SM on aquaporin-1(AQP-1) expression in rats with acute lung injury(ALI) induced by lipopolysaccharide(LPS). Method 48 SD rats were randomly divided into normal group,ALI 7-day group,ALI 8-hour group,SM prevention group,SM 7-day treatment group,and SM 8-hour treatment group,8 rats per group. At 8 hours and 7 days after treatment,lung wet to dry weight ratio,lung pathology,electron microscope,AQP-1 immunohistochemistry,and AQP-1 Western blotting were performed. The situation of hemorheology and serum level of PaO2 and Endothelin-1(ET-1) were also detected. Results The model group rats all appeared ALI symptom. Compared with the 7-day ALI group,the degree of lung edema statement alleviated in SM 7-day treatment group. But the expression difference of AQP-1 was not significant between the two groups(P

Objective To investigate the metabolism characteristics and CD34 variance of SD rats models with type 2 diabetes renal injury with high grease feeding and low-dose STZ injection. Methods 60 male SD rats with 4-week old were randomized into two groups:10 in the control group feeding with normal forage,50 in the DM group feeding with high grease forage,which consist of 10% lard,10% glucose,1% cholesterol,2% yolk powder,and 1% sodium cholate adding into the normal feeds. Intravenous injection of STZ after feeding 4 weeks (35 mg/kg). All the rats were tested with OGTT after 10 days and 30 days injection of STZ. Serum insulin was measured by radioimmunoassay (RIA) and immunohistochemistry staining was adopted to observe the positive expression of renal CD34 molecular. Results FBG of rats with diabetes and renal injury was significantly higher than that in the control group (P

Objective To investigate the role of Ca 2+ signaling in the overexpression of detrusor smooth muscle cell connexin 43 by cyclic stretch in vitro. Methods The detrusor smooth muscle cells (DSMC) grown on collagen-coated silicone membranes were subjected to cyclic stretch-relaxation. The Cx43 mRNA in DSMC were detected with RT-PCR, and the concentration of intracellular free Ca 2+ in DSMC was measured by confocal microscopy in conjunction with the calcium indicator, Fura-3 (Molecular Probes). Results The overexpression of Cx43 mRNA induced by cyclic stretch was significantly inhibited by EGTA.The increase of intracellular free Ca 2+ induced by stretch was also inhibited completely by EGTA, 61.95% by GdCl3, 29.98% by Nifedipine, 87.98% by Ryanodine and Thapsigargin. Conclusion The stretch-induced Ca 2+ entry, via the Ca 2+-induced Ca 2+ release mechanism, may play an important role in DSMC connexin 43 overexpression induced by cyclic stretch.

Objective: To study the masticatory muscles activity in the cases with severe tooth wear(TW) and the damaged display of masticatory muscles in different types of occlusal wear. Methods: The electromyography(EMG) of bilateral anterior temporalis(TA), masseter muscle(MM) and anterior digastric(DA) was taken in 15 elder patients aged 49～69 years old with TW, the EMG of the patients was compared with that of 8 healthy subjects aged 49～55 years old. Results: TW patients showed higher activity of TA,MM and DA in mandibular postural position than the controls (P

Objective: To analyze the influence of long-term swimming training on spatial learning-memory in rats and its relationship with cyclic adenosine monophosphate(cAMP) and cyclic guanosine monophosphate(cGMP) signal transduction pathway. Method: After 3 times adaptable swimming exercises (30min each time), 40 male SD rats were divided into 2 groups: control group (CR, n=20) and exercises, group (TR, n=20). CR group didn't swim, and TR group swam without burden (6 times/week, 60 min each time). After 8 weeks training, 10 rats were selected from both groups respectively for examing of Morris water maze test. Radioimmunoassay was used to measure the levels of cAMP and cGMP in hippocampus and prefrontal cortex of rats. Result: ①Compared with CR group, in TR group learning-memory improved in a certain extent: ②Compared with CR group, in TR group, the level of cAMP in hippocampus enhanced very obviously (P＜0.01), the cAMP/cGMP ratio enhanced obviously (P＜0.05); in prefrontal cortex the levels of cAMP and cAMP/cGMP ratio enhanced obviously (P＜0.05). Conclusion: Swimming training for 8 weeks improved the spatial learning-memory of rats in a certain extent, and elevated the level of cAMP and cAMP/cGMP ratio in hippocampus and prefrontal cortex of rats obviously. It is suggested that exercises might affect learning-memory by cAMP and cGMP signal transduction pathway.