Aim To investigate the relationship between oxidative stress and the aortic endothelial cells injury in type 2 diabetes rats,as well as the effect of valsartan. Methods The type 2 diabetic models were induced by low dose of streptozotocin (STZ) with high-energy diet.12 weeks after injecting STZ, rats were randomly divided into three groups: normal control, diabetes control and valsartan (24 mg?kg-1?d-1, 8 weeks, ig.) treated diabetes. At the 12th and 20thweek end, such indices as the endothelium-dependent vasodilation and the shape of aorta endothelium, the serum contents of SOD, GSH-Px , MDA and NO, and the level of NOS gene expression in aorta were measured. Results ① At the 12th weekend,in the diabetes group, the relaxation of aortic rings to low concentration of Ach declined, the aortic endothelial cells intumesced, contents of serum SOD, GSH-Px, MDA and NO significantly increased, the expression of iNOS mRNA in aorta obviously up-regulated while the expression of eNOS mRNA showed no change. ② At the 20th weekend,in the diabetes control group, the dilatory reactivity of aortic rings decreased to each concentration of Ach, the aortic endothelium appeared degenerative and necrotic, activities of SOD and GSH-Px decreased as well as the content of NO, the content of MDA increased continuously, and the iNOS mRNA expression up-regulated while eNOSmRNA expression down-regulated. Valsartan could regress the aggravation and improve contents of serum SOD, GSH-Px, MDA, NO and NOS mRNA of the aorta. Conclusion The oxidative stress and abnormality of NO participate the process of aortic endothelial cell injury. Valsartan plays a protective role partially through enhancing antioxidation effect and adjusting NO production.

Objective To study the influence of different time of lavipeditum with traditional Chinese medicine on recovery of gastrointestinal function right after cesarean section, to find the best lavipeditum time and improve the therapeutic effect of lavipeditum with traditional Chinese medicine. Methods 388 cases parturents after cesarean section were selected and were randomly divided into the observation group(200 cases)and the control group(188 cases)according to their bed number. The observation group began lavipeditum with Chinese medicine 6 hours after operation, and was scheduled 7:00-8:00 in the morning, 21:00-22:00 in the evening, lasted 20 minutes every time for consecutive 3 to 5 days. the control group started lavipeditum with Chinese medicine one day after operation, and continued lavipeditum any time they wanted. lasted 20 minutes every time for consecutive 3 to 5 days. Recovery of intestinal function were com-pared between the two groups. Results Postoperative recovery time of bowel sounds, anal exhaust time for the first time, the first defecation time, appetite and sleep quality three days after operation in the observation group were beuer compared with the control group. Conclusions Timing of lavipeditum with Chinese medicine is more effective for recovery of gastrointestinal function after cesarean section, it embodies the importance of time medicine and reach best aims.

Drug Resistance, Multiple ; Drug Resistance, Neoplasm ; Humans ; Medicine, Chinese Traditional ; methods ; Neoplasms

Acute Disease ; Chromates ; poisoning ; Humans ; Male ; Occupational Diseases ; Young Adult

Objective To investigate the effect of metformin on the proliferation and apoptosis in human pancreatic cancer cell line CFPAC-1,and to explore the potential mechanism.Methods Human pancreatic cancer CFPAC-1 cells were cultured in vitro,and were treated with metformin at different concentrations (1,2.5,5,10,20,40,60 mmol/L) for different durations (24 h,48 h and 72 h),and cells without treatment were considered as control group.Cell proliferation was evaluated by CCK-8,cell cycle was determined by flow cytometry,apoptosis was determined by Annexin V/PI double staining method,and Western blot was used to detect the protein expression of p-AMPK,FAS,cyclin D1,Bcl-xl,Bax,caspase-3 and survivin.Results Metformin could inhibit the proliferation of CFPAC-1 cells in a time and dose dependent manner.Forty-eight hours after 40 mmol/L metformin treatment,the proportion of CFPAC-1 cells in phase G0/G1 was significantly increased [(65.93 ± 0.27)％ vs (42.89± 1.02)％],and the proportion of CFPAC-1 cells in phase G2/M,S was significantly decreased [(22.01 ± 2.95) ％ vs (38.28 ± 4.93) ％,(13.58±0.43)％ vs (20.12 ± 3.38)％],and the difference between the two groups was statistically significant (P ＜0.05).The apoptosis rate was increased from (3.01 ± 0.49) ％ to (32.97 ± 3.19) ％,(P ＜ 0.05) ; and the expression of p-AMPK,Bax,and caspase-3 was increased,while the expression of FAS,cyclin D1,Bcl-xl,survivin were decreased.Conclusions Metformin can inhibit proliferation and promote apoptosis of CFPAC-1 cells mainly by activation of AMPK pathway,and down-regulation of FAS,cyclin D1,survivin and Bcl xl/Bax ratio,as well as up-regulation of caspase-3.

AIM: To investigate the alteration of the vascular response to contracting material and the endothelium dependent vascular relaxation (EDVR) at different stages of type Ⅱ diabetes rats. METHODS: Type Ⅱ diabetes rat model was established by high-energy diet and lower dose of STZ. At 12th and 20th weekends after injecting STZ, the vascular reactivities to phenylephrine (PHE) and KCl and the EDVR induced by Ach were measured respectively in the isolated aorta rings. RESULTS: At 12th weekend after injecting STZ, the response to PHE increased, the reactivity to KCl kept unchanged, and the EDVR was damaged lightly. But at the 20 th weekend after injecting STZ, the response to PHE increased further and the reactivity to KCl markedly reinforced, and the EDVR was obviously damaged. CONCLUSION: The response of great vessels to contracting material increased, but the EDVR attenuated at different stages of type Ⅱ diabetes rats. These changes are further reinforced along with the developing of disease duration.

AIM: To study the effects of Ginseng fiber on hepatic fibrosis induced by CCl 4 in mice. METHODS: Forty PCR Mice were randomly divided into 4 the control group, the NS group, the colchicine group and the Ginseng fiber groups. Rats in control group were treated by daily oral gavage with vehicle. Rats in other three groups were given SC injection of 40% CCl 4 10 ml?kg -1 and treated by either daily oral gavage with vehicle, or colchicine at 0.1 ml?kg -1, or Ginseng fiber at 10 g?kg -1 for 42 d. The liver injury indexes were measured. RESULTS: Compared with control group, the serum enzymes of alanine aminotransferase (ALT), aspartic acid aminotransferase(AST) were markedly increased but serum albumin (Alb) and A/G were decreased distinctly in CCl 4 group whose liver slides also showed typical liver cirrhosis. Ginseng fiber markedly prevented CCl 4-induced increases in liver weight, serum ALT and TP. Ginseng fiber lightened the hepatic pathological necrosis resulting from CCl 4. The preventive effect of Ginseng fiber was identical to that of colchicine. CONCLUSION: Ginseng fiber can prevent hepatic fibrosis induced by CCl 4 in mice.

AIM: To observe the changes of bone in female Sprague Dawley rats aged 4.5 and 7.5 months. METHODS: Forty 4 month old virgin female Sprague Dawley rats were randomly divided into 4.5 month group and 7.5 month group. Bone histomorphometric analysis of the proximal tibial metaphysis (PTM), tibial shaft (Tx) and the fifth lumbar vertebral body (LV5) was performed in undecalcified sections. RESULTS: There was no significant change in bone volume of PTM, LV5 and Tx between 4.5 and 7.5 months of age. However, the bone formation parameters (%L.Pm, MAR, BFR/TV, BFR/BV, BFR/BS) of LV5 and Tx fall rapidly between 4.5 and 7.5 months of age. CONCLUSION: There is no significant change in cancellous and cortical bone mass, but the bone formation of LV5 and Tx decreases in female Sprague Dawley rats aged from 4.5 to 7.5 months.

Objective To investigate the effects of stellate ganglion block (SGB) on brain injury in patients undergoing cardiac valve replacement under cardiopulmonary bypass (CPB). Methods Forty ASA Ⅱ or Ⅲ patients of both sexes aged 22-50 yr weighing 40-64 kg undergoing elective cardiac valve replacement were randomly divided into 2 groups (n = 20 each): control group (group C) and SGB group. Radial artery and right internal jugular vein were cannulated for BP and CVP monitoring. A catheter was inserted into left internal jugular vein under local anesthesia and advanced cephalad until resistance was met for blood sampling. Right SGB was performed with 0.25% ropivacaine 10 ml. Successful block was confirmed by ipsilateral Homer's syndrome.ECG, BP, CVP and SpO2 were monitored. Anesthesia was induced with midazolam 0.2 mg/kg, fentanyl 5-8 μg/kg and vecuronium 0.12 mg/kg and maintained with fentanyl infusion at 8-10 μg· kg- 1· h- 1 and intermittent iv boluses of midazolam and vecuronium. Blood samples were collected for determination of plasma NO, ET-1, S100β protein and NSE concentrations and NOS activity immediately after left internal jugular vein was retrogradely catheterized (T0 ), at 30 min of CPB (T1), 10 min after release of aortic cross clamp (T2 ), 6 and 24 h after operation (T3 ,T4 ). The patients' cognitive function was assessed by using mini-mental state examination (MMSE) the day before operation and on 1st and 7th day after operation. Results The plasma ET-1, S100β protein and NSE concentrations were significantly increased during and after operation at T1-3 as compared with baseline values at T0 in both groups and were significantly lower in group SGB than in group C. Plasma NO concentration was significantly increased during CPB at T1 as compared with the baseline at T0 in both groups but was significant higher after CPB at T2 but lower after operation at T3,4 in gToup SGB than in group C. The NOS activity was significantly higher during operation at T1,2 in group SGB than in group C. The cognitive function was significantly better at 1st postoperative day in group SGB than in group C. Compared with the baseline value,NO/ET-1 ratio was significantly decreased during and after operation in group C,but no significant change in NO/ET-1 ratio was found in group SGB. Conclusion SGB can attenuate brain injury induced by CPB by improving cerebral perfusion through maintenance of relative balance of NO/ET-1.