Akt is the downstream target protein of phosphatidylinositol 3-kinase(PI3K),and PI3K/Akt signaling pathway is involved in cell proliferation,differentiation,apoptosis and metabolism.The activities of Akt in the central nervous system is also regulated by the neurotransmitter dopamine(DA),therefore Akt mediates multiple drug addiction process.This article reviews the structural characteristics and activity regulation of Akt,as well as the related research in drug addiction of this signal molecule.

Intracellular [Ca+ + ]i was examined using Quin-2. Resting [Ca+ + ]i in platelets loaded with Quin-2 in media containing either 1 mmol/L CaCl2. or 2 mmol/L EGTA was 52.1?5.2nmol/L, 28.4+5.1 nmol/L, respectively. The concentration of external calcium appears to play an important role in cytosolic Cat++ hemeostasis in platelets. Stimulation with A2 3187( 25nmol/L ) caused [Ca++]i to peak at 145?30.8 nmol/L in the presense of extracellular 1mmol/L CaCl2 and 34.4?2.4 nmol/L after addition of 2 mmol/L EGTA. These data suggested that the most of this rise results from calcium entry across the plasma membrane, with a small contribution to the discharge of intracellular pool of Ca++.Anisodamine ( 100?mol/L ) had no effects on resting [Ca + + ]i and A23187-evoked [Ca++]i level in the absence of CaCl2, Anisodamine ( 100?mol/L, 25?mol/L), verapamil ( 10?mol/L ) decreased the A23187 -evoked [Ca++ ]i rises in the presence of CaCl2 by 38%, 34%, 25%, respectively. These results provided a mechanism for the calcium antagonistic effects of Anisodamine.

Daphnetin, isolated from Daphne koreane Nakai, has been reported to dilate blood vesse ls, inhibit thrombosis and have antiinflammatory effect. In this study, type Ⅰ and type Ⅱ protcin kinase A partially purified from rat skeletal muscle and protein kinase C from rat brain were incubated with varying concentrations of daphnetin. Type Ⅱ protein kinase A was siguificantly inhibited by daphnetin at the concentration of 0.0056?mol/L, while type Ⅰ protein kinase A and protein kinasc C were inhibitcd at the concentrations of 5.6?mol／L and 56 ?mol/L, respectively. The results indicated that daphnetin might be used as a specific inhibitor of type Ⅱ protein kinase A

Basic and cIinicaI studies demonstrate that depression is associated with abnormaI neuraI pIasticity in some brain regions,incIuding the prefrontaI cortex and hippocampus. Brain-derived neurotro-phic factor(BDNF)and its signaIing pathways pIay a cruciaI roIe in reguIating neuraI pIasticity and deveI-opment of depression. Ketamine or scopoIamine can produce a quick and sustained antidepressant effect,and both can quictIy activate BDNF-signaIing pathways reIated to neuraI pIasticity. In order to pro-vide the theoreticaI basis for future researches on new antidepressants,the neuraI pIasticity mechanisms of faster-onset antidepressants are reviewed in this paper.

[Objective]To explore the value of different surgical methods in the treatment of the displaced femoral neck fracture in the elderly.[Method]A follow up study was done on 95 cases older than 65 years who were treated with internal fixation,femoral head arthroplasty and total hip joint replacement from 2003 to 2008.The differenee upon operation time,blood loss,duration of hospitalization,joint function evaluation one and two years after operation,complications and reoperation rate were compared.[Result]The internal fixation group had the shortest operation time and hospitalization and the least blood loss but the highest immobilization time,highest co-mplication rate and reoperation rate as we1l as the worst joint function.While the total hip joint repl acement group had the least immobilization time,the lowest compliction rate and reoperation rate,best joint function but required better health condition.The femoral head arthroplasty group had the least operation injury but had relative higher reoperation rate and worse joint function compared to the total hip joint replacement group.[Conclusion]Prosthetic replacement is reliable to treat femoral neck fractures in the elderly.

Glenohumeral subluxation is one of the most frequent complications in patients with post-stroke hemiplegia. This paper reviewed the recent advances in research on post-stroke Glenohumeral subluxation from the epidemiology, pathogenesis and related factors, diagnosis,treatment and so on.

Objective To study the distribution and drug resistance of pathogens in neonatal septicemia in order to provide clinical guidance for antibiotic usage.Methods This retrospective study analyzed blood culture and clinical data from 83 confirmed neonatal septicemia patients and the blood collection cultures were analyzed.Results A total of 84 strains were isolated from 83 cases of blood specimens,Gram positive bacteria,Gram negative bacteria and fungi were 38(45.2%),41(48.8%),5(6.0%),respectively.Gram positive bacteria was mainly coagulase negative staphylococcus and staphylococcus aureus,which were 13(15.5%) and 8(9.5%) respectively.Gram negative bacteria was mainly Escherichia coli and Klebsiella pneumonia,which were 25(29.8%) and 9(10.7%) respectively.Gram positive bacteria were found high resistance to penicillin G,amoxicillin clavulanate potassium,oxacillin and clindamycin,from 34.2% to 73.7%,but they were sensitive to vancomycin,teicoplanin and linezolid.Gram negative bacteria were found high resistance to ampicillin(82.9%),the constituent ratio of the extended spectrum βlactamases(ESBLs) was 34.1%,carbapenem resistant strains was not found.All fungi were sensitive to azoles.Conclusion Gram negative bacteria are the major pathogens in neonatal septicemia,with high infection rate of Escherichia coli and high constituent ratio of the ESBLs,and antimicrobial agents should be chosen according to blood culture and antimicrobial susceptibility results.

Objective To study the expression of TGF-?1 and CTGF and the prevention effects of leflunomide in diabetic nephropathy rats,and to study the mechanism of curing DN of leflunomide.Methods Thirty-six male Wistar rats were randomly divided into three groups : control group,diabetic model group,diabetes treated with leflunomide group.After being removed the right renal of rats,diabetic model was created by injecting STZ(40mg/kg),while control group received identical volum of citrate buffer solution.When the model was established,rats in the leflunomide-treated group were daily garvage of leflunomide(5mg/kg).The same capacity saline was given to control group and diabetic model group.24-hour urine volume and 24-hour urine protein were determined after eight and twelve weeks,as well as serum creatinine and urea nitrogen.The kidney sections were studied for pathological changes with light microscopy.The expression of TGF-?1 and CTGF was determined by immunohistochemistry respectively.Results With the course extending,immunohistochemistry analysis showed that the expression of TGF-?1 and CTGF increased significantly in DN group,as compared with control group,while TGF-?1 and CTGF reduced in diabetes treated with leflunomide group(P

Objective To study the effects of complex polysaccharides immune milk (CPIM) on cellular and humoral immune functions in mice. Method Sixty ICR mice were divided into five experimental groups and a control group. The mice in experimental groups were given i.p. Ganoderma lucidum polysaccharide (GLP) immune milk,Lycium barbarum polysaccharides (LBP) immune milk and different doses (low,medium and high) CPIM,and the control group was given equivalently skimmed and sterilized goat's milk respectively for 15 d. The cellular and humoral immune functions and the feces were examined. Results Transformation ability of spleen lymphocytes:There were highly marked differences between all experimental groups and control group,between medium dose group of CPIM and GLB group,LBP group (P

Objective To investigate the apoptosis effect of ischemic postconditioning on levels of IL-6 and ATP during renal ischemia/reperfusion injury in obstructive jaundice rats. Methods One hundred SD rats were randomly divided into 5 groups: the Sham control group , I/R group , OJ-Sham group , OJ-I/R group , and OJ- I/R+IPO group, with 20 cases in each group. According to the time after ischemia/reperfusion, each group was divided into four subgroups (n = 5), with reperfusion time of 0 h, 1 h, 3 h, 6 h, respectively. After 1 week of biliary obstruction , rats were sacrificed at 0 h , 1 h , 3 h , 6 h post-I/R , and the left kidneys were taken, renal tissue was used for determination of the levels of interleukin-6 (IL-6) and adenosinetriphosphate (ATP). Results Compared with the OJ-I/R group, the serum level of BUN,Cr decreased significantly in the OJ-I/R-IPO group (P < 0.05). Conclusion Ischemic postconditioning can reduce the injury of kidney ischemia-reperfusion in OJ rais , which may be related to the reduced inflammation reaction and the energy metabolism in the kidney.