Effect of TRPV4 on angiotensin II-induced renal injury in mice / 中国比较医学杂志

Objective This study was designed to determine the effect of transient receptor potential vanilloid type 4(TRPV4)on angiotensin Ⅱ(Ang Ⅱ)-induced renal injury in TRPV4-null mutant(TRPV4 -/-)mice. Methods The mice were divided into sham group and Ang Ⅱ-treated group. Ang Ⅱ was infused systemically into wild type(WT)and TRPV4 -/- mice via a miniosmotic pump for 4 weeks, and the sham mice were given with normal saline. Systolic blood pressure,urinary excretion of albumin and 8-isoprostane, serum creatinine, and the pathological changes in the kidney tissues were assayed after the 4-week treatment. Results Compared with corresponding sham mice,Ang Ⅱ infusion led to enhanced systolic blood pressure,increased urinary excretion of albumin and 8-isoprostane,increased serum creatinine(P< 0.05),and enhanced glomerulosclerosis degree and renal tubulointerstitial injury index(P< 0.05)in the WT and TRPV4 -/- mice. The result were associated with enhanced collagen levels in the kidney(P< 0.05). All of them were attenuated by the deletion of TRPV4 in the absence of alteration in blood pressure(P< 0.05). Conclusions Deletion of TRPV4 could alleviate renal injury during Ang Ⅱ-induced hypertension, suggesting that TRPV4 may contribute to the pathophysiology of angiotensin Ⅱ-induced renal injury.

Research progress of medical therapies for chronic myeloid leukemia / 中国生化药物杂志

Chronic myeloid leukemia(CML)is a pluripotent stem cell disease characterized by the proliferation of myeloid cell.Ph chromosome has been found in 95% of CML patients.BCR-ABL fusion protein expressing on Ph chromosome displayed constitutive tyrosine kinase activity.The fusion protein could phosphorylate and activate downstream substrates continually in the process of cell signal transduction,and then cells proliferate and migrate constantly,resulting the occurrence of CML.In recent years, people have been tried various methods to cure CML, which included developing some chemotherapy drugs and herbal extracts,as well as designing and synthesizing the inhibitors targeting BCR-ABL tyrosine kinase.Clinical studies showed that these drugs have been achieved remarkable effects.This paple aimed to review for drugs treated in CML.

Isolation, purification and activity identification of ABL tyrosine kinase and ABLT315I mutant / 中国生化药物杂志

Objective To establish a simple , stableand effective method for the isolation and purification of ABL tyrosine kinase and its mutant ABLT315I.Methods pET-28a vector was inserted in abl gene or its site directed mutagenesis.Then Escherichia coli BL21 competent cells were co-transformed with pGEX6P-1-ptp-1b and pET28a-abl/pET28a-ablc944t .The transformed BL21 cells were incubated, and then were stimulated with Isopropyl-β-D-thiogala-ctopyranoside ( IPTG ) to express ABL tyrosine kinase and its mutant .The ABL tyrosine kinase and its mutant was purified by affinity chromatography and gel filtration chromatography .SDS-PAGE was used to detect the purity and relative molecular weight of ABL tyrosine kinase and its mutant.BCA method was used to determine the concentration of ABL tyrosine kinase and its mutant .Finally, kinase activity of target protein was examined by ATP /NADH coupling method .ResuIts SDS-PAGE showed the high purity of ABL tyrosine kinase and its mutant.The concentration of ABL and ABLT 315I protein was reached 28mg/L of LB and 20mg/L of LB, respectively.Both of the target protein was measured to have good tyrosine kinase activity in vitro .ConcIusion A simple, stable and effective method for the isolation and purification of ABL tyrosine kinase and its mutant was found successfully in the study , which laying good foundation for High Throughput Drug Screening and structure analysis of protein subsequently .

Correlation of Cerebral Blood Flow with Memory in Patients with Cerebral Infarction / 中国临床心理学杂志

Objective:To investigate the relation of cerebral blood flow(CBF) and memory in patients with cerebral infarction. Methods:The cerebral blood flow of 30 patients with cerebral infarction and 20 healthy controls was measured. The WMS was used for memory function assessment. Results: CBF and memory performance in patients group were lower than those of controls. There was a statistically significant correlation between CBF and memory performances. Conclusion: The decreasing of CBF was an important causal factor to the memory dysfunction in cerebral infarction patients.