ATP sensitive potassium channel(K ATP has been indentified in a variety of tissues and recognized as an important drug target.K ATP channels is composed with a 4∶4 stoichiometry of an inwardly rectifying K + channel(Kir) subunit plus a sulfonylurea receptor(SUR).The characteristics for the SUB2B/Kir 6 1 in vascular are small condutance,ATP insensitivity and activation by added NDP.Therefore,it is refered as NDP dependent K + channel(K NDP ).A lot of endogenous and exogenous vasodilators seem to act through a common pathway by opening K ATP in vascular,which is involved in protein kinase A and C signal transduction pathway.Vascular shows different sensitivity to potassium channel openers(KCO),and the mechanism remains to be determined.In this review,a summary of K ATP in vascular is presented with molecular structure,KCO selectivity to tissue,signal pathway,electrophysiological and pharmacological properties.

Atherosclerosis ; immunology ; Dendritic Cells ; immunology ; Humans

Objective To investigate the changs of serum and urine vascular endothelial growth factor(VEGF) in children with steroid-sensitive nephrotic syndrome(SSNS) at their active and remission stage.Methods Serum and morning urine levels of VEGF were assayed by Liquichip in 30 patients with SSNS at the active and remission stage and 30 normal age-and sex-matched controls.Results Serum levels of VEGF in patients at the active stage [(186.62?106.21) ng/L] were significantly higher those that at the remission stage [(118.75?73.08) ng/L] and than those in control group [(108.64?54.75) ng/L](P0.05).Morning urine levels of VEGF in patients at the active stage [(201.66?100.46) ng/L] were significantly higher than those at the remission stage [(116.35?55.99) ng/L] and than those in control group [(99.94?42.07) ng/L](P0.05).Conclusions Serum and morning urine levels of VEGF are significantly elevated in patients with SSNS,however they are significantly lower after the treatment of steroid.There is no obvious difference between the patients at the remission stage and healthy controls.VEGF involves pathogenetically and physiologically in SSNS during its onset and growth.

Blood Vessels ; physiology ; Humans ; Kruppel-Like Transcription Factors ; metabolism ; physiology

Cardiovascular Diseases ; etiology ; prevention & control ; Disasters ; Earthquakes ; Humans

Aged ; Anthracosis ; complications ; Catheterization ; Drainage ; methods ; Humans ; Male ; Middle Aged ; Pleural Effusion ; etiology ; therapy ; Pneumothorax ; etiology ; therapy ; Retrospective Studies

Objective To investigate the relationship between flow-mediated dilatation of the brachial artery(FMD) and cardiovascular risk factors as well as target organ damage in elder patients with isolated systolic hypertension(ISH).Methods Ninety patients with ISH were divided into two groups: ISH group(n=51) and ISH with hyperlipidemia group(n=39).Color Doppler ultrasound for FMD was performed on all the patients,and carotid artery ultrasound and cardiac ultrasound were also conducted. Results Patiens with hyperlipidemia had lower FMD than those of ISH group(P=0.021).It was revealed by univariate analysis that FMD was negatively related to systolic blood pressure,carotid intima-media thickness and total cholesterol(P

Objective To investigate the effect of astilbin on expression of CTLA-4 in activated T cells of mouse heart transplantation model with acute rejection.Methods Cardiomyocytes of BALB/ c mouse and spleen cells of C57BL/6 mouse were separated.The cardiomyocytes(2?10~5/ml)as irri- tation cells and spleen cells(1?10~6/ml)as responsers were mixed and cultured.The model of mouse heart transplantation with acute rejection in vitro was established.Three groups were set up:control group,Astilbin(15/?g/ml) group,Astilbin+anti-CTLA-4 mAb 9H10 (30?g/ml)group.Apoptosis of T cells was observed by TUNEL.The expression of CTLA-4 in activated T cells was detected by RT-PCR and Western blot.Results Apoptosis indexes of activated T cells in Astilbin group were sig- nificantly higher than those in the control group(73.4%?12.5% vs 35.1%?9.2%,P＜0.01). The expression of CTLA-4 in Astilbin group was significantly higher than control group(P＜0.01), but there was no apparently difference between control group and Astilbin+CTLA-4 mAb group(P＞0.05).Conclusion Astilbin induces apoptosis of activated T cells in heart transplantation,which may be partially related to its enhanced expression of CTLA-4.

Objective To study the effects of continuous oxygenated blood microperfusion on rat hearts preservation.Methods Forty-five Wistar rats were randomly divided into 3 groups.The isolated rat hearts were continuously microperfused with oxygenated blood at 4℃in experimental group,those in control group microperfused with St.Thomas solution and those in solution group were preserved with St.Thomas solution.After preservation the hemodynamic indexes of rat hearts were measured using Langendorff system,including the left ventricular end-diastolic pressure (LVEDP),the left ventricular systolic pressure (LVSP),the left ventricular developed pressure (LVDP) and the rate of the left ventricular pressure change (?dp/dt),then the contents of adenosine triphosphate (ATP) were determined by high-performance liquid chromatography and myoeardium ul- trastructures were observed under an electric microscope.Results After 30 min perfusion of Langen- dorff system,the LVSP,LVDP and?dp/dt were (38,25?3.84) mm Hg,(32.54?4.01) mm Hg and (1080?123) mm Hg/s respectively in experimental group;(34.48?4.68) mm Hg,(19.27?4.63) mm Hg and (935?196) mm Hg/s respectively in control group;(32.14?4.95) mm Hg, (16.99?4.85) mm Hg and (825?302) mm Hg/s respectively in solution group.The hemodynamic indexes in experimental group were superior to those in control group and solution group (P

OBJECTIVE:To strengthen the inspection for qualification of new drugs when introduced in order to guarantee the quality of new drugs and the safety of drug use.METHODS:The problems existing in the inspection for qualification of new drugs were exemplified and classified.RESULTS&CONCLUSION:There existed the problems in the respect of validity,authenticity,effectiveness,and integrality.The good maintainance of the database of SFDA plays a important role in in-specting the new drugs when introduced,while on the other hand such issues as establishment and use of credibility file in medical agencies are worth discussing.