Morphine antagonist naloxone (3mg/kgiv ) induced a rise in blood pressure,pulse pressure & respiratory rate in the rat under hemorrhagic shock. It also improved the survival rate. ?Receptor antagonist pheno-xybenzamine ( 1 mg/kg iv ) or adrenalectomy abolished the beneficial effects of naloxone. Reserpine ( 1 mg/kg ip for 5 d) which depleted catecholamines of periphal sympathetic nervous system could not abolish naloxone effects. Resrpine plus adrenalectomy abolished naloxone actions again. It is suggested that the effect of naloxone on the blood pressure is mainly due to release of catecholamine from adrenalmedu-llary. The results of isolated adrenal perfusion indicated that naloxone could not induce a rise in catecholamine concentration of perfused liquid. It is suggested that the action of naloxone on catecholamine release may not be a result of direct action upontbe chromaffin cells.

Objective To observe the efficacy of local gene transfection in CD154 extracellular domain on the survival of renal allografts. Methods The kidneys of Brown Norway (BN) rats were transfected with CD154 extracellular domain gene recombined adenovirus. The transfected kidneys were transplanted to Lewis rats (transfection group). BN→Lewis kidney transplantation with non transplanted kidneys served as the controls. The allograft survival time and the allograft function between the two groups were compared. Results The allograft survival time of the transfection group was longer than that of the controls significantly [(28?7.3)d vs (8.6?1.2) d, P

Objective To explore the clinical efficacy of interventional therapy for transplant renal artery stenosis (TRAS) after allograft renal transplantation.Methods Twenty-two patients with TRAS were treated with interventional therapy,including 10 patients (balloon group) underwent percutaneous transluminal angioplasty (PTA) and 12 patients (stent group) underwent stent implantation.The blood pressure,renal function and quality of life were recorded before and after interventional therapy within two years.Besides,two groups were compared with another group of 6 patients (medicine group) receiving medical treatment only.Results The technical success rate was 90.00% for PTA and 100%for stent implantation.The interventional treatment of TRAS with PTA or stent implantation was associated with significant improvement in blood pressure and renal function,while the conservatively medical treatment of TRAS was inefficient.There was no statistical difference in the short-term improvement of blood pressure or renal function between balloon group and stent group.Six to twenty-four-month follow-up indicated that there were 2 patients with restenosis (2/12,1 6.67%) in stent group.The total restenosis rate for PTA was 40.00%.Eleven patients in stent group achieved normal daily activities and works,except one was treated ineffectively with an uncertain cause.Conclusion Stent implantation for TRAS,especially for TRAS of type Ⅰ and Ⅱ,can be used as the primary therapy.