The dose-response reaction of NE, ACh, CaCl2 & KC1 was observed in isolated toad hearts. When the above substances in different concentrations were employed, or the hearts were affected by difference blockers, a biphasic action could be observed. The positive inotropic effect of the substance was inhibited with the presentation of negative inotropic eff ect ,if ? &(or) ? receptor were blocked. The negative inotropic effect of the substance changed into positive, when M1, M2 receptor &(or) Cl- channel were blocked.

Objective To study the mechanism of paraquart-induced renal injury in rats,the expression of heine oxygenase-2(HO-1) and inducible nitric oxide synthase (iNOS).Methods 84 adult healthy Spragne-Dawley (SD) rats (female and male in half) were randomly divided into two groups,the control group (group A,n=42) and the paraquart group (group B,n=42).The rats in group B were treated with paraquart (25 mg/kg) intraperitoneally,the rats in group A were treated with the same dose of normal saline.Its histopathological change,the expression of HO-1,iNOS and evaluate the mRNA expression of HO-1 were observed.Results ①In group A,the tissue structure was clear without abnormal.In group B,there were obvious lesions in the renal tubule of cortical part,including cellular swelling,the canula narrow,the mesenchymal congestion and edema.These pathologic changes gradually reached the peak on the 1st day,and did not relieved till the end ofthis study.②In group A,there was no or weak expression of iNOS.At the 3rd hour,the expressions of iNOS in group B were observed in the kytoplasm of renal tubular epithelial cell and glomemlar endothelial cell of cortical part.It reached the peak on the 1st day and continued at a high level after that.③ In group A,there was no or weak expression of HO-1 and HO-1 mRNA.At the 3rd hour,the expressions of HO-1 in group B were observed in the membrane and kytoplasm of renal tubular epithehal cell of cortical part,immunohistochemistry score(IHS) was higher,the expression of HO-1 mRNA increased,there was a statistical significance between group B and group A(P<0.05).It reached the peak on the 1st day,and then decreased,there were 110 statistical difference between group B and group A on the 5th day(P>0.05).Conclusions HO-1 and iNOS ale involved in the procedures of renal injury,but its mode of action and regulating path still need further study.

Objective To explore the re-treatment approach for nonsmall-cell lung cancer(NSCLC)in clinic with therapeutic alliance of cryotherapy and interventional chemotherapy. Methods Sixty two patients with uncontrolled NSCLC after common radiotherapy and(or)chemotherapy were re-treated with therapeutic alliance of cryotherapy and interventional chemotherapy, and their serum tumor markers of NSE, CEA, CY21-1 and the value(I.S%,I.O.D%)of correlative protein in nucleolus region-Ag-NORs were tested before and after the re-treatment. Meanwhile, patients' one year survival and therapeutic effect to NSCLC were recorded during the follow up. Results After the re-treatment, distinguished decline of the serum tumor markers was observed(P