In order to investigate the immunological damage in rat immunized with AT1-receptor peptide, 18 male Wistar rats were divided into two groups: immunized-group (n=12), each rat was immunized with 150 μg AT 1-receptor...In order to investigate the immunological damage in rat immunized with AT1-receptor peptide, 18 male Wistar rats were divided into two groups: immunized-group (n=12), each rat was immunized with 150 μg AT 1-receptor petide coupled to bovine serum albumin, together with Freund's adjuvant. Control group (n=6), sham-immunized, 'immunized liquid' was same as immunized-group except AT1-receptor peptide. Systolic blood pressure (SBP) was measured by using the tail-cuff technique, antibody against AT1-receptor peptide detected by using ELISA method, and left ventricular myocardium and renal cortex sections were observed under light and electron microscopy. There was no significant difference in SBP and light microscopic observation of the tissue sections between the immunized-group and control group. The O.D. value of anti-AT1-receptor peptide antiserum was significantly higher in the immunized-group than in the rats before immunization and control group (P<0.01). Positive rate in the immunized-group was 100 %, while 0 % in the control group. Ultramicroscopic morphology showed potential myocardial injury, including: increase in number of mitochondria, swelling of many mitochondria with reduction in number or absence of their cristae and cristolysis, disorder of the cardiac myofibrils, and myofibrillar disruption and myocytolysis. And lysosomes were increased in renal tubular epithelia. The AT1-receptor peptide could induce to generate the antibody against AT1-receptor peptide and lead to myocardial and renal damage in rats.展开更多
In the present paper, the effect of α1 and α2 subtypes of the thoracic spinal cord on electroacupuncture (EA)-induced improvement of ischemic cardiac electrical and mechanical activities was observed in 80 anestheti...In the present paper, the effect of α1 and α2 subtypes of the thoracic spinal cord on electroacupuncture (EA)-induced improvement of ischemic cardiac electrical and mechanical activities was observed in 80 anesthetized rabbits by using ECG-ST, MBP, LVP and dp/dt max as indexes. Results showed that:1) EA at "Neiguan" could significantly improve the electrical and mechanical activities of the ischemic heart; 2) the effect of EA could be enhanced to a certain degree when α1 receptors of the thoracic spinal cord were activated by subarachnoid microinjection of phenylephrine, while it was weakened when α1 receptors were inhibited by microinjection of parison; and 3) activation or inhibition of α2 receptors of the thoracic spinal cord by microinjection of clonidine and yohimbine had no marked influence on the effect of EA in improving electrical activity of the ischemic heart, but when activated,they could weaken the effect of EA in raising MBP; while suppressed, they had no any striking influence on the effect of EA in raising MBP. It suggests that among α-receptors, predominantly α1-receptors participate in the process of EA-induced improvement of performance of ischemic heart.展开更多
文摘In order to investigate the immunological damage in rat immunized with AT1-receptor peptide, 18 male Wistar rats were divided into two groups: immunized-group (n=12), each rat was immunized with 150 μg AT 1-receptor petide coupled to bovine serum albumin, together with Freund's adjuvant. Control group (n=6), sham-immunized, 'immunized liquid' was same as immunized-group except AT1-receptor peptide. Systolic blood pressure (SBP) was measured by using the tail-cuff technique, antibody against AT1-receptor peptide detected by using ELISA method, and left ventricular myocardium and renal cortex sections were observed under light and electron microscopy. There was no significant difference in SBP and light microscopic observation of the tissue sections between the immunized-group and control group. The O.D. value of anti-AT1-receptor peptide antiserum was significantly higher in the immunized-group than in the rats before immunization and control group (P<0.01). Positive rate in the immunized-group was 100 %, while 0 % in the control group. Ultramicroscopic morphology showed potential myocardial injury, including: increase in number of mitochondria, swelling of many mitochondria with reduction in number or absence of their cristae and cristolysis, disorder of the cardiac myofibrils, and myofibrillar disruption and myocytolysis. And lysosomes were increased in renal tubular epithelia. The AT1-receptor peptide could induce to generate the antibody against AT1-receptor peptide and lead to myocardial and renal damage in rats.
文摘In the present paper, the effect of α1 and α2 subtypes of the thoracic spinal cord on electroacupuncture (EA)-induced improvement of ischemic cardiac electrical and mechanical activities was observed in 80 anesthetized rabbits by using ECG-ST, MBP, LVP and dp/dt max as indexes. Results showed that:1) EA at "Neiguan" could significantly improve the electrical and mechanical activities of the ischemic heart; 2) the effect of EA could be enhanced to a certain degree when α1 receptors of the thoracic spinal cord were activated by subarachnoid microinjection of phenylephrine, while it was weakened when α1 receptors were inhibited by microinjection of parison; and 3) activation or inhibition of α2 receptors of the thoracic spinal cord by microinjection of clonidine and yohimbine had no marked influence on the effect of EA in improving electrical activity of the ischemic heart, but when activated,they could weaken the effect of EA in raising MBP; while suppressed, they had no any striking influence on the effect of EA in raising MBP. It suggests that among α-receptors, predominantly α1-receptors participate in the process of EA-induced improvement of performance of ischemic heart.
