Objective The study will explore effects of the autoantibodies against AT1 receptor and angiotensin Ⅱ on the refractory hypertension. Methods Seventy-seven patients (46 men and 31 women) with essential hypertension w...Objective The study will explore effects of the autoantibodies against AT1 receptor and angiotensin Ⅱ on the refractory hypertension. Methods Seventy-seven patients (46 men and 31 women) with essential hypertension were divided into groups of refractory hypertension (RH) and hypertension (HT) according to the 1999 WHO-ISH Guidelines for the Management of Hypertension. Forty normotensives (22 men) were recruited as controls. The mean age was 54. 3±13 years old in RH group, 53. 5±9 years old in HT group and 51. 2±11. 9 years old in normotensives (NT) group. The mean blood pressure was 154. 2±9. 4/98. 4± 8. 2 mmHg in RH group and 130. 1±7. 6/80. 5±6. 7 mmHg in HT group after combination drug therapy of hypertension for 4 weeks. Blood pressure in NT group was 120. 8±11. 7/76. 4 ± 7. 2 mmHg. The epitope of the 2nd extracellular loops of AT1 receptor was synthesized and used as antigens to screen the autoantibodies by ELISA. Plasma angiotensin (Ang) II were examined by a radioimmunoassay. Results The autoantibodies against AT1 receptor were positive in 18 (46. 15 %) patients with RH, in 4 (10. 5 % ) hypertension and in 3 (7. 5 % ) normotensives, P < 0. 01. Ang Ⅱwas 57. 01±52. 63 pmol/L in patients with RH. Both the autoantibodies positive and the Ang Ⅱ increasing were 4 (10. 3 % ) cases, both normal were 7 (17. 9 % ) cases, the autoantibodies positive or Ang II increasing was all of 14 (35. 9 % ) cases (x2 = 0. 09, P>0. 05) . There was no relationship between the autoantibodies against AT1 receptor and the angiotensin Ⅱ in refractory hypertension. Conclusion The autoantibodies against AT1 receptor and Ang Ⅱ might be two independent factors in developing of refractory hypertension. The findings suggest that AT1 receptor an-tagnist used in the treatment of refractory hypertension might have an important value.展开更多
Objective Vascular endothelial cells senescence is one of major risk factors for atherosclerotic diseases,which can be induced by endogenous peptides,such as angiotensin Ⅱ(Ang Ⅱ).However,the effect of chronic Ang Ⅱ...Objective Vascular endothelial cells senescence is one of major risk factors for atherosclerotic diseases,which can be induced by endogenous peptides,such as angiotensin Ⅱ(Ang Ⅱ).However,the effect of chronic Ang Ⅱ stimulation on endothelial senescence remains unknown.Therefore,this study aims to investigate the changes in morphology and function of human umbilical vein endothelial cells(HUVECs)in response to the chronic stimulation of Ang Ⅱ.展开更多
Purpose: To investigate the levels of renin-angiotension system (RAS) components in normal tension glaucoma patients and normal controls. Methods: Blood samples were obtained from 11 normal tension glaucoma(NTG)patien...Purpose: To investigate the levels of renin-angiotension system (RAS) components in normal tension glaucoma patients and normal controls. Methods: Blood samples were obtained from 11 normal tension glaucoma(NTG)patients and 11 age and sex matched controls. The levels of renin and angiotensin AⅡof 11 NTG patients and normal controls were examined by radio-immunity test. Statistical analyses were performed by paired t test. Results:The levels of renin of NTG patients and normal controls are (769.085±183.217) pg/ml/n and (822.035 ±124.140) pg/ml/n, while the levels of angiotensin A Ⅱof NTG patients and normal controls are (37.347±10.669)pg/ml and (24.836±10.665)pg/ml respectively. No statistically significant differences were observed between the levels of renin and angiotensin among NTG patients and normal controls. Conclusion: There were not many abnormalities of the levels of circulating rennin and angiotensin AⅡof NTG patients in our study. Eye Science 2005 ;21 :192-195.展开更多
文摘Objective The study will explore effects of the autoantibodies against AT1 receptor and angiotensin Ⅱ on the refractory hypertension. Methods Seventy-seven patients (46 men and 31 women) with essential hypertension were divided into groups of refractory hypertension (RH) and hypertension (HT) according to the 1999 WHO-ISH Guidelines for the Management of Hypertension. Forty normotensives (22 men) were recruited as controls. The mean age was 54. 3±13 years old in RH group, 53. 5±9 years old in HT group and 51. 2±11. 9 years old in normotensives (NT) group. The mean blood pressure was 154. 2±9. 4/98. 4± 8. 2 mmHg in RH group and 130. 1±7. 6/80. 5±6. 7 mmHg in HT group after combination drug therapy of hypertension for 4 weeks. Blood pressure in NT group was 120. 8±11. 7/76. 4 ± 7. 2 mmHg. The epitope of the 2nd extracellular loops of AT1 receptor was synthesized and used as antigens to screen the autoantibodies by ELISA. Plasma angiotensin (Ang) II were examined by a radioimmunoassay. Results The autoantibodies against AT1 receptor were positive in 18 (46. 15 %) patients with RH, in 4 (10. 5 % ) hypertension and in 3 (7. 5 % ) normotensives, P < 0. 01. Ang Ⅱwas 57. 01±52. 63 pmol/L in patients with RH. Both the autoantibodies positive and the Ang Ⅱ increasing were 4 (10. 3 % ) cases, both normal were 7 (17. 9 % ) cases, the autoantibodies positive or Ang II increasing was all of 14 (35. 9 % ) cases (x2 = 0. 09, P>0. 05) . There was no relationship between the autoantibodies against AT1 receptor and the angiotensin Ⅱ in refractory hypertension. Conclusion The autoantibodies against AT1 receptor and Ang Ⅱ might be two independent factors in developing of refractory hypertension. The findings suggest that AT1 receptor an-tagnist used in the treatment of refractory hypertension might have an important value.
文摘Objective Vascular endothelial cells senescence is one of major risk factors for atherosclerotic diseases,which can be induced by endogenous peptides,such as angiotensin Ⅱ(Ang Ⅱ).However,the effect of chronic Ang Ⅱ stimulation on endothelial senescence remains unknown.Therefore,this study aims to investigate the changes in morphology and function of human umbilical vein endothelial cells(HUVECs)in response to the chronic stimulation of Ang Ⅱ.
文摘Purpose: To investigate the levels of renin-angiotension system (RAS) components in normal tension glaucoma patients and normal controls. Methods: Blood samples were obtained from 11 normal tension glaucoma(NTG)patients and 11 age and sex matched controls. The levels of renin and angiotensin AⅡof 11 NTG patients and normal controls were examined by radio-immunity test. Statistical analyses were performed by paired t test. Results:The levels of renin of NTG patients and normal controls are (769.085±183.217) pg/ml/n and (822.035 ±124.140) pg/ml/n, while the levels of angiotensin A Ⅱof NTG patients and normal controls are (37.347±10.669)pg/ml and (24.836±10.665)pg/ml respectively. No statistically significant differences were observed between the levels of renin and angiotensin among NTG patients and normal controls. Conclusion: There were not many abnormalities of the levels of circulating rennin and angiotensin AⅡof NTG patients in our study. Eye Science 2005 ;21 :192-195.
