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. 1969 Aug;48(8):1506–1518. doi: 10.1172/JCI106117

Studies on the role of angiotensin in experimental renovascular hypertension: an immunologic approach

A R Christlieb 1, T U L Biber 1, R B Hickler 1
PMCID: PMC322378  PMID: 4307701

Abstract

The role of angiotensin in three forms of experimental hypertension was assessed in rats. First, the acute blood pressure response to injected angiotensin amide and angiotensin acid was determined. Rats made hypertensive with deoxycorticosterone and saline showed exaggerated responses; rats made hypertensive by clipping one renal artery showed depressed responses; and rats made hypertensive by clipping one renal artery and contralateral nephrectomy showed normal responsivity to angiotensin amide but depressed responsivity to angiotensin acid. These findings suggested that different mechanisms may be involved in the three types of hypertension studied.

To assess the role of angiotensin in these hypertensive rats the blood pressure response, the presence of antibodies determined by radioimmune techniques, and the degree of refractoriness to injected angiotensin after immunization with angiotensin were studied. None of six rats made hypertensive by deoxycorticosterone and saline, and none of five mock immunized rats with renal hypertension of both types had a fall in blood pressure. By contrast, of the 20 rats with both types of renal hypertension in which antibody determinations were made, 11 had developed a significant antibody titer, of which seven showed a significant reduction in blood pressure at the time of antibody determination, and three of the remaining four had a significant blood pressure reduction earlier in their course. None of the nine renal hypertensive rats without demonstrable antibodies had a reduced blood pressure at the time of antibody determination, and only one had an earlier reduction in blood pressure. The renal hypertensive rats were all refractory to injected angiotensin after immunization.

These results suggest a primary role for angiotensin in both forms of renal hypertension.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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