The effect of regression of left ventricular hypertrophy (LVH) on ventricular performance was studied in two-kidney, one clip Goldblatt hypertensive rats (2K1C) treated with methyldopa or by unclipping. Sham operations were performed in a total of 21 rats; 12 and nine were studied after 4 and 6 weeks, respectively. Hypertension was induced in 38 additional rats. Of these, 11 were studied at 4 w...

We studied the effects of anteroventral third ventricle (AV3V) lesions on the vascular Na+-pump activity and blood pressure of rats prepared by the two-kidney Goldblatt procedure. Blood pressures and Na+-pump activity of the isolated tail arteries, measured as ouabain-sensitive 86Rb+-uptake were determined in rats with renal artery clips, rats with AV3V lesions, and rats with AV3V lesions. Rats...

In order to improve on the technique of noninvasive detection of renal artery stenosis, we studied the effects of angiotensin converting enzyme inhibition with captopril on individual kidney hemodynamics and function as assessed by technetium-99m diethylenetriaminepentaacetic acid [( 99mTc]DTPA) renal flow studies and iodine-131 orthoiodohippurate [( 131I]hippuran) renography in experimental Go...

To demonstrate potential therapeutic effects of kallikrein gene delivery, we delivered adenovirus (Ad.CMV-cHK) carrying the human tissue kallikrein gene into two-kidney, one-clip Goldblatt hypertensive rats. A single intravenous injection of the recombinant adenovirus caused a delay of blood pressure increase that began 1 day after injection and continued for 24 days. A maximal blood pressure r...

The aims of this study were to delineate the relative contribution of angiotensin II (ANG II) subtype 1A (AT1A) and 1B (AT1B) receptors to the development of two-kidney, one-clip (2K1C) Goldblatt hypertension in mice, to examine if increased nitric oxide synthase (NOS) activity counteracts the vasoconstrictor influences of ANG II in 2K1C hypertensive mice, and to determine the role of ANG II ty...

Increasing interest has been directed toward the possible role of trophically acting molecules as modulators or initiators, or both, of myocardial hypertrophy. The aim of the present study was to investigate the possible role of one such molecule, namely, insulin-like growth factor I, in myocardial hypertrophy developed in response to renal artery stenosis. Two-kidney, one clip Goldblatt hypert...

Attempted correction of two-kidney, one clip Goldblatt hypertension in the rat was carried out by three techniques; removal of the constricting clip, removal of the ischemic kidney, and converting enzyme blockade by oral captopril. Since duration of hypertension is said to be a critical factor, groups of rats were studied after short term (less than 6 weeks from clipping) and chronic (greater t...

This article is a short story of the work done by our group in Dr. Bernardo Houssay's larx> ratories in Buenos Aires 50 years ago that led to the discovery of angiotensin. In 1934 I was 23 years old and a student at the Faculty of Medicine of Buenos Aires University. I was paying for my studies by working as an undergraduate assistant teaching physiology to medical students at the "Instituto de...