An ocular renin-angiotensin system. Immunohistochemistry of angiotensinogen.

Abstract:

:The circulating renin-angiotensin system (RAS) is an important determinant in maintaining adequate systemic blood pressure, and it also may modify organ-specific blood flow. All recognized RAS components have been identified in the eye. In this study, angiotensinogen (ANG) was localized using an affinity-purified antibody and paraffin sections of seven human eyes. An antibody for human serum albumin was used for comparison. The ANG was present selectively in the cytoplasm of the nonpigmented ciliary epithelium (NPCE), more prominently in the pars plana than in the pars plicata. Both ANG and albumin were present in the blood vessel lumina of the uvea and retina. Both antibodies also stained perivascular tissue in the uvea, but not in the retina, reflecting the relative tightness of blood-tissue barriers. The detection of ANG in the NPCE may be significant in view of previous descriptions localizing prorenin and angiotensin-converting enzyme in the same cell layer.

authors

Sramek SJ,Wallow IH,Tewksbury DA,Brandt CR,Poulsen GL

keywords:

subject

Has Abstract

pub_date

1992-04-01 00:00:00

pages

1627-32

issue

5

eissn

0146-0404

issn

1552-5783

journal_volume

33

pub_type

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