Macromolecular transport across arterial and venous endothelium in rats. Studies with Evans blue-albumin and horseradish peroxidase.

Author:

Chuang P T1,Cheng H J1,Lin S J1,Jan K M1,Lee M M1,Chien S1

Affiliation:

1. Institute of Biomedical Sciences, Academia Sinica, National Taiwan University College of Medicine, Taipei, R.O.C.

Abstract

Atherosclerotic lesions are characterized by lipid infiltration in regions with high rates of endothelial cell turnover. The present investigation was designed to elucidate the route of macromolecular transport across vascular endothelium. The aorta and vena cava of male Sprague-Dawley rats were perfusion-fixed after the intravenous injection of Evans-blue albumin (EBA) or horseradish peroxidase (HRP). Fluorescence microscopic examination of en face preparation of the aorta stained with hematoxylin allowed the identification of endothelial cells that underwent mitosis, together with the localization and quantification of fluorescent spots for EBA leakage. The HRP specimens were subjected to histochemical treatment, and HRP leakage was seen as brown spots under the light microscope. Silver nitrate stain was added in both EBA and HRP studies to outline cell boundaries and to visualize stigmata, stomata, and dead cells. In the aorta, almost every dividing cell showed junctional leakage to albumin and HRP, with clustering of leaky spots around the branch orifices. Time-dependent studies showed gradual increases in the diameter and number of these heterogeneously sized leaky spots, which finally fused to sizes corresponding to the "blue areas" for EBA or "brown areas" for HRP. Compared with arteries, veins had fewer mitotic cells, but more dead cells and diffuse dye-staining areas, indicating a more rapid transport of macromolecules. The leaky spots in the artery were associated mainly with mitotic cells, dead cells, and stigmata, whereas those in the vein occurred primarily at regions with dead cells. These results suggest that the preferential association of the enhanced transport of macromolecules with mitosis in the arterial as compared to venous endothelium and the differential behavior in transmural transport between arteries and veins may form the basis for the predilection of atherosclerosis in arteries.

Publisher

Ovid Technologies (Wolters Kluwer Health)

Subject

Cardiology and Cardiovascular Medicine

Reference25 articles.

1. Microscopic structure of disturbed flows in the arterial and venous systems and Its Implication In the localization of vascular diseases;Karino T;Int Anglo,1986

2. Caplan BA Schwartz CT. Increased endottiellal cell turnover in areas of In vivo Evans blue uptake In the pig aorta Atherosclerosis 1973; 17:401-417

3. Endothellal cell morphology In areas of In vivo Evans blue uptake in the aorta of young pigs;Qerrtty RG;Am J Pathol,1977

4. Quantitatton of apo B in aortas of hyperchotesterolemlc swine;Hoft HF;Lab Invest,1983

5. Local variation in arterial wall permeability to low density lipoprotein in normal rabbit aorta.

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