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Evidence of Hypoxic Areas Within the Arterial Wall In Vivo

Open access
Björnheden, T., Levin, M., Evaldsson, M., Wiklund, O.·1999·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

Abstract—The anoxemia theory of atherosclerosis states that an imbalance between the demand and supply of oxygen in the arterial wall is a key factor for the development of atherosclerotic lesions. Direct in vitro and in situ measurements have shown that P o2 is decreased in the more deeply situated parts of the media, but the degree of hypoxia in vivo or the distribution of hypoxia along the arterial tree is not known. For this reason, we have developed a method for the detection of hypoxia in the arterial wall in vivo by using a hypoxia marker, 7-(4′-(2-nitroimidazol-1-yl)-butyl)-theophylline, that may be visualized by immunofluorescence. In the present study, we have used this method in rabbits with experimentally induced atherosclerosis. Our results indicate that zones of hypoxia occur at depth in the atherosclerotic plaque. The mechanism was probably an impaired oxygen diffusion capacity due to the thickness of the lesion, together with high oxygen consumption by the foam cells. Thus, we have for the first time demonstrated that hypoxia actually does exist in the arterial wall in vivo, lending support to the anoxemia theory of atherosclerosis.

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Crossref · 10.1161/01.atv.19.4.870

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Metadata

Authors
Björnheden, T., Levin, M., Evaldsson, M., & Wiklund, O.
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
1999-04
Volume
19
Issue
4
Pages
870-876
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W2017574292
Cited by
286
References
0
FWCI
1.92
Type
journal article
Language
en
Open access
bronze

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.