Angiogenesis and capillary maturation phenotypes associated with the Edpm3 locus on rat chromosome 3

Angiogenesis and capillary maturation phenotypes associated with the Edpm3 locus on rat chromosome 3 The quantitative trait locus (QTL) Edpm3 is one of a group of additively acting QTL \responsible for the difference in estrogen-induced pituitary tumor growth between the tumor-susceptible F344 and tumor-resistant BN rat strains. The F344.BN-Edpm3 BN rat strain was produced by moving the segment of rat Chr 3 between D3Mgh7 and D3Mgh13, which contains the Edpm3 QTL, from the BN strain into the F344 genetic background. In a previous study, we used this congenic line to find that the BN allele of the Edpm3 QTL reduces tissue mass and S-phase fraction in the estrogen-induced rat pituitary tumor. We now report on the use of this congenic line to investigate the linkage of Edpm3 to tumor angiogenesis. Contrary to expectation, the F344.BN-Edpm3 BN strain has significantly greater angiogenic activity than does F344 in both treated and untreated rats. Microvessel count (MVC), perivascular space, and number of nonattached pericytes/pericapillary fibroblasts are all elevated in the pituitary by chronic estrogen treatment and their values are significantly greater in F344.BN-Edpm3 BN than F344. Thus, although there is greater angiogenic activity in the pituitary of estrogen-treated F344.BN-Edpm3 BN rats, there is a deficiency in capillary maturation compared with F344. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Mammalian Genome Springer Journals

Angiogenesis and capillary maturation phenotypes associated with the Edpm3 locus on rat chromosome 3

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Publisher
Springer-Verlag
Copyright
Copyright © 2006 by Springer Science+Business Media, Inc.
Subject
Life Sciences; Anatomy; Zoology; Cell Biology
ISSN
0938-8990
eISSN
1432-1777
D.O.I.
10.1007/s00335-005-2450-4
Publisher site
See Article on Publisher Site

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