Tissue endostatin correlates inversely with capillary network in rat heart and skeletal muscles.

Tissue endostatin correlates inversely with capillary network in rat heart and skeletal muscles. Research Abstract Details 

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Tissue endostatin correlates inversely with capillary network in rat heart and skeletal muscles. Abstract Text:

Jian-Wei Gu,Megan Shparago,Wei Tan,Amelia Purser Bailey,

The role of angiostatic factors, including endostatin, in regulating physiological angiogenesis is poorly understood. We used normal adult rats under physiological resting conditions to examine the relationship between tissue endostatin, VEGF, and capillary density (CD) in the heart (high metabolic activity) versus the skeletal muscle (relatively low metabolic activity). The heart (left ventricle, LV) and skeletal muscle (anterior tibialis, AT) were dissected from 12-week-old male Sprague-Dawley rats. Transverse cryosections of LV and AT were stained with FITC-conjugated GS-I-lectin. CD was determined by analysis of randomly acquired digital images of the cryosections using Optimas software. Tissue protein levels of endostatin and VEGF were determined by ELISA assays. Tissue endostatin levels were lower in the LV and higher in the AT (135 +/- 39 vs. 663 +/- 114 pg/mg) and VEGF levels were higher in the LV and lower in the AT (41 +/- 3 vs. 27 +/- 4 pg/mg), respectively (n = 7, P < 0.01). CD in LV and AT were 3632 +/- 428 and 437 +/- 44/mm2, respectively (P < 0.01). We demonstrated that an 8.3-fold greater capillary density is related to a 4.9-fold lower level of tissue endostatin and a 1.5-fold higher level of tissue VEGF in the heart (LV) versus the skeletal muscle (AT) of normal rats under physiological resting conditions. Also, exercise training increased capillary density, decreased tissue endostatin and increased tissue VEGF in the skeletal muscle (AT). These findings suggest that tissue endostatin content correlates inversely with capillary network in the muscle tissues with different metabolic activity, and that tissue endostatin may play a very important role in the metabolic control of angiogenesis under physiological conditions.

Tissue endostatin correlates inversely with capillary network in rat heart and skeletal muscles. Publishing Authors By Initials

JW Gu,M Shparago,W Tan,AP Bailey,

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Tissue endostatin correlates inversely with capillary network in rat heart and skeletal muscles. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Angiogenesis

VOLUME: 9

Page Numbers: 93-9

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ISSN: 0969-6970

DAY: 22

MONTH: 06

YEAR: 2006

Tissue endostatin correlates inversely with capillary network in rat heart and skeletal muscles. Information

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LANGUAGE: eng

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AFFILIATION: Department of Physiology & Biophysics, University of Mississippi Medical Center, 2500 North State Street, Jackson, MS 39216-4505, USA. jgu@physiology.umsmed.edu

Country: Netherlands

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MEDLINETA: Angiogenesis

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