Document Detail


Possible involvement of AT(2) receptor dysfunction in age-related gender difference in vascular remodeling.
MedLine Citation:
PMID:  21414562     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
This study explored the possible involvement of AT(2) receptor stimulation in the age-related gender difference in vascular remodeling of mouse femoral artery induced by cuff placement. In the young adult group of wild-type mice (10 weeks of age), the increase in DNA synthesis, neointimal formation, expression of chemokines, and superoxide anion production in the injured femoral artery were smaller in female than in male mice. These gender differences were smaller in the aged group (50-55 weeks of age) of wild-type mice, because vascular responses of female mice in the aged group were stronger than those in the young group. Treatment with 17β-estradiol attenuated vascular remodeling in aged female mice. AT(2) receptor expression in the injured artery was higher in female than in male in the young group. AT(2) receptor expression in the injured artery of female mice was lower in the aged group than in the young group. Lack of AT(2) receptor increased neointimal formation in the aged group and reduced the inhibitory action of 17β-estradiol in aged female mice. Our findings suggest a possibility that the change in AT(2) receptor stimulation by aging might be involved in the response to estrogen and improvement of vascular remodeling in the aged female group.
Authors:
Midori Okumura; Masaru Iwai; Hirotomo Nakaoka; Hisako Sone; Harumi Kanno; Izumi Senba; Masaharu Ito; Masatsugu Horiuchi
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Society of Hypertension : JASH     Volume:  5     ISSN:  1933-1711     ISO Abbreviation:  J Am Soc Hypertens     Publication Date:    2011 Mar-Apr
Date Detail:
Created Date:  2011-03-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101312518     Medline TA:  J Am Soc Hypertens     Country:  United States    
Other Details:
Languages:  eng     Pagination:  76-84     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 American Society of Hypertension. Published by Elsevier Inc. All rights reserved.
Affiliation:
Department of Molecular Cardiovascular Biology and Pharmacology, Ehime University Graduate School of Medicine, Shitsukawa, Tohon, Ehime, Japan; Department of Obstetrics and Gynecology, Ehime University Graduate School of Medicine, Shitsukawa, Tohon, Ehime, Japan.
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