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Abstract:
:Aging, like obesity, is associated with metabolic and inflammatory alterations within adipose tissue in older individuals. Younger females are protected from adipose inflammation, but older post-menopausal females exhibit exaggerated visceral adiposity correlated with increased disease risk. Obesity accelerates the onset and progression of age-associated diseases, but it is unclear if aging and obesity drive adipose tissue dysfunction in a sexually dimorphic fashion. We investigated adipose tissue metabolism and inflammation in a diet-induced obesity model in young and old mice. We identified age related sex differences in adipose tissue macrophages (ATMs), fibrosis and lipid metabolism in male and female visceral fat depot (GWAT). Although aging normalized body weights between the sexes, females remained protected from proinflammatory ATMs and stimulated lipolysis failed to adversely affect the inflammatory state even with obesity. Older obese males had augmented CD11c+ ATMs and higher insulin levels, while females showed increased visceral adiposity and exaggerated Pparγ, and Pgc1α expression. Obesity in aging demonstrated similar expression of GWAT p53, p16, p21, Timp1 and Tgfβ1 in both sexes. Our studies suggest that even with aging, female GWAT shows an attenuated inflammatory response compared to males due to an efficient oxidative metabolism combined with an active tissue remodeling state.
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最新影响因子:5.955 | 期刊ISSN:1945-4589 | CiteScore: |
出版周期:Monthly | 是否OA:YES | 出版年份:2008 |
期刊官方网址:http://www.aging-us.com/
期刊投稿地址:http://aging.msubmit.net/
自引率:7.40% | 研究方向:CELL BIOLOGY- |
出版地区:UNITED STATES |
SCI期刊coverage:Science Citation Index Expanded(科学引文索引扩展)
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Aging-US
老龄化
大类(学科) | 小类(学科) | 学科排名 |
医学 |
CELL BIOLOGY (细胞生物学) 2区 GERIATRICS & GERONTOLOGY (老年医学) 2区 |
48/190 5/53 |
年度总发文量 | 年度论文发表量 | 年度综述发表量 |
149 | 146 | 3 |
引文计数(2018)
文献(2015-2017)
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