Research Papers: Gerotarget (Focus on Aging):
Ovariectomy shortens the life span of female mice
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Valeria Benedusi1, Elisa Martini2, Marinos Kallikourdis2,3, Alessandro Villa1, Clara Meda1, Adriana Maggi1
1Center of Excellence on Neurodegenerative Diseases and Department of Pharmacological and Biomolecular Sciences, University of Milan, 20133, Milan, Italy
2Adaptive Immunity Laboratory, Humanitas Clinical and Research Center, 20089 Rozzano, Milan, Italy
3Department of Medical Biotechnologies and Translational Medicine, University of Milan, 20089 Rozzano, Milan, Italy
Adriana Maggi, e-mail: [email protected]
Keywords: female mammals, ovariectomy, life span, inflammation, estrogens
Received: December 19, 2014 Accepted: December 19, 2014 Published: February 12, 2015
This study shows that lack of ovarian activity has a negative impact on the life span of female mice. The extent to which this phenomenon could be associated with the anti-inflammatory effect of estrogens was analyzed in metabolic organs and aorta, by quantitative analysis of mRNAs encoding proteins in the inflammatory cascade. We demonstrate that the TNFα, IL-1β, MCP-1, MIP-2 and IL-6 mRNA contents are increased in the liver, adipose tissue and aorta 7 months after ovariectomy (ovx) and this increased basal inflammation is maintained as the mice aged. In contrast, the extent of inflammatory gene expression is directly proportional to age in sham-operated mice. As a consequence, at 22 months, most of the inflammatory parameters examined were higher in the sham-operated group compared with the ovx group. These observations led us to propose that the decreased longevity of ovx mice may be due to an acceleration of the basal state of inflammation in metabolic organs, which is likely driven by the combination of a lack of estrogen-mediated anti-inflammatory activity and the loss of gonadal control of energy metabolism.
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