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Published on: February 27, 2016
Sirtuins and Accelerated Aging in Scleroderma
Anne E Wyman1,2,3, Sergei P Atamas4,5
1Geriatric Research Education and Clinical Center (GRECC), VA Maryland Health Care Center, Baltimore VA Medical Center, Baltimore, MD, USA.
Purpose Of Review:
Premature activation of aging-associated molecular mechanisms is emerging as an important contributor to many diseases, including scleroderma. Among central regulators of the aging process are a group of histone deacetylases called sirtuins (SIRTs). Recent findings implicate these molecules as pathophysiological players in scleroderma skin and lung fibrosis. The goal of this article is to review recent studies on the involvement of SIRTs in scleroderma from the perspective of aging-related molecular mechanisms.
Recent Findings:
Despite a degree of controversy in this rapidly developing field, the majority of data suggest that SIRT levels are decreased in tissues from patients with scleroderma compared to healthy controls as well as in animal models of scleroderma. Molecular studies reveal several mechanisms through which declining SIRT levels contribute to fibrosis, with the most attention given to modulation of the TGF-β signaling pathway. Activation of SIRTs in cell culture and in animal models elicits antifibrotic effects. Declining SIRT levels and activity are emerging as pathophysiological contributors to scleroderma. Restoration of SIRTs may be therapeutic in patients with scleroderma.
Insights
Scleroderma is linked to aging mechanisms and reduced sirtuin (SIRT) levels. Restoring SIRT activity shows promise for treating fibrosis in scleroderma patients.
Area of Science:
- Molecular Biology
- Aging Research
- Rheumatology
Background:
- Aging processes contribute to diseases like scleroderma.
- Sirtuins (SIRTs) are key regulators of aging.
- SIRTs are implicated in scleroderma pathogenesis, particularly fibrosis.
Purpose of the Study:
- To review the role of SIRTs in scleroderma.
- To examine SIRT involvement through the lens of aging-related mechanisms.
Main Methods:
- Literature review of recent studies on SIRTs and scleroderma.
- Analysis of molecular mechanisms linking SIRTs to fibrosis.
- Examination of SIRT modulation in cellular and animal models.
Main Results:
- SIRT levels are generally decreased in scleroderma patients and models.
- Reduced SIRTs contribute to fibrosis, notably via TGF-β signaling.
- Activating SIRTs demonstrates antifibrotic effects in experimental settings.
Conclusions:
- Declining SIRT levels and activity are pathophysiological factors in scleroderma.
- Restoration of SIRT function may offer a therapeutic strategy for scleroderma.
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