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Abstract Title:

Withaferin A attenuates bleomycin-induced scleroderma by targeting FoxO3a and NF-κβ signaling: Connecting fibrosis and inflammation.

Abstract Source:

Biofactors. 2018 Nov ;44(6):507-517. Epub 2018 Oct 27. PMID: 30367690

Abstract Author(s):

Swarna Bale, Gauthami Pulivendala, Chandraiah Godugu

Article Affiliation:

Swarna Bale

Abstract:

Scleroderma is an inflammatory autoimmune disease which begins with inflammation due to tissue injury and advances to progressive accumulation of extracellular matrix resulting in scarring and hardening of the skin. Inflammation is a salutary response to tissue injury caused by varied factors. While inflammation is required for systematic wound healing, dysregulated chronic inflammation often leads to tissue scarring. Prominent role of inflammation in pathology and physiology makes it a double edge sword. The objective of this study was to investigate the role of Withaferin A (WFA), a steroidal lactone from Withania somnifera in a 28-day murine model of bleomycin-induced experimental scleroderma. Withaferin A was administered at two doses 2 and 4 mg/kg intraperitoneally for 28 days. At the time of study termination, we observed significant reduction in dorsal skin thickness. Our results indicate that WFA was able to sufficiently suppress pro-inflammatory phase of fibrosis, TGF-β/Smad signaling and also significantly repressed fibroblast conversion to myofibroblasts. Additionally, our study also demonstrated that WFA modulates FoxO3a-Akt-dependent NF-κβ/IKK-mediated inflammatory cascade, which is a prime signaling pathway in fibrogenesis. The findings of this study arepersuasive of WFA as an antifibrotic agent with promising therapeutic effects in scleroderma. © 2018 BioFactors, 44(6):507-517, 2018.

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