Abstract:
:Sarcopenia is a hallmark of aging. Inflammation due to increased generation of cytokines such as TNFα, IL-1β and IL-6 has been implicated in the pathogenesis of sarcopenia. In skeletal muscle of C57BL/6 mice from 12 until 28 months of age, we observed a progressive reduction of myofiber cross sectional area, loss of type II fibers and infiltration by inflammatory cells. Muscle strength decreased in parallel. Pharmacological TNFα blockade by weekly subcutaneous injection of Etanercept from 16 to 28 months of age prevented atrophy and loss of type II fibers, with significant improvements in muscle function and mice lifespan. The effects on leukocyte recruitment were limited. These results provide a proof of principle that endogenous TNFα is sufficient to cause sarcopenia and to reduce animal survival, and open a novel perspective on novel potential pharmacological treatment strategies based on TNFα blockade to prevent the noxious events associated with aging.
journal_name
Aging (Albany NY)journal_title
Agingauthors
Sciorati C,Gamberale R,Monno A,Citterio L,Lanzani C,De Lorenzo R,Ramirez GA,Esposito A,Manunta P,Manfredi AA,Rovere-Querini Pdoi
10.18632/aging.202200subject
Has Abstractpub_date
2020-11-26 00:00:00pages
23497-23508issue
23issn
1945-4589pii
202200journal_volume
12pub_type
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