CELL SENESCENCE IS A FEATURE AND MODULATOR OF THE AGED INFLAMMATORY BRAIN CELL LANDSCAPE. (20th December 2022)

• Record Type: Journal Article
• Authors: Schafer, Marissa; Zhang, Xu; Carver, Chase; Pearsall, Vesselina; Atkinson, Elizabeth; Clarkson, Benjamin; Grund, Ethan; LeBrasseur, Nathan
• Is Part Of: Innovation in aging. Volume 6(2022)Supplement 1
• Page Start: 195
• Page End: 196
• Publication Date: 2022-12-20
• Subjects: Aging -- Periodicals; Gerontology -- Periodicals; 612.67
• DOI: 10.1093/geroni/igac059.781
• Languages: English
• ISSNs: 2399-5300

Abstract

Abstract: New strategies to preserve cognitive function could broadly benefit the aging population. Cellular senescence is a hypothesized mediator of inflammation-related tissue dysfunction in aging. Using single-cell RNA-sequencing, we discovered an age-related brain myeloid population exhibiting overlapping senescent and disease-associated activation signatures, including upregulation of chemoattractant factors. We confirmed senescent brain myeloid cells promote peripheral immune cell chemotaxis in vitro. Through mass cytometry, we demonstrate age- and sex-dependent increases in activated resident and infiltrating brain immune cells are reduced through systemic targeting of p16-positive senescent cells, which is associated with improvements in executive function and spatial learning tasks. Our high-dimensional results reveal dynamic remodeling of the age-dependent brain immune cell landscape and implicate senescent cell targeting as a strategy to counter inflammatory changes and cognitive decline.