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- W3114010601 abstract "Pressure ulcers (PUs) have no cure and are of significant health and economic concern worldwide, owing to the increasing population of elderly individuals at high risk for PU and who have impaired tissue repair. Macrophages play a pivotal role in PU development and healing. Imbalances between M1 (inflammatory) and M2 (anti-inflammatory/reparative) macrophages result in delayed resolution of inflammation and wound healing. We hypothesized that M1-to-M2 macrophage polarization mediated by artificial apoptotic cell mimics, phosphatidylserine-containing liposomes (PSLs), would protect against PU formation and accelerate PU healing in young (2-month-old) and middle-aged (12-month-old) mice. We used a clinically relevant murine model of ischemia-reperfusion-induced PU. Middle-aged mice displayed the delayed wound healing associated with increased inflammation, decreased collagen deposition, reduced angiogenesis, and delayed wound closure relative to their younger counterparts. PSL treatment significantly inhibited PU formation and promoted tissue remodeling in both age groups. These effects were mediated by increased M1-to-M2 macrophage polarization, induced by the PSLs. Thus, this study suggests, for the first time, that PSL-induced M2-like macrophage polarization is a promising strategy to protect against PU formation and promote PU repair in human patients of all ages." @default.
- W3114010601 created "2021-01-05" @default.
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- W3114010601 date "2021-02-01" @default.
- W3114010601 modified "2023-10-06" @default.
- W3114010601 title "Protective and healing effects of apoptotic mimic-induced M2-like macrophage polarization on pressure ulcers in young and middle-aged mice" @default.
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- W3114010601 doi "https://doi.org/10.1016/j.jconrel.2020.12.052" @default.
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