Macrophage inflammatory state influences susceptibility to lysosomal damage

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dc.contributor.authorWong, A.O.
dc.contributor.authorMarthi, M.
dc.contributor.authorHaag, A.
dc.contributor.authorOwusu, I.A.
dc.contributor.authorWobus, C.E.
dc.contributor.authorSwanson, J.A.
dc.date.accessioned2022-04-27T09:51:14Z
dc.date.available2022-04-27T09:51:14Z
dc.date.issued2022
dc.descriptionResearch Articleen_US
dc.description.abstractMacrophages possess mechanisms for reinforcing the integrity of their endolysosomes against damage. This property, termed inducible renitence, was previously observed in murine macrophages stimulated with LPS, peptidoglycan, IFNγ, or TNFα, which suggested roles for renitence in macrophage resistance to infection by membrane-damaging pathogens. This study analyzed additional inducers of macrophage differentiation for their ability to increase resistance to lysosomal damage by membrane-damaging particles. Renitence was evident in macrophages activated with LPS plus IFNγ, PGE2, or adenosine, and in macrophages stimulated with IFN-β, but not in macrophages activated with IL-4 or IL-10. These responses indicated roles for macrophage subtypes specialized in host defense and suppression of immune responses, but not those involved in wound healing. Consistent with this pattern, renitence could be induced by stimulation with agonists for TLR, which required the signaling adaptors MyD88 and/or TRIF, and by infection with murine norovirus-1. Renitence induced by LPS was dependent on cytokine secretion by macrophages. However, no single secreted factor could explain all the induced responses. Renitence induced by the TLR3 agonist Poly(I:C) was mediated in part by the type I IFN response, but renitence induced by Pam3CSK4 (TLR2/1), LPS (TLR4), IFNγ, or TNFα was independent of type 1 IFN signaling. Thus, multiple pathways for inducing macrophage resistance to membrane damage exist and depend on the particular microbial stimulus sensed.en_US
dc.identifier.otherhttps://doi.org/10.1002/JLB.3A0520-325RR
dc.identifier.urihttp://ugspace.ug.edu.gh/handle/123456789/38004
dc.language.isoenen_US
dc.publisherJohn Wiley & Sonsen_US
dc.titleMacrophage inflammatory state influences susceptibility to lysosomal damageen_US
dc.typeArticleen_US

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