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- W120167294 abstract "Protein kinase C (PKC) system is a family of proteins with several discrete subspecies having distinct roles in processing an ultimate expression of cellular functions, including smooth muscle cell contraction. Previous inhibitor studies from this lab implicated PKC as a potential determinant of cerebral microvascular tone and reactivity. The authors studied the role of three PKC subspecies in cerebral microvascular reactivity to CO{sub 2} challenge using monoclonal antibody (MAb) specific to PKC subspecies {alpha}, {beta}, and g. Pial arterioles in anesthetized, mechanically ventilated newborn piglets were monitored via a cranial window preparation and intravital microscopy. {alpha}PKC-, {beta}PKC-, or gPKC-MAb was applied to the cortical surface for 15 minutes, washed out, and the pial arteriolar response to CO{sub 2} challenge was evaluated (N = 18). In {beta}PKC-MAb and gPKC-MAb pretreated preparations, the subsequent CO{sub 2} challenge increased pial arteriolar diameter by 18 {plus minus} 2% and 26 {plus minus} 7% which correspond to a 50% and 27% attenuation of CO{sub 2} reactivity,k respectively, as opposed to that in MAb-naive preparations. However, {alpha}PKC-MAb pretreatment did not alter CO{sub 2} reactivity. MAbs alone changed minimally pial arteriolar diameter. The authors conclude that {beta}PKC and gPKC are involved in the expression of microvascular reactivitymore » to CO{sub 2}, providing a putative intracellular biochemical basis for CO{sub 2}/H{sup +}-induced regulation of cerebral microvascular tone.« less" @default.
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- W120167294 date "1991-03-11" @default.
- W120167294 modified "2023-09-27" @default.
- W120167294 title "Role of protein kinase C isoforms in cerebral microvascular reactivity to carbon dioxide" @default.
- W120167294 hasPublicationYear "1991" @default.
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