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• W2187645265 endingPage "L288" @default.
• W2187645265 startingPage "L278" @default.
• W2187645265 abstract "Our goals were to identify the isoforms of protein kinase C (PKC) present in primary cultures of canine pulmonary artery smooth muscle cells (PASMCs) and to determine whether angiotensin II (ANG II) triggers translocation of specific PKC isoforms to discreet intracellular locations. Isoform-specific antibodies and Western blot analysis were utilized to identify the isoforms of PKC in PASMCs. Indirect immunofluorescence and confocal microscopy were used to examine the subcellular distribution of PKC isoforms. Inositol phosphate production was used to assess phospholipase C activation, and fura 2 was utilized to monitor intracellular Ca 2+ concentration in response to ANG II. Six isoforms (α, δ, ε, ζ, ι/λ, and μ) of PKC were identified by Western blot analysis. Immunolocalization of 5 isoforms (α, δ, ζ, ι/λ, and μ) revealed a unique pattern of staining for each individual isoform. ANG II caused translocation of PKC-α from the cytosol to the nuclear envelope and of PKC-δ to the myofilaments. In contrast, cytosolic PKC-ζ did not translocate, but nuclear PKC-ζ was upregulated. Translocation of PKC-α and PKC-δ and upregulation of PKC-ζ in response to ANG II were blocked by the ANG II type 1-receptor antagonist losartan. In addition, ANG II stimulated inositol phosphate production and intracellular Ca 2+ concentration oscillations, which were blocked by losartan. Thus activation of ANG II type 1 receptors triggers the phosphoinositide signaling cascade, resulting in translocation or upregulation of specific PKC isoforms at discreet intracellular sites. The α and ζ isoforms may act to regulate nuclear events, whereas PKC-δ may be involved in modulating contraction via actions on the myofilaments." @default.
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• W2187645265 date "1998-02-01" @default.
• W2187645265 modified "2023-10-15" @default.
• W2187645265 title "Intracellular translocation of PKC isoforms in canine pulmonary artery smooth muscle cells by ANG II" @default.
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• W2187645265 doi "https://doi.org/10.1152/ajplung.1998.274.2.l278" @default.
• W2187645265 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9486214" @default.
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