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Histamine H1-receptors in HL-60 monocytes are coupled to Gi-proteins and pertussis toxin-insensitive G-proteins and mediate activation of Ca2+ influx without concomitant Ca2+ mobilization from intracellular stores

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Seifert, Roland ; Grünbaum, L. ; Schultz, Günter
Date of publication of this fulltext: 26 Jan 2012 08:18


The results of binding studies suggest the presence of histamine H1-receptors in human monocytes, but it is not known whether these receptors are functionally active. This prompted us to study the effects of histamine (HA) on cytosolic Ca2+ concentration ([Ca2+]i) and superoxide anion (O2-) formation in HL-60 cells differentiated towards monocytes with 1 alpha,25-dihydroxycholecalciferol. In ...


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