Role of interleukin-3 in the regulation of intracellular K+ homeostasis in cultured murine haemopoietic cells.

Abstract:

:Comparative fluorimetric, flow cytofluorimetric and fluorescence ratiometric determinations of intracellular K+ concentrations in murine haemopoietic cells (FDCP-Mix clone A4) cultured in the presence and absence of the specific growth factor Interleukin-3 were carried out with the fluorescent potassium-binding benzofuran-isophthalate acetoxymethyl ester probe. Cell suspensions kept in the absence of Interleukin-3 for 5 hours exhibited lower fluorescence intensities and smaller fluorescence ratios than their growth-factor-replete counterparts, an effect found to be reversible by readdition of the growth factor. It is concluded that Interleukin-3 deprivation of these cells leads to loss of intracellular K+. It is tentatively suggested that this deprivation-induced K+ loss might be associated with an early event in apoptotic cell death.

authors

Laskay G,Várhelyi T,Dale RE,Dexter TM

doi

10.1006/bbrc.1995.2294

subject

Has Abstract

pub_date

1995-09-14 00:00:00

pages

348-53

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006291X85722942

journal_volume

214

pub_type

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