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Cell Proliferation logoLink to Cell Proliferation
. 2003 Jan 31;32(2-3):131–140. doi: 10.1046/j.1365-2184.1999.32230131.x

Purine nucleotides modulate proliferation of brown fat preadipocytes

Christopher Potten, Zbigniew Darzynkiewicz, Kohsuke Sasaki, S M Wilson 1, M J Barsoum 1, B W Wilson 2, P A Pappone 1
PMCID: PMC6726323  PMID: 10535359

Abstract

Abstract. The hypothesis that purine nucleotides and nucleosides affect brown fat preadipocyte proliferation was tested using isolated rat interscapular brown fat preadipocytes in culture. Daily addition of 100 μM adenosine triphosphate (ATP) (n= 4) to cultures enhanced the relative DNA content by 1.5‐fold compared to control cultures (P < 0.05) measured using CyQUANT‐GR fluorescence. Higher concentrations of ATP inhibited growth and 500 (n= 2) or 1000 μM ATP (n= 3) almost completely inhibited growth. ATP (100 μM) did not affect while 250–1000 μM ATP decreased protein content relative to control cultures. Adenosine (100 μM; n= 3) did not affect DNA or protein content, but 500 μM and 1000 μM adenosine suppressed brown adipocyte proliferation and inhibited protein synthesis. Cultured brown adipocytes quickly removed or degraded ATP in the culture media as determined by luciferin–luciferase bioluminescence, suggesting that the inhibitory effects of high ATP concentrations may result from its breakdown to adenosine. The results support the conclusion that ATP promotes and adenosine inhibits brown adipocyte proliferation.

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