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. 1995 Dec 15;489(Pt 3):841–848. doi: 10.1113/jphysiol.1995.sp021096

The effects of age on the release of adenine nucleosides and nucleotides from rat caudal artery.

M Hashimoto 1, K Shinozuka 1, R A Bjur 1, D P Westfall 1, K Hattori 1, S Masumura 1
PMCID: PMC1156852  PMID: 8788947

Abstract

1. The spontaneous and alpha-adrenoceptor-induced release of ATP, ADP, AMP and adenosine were determined from arterial segments and from isolated endothelial cells from caudal arteries of young (5-week-old), adult (30-week-old) and old (100- to 110-week-old) Wistar rats. 2. The spontaneous (non-evoked) release of the sum total of the four purines was significantly greater from artery segments of young rats than from adult and old rats. 3. The release of the adenine nucleotides and adenosine induced by methoxamine (10 microM), an alpha 1-adrenoceptor agonist, was greater from artery segments from young rats than from old rats. 4. The spontaneous release of the sum total of the four purines was significantly greater from endothelial cells prepared from caudal arteries of young rats than of old rats. 5. The noradrenaline (10 microM)-induced release of the sum total of the four purines was significantly greater from endothelial cells prepared from caudal arteries of young rats than of old rats. 6. The levels of adenine nucleotides and adenosine, determined in plasma from anaesthetized rats, were significantly higher in young rats compared with adult and old rats. 7. These findings suggest that the release of ATP from the vascular endothelial cells is reduced with advancing age.

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Selected References

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