Reprod. Nutr. Dev. 46 (2006) 1-8
DOI: 10.1051/rnd:2005057

Glucose metabolism in isolated uteri of immature rats. Influence of prostaglandins and nitric oxide

Ana Beatriz Finkelberg, Jorge Linares and Adolfo Goldraij

Cátedra de Fisiología, Facultad de Odontología, Universidad Nacional de Córdoba, Córdoba, Argentina

(Received 2 February 2005; accepted 24 May 2005; published online 27 January 2006)

Abstract - We studied the contractile activity and glucose metabolism, in terms of production of ¹⁴CO₂ from [¹⁴C] glucose, in isolated uteri of immature rats. Immaturity was due to age or exposure to a restricted diet. The contractile activity in both prepubertal groups persisted for a period of 60 minutes and fell when indomethacin was added to the KRB medium. The production of ¹⁴CO₂ was greater than for adult rats and fell as a result of the addition of indomethacin. The metabolism of [¹⁴C] arachidonic acid showed that the percentage of eicosanoids released in age related immature uteri was greater than that in restricted diet related immature uteri. In animals that are immature as a result of exposure to a restricted diet, ¹⁴CO₂ fell due to the effect of NAME. Sodium nitroprusside and L-arginine increased the production of ¹⁴CO₂. This effect was reverted by NAME and indomethacin. Conversely, the uteri of age related prepubertal rats were not affected. The level of activity of nitric oxide synthase was higher in restricted diet related immature animals and fell following the addition of NS-398. We may conclude that in rats exposed to a restricted diet, NO and COX-2 participate in glucose metabolism whereas they would not be involved in age related prepubertal animals.

Key words: immature rats / glucose metabolism / nitric oxide / arachidonic acid

Corresponding author: Ana Beatriz Finkelberg fink@odo.unc.edu.ar

© INRA, EDP Sciences 2006