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  • Title: Contribution of circulating maternal lipids to fetal tissues in the guinea pig.
    Author: Thomas CR, Lowy C.
    Journal: J Dev Physiol; 1984 Apr; 6(2):143-51. PubMed ID: 6725884.
    Abstract:
    Using a constant infusion of [1-14C] palmitic acid into 7 late pregnant guinea-pigs the contribution of circulating maternal lipid to the fetuses was assessed. Within the mother plasma radioactivity was found mainly in free fatty acid with only a small amount circulating as triacylglycerol. In contrast in the fetal plasma [14C] was distributed as one-quarter free fatty acid and three-quarters triacylglycerol, with total [14C] levels being four-fold higher than in the maternal plasma after 160 min of infusion. [14C] Triacylglycerol was found in the fetal liver within 10 min of commencing infusion and levels rose to 12 times the levels of [14C] triacylglycerol in the fetal plasma (per/g or ml) by 100-160 min. [14C] Distribution into the lipid moieties of fetal tissues was found to change with time. By 100-160 min the distribution was: liver, triacylglycerol 83%, phospholipid 7%, free fatty acid 4%; fat, triacylglycerol 80%; heart, triacylglycerol 38%, phospholipid 33%, free fatty acid 9%; kidney, triacylglycerol 15%, phospholipid 58%, free fatty acid 10%; muscle, triacylglycerol 70%, phospholipid 10%, free fatty acid 10%; lung, phospholipid 75%; brain, phospholipid 80%. It was concluded that free fatty acid transferred from the mother contributes substantially to fetal lipids in late gestation in this species.
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