Add time:08/27/2019         Source:sciencedirect.com

Aminoalcohols differ in mammalian toxicity at least in part based upon their ability to alter the metabolism of phospholipids and to cause depletion of the essential nutrient choline in animals. This study examined the incorporation of Diisopropanolamine (cas 110-97-4) (DIPA) into phospholipids (PLs) and effects of DIPA upon choline uptake and phospholipid synthesis in Chinese hamster ovary (CHO) cells. Results were compared to those of a related secondary alcohol amine, diethanolamine (DEA), whose systemic toxicity is closely associated with its metabolic incorporation into PLs and depletion of choline pools. DIPA caused a dose-related inhibition of 3H-choline uptake by CHO cells that was approximately 3–4 fold less potent, based upon an IC50, than that reported for DEA. DIPA, in contrast to DEA, did not cause changes in the synthesis rates of 33P-phosphatidylethanolamine, 33P-phosphatidylcholine or 33P-sphingomyelin at either non-toxic or moderately toxic concentrations. Only approximately 0.004%, of administered 14C-DIPA was metabolically incorporated into PLs, over 30-fold less than the incorporation of 14C-DEA under similar conditions. Overall, these data and previous pharmacokinetic and toxicity data obtained in vivo suggests that DIPA is distinct from DEA and lacks significant choline and PL metabolism related toxicity in animals.

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