PMID: 2510066Jan 1, 1989Paper

Myoinositol inhibits proliferation of cultured Schwann cells: evidence for neurotoxicity of myoinositol

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
T NiwaT Mitsuma

Abstract

To determine whether so-called uraemic toxins exhibit direct toxic effects on Schwann cells, the latter were cultured in a monolayer with the addition of uraemic toxins. Proliferation of Schwann cells was estimated with [3H]-thymidine incorporation into DNA synthesis. Myoinositol, methylguanidine, guanidinosuccinic acid, parathyroid hormone, phenol, p-cresol, 4-hydroxyphenylacetic acid, 4-hydroxybenzoic acid, and 3-carboxy-4-methyl-5-propyl-2-furanpropionic acid were added at various concentrations to the culture medium. Addition of myoinositol at concentrations between 50 and 100 micrograms/ml, values analogous to those in in a dose-dependent way. Myoinositol also inhibited axolemma-stimulated proliferation of Schwann cells. The other compounds at concentrations occurring in uraemic serum did not show any toxic effect on Schwann cells. These results suggest that myoinositol has a neurotoxic effect on Schwann cells, and uraemic polyneuropathy seemed to be caused by a defect in maintaining normal myelin due to accumulation of myoinositol.

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