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Inhibition of microtubule formation by uremic toxins: action mechanism and hypothesis about the active component.

We show in vitro inhibitory effect of a mixture of uremic toxins on tubulin 6S polymerization. It proves the existence of a direct interaction protein-toxin where micro-tubule associated proteins are not involved. A similar phenomenom could occur in uremic neuropathy. The action mechanism of this interaction is quite different from that of classical tubulin inhibitors: Vinca alcaloïdes and colchicine. Finally we hypothesize about the active molecule.