Carine Bossenmeyer-Pourié, A David Smith, Sylvain Lehmann, Vincent Deramecourt, Bernard Sablonnière, Jean-Michel Camadro, Grégory Pourié, Racha Kerek, Deborah Helle, Remy Umoret, Rosa-Maria Guéant-Rodriguez, Valérie Rigau, Audrey Gabelle, Jeffrey M Sequeira, Edward V Quadros, Jean-Luc Daval, Jean-Louis Guéant
The pathomechanisms that associate a deficit in folate and/or vitamin B12 and the subsequent hyperhomocysteinemia with pathological brain ageing are unclear. We investigated the homocysteinylation of microtubule-associated proteins (MAPs) in brains of patients with Alzheimer's disease or vascular dementia, and in rats depleted in folate and vitamin B12, Cd320 KO mice with selective B12 brain deficiency and H19-7 neuroprogenitors lacking folate. Compared with controls, N-homocysteinylated tau and MAP1 were increased and accumulated in protein aggregates and tangles in the cortex, hippocampus and cerebellum of patients and animals...
July 2019: Journal of Pathology