Role of oligodendroglial ADAM10 in oligodendrocyte maturation, myelination and myelin maintenance
Lavaud, M.; Padilla-Ferrer, A.; Simon, A.; Acebo, P.; Dargenet-Becker, C.; Gorgievski, V.; Tzavara, E.; Massaad, C.; Jafarian-Tehrani, M.; Meffre, D.
Show abstract
In the central nervous system, oligodendrocytes extend their processes to wrap axons to form myelin sheaths, ensuring saltatory conduction of action potentials and providing trophic support for the axon. Our previous work demonstrated that pharmacological activation of -secretase promotes myelin protection and remyelination after both ex vivo and in vivo demyelination. Based on these findings, the present study aims to investigate the role of oligodendroglial ADAM10 (OLA10; a member of the a-secretase family) in myelin development and maintenance. Using an inducible knockout mouse model for OLA10 (KOOL-A10), we demonstrated that OLA10 deficiency results in delayed maturation of OPC in primary culture, and altered myelination in primary neuron/glia co-culture. Furthermore, an induction of OLA10 deficiency in adult mice was associated with an alteration of myelin sheath thickness and long-term motor and cognitive deficit in males but not in females. Overall, our study highlights the subtle but significant role of ADAM10 expressed by oligodendrocytes in the formation and maintenance of the myelin over time, while emphasizing a sexual dimorphism that carries important relevance for current research.
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