ADAM10 mediates macroglial cell fate decisions in the developing brain
Ge, W.-p.; Wang, Y.; Liang, Y.; Ai, D.; Li, J.-L.; Feng, Z.; Guo, Z.; Chen, X.-j.; Zhang, T.; zou, X.; Gao, J.-L.; Gao, X.; Hu, X.-L.; Wu, L.-J.; Sun, W.; Zhu, S.; Duan, S.; Wang, W.
Show abstract
ADAMs (a disintegrin and metalloproteinase) are transmembrane proteins with cell adhesion and protease activities that contain disintegrin and metalloproteinase domains. ADAM10, a member of the ADAM family, is widely expressed in the brain. There are >40 substrates reported for ADAM10, including Notch, Delta-like ligand-1 (Dll1), and N-cadherin. To date, however, its function in the brain has been largely unknown. We used genetic manipulation to delete Adam10 specifically from glial progenitors in developing brains and observed that conditional knockout mice showed locomotor abnormalities. They all died within 4 months with apparent defects in the cerebellum. By comprehensively analyzing data from bulk RNA sequencing, single-cell RNA sequencing, and staining of the cerebellum, we found that ADAM10 promoted astrocyte generation under physiological conditions. Upon the removal of Adam10 in glial progenitors, the production of oligodendrocytes vastly increased, whereas the generation of astrocytes was substantially inhibited. Our results showed that ADAM10 plays a critical role in macroglial cell fate decisions during brain development.
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