Engulfing Cells Promote Neuronal Regeneration and Remove Neuronal Debris Through Distinct Biochemical Functions of CED-1

Overview

Journal Nat Commun

Specialty Biology

Date 2018 Nov 20

PMID 30451835

Citations 14

Authors

Hui Chiu

Yan Zou

Nobuko Suzuki

Yi-Wen Hsieh

Chiou-Fen Chuang

Yi-Chun Wu

Chieh Chang

Affiliations

Soon will be listed here.

Abstract

Two important biological events happen coincidently soon after nerve injury in the peripheral nervous system in C. elegans: removal of axon debris and initiation of axon regeneration. But, it is not known how these two events are co-regulated. Mutants of ced-1, a homolog of Draper and MEGF10, display defects in both events. One model is that those events could be related. But our data suggest that they are actually separable. CED-1 functions in the muscle-type engulfing cells in both events and is enriched in muscle protrusions in close contact with axon debris and regenerating axons. Its two functions occur through distinct biochemical mechanisms; extracellular domain-mediated adhesion for regeneration and extracellular domain binding-induced intracellular domain signaling for debris removal. These studies identify CED-1 in engulfing cells as a receptor in debris removal but as an adhesion molecule in neuronal regeneration, and have important implications for understanding neural circuit repair after injury.

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