An NF-κB--EphrinA5-Dependent Communication between NG2(+) Interstitial Cells and Myoblasts Promotes Muscle Growth in Neonates

Developmental Cell
Jin-Mo GuDenis C Guttridge

Abstract

Skeletal muscle growth immediately following birth is critical for proper body posture and locomotion. However, compared with embryogenesis and adulthood, the processes regulating the maturation of neonatal muscles is considerably less clear. Studies in the 1960s predicted that neonatal muscle growth results from nuclear accretion of myoblasts preferentially at the tips of myofibers. Remarkably, little information has been added since then to resolve how myoblasts migrate to the ends of fibers. Here, we provide insight into this process by revealing a unique NF-κB-dependent communication between NG2(+) interstitial cells and myoblasts. NF-κB in NG2(+) cells promotes myoblast migration to the tips of myofibers through cell-cell contact. This occurs through expression of ephrinA5 from NG2(+) cells, which we further deduce is an NF-κB target gene. Together, these results suggest that NF-κB plays an important role in the development of newborn muscles to ensure proper myoblast migration for fiber growth.

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Jan 8, 2017·Cold Spring Harbor Perspectives in Biology·Robert S KraussAviva J Goel
Jun 22, 2017·Development·Jérome Chal, Olivier Pourquié
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Jun 24, 2021·Nature Communications·Joana Esteves de LimaDelphine Duprez
Nov 16, 2021·Frontiers in Cell and Developmental Biology·Zachary FralishNenad Bursac

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