Not All the Number of Skeletal Muscle Fibers is Determined Prenatally

Overview

Journal BMC Dev Biol

Publisher Biomed Central

Specialties Biology
Reproductive Medicine

Date 2015 Nov 13

PMID 26559169

Citations 13

Authors

Mingsen Li

Xingyu Zhou

Yaosheng Chen

Yaping Nie

Huaxing Huang

Hu Chen

Delin Mo

Affiliations

Soon will be listed here.

Abstract

Background: The investigation of skeletal muscle development is of importance in stock farming and biomedicine. It is still ambiguous that whether animals are born with the full set of skeletal muscle fibers or if the number of myofibers continues to increase postnatally.

Results: Here, an inducible lineage-tracing system was employed to monitor the changes of myofiber number in various skeletal muscles during development. We confirm that the total myofiber number of longissimus dorsi, gastrocnemius and rectus femoris is determined prenatally. However, tibialis anterior and extensor digitorum longus have a different development pattern, and their myofiber number still increases in the first postnatal week and then remains stable afterwards.

Conclusions: Our results highlight different development time frames of anatomically distinct skeletal muscles.

Citing Articles

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Three-dimensional mapping reveals heterochronic development of the neuromuscular system in postnatal mouse skeletal muscles.

Xu J, Zhu J, Li Y, Yao Y, Xuan A, Li D Commun Biol. 2022; 5(1):1200.

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Maternal Exercise Before and During Pregnancy Facilitates Embryonic Myogenesis by Enhancing Thyroid Hormone Signaling.

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