title: Progranulin regulates zebrafish muscle growth and regeneration through maintaining the pool of myogenic progenitor cells.
abstract: Myogenic progenitor cell (MPC) is responsible for postembryonic muscle growth and regeneration. Progranulin (PGRN) is a pluripotent growth factor that is correlated with neuromuscular disease, which is characterised by denervation, leading to muscle atrophy with an abnormal quantity and functional ability of MPC. However, the role of PGRN in MPC biology has yet to be elucidated. Here, we show that knockdown of zebrafish progranulin A (GrnA) resulted in a reduced number of MPC and impaired muscle growth. The decreased number of Pax7-positive MPCs could be restored by the ectopic expression of GrnA or MET. We further confirmed the requirement of GrnA in MPC activation during muscle regeneration by knockdown and transgenic line with muscle-specific overexpression of GrnA. In conclusion, we demonstrate a critical role for PGRN in the maintenance of MPC and suggest that muscle atrophy under PGRN loss may begin with MPC during postembryonic myogenesis.
authors: Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 115, Taiwan.
authors: Yen-Hsing
authors: YH
authors: Li
authors: Hsu-Yu
authors: HY
authors: Chen
authors: Ya-Wen
authors: YW
authors: Li
authors: Sung-Yu
authors: SY
authors: Wu
authors: Wangta-Liu
authors: Gen-Hwa
authors: GH
authors: Lin
authors: Shao-Yang
authors: SY
authors: Hu
authors: Zen-Kuei
authors: ZK
authors: Chang
authors: Hong-Yi
authors: HY
authors: Gong
authors: Chia-Hsuan
authors: CH
authors: Liao
authors: Keng-Yu
authors: KY
authors: Chiang
authors: Chang-Wen
authors: CW
authors: Huang
authors: Jen-Leih
authors: JL
authors: Wu
mesh_terms: D000818:Animals; D030801:Animals, Genetically Modified / Q000254:growth & development; D017209:Apoptosis; D049109:Cell Proliferation; D004179:Cobra Cardiotoxin Proteins / Q000633:toxicity; D005786:Gene Expression Regulation / Q000187:drug effects; D055785:Gene Knockdown Techniques; D036341:Intercellular Signaling Peptides and Proteins / Q000235:genetics / Q000378:metabolism*; D024510:Muscle Development / Q000502:physiology*; D018482:Muscle, Skeletal / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology; D051763:PAX7 Transcription Factor / Q000378:metabolism; D019859:Proto-Oncogene Proteins c-met / Q000235:genetics / Q000378:metabolism; D012038:Regeneration / Q000502:physiology*; D013234:Stem Cells / Q000166:cytology / Q000378:metabolism*; D015027:Zebrafish / Q000254:growth & development; D029961:Zebrafish Proteins / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D000077153:Progranulins
chemical_list: D004179:Cobra Cardiotoxin Proteins; D036341:Intercellular Signaling Peptides and Proteins; D051763:PAX7 Transcription Factor; D019859:Proto-Oncogene Proteins c-met; D029961:Zebrafish Proteins; C509429:grna protein, zebrafish; D000077153:Progranulins
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