RGD Reference Report - Depletion of the mRNA translation initiation inhibitor, programmed cell death protein 4 (PDCD4), impairs L6 myotube formation. - Rat Genome Database

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Depletion of the mRNA translation initiation inhibitor, programmed cell death protein 4 (PDCD4), impairs L6 myotube formation.

Authors: Maeda, Naomi  Abdullahi, Abdikarim  Beatty, Brendan  Dhanani, Zameer  Adegoke, Olasunkanmi A J 
Citation: Maeda N, etal., Physiol Rep. 2017 Sep;5(17). pii: 5/17/e13395. doi: 10.14814/phy2.13395.
RGD ID: 13782277
Pubmed: PMID:28899909   (View Abstract at PubMed)
PMCID: PMC5599859   (View Article at PubMed Central)
DOI: DOI:10.14814/phy2.13395   (Journal Full-text)

The mechanistic (mammalian) target of rapamycin complex 1 (mTORC1) signaling is vital for optimal muscle mass and function. Although the significance of mTORC1 in stimulating muscle growth is unequivocal, evidence in support of its role during muscle regeneration is less clear. Here, we showed that the abundance (protein and mRNA) of the mTORC1/S6K1 substrate, programmed cell death protein 4 (PDCD4), is upregulated at the onset of differentiation of L6 and C2C12 cells. The increase in PDCD4 was not associated with any changes in S6K1 activation, but the abundance of beta transducing repeat-containing protein (ß-TrCP), the ubiquitin ligase that targets PDCD4 for degradation, increased. Myoblasts lacking PDCD4 showed impaired myotube formation and had markedly low levels of MHC-1. Analysis of poly (ADP-ribose) Polymerase (PARP), caspase 7 and caspase 3 indicated reduced apoptosis in PDCD4-deficient cells. Our data demonstrate a role for PDCD4 in muscle cell formation and suggest that interventions that target this protein may hold promise for managing conditions associated with impaired myotube formation.



Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Casp3Ratstriated muscle cell differentiation  IEP  RGD 
Casp7Ratstriated muscle cell differentiation  IEP  RGD 

Objects Annotated

Genes (Rattus norvegicus)
Casp3  (caspase 3)
Casp7  (caspase 7)


Additional Information