July 28, 2015PLoS ONEOpen Access

Differentiation-Associated Downregulation of Poly(ADP-Ribose) Polymerase-1 Expression in Myoblasts Serves to Increase Their Resistance to Oxidative Stress

Q: What are the key findings of this study?

Downregulation of PARP-1 expression during skeletal muscle differentiation from myoblasts to myotubes significantly increases cellular resistance to oxidative stress and preserves mitochondrial function.

Q: What is the clinical evidence from this study?

Study design: Other. Population: Oxidative stress in skeletal muscle. Intervention: Myoblast differentiation and PARP-1 inhibition (PJ34) vs. Undifferentiated myoblasts and untreated controls. Primary outcome: Cell viability and mitochondrial function under oxidative stress (MTT and LDH assays) (p=<0.05).

Q: What does this research mean for the field?

Downregulation of PARP-1 expression during the differentiation of myoblasts to myotubes confers increased resistance to oxidative stress and preserves mitochondrial function. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

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Key result

PARP-1 downregulation during skeletal muscle differentiation increases oxidative stress resistance and preserves mitochondrial function.

P<0.05

Population

Murine skeletal muscle differentiation model (C2C12 cells) and rat-derived skeletal muscle cell line (L6)

Comparison

Differentiation into myotubes, PARP-1 inhibition… vs Undifferentiated myoblasts

Design

Preclinical

Authors

GOGábor OláhEötvös Loránd University BSBartosz SzczęsnyThe University of Texas Medical Branch at Galveston ABAttila BrunyánszkiCDG Therapeutics (United States)

Discussion

Member takes

Implication

PARP-1 downregulation may protect myotubes from oxidative stress in vitro; leaves open translation to human muscle disease or therapies.

Structured PICO

Population

In vitro study utilizing murine C2C12 and rat L6 skeletal muscle cell lines to evaluate the role of PARP-1 expression during cellular differentiation and its impact on oxidative stress resistance.

Intervention

Differentiation into myotubes, PARP-1 inhibition by PJ34, and forced overexpression of PARP1

Comparator

Undifferentiated myoblasts

Outcome

Resistance to oxidative stress (assessed by MTT and LDH assays, mitochondrial membrane potential, and respiration)surrogate

Main Result

p-value: p=<0.05

Downregulation of PARP-1 during skeletal muscle differentiation serves as a protective mechanism to maintain cellular functions and mitochondrial integrity during oxidative stress.

Limitations

In vitro study design using immortalized cell lines may not fully replicate in vivo skeletal muscle physiology and complex tissue-level responses to oxidative stress.

Cite This Study

Oláh et al. (2015) studied Oxidative stress in skeletal muscle. Myoblast differentiation and PARP-1 inhibition (PJ34) vs. Undifferentiated myoblasts and untreated controls was evaluated on Cell viability and mitochondrial function under oxidative stress (MTT and LDH assays) (p=<0.05). Downregulation of PARP-1 expression during skeletal muscle differentiation from myoblasts to myotubes significantly increases cellular resistance to oxidative stress and preserves mitochondrial function.

synapsesocial.com/papers/6aa92c9aaa112b81ac0c07ac https://doi.org/10.1371/journal.pone.0134227

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Differentiation-Associated Downregulation of Poly(ADP-Ribose) Polymerase-1 Expression in Myoblasts Serves to Increase Their Resistance to Oxidative Stress

Discussion

Member takes

Implication

Structured PICO

Main Result

Limitations

Cite This Study

Differentiation-Associated Downregulation of Poly(ADP-Ribose) Polymerase-1 Expression in Myoblasts Serves to Increase Their Resistance to Oxidative Stress

Discussion

Member takes

Implication

Structured PICO

Main Result

Limitations

Cite This Study

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