Dataset Information

Quantitative LC-MSMS of human muscle cells after electrical pulse stimulation

ABSTRACT: We hypothesized that muscle contraction produces a cellular stress signal capable to increase lipolysis to sustain fuel availability during exercise. The aim of the present study was to identify novel exercise-regulated myokines, aka exerkines, able to promote lipolysis in human adipocytes. To this end, human primary myotubes from lean healthy volunteers were submitted to electrical pulse stimulation to mimic either acute intense or chronic moderate exercise. Conditioned media experiments with hMADS adipocytes were performed. Unbiased proteomic and ELISA analyses were applied in conditioned media and human plasma samples. Real-time qPCR was performed in cultured myotubes and muscle biopsy samples.

INSTRUMENT(S): Q Exactive Plus

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Skeletal Muscle, Myotube

SUBMITTER: Fabrice BERTILE

LAB HEAD: Sarah Cianférani

PROVIDER: PXD014126 | Pride | 2020-05-26

REPOSITORIES: Pride

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Growth and differentiation factor 15 is secreted by skeletal muscle during exercise and promotes lipolysis in humans.

Laurens Claire C Parmar Anisha A Murphy Enda E Carper Deborah D Lair Benjamin B Maes Pauline P Vion Julie J Boulet Nathalie N Fontaine Coralie C Marquès Marie M Larrouy Dominique D Harant Isabelle I Thalamas Claire C Montastier Emilie E Caspar-Bauguil Sylvie S Bourlier Virginie V Tavernier Geneviève G Grolleau Jean-Louis JL Bouloumié Anne A Langin Dominique D Viguerie Nathalie N Bertile Fabrice F Blanc Stéphane S de Glisezinski Isabelle I O'Gorman Donal D Moro Cedric C

JCI insight 20200326 6

We hypothesized that skeletal muscle contraction produces a cellular stress signal, triggering adipose tissue lipolysis to sustain fuel availability during exercise. The present study aimed at identifying exercise-regulated myokines, also known as exerkines, able to promote lipolysis. Human primary myotubes from lean healthy volunteers were submitted to electrical pulse stimulation (EPS) to mimic either acute intense or chronic moderate exercise. Conditioned media (CM) experiments with human adi ...[more]

PMID: 32106110

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Project description:Belt electrode-skeletal muscle electrical stimulation (B-SES) involves the use of belt-shaped electrodes to simultaneously contract multiple muscle groups. Twitch contractions have been demonstrated to protect against denervation-induced muscle atrophy in rats, possibly via mitochondrial biosynthesis. In this study, we examined whether inducing tetanus contractions with B-SES suppresses muscle atrophy and identified the underlying molecular mechanisms. We evaluated the effects of acute (60 Hz, 5 min) and chronic (60 Hz, 5 min, every alternate day for 1 week) B-SES on the tibialis anterior (TA) and gastrocnemius (GAS) muscles in Sprague Dawley rats using belt electrodes attached to both ankle joints. In acute stimulation, a significant decrease in glycogen content in the left and right TA and GAS was observed, suggesting that B-SES causes simultaneous contractions in multiple muscle groups. B-SES also enhanced p70S6K phosphorylation, an indicator of the mechanistic target of rapamycin complex 1 activity. During chronic stimulations, rats were divided into control (CONT), denervation-induced atrophy (DEN), and DEN+electrically stimulated with B-SES (DEN＋ES) groups. After 7 days of treatment, muscle wet weight (n = 8-11 for each group) and muscle fiber cross-sectional area (CSA, n = 6 for each group) of the TA and GAS muscles were reduced in the DEN and DEN+ES groups compared to those in the CON group. The DEN+ES group showed significantly higher muscle weight and CSA than the DEN group. Although RNA-seq and pathway analysis suggested that mitochondrial and ribosome biogenesis are key events in this phenomenon, mitochondrial content showed no difference. In contrast, ribosomal RNA 28S and 45S (n = 6) levels in the DEN+ES group were higher than those in the DEN group. The mRNA levels of the muscle proteolytic molecules Atrogin-1 and MuRF1 were significantly higher in DEN than in CONT but were suppressed in DEN+ES. In conclusion, tetanic electrical stimulation of both ankles using belt electrodes was effective in preventing denervation-induced atrophy in multiple muscle groups. Unlike twitch contractions, ribosomal biosynthesis plays a key role in tetanic contractions to prevent muscle atrophy.

			Action	DRS
	MQresults_Myotubes_EPS_secretome.zip	Other
	QE17863PAM.raw	Raw
	QE17864PAM.raw	Raw
	QE17865PAM.raw	Raw
	QE17866PAM.raw	Raw