Dataset Information

Prolonged fasting/refeeding modifies proteome profile and parvalbumin expression in the fast-twitch muscle of pacu (Piaractus mesopotamicus)

ABSTRACT: Skeletal muscle in fish presents a high plasticity controlled by a dynamic balance between anabolic and catabolic signaling pathways. Decreased food availability can inhibit muscle growth and trigger muscle catabolism pathways, thu promoting muscle atrophy. In contrast, anabolism may be favored during restoration of food supply, promoting the muscle growth. Considering this, we analyzed fast-twitch muscle of juvenile Piaractus mesopotamicus (pacu) submitted to a prolonged fasting (30 days) and refeeding (up to 30 days) using shotgun proteomics and gene expression analysis. The relative rate of weight and length increase, as well as the expression of mafbx and igf -1 genes, suggest that prolonged fasting caused muscle atrophy and that 30 days of refeeding led to partial compensatory growth. Shotgun proteomics analysis identified 99 proteins after fasting and 71 proteins after refeeding periods, of which 23 and 17 were differentially expressed after fasting and after 30 days of refeeding, respectively. Most of these differentially expressed proteins were related to cytoskeleton, muscle contraction and muscle metabolism. Among these, parvalbumin (PVALB), a calcium-binding protein and food allergen, was selected for further RT-qPCR analysis, which showed that pvalb mRNA was not changed after 30 days of fasting and 30 days of refeeding, but it was downregulated after 6h and 24h of refeeding. This suggests a post-transcriptional regulation of PVALB in fish muscle. In conclusion, our results suggest that muscle atrophy and partial compensatory growth caused by prolonged fasting and refeeding affected the muscle proteome and PVALB expression. Our results can contribute to the understanding of muscle anabolic and catabolic pathways in response to changes in food availability.

INSTRUMENT(S): Q-Tof Premier

ORGANISM(S): Piaractus Mesopotamicus

TISSUE(S): White Muscle

SUBMITTER: Maria Laura Gabriel Kuniyoshi

LAB HEAD: Maeli Dal-Pai-Silva

PROVIDER: PXD014232 | Pride | 2019-11-28

REPOSITORIES: Pride

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			Action	DRS
	15agosto_Rafaela_1_1_rep.raw.zip	Raw
	15agosto_Rafaela_1_2.raw.zip	Raw
	15agosto_Rafaela_1_3.raw.zip	Raw
	15agosto_Rafaela_2_1.raw.zip	Raw
	15agosto_Rafaela_2_2.raw.zip	Raw

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Prolonged fasting followed by refeeding modifies proteome profile and parvalbumin expression in the fast-twitch muscle of pacu (Piaractus mesopotamicus).

da Silva-Gomes Rafaela Nunes RN Gabriel Kuniyoshi Maria Laura ML Oliveira da Silva Duran Bruno B Thomazini Zanella Bruna Tereza BT Paccielli Freire Paula P Gutierrez de Paula Tassiana T de Almeida Fantinatti Bruno Evaristo BE Simões Salomão Rondinelle Artur RA Carvalho Robson Francisco RF Delazari Santos Lucilene L Dal-Pai-Silva Maeli M

PloS one 20191219 12

Here, we analyzed the fast-twitch muscle of juvenile Piaractus mesopotamicus (pacu) submitted to prolonged fasting (30d) and refeeding (6h, 24h, 48h and 30d). We measured the relative rate of weight and length increase (RRIlength and RRIweight), performed shotgun proteomic analysis and did Western blotting for PVALB after 30d of fasting and 30d of refeeding. We assessed the gene expression of igf-1, mafbx and pvalb after 30d of fasting and after 6h, 24h, 48h and 30d of refeeding. We performed a ...[more]

PMID: 31856193

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