Dataset Information

Matrisome age-related changes in the mouse gastrocnemius muscle

ABSTRACT: In recent years, thanks to the great development of mass spectrometry (MS)-based high-throughput proteomic techniques, a large-scale protein characterization is less challenging. Proteomic approaches have been successfully applied to SM in different experimental models [21–24]; however, to date, there is little information on ECM proteins and how they change during ageing. The identification and quantification of ECM components and their interactions are es-sential steps to understand the role of the matrisome in sarcopenia. In this context, we combined a proteomic approach (i.e., LC-MS/MS and bioinformatic analyses) with mor-phological and morphometrical evaluations at fluorescence and transmission electron microscopy of the gastrocnemius muscle in adult and old mice. This age range has been selected since it has been observed that most of changes in muscle protein expression take place after middle age. The gastrocnemius muscle was selected for analysis since it is prevalently composed of fast-twitch fibre, which are especially affected by atrophy during aging. Our findings highlighted several modifications of ECM protein composition and organization in old mice, which likely play a role in the alteration of muscle properties during aging.

INSTRUMENT(S): Q Exactive

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Skeletal Muscle

SUBMITTER: Francesco Demetrio Lofaro

LAB HEAD: Federica, Boraldi

PROVIDER: PXD027895 | Pride | 2022-02-17

REPOSITORIES: Pride

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Publications

Age-Related Changes in the Matrisome of the Mouse Skeletal Muscle.

Lofaro Francesco Demetrio FD Cisterna Barbara B Lacavalla Maria Assunta MA Boschi Federico F Malatesta Manuela M Quaglino Daniela D Zancanaro Carlo C Boraldi Federica F

International journal of molecular sciences 20210929 19

Aging is characterized by a progressive decline of skeletal muscle (SM) mass and strength which may lead to sarcopenia in older persons. To date, a limited number of studies have been performed in the old SM looking at the whole, complex network of the extracellular matrix (i.e., matrisome) and its aging-associated changes. In this study, skeletal muscle proteins were isolated from whole gastrocnemius muscles of adult (12 mo.) and old (24 mo.) mice using three sequential extractions, each one an ...[more]

PMID: 34638903

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Project description:Purpose: The goal of this study was to determine the gene expression changes that occur over 7 days in parralyzed muscle in response to isometric contraction elicited by electrical stimulation initiated 4 months after spinal cord injury and to compare such changes to those observed in a normal muscle subjected to overload. Methods: Electrical stimulation of the soleus and plantaris muscle was stimulated in female rats with complete transection of the spinal cord at the interspace between the 9th and 10th thoracic vertebrae. Stimulation was begun 16 weeks after spinal cord transection and produced near-isometric contraction of soleus, plantaris and tibialis anterior. Muscle was analyzed at 1, 2 and 7 days after starting exercise with electrical stimulation. To provide a baseline reference for gene expression at 16 weeks after spinal cord injury, muscle was also analysed from an additional group of spinal cord transected animals. One additional group of animals with a sham-spinal cord injury was included to provide information about gene expression in neurologically intact animals of similar age. In parallel studies, rats underwent bilateral gastrocnemius ablation to overload soleus and plantaris, or a sham ablation as a control. Muscle was analyzed at 1, 3 and 7 days after gastrocnemius ablation or sham-ablation. Gene expression was determined using Affymetrix Rat Exon microarrays. For each group of animals, microarray analysis was performed for soleus muscle for each of 3 separate animals, using one array per animal. Control sammples for the spinal cord injured groups included a group of animals with a Sham-spinal cord injury, and a group of spinal cord injured animals that did not get electrical stimulation. The comparator for determining fold-change expression values was the spinal cord injured group that did not receive electrical stimulation. For each day after gastrocnemius ablation, a control was included that received all procedures needed for this ablation except cutting the distal insertion of the gastrocnemius into the Achilles tendon to control for effects of the surgery on gene expression.

Dataset Information

Matrisome age-related changes in the mouse gastrocnemius muscle

Publications

Age-Related Changes in the Matrisome of the Mouse Skeletal Muscle.

Similar Datasets

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