Woman skeletal muscle transcriptome with bed rest and countermeasures.

Metadata Updated: November 12, 2020

Microgravity has a dramatic impact on human physiology illustrated in particular with skeletal muscle impairment. A thorough understanding of the mechanisms leading to loss of muscle mass and structural disorders is necessary for the definition of efficient clinical and spaceflight countermeasures. We investigated the effects of long-term bed rest on transcriptome of soleus (SOL) and vastus lateralis (VL) muscles in healthy women (BRC group n=8) and the potential beneficial impact of protein supplementation (BRN group n=8) and of a combined resistance and aerobic training (BRE group n=8). Gene expression profiles were obtained using an in-house made microarray containing 6681 muscles-relevant genes. A two-class statistical analysis was applied on the 2103 genes with consolidated expression. We identified 472 and 207 modified genes respectively for SOL and VL in BRC group. Further clustering approaches identifying relevant biological mechanisms or pathways underlined five main subclusters. Three are composed almost of upregulated genes involved mainly in nucleic acid and protein metabolism and two composed almost of downregulated genes involved in energy metabolism. Exercise countermeasure demonstrated a drastic compensatory effect decreasing the number of differentially-expressed genes by 89 and 96% in SOL and VL. In contrast nutrition countermeasure had a moderate effect and decreased the number of differentially-expressed genes by 40 and 25% in SOL and VL. Our results allowed reporting a systematic global and comprehensive view of long-term woman muscle atrophy and brought new lights and insights for space environment and for women who undergo a long-term clinical bed rest. Biological samples were collected from Pre- and Post- bed rest (BR) soleus and vastus lateralis biopsies of each subject from the three groups (bed rest only: BRC; Exercise: BRE; Nutrition: BRN). six technical replicate values (2 duplicate hybridizations a et b to chips with triplicate spots xxx) were obtained for each skeletal muscle sample. Thus for each subject 12 expression measurements (6 before BR and 6 after BR) were obtained for each muscle.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Data Update Frequency irregular

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher National Aeronautics and Space Administration
Unique Identifier Unknown
Maintainer
Identifier nasa_genelab_GLDS-51
Data First Published 2018-06-26
Data Last Modified 2020-01-29
Category Earth Science
Public Access Level public
Data Update Frequency irregular
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Homepage URL https://data.nasa.gov/d/rpve-yf52
Program Code 026:005
Source Datajson Identifier True
Source Hash fc655ea4b5d727c9ed62f847df0b44cd34ee4b94
Source Schema Version 1.1

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