PXD039811-1

PXD039811 is an original dataset announced via ProteomeXchange.

Title	Hypoxia resistance is an inherent phenotype of the mouse flexor digitorum brevis skeletal muscle
Description	The various functions of skeletal muscle (movement, respiration, thermogenesis, etc.) require the presence of oxygen (O2). Inadequate O2 bioavailability (i.e., hypoxia) is detrimental to muscle function, and in chronic cases can result in muscle wasting. Current therapeutic interventions have proven largely ineffective to rescue skeletal muscle from hypoxic damage. However, our lab has identified a mammalian skeletal muscle that maintains proper physiological function in an environment depleted of O2. Using mouse models of in vivo hindlimb ischemia and ex vivo anoxia exposure, we observed the preservation of force production in the flexor digitorum brevis (FDB) while in contrast the extensor digitorum longus (EDL) and soleus muscles suffered loss of force output. Unlike other muscles, we found that the FDB phenotype is not dependent on mitochondria, which partially explains the hypoxia resistance. Muscle proteomes were interrogated using a discovery-based approach, which identified significantly greater expression of the transmembrane glucose transporter GLUT1 in the FDB as compared to the EDL and soleus. Through loss-and-gain-of-function approaches, we determined that GLUT1 is necessary for the FDB to survive hypoxia, but overexpression of GLUT1 was insufficient to rescue other skeletal muscles from hypoxic damage. Collectively, the data demonstrate that the FDB is uniquely resistant to hypoxic insults. Defining the mechanisms that explain the phenotype may provide insight towards developing approaches for preventing hypoxia-induced tissue damage.
HostingRepository	jPOST
AnnounceDate	2024-02-03
AnnouncementXML	Submission_2024-02-02_07:00:10.552.xml
DigitalObjectIdentifier
ReviewLevel	Non peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Kelsey Fisher-Wellman
SpeciesList	scientific name: Mus musculus (Mouse); NCBI TaxID: 10090;
ModificationList	S-carboxamidomethyl-L-cysteine; L-methionine sulfoxide; TMT6plex reporter+balance reagent N-acylated residue; TMT6plex reporter+balance reagent acylated N-terminal
Instrument	Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2023-02-02 09:32:19	ID requested
⏵ 1	2024-02-02 07:00:10	announced

Dataset with its publication pending

submitter keyword: skeletal muscle, FDB, hypoxia, proteome

Espen Spangenburg
lab head
Kelsey Fisher-Wellman
contact affiliation	East Carolina Diabetes and Obesity Institute
dataset submitter

jPOST dataset URI

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