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- Title
Metabolomic Expression of Laryngeal and Hindlimb Muscles in Adult versus Senescent Rats.
- Authors
Shembel, Adrianna C.; Siu, Yik; Lhakhang, Tenzin; Ash, Leonard; Jones, Drew; Johnson, Aaron M.
- Abstract
Objectives: (1) Determine the feasibility of obtaining a global, unbiased metabolomic profile on laryngeal muscle in a rat model; (2) evaluate the impact of biological aging on the laryngeal metabolome; and (3) characterize biochemical expression differences between aged and non-aged laryngeal and hindlimb muscle. Methods: Thyroarytenoid laryngeal muscle and plantaris hindlimb muscle were harvested from 5 young adult (9 months old) and 5 older adult (32 months old) F344BN rats. Tissue was processed and analyzed using LC-MS methods. Detected metabolites were compared to widely used metabolite databases and KEGG pathway enrichment was performed on significant metabolites. Results: The greatest differences in metabolite expression were between laryngeal and limb muscle with 126 different metabolites found between laryngeal and limb within the young group and 149 different metabolites within the old group. Significant hits between muscle groups highlighted amino acid differences between these tissues. There were more robust differences with age in limb muscle compared to laryngeal muscle. Conclusions: Amino acid metabolism is a key difference between muscles of the limbs and larynx. Due to the number of differentially expressed metabolites between the 2 muscle groups, caution should be exercised when applying skeletal limb muscle physiology and biology concepts to the vocal muscles in both aged and non-aged musculoskeletal systems. Mechanisms underlying less robust effects of age on laryngeal muscle compared to limb muscle require elucidation.
- Subjects
SKELETAL muscle physiology; AMINO acid metabolism; BIOLOGICAL models; SKELETAL muscle; METABOLOMICS; ANIMAL experimentation; LIQUID chromatography; RATS; BIOINFORMATICS; AGING; MASS spectrometry; METABOLITES; LARYNGEAL muscles; ORGAN donation; EVALUATION
- Publication
Annals of Otology, Rhinology & Laryngology, 2022, Vol 131, Issue 3, p259
- ISSN
0003-4894
- Publication type
Article
- DOI
10.1177/00034894211014692