Chen L, Shen Y, Xiong H, Guan Z, Si Y, Liang H, Zhu W, Cai Q. Role of PGC-1α in fiber type conversion in the palatopharyngeus muscle of OSA patients.
J Clin Lab Anal 2022;
36:e24551. [PMID:
35692078 PMCID:
PMC9279980 DOI:
10.1002/jcla.24551]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 05/14/2022] [Accepted: 05/29/2022] [Indexed: 11/10/2022] Open
Abstract
Background
Obstructive sleep apnea (OSA) has a high incidence and is harmful to health. It is characterized by repeated collapse of the upper airway. However, the mechanism underlying upper airway collapse is unclear.
Methods
Patients with OSA and chronic tonsillitis were studied. Pathological changes in palatopharyngeus muscle were detected. The expression of peroxisome proliferator‐activated receptor‐γ co‐activator‐1α (PGC‐1α) and nuclear respiratory factor‐1 (NRF‐1) in muscles was detected by PCR and Western blotting. Immunofluorescence staining was used to detect the expression of type I and type II myofibril.
Results
The structure of the palatopharyngeus muscle was changed, and the expression of PGC‐1α and NRF‐1 was decreased in the OSA group compared with that in the control group. The expression of PGC‐1α, NRF‐1, and type I myofibril in C2C12 myoblasts was decreased by intermittent hypoxia exposure. The expression of type I myofibril was decreased when knocking down PGC‐1α.
Conclusion
OSA patients exhibited pathological damage in palatopharyngeus muscle. PGC‐1α was involved in the fiber type conversion in palatopharyngeus muscle caused by intermittent hypoxia.
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