The purpose of this study was to determine the physiological and biochemical properties of hindlimb muscles after hypoventilation (HPO) induced by bilateral phrenic nerve denervation. Male Wistar rats (10 weeks-old) underwent HPO by the phrenic nerve denervation at the cervical level or sham surgery. Analyses were performed 4, 8, and 12 weeks after the surgery. The myosin heavy chain (MHC) isoform profile and in vitro isometric contractile properties of the soleus (SOL) and extensor digitrum longus muscles (EDL) were analyzed. From the postoperative period, HPO induced characteristic changes in SpO2 such as hypoventilation disorder. After 12 weeks, significant increases in MHC1 and significant decreases in MHC2a were observed in the MHC isoform composition in SOL. Moreover, significant increases in MHC2a and significant decreases in MHC2b were also observed in the MHC isoform composition in EDL muscles in the HPO compared with sham (SHM) group. In our study, the tidal volume after unilateral phrenic nerve denervation decreased by approximately 12%, and that after bilateral phrenic nerve denervation decreased by approximately 35%. We concluded that the reduction in behavioral activity levels in the HPO group may have resulted in changes of the peripheral skeletal muscles as a result of disuse atrophy.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.2220/biomedres.34.321 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Absence of functional acid-α-glucosidase (GAA) leads to early-onset Pompe disease with cardiorespiratory and neuromuscular failure. A novel Pompe rat model ( ) was used to test the hypothesis that neonatal gene therapy with adeno-associated virus serotype 9 (AAV9) restores cardiorespiratory neuromuscular function across the lifespan. Temporal vein administration of AAV9-DES-GAA or sham (saline) injection was done on post-natal day 1; rats were studied at 6-12 months old.
View Article and Find Full Text PDFIncidence, Mechanism, and Management of Atrial Ablation Procedure Complications: A Literature Review.
Cardiol Rev
December 2024
Departments of Cardiology and Medicine, Westchester Medical Center, New York Medical College, Valhalla, NY.
The number of atrial catheter ablation procedures has significantly increased in recent years, becoming a first-line treatment modality for various supraventricular tachycardias due to their safety and efficacy. Complications, ranging from mild to life-threatening, can arise during different stages of the procedure, including vascular access complications (eg, hematoma or vascular fistula formation, retroperitoneal bleeding, etc.), thromboembolic complications (eg, stroke, transient ischemic attack, air embolism, etc.
View Article and Find Full Text PDFRegional Anesthesia Management in a Fontan Patient Presenting for Ambulatory Shoulder Surgery: A Case Report.
A A Pract
January 2025
From the Department of Anesthesia, Indiana University School of Medicine, Indianapolis, Indiana.
Interscalene blocks, commonly used for shoulder surgery analgesia, often cause transient phrenic nerve palsy, leading to hemi-diaphragmatic paresis. This complication is particularly problematic in patients with pulmonary comorbidities and has been extensively investigated. However, its impact on patients with Fontan physiology remains less understood with limited representation in the literature.
View Article and Find Full Text PDFDiaphragmatic Nerve Paralysis After Redo Aortic Valve Replacement That Improved Over Time and Led to Successful Ventilator Weaning: A Case Report.
Cureus
November 2024
Cardiovascular Surgery, Sapporo Medical University, Sapporo, JPN.
We report a 75-year-old female with a history of two heart operations: aortic valve replacement (St. Jude Medical 21 mm) at the age of 44 years for severe rheumatic aortic stenosis and mitral valve replacement (Carbomedics 29 mm) at the age of 51 years for rheumatic mitral regurgitation. Decades later, she presented with exertional dyspnea.
View Article and Find Full Text PDFHigh-density versus point-by-point electroanatomical activation mapping of a cranial vena cava tachycardia in a dog.
J Vet Cardiol
December 2024
Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, 930 Campus Road, Ithaca, NY, 14853, USA. Electronic address:
A seven-year-old, male intact Newfoundland was referred for catheter ablation of supraventricular tachycardia. Activation mapping was performed using an electroanatomical mapping system to visualize the activation wavefront in a color-coded fashion on an anatomical shell. Atrial flutter with an early-meets-late signal (i.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!