Related Experiment Video
Updated: Aug 26, 2026
Mucin Agarose Gel Electrophoresis: Western Blotting for High-molecular-weight Glycoproteins
Published on: June 14, 2016
Effect of nitric oxide on mucin production in experimental otitis media
Paul Martin1, Duk-Joo Choi, Tae-Hoon Jinn
1Division of Otolaryngology-Head adn Neck Surgery, Loma Linda University School of Medicine, Loma Linda, California, 92354, USA. tjung1790@aol.com
Objective:
The purpose of this study was to determine the role of nitric oxide (NO) in the pathogenesis of mucoid otitis media (OM) in lipopolysaccharide (LPS)-induced OM.
Methods:
OM was induced in chinchillas by injecting S-nitroso-N-acetylpenicillamine (SNAP), LPS, and LPS + SNAP into the superior bullae. Auditory brainstem response thresholds were measured every 24 hours. Samples of middle ear fluid were collected and analyzed for mucin by the periodic acid-Schiff method. At the end of each experiment, temporal bones were harvested for histopathologic study.
Results:
Mucin concentration was greatest in the LPS + the SNAP group and least in the SNAP-alone group. Auditory brainstem response threshold was highest in the LPS group and lowest in the SNAP group, although not significantly. Histopathology showed the greatest mucosal thickening and inflammation in the LPS + SNAP group.
Conclusion:
The addition of NO in LPS-induced OM increased the mucin concentration in middle ear fluid and increased mucosal thickness and inflammation in middle ear mucosa.
Significance:
In the OM disease process, NO may contribute to the pathogenesis of mucoid OM.
Related Concept Videos
01:28Nitric Oxide Signaling Pathway
01:16Drugs Used in Upper Respiratory Disorders: Overview
Antihistamines (e.g., Benadryl) block histamines from binding. Histamines are chemicals released during an allergic reaction in the body. As a...
01:23Upper Respiratory Drugs: Antitussives, Expectorants, and Mucolytics
Antitussives include codeine, dextromethorphan (Robitussin), and benzonatate (Tessalon). Codeine and dextromethorphan exert their effects centrally by suppressing the cough reflex center in the medulla. Benzonatate operates peripherally within the respiratory tract by anesthetizing...