TY - JOUR
T1 - Effect of nitric oxide on mucin production in experimental otitis media
AU - Martin, Paul
AU - Choi, Duk Joo
AU - Jinn, Tae Hoon
AU - Cohen, Joshua G.
AU - John, Earnest O.
AU - Moorehead, Morrill T.
AU - Kaura, Claire S.
AU - Kaura, Samantha H.
AU - Jung, Timothy T.K.
N1 - OBJECTIVE: The purpose of this study was to determine the role of nitric oxide (NO) in the pathogenesis of mucold otitis media (OM) in lipopolysaccha-ride (LPS)-induced OM. METHODS: OM was induced in chinchillas by injecting S-nitroso-N-acetylpenicillamine (SNAP), LPS, and LPS + SNAP into the superior bullae.
PY - 2004/2
Y1 - 2004/2
N2 - 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 concentratlon 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.
AB - 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 concentratlon 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.
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U2 - 10.1016/j.otohns.2003.09.019
DO - 10.1016/j.otohns.2003.09.019
M3 - Article
C2 - 14990923
SN - 0194-5998
VL - 130
SP - 249
EP - 254
JO - Otolaryngology- Head and Neck Surgery
JF - Otolaryngology- Head and Neck Surgery
IS - 2
ER -