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  • Title: Immunofluorescence with Met-enkephalin and Leu-enkephalin antibodies in the guinea pig cochlea.
    Author: Eybalin M, Pujol R.
    Journal: Hear Res; 1984 Feb; 13(2):135-40. PubMed ID: 6370942.
    Abstract:
    We have applied an indirect immunofluorescence technique to cryostat sections of guinea pig cochleas using Met-enkephalin and Leu-enkephalin antisera. With both antisera, high immunofluorescence was seen in the inner spiral bundle, the tunnel spiral bundle and the intraganglionic spiral bundle. Immunoreactivity persisted to a dilution of 1/50 000. In three out of the twelve guinea pigs, immunoreactivity was observed under the outer hair cells, but only with the Met-enkephalin antiserum. Immunoreactivity of medium intensity was seen when the Met-enkephalin antiserum was pre-adsorbed by Leu-enkephalin. No immunoreactivity was seen when the Leu-enkephalin antiserum was pre-adsorbed by Met-enkephalin. After treatment of cochlear sections with acidic permanganate, immunoreactivity of medium intensity was still observed with the Leu-enkephalin antiserum. These observations indicate that Met-enkephalin and Leu-enkephalin co-exist in the cochlea in regions where efferent terminals are located, particularly in the inner spiral bundle below the inner hair cells.
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