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  • Title: Distribution of alpha7 and alpha4 nicotinic acetylcholine receptor subunits in several tissues of Triturus carnifex (Amphibia, Urodela).
    Author: Valiante S, Capaldo A, Virgilio F, Sciarrillo R, De Falco M, Gay F, Laforgia V, Varano L.
    Journal: Tissue Cell; 2004 Dec; 36(6):391-8. PubMed ID: 15533454.
    Abstract:
    The distribution of neuronal and non-neuronal mRNAs for alpha7 and alpha4 nicotinic acetylcholine receptor subunits was investigated in Triturus carnifex tissues using the in situ hybridization approach. The findings reveal a composite pattern of expression only partially overlapping for the two subunits; subunit alpha7 seems to be expressed widely throughout nervous, gastrointestinal and skin tissues, while alpha4 is present in a restricted number of cells of nervous and gastrointestinal tissue. We also found a specific pattern for each subunit; alpha7 and alpha4 associated exclusively to the epidermal glands and hypophysis, respectively; this is probably due to alternative roles that nicotinic acetylcholine receptors play in regulating physiological functions of non-neuronal amphibian tissues, rather than as mere neurotransmitters in the nervous system.
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