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Valiante, S. et al.

Valiante, Capaldo, Virgilio, Sciarrillo, De Falco, Gay, Laforgia, Varano,

Distribution of alpha7 and alpha4 nicotinic acetylcholine receptor subunits in several tissues of Triturus carnifex (Amphibia, Urodela).

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.[1]

References

Distribution of alpha7 and alpha4 nicotinic acetylcholine receptor subunits in several tissues of Triturus carnifex (Amphibia, Urodela). Valiante, S., Capaldo, A., Virgilio, F., Sciarrillo, R., De Falco, M., Gay, F., Laforgia, V., Varano, L. Tissue & cell. (2004) [Pubmed]

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