In this study we made use of the Reverse transcription-polymerase chain reaction to analyze the expression of mRNA for the five subtypes of muscarinic acetylcholine receptors in human blood mononuclear cells. mRNA for m3, m4 and m5 subtypes was detected, while mRNA for m1 and m2 muscarinic receptors was not found. Similar results were obtained for three different healthy human subjects studied. Interestingly, the m5 subtype was expressed at higher levels in blood mononuclear cells than in cerebral cortex. To our knowledge this is the first time that m5 muscarinic receptor mRNA has been found outside of the central nervous system.
Identification of m3, m4 and m5 subtypes of muscarinic receptor mRNA in human blood mononuclear cells / Costa, P; Auger, C. B; Traver, D. J; Costa, L. G.. - In: JOURNAL OF NEUROIMMUNOLOGY. - ISSN 0165-5728. - 60:1-2(1995), p. 45-51.
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