Abstract
The innervation of Meissner's corpuscles (Mc) is complex, consisting of different types of sensory nerve fibers. We investigated the neurochemistry of Mc in human digital skin by indirect immunofluorescence, using a wide panel of both general neuronal as well as neurotransmitter-related molecules. Structural proteins (protein gene product 9.5, neuron-specific enolase, neurofilament) were found to consistently label the entire neuronal component of Mc. Immunoreactivity for gamma-melanocyte stimulating hormone was detected in the large diameter fibers running spirally within the corpuscles, while a number of peptide transmitters (substance P, calcitonin gene-related peptide, neurokinin A, galanin, somatostatin) were found in the thin unmyelinated fibers in both intra- and extracorpuscular locations.
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