The distribution of sympathetic adrenergic, tyrosine hydroxylase- and neuropeptide Y-immunoreactive nerves in human axillary sweat glands

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Abstract
The innervation of human axillary sweat glands was studied by using the specific SPG (sucrose-potassium phosphate-glyoxylic acid) catecholamine histofluorescence method and the peroxidase-antiperoxidase (PAP) immunocytochemical method. The present results demonstrated that human sweat glands are surrounded by nerves containing a weak tyrosine hydroxylase activity. Nerves showing catecholamine histofluorescence could be visualized around the sweat glands only in the presence of exogenous catecholamine (adrenaline in the local anestheticum). In all tissue specimens studied fluorescent adrenergic nerves could be seen around arteries and arterioles corresponding to the distribution of neuropeptide Y-like immunoreactive nerves.

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