Cellular and subcellular distribution of 7B2 in porcine Merkel cells

The Anatomical Record
A García-CaballeroA Beiras

Abstract

Merkel cells are neuroendocrine cells located in the skin and oral mucosa of various mammalian species. These cells express multiple peptides as well as serotonin. Although the precise function of Merkel cells is still unknown, different studies support its role as mechano-electric transducer. 7B2 granin (secretogranin V) is a polypeptide isolated from the pituitary gland and present in the dense-cored granules of neuronal and paraneuronal cells. The expression of the 7B2 in Merkel cells of pig snout skin was analysed by immunohistochemical techniques. The streptavidin-biotin peroxidase complex procedure was employed for light microscopy. A postembedding method using immunoglobulin-colloidal gold complexes was employed for the ultrastructural studies. Immunoreactivity for 7B2 was observed in virtually all Merkel cells, both in epidermis and vibrissae. The immunostaining was shown in the basal side of cytoplasms where neuroendocrine granules were accumulated. Immunoelectron microscopy allowed us to demonstrate that 7B2 labelling was located on the electrondense granules. Nuclei and epidermal nerve terminals associated with merkel cells did not show immunoreactivity. The polypeptide 7B2 is present in the dense-cored granules of M...Continue Reading

References

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Citations

Sep 28, 2004·Proceedings of the National Academy of Sciences of the United States of America·Henry HaeberleEllen A Lumpkin
Jul 6, 2001·The Biochemical Journal·M MbikayM Chrétien
Apr 7, 2007·Journal of the American Academy of Dermatology·Nicholas Boulais, Laurent Misery
Dec 31, 2015·Oncotarget·Begoña O AlénYolanda Pazos
May 28, 2014·Experimental Dermatology·Ying XiaoIsaac Brownell

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