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Journal of Histochemistry and Cytochemistry, Vol. 48, 295-302, February 2000, Copyright © 2000, The Histochemical Society, Inc.

TECHNICAL NOTE

PS-100 and NF 70-200 Double Immunolabeling for Human Digital Skin Meissner Corpuscle 3D Imaging

Didier Guinarda, Yves Ussonb, Christiane Guillermetc, and Raymond Saxodd
a Equipe de Neurobiologie du Développement LAPSEN-U Inserm 318, Université Joseph Fourier
b TIM C UMR 5525 CNRS, Institut Albert Bonniot, Université Joseph Fourier
c Laboratoire de Pathologie Cellulaire, Centre Hospitalier Universitaire de Grenoble
d Equipe de Neurobiologie du Développement LAPSEN-U Inserm 318, Université Joseph Fourier, Grenoble, France

Correspondence to: Didier Guinard, Equipe de Neurobiologie du Développement, LAPSEN-U Inserm 318, Université Joseph Fourier, BP 217, 38043 Grenoble Cedex 9, France.

For detailed study of complex structures such as corpuscular mechanoreceptors, confocal microscopy can be used with multiple immunolabeling that identifies specifically different subcomponents. In addition, anatomic interpretation is enhanced by three-dimensional reconstruction. Confocal laser micrographs, reconstructed from serial images 1 µm thick of human skin Meissner corpuscles simultaneously immunostained for neurofilaments (NF 70-200) and protein S-100 (PS-100), clearly reveal the complex 3D relationship between Schwann-related lamellar cells immunoreactive for PS-100 and the nerve fibers marked by NF 70-200. The nerve fiber, after branching into the corpuscle, divides into several ramifications, presenting discoidal expansions and flattened fringed sections. The mean nerve diameter was 4 µm ± 1 (2–5 µm) and the mean size of the discoidal expansions was 15 µm ± 1 (7–30 µm). Corpuscle size varied from 30–140 ± 1 µm in length and from 20–60 ± 1 µm in diameter. This study confirms the presence of neural discoidal areas in Meissner's corpuscles, which are probably involved to some extent with the transduction process. Despite the accuracy of immunolabeling and imaging, an extracorpuscular neural network was never observed in the vicinity of corpuscles, thus giving doubt as to their existence. (J Histochem Cytochem 48:295–302, 2000)

Key Words: Meissner corpuscles, immunolabeling, confocal microscopy, mechanoreceptors, 3D reconstruction, cutaneous innervation, finger


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