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The expression of desmosomal and corneodesmosomal antigens shows specific variations during the terminal differentiation of epidermis and hair follicle epithelia

V Mils, C Vincent, F Croute and G Serre

Laboratoire de Biologie Cellulaire, Faculte de Medecine Purpan, Toulouse, France.

Using five monoclonal antibodies (MAb), we studied by indirect immunofluorescence the desmosomes and a junctional structure specific to cornified layers, the corneodesmosome, in normal and plantar epidermis and in the various sheaths of the anagen hair follicle. The monoclonal antibodies DP1&2.2-15, PG5.1, and DG3.10, specific for desmoplakins I/II, plakoglobin, and desmoglein I, respectively, were used to study the desmosome antigens, and G36-19 and G20-21 to study the corneodesmosome antigens. The distribution and sequence of expression of the five antigens allowed the nine epithelial differentiation pathways studied to be merged into four distinct families: non-plantar epidermis, characterized by the absence of desmosome and corneodesmosome antigens in the stratum corneum; the outer root sheath of the hair follicle, which behaves like the viable layers of the epidermis with regard to the desmosome antigens but does not express the corneodesmosome antigens; plantar epidermis and the three components of the inner root sheath in which the corneodesmosome antigens are present up to the desquamating layer; and the three components of the hair shaft, which are characterized by the absence of expression of both the desmosome and the corneodesmosome antigens in its mature portion.

Volume 40, Issue 9, pp. 1329-1337, 09/01/1992
Copyright © 1992 by The Histochemical Society


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