Summary
A sequential double immunoenzymic staining procedure was developed using the monoclonal antibody anti-BrdUrd and Ki67 in order to determine whether hyperproliferative skin disorders, such as psoriasis, are characterized by an increased growth fraction rather than a much shorter cell cycle time of all germinative cells. Ki67 binds to a proliferation-associated nuclear antigen in a variety of human cell types, and anti-BrdUrd can be used to identify DNA-synthesizing cells. Although in hyperproliferative epidermis the absolute numbers of BrdUrd-positive cells as well as Ki67-positive cells were grossly increased, the ratio of these values was not changed compared to the ratio found in the epidermis of the clinically uninvolved skin of psoriatic patients and in normal epidermis. This suggests an increased growth fraction in hyperproliferative epidermis.
Our data show that immunohistochemical double-staining techniques can be a valuable tool in the study of cell cycle kinetics in epithelial tissues.
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Van Erp, P.E.J., De Mare, S., Rijzewijk, J.J. et al. A sequential double immunoenzymic staining procedure to obtain cell kinetic information in normal and hyperproliferative epidermis. Histochem J 21, 343–347 (1989). https://doi.org/10.1007/BF01798497
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DOI: https://doi.org/10.1007/BF01798497