Immunocytochemical detection of cyclin A and cyclin D in formalin-fixed, paraffin-embedded tissues: novel, pertinent markers of cell proliferation - PubMed (original) (raw)
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- PMID: 7838839
Immunocytochemical detection of cyclin A and cyclin D in formalin-fixed, paraffin-embedded tissues: novel, pertinent markers of cell proliferation
B Bodey et al. Mod Pathol. 1994 Oct.
Abstract
Cyclin proteins in association with cyclin-dependent protein kinase subunits represent a new class of potentially oncogenic serine/threonine protein kinases that function to execute critical cell cycle transitions in all eukaryotic cells. Characterized by dramatic fluctuations in abundance, which occur in accordance with the periodicity of the cell cycle, the expression patterns of specific cyclins provide a unique and relevant indicator of cellular activation and cell cycle progression. In this study, we introduce a series of monospecific antibodies that are selective for human cyclin A and cyclin D, respectively, and we assess the feasibility of utilizing these reagents for immunocytochemical analyses. Conditions were optimized for detecting cyclin A and cyclin D in formalin-fixed, paraffin-embedded sections of the postnatal human palatine tonsil, in which normal cell proliferation is well characterized. Subsequent studies demonstrated the performance of these antibodies in the examination of pediatric bone tumors, in which decalcification methods are additionally performed. In both cases, the proliferative status of individual cells was monitored with an exceedingly high degree of resolution. Taken together with the available biochemical data, the results of these studies reveal a novel means of characterizing the proliferative status of normal as well as neoplastic tissues. The demonstrated utility of these immunochemical reagents will potentially facilitate retrospective studies aimed at examining cell proliferation in a wide variety of archival histopathologic specimens.
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