PMID: 9449486Feb 4, 1998Paper

The t(2;5)-associated p80 NPM/ALK fusion protein in nodal and cutaneous CD30+ lymphoproliferative disorders

Journal of Cutaneous Pathology
L D SuT P Singleton

Abstract

A high percentage of extracutaneous CD30+ anaplastic large cell lymphomas (nodal ALCL) carry a specific chromosomal translocation, t(2;5) (p23;q35), that results in abnormal expression of p80 NPM/ALK chimeric protein (p80). The protein p80 may be detected by immunohistochemistry using polyclonal (anti-p80) or monoclonal (ALK1) antibody directed against the ALK epitope. Although nodal ALCL, primary cutaneous ALCL, and lymphomatoid papulosis type A (lyp A) have similar histologic and immunohistochemical features, the expression of p80 in these cutaneous lesions has not been extensively studied. We immunostained tissues from 10 nodal ALCL, 8 primary cutaneous ALCL, 24 lyp A, and positive and negative controls using polyclonal rabbit anti-p80 and the avidin-biotin-peroxidase labeling method. Reactivity was determined by comparing staining intensity to positive controls [4 nodal ALCL with t(2;5)] and negative controls (21 non-ALCL lymphomas). Only cutaneous lesions staining positively with anti-p80 were further studied with the monoclonal antibody ALK1 and reverse transcription polymerase chain reaction (RT-PCR) for p80 messenger RNA. All positive controls (4/4), but none of the negative controls (0/21) nor lyp A (0/24), were immuno...Continue Reading

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Citations

Apr 25, 2012·Der Hautarzt; Zeitschrift für Dermatologie, Venerologie, und verwandte Gebiete·D HummeC Assaf
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