CD52 expression in non-mycotic T- and NK/T-cell lymphomas.
CD52 antigen (Campath-1) is expressed in high density by lymphocytes and monocytes. Campath-1H or alemtuzumab, a human anti-CD52, has been shown to be effective in T-cell malignancies; however, there is very limited information on CD52 expression in T-cell lymphoma (TCL). This study retrospectively investigated 97 TCL cases by immunohistochemistry using paraffin sections to elucidate the CD52 expression rates in various TCL sub-types. Fourteen cases of angioimmunoblastic T-cell lymphoma (AITL) were excluded as there were no reliable criteria to differentiate whether the CD52-positive cells were neoplastic T-cells, which are usually small-sized, or the usually abundant, small-to-large residual/reactive B-cells in this lymphoma sub-type. In the remaining 83 tumors, CD52 was expressed in 29 (35%) tumors including 8/17 (47%) NK/T-cell lymphomas, 14/35 (40%) unspecified peripheral TCLs and 4/18 (22%) anaplastic large cell lymphomas. There was no statistical significance in CD52 expression in terms of patient age, gender, nodal vs extra-nodal presentation or tumor sub-types. The authors recommend performing CD52 immunostaining for future clinical trials of alemtuzumab on TCL patients and to correlate the staining results with treatment outcome.
Chang
Sheng-Tsung
ST
Department of Pathology, Chi-Mei Medical Center, Tainan, Taiwan.
Lu
Chin-Li
CL
Chuang
Shih-Sung
SS
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015703:Antigens, CD / Q000378:metabolism*; D000951:Antigens, Neoplasm / Q000378:metabolism*; D000074301:CD52 Antigen; D002648:Child; D005260:Female; D006023:Glycoproteins / Q000378:metabolism*; D006801:Humans; D007694:Killer Cells, Natural / Q000378:metabolism / Q000473:pathology; D016399:Lymphoma, T-Cell / Q000378:metabolism* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
D015703:Antigens, CD; D000951:Antigens, Neoplasm; D000074301:CD52 Antigen; C000613862:CD52 protein, human; D006023:Glycoproteins