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Blood, 29 January 2009, Vol. 113, No. 5, pp. 1071-1074.
Prepublished online as a Blood First Edition Paper on October 27, 2008; DOI 10.1182/blood-2008-07-166363.
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LYMPHOID NEOPLASIA
Brief Report
Gene expression profiling of peripheral T-cell lymphoma including  T-cell lymphoma
Kana Miyazaki1,
Motoko Yamaguchi1,
Hiroshi Imai2,
Tohru Kobayashi1,
Satoshi Tamaru1,
Kazuhiro Nishii1,
Masao Yuda3,
Hiroshi Shiku4, and
Naoyuki Katayama1
Departments of 1 Hematology and Oncology,
2 Pathologic Oncology,
3 Medical Zoology, and
4 Cancer Vaccine and Immuno-Gene Therapy, Mie University Graduate School of Medicine, Tsu, Japan
The gene expression profile of peripheral  T-cell lymphoma ( TCL) has not been investigated. Using oligonucleotide microarrays, we analyzed total RNA from 7 patients with  TCL (4 hepatosplenic, 1 cutaneous, 1 intestinal, and 1 thyroidal) and 27 patients with βTCL (11 peripheral TCL-unspecified, 15 angioimmunoblastic TCL, and 1 hepatosplenic). Unsupervised microarray analyses classified all hepatosplenic  TCLs into a single cluster, whereas other  TCLs were scattered within the βTCL distribution. We identified a T-cell receptor signature gene set, which accurately classified  TCL and βTCL. A classifier based on gene expression under supervised analysis correctly identified  TCL. One case of hepatosplenic βTCL was placed in the  TCL grouping.  TCL signature genes included genes encoding killer cell immunoglobulin-like receptors and killer cell lectin-like receptors. Our results indicate that hepatosplenic  TCL is a distinct form of peripheral TCL and suggest that nonhepatosplenic  TCLs are heterogeneous in gene expression.

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