Expression of Master Regulators of Helper T-Cell Differentiation in Peripheral T-Cell Lymphoma, Not Otherwise Specified, by Immunohistochemical Analysis

Department of Molecular Hematology and Oncology, Kyoto Prefectural University of Medicine, Graduate School of Medical Science, Kawaramachi Hirokoji, Kamigyo-ku, 602-8566, Kyoto, Japan.
American Journal of Clinical Pathology (Impact Factor: 2.51). 02/2010; 133(2):281-90. DOI: 10.1309/AJCP0SBHYVLY5EML
Source: PubMed

ABSTRACT The normal counterparts of peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS) have not been accurately identified. We immunohistochemically analyzed 10 PTCL-NOS cases to examine the expression of the master regulators of T-cell differentiation and of surface antigens, including chemokine receptors. All cases were positive for the master regulator of helper T cells (Th-POK) and the marker of effector T cells (CD45RO). Three cases each were positive for T-Bet and GATA3, which are master regulators of helper T cells (T(H) ) type 1 (T(H)1) and 2 (T(H)2), respectively. Two cases were positive for the surface antigens of central memory (Tcm) (CCR7 and CD62L), and 1 case was positive for follicular helper T-cell (TFH) phenotype (BCL6, CXCL13, and PD-1). The remaining case was negative for all markers of effector T(H) subtypes. These results suggest the postulated normal counterparts of PTCL-NOS identified in 9 of the 10 cases consist of T(H)1, T(H)2, TCM, and TFH.

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