Constitutive overexpression of a novel 21 kDa protein by Hodgkin lymphoma and aggressive non-Hodgkin lymphomas

• Published in: Molecular cancer Vol. 7; no. 1; p. 12
• Main Authors: Zhou, Minglong, Fadlelmola, Faisal M, Cohn, Jason B, Skinnider, Brian, Gascoyne, Randy D, Banerjee, Diponkar
• Format: Journal Article
• Language: English
• Published: England BioMed Central Ltd 24.01.2008; BioMed Central; BMC
• Subjects: Animals; Antibodies, Monoclonal - immunology; Antibody Specificity; Antigens, Neoplasm - immunology; Care and treatment; Cell Line, Tumor - immunology; Cytoplasm - chemistry; Cytoplasm - immunology; Diagnosis; Epitopes - immunology; Gene Expression Regulation, Neoplastic; Health aspects; Hodgkin Disease - metabolism; Hodgkin Disease - pathology; Hodgkin's disease; Humans; Ki-1 Antigen - analysis; Lymphocyte Activation - drug effects; Lymphoma, Non-Hodgkin - metabolism; Membrane Proteins - biosynthesis; Membrane Proteins - immunology; Mice; Mice, Inbred BALB C; Molecular Weight; Neoplasm Proteins - biosynthesis; Neoplasm Proteins - immunology; Non-Hodgkin's lymphomas; Physiological aspects; Phytohemagglutinins - pharmacology; Proteins; Reed-Sternberg Cells - immunology; Reed-Sternberg Cells - metabolism; T-Lymphocytes - drug effects; T-Lymphocytes - metabolism; Canada
• ISSN: 1476-4598; 1476-4598
• DOI: 10.1186/1476-4598-7-12

CD30, a 120 kDa surface phosphorylated protein is a member of tumour necrosis/nerve growth factor receptor (TNF/NGFR) family and constitutively expressed by Hodgkin and Reed-Sternberg (HRS) cells of Hodgkin lymphoma (HL) and the neoplastic cells of Anaplastic Large Cell Lymphoma (ALCL). A disease-specific protein marker is yet to be identified in Hodgkin lymphoma cells. In order to define HL-specific biomarkers, novel murine monoclonal antibodies were developed in our laboratory. Murine monoclonal antibodies (mabs) were raised against the B3 sub clone of HL-derived cell line KM-H2. Two of these mabs (clone R23.1 mab and clone R24.1 mab) are IgG1 class antibodies that recognize a 21 kDa protein present at the cell membrane and in the cytoplasm in HL-derived cell lines. Clone R24.1 mab recognizes a formalin-resistant epitope and labels HRS cells in tissue samples from patients with HL of the classical type, ALCL, and subsets of T and B cell aggressive Non-Hodgkin Lymphomas (NHL). The antigen recognized by the clone R23.1 mab and clone R24.1 mab does not share epitopes with CD30 cluster regions A, B, or C, and, unlike CD30, is not expressed by phytohemagglutinin (PHA) activated T cells. The 21 kDa protein detected by clone R23.1 and clone R24.1 mabs is a novel membrane-associated protein that may be a potential marker for the diagnosis and targeted therapy of HL and aggressive T and B cell NHL.