Abstract
Twelve cases of T gamma LPD (lymphoproliferative disorders of Fc gamma receptor-bearing T cells) involving an expansion of large granular lymphocyte/natural killer (LGL/NK) cells were investigated for the expression of LGL/NK-associated markers and for T beta gene rearrangement. All the cases selected were classified as T gamma LPD on the basis of morphology, function, and phenotype of the circulating cells. 10 to 12 cases displayed clonal rearrangements of the T beta locus and expression of the T3 antigen, whereas the 2 remaining cases displayed the germline configuration of the T beta gene and no expression of the T3 antigen. T8, Mol, B73.1, and N901 antigens were variably expressed among both T beta+T3+ and T beta-T3- T gamma LPD cases. We suggest that individual T gamma LPD cases represent the clonal expansion of cells frozen at different stages of differentiation/activation within an individual hematopoietic LGL/NK lineage.
MeSH Terms
Antigens, Differentiation, T-Lymphocyte
Antigens, Surface/genetics
Cytotoxicity, Immunologic
Humans
Killer Cells, Natural/immunology,metabolism
Leukemia/genetics,immunology
Lymphocytosis/genetics,immunology
Lymphoproliferative Disorders/classification,genetics,immunology
Nucleic Acid Hybridization
Phenotype
Receptors, Antigen, T-Cell/genetics
T-Lymphocytes/classification,immunology,metabolism
Chemicals
Antigens, Differentiation, T-Lymphocyte
Antigens, Surface
Receptors, Antigen, T-Cell
Authors & Affiliations
9 authors, click to expand affiliations / ORCID
Rambaldi A
Pelicci P G
Allavena P
Knowles D M
Rossini S
Bassan R
Barbui T
Dalla-Favera R
Mantovani A
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