The immunologic mechanisms involved in virus-induced hepatitis were examined by measuring the cytotoxic capabilities and the morphologic and antigenic phenotypes of leukocytes isolated from livers of virus-infected mice. Large granular lymphocytes (LGL) of both natural killer (NK) cell and cytotoxic T lymphocyte (CTL) phenotypes were found to accumulate in livers of mice infected with either th...

Using cloned murine large granular lymphocyte (LGL) lines, the expression and the rearrangement of the alpha, beta, and gamma chain genes of the T cell receptor (TCR) were analyzed. Morphological, phenotypical, as well as functional studies indicated that the LGL lines were identical to normal, endogenous NK cells. Northern blot hybridization analysis indicated that the full-length transcripts ...

Peripheral blood lymphoid cell expansions with an unusual CD3+, CD4+, CD8dim+/-, CD11b+, CD57+ immunophenotype have recently been reported. They frequently have the morphology of large granular lymphocytes (LGL) and can be either monoclonal or polyclonal. Their significance is still unclear and no association with hematological neoplasms has been described. We report the case of a patient with ...

Large granular lymphocytic (LGL) leukemia and myelodysplastic syndromes (MDSs) both typically present with unexplained cytopenias, yet these diseases are pathobiologically distinct and associated with substantial differences in prognosis and therapy. LGL leukemias, including both T-cell LGL leukemia and chronic lymphoproliferative disorder of natural killer (NK) cells, are clonal lymphoid disor...

T-cell large granular lymphocyte (LGL) leukemia is characterized by clonal expansion of CD3(+)CD8(+) cells. Leukemic LGLs correspond to terminally differentiated effector-memory cytotoxic T lymphocytes (CTLs) that escape Fas-mediated activation-induced cell death (AICD) in vivo. The gene expression signature of peripheral blood mononuclear cells from 30 LGL leukemia patients showed profound dys...

Large granular lymphocytes (LGL) from human blood maintained in culture for 2 to 6 weeks with IL-2 were found positive in the K562 cell killing assay. The cytoplasmic granules of the LGL were isolated, lysed and the soluble proteins were passed over a Sepharose-anti-C9 column. The retained protein was eluted with NaCl and found to consist by SDS polyacrylamide gel electrophoresis of essentially...

Post-transplantation lymphoproliferative disorder (PTLD) is a significant complication of solid organ transplantation. Most PTLD is of the B-cell subtype, although T-cell subtype PTLD uncommonly occurs. T-cell PTLDs are usually aggressive neoplasms and shorten patient and allograft survivals significantly. We present a single-center case series of 4 patients who developed T-cell large granular ...

Inclusion body myositis (IBM) is the most prevalent acquired myopathy in adults beyond the age of 50. The disease is relentlessly progressive and largely resistant to immunosuppressive therapy (reviewed by Hohlfeld, 2011). In IBM, and less frequently also in polymyositis, non-necrotic muscle fibres are focally surrounded and invaded by CD8+ cytotoxic T cells (CTL) (Fig. 1) (Engel and Arahata, 1...

Do cy-togenetic abnormalities precede morphologic abnormalities in a developing malignant condition? Eur J Haematol 2007;78: 152-6. 4. Wong KF, Kwong YL. Isochromosome 8q is a marker of secondary acute myeloid leukemia. Deletion of 6q16-q21 in human lymphoid malignancies: a mapping and deletion analysis. et al. 6q deletion detected by fluorescence in situ hybridization using bacterial artificia...

Clonal diseases of large granular lymphocytes (LGLs) represent a spectrum of clinically rare lymphoproliferative malignancies arising from either mature T-cell (CD3(+)) or natural killer (NK)-cell (CD3(-)) lineages. The clinical behavior of these disorders ranges from indolent to very aggressive. Patients with symptomatic indolent T-cell or NK-cell LGL leukemia are usually treated with immunosu...