Related Experiment Video
Updated: Jul 12, 2026

Tumor Engraftment in a Xenograft Mouse Model of Human Mantle Cell Lymphoma
Published on: March 30, 2018
The role of TCL1 in human T-cell leukemia
Y Pekarsky1, C Hallas, C M Croce
1Kimmel Cancer Center, Thomas Jefferson University, 233 South 10th Street Philadelphia, Pennsylvania, PA 19107, USA. Carlo.Croce@mail.tju.edu
Abstract:
The TCL1 locus on human chromosome 14q32.1 is activated in T-cell leukemias by translocations and inversions that juxtapose it to regulatory elements of T-cell receptor genes. We isolated and characterized four genes at this locus, TCL1 and TCL1b (T-cell leukemia/lymphoma 1 and 1b), and TNG1 and TNG2 (TCL neighboring genes 1 and 2) all of which are overexpressed following rearrangements involving 14q32.1. TCL1 and TCL1b show 60% similarity and are represented in the mouse by a cluster of six homologous genes. In humans TCL1 and TCL1b show similar expression patterns: They are expressed mainly in CD4-/CD8- immature T-cells, pre B-cells and virgin B-cells. Expression decreases significantly at more mature stages of B-cell development. Activation of TCL1 and/or TCL1b in mature T-cells causes T-cell leukemia in humans. The oncogenic nature of TCL1 was confirmed by the analysis of a transgenic mouse model. Functional analysis of Tcl1 revealed its involvement in a PI3-kinase dependent Akt (PKB) pro-survival pathway through its interaction with the Akt kinase which increases Akt's enzymatic activity and promotes translocation of Akt to the nucleus.
Related Concept Videos
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Cytotoxic T Cells-mediated Immune Response
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...

