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Published on: January 7, 2019
T cell survival and function requires the c-Abl tyrosine kinase
Isabelle Silberman1, Ronit Vogt Sionov, Valentina Zuckerman
1Lautenberg Center for General and Tumor Immunology, Hadassah Medical School, The Hebrew University, Jerusalem, Israel.
Cell Cycle (Georgetown, Tex.)
|December 23, 2008
Summary
The Abl kinase is crucial for T cell survival and function. Abl deficiency in T cells impairs immune responses, leading to reduced tumor rejection and anti-tumor antibody generation.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- The Abl tyrosine kinase regulates critical cellular processes like proliferation, survival, and motility.
- Mice lacking Abl display growth retardation, osteoporosis, and immune deficiencies.
Purpose of the Study:
- To investigate the specific role of Abl in the function and survival of adult T cells.
- To understand Abl's contribution to T cell-mediated immune responses.
Main Methods:
- Generated mice with Abl specifically ablated in T cells (Abl-T(-/-)) using floxed abl alleles and an Lck-Cre transgene.
- Assessed T cell numbers, thymic cellularity, thymocyte apoptosis, and in vitro mitogenic responses.
- Evaluated anti-tumor immunity, including tumor rejection, T cell-mediated tumor cell killing, and antibody production.
Main Results:
- Abl-T(-/-) mice exhibited thymic atrophy and reduced peripheral T cell counts due to increased thymocyte apoptosis.
- Abl-deficient T cells showed diminished responses to mitogenic stimulation in vitro.
- Consequently, Abl-T(-/-) mice displayed impaired syngeneic tumor rejection, reduced T cell-mediated tumor cell killing, and decreased anti-tumor antibody generation.
Conclusions:
- Abl plays a cell-autonomous role in maintaining T cell function and survival.
- Abl is essential for effective T cell-mediated immune responses against tumors.
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