Human mast cell apoptosis is regulated through Bcl-2 and Bcl-XL

Mekori, Yoseph A. and Gilfillan, Alasdair M. and Akin, Cem and Hartmann, Karin and Metcalfe, Dean D.. (2001) Human mast cell apoptosis is regulated through Bcl-2 and Bcl-XL. Journal of Clinical Immunology, 21 (3). pp. 171-174.

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Official URL: https://edoc.unibas.ch/70848/

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It is well established that human mast cell proliferation and maturation are regulated by kit ligand (stem cell factor). Little is known, however, about how these two processes are negatively regulated and thus, how mast cell number is controlled in normal and pathologic conditions. We therefore first hypothesized that SCF-dependent human mast cells would undergo programmed cell death (apoptosis) on removal of SCF as has been shown for growth factor-dependent rodent mast cells. We then examined whether SCF acts as a survival factor through the regulation of the bcl-2 family of apoptosis-regulatory genes. As hypothesized, elimination of SCF from primary peripheral blood-derived human mast cell cultures resulted in a significant apoptotic process. During apoptosis, down-regulation of the two apoptosis-regulatory proteins Bcl-2 and Bcl-XL was observed. Moreover, a deregulated expression of these two proteins was found in two human mast cell lines which are SCF-independent. Thus, SCF functions as a survival factor by repressing apoptosis of human mast cells through Bcl-2 and Bcl-XL. Deregulated expression of these antiapoptotic proteins may contribute to proliferation and accumulation of mast cells in certain forms of systemic mast cell disorders.
Faculties and Departments:03 Faculty of Medicine > Departement Biomedizin > Department of Biomedicine, University Hospital Basel > Allergy and Immunity (Hartmann)
UniBasel Contributors:Hartmann, Karin
Item Type:Article, refereed
Article Subtype:Research Article
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:10 Nov 2020 13:52
Deposited On:10 Nov 2020 13:52

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