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Blood, Vol. 93 No. 9 (May 1), 1999: pp. 3106-3115

Bcl-Xl- and Bax-&b.alpha;-Mediated Regulation of Apoptosis of Human Neutrophils Via Caspase-3

Pamela Weinmann, Peter Gaehtgens, and Barbara Walzog

From the Department of Physiology, Freie Universität, Berlin, Germany.

In this study, a mechanism is reported which determines the lifetime of polymorphonuclear neutrophils (PMN). In human PMN freshly isolated from the circulation, expression of bcl-Xl, bax-alpha , and bak, members of the bcl-2 family of apoptosis-associated genes, was found using the reverse transcription-polymerase chain reaction technique. In contrast, no expression of bcl-2 was seen in PMN, whereas the myeloid cell line HL-60 was positive for bcl-2 mRNA. Two gene products, Bcl-Xl and Bax-alpha , which are known to function as the regulatory machinery of programmed cell death (apoptosis), were detected at the protein level in PMN. Moreover, differential expression of these proteins was found upon induction or prevention of apoptosis by cytokines: Whereas induction of apoptosis by tumor necrosis factor-alpha was associated with a reduction of expression of the anti-apoptotic Bcl-Xl protein, prevention of apoptosis by granulocyte-macrophage colony-stimulating factor led to a downregulation of expression of the death-promoting Bax-alpha protein. This shift of balance of anti- and pro-apoptotic proteins was found to control caspase-3 activity which, in turn, downregulated Bcl-Xl expression in PMN undergoing apoptosis. Thus, cytokines can affect the ratio of Bax-alpha /Bcl-Xl expression in human PMN and modulate the subsequent activity of caspase-3, which functions as executer of the programmed cell death and may promote apoptosis by a positive feed-forward mechanism that downregulates Bcl-Xl.


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[Abstract] [Full Text] [PDF]


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[Abstract] [Full Text] [PDF]


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[Abstract] [Full Text] [PDF]


Home page
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[Abstract] [Full Text] [PDF]


Home page
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[Abstract] [Full Text] [PDF]


Home page
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[Abstract] [Full Text] [PDF]


Home page
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[Abstract] [Full Text] [PDF]


Home page
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[Abstract] [Full Text]


Home page
J. Biol. Chem.Home page
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[Abstract] [Full Text] [PDF]


Home page
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[Abstract] [Full Text] [PDF]


Home page
FASEB J.Home page
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[Abstract] [Full Text]


Home page
J. Biol. Chem.Home page
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