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In order to solve a jigsaw puzzle, one must first have the complete picture to logically connect the pieces. However, in cancer biology, we are still gaining an understanding of all the signaling pathways that promote tumorigenesis and how these pathways can be pharmacologically manipulated by conventional and targeted therapies. Despite not having complete knowledge of the mechanisms that cause cancer,...
Mitochondria control whether a cell lives or dies. The role mitochondria play in deciding the fate of a cell was first identified in the mid-1990s, because mitochondria-enriched fractions were found to be necessary for activation of death proteases, the caspases, in a cell-free model of apoptotic cell death. Mitochondrial involvement in apoptosis was subsequently shown to be regulated by Bcl-2, a...
The Bcl-2 family includes a growing number of proteins that play an essential role in regulating apoptosis or programmed cell death. Members of this family display diverse biological functions and can either inhibit or promote cell death signals. Abnormal gene expression of some Bcl-2 family members such as Bcl-2 that inhibits apoptosis is found in a wide variety of human cancers and contributes to...
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