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How does the ced-9 gene protect Caenorhabditis elegans cells from death?

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In the nematode Caenorhabditis elegans, the ced-9 gene functions as a protective mechanism against programmed cell death, or apoptosis. Research conducted by H. Robert Horvitz demonstrated that ced-9 prevents cells from dying by interacting with two other specific genes, ced-3 and ced-4, which are responsible for the cell-killing process.1

By inhibiting the activity of these pro-apoptotic genes, ced-9 serves as a critical regulator in the genetic program that determines cell survival and death. This discovery was significant because it revealed that the mechanisms controlling programmed cell death in C. elegans have direct counterparts in humans, providing essential insights into developmental biology and the study of diseases such as cancer.1