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Definition of «Apoptosis»


Apoptosis: A form of cell death in which a programmed sequence of events leads to the elimination of cells without releasing harmful substances into the surrounding area. Apoptosis plays a crucial role in developing and maintaining health by eliminating old cells, unnecessary cells, and unhealthy cells. The human body replaces perhaps a million cells a second. Too little or too much apoptosis plays a role in a great many diseases. When programmed cell death does not work right, cells that should be eliminated may hang around and become immortal. For example, in cancer and leukemia. When apoptosis works overly well, it kills too many cells and inflicts grave tissue damage. This is the case in strokes and neurodegenerative disorders such as Alzheimer, Huntington and Parkinson diseases. Apoptosis is also called programmed cell death or cell suicide. Strictly speaking, the term apoptosis refers only to the structural changes cells go through, and programmed cell death refers to the complete underlying process, but the terms are often used interchangeably.

For More Information «Apoptosis»

  • apoptosis: Definition from Answers.com

    Library > Literature & Language > Dictionary ( ăp ' əp-tō ' sĭs, ăp ' ə-tō ' - ) n. Disintegration of cells into membrane-bound particles that are then ...

  • Apoptosis

    Apoptosis For every cell, there is a time to live and a time to die. There are two ways in which cells die: They are killed by injurious agents.

  • Apoptosis

    Learn about apoptosis and the apoptotic cascade. Find protocols and methods for programmed cell death. News and a forum on apoptosis.

  • Apoptosis | Define Apoptosis at Dictionary.com

    noun a normal, genetically regulated process leading to the death of cells and triggered by the presence or absence of certain stimuli, as DNA damage. Cancer ...

  • Apoptosis - www.promega.com

    This chapter of the Protocols and Applications Guide explains the molecular mechanisms of apoptosis, how to confirm apoptosis, and the use of multiplexed assays using a ...

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