mitogen
Noun: A mitogen is a chemical substance, typically a protein or peptide, that stimulates a cell to begin cell division (mitosis). It acts as a signal, triggering cells to exit their resting state and enter the cell cycle to proliferate.
Mitogens are primarily discussed in the contexts of biology, biochemistry, and immunology. They are used to study cell growth, immune responses, and cancer research. - As a subject or object: The word "mitogen" is used to name the agent itself. - With modifiers: Often specified by type (e.g., plant mitogen, potent mitogen) or source (e.g., lectin mitogen).
- In a general scientific context:
- Phytohemagglutinin is a common mitogen used in laboratories to stimulate lymphocyte proliferation.
- The researchers added a mitogen to the culture to induce cell division.
- Describing properties:
- This compound has strong mitogen activity.
- The mitogen signal was sufficient to drive the cells into the S phase.
- "Mitogenic" (adjective): Describes something having the properties of a mitogen; stimulating mitosis.
- The serum exhibited mitogenic effects on the fibroblast cells.
- "Mitogenicity" (noun): The capacity or potency of a substance to act as a mitogen.
- The mitogenicity of the extract was confirmed by the assay.
- Mitogenic (adj.): Having the ability to trigger mitosis.
- Mitogenicity (n.): The quality of being mitogenic.
- Lectin: A type of protein, many of which are mitogens (e.g., concanavalin A).
- Growth factor: A broader category of substances that stimulate cell growth and proliferation; many growth factors are mitogens.
- Cell division stimulant
- Proliferative agent
- Mitotic stimulant
The term is highly specific to cell biology. It does not refer to the process of mitosis itself, but exclusively to an external agent that initiates that process. Its meaning is distinct from related terms like "growth factor," which may promote cell growth without necessarily triggering division, or "cytokine," which is a broader signaling molecule.
- an agent that triggers mitosis