Cytostasis

Not to be confused with Cytotoxicity.

Cytostasis (cyto – cell; stasis – stoppage) refers to the inhibition of cell growth and proliferation. A cytostatic agent is a cellular component or drug that prevents cells from dividing, thereby suppressing proliferation; in some contexts, prolonged cytostasis may lead to cell death.

Cytostasis is essential for the development and maintenance of structured multicellular organisms. Without regulation of cell growth and division, organized tissues and organs would not be possible. Cytostatic drugs are widely used in the chemotherapy of cancer, as well as in the treatment of certain skin diseases and infections, although they may also affect normal, healthy cells and tissues. Certain active hygienic products also contain cytostatic substances.

In practice, cytostatic and cytotoxic mechanisms often occur together, as many agents display both growth-inhibitory and cell-killing effects depending on concentration, exposure time, and cell type. Unlike cytotoxicity, which causes cell death, cytostasis suppresses proliferation without necessarily killing cells.

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