mitogen (n.), mitogenic (adj.)

https://doi.org/10.1351/goldbook.13461
Substance that induces lymphocyte transformation or, more generally, mitosis and cell proliferation.
Note: Mitogens most commonly employed in immunotoxicology assays include the T-cell mitogens concanavalin A (ConA) and phytohemagglutinin (PHA). Mitogens routinely used for assessing B-cell proliferation include pokeweed mitogen (PWM), which can also act on T cells, and Escherichia coil lipopolysaccharide (LPS).
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1213 [Terms] [Paper]