Biological Activity

Vincristine (leurocristine, Oncovin), sometimes abbreviated "VCR", is a kind of microtubule function inhibitor. Vincristine sulfate is the salt of an alkaloid from the flowering periwinkle plant (also known as Vinca rosea Linn). Vincristine sulfate induces apoptosis in human lymphoma cells. Vincristine binds to tubulin dimers, inhibiting assembly of microtubule structures. The IC50 and IC90 of vincristine for the 4 vaccine-associated feline sarcoma (VAFS) cell lines were between 0.005 to 0.039 µg/ml and 0.045 to 1.027 µg/ml, respectively.

Chemical Information

Molecular Weight	923.04
Formula	C46H56N4O10.H2SO4
CAS Number	2068-78-2
Solubility (25°C)	DMSO 80 mg/mL Water 60 mg/mL
Storage	-20°C, protect from light, sealed

Conversion of different model animals based on BSA (PMID: 27057123)

Species	Mouse	Rat	Rabbit	Guinea pig	Hamster	Dog
Weight (kg)	0.02	0.15	1.8	0.4	0.08	10
Body Surface Area (m2)	0.007	0.025	0.15	0.05	0.02	0.5
Km factor	3	6	12	8	5	20

Animal A (mg/kg) = Animal B (mg/kg) multiplied by	Animal B Km
	Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the K_m factor for a mouse and then divide by the K_m factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.

References

[1] Jordan MA, et al. Cancer Res. Comparison of the effects of vinblastine, vincristine, vindesine, and vinepidine on microtubule dynamics and cell proliferation in vitro.