Vincristine Sulfate, a dimeric Vinca alkaloid, has been shown to bind to Tubulin via a protein self association reaction. This compound acts as a Tubuiln inhibitor by binding to sites at the ends of microtubules, which regulate the inhibition of Tubulin dimer addition to microtubule ends. Experiments have reported Vincristine Sulfate to demonstrate a capacity to suppress growth of proliferating cells through marked apoptosis and cell cycle arrest at G2/M. The cell death caused by this agent seems to result in a sustained accumulation of endogenous ceramide levels. Ceramide, has been proposed as a lipid second messenger with specific antiproliferative mediating responses. Vincristine Sulfate is an inhibitor of MAO. Vincristine Sulfate is also a substrate of PGP and CYP3A4.
Test | Specification | Results |
---|---|---|
Appearance | White to off-white solid | White solid |
Microanalysis | Elemental analysis within 0.4 of expected result for each element tested | Complies |
Identification (1H-NMR) | Consistent with structure and shows < 1% of any other impurity | Complies |
Identification (Mass Spectrometry) | Electrospray positive shows mass ion corresponding to [M-H2SO4+H]+ and [M-H2SO4+2H]2+ | Mass ions: 825.5 and 413.5 |
Purity (HPLC) | > 98% by RP analysis | Complies |
TLC | Single spot | Rf = 0.50 |
Solubility | Soluble in water to 100 mM | Complies |
NMR Conditions: 300 MHz in D2OTLC Conditions: PAW: BuOH = 2: 3; Visualized by UV and Ninhydrin
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