Each cell line is studied in growth inhibition experiments using 96-well microtiter plates. As antifols are schedule dependent, preliminary experiments are aimed at defining the longest duration of exposure that would allow for continuous logarithmic phase growth of cells without changing of the culture media while maintaining a linear relationship between SRB optical density and cell number. Twenty-four hours after cell plating, the cell lines are exposed to the antifol for 120 h (three replicates per experiment). To ensure that a complete sigmoidal survival-concentration curve could be observed, the following drug concentrations are studied: Methotrexate (0.002-5 μM), AMT (0.0001-1 μM), PXD (0.0003-10 μM), TLX (0.0002-0.5 μM). Experiments are repeated at least twice^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Mice^[2]
The combination of bioactive phytochemicals is administered one week prior to the Methotrexate exposure. Treatment group I: mice are given a combination of green tea polyphenols and eleutherosides from Siberian ginseng (0.2 mL/10 g, i.g. once daily) for 15 days, and a single dose of Methotrexate (2 mg/kg, i.p. once daily) is added on the 8th day. Treatment group II: mice are given a combination of grape seed proanthocyanidins and eleutherosides from Siberian ginseng for 15 days, and Methotrexate is administered on the 8th day in a similar manner. Model group: animals received distilled water instead of bioactive phytochemicals combinations for 15 days and the same Methotrexate protocol applied to this group on the 8th day. Control group: mice are given distilled water through 15 days and physiological saline instead of Methotrexate is administered on the 8th day in a similar manner. Twelve hours after the final doses, the animals are euthanized by cervical dislocation.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

• [1]. Norris RE, et al. Clinical potency of methotrexate, aminopterin, talotrexin and pemetrexed in childhood leukemias. Cancer Chemother Pharmacol. 2010 May;65(6):1125-30.

  [2]. Gu S, et al. Screening of cytoprotectors against methotrexate-induced cytogenotoxicity from bioactive phytochemicals. PeerJ. 2016 May 11;4:e1983.

454.44

C₂₀H₂₂N₈O₅

59-05-2

NC1=NC(N)=C2C(N=CC(CN(C)C3=CC=C(C(N[C@@H](CCC(O)=O)C(O)=O)=O)C=C3)=N2)=N1

4°C, protect from light

Room temperature in continental US; may vary elsewhere