5-Methoxypsoralen

Cell experiment:

The human colon adenocarcinoma cell line (COLO 205, from a 70-year-old male Caucasian) sre placed into 75-cm2 tissue culture flasks and grown in RPMI1640 medium, supplemented with 10% fetal bovine serum, containing penicillin and streptomycin (100 μg/mL) and 1 mM glutamine, at 37°C in a humidified atmosphere of 5% CO2 and 95% O2. The human stomach adenocarcinoma cell line are placed into 75-cm2 tissue culture flasks and grown in RPMI 1640 medium, supplemented with 10% fetal bovine serum, containing penicillin and streptomycin (100 μg/mL) and 1 mM glutamine, at 37°C in a humidified atmosphere of 5% CO2 and 95% O2. SC-M1 and COLO 205 cells are treated with different concentrations of Bergapten (0.05, 0.5, 5, 10, 25 and 50 mM) and incubated for 72 h for the dose-effect study of Bergapten on NAT activity. To determine the time-course effect of 0.5 mM Bergapten on NAT activity, the cells are incubated at 37AC and harvested at 12, 24, 48 and 72 h, respectively. Bergapten is dissolved in DMSO and the final concentration of vehicle is

Animal experiment:

Rats[1] Seventy-two male Sprague-Dawley (SD) rats, weighing approximately 200 g are used. A total of 72 rats are subjected to 3 different regimens, each regimen divided into 4 groups with 6 rats in each group. Gastric intubation is used for delivery of the test compounds into each animal. The first regimen received 1 mL Bergapten (dissolved in DMSO) at a dose of 0.5 mmol per Kg of body weight. Regimen 2, the control regimen, received only 1 mL solvent (DMSO), without any Bergapten. Regimen 3, the contrast regimen, received nothing at that time. Twenty-four h later, all of the rats from the 3 regimens received 1mL AF (dissolved in DMSO) at a dose of 0.3 mmol per Kg of body weight. The groups are divided by different collecting time: 12, 24, 48 and 72 h after AF administration, and then the animals are transferred to individual metabolism cages. The stomachs and the colons of the rats from each regimen are collected and are immediately extracted with ethyl acetate/methanol (95:5). The solvent is evaporated and the residue redissolved in methanol and assayed for AF and AAF by HPLC.

References:

[1]. Lee YM, et al. Effects of 5-methoxypsoralen (5-MOP) on arylamine N-acetyltransferase activity in the stomach and colon of rats and human stomach and colon tumor cell lines. In Vivo. 2005 Nov-Dec;19(6):1061-9.
[2]. Li XJ, et al. Bergapten exerts inhibitory effects on diabetes-related osteoporosis via the regulation of the PI3K/AKT, JNK/MAPK and NF-κB signaling pathways in osteoprotegerin knockout mice. Int J Mol Med. 2016 Dec;38(6):1661-1672.