Transcrocetin (trans-Crocetin) (Synonyms: NSC 407300)

Cell experiment:

Cytotoxicity of test compounds is determined by MTT assay using Caco-2 cells in 96 well plates at a density of 20.000 cells per well in 200 µl FBS-free medium, grown for 96 h and followed by 24 h contact time with the test compounds (100 µL of serum-free media containing SE 0.5, 1, and 2 mg/mL; trans-crocin-1 250, 500, and 1000 µM; Transcrocetin 10, 40, 80, and 160 µM) and incubation at 37°C/5% CO2. The incubation solutions are aspirated, each well is washed twice with 150 µL of PBS and 50 µL of MTT solution are added (2.5 mg/mL in PBS). Supernatants are discarded and the formed formazan is dissolved in 50 µL of DMSO. The absorption of the resulting solution is determined at λ=492 nm against reference wavelength λ=690 nm[1].

References:

[1]. Lautenschläger M, et al. Intestinal formation of trans-Crocetin from saffron extract (Crocus sativus L.) and in vitro permeation through intestinal and blood brain barrier. Phytomedicine. 2015 Jan 15;22(1):36-44.
[2]. José Bagur M, et al. Saffron: An Old Medicinal Plant and a Potential Novel Functional Food. Molecules. 2017 Dec 23;23(1). pii: E30.