2014
DOI: 10.1016/j.bcp.2014.05.017
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Collateral sensitivity of resistant MRP1-overexpressing cells to flavonoids and derivatives through GSH efflux

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Cited by 43 publications
(34 citation statements)
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“…As a possible explanation for the lower antioxidant capacity of these cells, lower glutathione (GSH) levels and decreased activities of glutathione-S-transferase (GST) and glutathione reductase (GR) were described. Lorendeau et al [32] have recently published a comprehensive study on "classical" (i.e., not proto-) flavonoids' ability to selectively kill ABCC1 (MRP1)-transfected cancer cells through GSH depletion; potential use of protoflavones against such MDR cells might also be hypothesized. In addition to the role of oxidative stress in CS connected to the above-mentioned efflux transporters, Hall et al [1] demonstrated that, in P-gp overexpressing MDR cells obtained via adaptation, CS activity of the thiol-containing prescription drug tiopronin was mediated by ROS generation and the inhibition of glutathione peroxidase (GPx).…”
Section: Discussionmentioning
confidence: 99%
“…As a possible explanation for the lower antioxidant capacity of these cells, lower glutathione (GSH) levels and decreased activities of glutathione-S-transferase (GST) and glutathione reductase (GR) were described. Lorendeau et al [32] have recently published a comprehensive study on "classical" (i.e., not proto-) flavonoids' ability to selectively kill ABCC1 (MRP1)-transfected cancer cells through GSH depletion; potential use of protoflavones against such MDR cells might also be hypothesized. In addition to the role of oxidative stress in CS connected to the above-mentioned efflux transporters, Hall et al [1] demonstrated that, in P-gp overexpressing MDR cells obtained via adaptation, CS activity of the thiol-containing prescription drug tiopronin was mediated by ROS generation and the inhibition of glutathione peroxidase (GPx).…”
Section: Discussionmentioning
confidence: 99%
“…Another approach was supplementation with a precursor of GSH synthesis. This was demonstrated for l ‐cysteine (1 mM), as well as its more lipophilic prodrug NAC (1‐10 mM) . For its part, cysteine uptake can be improved by the use of cadmium chloride or sodium arsenite as shown by Bannai et al and Sagara et al, which mirrored in enhanced intracellular GSH values.…”
Section: Acceleration Of Mrp1‐mediated Transportmentioning
confidence: 92%
“…GST may form a dynamic complex with flavonoids and vesicles for flavonoid transport [2,4,7,8,24,25]. One hypothesis is that the GST binding of GSH and flavonoids may provide ABCCs with both substrates for their co-transport [5,19] (Figures 1 and 2). …”
Section: Subcellular Localization Of Gsts For Flavonoid Transportmentioning
confidence: 97%
“…Thus, how ABC transporters and GSTs are involved in flavonoid production has been a long-standing question. In mammalian cells, MRP transporters are involved in multidrug resistance of cancer cells by co-transporting drugs out of cells or into organelles with GSH [19]. Only recently was it shown that free GSH is strictly required for transport of an anthocyanin, malvidin 3-O-glucoside (M3G), into yeast vacuoles by grapevine (Vitis vinifera) ABCC1 [5].…”
mentioning
confidence: 99%