2017
DOI: 10.1007/s11095-017-2241-0
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Role of the OATP Transporter Family and a Benzbromarone-SensitiveEfflux Transporter in the Hepatocellular Disposition of Vincristine

Abstract: Our findings show the involvement of OATP transporters in the disposition of vincristine in rat and human hepatocytes. However, in both species, hepatic uptake is overshadowed by a benzbromarone-sensitive efflux mechanism, possibly MRP3.

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Cited by 10 publications
(11 citation statements)
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“…Thus, it seems that biliary efflux via P‐gp may not be the critical factor in defining vincristine hepatic clearance. Studies utilizing suspended cryopreserved human hepatocytes also indicate that the rate‐limiting factor is not efflux via P‐gp, which is consistent with the conclusion reached based on the sensitivity analyses but suggests a possible role of BL organic anion transporter proteins in rate‐limiting uptake into hepatocytes.…”
Section: Discussionsupporting
confidence: 83%
See 1 more Smart Citation
“…Thus, it seems that biliary efflux via P‐gp may not be the critical factor in defining vincristine hepatic clearance. Studies utilizing suspended cryopreserved human hepatocytes also indicate that the rate‐limiting factor is not efflux via P‐gp, which is consistent with the conclusion reached based on the sensitivity analyses but suggests a possible role of BL organic anion transporter proteins in rate‐limiting uptake into hepatocytes.…”
Section: Discussionsupporting
confidence: 83%
“…Although vincristine is well known as a substrate of P‐gp, kinetic parameters of its efflux have not previously been reported. Kinetic studies of P‐gp efflux are often performed in vitro using inside‐out membrane vesicle systems overexpressing MDR1; however, it is difficult to achieve adequate intravesicular concentrations of lipophilic compounds such as vincristine for evaluation . The permeability (P app ) of vincristine (10 μM) across MDCKII‐MDR1 monolayers is sevenfold greater in the BL to AP direction (157 nm/s) than in the AP to BL direction (22 nm/s), consistent with AP efflux.…”
Section: Resultsmentioning
confidence: 97%
“…49 MRP2 can also transport vincristine in cells but the significance of this transport in vivo is not known. 50 Similarly, vincristine has been shown to be transported by OATP1B1 and OATP1B3 in vitro, 51,52 although their contribution to vincristine disposition or neurotoxicity are not characterized.…”
Section: Platinsmentioning
confidence: 99%
“…Among these drugs, only vincristine and vinorelbine have been assayed in the treatment of patients with HB [117]. OATP transporters have been involved in the uptake of vincristine [118] and the expression of both SLCO1B1 and SLCO1B3 have been found lower in HB than in adjacent non-tumor tissue [10]. SLC22A3 expression has been associated with the sensitivity to vincristine in kidney carcinoma cell lines [119], but no changes in the expression of this gene in HB have been found [10].…”
Section: Mechanisms Of Hb Resistance To Vinca Alkaloidsmentioning
confidence: 99%