期刊
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
卷 39, 期 4, 页码 241-247出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ejps.2009.12.006
关键词
Corneal epithelium; Monocarboxylate transporter; MCT; SLC16; Ocular absorption; Ophthalmic drugs
资金
- Academy of Finland
- Finnish Cultural Foundation
- South Savo Regional Fund
Monocarboxylate transporters (MCTs) are transmembrane proteins capable of transferring lactate and other endogenous and exogenous monocarboxylates across the cell membrane. The aim of the present study was to assess the expression and transporter role of human MCT1, MCT3 and MCT4 in the corneal epithelium, corneal epithelial cell lines (primary HCEpiC and immortalized HCE cells) and isolated rabbit corneas. MCT1 and MCT4 were expressed in the human corneal epithelium and the cell lines at mRNA and protein levels. Cellular uptake studies showed saturable and pH-dependent L-lactic acid transport, which was inhibited by various monocarboxylates like diclofenac and flurbiprofen. The permeability of benzoic acid across the rabbit cornea was higher in absorptive direction and this directionality was diminished in the presence of monocarboxylate drug valproic acid. Monocarboxylate transport was functional in the human corneal epithelial cells and rabbit cornea and it may play a role in the ocular drug absorption. (C) 2009 Elsevier B.V. All rights reserved.
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