Preferential uptake of xanthophylls by human retinal pigment epithelial cells is mediated by scavenger receptor B1
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چکیده
منابع مشابه
Uptake by Retinal Pigment Epithelial Cells
Uptake of Ca was studied in isolated frog retinal pigment epithelial cells. Ca accumulation was found to be a saturable, temperature-dependent event. Kinetic analysis of this accumulation revealed two transport systems with apparent km of 2.0 and 0.3 mM. We found the presence of a Na-Ca exchanger mechanism that releases Ca under depolarized conditions. Light induced an increase of Ca uptake due...
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The xanthophylls, lutein and zeaxanthin, are dietary carotenoids that selectively accumulate in the macula of the eye providing protection against age-related macular degeneration. To reach the macula, carotenoids cross the retinal pigment epithelium (RPE). Xanthophylls and β-carotene mostly associate with HDL and LDL, respectively. HDL binds to cells via a scavenger receptor class B1 (SR-B1)-d...
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The purpose of this study was to determine the high-density lipoprotein (HDL)-associated alpha-tocopherol (alpha-tocopherol-HDL) transport and clarify the contribution of scavenger receptor class B, type I (SR-BI) to the uptake in the human retinal pigment epithelial cell line (ARPE-19 cells). [(3)H]alpha-Tocopherol-HDL uptake into ARPE-19 cells seeded onto a transwell from both the apical (api...
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Although a primary role of the retinal pigment epithelium (RPE) is the phagocytosis of aged outer segment membranes, the RPE may also phagocytize particulates via several specific receptors that are characteristically present on mononuclear phagocytes of bone marrow origin. In recent immunophenotypic studies, CD68 monoclonal antibodies (mAb) have been shown to react selectively with a specific ...
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ژورنال
عنوان ژورنال: The FASEB Journal
سال: 2008
ISSN: 0892-6638,1530-6860
DOI: 10.1096/fasebj.22.1_supplement.313.5