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Effects of Fucoidans from Five Different Brown Algae on Oxidative Stress and VEGF Interference in Ocular Cells

1
Department of Ophthalmology, University Medical Center, University of Kiel, Arnold-Heller-Str. 3, Haus 25, 24105 Kiel, Germany
2
Department of Pharmaceutical Biology, Pharmaceutical Institute, University of Kiel, Gutenbergstraße 76, 24118 Kiel, Germany
*
Author to whom correspondence should be addressed.
Mar. Drugs 2019, 17(5), 258; https://doi.org/10.3390/md17050258
Received: 20 March 2019 / Revised: 23 April 2019 / Accepted: 25 April 2019 / Published: 30 April 2019
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Abstract

Background: Fucoidans are interesting for potential usage in ophthalmology, and especially age-related macular degeneration. However, fucoidans from different species may vary in their effects. Here, we compare fucoidans from five algal species in terms of oxidative stress protection and vascular endothelial growth factor (VEGF) interference in ocular cells. Methods: Brown algae (Fucus vesiculosus, Fucus distichus subsp. evanescens, Fucus serratus, Laminaria digitata, Saccharina latissima) were harvested and fucoidans isolated by hot-water extraction. Fucoidans were tested in several concentrations (1, 10, 50, and 100 µg/mL). Effects were measured on a uveal melanoma cell line (OMM-1) (oxidative stress), retinal pigment epithelium (RPE) cell line ARPE19 (oxidative stress and VEGF), and primary RPE cells (VEGF). Oxidative stress was induced by H2O2 or tert-Butyl hydroperoxide (TBHP). Cell viability was investigated with methyl thiazolyl tetrazolium (MTT or MTS) assay, and VEGF secretion with ELISA. Affinity to VEGF was determined by a competitive binding assay. Results: All fucoidans protected OMM-1 from oxidative stress. However, in ARPE19, only fucoidan from Saccharina latissima was protective. The affinity to VEGF of all fucoidans was stronger than that of heparin, and all reduced VEGF secretion in ARPE19. In primary RPE, only the fucoidan from Saccharina latissima was effective. Conclusion: Among the fucoidans from five different species, Saccharina latissima displayed the most promising results concerning oxidative stress protection and reduction of VEGF secretion. View Full-Text
Keywords: fucoidan; age-related macular degeneration; VEGF; oxidative stress; Saccharina latissima; Fucus vesiculosus; Fucus distichus subsp. evanescens; Fucus serratus; Laminaria digitata fucoidan; age-related macular degeneration; VEGF; oxidative stress; Saccharina latissima; Fucus vesiculosus; Fucus distichus subsp. evanescens; Fucus serratus; Laminaria digitata
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Dörschmann, P.; Bittkau, K.S.; Neupane, S.; Roider, J.; Alban, S.; Klettner, A. Effects of Fucoidans from Five Different Brown Algae on Oxidative Stress and VEGF Interference in Ocular Cells. Mar. Drugs 2019, 17, 258.

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