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A mechanism of low molecular weight fucoidans degraded by enzymatic and acidic hydrolysis for the prevention of UVB damage

Author:
Hwang, Pai-An, Yan, Ming-De, Kuo, Ko-Liang, Phan, Nam Nhut, Lin, Yen-Chang
Source:
Journal of applied phycology 2017 v.29 no.1 pp. 521-529
ISSN:
0921-8971
Subject:
Sargassum, acid hydrolysis, collagen, collagenase, dietary supplements, fucoidan, fucose, genes, human health, messenger RNA, molecular weight, protective effect, sulfates, transcription (genetics), transcription factors, transforming growth factors, ultraviolet radiation
Abstract:
Fucoidans have been long used as a food supplement due to their diverse pharmacological effects on human health. Low molecular weight fucoidan (LF) is a common form of fucoidans that has been shown to have enhanced biological activity. In the present study, fucoidans were extracted from the brown alga Sargassum hemiphyllum and enzyme-hydrolyzed into low and high molecular weight fucoidans (HF). The skin protective effects of LF, HF, and other fucoidans derivatives against ultraviolet B (UVB) damage were determined by measuring the expression levels of matrix metalloproteinase genes encoding collagenases (MMP-1, MMP-2, MMP-8, MMP-9, MMP-13), transforming growth factor β receptor II (TGFβRII), and type I procollagen. The results show that LF protects against UVB damage to the skin by inhibiting UVB-induced transcription factor activator protein-1 (AP-1)-stimulated transcription of MMP genes encoding collagenases (MMP-1, MMP-8, and MMP-13) and increasing TGFβRII mRNA levels to prevent the loss of TGFβRII that occurs during UVB-induced collagen degradation. Moreover, this study reveals that the biological properties of fucoidans are highly dependent on the fucose content, sulfate content, and molecular weight.
Agid:
5757023