Anti-apoptotic Activity of Laminarin Polysaccharides and their Enzymatically Hydrolyzed Oligosaccharides from Laminaria japonica |
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Authors: | Ki-Hoon Kim Yea-Woon Kim Han Bok Kim Burm Jong Lee Dong Seok Lee |
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Institution: | (1) Department of Biomedical Laboratory Science and Biohealth Products Research Center, Inje University, Gimhae, 621-749, Republic of Korea;(2) Department of Life Science, Hoseo University, Asan, 336-795, Republic of Korea;(3) Department of Chemistry and Biohealth Products Research Center, Inje University, Gimhae, 621-749, Republic of Korea |
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Abstract: | Laminarin polysaccharides (LP1) were prepared from Laminaria japonica, a marine brown alga with potential biological activities, by hot water extraction, ultrafiltration and gel chromatography;
the molecular weights of the LP1s were between 5 and 10 kDa. Laminarin oligosaccharides (LO) derived by hydrolyzing LP1 with
an endo-β-(1→3)-glucanase from Bacillus circulans were mainly di- and penta-oligosaccharides. Treatment of mouse thymocytes with LO or LP1 (1–4 mg ml−1) suppressed apoptotic death around 3- or 2-fold and extended cell survival in culture at a rate of about 30 or 20%. A mouse
cDNA microarray showing the genes coding for immune response proteins were induced and apoptotic cell death proteins were
reduced significantly by LO provided preliminary information regarding the immunomodulatory mechanism of LO. These results
suggest that laminarin oligosaccharides and polysaccharides can be utilized to develop new immunopotentiating substances and
functional alternative medicines.
Revisions requested 26 October 2005; Revisions received 19 December 2005 |
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Keywords: | apoptosis endo-β -(1→ 3)-glucanase laminarin microarray oligosaccharides |
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