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Structural polymeric features that contribute to in vitro immunostimulatory activity of instant coffee

Title
Structural polymeric features that contribute to in vitro immunostimulatory activity of instant coffee
Type
Article in International Scientific Journal
Year
2018
Authors
Ferreira, SS
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Passos, CP
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Cepeda, MR
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Lopes, GR
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Teixeira Coelho, M
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Madureira, P
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Nunes, FM
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Manuel Vilanova
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ICBAS
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Coimbra, MA
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Journal
Title: Food ChemistryImported from Authenticus Search for Journal Publications
Vol. 242
Pages: 548-554
ISSN: 0308-8146
Publisher: Elsevier
Other information
Authenticus ID: P-00N-1MS
Abstract (EN): An instant coffee fraction, rich in arabinogalactans, obtained by ultrafiltration, using 1 and 5 kDa membranes, has previously shown in vitro stimulatory activity on BALB/c mice spleen B lymphocytes. The compounds inducing lymphocytic activation were shown to elute, mainly near the void volume by size-exclusion chromatography, using Bio-Gel P6 (1-6 kDa). Treatment of the compounds with chymotrypsin, a digestive protease, did not affect the induced B lymphocyte activation. On the contrary, hydrolysis with an alpha-L-arabinofuranosidase, removing single terminally-linked arabinose residues, decreased the extent of B cell activation. The immunostimulatory activity of these compounds was also observed by in vitro experiments, using bone marrowderived macrophages and dendritic cells as responders. Altogether, these results show the relevance of single arabinose residues, present at the non-reducing end of polymeric compounds, to the coffee stimulatory activity in cells mediating innate and acquired immunity.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 7
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