Fast preparation of rhamnogalacturonan I enriched low molecular weight pectic polysaccharide by ultrasonically accelerated metal-free Fenton reaction
Authors
Li, Junhui
Li, Shan
Zheng, Yangfan
Zhang, Hua
Chen, Jianle
Yan, Lufeng
Ding, Tian
Linhardt, Robert J.
Orfila, Caroline
Liu, Donghong
ORCID
https://orcid.org/0000-0003-2219-5833
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Other Contributors
Issue Date
2019-10-01
Keywords
Biology , Chemistry and chemical biology , Chemical and biological engineering , Biomedical engineering
Degree
Terms of Use
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Full Citation
Fast preparation of rhamnogalacturonan I enriched low molecular weight pectic polysaccharide by ultrasonically accelerated metal-free Fenton reaction, J. Li, S. Li, H. Zhang, Y. Zheng, J. Chen, L. Yan, T. Ding, R.J. Linhardt, C. Orfila, D. Liu, X. Ye, S. Chen, Food Hydrocolloids, 95, 551-561, 2019.
Abstract
The recovery of pectic polysaccharides with high rhamnogalacturonan I (RG-I) branches from citrus canning processing water was achieved in a previous study aimed at reducing chemical oxygen demand and benefiting both process economics and the environment. However, the large molecular size and poor in vivo bioavailability of these polysaccharides limit the application of these pectic polysaccharides in functional foods. We report the development of an ultrafast and green approach to depolymerize pectic polysaccharides using an ultrasound-accelerated metal-free Fenton chemistry, relying on H2O2/ascorbic acid. The results show that ultrasound enhances the efficiency of H2O2/ascorbic acid system to degrade pectin into 7.9 kDa pectic fragments within 30 min through both chemical effects (increasing the amount of hydroxyl radicals and lowering activation energy of H2O2 decomposition) and mechanical effects (disaggregating polysaccharide clusters). The backbones of the resulting fragments mainly correspond to RG-I patterns (molar ratio galacturonic acid (GalA): rhamnose (Rha) ∼ 1.06:1) with a high degree of rhamnose branching. Free radicals preferentially act on the GalA backbone in the HG region and maintain the RG-I region. Antitumor activities, assessed using human breast cancer cells (MCF-7), suggest that the resulting fragments significantly inhibit cancer cell growth and that activity increases with decreasing molecular weight. The resulting ultralow molecular weight pectic fragments have potential application for the development of functional foods and antitumor drugs.
Description
Food Hydrocolloids, 95, 551-561
Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
Note : if this item contains full text it may be a preprint, author manuscript, or a Gold OA copy that permits redistribution with a license such as CC BY. The final version is available through the publisher’s platform.
Department
The Linhardt Research Labs.
The Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS)
The Shirley Ann Jackson, Ph.D. Center for Biotechnology and Interdisciplinary Studies (CBIS)
Publisher
Relationships
The Linhardt Research Labs Online Collection
Rensselaer Polytechnic Institute, Troy, NY
Food Hydrocolloids
https://harc.rpi.edu/
Rensselaer Polytechnic Institute, Troy, NY
Food Hydrocolloids
https://harc.rpi.edu/
Access
https://login.libproxy.rpi.edu/login?url=https://doi.org/10.1016/j.foodhyd.2018.05.025