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Marine Dietary Fiber in Foods: From Molecular Characterisation to Gut...
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Marine Dietary Fiber in Foods: From Molecular Characterisation to Gut Health

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Food Physics and (Bio)Chemistry".

Deadline for manuscript submissions: 21 November 2025 | Viewed by 2555

Special Issue Editors

Prof. Dr. Shuang Song

E-Mail Website
Guest Editor
School of Food Science and Technology, Dalian Polytechnic University, Dalian, China
Interests: marine polysaccharide; polysaccharide characterization; oligosaccharide identification; polysaccharide degradation; bioactivity and function of polysaccharides; gut microbiota; dietary fiber
Special Issues, Collections and Topics in MDPI journals
Dr. Zhengqi Liu

E-Mail Website
Guest Editor
National Engineering Research Center of Seafood, School of Food Science and Technology, Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian, China
Interests: polysaccharides; gut microbiota

Special Issue Information

Dear Colleagues,

The ocean is a treasure trove of food, teeming with a diverse array of dietary fibers found in its flora, fauna, and microorganisms. Abundant empirical data substantiate the positive impact of dietary fiber on gut health, specifically in mitigating colonic inflammation, improving intestinal barrier function, and benefiting the gut ecosystem. These effects are ascribed to the interactions of dietary fiber with enterocytes and the regulatory influence exerted upon the gut microbiota. It is noteworthy that the biological functions of dietary fiber are intricately linked to their molecular architecture and structural characteristics. The structural characteristics of dietary fiber, derived from diverse biological sources, exhibit significant heterogeneity, characterized by variations in molecular weight, the constituent monosaccharide units, and the types of glycosidic linkages. Consequently, the elucidation of the structure-function relationship in dietary fiber has garnered escalating scholarly attention, underscoring the imperative for a deeper understanding of how their molecular configurations dictate their biological efficacies. The purpose of this Special Issue is to cover a broad spectrum of original research and reviews about the structural characterization and functional properties of marine dietary fiber foods:

  • Extraction and characterization of dietary fiber from marine foods;
  • Bioactivity of marine dietary fiber in gut health;
  • Interaction between marine dietary fiber and gut microbiota;
  • Advanced analytical techniques for structural characterization of marine dietary fiber;
  • Structure–function relationships of marine dietary fiber;
  • Application of marine dietary fiber to foods, nutraceuticals, or other products.

Prof. Dr. Shuang Song
Dr. Zhengqi Liu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Foods is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2900 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • marine polysaccharides
  • dietary fiber
  • hydrophilic colloid
  • biomacromolecule
  • biopolymer
  • intestinal inflammation
  • colitis
  • gut microbiota
  • algae
  • seafood

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Published Papers (2 papers)

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Research

14 pages, 3639 KiB  
Article
Polysaccharides from Sea Cucumber (Stichopus japonicus) Synergize with Anti-PD1 Immunotherapy to Reduce MC-38 Tumor Burden in Mice Through Shaping the Gut Microbiome
by Jiahui Li, Jinhui Jia, Yue Teng, Xiaojuan Wang, Xiaojun Xia, Shuang Song, Beiwei Zhu and Xiaodong Xia
Foods 2025, 14(3), 387; https://doi.org/10.3390/foods14030387 - 24 Jan 2025
Cited by 1 | Viewed by 1126
Abstract
Immune checkpoint inhibitors (ICIs) have revolutionized cancer treatment and significantly improved outcomes for patients with certain malignancies. However, immunotherapy with ICIs is only effective in a subset of patients and the gut microbiota have been identified as an important factor associated with response [...] Read more.
Immune checkpoint inhibitors (ICIs) have revolutionized cancer treatment and significantly improved outcomes for patients with certain malignancies. However, immunotherapy with ICIs is only effective in a subset of patients and the gut microbiota have been identified as an important factor associated with response to ICI therapy. Polysaccharides from sea cucumber (Stichopus japonicus) (SCP) have been shown to modulate the gut microbiota and exhibit beneficial health functions, but whether SCP could synergize with anti-PD1 immunotherapy remains unexplored. In this study, mice with ICI-sensitive MC38 tumors were treated with anti-PD1 antibody after supplementation with or without SCP to examine the potential impact of SCP on the efficacy of immunotherapy. SCP strongly amplified the anti-tumor activity of anti-PD1 in MC38 tumor-bearing mice. Flow cytometry and immunohistological staining demonstrated that SCP treatment increased cytotoxic CD8+ T lymphocytes while decreasing regulatory Foxp3+ CD4+ T lymphocytes. Gut microbiota and metabolomic analysis revealed that SCP modulated the microbiota and increased the abundance of certain metabolites such as indole-3-carboxylic acid. Furthermore, fecal microbiota transplantation experiments justified that the synergistic effect of SCP with anti-PD1 was partially mediated through the gut microbiota. Mice receiving microbiota from SCP-treated mice showed a boosted response to anti-PD1, along with enhanced anti-tumor immunity. These findings indicate that SCP could be utilized as a dietary strategy combined with anti-PD1 therapy to achieve improved outcomes in patients. Full article
(This article belongs to the Special Issue Marine Dietary Fiber in Foods: From Molecular Characterisation to Gut Health)
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17 pages, 4409 KiB  
Article
Anticoagulant Activity of the Polysaccharide Fromgonad of Abalone Haliotis discus hannai Ino: The Role of Conjugate Protein
by Qinhao Liu, Siyu Yao, Siyuan Ma, Ting Zhao, Zhenyu Wang, Liming Sun and Ming Du
Foods 2024, 13(24), 4003; https://doi.org/10.3390/foods13244003 - 11 Dec 2024
Viewed by 970
Abstract
Few studies are concerned with the effect of the conjugat protein on the bioactivities of the abalone gonad polysaccharide (AGP). In this study, a series of treatments, including raw material (female and male) defatting, extraction temperature (25–121 °C), proteolysis, ultrafiltration, and ethanol precipitation, [...] Read more.
Few studies are concerned with the effect of the conjugat protein on the bioactivities of the abalone gonad polysaccharide (AGP). In this study, a series of treatments, including raw material (female and male) defatting, extraction temperature (25–121 °C), proteolysis, ultrafiltration, and ethanol precipitation, was conducted to investigate the role of the conjugate protein on AGP anticoagulant activity. All AGP extracts significantly prolonged activated partial thromboplastin time (APTT) and thrombin time (TT). The strongest was observed in the female AGPs prepared at 50 and 121 °C. The most active is located at 30–300 kDa by ultrafiltration. After being exposed to neutral protease, quick shortening of APTT and TT was found in all AGPs. Further ethanol precipitating of found the longest APTT in the sediment, which contains most polysaccharides and proteins. Defatting lowered the activity of female AGP but increased that of males. Proteolysis also significantly weakened the clotting factor inhibition effect of the 50 °C female AGP, but heating seemed not affect the effect. Five fractions were obtained after the 50 °C female AGP was subjected to ion exchange column. Fraction V, with the highest protein and medium polysaccharide content, showed the strongest anticoagulant effect and was also much higher than AGSP, which was obtained by multi-step proteolysis. The findings supported positive effect of the conjugate protein in AGP anticoagulant activity. Full article
(This article belongs to the Special Issue Marine Dietary Fiber in Foods: From Molecular Characterisation to Gut Health)
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