Marine-derived polysaccharides and peptides as next-generation immunomodulators: Molecular mechanisms, therapeutic potential, and translational challenges.
Marine peptides are stealing the spotlight as fresh contenders in the hunt for new immunomodulators. Researchers are pulling these bioactive compounds from fish, mollusks, and marine microbes, and the results are catching attention. Unlike most terrestrial sources, marine ecosystems push evolution in wild directions, leading to peptides and polysaccharides packed with unique structures and functions.
Adv Protein Chem Struct Biol
by Chandrasekaran K, Desai D, Singh SK et al.
“Marine-derived polysaccharides and peptides as next-generation immunomodulators: Molecular mechanisms, therapeutic potential, and translational challenges. Chandrasekaran K(1), Desai D(2), Singh SK(3), Manoharan J(4), Selvaraj C(5). Author information: (1)Department of Anatomy, All India Institute of Medical Sciences (AIIMS), Nagpur, Maharashtra, India. (2)Department of Microbiology, Dr. D. Y. Patil Medical College Hospital and Research Centre, Dr. D. Y. Patil Vidyapeeth (Deemed to be University), Pimpri, Pune, India. (3)Computer Aided Drug Design and Molecular Modeling Lab, Department of Bioinformatics, Alagappa University, Karaikudi, India. (4)Electric Power Research Institute, 1300 W W T Harris Blvd, Charlotte, NC, United States. (5)CSRDD Lab, Bioinformatics Division, Department of Marine Biotechnology, AMET University (Deemed to Be University), East Coast Road, Kanathur, Chennai, Tamil Nadu, India. Electronic address: csrddlab@gmail.com. Marine-derived polysaccharides and peptides have emerged as innovative immunomodulatory agents offering distinct structural features and multimodal biological activities not commonly found in terrestrial sources. Environmental pressures in marine ecosystems drive the evolution of diverse sulfated polysaccharides, antimicrobial peptides, and bioactive macromolecules capable of modulating both innate and adaptive immune responses. Polysaccharides such as fucoidan, carrageenan, ulvan, chitin, and chitosan demonstrate potent engagement of pattern recognition receptors, enhancement of antigen presentation, and immunological reprogramming of macrophages, dendritic cells, and natural killer cells. Marine peptides derived from fish, mollusks, and marine microbes combine direct antimicrobial effects with regulation of cytokine balance, T-cell differentiation, and tissue repair pathways. Synergistic strategies integrating polysaccharides and peptides in nanoscale delivery systems and conjugate vaccines show increased immunogenicity and therapeutic benefit across oncology, infectious diseases, and inflammatory disorders. Despite this promise, translation of marine immunomodulators into clinical practice is restricted by structural heterogeneity, limited bioavailability, and a lack of harmonized analytical and regulatory frameworks. Advances in multi-omics technologies, systems immunology, and machine learning, guided design are enabling deeper mechanistic understanding and rational optimization of marine bioactives. Concurrently, the development of sustainable aquaculture, biorefinery systems, and controlled bioprocessing supports scalable and environmentally responsible production. This chapter provides the recent molecular insights, therapeutic opportunities, and emerging translational strategies for marine-derived polysaccharides and peptides, while outlining key challenges and future priorities. Together, these innovations position marine immunomodulators as promising candidates for next-generation immunotherapy, vaccine adjuvant development, and global health applications. Copyright © 2026. Published by Elsevier Inc.”
Here’s what makes these marine-derived peptides stand out:
Direct immunomodulation — they tweak both innate and adaptive immune responses.
Potent synergy — when combined with marine polysaccharides like fucoidan or chitosan, the immune effects ramp up, especially in nanoscale delivery systems and vaccine conjugates.
Multiple mechanisms — these compounds can hit pattern recognition receptors, shift cytokine balance, and even help tissue repair. That's a broad toolkit for tackling oncology, infectious diseases, and inflammatory conditions.
There’s more: the research community is getting smarter about how to design, analyze, and produce these compounds. Multi-omics, systems immunology, and machine learning are making it easier to understand what works and how. On the production side, sustainable aquaculture and bioprocessing mean scale isn’t the bottleneck it used to be.
The main hurdles right now are structural complexity, bioavailability, and regulatory clarity. But with rapid progress in analytics and biotech, those barriers look more like speedbumps than roadblocks.
Key takeaway: Marine-derived peptides aren’t just another research fad. They offer real possibilities for next-gen immunotherapies, vaccine adjuvants, and more. If you’re exploring new research angles, these marine bioactives should be on your radar.
For more on the latest in peptide research and compound sourcing, check out our peptide research index and vendor directory. The marine wave is just getting started.
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