Cited by 224Seaweed-derived Bioactive CompoundsPolysaccharides Composition and ApplicationsFungal Biology and Applications

Isolation of Three High Molecular Weight Polysaccharide Preparations with Potent Immunostimulatory Activity from Spirulina platensis,Aphanizomenon flos-aquae and Chlorella pyrenoidosa

Pugh, Nirmal, Ross, Samir, ElSohly, Hala, ElSohly, Mahmoud, Pasco*, David·2001·Planta Medica

Abstract

This research describes the identification of three new high molecular weight polysaccharide preparations isolated from food-grade microalgae that are potent activators of human monocytes/macrophages: "Immulina" from Spirulina platensis, "Immunon" from Aphanizomenon flos-aquae, and "Immurella" from Chlorella pyrenoidosa. These polysaccharides are structurally complex and have estimated molecular weights above ten million daltons. All three polysaccharides are highly water soluble and comprise between 0.5 % and 2.0 % of microalgal dry weight. Immunostimulatory activity was measured using a transcription factor-based bioassay for nuclear factor kappa B (NF-kappa B) activation in THP-1 human monocytes/macrophages. Using this system the EC(50) values for these microalgal polysaccharides are between 20 and 110 ng/ml (about 10pM). THP-1 activation was confirmed by measuring immune cytokine mRNA induction using reverse transcriptase-polymerase chain reaction (RT-PCR). Each polysaccharide substantially increased mRNA levels of interleukin-1beta (IL-1beta) and tumor necrosis factor-alpha (TNF-alpha). These polysaccharides are between one hundred and one thousand times more active for in vitro monocyte activation than polysaccharide preparations that are currently used clinically for cancer immunotherapy.

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Crossref · 10.1055/s-2001-18358

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  • A study in Denmark on experimental animals and humans testified that Immulina was highly active against Candida albicans and tetanus.

    “A study in Denmark on experimental animals and humans testified that Immulina was highly active against Candida albicans and tetanus [76].”
  • Immulina has immunostimulatory activity and increases IL-1β and TNF-α expression by inducing NF-kappa B pathway.

    “the high molecular weight polysaccharide Immulina has been reported have immunostimulatory activity [70–72] and increased IL-1β and TNF-α expression by inducing NF-kappa B pathway [72].”
  • High molecular weight polysaccharides from the fresh water Spirulina platensis and related species were between one hundred and one thousand times more immuno-active than polysaccharide preparations from other biological sources that are used clinically for cancer immunotherapy.

    “High molecular weight polysaccharides from the fresh water Spirulina platensis and related species [120] were between one hundred and one thousand times more immuno-active than polysaccharide preparations from other biological sources that are used clinically for cancer immunotherapy.”

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Authors
Pugh, N., Ross, S., ElSohly, H., ElSohly, M., & Pasco*, D.
Affiliations
University of Mississippi (US)
Venue
Planta Medica
Published
2001-11
Volume
67
Issue
08
Pages
737-742
ISSN
  • 0032-0943 (ISSN-L)
  • 1439-0221
OpenAlex
W2091116978
Cited by
224
References
0
Citations by year
2026: 6 · 2025: 8 · 2024: 8 · 2023: 8 · 2022: 11 · 2021: 13 · 2020: 15 · 2019: 18 · 2018: 10 · 2017: 7 · 2016: 12 · 2015: 10 · 2014: 6 · 2013: 12 · 2012: 17
FWCI
4.89
Type
journal article
Language
en
Open access
closed
Locations
  • Planta Medica (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Polysaccharides Composition and Applications
  • Health Sciences › Medicine › Pharmacology › Fungal Biology and Applications
Keywords
high molecular weight polysaccharides, immune enhancement, microalgae, Spirulina platensis, Aphanizomenon flos-aquae, Chlorella pyrenoidosa, monocyte/macrophage activation, NF-κB activation, THP-1 cells, IL-1β, TNF-α, cancer immunotherapy
MeSH terms
Adjuvants, Immunologic, Cyanobacteria, Chlorella, Humans, Interleukin-1, Macrophages, Molecular Weight, Monocytes, Polysaccharides, Polysaccharides, Bacterial, Tumor Necrosis Factor-alpha, NF-kappa B, Plant Preparations

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