Cited by 109Immune Response and InflammationSeaweed-derived Bioactive CompoundsImmunotherapy and Immune Responses

Toll-like receptor 2-dependent activation of monocytes by Spirulina polysaccharide and its immune enhancing action in mice

Balachandran, Premalatha, Pugh, Nirmal D., Ma, Guoyi, Pasco, David S.·2006·International Immunopharmacology

Abstract

We reported previously that a high molecular weight polysaccharide fraction (Immulina) from Spirulina was a potent activator of NF-kappa B and induced both IL-1 beta and TNF-alpha mRNAs in THP-1 human monocytes. In the present study, we show that NF-kappa B activation by Immulina is suppressed by antibodies to CD14 and TLR2 but not by antibodies to TLR4. Similarly, NF-kappa B directed luciferase expression was enhanced by Immulina treatment when cells were co-transfected with vectors expressing proteins supporting TLR2- (CD14 and TLR2) but not TLR4-(CD14, TLR4, and MD-2) dependent activation. Mice that consumed a chemically defined chow mixed with an extract containing Immulina exhibited changes in several immune parameters. The ex vivo production of IgA and IL-6 from Peyer's patch cells was enhanced 2-fold and interferon-gamma production from spleen cells was increased 4-fold in Immulina-treated mice. The enhanced production of these factors was most notable with mice that had consumed this extract for 4 or 5 days. These studies shed light on how Immulina activates cells of the innate immune system and suggests that oral consumption of this polysaccharide can enhance components within both the mucosal and systemic immune systems.

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Crossref · 10.1016/j.intimp.2006.08.001

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Authors
Balachandran, P., Pugh, N. D., Ma, G., & Pasco, D. S.
Affiliations
University of Mississippi (US)
Corresponding author
Pasco, David S.
Venue
International Immunopharmacology
Publisher
Elsevier BV
Published
2006-12
Volume
6
Issue
12
Pages
1808-1814
ISSN
1567-5769 (ISSN-L)
OpenAlex
W2115909201
Cited by
109
References
31
Citations by year
2026: 3 · 2025: 3 · 2024: 9 · 2023: 10 · 2022: 7 · 2021: 10 · 2020: 3 · 2019: 3 · 2018: 7 · 2017: 7 · 2016: 3 · 2015: 4 · 2014: 2 · 2013: 4 · 2012: 10
FWCI
1.01
Type
journal article
Language
en
Open access
closed
Locations
  • International Immunopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Agricultural Research Service (58-6408-7-012)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Seaweed-derived Bioactive Compounds
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
TLR2, CD14, NF-κB activation, monocytes, innate immunity, immune enhancement, IgA, interleukin-6, interferon-gamma, Peyer's patches, oral administration, TLR4, MD-2
MeSH terms
Animals, Cell Line, Humans, Immunoglobulin A, Interferon-gamma, Monocytes, Peyer's Patches, Plant Extracts, Polysaccharides, Polysaccharides, Bacterial, Spleen, Interleukin-6, NF-kappa B, Lipopolysaccharide Receptors, Toll-Like Receptor 2, Mice, Spirulina

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