Abstract
Recently, we reported that a native Fasciola hepatica fatty acid binding protein (FABP) termed Fh12 is a powerful anti-inflammatory protein capable of suppressing the LPS-induced expression of inflammatory markers in vivo and in vitro. Because the purification of a protein in native form is, in many situations not cost-beneficial and unsuitable for industrial grade scale-up, this study accomplished the task of optimizing the expression and purification of a recombinant form of FABP (Fh15). Additionally, we ascertained whether this molecule could exhibit a similar suppressive effect on TLR-stimulation and inflammatory cytokine expression from macrophages than those previously demonstrated for the native molecule. Results demonstrated that Fh15 suppresses the expression of IL-1β and TNFα in murine macrophages and THP1 Blue CD14 cells. Additionally, Fh15 suppress the LPS-induced TLR4 stimulation. This effect was not impaired by a thermal denaturing process or blocked by the presence of anti-Fh12 antibodies. Fh15 also suppressed the stimulation of various TLRs in response to whole bacteria extracts, suggesting that Fh15 could have a broad spectrum of action. These results support the possibility of using Fh15 as an excellent alternative for an anti-inflammatory drug in preclinical studies in the near future.
Publication types
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Research Support, N.I.H., Extramural
MeSH terms
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Animals
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Anti-Inflammatory Agents, Non-Steroidal / chemistry
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Anti-Inflammatory Agents, Non-Steroidal / metabolism
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Anti-Inflammatory Agents, Non-Steroidal / pharmacology*
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Antibodies, Neutralizing / pharmacology
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Cloning, Molecular
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Escherichia coli / genetics
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Escherichia coli / metabolism
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Fasciola hepatica / chemistry*
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Fasciola hepatica / metabolism
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Fatty Acid-Binding Proteins / chemistry
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Fatty Acid-Binding Proteins / isolation & purification
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Fatty Acid-Binding Proteins / metabolism
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Fatty Acid-Binding Proteins / pharmacology*
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Female
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Gene Expression
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Helminth Proteins / chemistry
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Helminth Proteins / isolation & purification
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Helminth Proteins / metabolism
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Helminth Proteins / pharmacology*
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Humans
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Interleukin-1beta / genetics
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Interleukin-1beta / immunology
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Lipopolysaccharides / antagonists & inhibitors*
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Lipopolysaccharides / pharmacology
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Macrophages / cytology
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Macrophages / drug effects
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Macrophages / immunology
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Mice
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Mice, Inbred C57BL
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Models, Molecular
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Protein Conformation, alpha-Helical
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Protein Conformation, beta-Strand
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Protein Structure, Tertiary
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Recombinant Fusion Proteins / chemistry
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Recombinant Fusion Proteins / genetics
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Recombinant Fusion Proteins / metabolism
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THP-1 Cells
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Toll-Like Receptor 4 / antagonists & inhibitors
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Toll-Like Receptor 4 / genetics
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Toll-Like Receptor 4 / immunology*
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Tumor Necrosis Factor-alpha / genetics
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Tumor Necrosis Factor-alpha / immunology
Substances
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Anti-Inflammatory Agents, Non-Steroidal
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Antibodies, Neutralizing
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Fatty Acid-Binding Proteins
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Helminth Proteins
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IL1B protein, human
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Interleukin-1beta
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Lipopolysaccharides
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Recombinant Fusion Proteins
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TLR4 protein, human
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Toll-Like Receptor 4
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Tumor Necrosis Factor-alpha