Background TNF-alpha (TNF-α) and interleukin-6 (IL-6) are one of the molecules which have been the targets of interest in rheumatoid arthritis (RA). Among the therapeutic strategies, simultaneous modulation of the two is regarded as providing the stability on the networks of the relevant molecules and sufficient profile for multi-therapeutic targets.
Objectives To characterise multiple molecule-modulating profile of TNF-α and IL-6, we experimented the anti-inflammatory phenotypes of the two by adopting well-known therapeutic, methotrexate (MTX) and newly recognised herbal, aconite (Aconitum carmichaelii) in the setting of interferon-gamma-induced inflammatory toxicity in macrophage.
Methods Mouse macrophage Raw264.7 cells were treated with MTX (0.01–1 mM) and processed aconite (Aconibal®, 0.01–1 mg/mL). The levels of TNF-α and IL-6 were measured by spectrophotometre (VersaMax ELISA, Molecular devices, USA), then, as a parametric approach, median and dose effect were analysed to calculate the combination index (CI) and standard isobologramme were presented using CalcuSyn software (CalcuSyn 2.0, Biosoft, UK).
Results Anti-inflammatory phenotypes of TNF-α and IL-6 level were shown in aconite dose-dependent manner. The doses of 0.75 mg/mL of aconite and 0.25 mM of MTX indicated the lowest CI as 0.272 for TNF-α and 7916 for IL-6, which was sparing effect compared with single treat by 3.9 mM and 0.6 mM of MTX, respectively. Reflecting the response, TNF-α was modulated with the synergistic profiles in normalised isobologramme.
Conclusions Stable modulation of TNF-α and IL-6 and synergistic response on TNF-α were characterised. Further approaches on network stability of the relevant molecules are needed.
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Acknowledgement The study was funded by Korea Institute of Oriental Medicine (KIOM) which grant number was K16253.
Disclosure of Interest None declared
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