Biomedical Science Letters (대한의생명과학회지)

The Korean Society for Biomedical Laboratory Sciences (대한의생명과학회)
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Inhibitory Effects of Extracts of Houttuynia cordata Thumb (Saururaceae) on Cytokine Release of Human Monocytic THP-1 Cells and Human Eosinophilic EoL-1 Cells

  • Lee, Ji-Sook (Department of Clinical Laboratory Science, Wonkwang Health Science University)
  • Received : 2010.10.19
  • Accepted : 2010.12.10
  • Published : 2010.12.31
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Abstract

In the present study, we investigated whether Houttuynia cordata Thumb (Saururaceae; HC) extracts have an anti-inflammatory effect in human monocytic THP-1 cells and human eosinophilic EoL-1 cells. The dried and powdered whole plants of HC were extracted with 80% EtOH. The combined extract (HC-1) was concentrated under reduced pressure. The residue was diluted with water, and then successively partitioned with n-hexane, EtOAc, and BuOH to produce the n-hexane (HC-2), EtOAc (HC-3), BuOH (HC-4), and the water-soluble fractions (HC-5), respectively. HC extracts have no cytotoxicity on THP-1 cells and EoL-1 cells at a high concentration of $10\;{\mu}g/ml$ for 24 h, except HC-2 extract ($10\;{\mu}g/ml$). Interleukin-6, Interleukin-8 and Monocyte chemoattractant protein-1 in THP-1 cells were increased after the treatment with the extract from house dust mite or LPS. The increase of cytokine production was strongly suppressed by HC-3 extract, in comparision with other extracts. HC-3 also had inhibitory effect on Interleukin-6 production increased by mite extract and LPS in EoL-1 cells. However, HC-3 extract increased Interleukin-8 production induced by mite extract and LPS in EoL-1 cells. These results suggest that HC extracts may be used as useful agents for treating allergic disorders such as asthma and atopic dermatitis.

Keywords

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