Palmatine attenuates LPS-induced inflammatory response in mouse mammary epithelial cells through inhibiting ERK1/2, P38 and Akt/NF-кB signalling pathways

J Anim Physiol Anim Nutr (Berl). 2021 Jan;105(1):183-190. doi: 10.1111/jpn.13440. Epub 2020 Aug 31.

Abstract

Palmatine has a wide range of pharmacological effects and anti-inflammatory function. However, the effect of palmatine on LPS-induced inflammatory response of mammary epithelial cells has not been reported. In this research, we studied the anti-inflammatory mechanism of palmatine in EpH4-Ev (mouse mammary epithelial cells). EpH4-Ev cells were pre-treated with palmatine and then incubated with LPS. Cells were collected for examining production of pro-inflammatory mediators by qRT-PCR, and the related inflammatory signalling pathway was detected through immunofluorescence and Western blot. The results found that palmatine could significantly reduce the expression of IL-6, TNF-α, IL-1β and COX-2 in EpH4-Ev cells. Research on mechanisms found that palmatine could significantly inhibit the protein levels of p-Akt, p-P65, p-ERK1/2 and p-P38 in EpH4-Ev cells. In conclusion, these data suggested that palmatine inhibits inflammatory response in LPS-induced EpH4-Ev cells via down-regulating Akt/ NF-кB, ERK1/2 and P38 signalling pathways.

Keywords: Akt/NF-кB; ERK1/2; P38; inflammatory response; palmatine.

MeSH terms

  • Animals
  • Berberine Alkaloids
  • Epithelial Cells / metabolism
  • Lipopolysaccharides* / toxicity
  • MAP Kinase Signaling System
  • Mice
  • NF-kappa B / genetics
  • NF-kappa B / metabolism
  • Proto-Oncogene Proteins c-akt* / genetics
  • Proto-Oncogene Proteins c-akt* / metabolism

Substances

  • Berberine Alkaloids
  • Lipopolysaccharides
  • NF-kappa B
  • Proto-Oncogene Proteins c-akt
  • palmatine