Effects of Some Natural Carotenoids on TRPA1- and TRPV1-Induced Neurogenic Inflammatory Processes In Vivo in the Mouse Skin

Györgyi Horváth, Ágnes Kemény, Loránd Barthó, Péter Molnár, József Deli, Lajos Szente, Tamás Bozó, Szilárd Pál, Katalin Sándor, Éva Szőke, János Szolcsányi, Zsuzsanna Helyes

Research output: Contribution to journalArticle

9 Citations (Scopus)


Mechanisms of the potent anti-inflammatory actions of carotenoids are unknown. Since carotenoids are incorporated into membranes, they might modulate transient receptor potential ankyrin 1 and vanilloid 1 (TRPA1 and TRPV1) activation predominantly on peptidergic sensory nerves. We therefore investigated the effects of three carotenoids (β-carotene, lutein and lycopene) on cutaneous neurogenic inflammation. Acute neurogenic edema and inflammatory cell recruitment were induced by smearing the TRPA1 agonist mustard oil (5 %) or the TRPV1 activator capsaicin (2.5 %) on the mouse ear. Ear thickness was then determined by micrometry, microcirculation by laser Doppler imaging and neutrophil accumulation by histopathology and spectrophotometric determination of myeloperoxidase activity. The effects of lutein on the stimulatory action of the TRPA1 agonist mustard oil were also tested on the guinea-pig small intestine, in isolated organ experiments. Mustard oil evoked 50–55 % ear edema and granulocyte influx, as shown by histology and myeloperoxidase activity. Swelling was significantly reduced between 2 and 4 h after administration of lutein or β-carotene (100 mg/kg subcutane three times during 24 h). Lutein also decreased neutrophil accumulation induced by TRPA1 activation, but did not affect mustard oil-evoked intestinal contraction. Lycopene had no effect on any of these parameters. None of the three carotenoids altered capsaicin-evoked inflammation. It is proposed that the dihydroxycarotenoid lutein selectively inhibits TRPA1 activation and consequent neurogenic inflammation, possibly by modulating lipid rafts.

Original languageEnglish
Pages (from-to)113-121
Number of pages9
JournalJournal of Molecular Neuroscience
Issue number1
Publication statusPublished - May 1 2015


  • Carotenoids
  • Intestinal contraction
  • Lipid rafts
  • Mustard oil
  • Skin inflammation
  • TRPA1 receptor
  • Transient receptor potential (TRP) vanilloid 1 ion channel (TRPV1)

ASJC Scopus subject areas

  • Cellular and Molecular Neuroscience

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