Activation of TRPV1 and TRPA1 by Black Pepper Components

作者：Okumura Yukiko; Narukawa Masataka; Iwasaki Yusaku; Ishikawa Aiko; Matsuda Hisashi; Yoshikawa Masayuki; Watanabe Tatsuo^*

来源：Bioscience Biotechnology and Biochemistry, 2010, 74(5): 1068-1072.

DOI：10.1271/bbb.90964

• pepper
• piperine
• transient receptor potential cation channel
• subfamily V, member 1 (TRPV1)
• transient receptor potential cation channel, subfamily A, member 1 (TRPA1)
• intracellular calcium concentration

We searched in this study for novel agonists of transient receptor potential cation channel, subfamily V, member 1 (TRPV1) and transient receptor potential cation channel, subfamily A, member 1 (TRPA1) in pepper, focusing attention on 19 compounds contained in black pepper. Almost all the compounds in HEK cells heterogeneously expressed TRPV1 or TRPA1, increased the intracellular Ca2+ concentration ([Ca2+](i)) in a concentration-dependent manner. Among these, piperine, isopiperine, isochavicine, piperanine, pipernonaline, dehydropipernonaline, retrofractamide C, piperolein A, and piperolein B relatively strongly activated TRPV1. The EC50 values of these compounds for TRPV1 were 0.6-128 mu m. Piperine, isopiperine, isochavicine, piperanine, piperolein A, piperolein B, and N-isobutyl-(2E,4E)-tetradeca-2,4-diamide also relatively strongly activated TRPA1, the EC50 values of these compounds for TRPA1 were 7.8-148 mu M. The Ca2+ responses of these compounds for TRPV1 and TRPA1 were significantly suppressed by co-applying each antagonist. We identified in this study new transient receptor potential (TRP) agonists present in black pepper and found that piperine, isopiperine, isochavicine, piperanine, piperolein A, and piperolein B activated both TRPV1 and TRPA1.

• 出版日期2010-5