STAT3-inhibitory activity of sesquiterpenoids and diterpenoids from Curcuma phaeocaulis

Hyun Jae Jang, Hyung Jin Lim, Eun Jae Park, Seung Jae Lee, Soyoung Lee, Seung Woong Lee, Mun Chual Rho

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Three new sesquiterpenoids (compounds 4, 5, and 26), along with 23 known sesquiterpenoids (compounds 1–3 and 6–25) and two diterpenoids (compounds 27 and 28), were obtained from Curcuma phaeocaulis, and their chemical structures were determined through nuclear magnetic resonance (NMR), circular dichroism (CD), and high-resolution electrospray ionization (HRESIMS) spectroscopic data, which were compared to the data from previous studies. All isolates were tested for inhibitory activity against interleukin (IL)-6-stimulated STAT3 expression using a luciferase reporter assay, and curzerenone (21) and 8-epi-galanolactone (28) displayed promising signal transducer and activator of transcription (STAT3)-inhibitory activities with IC50 values of 4.8 and 4.1 μM, respectively. In addition, these candidates significantly suppressed the mRNA expression levels of the proinflammatory genes IL-1β and C-reactive protein (CRP) via blockade of the IL-6-activated Janus kinase 2 (JAK2)/STAT3 and ERK-MAPK signaling pathways. These results suggest that curzerenone (21) and 8-epi-galanolactone (28) may be potential candidates for ameliorating severe inflammatory diseases.

Original languageEnglish
Article number103267
JournalBioorganic Chemistry
Volume93
DOIs
StatePublished - Dec 2019

Keywords

  • Anti-inflammation
  • Curcuma phaeocaulis
  • IL-6
  • STAT3
  • Terpenes

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