Paeoniflorin inhibits proliferation of fibroblast-like synoviocytes through suppressing G-protein-coupled receptor kinase 2

Jing Yu Chen, Hua Xun Wu, Yin Chen, Ling Ling Zhang, Qingtong Wang, Wu Yi Sun, Wei Wei

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Paeoniflorin (Pae) is a monoterpene glucoside and the main component of the total glucosides of paeony (TGP) extracted from the roots of Paeonia lactiflora. Its anti-inflammatory effect is associated with regulating G-protein-coupled receptors (GPCRs) signaling. The aim of this study was to explore the expression change of G-protein-coupled receptor kinase 2 (GRK2) in fibroblast-like synoviocytes (FLS) and the effect of Pae. Pae was obtained and purified from the roots of Paeonia lactiflora. We investigated the expression of GRK2 in synovium during the inflammatory process and assessed the effects of a specific GRK2 inhibitor and Pae on proliferation, cAMP level, and protein kinase A (PKA) activity of FLS in vitro. Additionally, the effect of Pae on GRK2 expression in FLS was detected in vitro. Expression of GRK2 in synovium from CIA rats increased during the inflammatory process. The specific GRK2 inhibitor suppressed proliferation and increased the cAMP level as well as PKA activity of FLS, and Pae had the same effects. Furthermore, Pae decreased GRK2 expression in FLS in vitro. Our results indicate that a chronic inflammatory process in CIA induces upregulation of GRK2 expression in FLS, and Pae can reverse this change, which might be one of the important mechanisms for Pae regulating GPCRs signaling and suppressing the proliferation of FLS in CIA.

Original languageEnglish (US)
Pages (from-to)665-671
Number of pages7
JournalPlanta Medica
Issue number7
StatePublished - Mar 13 2012
Externally publishedYes


  • collagen-induced arthritis
  • fibroblast-like synoviocytes
  • G-protein-coupled receptor kinase 2
  • Paeonia lactiflora
  • Paeoniaceae
  • paeoniflorin

ASJC Scopus subject areas

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry


Dive into the research topics of 'Paeoniflorin inhibits proliferation of fibroblast-like synoviocytes through suppressing G-protein-coupled receptor kinase 2'. Together they form a unique fingerprint.

Cite this