| Description: |
Platyconic acid A suppresses the development of respiratory inflammation, hyperresponsiveness, and remodeling by reducing allergic responses, and it may be a potential herbal drug for allergen-induced respiratory disease prevention. Platyconic acid A suppresses PMA-induced MUC5AC mRNA expression by inhibiting NF-κB activation via Akt in A549 cells. |
| Targets: |
NF-kB | Akt | HCV |
| In vitro: |
| Evid Based Complement Alternat Med. 2013;2013:560417. | | Triterpenoid Saponins Isolated from Platycodon grandiflorum Inhibit Hepatitis C Virus Replication.[Pubmed: 24489585 ] | Hepatitis C virus (HCV) infection is a major cause of liver disease, including cirrhosis and hepatocellular carcinoma. Due to significant adverse effects and emergence of resistant strains of currently developed anti-HCV agents, plant extracts have been considered to be potential sources of new bioactive compounds against HCV.
The aim of this study was to evaluate the functional effects of triterpenoid saponins contained in the root extract of Platycodon grandiflorum (PG) on viral enzyme activities and replication in both HCV replicon cells and cell culture grown HCV- (HCVcc-) infected cells.
METHODS AND RESULTS:
Inhibitory activities of triterpenoid saponins from PG were verified by NS5B RNA-dependent RNA polymerase assay and were further confirmed in the context of HCV replication. Six triterpenoid saponins (platycodin D, platycodin D2, platycodin D3, deapioplatycodin D, deapioplatycodin D2, and Platyconic acid A), PG saponin mixture (PGSM), were identified as active components exerting anti-HCV activity. Importantly, PGSM exerted synergistic anti-HCV activity in combination with either interferon- α or NS5A inhibitors. We demonstrated that combinatorial treatment of PGSM and IFN- α efficiently suppressed colony formation with significant reduction in drug resistant variant of HCV.
CONCLUSIONS:
These data suggest that triterpenoid saponin may represent a novel anti-HCV therapeutic agent. |
|
| In vivo: |
| J Agric Food Chem. 2015 Feb 11;63(5):1468-76. | | Saponins, especially platyconic acid A, from Platycodon grandiflorum reduce airway inflammation in ovalbumin-induced mice and PMA-exposed A549 cells.[Pubmed: 25590691] |
METHODS AND RESULTS:
We investigated the inhibitory effects of Platycodon grandiflorum root-derived saponins (Changkil saponins: CKS) on ovalbumin-induced airway inflammation in mice. CKS suppressed leukocytes number, IgE, Th1/Th2 cytokines, and MCP-1 chemokine secretion in bronchoalveolar lavage fluid. Also, ovalbumin-increased MUC5AC, MMP-2/9, and TIMP-1/-2 mRNA expression, NF-κB activation, leukocytes recruitment, and mucus secretion were inhibited by CKS treatment. Moreover, the active component of CKS, platyconic acid A (PA), suppressed PMA-induced MUC5AC mRNA expression (from 2.1 ± 0.2 to 1.1 ± 0.1) by inhibiting NF-κB activation (from 2.3 ± 0.2 to 1.2 ± 0.1) via Akt (from 3.7 ± 0.3 to 2.1 ± 0.2) (p < 0.01) in A549 cells.
CONCLUSIONS:
Therefore, we demonstrate that CKS or PA suppressed the development of respiratory inflammation, hyperresponsiveness, and remodeling by reducing allergic responses, and they may be potential herbal drugs for allergen-induced respiratory disease prevention. |
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