상세 정보

underline
Metadata Downloads : dc(xml) or Excel
Cited 0 time in scopus ci

Title 

Effect of Bioflavonoids Extracted from the Bark of Pinus maritima on Proinflammatory Cytokine Interleukin-1 Production in Lipopolysaccharide-Stimulated RAW 264.7

Authors 

Kyung Joo ChoChang Hyun YunDo Young YoonYoung Sik ChoGerald RimbachLester PackerAn Sik Chung

Publisher 

Elsevier

Issue Date 

2000

Citation 

Toxicology and Applied Pharmacology, vol. 168, no. 1, pp. 64-71

Keywords 

interleukin-1NF-κBAP-1RAW 264.7 macrophagespycnogenolfree radicals

Abstract 

Currently, bioflavonoids have been known to have strong antioxidant capacities, and a variety of efforts have been made to identify the utilities of bioflavonoids in treating various diseases based on their antioxidant capacities. The effects of bioflavonoids extracted from the bark of Pinus maritima Pycnogenol (PYC) on free radical formation, activation of redox sensitive transcription factors, as well as interleukin-1β (IL-1β) production were investigated in murine macrophage cell lines. PYC exerted strong scavenging activities against reactive oxygen species generated either by H2O2 or PMA in RAW 264.7 and IC-21 cells, respectively. In situ ELISA, immunoblot analysis, and competitive RT-PCR demonstrated that PYC pretreatment of LPS-stimulated RAW 264.7 cells dose-dependently reduced both the production of IL-1β and its mRNA levels. Furthermore, in the same cells, PYC blocked the activation of nuclear factor kappa B (NF-κB) and activator protein-1 (AP-1), two major transcription factors centrally involved in IL-1β gene expression. When RAW 264.7 cells were stimulated with LPS, the inhibitor protein IκB largely disappeared from cytosolic fractions. However, pretreatment of the cells with PYC abolished the LPS-induced IκB degradation. These results suggest that PYC can inhibit the expression of the proinflammatory cytokine IL-1 by regulating redox-sensitive transcription factors. This study may support the possibility that bioflavonoids including PYC can be used as antiinflammatory and immunosuppressive drugs based on their radical scavenging activities.

ISSN 

0041-008X

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


There are no files associated with this item.
qrcode

FusionCharts.
DSpace Software Coptright(c) 2010 MIT and Hewleft-Packard  /  KRIBB-REPOSITORY ( Email:jakim@kribb.re.kr)