title: Ellagic acid modulates LPS-induced maturation of dendritic cells through the regulation of JNK activity.
abstract: Ellagic acid (EA) is a well- known phytochemical that modulates various cellular processes. It is present in a variety of foods, including grapes, strawberries, and nuts. However, the influence of EA on immunological responses is not well defined. Here, we investigated the effects of EA on the lipopolysaccharide (LPS)-induced bone marrow-derived dendritic cells (BMDCs). EA was not cytotoxic to DCs. EA suppressed LPS-induced expression of costimulatory molecules (CD80 and CD86), but it did not suppress the expression of major histocompatibility complex (MHC) class I and MHC class II in BMDCs. In particular, EA blocked LPS-induced c-Jun N-terminal kinase (JNK) activation. LPS-mediated expression of proinflammatory cytokines (IL-12 and IFN-γ) was diminished by EA. We also confirmed that levels of IL-12 and IFN-γ were not influenced by EA in the presence of a JNK inhibitor. Taken together, these data demonstrate that EA regulates the immune response through the modulation of LPS-induced DC maturation.
authors: 1 Department of Infectious Diseases Research, Armed Forces Medical Research Institute , Daejeon, South Korea .
authors: Kyung Tae
authors: KT
authors: Noh
authors: Gil Sun
authors: GS
authors: Cha
authors: Hyung Chul
authors: HC
authors: Kim
authors: Jae Hong
authors: JH
authors: Lee
authors: Soon Cheol
authors: SC
authors: Ahn
authors: Dae Kyong
authors: DK
authors: Kim
authors: Yeong-Min
authors: YM
authors: Park
mesh_terms: D000818:Animals; D018122:B7-1 Antigen; D051940:B7-2 Antigen; D001854:Bone Marrow Cells; D002454:Cell Differentiation / Q000187:drug effects*; D002478:Cells, Cultured; D003713:Dendritic Cells / Q000187:drug effects* / Q000276:immunology / Q000378:metabolism; D004610:Ellagic Acid / Q000494:pharmacology*; D005638:Fruit / Q000737:chemistry; D007371:Interferon-gamma / Q000378:metabolism; D018664:Interleukin-12 / Q000378:metabolism; D048031:JNK Mitogen-Activated Protein Kinases / Q000378:metabolism; D008070:Lipopolysaccharides; D008297:Male; D008810:Mice, Inbred C57BL; D010936:Plant Extracts / Q000494:pharmacology*
chemical_list: D018122:B7-1 Antigen; D051940:B7-2 Antigen; D008070:Lipopolysaccharides; D010936:Plant Extracts; D018664:Interleukin-12; D004610:Ellagic Acid; D007371:Interferon-gamma; D048031:JNK Mitogen-Activated Protein Kinases
keywords: bone marrow-derived dendritic cell; c-Jun N-terminal kinase; ellagic acid; lipopolysaccharide