Paeonol Inhibits Lipopolysaccharide-Induced HMGB1 Translocation from the Nucleus to the Cytoplasm in RAW264.7 Cells.
Transport of high-mobility group box 1 (HMGB1), a highly conserved non-histone DNA-binding protein, from the nucleus to the cytoplasm is induced by lipopolysaccharide (LPS). Secretion of HMGB1 appears to be a key lethal factor in sepsis, so it is considered to be a therapeutic target. Previous studies have suggested that paeonol (2'-hydroxy-4'-methoxyacetophenone), an active compound of Paeonia lactiflora Pallas, exerts anti-inflammatory effects. However, the effect of paeonol on HMGB1 is unknown. Here, we investigated the effect of paeonol on the expression, location, and secretion of HMGB1 in LPS-induced murine RAW264.7 cells. ELISA revealed HMGB1 supernatant concentrations of 615 ± 30 ng/mL in the LPS group and 600 ± 45, 560 ± 42, and 452 ± 38 ng/mL in cells treated with 0.2, 0.6, or 1 mM paeonol, respectively, suggesting that paeonol inhibits HMGB1 secretion induced by LPS. Immunohistochemistry and Western blotting revealed that paeonol decreased cytoplasmic HMGB1 and increased nuclear HMGB1. Chromatin immunoprecipitation microarrays suggested that HMGB1 relocation to the nucleus induced by paeonol might depress the action of Janus kinase/signal transducers and activators of transcription, chemokine, and mitogen-activated protein kinase pro-inflammatory signaling pathways. Paeonol was also found to inhibit tumor necrosis factor-α promoter activity in a dose-dependent manner. These results indicate that paeonol has the potential to be developed as a novel HMGB1-targeting therapeutic drug for the treatment of inflammatory diseases.
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.|Guangzhou Orthopedic Trauma Hospital, No. 449 Dongfeng Middle Road, Guangzhou, 510045, China.
Hang
H
Lei
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Quan
Q
Wen
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China. lihui@gzucm.edu.cn.
Hui
H
Li
Department of Internal Medicine, Affiliated Shenzhen Hospital to Guangzhou University of Chinese Medicine, No. 2 Fuhua Road, 51803, Shenzhen, China.
Shaohui
S
Du
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Jing-Jing
JJ
Wu
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Jing
J
Chen
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Haiyuan
H
Huang
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Dongfeng
D
Chen
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Yiwei
Y
Li
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Saixia
S
Zhang
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Jianhong
J
Zhou
Laboratory of Molecular Medicine, School of Basic Medicine, Guangzhou University of Chinese Medicine, 232 Waihuandong Road, Guangzhou University Town, Guangzhou, 510006, China.
Rudong
R
Deng
Department of Nutrition Sciences, University of Alabama at Birmingham, 1675 University Blvd, Webb 435, Birmingham, AL, 35242, USA.
Qinglin
Q
Yang
D000098:Acetophenones / Q000494:pharmacology*; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology; D002467:Cell Nucleus / Q000378:metabolism; D003593:Cytoplasm / Q000378:metabolism; D024243:HMGB1 Protein / Q000187:drug effects / Q000378:metabolism*; D008070:Lipopolysaccharides / Q000494:pharmacology; D051379:Mice; D011401:Promoter Regions, Genetic / Q000187:drug effects; D021381:Protein Transport / Q000187:drug effects*; D000067996:RAW 264.7 Cells; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics
D000098:Acetophenones; D000893:Anti-Inflammatory Agents; D024243:HMGB1 Protein; D008070:Lipopolysaccharides; D014409:Tumor Necrosis Factor-alpha; C013638:paeonol
high-mobility group box 1; inflammatory factor; lipopolysaccharide; paeonol; sepsis