Opuntia ficus-indica seed attenuates hepatic steatosis and promotes M2 macrophage polarization in high-fat diet?fed mice

Opuntia ficus-indica seed attenuates hepatic steatosis and promotes M2 macrophage polarization in high-fat diet?fed mice
Jung-Woo KangJun-Kyu ShinEun-Ji KohHyojeong Ryu김형자Sun-Mee Lee
Opuntia ficus-indica seed; Nonalcoholic steatohepatitis; High-fat diet-fed mice; Hepatoprotective effects
Issue Date
Nutrition research
VOL 36, NO 4, 369-379
Opuntia ficus-indica (L.) is a popular edible plant that possesses considerable nutritional value and exhibits diverse biological actions including anti-inflammatory and antidiabetic activities. In this study, we hypothesized that DWJ504, an extract of O ficus-indica seed, would ameliorate hepatic steatosis and inflammation by regulating hepatic de novo lipogenesis and macrophage polarization against experimental nonalcoholic steatohepatitis. Mice were fed a normal diet or a high-fat diet (HFD) for 10 weeks. DWJ504 (250, 500, and 1000 mg/kg) or vehicle (0.5% carboxymethyl cellulose) were orally administered for the last 4 weeks of the 10-week HFD feeding period. DWJ504 treatment remarkably attenuated HFD-induced increases in hepatic lipid content and hepatocellular damage. DWJ504 attenuated increases in sterol regulatory element-binding protein 1 and carbohydrate-responsive element-binding protein expression and a decrease in carnitine palmitoyltransferase 1A. Although DWJ504 augmented peroxisome proliferator–activated receptor α protein expression, it attenuated peroxisome proliferator–activated receptor γ expression. Moreover, DWJ504 promoted hepatic M2 macrophage polarization as indicated by attenuation of the M1 marker genes and enhancement of M2 marker genes. Finally, DWJ504 attenuated expression of toll-like receptor 4, nuclear factor κB, tumor necrosis factor α, interleukin 6, TIR-domain-containing adapter–inducing interferon β, and interferon β levels. Our results demonstrate that DWJ504 prevented intrahepatic lipid accumulation, induced M2 macrophage polarization, and suppressed the toll-like receptor 4–mediated inflammatory signaling pathway. Thus, DWJ504 has therapeutic potential in the prevention of nonalcoholic fatty liver disease.
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