Therapeutic effects of anthocyanin-rich Hibiscus sabdariffa L. extract on body mass index, lipid profile and fatty liver in obese-hypercholesterolaemic rat model

Background: Hibiscus sabdariffa L. or Roselle, is one of the most common flower plants cultivated worldwide. Traditionally, it is claimed to reduce weight and cholesterol level. The aim of this study was to evaluate the effects of anthocyanin-rich Roselle aqueous extract on the physical, biochemical and histological changes in obese-hypercholesterolaemic rat model.Methods: Thirty Sprague-Dawley male rats were divided into five groups (n=6 per group). Group 1 is normal control (NC) rat that was fed with normal diet. The remaining rats (Group 2-5) were fed with commercial high-fat diet (HFD) for 6 weeks to induce obese-hypercholesterolaemic (OH) rat. After induction, the OH rats were divided into 4 groups: OH-Untreated group, OH-ARTE; OH treated with 300 mg/kg Roselle aqueous (anthocyanin-rich) and 1% trifluoroacetic acid extract (ARTE), OH-Orlistat; OH treated with 37 mg/kg orlistat and OH-Atorvastatin; OH treated with 10 mg/kg atorvastatin. After the 3 weeks intervention period, all rats were sacrificed. Body mass index, lipid profile and liver enzymes were evaluated. The liver section was subjected to hematoxylin and eosin staining for histopathological evaluation.Results: This study showed that 3 weeks administration of ARTE significantly reduced BMI, improved levels of lipid profile and liver enzymes, and histopathological changes of liver when compared to OH-untreated rats. The results were also comparable to the standard drugs.Conclusions: This study suggested that Roselle extract constitutes an effective and safe alternate treatment for obesity and hyperlipidaemia

ジュヨウタイ ノ カリュウ ニ オケル Cdc42 Src オヨビ アダプター タンパクシツグン ニ イゾンスル F-BAR ドメイン タンパクシツ GAS7 ブンシ シュウゴウ キコウノ カイセキ

博第1772号博士(バイオサイエンス)奈良先端科学技術大学院大

Phagocytosis is mediated by two-dimensional assemblies of the F-BAR protein GAS7

Phagocytosis is a cellular process for internalization of micron-sized large particles including pathogens. The Bin-Amphiphysin-Rvs167 (BAR) domain proteins, including the FCH-BAR (F-BAR) domain proteins, impose specific morphologies on lipid membranes. Most BAR domain proteins are thought to form membrane invaginations or protrusions by assembling into helical submicron-diameter filaments, such as on clathrin-coated pits, caveolae, and filopodia. However, the mechanism by which BAR domain proteins assemble into micron-scale phagocytic cups was unclear. Here, we show that the two-dimensional sheet-like assembly of Growth Arrest-Specific 7 (GAS7) plays a critical role in phagocytic cup formation in macrophages. GAS7 has the F-BAR domain that possesses unique hydrophilic loops for two-dimensional sheet formation on flat membranes. Super-resolution microscopy reveals the similar assemblies of GAS7 on phagocytic cups and liposomes. The mutations of the loops abolishes both the membrane localization of GAS7 and phagocytosis. Thus, the sheet-like assembly of GAS7 plays a significant role in phagocytosis