文献詳細
文献概要
今月の主題 脂肪細胞 各論
脂肪細胞とリポ蛋白代謝―アディポネクチンを中心に
著者: 山下静也1
所属機関: 1大阪大学大学院医学系研究科循環器内科学
ページ範囲:P.567 - P.573
文献購入ページに移動脂肪細胞はVLDL受容体,SR-BI,スカベンジャー受容体(SRA,CD36,LOX-1など)のリポ蛋白受容体を有する一方で,多くの生物活性物質,アディポサイトカインを分泌する.メタボリックシンドロームの患者では内臓脂肪蓄積に伴って低アディポネクチン血症が認められるが,インスリン抵抗性,脂質異常症,高血圧などの危険因子を集積させ,動脈硬化性疾患を発症させる.血清アディポネクチン値とHDL-C値は正相関する.アディポネクチンは肝臓でのHDL新生を促進するのみならず,マクロファージでのコレステロール引き抜きを促進し,コレステロール逆転送系を活性化させる.メタボリックシンドロームにおける低アディポネクチン血症は,肝臓でのHDL新生の減少,マクロファージでのコレステロール引き抜きの低下により,低HDL-C血症を引き起こす.また,血清アディポネクチン値はTG値と逆相関し,アディポネクチンは肝臓でのVLDL合成・分泌を抑制する.本稿では脂肪細胞とリポ蛋白代謝,さらには脂肪細胞から分泌されるアディポネクチンとリポ蛋白との関連について紹介する.
参考文献
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