Studies on Selective Modulators and Antianorexigenic Agents in Korean Red Ginseng

고려홍삼에 함유된 선택조절제 및 항식욕감퇴 인자에 관한 연구

  • Takaku Takeshi (Central Research Laboratory, School of Medicine, Ehime University) ;
  • Kameda Kenji (Central Research Laboratory, School of Medicine, Ehime University) ;
  • Matsuura Yukinaga (Department of Medical Biochemistry, School of Medicine, Ehime University) ;
  • Sekiya Keizo (Department of Medical Biochemistry, School of Medicine, Ehime University) ;
  • Okai Hideo (Department of Fermentation Technology. Faculty of Engineering, Hiroshima University) ;
  • Okuda Hiromichi (Department of Medical Biochemistry, School of Medicine, Ehime University)
  • Published : 1988.08.01

Abstract

Recently, we isolated a toxic substance named 'toxohormone-L' from ascites fluid of patients with various malignant tumors. The toxohormone-L stimulated lipolysis in rat adipocytes and induced anorexia in rats. Both the lipolytic and the anorexigenic actions of toxohormone-L were found to be inhibited by ginsenoside $Rb_2$ in Korean red ginseng. Isolated rat adipocytes are well known to possess opposite pathways of lipid metabolism: lipolysis and lipogenesis. Both of the metabolism respond to various biologically active substances such as epinephrine, ACTH and insulin. Epinephrine and ACTH stimulate lipolysis and insulin accelerates lipogenesis. Recently. Korean red ginseng powder was found to contain adenosine and an acidic substance which inhibited epinephrine-induced lipolysis and stimulated insulin-mediated lipogenesis from added glucose. The chemical structure of this acidic substance is determined to be pyro-glutamic acid (Pyro-Glu), Pyro-Glu exhibits selective modulations toward the opposite metabolic pathways in rat adipocyte; It inhibits the lipolysis but stimulates the lipogenesis. We call these substances (adenosine, Pyro-Glu) 'selective modulators' or 'insulin-like substances'. Based on these results, physiological significances of these substances in Korean red ginseng were discussed.

에피네프린은 지방분해를 촉진하고 인슈린은 지방생성을 촉진한다는 것은 잘 알려져 있다. 최근에 한국홍삼분말 중에는 에피네프린으로 유도된 지방분해를 억제하며 인슐린이 매개하는 당으로부터의 지방합성을 촉진하는 아데노신과 산성펩티드 성분이 존재함이 밝혀졌다. 산성펩티드의 화학구조는 Glu-Glu-Glu-Glu-Glu-Glu-Glucose인 것으로 밝혀졌다. 한국홍삼으로 부터 추출된 이러한 물질들은 흰쥐 지방세포에서 반대의 대사경로를 통하여 지방분해를 억제하는 반면 지방합성을 촉진하기도 하는 선택적 조절작용을 나타낸다. 최근에 우리는 여러가지 악성종양을 가진 환자의 복수액으로부터 toxohormone-L로 명명된 독성물질을 분리하였다. Toxohormone-L은 흰쥐 지방세포에서 지방분해를 촉진하고 흰쥐에서 식욕감퇴를 유발했다. Toxohormone-L의 이러한 작용은 한국홍삼에서 분리된 진세노사이드 $Rb_2$에 의해서 억제됨이 발견되었다. 한국홍삼에서 발견된 이러한 물질의 생리학적 유의성을 언급하고자 한다.

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