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Protective Effects of Korean Red Ginseng against Alcohol-induced Hepatosteatosis
Sun Ju Kim(김선주),Sung Hwan Ki(기성환),Sangkyu Lee(이상규) 한국생명과학회 2015 생명과학회지 Vol.25 No.3
알코올에 의한 지방간(지방변성증)은 에탄올 대사에 의해 감소되는 당량의 과도한 발생에 의해 유발된다. 일반적으로 만성적인 에탄올 투여는 간 지질의 합성을 증가시키는 sterol regulatory element-binding protein 1c (SREBP-1c)를 조절함으로써 지방변성증을 유발시킨다. SPEBP-1c에서 에탄올의 영향은 간에서의 지방대사를 조절하는 NAD<SUP>+</SUP> 의존적 단백질 탈아세틸화효소인 mammalian sirtuin-1 (SIRT-1)에 의해 조정된다. 홍삼은 항당뇨와 항비만 효과를 위해 아시아에서 광범위하게 사용되는 한약재이다. 홍삼의 약리학적 치료학적인 효과는 진세노사이드와 같은 생물활성 성분에 의해 주로 일어난다. 따라서 우리는 마우스 간세포주인 AML-12 세포에서 SREBP-1과 SIRT-1에대한 한국홍삼 추출물의 조절효과를 평가하였다. 알코올과 홍삼추출물(0-1,000 μg/ml)을 AML-12 세포주에 처리하고, 지방소립을 Oil red O 염색법으로 확인하고, western blots을 사용해 SIRT-1과 SREBP-1의 발현을 확인하였다. 에탄올을 처리한 세포에서 홍삼추출물은 SIRT-1과 SREBP-1c의 발현을 회복시켰다. 또한 에탄올이 처리된 세포에서 홍삼추출물과 진세노사이드 Rb2와 Rd가 SREBP-1을 유의적으로 감소시키는 것으로 확인 되었다. 결과적으로 홍삼과 활성 진세노사이드 성분인 Rb2와 Rd가 SIRT-1과 간 지질대사를 변화시키는 SREBP-1c의 아세틸화의 조절을 통해 알코올에 의한 간지방변성을 억제하는 것을 확인하였다. Alcohol-induced fatty liver (steatosis) results from excessive generation of reducing equivalents by ethanol metabolism. Generally, chronic ethanol treatment causes hepatosteatosis by regulating sterol regulatory element-binding protein 1c (SREBP-1c), which increases the synthesis of hepatic lipids. The effect of ethanol on SREBP-1c is mediated through mammalian sirtuin-1 (SIRT-1), a NAD<SUP>+</SUP>-dependent protein deacetylase that regulates hepatic lipid metabolism. Ginseng is a widely used herbal medicine that is used in Asia for its anti-diabetes and anti-obesity effects. The pharmacological and therapeutic effects of ginseng are primarily produced by bioactive constituents known as ginsenosides. Here, we examined the regulatory effects of Korean red ginseng (KRG) extracts on SREBP-1c and SIRT-1 on lipid homeostasis in AML-12 mouse hepatocytes. AML-12 cells were treated with ethanol and/or KRG extracts (0 - 1,000 μg/ml). Lipid droplets were assayed using Oil red O staining, and western blotting was used to measure SIRT-1 and SREBP-1 expression. Treatment with KRG extracts restored SIRT-1 expression and reduced SREBP-1c expression in ethanol-treated cells. We also showed that KRG extract and ginsenosides Rb2 and Rd significantly decreased SREBP-1 acetylation in ethanol-treated cells. These results show that treatment with KRG extract and its active ginsenoside constituents Rb2 and Rd protected against alcohol-related hepatosteatosis via regulation of SIRT-1 and downstream acetylation of SREBP-1c, which altered hepatic lipid metabolism.
김지연(Ji Yeon Kim),최민정(Min Joung Choi),기성환(Sung Hwan Ki),이원재(Wonjae Lee) 대한약학회 2022 약학회지 Vol.66 No.4
Plasma-derived medicinal products (PDMPs) are pharmaceuticals prepared using proteins in plasma, a liquid component of blood. Regarding the use of human blood as a raw material in PDMP manufacturing, it has unique characteristics unlike other pharmaceuticals (for example, limitations of scientific identification, finiteness of blood, and risk of infection through disease pathogens, such as the human immunodeficiency virus, hepatitis B virus, and hepatitis C virus in the blood). The safety management policy of PDMPs in Korea started with the enactment of the Blood Management Act in 1970. After that, the current safety management system was established through product approval management according to the Pharmaceutical Affairs Act in 2006, higher standards of safety management for imported source plasma in 2009, and expansion of management standards for source plasma in 2012. The safety management of PDMPs involves several important policies. Public management has been carried out by the Korean Red Cross and national government, and domestic plasma should be used first, while imported plasma may be used only if there is not enough. Additionally, to ensure blood products safety, plasma testing, inventory hold, and plasma master file reporting obligations are being implemented. In addition, it is managed as a subject of national lot release, which should also be quality-confirmed by the country. Because the supply of domestic source plasma, which is the raw material of PDMPs, has shown a decreasing trend in recent years, continuous monitoring and preparation is required. In this study, we describe the history of safety management policies, including the definition and classification of PDMPs, product status, usage status of source plasma, and the related policy guidelines and characteristics.
The selective induction of leelamine on hepatic CYP 2B activity in ICR mice
Ju Hee Sim(심주희),Woongsik Nam(남웅식),Hungchan O(오흥찬),Suyoun Lee(이수연),Doohyun Lee(이두현),Kwang-Hyeon Liu(류광현),Taeho Lee(이태호),Jae Yun Han(한재윤),Sung Hwan Ki(기성환),Tae Cheon Jeong(정태천),Sangkyu Lee(이상규) 환경독성보건학회 2014 한국독성학회 심포지움 및 학술발표회 Vol.2014 No.5