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감마선조사 생약재 (어성초, 구기자)의 안전성에 관한 유전독학성적 평가
조성기,유영법,오헌,곽연길,변명우,Jo, Sung-Kee,Yu, Young-Beob,Oh, Heon,Kwak, Youn-Gil,Byun, Myung-Woo 한국식품저장유통학회 2000 한국식품저장유통학회지 Vol.7 No.1
These experiments were performed to investigate the safety of two herbs-Houttuynia cordata Thunberg and Lycium chinese Miller-irradiated with gamma-rays in respect of genotoxicity. Water extracts from the 10 kGy gamma-irradiated herbs were examined in two short -term in vitro tests ; (1) Salmonella typhimurium reversion assay (Ames test) in strain TA 98 and Ta100 and (2) Micronuclues test on clutured Chinese hamster ovary(CHO) cells. No mutagenicity was detected in the two assays with or without metabolic activation . From these results , the safety of the herbs irradiated with gamma-rays at practical doses could be revealed in further tests of genotoxicity in vivo, chronic and reproductive toxicity.
비스페놀A 유도 간 손상 마우스에서 해삼(Stichopus japonicas) 추출물 및 가수분해물의 간 기능 개선 효과
김세정,김진성,조윤호,박비오,유대석,김두호,김민정,곽연길 (사)한국해양바이오학회 2022 한국해양바이오학회지 Vol.14 No.2
This study aimed to investigate the hepatoprotective activities of the sea cucumber products, including extracts and hydrolysates, in vitro and in vivo. Dried sea cucumber, produced on the western coast of Korea, was boiled in water or 70% ethanol at 85°C or 100°C for 18 or 24 h, respectively, to extract bioactive compounds. The enzymatic hydrolysates were prepared by reacting the dried sea cucumber with pepsin or neutral protease (PNL) under optimal enzyme conditions. The anti-inflammatory effect of the samples was investigated using RAW 264.7 cells treated with lipopolysaccharide (LPS). The amount of nitric oxide (NO) was produced from the cells treated with LPS and each sample was compared. Therefore, the pepsin hydrolysate treatment decreased NO production compared to LPS sole treatment. Furthermore, the effects of the samples on cell injury in the hepatic cell line and bisphenolA-induced hepatic injury mouse model were investigated. The water extracts and the pepsin hydrolysates of sea cucumber significantly inhibited cell injury generated in the hepatocytes without cytotoxicity (p < 0.05), whereas the ethanol extracts were cytotoxic. However, these results indicate that the extracts and the enzymatic hydrolysates derived from sea cucumber can be used as beneficial materials for inhibiting liver damage.
Jing-Hui Feng,정전섭,황승환,이수경,이상윤,곽연길,김두호,송추연,김민정,서홍원,김성찬,임순성 한국통합생물학회 2022 Animal cells and systems Vol.26 No.4
Pain and inflammation typically manifest in patients with arthritis. It is now widely known that Agrimonia pilosa Ledeb (AP) and Salvia miltiorrhiza Bunge (SM) exert anti-inflammatory and antinociceptive effects. We have previously reported that the mixture extract (ME) from AP and SM produces antinociceptive and anti-inflammatory effects in gout arthritis and monoiodoacetate (MIA)-induced arthritis models. In the present study, we assessed the antinociceptive and anti-inflammatory effects on the collagen-induced arthritis (CIA) model. The antinociceptive effects in mice were measured using the von Frey test. ME administered once or for one week (once per day) once, and one-week reduced the pain in a dose-dependent manner (from 50 to 100 mg/kg) in the CIA-induced osteoarthritis (OA) model. ME treatment also reduced tumor necrosis factor (TNF)-α and C-reactive protein (CRP) levels in plasma and ankle tissues. Furthermore, COX-1, COX-2, NF-κB, TNF-α, and IL-6 expressions were attenuated after ME treatment. In most experiments, the antinociceptive and anti-inflammatory effects induced by ME treatment were almost equal to or slightly better than those induced by Perna canaliculus (PC) treatment, which was used as a positive control. Our results suggest that ME possesses antinociceptive and anti-inflammatory effects, indicating its potential as a therapeutic agent for arthritis treatment.
유대영,정효영,남성민,김종휘,최정훈,곽연길,유미영,이상희,윤여성,황인구 한국식품영양과학회 2015 Journal of medicinal food Vol.18 No.6
As a medicinal plant, the roots of Valeriana officinalis have been used as a sedative and tranquilizer. In the present study, we evaluated the neuroprotective effects of valerian root extracts (VE) on the hippocampal CA1 region of gerbils after 5 min of transient cerebral ischemia. Gerbils were administered VE orally once a day for 3 weeks, subjected to ischemia/reperfusion injury, and continued on VE for 3 weeks. The administration of 100 mg/kg VE (VE100 group) significantly reduced the ischemia-induced spontaneous motor hyperactivity 1 day after ischemia/reperfusion. Four days after ischemia/reperfusion, animals treated with VE showed abundant cresyl violet-positive neurons in the hippocampal CA1 region when compared to the vehicle or 25 mg/kg VE-treated groups. In addition, the VE treatment markedly decreased microglial activation in the hippocampal CA1 region 4 days after ischemia. Compared to the other groups, the VE100 group showed the lowest level of lipid peroxidation during the first 24 h after ischemia/reperfusion. In summary, the findings in this study suggest that pretreatment with VE has protective effects against ischemic injury in the hippocampal pyramidal neurons by decreasing microglial activation and lipid peroxidation
하영득(Young-Duck Ha),이삼빈(Sam-Pin Lee),곽연길(Youn-Gil Kwak) 한국식품영양과학회 1998 한국식품영양과학회지 Vol.27 No.4
마 점질물의 기능성을 조사하기 위하여 마 점질물을 isopropanol 농도차에 의해서 두 개의 fraction을 얻어 각각의 중금속 제거효과와 ACE 저해효과를 알아보았다. 점질물 fraction 1과 fraction 2는 Co, Cr, Cu 이온에 대하여 약 79% 이상의 우수한 흡착력을 보였고, 특히 pH 6.3에서 Cu 제거능이 95.63%로 가장 높았으며, 전체적으로는 Cr에 대한 제거능이 가장 우수한 것으로 나타났다. 그러나 pH의 상승이나 감소에 따른 중금속 제거능의 비례적 관계는 찾아 볼 수 없었다. 점질물 fraction 1과 fraction 2의 ACE 저해율 실험을 통하여 두 점질물 fraction 모두 ACE 저해 효과가 있음을 알 수 있었으며, 점질물 fraction 2의 저해율이 더 우수했다. 점질물 fraction 1과 fraction 2의 IC_(50)값은 8.99㎍/㎍ 7.1㎍/㎕값으로 측정되었다. Functional properties of yam mucilage were investigated by physicochemical analysis. Yam mucilage was extracted from the root of yam and then separated into two fractions by its selective aggregation with isopropanol concentration. Each mucilge fraction showed the excellent binding properties with heavy metal ions Co, Cr and Cu. Cr showed the higher affinity with mucilage than Co and Cu at pH 6.3. In ACE inhibition, IC_(50) values of mucilage fraction 1 and 2 showed 8.99㎍/㎕ and 7.1㎍/㎕, respectively.
잔티젠(Xanthigen)에 의한 고지방식이로 유도된 비만 개선 효과
최경미(Kyeong-Mi Choi),이윤선(Youn-Sun Lee),김원균(Wonkyun Kim),최영현(Yung-Hyun Choi),곽연길(Youn-Gil Kwak),정재철(Jae-Chul Jung),이정래(Jeongrai Lee),유환수(Hwan-Soo Yoo) 한국생명과학회 2012 생명과학회지 Vol.22 No.12
비만은 대사성 질환의 주요 위험 인자이다. 최근, 천연물질들의 비만 개선효과에 관심이 집중되고 있다. 잔티젠은 체중감소와 지질 대사 개선 효과가 있는 것으로 알려진 미역에서 유래한 fucoxanthin과 석류씨 오일에서 유래한 punicic acid로 구성된 복합 추출물이다. 본 연구에서, 우리는 C57BL/6N 마우스를 이용하여 잔티젠이 고지방식이로 유도된 비만을 개선시킬 수 있는지 조사하였다. 마우스는 각각 정상식이 대조군, 고지방식이 대조군, 고지방식이 + 1% 잔티젠군, 고지방식이 + 1% 녹차 추출물 양성대조군으로 나누어 11주간 사육하였다. 잔티젠 투여군은 고지방식이군과 비교하여 식이효율과 체중이 유의적으로 감소하였다. 체중 변화와 유사하게, 잔티젠은 복부부고환 지방조직과 후복막 지방조직 및 간의 무게를 고지방식이군 대비 뚜렷하게 감소시켰고, 혈청 LDL-콜레스테롤 함량 또한 유의적으로 감소시켰다. 이러한 결과들은 잔티젠의 탁월한 항비만 효과를 갖는 건강기능식품 소재로서의 개발 가능성을 제시한다. Obesity is a risk factor for numerous metabolic diseases. Recently, naturally occurring compounds that may improve obesity have received increasing attention. Xanthigen is a mixture of fucoxanthin and punicic acid derived from brown seaweed and pomegranate seed, respectively, which have been traditionally used for lipid-lowering effects in humans. In this study, we investigated whether Xanthigen attenuates high-fat diet-induced obesity in C57BL/6N mice. The mice were fed on a normal diet (ND), high-fat diet (HFD), HFD plus 1% Xanthigen or HFD plus 1% green tea extract (GTE) for 11 weeks. Food efficiency ratio (FER) and body weight were significantly reduced in mice fed HFD plus Xanthigen compared to HFD-fed mice. Consistent with the results in body weight change, Xanthigen also significantly decreased the weights of epididymal adipose tissue, retroperitoneal adipose tissue, and liver in HFD plus 1% Xanthigen-fed mice. The serum level of low-density ipoprotein (LDL)-cholesterol was significantly decreased in HFD plus Xanthigen-fed mice compared to HFD-fed mice. These results suggest that Xanthigen may be useful in the development of a functional health food for anti-obesity.