• Nutrition Research and Practice
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• 제12권2호
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• pp.118-128
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• 2018

BACKGROUND/OBJECTIVES: Glutathione s-transferase (GST) is involved in the formation of a multigene family comprising phase II detoxification enzymes, involved in the detoxification of reactive oxygen species. This study evaluated whether daily supplementation with kale juice could modulate levels of plasma antioxidant vitamins and oxidative stress-related parameters. We further examined whether this modulation was affected by combined GSTM1 and T1 polymorphisms. SUBJECTS/METHODS: Totally, 84 subclinical hypertensive patients having systolic blood pressure (BP) over 130 mmHg or diastolic BP over 85 mmHg, received 300 mL of kale juice daily for 6 weeks. Blood samples were drawn before start of study and after completion of 6 weeks. RESULTS: After supplementation, we observed significant decrease in DNA damage and increase in erythrocyte catalase activity in all genotypes. Plasma level of vitamin C was significantly increased in the wild/null and double null genotypes. The plasma levels of ${\beta}-carotene$, erythrocyte glutathione peroxidase activity, and nitric oxide were increased only in the wild/null genotype after kale juice supplementation. CONCLUSIONS: The effect of kale juice was significantly greater in the GSTM1 null genotype and wild/null genotype groups, suggesting possibility of personalized nutritional prescriptions based on personal genetics.

• Archives of Pharmacal Research
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• 제22권2호
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• pp.99-107
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• 1999

A series of organosulfur compounds were synthesized with the aim of developing chemopreventive compounds active against hepatotoxicity and chemical carcinogesis. 2-(Allylthio) prazine (2-AP) was effective in inhibiting cytochrome P450 2E1-mediated catalytic activities and protein expression, and in inducing microsomal epoxide hydrolase and major glutathione S-transferases. 2-AP reduced the hepatotoxicity caused by toxicant sand elevated cellular GSH content. Development of skin tumors, pulmonary adenoma and aberrant crypt foci in colon by various chemical carcinogens was inhibited by 2-AP pretreatment. Anticarcinogenic effects of 2-AP at the stage of initiation of tumors were also observed in the aflatoxin B1 ($AFB_1$)-induced three-step medium-term hepatocarcinogenesis model. Reduction of $AFB_1$-DNA adduct by 2-AP appeared to result from the decreased formation of $AFB_1$-8,9-epoxide via suppression of cytochrome P450, while induction of GST 2-AP increases the excretion of glutathione-conjugated $AFB_1$ . 2-AP was a radioprotective agent effective against the lethal dose of total body irradiation and reduced radiation-induced injury in association with the elevation of detoxifying gene expression. 2-AP produces reactive oxygen species in vivo, which is not mediated with the thiol-dependent production of oxidants and that NF-KB activation is not involved in the induction of the detoxifying enzymes. the mechanism of chemoprotection by 2-AP may involve inhibition of the P450-mediated metabolic activation of chemical carcinogens and enhancement of electrophilic detoxification through induction of phase II detoxification enzymes which would facilitate the clearance of activated metabolites through conjugation reaction.

• 융합정보논문지
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• 제10권12호
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• pp.208-215
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• 2020

본 연구는 SUKI를 활용하여 두피의 중금속 감소에 대해 미치는 영향에 대해 알아보았다. 연구대상자는 총 26명이었으며 실험군과 대조군 각각 13명이었다. SUKI 도구를 활용한 두피 중금속 배출에 대한 중재를 8주간 주 2회씩 실시하였고, 결과는 다음과 같다. 총 각각 8 종목의 실험군과 대조군의 비교에서 실험군에서 유의한 차이가 있었다. 실험군의 중금속인 Hg, Pb, Al, Cd, As, Ba, Ur, Cs 중에서 6가지 항목의 Hg, Al, Cd, As, Ba, Ur과 같은 중금속들에서 통계적으로 유의한 감소(p<.05)를 보여주었으며, Pb, Cs 는 유의하지 않았다. 그리고 해당 유해중금속 중에서 Al, Ba, Hg가 가장 큰 차이의 감소율을 나타냈다. 따라서 SUKI 도구의 중재가 일부 중금속 배출에 영향을 줄 수 있다는 것을 시사한다(p<.05). 결론적으로 향후 지속적인 연구를 통해 두피의 중금속 배출을 위한 기초자료로 활용될 수 있을 것으로 사료된다.

• 대한본초학회지
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• 제24권2호
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• pp.57-65
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• 2009

Objectives : This study was aimed to developing Korean herbalogy of the plants belonging to Aspidiaceae in Korea. Methods : The herbological books and papers published at home and abroad were researched. The total list of Aspidiaceae was made and Medicinal plants in Aspidiaceae was classified. The medicinal properties, action and applications of medicinal plants were investigated. Results : 1. There are totaled to 17 genera and 130 species in Aspidiaceae in Korea and among them medicinal plants are 11 genera, 31 species, some 24% in total. 2. Athyrium genus is main kind enough that it has 32 species among 130 species in Aspidiaceae, and medicinal plants of Dryopteris is 4 species. 3. The rhizome is the main medicinal parts if medicinal plants in the Aspidiaceae, which is used in 24 species. 4. According to nature and flavor of medicinal plants in the Aspidiaceae, they were classified into cool 15 and cold 8 species ; bitter taste 19, and little bitter taste 15 in the order. 5. According to meridian propism of medicinal plants in the Aspidiaceae, they were classified into liver meridian 5 species, stomach meridian 3 species. 6. According to the properties and principal curative action, they were classified into drugs for clearing away heat 25 species, drugs for detoxification 22 species, drugs for promoting diuresis 16 species in the order. 7. The number of toxic species in the Aspidiaceae was examined to be 5 species. Conclusions : There are totaled to 17 genera and 130 species in Aspidiaceae in Korea and among them medicinal plants are 11 genera, 31 species, some 24% in total. They were classified into drugs for clearing away heat, drugs for detoxification, drugs for promoting diuresisr.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2023년도 임시총회 및 춘계학술대회
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• pp.12-12
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• 2023

Plant biomass, or lignocellulose, is one of the most abundant natural resources on earth. Lignocellulosic biomass, such as agricultural and forestry residue, serves as a renewable feedstock for microbial cell factories due to its low price and abundant availability. However, the recalcitrance of lignocellulosic biomass requires a pretreatment process prior to microbial fermentation, from which fermentable sugars including xylose and glucose are generated along with various inhibitory compounds. The presence of furan derivatives, such as 5-hydroxymethyl-2-furaldehyde and 2-furaldehyde (furfural), hampers the microbial conversion of lignocellulosic biomass into value-added commodities. In this study, furfural tolerance was improved by investigating the detoxification mechanism in non-model yeast. The genes encoding aldehyde dehydrogenases were overexpressed to enhance furfural tolerance and resulted in improving cell growth and lipid production that can be converted into biofuel. Taken together, this approach contributes to the understanding of the reducing toxicity mechanism of furfural by the aldehyde dehydrogenases and provides a promising strategy that the use of microorganism as an industrial workhorse to treat efficiently lignocellulosic biomass as sustainable plant derivatives.

• 자원환경지질
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• 제49권2호
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• pp.77-88
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• 2016

백석면[Chrysotile, $Mg_3Si_2O_5(OH)_4$]은 사문석군 광물에 속하는 1:1 층상규산염광물로 섬유상의 형태와 구조적 특성으로 인해 다양한 이용과 연구가 진행되었으나, 근래에는 1급 발암물질로 선정되면서 백석면의 분해에 따른 본질적인 무해화를 위한 연구의 관심도가 높아졌다. 따라서 이 연구는 열처리에 따른 백석면의 광물학적 특성 변화를 관찰하여 열분해에 따른 무해화 과정을 알아보고자 하였다. 실험은 캐나다 LAB Chrysotile 광상에서 산출되는 백석면을 이용하여 $600-1,300^{\circ}C$ 범위에서 2시간 동안 열처리를 하였으며, TG-DTA, XRD, FT-IR, SEM-EDS, TEM-EDS 분석을 통해 백석면의 결정구조, 형태 및 화학성분의 변화를 확인하여 광물학적 특성변화를 관찰하였다. 열분해 실험 결과, 섬유상의 hollow tube 구조를 가지는 백석면은 약 $600-650^{\circ}C$에서 흡열반응이 일어남에 따라 팔면체판(MgOH)에서 수산기(OH)가 제거되면서 백석면은 비정질 광물의 형태로 변화하였다(탈수화 1단계). 약 $820^{\circ}C$에서는 발열반응이 관찰되었으며 이는 Mg, Si, O의 재배열 결과 주상의 고토감람석(forsterite, $Mg_2SiO_4$)으로 상전이에 영향을 준 것으로 사료된다(탈수화 2단계). 또한 $800^{\circ}C$ 이상으로 열처리한 일부 시료에서 고토감람석 내 결정구조의 변화가 시작되었고, $1,000^{\circ}C$ 이상에서는 온도 상승에 따라 점진적인 재결정 작용 결과 3차원적으로 성장하여 구형광물로 형태 변화가 나타나며 완화휘석(enstatite, $MgSiO_3$)을 형성하였다. 따라서 이 연구는 다양한 분석법의 적용과 2시간 동안의 열처리를 통하여 백석면의 탈수화 반응에 따른 결정구조의 붕괴와 섬유상 형태의 변형을 확인하였으며, 백석면은 무해 광물인 고토감람석과 완화휘석으로 상전이 됨을 통해 백석면의 무해화 과정을 제시 할 수 있었다.

• 한국축산식품학회:학술대회논문집
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• 한국축산식품학회 1999년도 정기총회 및 제23차 춘계학술발표회
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• pp.97-117
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• 1999

돼지고기 섭취가 카드뮴(Cd)에 중독된 흰쥐의 카드뮴 배설에 미치는 영향을 규명하고자 본 연구를 수행하였다. $CdCl_2$를 카드뮴 기준으로 AIN-76 purified diet에 다섯 수준(0, 25, 50, 100, 250 ppm)으로 혼합한 Cd 중독식이를 8주 동안 급여하여 임상적인 중독을 유발시킨 다음 다시 7주 동안 단백질 급원인 카제인을 돼지고기로 대체시킨 해독식이를 7주간 급여하여 돼지고기에 의한 해독효과를 대조구와 비교하였다. 8주 동안 Cd 중독 실험식이를 급여한 결과, 카드뮴 중독과 관련한 성장지연, 카드뮴의 표적장기인 신장무게의 증가와 헤마토크릿치(Ht)와 헤모글로빈 함량(Hb)이 감소하였다. 병리조직학적 검사 결과 육안병변에서 뚜렷한 임상적인 관찰 예가 나타났다. 카드뮴 급여를 중단하고 해독 실험 사료 급여 후 흰쥐의 체중은 급속하게 회복되었다. 즉 돼지고기 급여구의 흰쥐는 카제인 급여구의 흰쥐에 비해 평균체중이 약간 높았으나 유의적인 차이는 나타나지 않았다. 카드뮴 중독 시 Hb 함량과 Ht치는 카드뮴 농도에 상관하였으나 해독시에 모든 처리군에서 Hb 함량과 Ht치는 정상 범위의 수준으로 증가하여 처리군간에 차이가 나타나지 않았다. 간, 신장, 정소의 무게는 카드뮴 투여에 따라 점차로 낮아졌지만 체중에 따른 간의 비율과 신장의 비율은 카드뮴 투여에 의해 영향을 받지 않은 것으로 나타났다. 체중 100g 당 간의 무게는 250ppm 카드뮴 중독 후 해독 실험사료 급여시 돼지고기를 섭취한 처리군에서 가장 높았다. 카드뮴 섭취량이 높을수록 간과 신장에서의 축적량은 통계적으로 유의하게 차이가 있었고 신장에서의 축적 농도가 간에서 보다 약 2배 정도 높았다. 해독 시에는 간과 신장중의 카드뮴 함량이 감소하였으며 간에서의 Cd 제거 속도가 신장에서 보다 빠른 것으로 보여졌다. 카제인 섭취 군보다 돼지고기 섭취군에서 카드뮴의 축적이 더 낮았고 특히 신장에서의 카드뮴 축적 농도에 영향을 미치는 인자로서 카드뮴 뿐만 아니라 카드뮴과 돼지고기 섭취여부의 교호작용($Cd^{***}$, $Cd{\times}Pork^{***}$) 등이 나타났다. 카드뮴 중독시에 metallothionein(MT)는 Cd의 섭취량이 늘어남에 따라 증가하였지만 해독 시의 결과를 보면 MT합성은 돼지고기에 의해 영향을 받지 않는 것으로 나타났다. 이상의 결과에서 카드뮴의 해독과 관련하여 단백질 급원으로서 카제인을 돼지고기로 대체한 실험식이를 급여하였을 때 돼지고기 첨가군의 성장률이 높았고 Ht치 역시 정상범위로 회복되었다. 신장조직의 병리조직학적 검사 결과 Cd 50ppm 투여군에서부터 돼지고기 첨가군이 돼지고기 무첨가군에 비해 Cd에 의해 손상된 세포를 의미하는 세뇨관의 호염성이 현저하게 감소된 것으로 관찰됨으로서 돼지고기의 Cd 해독능이 유효한 것으로 평가되었다.

• Biotechnology and Bioprocess Engineering:BBE
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• 제8권2호
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• pp.126-129
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• 2003

A relatively high homology between Escherichia coli prolidase and Alteromonas organophosphorous acid anhydrolase suggests that E. coli prolidase may have an activity to d egrade toxic organophosphorous compounds. To confirm this suggestion, we cloned and expressed a prolidase gene (pepQ) of E. coliBL2l. The recombinant E. coli prolidase that consisted of 443 amino acid residues exhibited activity and stereochemical selectivity against organopho sphorous compounds, although its activity was two to three orders of magnitude less than that of the other organophosphorous acid hydrolase isolated from Pseudomonas diminuta.

• Journal of Microbiology and Biotechnology
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• 제7권5호
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• pp.356-359
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• 1997

To study the relationship between oxygen tolerance and enzyme activity in the oxygen metabolism of bifidobacteria, the activities of catalase, superoxide dismutase (SOD), NADH oxidase and NADH peroxidase from six typical bifidobacteria and other bacteria were assayed by spectrophotometry. Catalase activity was hardly detected in any of the bifidobacteria tested. SOD activity was detected in every species including the Clostridium species. In particular SOD activity was notably high in the aerosensitive Bifidobacterium adolescentis. This fact indicates that SOD activity is not a critical factor to ensure aerotolerance. Aerosensitive B. adolescentis showed very low NADH oxidative enzyme activity whereas other aerotolerant bifidobacteria exhibited considerable activity for the enzymes. It seems that detoxification of $H_2O_2$ by NADH oxidative enzymes might be an important factor in improving for aerotolerant bifidobacteria survival rates in an oxygen environment.

• Toxicological Research
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• 제14권2호
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• pp.177-181
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• 1998

Dithiocarbamate and mixed disulfide containing allyl functions were designed and synthesized as putative chemopreventive agents, i.e. N,N-diallyldithiocarbamate (DATC) and S-(N,N-diallyldithiocarbamoyl)-N-acetylcysteine (AC-DATC). DATC and AC-DATC were administered and the activities of cytosolic glutathione S-transferase (GST), glutathione reductase (GR) and microsomal N-nitrosodiethylamine (NDEA) deethylase were assayed in order to test the effects of these organosulfur com-pounds on the detoxification and metabolic activation system of NDEA. The amounts of hepatic glutathione (GSH and GSSG) was also determined. The administration of DATC to rats led to an increase in the activity of GR and to an inhibition of CYP2E1-mediated NDEA deethylation. AC-DATC induced the activity of GR and GST, increased the hepatic GSH content and inhibited the rate of NDEA deethylation. The level of GSSG was decreased as a consequence of the increased activity of GR. These effects may contribute to possible antimutagenic and anticarcinogenic action of the dithiocarbamates investigated.