• 제목/요약/키워드: 2,3,7,8,-Tetrachlorodibenzo-p-dioxin

검색결과 127건 처리시간 0.027초

Differential Gene Expression after treatment with 2,3,7,8-tetrachlorodibenzo-p-dioxin in Hairless Mice Skin

  • Kang, Mi-Kyung;Kang, Ho-Il;Ryeom, Tai-Kyung;Eom, Mi-Ok;Park, Mi-Sun;Jee, Seung-Wan;Kim, Ok-Hee
    • 한국환경독성학회:학술대회논문집
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    • 한국환경독성학회 2003년도 추계국제학술대회
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    • pp.172-172
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    • 2003
  • 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD), a prototype of many halogenated aromatic hydrocarbons, is a ubiquitous, persistent environmental contaminant and displays high toxicity in animals and has been implicated in human carcinogenesis. Although the mechanism of carcinogenesis by TCDD is unclear, it is considered to be a non-genotoxic and tumor promoter. In this study, we investigated the tumor promotion effect of TCDD on the two-stage skin chemical carcinogenesis using hairless mouse (SKH1). We induced papillomas after treatment with N-methyl -N'-nitro-N-nitorsoguanidine (MNNG) as a initiator and TCDD as a promoter for 30 weeks. We found that the incidence or multiplicity of papillomas and hyperplastic nodules was maximally induced at MNNG-TCDD group compare to control, MNNG, and TCDD alone. These results suggesting that TCDD can acts as a potent promoter in the hairless mouse skin. In addition, we used cDNA microarray to detect the differential gene expression in normal, tumor surrounding, and tumor regions induced in hairless mouse skin by MNNG plus TCDD protocol. We found that 49 and 42 genes out of 5,592 genes associated with protein synthesis, cell organization, lipid transport and oxidative stress in tumor and surrounding regions were up- or down- regulated two fold or more, respectively. We are currently investigating how these genes play a role in TCDD-mediated chemical carcinogenesis.

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Regulation of Cyp 1A1 Gene Expression by Retinoic Acid Receptor, Retinoid X Receptor and Constitutive Androstane Receptor in Rainbow Trout Hepatoma Cells(Rth 149)

  • Kim, Ji-Sun;Yang, So-Yeun;Seo, Mi-Jung;Sheen, Yhun-Yhong
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2003년도 추계학술대회
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    • pp.136-136
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    • 2003
  • Exposure of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) causes a variety of biological and toxicology effects, most of which are mediated by aryl hydrocarbon receptor (AhR). The ligand-bound AhR as a heterodimer with AhR nuclear translocator (ARNT) binds to its specific DNA recognition site, the dioxin-responsive element (DRE), and it results in increased transcription of CVP1A1 gene.(omitted)

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Effects of Houttuynia cordata Thunb on Atherosclerosis and Lipidperoxidation in 2,3,7,8-TCDD-Damaged Rats

  • Kim, Hee-Jin;Lee, Sang-Hun;Lee, Jin-Young;Ha, Bae-Jin
    • 대한약학회:학술대회논문집
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    • 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2-2
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    • pp.208.2-208.2
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    • 2003
  • TCDD (2,3,7,8-tetrachlorodibenzo-p-dioxin), one of the notorious toxic environmental pollutants, damages various organs including liver and is regarded as an endocrine disrupter. To investigate the effects of Houttuynia cordata Thunb (HCT) on the biochemical parameters of function, liver and serum of TCDD-treated rats were used. After 7 days from TCDD (1 $\mu\textrm{g}$/kg) injection, HCT (200 mg/kg) was administered into rats intraperitoneally for 4 weeks. The lipidperoxide content was examined by measuring the level of total cholesterol, HDL-cholesterol, LDL-cholesterol, total lipid and triglyceride (TG) in serum, and malondialdehyde (MDA) in liver tissue of rats. (omitted)

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Effects of Dioxin Exposed in Human by Using Radioactive cDNA Microarray

  • Ryu, Yeon-Mi;Kim, Ki-Nam;Kim, Hye-Won;Sohn, Sung-Hwa;Lee, Seung-Ho;Kim, Yu-Ri;Seo, Sang-Hui;Lee, Seung-Min;Lee, Eun-Il;Kim, Meyoung-Kon
    • Molecular & Cellular Toxicology
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    • 제2권1호
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    • pp.35-47
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    • 2006
  • 2, 3, 7, 8-Tetrachlorodibenzo-p-dioxin (TCDD) are well known as the most toxic environmental compound in these days. Many researches are reported that dioxin produces multiple toxic effects, such as endocrine toxicity, reproductive toxicity, immunotoxicity and cancer. In this study, we carried to discover novel evidence for previously unknown gene expression patterns in human exposed to dioxin by using radioactive cDNA microarray. 548 workers who were divided into experimental and control groups according to their urinary Naphthol levels were enrolled in our study. Blood mRNA in human was isolated, and the gene expression profiles were analyzed by cDNA microarray. Gene expression analysis identified 52 genes which exhibited a significant change. In our study, most notably, genes involved in cell cycle, cell proliferation, signal transduction and apoptosis in human exposed to dioxin, such as CCND3, TSHR, and EFRN5, were up-regulated. In the current study, we observed gene expression of people that are exposed to dioxin using radioactive cDNA microarray. Through these results, we suggest when objects are exposed to toxic compounds, such as dioxin, the radioactive cDNA microarray may be using in sensitively detecting of cancerous change.

홍삼의 사포닌이 다이옥신에 의한 급성독성 유도 웅성 기니피그의 혈액성분에 미치는 영향 (Effect of Red Ginseng Saponin Fraction on the Blood Components of Male Guinea Pigs with Acute Toxicity induced by 2,3,7,8-Tetracholorodibenzo-ρ-dioxin (TCDD))

  • 김병원;이윤복;박재승;박지원;황석연
    • 디지털융복합연구
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    • 제11권4호
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    • pp.339-350
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    • 2013
  • 홍삼 사포닌분획(SF)투여 시 TCDD(2,3,7,8-tetracholorodibenzo-${\rho}$-dioxin)투여(TT)에 의해 감소했던 웅성 기니피그의 체중과 간, 콩팥, 지라, 고환의 무게가 유의하게 증가하였다(p>0.01). SF투여 시 TCDD투여에 의해 감소했던 헤마토크릿 값, 적혈구 및 혈소판의 수, 아밀라아제 및 lactate dehydrogenase의 활성도, 요산, 총단백질 및 알부민의 양은 증가했고, 증가했던 백혈구의 수, 중성지질, 총콜레스테롤(TC), 혈당, 저밀도지단백질-콜레스테롤, 고밀도지단백질-콜레스테롤, 크레아티닌, 혈중 요소질소, 칼슘 및 인의 양과 creatinine kinase, aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase의 활성은 감소하였다. 그리고 적혈구, 백혈구, 혈소판, 혈당, TC, 칼슘 및 알부민을 제외한 모든 지표들은 통계학적 유의성을 보였다(p>0.01). 이상의 결과로부터 SF는 TCDD에 의해 유도된 기니피그의 급성독성을 완화시켜 주는 효과가 있음을 알 수 있었다.

Development of Luciferase Reporter Gene-based Cell Bioassay for the Aromatic Hydrocarbon Receptor Agonists

  • Kim, Sun-Young;Choi, Eun-Jung;Yang, Jae-Ho
    • The Korean Journal of Physiology and Pharmacology
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    • 제10권6호
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    • pp.349-354
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    • 2006
  • The aromatic hydrocarbon receptor (AhR) is a ligand-activated transcription factor that mediates many of the biological and toxicological effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD, dioxin) and related chemicals. The application of recombinant reporter plasmid such as the firefly luciferase gene has proven to be a very effective method to detect these chemicals. The bioassay system, CALUX, is sensitive in directly detecting AhR-agonists from a variety of environmental and biologic materials. However, responses of the AhR-dependent bioassays are dependent on the cell types used. Thus, we developed a sensitive bioassay using the recombinant mouse hepatoma cell (Hepa1c1c7) for the determination of dioxins. The recombinant cell line was stably transfected with firefly luciferase reporter gene (pGudLuc1.1). The transfected cells showed the highest induction of luciferase activity at 4.5 hr and a decrease beyond this time point. The system showed the highest sensitivity of detection ever reported. Upon TCDD exposure cells showed 2 fold increase at 10 pM and 7 fold increase at 100 pM, respectively. The passage number after the transfection played an important role in the sensitivity. The increase of passage number tended to increase the sensitivity of the cells up to 15. The media without phenol red showed a higher induction rate than with phenol red, suggesting the preferable use of phenol red-free media for the bioassay. Since each of the assays has unique characteristics that make them suitable for some screening applications and not others, development of sensitive bioanalytical methods based on a variety of cellular systems in a key to the successful determination of dioxins. The bioassay system developed in this study will contribute to further development of successful screening the AhR agonists among the environmental mixture. In addition, the rapid and sensitive nature of this cellular system can be applied as a valuable tool to screen the dioxin-like moieties among the prodrugs at the initial stage, thereby expediting the new drug discovery.

유전독성, 발암성 화학물질이 ROS 생성에 미치는 영향 (Effect of Genotoxicity or Carcinogenecity Chemicals on the ROS Production)

  • 고서연;신윤용
    • Environmental Analysis Health and Toxicology
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    • 제23권1호
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    • pp.23-32
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    • 2008
  • In the present study, ROS detection of L5178Y cells that were treated with twenty test compounds in order to find out hydrogen peroxide ($H_2O_2$) induction for genotoxicity and carcinogenic toxicity. Twenty test compounds were consist of four classes, such as genotoxic carcinogens, genotoxic noncarcinogens, nongenotoxic carcinogens, and nongenotoxic noncarcinogens. Genotoxic carcinogens are 1,2-dibromoethane, glycidol, melphalan, diethylstilbestrol and urethane. Genotoxic noncarcinogens are 8-hydroxyquinoline, emodin, acetonitrile and diallylphthalate, L-ascorbic acid. Nongenotoxic carcinogens are methyl carbamate, O-nitrotoluene, 1,4-dioxane, tetrachloroethylene and 2,3,7,8-tetrachlorodibenzo-p-dioxin. And nongenotoxic noncarcinogens are D-mannitol, 1,2-dichlorobenzene, caprolactam, bisphenol A and chlorpheniramine maleate.

고본양정방 투여가 TCDD 유도 랫드의 항산화 변화에 미치는 영향 (The Effects of Gobonyangjeonbang Administration on Antioxidative of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induced Rats.)

  • 양동현;오지혜;박운규;조충식;황석연
    • 한국산학기술학회논문지
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    • 제21권10호
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    • pp.231-239
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    • 2020
  • 본 연구의 목적은 TCDD로 인해 발생하는 산화적 스트레스에 대한 GYB의 내분비 기능 및 항산화 효능에 미치는 영향을 평가하기 위한 것이다. 2017년도에, 산화적 스트레스에 대한 GYB의 효능을 평가하기 위해 35마리의 수컷 SD랫드를 5개의 그룹으로 나누어 실험하였다. 정상 대조군은 vehicle 및 saline을 투여하였으며, TCDD 단독투여그룹은 TCDD(2 ㎍/kg, weeks) 및 생리식염수를 복강 내 투여하였으며, 시험 군은 6주 동안 GYB (75, 150, 300 mg/kg)를 3가지 농도로 나누어 경구로 투여하였다. 체중은 NC 그룹의 랫드와 비교하였을 때 TCDD 노출 후 6주 후에 유의하게 감소하였다(p<0.001). 그러나 TCDD에 의한 체중 감소는 GYB 300 mg/kg 투여에 의해 현저하게 보호되었다(p<0.01). TCDD로 유도된 랫드의 간은 세포질의 공포 변성이 나타났으며, 간의 동양 혈관과 중량의 증가를 나타냈다. MDA, SOD를 측정한 결과, TCDD 투여에 의하여 두 항목 모두 감소하는 경향이 나타났다. 반면, GYB 투여에 의한 변화는 나타나지 않았고, SOD 결과에서 GYB 300군에서 NC군 대비 유의성이 관찰(p<0.05) 되었다. 이러한 발견은 GYB가 랫드에서 TCDD 유도 간 독성에 대해 보호 효과를 가질 수 있음을 증명하였다.

생약재제가 Dioxin의 연속투여 후 생식독성의 완화에 미치는 영향 관한 연구 (Effects of a Herb Drug Extracts on Mitigation of Reproductive Toxicity after a Continuous Dose of Dioxin in Mice)

  • 김상근;김민수
    • 한국가축번식학회지
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    • 제24권3호
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    • pp.241-248
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    • 2000
  • 본 연구는 생약제재가 dioxin의 연속투여시 생식독성 완화에 미치는 영향을 구명하고저 30 $\mu\textrm{g}$/kg의 dioxin을 5일간 연속투여 후 생약제재를 3주간격일로 경구투여 했을 때 정자수, 정자활력, 정소중량 및 정소조직에 미치는 영향을 조사하였다. 1. Dioxin 10~20 $\mu\textrm{g}$/kg을 5일간 연속투여한 군의 정자수는 90.7$\pm$3.6~l18.5$\pm$3.6$\times$$10^{6}$$m\ell$, 30~40 $\mu\textrm{g}$/kg투여군의 정자수는 67.3$\pm$4.1~88.2$\pm$3.3$\times$$10^{6}$$m\ell$로서 대조군의 119.3$\pm$3.4~120.2$\pm$4.7$\times$$10^{6}$$m\ell$에 비해 현저히 감소된 정자수를 나타냈다(p<0.05). 2. dioxin 10~20 $\mu\textrm{g}$/kg 투여군의 정자활력은 77.0$\pm$4.7~89.5$\pm$3.6%, 30~40$\mu\textrm{g}$/kg 투여군은 66.5$\pm$3.3~79.9$\pm$3.8%로서 대조군의 93.6$\pm$3.8~94.9$\pm$3.4%에 비해 현저히 감소된 정자활력을 나타냈다(p<0.05). 3. Dioxin 30 $\mu\textrm{g}$/kg을 5일간 연속투여 후 녹차, 홍삼, 구기자, 오메 추출물을 격일로 3주간 투여했을 때 정자수는 각각 77.4$\pm$3.2~90.9$\pm$3.4$\times$$10^{6}$$m\ell$, 78.0$\pm$3.3~105.0$\pm$4.2$\times$$10^{6}$$m\ell$, 76.2$\pm$2.8 ~84.4$\pm$3.5$\times$$10^{6}$$m\ell$, 75.4$\pm$3.3~80.2$\pm$3.3$\times$$10^{6}$$m\ell$이었다. 4. Dioxin 30 $\mu\textrm{g}$/kg을 5일간 연속투여 후 녹차, 홍삼, 구기자, 오메 추출물을 격일로 3주간 투여했을 때 정자활력은 대조군의 119.3$\pm$3.4~120.2$\pm$4.7$\times$$10^{6}$$m\ell$와 93.0$\pm$3.5~96.1$\pm$3.5%에 비해 홍삼추출물 투여군에서는 회복이 현저하였고(p<0.05), 녹차는 다음이었으며, 구기자, 오메는 회복이 미미하였다. 5. Dioxin 30 $\mu\textrm{g}$/kg을 5일간 연속투여 후 녹차, 홍삼, 구기자, 오메 추출물을 각각 격일로 3주간 투석했을 때 정소중량은 대조군의 0.15$\pm$0.01~0.16$\pm$0.01g에 비해 낮은 치를 나타냈으며 홍삼추출물 투여군에서는 회복효과가 현저하였다. 6. Dioxin 30 $\mu\textrm{g}$/kg을 5일간 연속투여 후 녹차, 홍삼, 구기자, 오메를 각각 3주간 격일로 경구 투여했을 때 간, 비장 및 정소조직은 대조군에 비해 심한 손상이 관찰되었으며, 정소는 홍삼 투여군에서 많은 회복이 관찰되었다.

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상엽 물추출물이 다이옥신 유도 독성에 대한 흰쥐의 혈액 생화학지표에 미치는 영향 (The Effect of Mulberry Leaf Extract on Blood biochemical parameters in White Rats Exposed to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD))

  • 이윤복;배수정;이다경;박재승;박지원;김병원;황석연
    • 디지털융복합연구
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    • 제11권1호
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    • pp.299-308
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    • 2013
  • TCDD 독성이 유발된 흰쥐 혈액의 생화학적 지표에 미치는 상엽 물추출물 (MLE)의 효과를 조사하였고 통계자료는 일원분산분석과 Scheffe의 사후검증을 하였다. TCDD 투여 시 감소했던 백혈구와 혈소판의 수가 MLE투여로 급격하게 회복(p<0.01)되어 면역기능 개선효과가 있었다. TT에 의해 감소했던 혈중 칼슘 및 마그네슘의 농도는 MLE 투여 시 유의하게 증가(p<0.01)하였으나 인의 농도는 TT군에 비하여 MLE군이 유의하게 감소(p<0.01)하였다. 신장 기능과 관련된 creatinine 및 blood urea nitrogen은 TT군과 MLE군 사이에 유의성은 없었으며, 요산은 TT군과 MLE군 모두에서 감소하였다. 한편 TT에 의해 증가했던 glucose 농도, amylase 및 lipase의 효소 활성도는 MLE 투여시 유의하게 감소(p<0.01)하여 혈당상승 억제효과가 있었다. Total protein, ${\gamma}$-GTP 활성은 TT와 MLE의 영향을 거의 받지 않았으나 TT에 의해 증가했던 AST, ALT 및 ALP의 활성도는 MLE 투여 시 모두 유의하게 감소(p<0.01)하여 간기능 개선의 효과가 있었다. 한편 Total cholesterol, triglyceride와 LDL-cholesterol의 경우 TT에 의해 유발된 고지혈 증상이 MLE 투여 시 유의하게 감소(p<0.01)하여 항고지혈 효과가 있었으며 HDL-cholesterol은 TT군과 MLE군 모두에서 증가하였다. 이와 같이 MLE는 TCDD독성이 유발된 흰쥐에서 독성을 완화시켜 주는 작용이 있음을 알 수 있었다.