Abstract:
본 발명은 에스트로겐 반응성 리포터 유전자가 도입된 제브라피쉬 및 이를 이용한 에스트로겐 화합물의 스크리닝 방법에 관한 것이다. 보다 구체적으로, 본 발명은 제브라피쉬 뇌 아로마타제 유전자(zebrafish brain aromatase gene)의 인접 프로모터와 상기 프로모터에 의해 그 발현이 조절되는 형광단백질 리포터 유전자가 연결된 유전자 컨스트럭트가 도입된 제브라피쉬 및 여기에 시험물질을 처리한 후 리포터 유전자의 발현정도를 측정하는 것을 특징으로 하는 에스트로겐 화합물의 스크리닝 방법에 관한 것이다. 본 발명의 스크리닝 방법은 에스트로겐 활성을 가진 화합물을 결정하기 위한 새로운 생체 내( in vivo ) 시스템으로서 상기 시스템은 생체 내 기능을 모사할 수 있으므로 생체 내에서 에스트로겐 활성을 가진 화합물을 신속하고 효과적으로 스크리닝할 수 있다. 에스트로겐 화합물, 제브라피쉬, 뇌 아로마타제 유전자, 스크리닝
Abstract:
A method for quantitatively analyzing the absolute value of fluorescence intensity and the amount of EGFP (Enhanced Green Fluorescent Protein) in a transgenic fish is provided to quantitatively measure the harmfulness of toxic material. A method for qualitatively analyzing the amount of GFP or EGFP of transgenic fish comprises: a first step of measuring the fluorescence intensity based on the amount of the GFP and purified GFP and forming standard linear equation; a second step of inserting a toxic material reactive gene promoter in a vector which expresses GFP or EGFP to produce the transgenic fish; a third step of measuring the fluorescence intensity which the transgenic fish expresses; a fourth step of calculating the amount of GFP or EGFP corresponding to the fluorescence intensity; and a step of measuring the amount of purified GFP or EGFP and forming standard linear equation.
Abstract:
Diagnostic methods for SARS(severe acute respiratory syndrome) by using nucleocapside or spike protein are provided to improve the safety and accuracy of diagnosis and allow early diagnosis, so that they are applicable to general laboratories and hospitals without a risk of infection. A method for diagnosis of SARS comprises the steps of: amplifying a gene encoding SARS-CoV-N(SARS coronavirus-nucleocapsid protein) and amplifying the amplified gene to Escherichia coli to produce an SARS-CoV-N antigen; producing an antibody against the SARS-CoV-N antigen; and reacting a specimen containing the SARS-CoV-N antibody coupled with a coloring material such as enzyme or gold and the SARS-CoV antigen with a membrane adsorbing the SARS-CoV-N antibody. A diagnostic kit contains the membrane adsorbing the SARS-CoV-N antibody and solution containing the SARS-CoV-N antibody coupled with a coloring material. A method for preparing SARS-CoV-S(SARS coronavirus-spike protein) antigen comprises the steps of: amplifying a gene encoding SARS-CoV-S antigen and inserting the amplified gene into a vector; transfecting 293 T cell with an expression vector containing SARS-CoV-S antigen; and infecting the transformed 293 T cell with VSV(vesicular stomatitis vesicle) to produce SARS-CoV-S antigen. Further, the antibody is a single clone antibody.
Abstract:
A method for evaluating toxicity through the expression of fluorescence protein in a transgenic embryo of animal is provided to compare toxic degree between different species and analyze at the initial developing stage. A method for evaluating the effect on a toxic material in developing embryo comprises: a first step of injecting a fluorescence protein expression vector in which toxic material-reactive gene promoter is inserted in an embryo to produce a transgenic embryo of animal; and a second step of evaluating the expression of fluorescence protein by exposing the embryo with the toxic material. The animal is zebrafish. The used toxic material is arsenic.
Abstract:
A zebrafish having an estrogen reactivity reporter gene and a screening method thereby are provided to screen compounds with estrogen activity in a living body. A recombinant plasmid introduced in a zebrafish fertilized egg comprises a gene construct for connecting an adjacent promoter of a zebrafish brain aromatase gene to a reporter gene whose expression is controlled by the promoter. The zebrafish brain aromatase gene is indicated as a sequence number 1. The report gene is selected from the group consisting of EGFP(enhanced green fluorescent protein), GFP(green fluorescence protein), RFP(red fluorescence protein), luciferase gene, and a beta- galactosidase gene.
Abstract:
A transgenic zebrafish for searching environmental contaminants and a method for preparing the same are provided to evaluate the preclinical effect and sensitivity by providing a biomarker for risk of the environmental contaminants. A method for preparing a transgenic zebrafish for searching environmental contaminants comprises the steps of: (a) cloning a pollutant response gene promoter of human such as HSRE(heat shock responsive element) and AhRE(aryl-hydrocarbon responsive element); (b) inserting the promoter into a vector expressing a fluorescent protein; and (c) introducing the vector into zebrafish. A transgenic zebrafish for searching environmental contaminants prepared by the method is characterized in that it radiates when it is exposed to environmental stress such as heat, cold, oxygen deficiency, Cd, L-azetidine-2-carboxylic acid, 2,3,7,8-tetrachlorodibenzo-p-dioxin, 3-methylcholanthrene, 3,4,5,3',4',5'-hexabromobiphenyl, Aroclor 1254 and benzo[a]pyrene.