摘要:
The present invention is directed to a method of detecting dioxin-like compounds in a test sample. The test sample is contacted with a heteromer formed from a plurality of proteins, one of which is an inactive Ah receptor. If dioxin-like compounds are present in the test sample, they will bind to the Ah receptor causing it to dissociate from the heteromer as a complex containing active Ah receptor bound to a dioxin-like compound ligand. The presence of the complex is then detected. The process of the present invention can be practiced utilizing solid phase capture, competitive, and sandwich immunoassay test kit formats.
摘要:
A recombinant cell line deposited at the American Type Culture Collection under ATCC accession number CRL-12286, also known as the mouse H1L1.1 cell line, has been made by using genetic engineering techniques for inserting dioxin responsive elements upstream of a luciferase reporter gene, and then, transfecting the resultant recombinant expression plasmid, identified as pGudLuc1.1, into mouse hepatoma cells. The mouse H1L1.1 cell line is useful in a method for the quantitative analysis of polyaromatic hydrocarbons in samples.
摘要:
This invention relates to the determination of in vivo exposure to dioxinlike compounds and the in vitro quantitation of dioxinlike compounds based on protein tyrosine phosphorylation as mediated by the Ah receptor. The extent of protein tyrosine phosphorylation is determined by monoclonal antibodies to protein tyrosine phosphate. The amount and nature of protein tyrosylphosphate is quantitatively related to the in vivo or in vitro concentration of dioxin to which animals or cells were exposed. This method permits detection of dioxinlike compounds at concentrations in the parts per trillion and parts per billion range.
摘要:
The invention relates to a method or a cell free system of detecting dioxin-like compounds in a test sample using a whole cell lysate derived from a cell transfected to express a fusion protein comprising an AHR fused to a reporter peptide. The method in combination with bioluminescence resonance energy transfer (BRET) technique is also provided so as to improve the sensitivity.
摘要:
The invention relates to a method or a cell free system of detecting dioxin-like compounds in a test sample using a whole cell lysate derived from a cell transfected to express a fusion protein comprising an AHR fused to a reporter peptide. The method in combination with bioluminescence resonance energy transfer (BRET) technique is also provided so as to improve the sensitivity.
摘要:
The invention provides a highly sensitive measurement and detection technique for dioxins, which has advantages inherent to immunoassay; and markers to be used in the technique. Disclosed are a biotinylated dioxin derivative of formula (1): 1 (wherein X represents a hydrogen atom or a chlorine atom; R1 represents a biotin residue; R2's, which may be identical to or different from one another, independently and individually represent an arginine residue or a lysine residue; n is an integer from 1 to 5 inclusive; and m is an integer from 1 to 3 inclusive), and an immunoassay method for dioxins characterized by using the derivatives as a marker.
摘要:
Improved cellular assay systems for detecting polycyclic aromatic hydrocarbons, dioxins, PCBs, and other substances which are agonists of the aryl hydrocarbon receptor (AHR) are disclosed. The assays utilize one or more additional cellular proteins involved in the AHR signaling pathway, which improve the sensitivity and maximal responsiveness of the assay systems.
摘要:
A screening measurement technology enabling a prompt determination about whether or not further confirmation is required by another measuring method, for an environmental sample, such as a sample containing dioxins, is provided. A sample solution in which a known amount of antibodies are mixed, is poured into a measurement cell (101) where an antigen derivative (107) that acquires antibodies of a subject substance comprising an antigen, is arranged in a flow channel (106) for the sample solution; whether or not a measurement result is within a pre-determined range including a reference value of the subject substance is determined based upon time-series signals of the measurement result; and the measurement result is transmitted.
摘要:
An aliphatic hydrocarbon solvent solution obtained by extracting dioxins contained in a specimen such as soil with an aliphatic hydrocarbon solvent is supplied to an alumina layer 33 side of a sample-preparation column 30 in which the alumina layer 33 is placed on a carbon material layer 32. Upon flowing and passing of an aliphatic hydrocarbon solvent through the alumina layer 33 and the carbon material layer 32 in this order, the dioxins contained in the aliphatic hydrocarbon solvent solution are trapped in these layers. Then, one extracting solvent among toluene, a mixed solvent of toluene and an aliphatic hydrocarbon solvent, and a hydrophilic solvent capable of dissolving dioxins is supplied to the sample-preparation column 30 in the direction opposed to the passing direction of the aliphatic hydrocarbon solvent, the dioxins trapped in the carbon material layer 32 and the alumina layer 33 are extracted to obtain a sample for analysis of dioxins.
摘要:
A principal object of the present invention is to provide low-cost techniques for readily detecting or quantifying dioxins using substances which are inexpensive and can be easily produced, and extracting dioxins using such substances. Dioxin binding peptides of the present invention are highly selective to dioxins, and are therefore capable of detecting or quantifying dioxins in test samples containing impurities. Dioxin binding peptides of the present invention are also capable of selectively extracting dioxins from impurity-containing test samples, and are therefore useful in simple pretreatment for quantifying and analyzing dioxins.