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US 2002/0001797 A1Published application
Method for detecting endocrine disrupting action of a test substance
OwnerMitsuko Ishihara, Eiichi Akahoshiinventors
Life of this patent
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Abstract
The present invention relates to a method of detecting an endocrine disrupting action of a test substance and also relates to a polynucleotide and a complementary nucleotide specifically expressed in a cell by the endocrine disrupting action, and a DNA chip having either the polynucleotide or the complementary polynucleotide. The present invention further relates to an abnormally-modified protein biosynthesized in a cell specifically by the endocrine disrupting action and an antibody of the abnormally modified protein and a DNA chip provided with the antibody.
Claims23
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which endocrine hormone and the test substance are present;
- (2) determining the presence or absence of an endocrine disrupting action of the test substance by comparing a first gene expression pattern obtained from the cell of the first culture system with a second gene expression pattern expressed by a cell having a sensitivity to the endocrine hormone in the presence of the endocrine hormone, thereby detecting a gene specific to the first gene expression pattern.
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which an endocrine hormone and the test substance are present;
- (b) culturing the cell having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (2) determining the presence or absence of an endocrine disrupting action of the test substance by obtaining a first gene expression pattern obtained from the cell in the first culture system and a third gene expression pattern obtained from the cell in the third culture system, comparing the first gene expression pattern with the third gene expression pattern and a second expression pattern expressed by a cell having a sensitivity to the endocrine hormone in the presence of the endocrine hormone, thereby detecting a gene specific to the first gene expression pattern.
1 more element
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which the endocrine hormone and the test substance are present;
- (b) culturing the cell a having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- (2) determining the presence or absence of an endocrine disrupting action of the test substance by comparing a first gene expression pattern obtained from the cell of the first culture system with a third gene expression pattern obtained from the cell in the third culture system, thereby detecting a gene specific to the first gene expression pattern.
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which the endocrine hormone and the test substance are present;
- (b) culturing the cell a having a sensitivity to the endocrine hormone in a second culture system in which the endocrine hormone is present and the test substance is absent;
- and
- (c) culturing the cell a having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (2) determining the presence or absence of an endocrine disrupting action of the test substance by comparing a first gene expression pattern obtained from the cell in the first culture system with a second gene expression pattern obtained from the cell in the second culture system and the third gene expression pattern obtained from the cell in the third culture system, thereby detecting a gene specific to the first gene expression pattern.
3 more elements
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) determining the presence or absence of an endocrine disrupting action of the test substance by
- (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which the endocrine hormone and the test substance are present;
- (b) culturing a cell having a sensitivity to the endocrine hormone in a second culture system in which an endocrine hormone is present and test substance is absent;
- (c) culturing a cell having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (d) culturing a cell having a sensitivity to the endocrine hormone in a fourth culture system in which both the endocrine hormone and the test substance are absent;
- (2) (a) isolating RNA from the first culture system and preparing a first cDNA based on the RNA;
- (b) isolating a second RNA from the second culture system;
- (c) isolating a third RNA from the third culture system;
- and
- (d) isolating RNA from the fourth culture system and preparing a fourth cDNA based on the RNA;
- (3) (a) hybridizing the first cDNA and the second RNA and recovering unhybridized cDNA;
- (b) hybridizing the third RNA and the fourth cDNA, recovering unhybridized RNA;
- and
- (4) hybridizing the cDNA obtained in (a) of (3) and the RNA obtained in (b) of (3);
- and recovering unhybridized RNA, thereby detecting a gene specific to an endocrine disrupting action.
13 more elements
A polynucleotide obtained in a method comprising the following, and a complementary polynucleotide having a complementary sequence of said polynucleotide,
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which the endocrine hormone and a test substance are present;
- (b) culturing a cell having a sensitivity to the endocrine hormone in a second culture system in which the endocrine hormone is present and the test substance is absent;
- and
- (c) culturing a cell having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (2) obtaining first, second, third gene expression patterns from the first, second, third culture systems, and comparing the first, second, third gene expression patterns with each other, thereby detecting and isolating a gene specific to the first gene expression pattern.
3 more elements
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) culturing a cell having a sensitivity to an endocrine hormone in a first culture system with the endocrine hormone and the test substance;
- and
- (2) determining the presence or absence of an endocrine disrupting action of the test substance by comparing a first glycoprotein pattern obtained from the cell of the first culture system with a second glycoprotein pattern expressed by a cell having a sensitivity to the endocrine hormone in the presence of the endocrine hormone, thereby detecting a glycoprotein specific to the first glycoprotein pattern.
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system with the endocrine hormone and the test substance;
- and
- (b) culturing a cell having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (2) determining the presence or absence of endocrine disrupting action of the test substance by
- obtaining a first glycoprotein pattern obtained from the cell of the first culture system and a third glycoprotein pattern obtained form the cell of the third culture system, and
- comparing the first glycoprotein pattern with the third glycoprotein pattern and a second glycoprotein pattern obtained from a cell having a sensitivity to the endocrine hormone in the presence of the endocrine hormone, thereby detecting a glycoprotein specific to the first glycoprotein pattern.
4 more elements
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which the endocrine hormone and the test substance are present;
- and
- (b) culturing a cell having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (2) determining the presence or absence of endocrine disrupting action of the test substance by
- comparing the first glycoprotein pattern obtained from the cell of the first culture system with the third glycoprotein pattern obtained from the cell of the third culture system, thereby detecting a glycoprotein specific to the first glycoprotein pattern.
3 more elements
A method of detecting an endocrine disrupting action of a test substance, comprising:
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which the endocrine hormone and the test substance are present;
- (b) culturing a cell having a sensitivity to the endocrine hormone in a second culture system in which the endocrine hormone is present and the test substance is absent;
- and
- (c) culturing a cell having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (2) determining the presence or absence of an endocrine disrupting action of the test substance by comparing first, second and third glycoprotein patterns obtained respectively from the cells of the first, second, third culture systems, thereby detecting a glycoprotein specific to the first glycoprotein pattern.
3 more elements
An antibody against a substance susceptible to an endocrine disrupting action, said antibody being prepared by a method comprising:
- (1) (a) culturing a cell having a sensitivity to an endocrine hormone in a first culture system in which the endocrine hormone and a test substance are present;
- (b) culturing a cell having a sensitivity to the endocrine hormone in a second culture system in which the endocrine hormone is present and the test substance is absent;
- and
- (c) culturing a cell having a sensitivity to the endocrine hormone in a third culture system in which the endocrine hormone is absent and the test substance is present;
- and
- (2) extracting proteins biosynthesized by a cell contained in each of the first, second and third culture systems of (1);
- (3) recovering a glycoprotein by binding a substance capable of specifically binding to a polysaccharide chain contained in the proteins extracted in (2) to the polysaccharide chain;
- (4) recovering a protein contained in the glycoprotein by cutting off the polysaccharide chain;
- subjecting the protein to electrophoresis, thereby obtaining a glycoprotein pattern for each of the first, second and third culture systems;
- (5) comparing the glycoprotein patterns to each other, thereby detecting a glycoprotein specific to the first culture system, and further recovering a protein contained in the glycoprotein;
- (6) preparing a polyclonal antibody against the protein obtained in (5),
- (7) recovering a desired glycoprotein from the proteins extracted in (2) by the polyclonal antibody obtained;
- and
- (8) preparing an antibody against to a polysaccharide chain contained in the glycoprotein obtained in (7).
11 more elements
Dependencies are inferred from the claim text.