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Expression Profiling of Estrogenic Compounds Using a Sheepshead Minnow cDNA Macroarray
Author(s) -
Patrick Larkin,
Leroy C. Folmar,
Michael J. Hemmer,
Arianna J. Poston,
Nancy D. Denslow
Publication year - 2002
Publication title -
environmental health perspectives
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.257
H-Index - 282
eISSN - 1552-9924
pISSN - 0091-6765
DOI - 10.1289/txg.5752
Subject(s) - gene expression profiling , biology , complementary dna , computational biology , bioinformatics , gene expression , genetics , gene
A variety of anthropogenic compounds are capable of binding to the estrogen receptor (ER) of vertebrate species. Binding of these chemicals to the ER can interfere with homeostasis by altering normal gene expression patterns. The purpose of this study was to characterize the expression of 30 genes using a sheepshead minnow (Cyprinodon variegatus) cDNA macroarray. Many of the genes on the array were previously identified by differential display reverse transcriptase– polymerase chain reaction to be upregulated or downregulated in sheepshead minnows treated through aqueous exposure to known or suspected estrogenic chemicals. The results of this study show that 17β-estradiol (E 2), 17α-ethinyl estradiol (EE 2), diethylstilbestrol (DES), and methoxychlor (MXC) have similar genetic signatures for the 30 genes examined. The genetic signature of fish treated with p-nonylphenol was identical in pattern to that in fish treated with E 2, EE 2, DES, and MXC except for the additional upregulation of a cDNA clone that shares similarity to ubiquitin-conjugating enzyme 9. Endosulfan produced results that resembled the gene expression patterns of untreated control fish with exception of the upregulation of estrogen receptor α and the downregulation of a cDNA clone that shares similarity to 3-hydroxy-3-methylglutaryl–coenzyme A reductase. We show that our estrogen-responsive cDNA macroarray can detect dose-dependent changes in gene expression patterns in fish treated with EE 2. Key words: array, biomarkers, endocrine disruption, estrogen, fish, macroarray. Environ Health Perspect 111:839–846 (2003). doi:10.1289/txg.5752 available vi

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