Abstract:
:A major challenge in the emerging field of toxicogenomics is to define the relationships between chemically induced changes in gene expression and alterations in conventional toxicologic parameters such as clinical chemistry and histopathology. We have explored these relationships in detail using the rodent uterotrophic assay as a model system. Gene expression levels, uterine weights, and histologic parameters were analyzed 1, 2, 4, 8, 24, 48, and 72 hr after exposure to the reference physiologic estrogen 17 beta-estradiol (E2). A multistep analysis method, involving unsupervised hierarchical clustering followed by supervised gene ontology-driven clustering, was used to define the transcriptional program associated with E2-induced uterine growth and to identify groups of genes that may drive specific histologic changes in the uterus. This revealed that uterine growth and maturation are preceded and accompanied by a complex, multistage molecular program. The program begins with the induction of genes involved in transcriptional regulation and signal transduction and is followed, sequentially, by the regulation of genes involved in protein biosynthesis, cell proliferation, and epithelial cell differentiation. Furthermore, we have identified genes with common molecular functions that may drive fluid uptake, coordinated cell division, and remodeling of luminal epithelial cells. These data define the mechanism by which an estrogen induces organ growth and tissue maturation, and demonstrate that comparison of temporal changes in gene expression and conventional toxicology end points can facilitate the phenotypic anchoring of toxicogenomic data.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Moggs JG,Tinwell H,Spurway T,Chang HS,Pate I,Lim FL,Moore DJ,Soames A,Stuckey R,Currie R,Zhu T,Kimber I,Ashby J,Orphanides Gdoi
10.1289/txg.7345subject
Has Abstractpub_date
2004-11-01 00:00:00pages
1589-606issue
16eissn
0091-6765issn
1552-9924journal_volume
112pub_type
杂志文章abstract::This paper examines recent risk assessments for benzene and observes a number of inconsistencies within the study and consistencies between studies that should effect the quantitative determination of the risk from benzene exposure. Comparisons across studies show that only acute myeloid leukemia (AML) is found to be ...
journal_title:Environmental health perspectives
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更新日期:1985-02-01 00:00:00
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更新日期:1976-10-01 00:00:00
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更新日期:1998-04-01 00:00:00
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更新日期:2008-11-01 00:00:00
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更新日期:1995-12-01 00:00:00