Title: Cerebellum from mice exposed to chronic low-level chlorpyrifos oxon

Accession Number: GSE25250

Link to Dataset: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE25250

Repository: Gene Expression Omnibus (GEO)

Data Type(s): Gene Expression

Experiment Type(s): Expression profiling by array

Organism(s): Mus musculus

Summary: Chlorpyrifos (CPF) is an organophosphorus (OP) insecticide that is still widely used despite statutory restrictions on home use. CPF is converted to chlorpyrifos oxon (CPO) by oxidative desulfuration in liver. Paraoxonase (PON1) polymorphisms affects the catalytic efficiency of the hydrolysis of OPs, including CPO. We used both wt (PON1+/+) and PON1 knockout (PON1-/-) mice and PON1-/- mice carrying transgenes encoding the human alloforms tgHuPON1Q192 and tgHuPON1R192 to gain insight into the mechanisms of neurotoxicity of CPO throughout postnatal development, and to ascertain the importance of the PON1Q192R polymorphism for protecting against developmental toxicity of CPO. Whole-genome microarrays were used to measure gene expression changes associated with chronic CPO exposure of developing (PND 4-21) PON1-/-, tgHuPON1Q192R transgenic and PON1+/+ mice. Expression profiles are derived from cerebella from wild-type C57/Bl6 and PON1-/- on a C57/Bl6 background and two transgenic strains (tgHuPON1Q192, tgHuPON1R192) expressing either human PON1Q192 or human PON1R192 on the PON1-/- C57/Bl6 background. The mice were subjected to chronic postnatal exposure to CPO (CPO).

Publication(s) associated with this dataset:

• Cole TB, Beyer RP, Bammler TK, Park SS, Farin FM, Costa LG, Furlong CE. 2011. Repeated developmental exposure of mice to chlorpyrifos oxon is associated with paraoxonase 1 (PON1)-modulated effects on cerebellar gene expression. Toxicol Sci 123:155-169. doi:10.1093/toxsci/kfr157 PMID:21673326 PMCID:PMC3164442

Project(s) associated with this dataset:

• University of Washington: Role of Paraoxonases (PONs) in Modulating Cadmium and Manganese Neurotoxicity