title: Effect of lipopolysaccharide on circadian clock genes Per2 and Bmal1 in mouse ovary.
abstract: In mammals, circadian rhythms are associated with multiple physiological events. The aim of the present study was to examine the effect of lipopolysaccharide (LPS) on circadian systems in the ovary. Immature female mice were received an intra-peritoneal injection of equine chorionic gonadotropin (eCG) and LPS. Total RNA was collected from the ovary at 6-h intervals throughout a 48 h of experimental period. The expression of the circadian genes period 2 (Per2) and brain and muscle ARNT-like 1 (Bmal1) such as circadian genes was measured by quantitative PCR. Although expression of Per2 and Bmal1 in the ovary did not display clear diurnal oscillation, LPS suppressed the amplitude of Per2 expression. Additionally, LPS inhibited the expression of cytochrome P450 aromatase (CYP19) and luteinizing hormone receptor (LHr) genes in the ovary of eCG-treated mice. Our data suggest that Per2 may be associated with the inhibition of CYP19 and LHr expression by LPS in the ovaries of immature mice.
authors.affiliation: Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, 0808555, Japan. shimizut@obihiro.ac.jp.
authors.forename: Takashi
authors.initials: T
authors.lastname: Shimizu
authors.affiliation: Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, 0808555, Japan.
authors.forename: Kaya
authors.initials: K
authors.lastname: Watanabe
authors.affiliation: Graduate School of Animal and Food Hygiene, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, 0808555, Japan.
authors.forename: Nozomi
authors.initials: N
authors.lastname: Anayama
authors.affiliation: Biomedical Research Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, 3058568, Japan.
authors.forename: Koyomi
authors.initials: K
authors.lastname: Miyazaki
mesh_terms: D056930:ARNTL Transcription Factors / Q000235:genetics*; D000818:Animals; D001141:Aromatase / Q000235:genetics; D057906:Circadian Clocks / Q000187:drug effects*; D002940:Circadian Rhythm / Q000187:drug effects / Q000235:genetics; D005260:Female; D008070:Lipopolysaccharides / Q000494:pharmacology*; D051379:Mice; D008813:Mice, Inbred ICR; D010053:Ovary / Q000187:drug effects* / Q000378:metabolism*; D056950:Period Circadian Proteins / Q000235:genetics*
chemical_list: D056930:ARNTL Transcription Factors; C538961:Bmal1 protein, mouse; D008070:Lipopolysaccharides; C513312:Per2 protein, mouse; D056950:Period Circadian Proteins; D001141:Aromatase
keywords: Circadian rhythm; Lipopolysaccharide; Liver; Ovary