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Results for “ESTRUS CYCLE”

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At least 19 recordsLinked to original sources
PubMed2001

Identification and expression of a new sulfhydryl oxidase SOx-3 during the cell cycle and the estrus cycle in uterine cells.

Using differential hybridization of a guinea pig endometrial cell cDNA library, a potentially negatively estrogen-regulated gene, SOX-3, was isolated. According to the nucleotide and protein sequence similarities, SOx-3 belonged to the FAD-linked sulfhydryl oxidase family containing the egg white sulfhydryl oxidase, the rat seminal vesicle sulfhydryl oxidase-2 SOx-2, the quiescence-inducible protein hQ6. The SOX-3 transcript in the guinea pig as well as 5 different mRNAs in human tissues appeared differentially expressed in the tissues studied. In secondary endometrial cell culture, the SOX-3 mRNA level increased during a serum depletion-induced quiescence, decreased when cells enter the G1 phase after serum stimulation, and was restored during the S and G2/M phases. Thus, SOX-3 could be implicated in the negative cell cycle control. The SOx-3 protein appeared to be specific of epithelial cells in the uterus. Its expression level varied during the estrus cycle in the guinea pig, suggesting a regulation by steroid hormones.

Amino Acid Sequence↗
PubMedDate not supplied

Gustatory preferences during estrus cycle in rats.

Estrus cycle has been used as a base to study gustatory responses in rats under conditions of two-bottle choice test given for one hour daily, and the data pooled respectively for diestrus/metestrus (D/M) and proestrus/estrus (P/E). Glucose (13.5%), sodium saccharin (0.2%), sodium chloride (0.9%), citric acid (0.004%) and quinine sulphate (0.002%) was each paired with water and a particular solution was presented daily for one week. Two days gap was given between two different solutions when only water was made available in both the bottles. An increased preference for glucose and saccharin, decrease to sodium chloride and no change in citric acid and quinine sulphate was observed at P/E. The differential gustatory response is perhaps linked to the levels of ovarian and hypophyseal hormones at the time of ovulation.

Animals↗
PubMed1995

Induction of cyclooxygenase type-2 (COX-2) in rat endometrium at the peak of serum estradiol during the estrus cycle.

We investigated the induction of cyclooxygenase (COX) in rat endometrium during the estrus cycle. The estrus cycle was divided into five stages (proestrus, estrus, diestrus-1, diestrus-2, diestrus-3) by cytological observation of vaginal smears. COX-1 was detected in the endometrium during all five stages of the estrus cycle. In contrast, COX-2 in the endometrium was detectable only in three stages (diestrus-3, proestrus, estrus) and showed a peak at diestrus-3, coinciding with the peak in serum estradiol level, suggesting the estradiol-dependent induction of COX-2.

Animals↗