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Suncus murinus murinus strain:Jic:SUN-Her

ABSTRACT: Whole Transcriptome Analysis in the Brainstem in Shrew Model of Postoperative Nausea and Vomiting:

PROVIDER: PRJDB11254 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	DRR277177_1.fastq.gz	Fastqsanger.gz
	DRR277177_2.fastq.gz	Fastqsanger.gz
	DRR277178_1.fastq.gz	Fastqsanger.gz
	DRR277178_2.fastq.gz	Fastqsanger.gz
	DRR277179_1.fastq.gz	Fastqsanger.gz

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Suncus murinus murinus strain:Jic:SUN-Her

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Project description:The present study established techniques to induce pseudopregnancy, in vitro oocyte cultures from pronuclear to 2- to 4-cell stages, and embryo transfer in musk shrews, a reflex ovulator. Offspring were subsequently obtained by transferring in vivo-developed or in vitro-cultured embryos. Female musk shrews received human chronic gonadotropin (hCG), with or without mating stimuli, from vasectomized males to produce pseudopregnant recipients. Embryos at the 2- to 4-cell stage were collected 44-48 h after mating. Another set of embryos was collected 26-27 h after mating and then cultured for 20 h from the pronuclear to 2- to 4-cell stages. Subsequently, embryos were transferred into the oviducts of pseudopregnant recipients 24 or 48 h after the induction of pseudopregnancy. Offsprings were successfully obtained from recipients that received hCG 24 h before embryo transfer, regardless of mating stimuli. These techniques may be valuable for producing transgenic musk shrews.

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Suncus murinus strain:Ous:KAT-227c

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Kisspeptin neurons mediate reflex ovulation in the musk shrew (Suncus murinus).

Project description:The present study investigated whether kisspeptin-G protein-coupled receptor 54 (GPR54) signaling plays a role in mediating mating-induced ovulation in the musk shrew (Suncus murinus), a reflex ovulator. For this purpose, we cloned suncus Kiss1 and Gpr54 cDNA from the hypothalamus and found that suncus kisspeptin (sKp) consists of 29 amino acid residues (sKp-29). Injection of exogenous sKp-29 mimicked the mating stimulus to induce follicular maturation and ovulation. Administration of several kisspeptins and GPR54 agonists also induced presumed ovulation in a dose-dependent manner, and Gpr54 mRNA was distributed in the hypothalamus, showing that kisspeptins induce ovulation through binding to GPR54. The sKp-29-induced ovulation was blocked completely by pretreatment with a gonadotropin-releasing hormone (GnRH) antagonist, suggesting that kisspeptin activates GnRH neurons to induce ovulation in the musk shrew. In addition, in situ hybridization revealed that Kiss1-expressing cells are located in the medial preoptic area (POA) and arcuate nucleus in the musk shrew hypothalamus. The number of Kiss1-expressing cells in the POA or arcuate nucleus was up-regulated or down-regulated by estradiol, suggesting that kisspeptin neurons in these regions were the targets of the estrogen feedback action. Finally, mating stimulus largely induced c-Fos expression in Kiss1-positive cells in the POA, indicating that the mating stimulus activates POA kisspeptin neurons to induce ovulation. Taken together, these results indicate that kisspeptin-GPR54 signaling plays a role in the induction of ovulation in the musk shrew, a reflex ovulator, as it does in spontaneous ovulators.

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