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The effect of the intracervical application of follicle-stimulating hormone or luteinizing hormone on the pattern of expression of gonadotrophin receptors in the cervix of non-pregnant ewes.

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The effect of the intracervical application of follicle-stimulating hormone or luteinizing hormone on the pattern of expression of gonadotrophin receptors in the cervix of non-pregnant ewes.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Leethongdee, S. Khalid, M. Scaramuzzi, R. J.
Description	Country affiliation: Thailand Author Affiliation: Leethongdee S ( Faculty of Veterinary Sciences, Mahasarakham University, Amphur Muang, Mahasarakham, Thailand.)
Abstract	During the periovulatory period, the cervix relaxes in response to changes in circulating concentrations of reproductive hormones. The present study investigated the role of gonadotrophins in cervical function by examining the expression of follicle-stimulating hormone receptor (FSHR) and luteinizing hormone receptor (LHR) and their mRNAs following intracervical treatment with either FSH or LH. Eighteen ewes were assigned to four groups, and they were then treated with progestagen sponges and PMSG to synchronize their oestrous cycles. Intracervical treatments were given 24 h after sponge removal as follows: Group 1: FSH 2 mg; Group 2: LH 2 mg; Group 3: Vehicle and Group 4: Control. Cervices were collected 54 h after sponge removal and then divided into three regions. The expression of FSHR and LHR was determined by immunohistochemistry and FSHR mRNA and LH mRNA by in situ hybridization. The expression of LHR, FSHR and their respective mRNAs was compared in six tissue layers (luminal epithelium, subepithelial stroma, circular, longitudinal and transverse muscle and serosa) and in three cervical regions (vaginal, mid and uterine). The results showed that FSH increased transcription of the FSHR gene and the levels of its receptor, but only in subepithelial stroma of the cervix. FSH also increased the levels of LHR in the cervix, but only in the muscle layers. LH had no effect on the levels of FSHR despite the fact that it did increase the level of transcription of the FSHR gene and LH also increased the levels of its own receptor in the cervix, but only in the muscle layers, and this action was independent of increased levels of transcription of the LHR gene. These findings suggest multiple levels of regulation of cervical LH and FSH receptors and that the gonadotrophins may have a role in relaxation of the cervix during oestrus by regulating their own receptors.
File Format	HTM / HTML
ISSN	09366768
Issue Number	4
Volume Number	49
e-ISSN	14390531
Journal	Reproduction in Domestic Animals
Language	English
Publisher	Wiley
Publisher Date	2014-08-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Reproductive Medicine Discipline Veterinary Medicine Discipline Zoology Cervix Uteri Drug Effects Metabolism Follicle Stimulating Hormone Administration & Dosage Luteinizing Hormone Receptors, Fsh Genetics Receptors, Lh Animals Chemistry Estrus Synchronization Female Gene Expression Immunohistochemistry Veterinary In Situ Hybridization Rna, Messenger Sheep Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Endocrinology Biotechnology

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The effect of the intracervical application of follicle-stimulating hormone or luteinizing hormone on the pattern of expression of gonadotrophin receptors in the cervix of non-pregnant ewes.

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