Ling YANG, Xiaolei YAO, Xiaoyong CHEN, Shengqin ZANG, Hongxin SUN, Jia Yue LIU, Weitao DUN

Expression of Follicle-stimulating Hormone, Luteotropic Hormone, Estrogen and Progesterone Receptors in Ovary, Oviduct and Endometrium After Estrus Induction in Ewe

Induction of estrus is an effctive management tool for increasing the pregnancy rate in ewes, and there is a long estrus interval after lambing in spring in Small-tail Han ewe. In this study, norgestrel releasing intra-vaginal devices (PRID) and PRID + pregnant mare serum gonadotrophin (PMSG) were used for estrus induction in Small-tail Han ewe, and expression of follicle-stimulating hormone receptor (FSHR), luteinizing hormone receptor (LHR), estrogen receptor (ER) and progesterone receptor (PGR) mRNA in the ovarial stroma, oviduct ampulla and endometrium was analyzed by quantitative real-time PCR. The results showed that the estrus-induction with PRID and PRID + PMSG almost had the same effcts on increasing the percentage of animals in estrus and conception rate of the ewes, and the estrus-induction had no significant effct on the expression of LHR, ER and PGR mRNA in the oviduct ampulla, ovarial stroma and endometrium, and FSHR in the ovarial stroma and endometrium. Furthermore, the estrus-induction could significantly decrease the expression of FSHR mRNA in the ovine oviduct ampulla (P

Koyunlarda Östrus İndüksiyonu Sonrası Ovaryum, Oviduct ve Endometriyumda Folikül Uyarıcı Hormon, Luteotropik Hormon, Östrojen ve Progesteron Reseptör Ekspresyonu

Östrusun indüksiyonu, koyunlarda gebelik oranını artırmak için etkili bir yönetim aracıdır ve kısa kuyruklu Han koyununda ilkbaharda kuzulamanın ardından uzun bir östrus aralığı söz konusudur. Bu çalışmada, kısa kuyruklu Han koyunlarında östrus uyarımı için intravaginal salınan norgestrel (PRID) ve PRID + gebe kısrak serum gonadotropini (PMSG) kullanıldı. Ovidukt ampullası, ovaryum stroması ve endometriyumdaki folikül uyarıcı hormon reseptörü (FSHR), luteinleştirici hormon reseptörü (LHR), östrojen reseptörü (ER) ve progesteron reseptörü (PGR) mRNA ekspresyonu düzeyleri kantitatif real-time PCR ile analiz edildi. Sonuçlar, koyunlarda PRID ve PRID+PMSG ile östrus indüksiyonunun, östrustaki hayvan yüzdesi ve konsepsiyon oranını arttırmada neredeyse aynı etkilere sahip olduğunu ve östrus indüksiyonunun ovidukt ampullası, ovaryum stroması ve endometriyumdaki LHR, ER ve PGR mRNA ekspresyonu ile ovaryum stroması ve endometriyumdaki FSHR üzerinde anlamlı bir etkisi olmadığını gösterdi. Bunun yanısıra, östrus indüksiyonunun, koyunlarda ovidukt ampullasında FSHR mRNA’nın ekspresyonunu önemli ölçüde azaltabileceği belirlendi (P

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