Zhou ChunBao;Rijun Wang;Lubin Ni;Dong Ha

2*, WANG Ri-jun1, NI Li-gang1, 2, HAN Da-yong1, 2

y1;sows;mrna;puberty;day;np

[Objective] To observe the disposition and localization of neturopetide Y-Y1(NPY-Y1) mRNA in hypothalamus, pituitary and ovary during puberty. [Method] Three 60-day-old Sujiang sows weighing 20 kg and three 160-day-old Sujiang sows weighing 80 kg were selected and anaesthetized. The hypothalamus, pituitary and ovary were taken out for preparation of frozen sections. The expression and localization of the NPY-Y1 mRNA in hypothalamus-pituitary-ovary axis was observed by the in situ hybridization. The PBS was substituted for hybridization solution to set up a control. [Result] Positive hybridization signals of the NPY-Y1 mRNA were detected in the hypothalamus, pituitary and ovary at different developmental stages, and these signals were stronger in the 60-day-old sows (before the puberty) than in the 160-day-old sows (during the puberty). [Conclusion] The NPY-Y1 mRNA is distributed in the hypothalamus-pituitary-ovary axis and can regulate reproductive process of sows.