[Relative quantification of mRNA transcription of Cry1 in different tissues of sheep in oestrous cycle by real-time quantitative PCR].
Studies have shown that clock gene Cry1 may have important roles in the endocrine process of seasonal reproduction in mammals. In this study, Duolang sheep (non-seasonal reproduction sheep breed) and Chinese Merino (seasonal reproduction sheep breed) were used to determine the expression change of Cry1 in hypothalamus-pituitary-ovary axis in different stage of estrous cycle by quantitative real-time PCR. The results showed that the Cry1 mRNA was expressed in all tested tissues, in which the expression levels in pineal gland and thyroid gland were higher than in other tissues. As far as different sheep breeds were concerned, the tissue expression profiles of Cry1 at different stage of estrous cycle were broadly similar. Besides hypothalamus, the expression levels of Cry1 in ovary, uterus, pineal gland, pituitary gland, and thyroid gland were all reached to peak in proestrus. The differences of expression change extent for Cry1 in vary, uterus, pineal gland, and pituitary gland in proestrus and oestrus were significant between different sheep breeds. The results suggested that Cry1 may play roles in switching on the estrus and seasonal reproduction.
Xinjiang Academy of Agricultural and Reclamation Science, Shihezi, China. w.n007@163.com
Lei
L
Gao
Shang-Quan
SQ
Gan
Jin-Quan
JQ
Yang
Jian-Bo
JB
Yang
Yao-Wei
YW
Liang
Aini Nula Hong
AN
Abdulla
Min
M
Shen
D000818:Animals; D056931:Cryptochromes / Q000235:genetics* / Q000378:metabolism; D030762:Estrous Cycle; D005260:Female; D007031:Hypothalamus / Q000378:metabolism*; D008297:Male; D010053:Ovary / Q000378:metabolism*; D010902:Pituitary Gland / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics* / Q000378:metabolism; D060888:Real-Time Polymerase Chain Reaction; D012756:Sheep / Q000235:genetics* / Q000502:physiology; D014158:Transcription, Genetic
D056931:Cryptochromes; D012333:RNA, Messenger