title: The developmental changes and effect on IMF content of H-FABP and PPARgamma mRNA expression in sheep muscle.
abstract: Male Kazak sheep and Xinjiang fine wool sheep of different ages were selected to investigate the developmental changes and effect on intramuscular fat (IMF) content of heart fatty acid-binding protein (H-FABP) and peroxisome proliferator-activated receptor gamma (PPARgamma) mRNA expression in muscle. Longissimus dorsal muscle was sampled to measure IMF content; and total RNA was extracted to determine H-FABP and PPARgamma mRNA expression levels by real-time PCR. The results showed that: (1) The IMF content increased continuously with growing and showed significant differences (P<0.05) between ages in male Kazak sheep, but no such differences (P>0.05) existed in Xinjiang fine wool sheep. Furthermore, the IMF content in Kazak sheep was very much higher (P<0.01) than that of the other breed from day 30 to 90; (2) H-FABP mRNA expression level was the highest on day 2 and showed significant differences (P<0.05) between ages in male Kazak sheep as well as in Xinjiang fine wool sheep. In the former breed, the expression reached the lowest point at day 30, and then rose continuously. But in the latter breed, it declined continuously from day 2 to 90, and then increased; (3) Significant differences (P<0.05) of PPARgamma mRNA expression between ages occurred in both breeds. In male Kazak sheep, PPARgamma mRNA expression declined from day 2 to 90, while in the other breed it increased continuously from day 2 to 60, but reached the lowest level at day 90, then increased; (4) In male Kazak sheep, the mRNA expression level of H-FABP was highly positively correlated (r=0.737, P<0.01) with IMF content from day 30 to 90, but that of PPARgamma was highly negatively correlated (r=-0.835, P<0.01) with IMF content from day 2 to 90.
authors.affiliation: College of Animal Science and Technology, Nanjing Agricultural University, China.
authors.forename: Zhi-Guo
authors.initials: ZG
authors.lastname: Huang
authors.forename: Li
authors.initials: L
authors.lastname: Xiong
authors.forename: Zhen-Shan
authors.initials: ZS
authors.lastname: Liu
authors.forename: Yong
authors.initials: Y
authors.lastname: Qiao
authors.forename: Shou-Ren
authors.initials: SR
authors.lastname: Liu
authors.forename: Hang-Xing
authors.initials: HX
authors.lastname: Ren
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Xie
authors.forename: Guo-Qing
authors.initials: GQ
authors.lastname: Liu
authors.forename: Xue-Bin
authors.initials: XB
authors.lastname: Li
mesh_terms: D000818:Animals; D000074026:Fatty Acid Binding Protein 3; D050556:Fatty Acid-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D008297:Male; D024510:Muscle Development / Q000502:physiology*; D009132:Muscles / Q000378:metabolism* / Q000502:physiology; D047495:PPAR gamma / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000378:metabolism; D012756:Sheep
chemical_list: C493408:FABP3 protein, human; D000074026:Fatty Acid Binding Protein 3; D050556:Fatty Acid-Binding Proteins; D047495:PPAR gamma; D012333:RNA, Messenger