The developmental changes and effect on IMF content of H-FABP and PPARgamma mRNA expression in sheep muscle.
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.
Huang
Zhi-Guo
ZG
College of Animal Science and Technology, Nanjing Agricultural University, China.
Xiong
Li
L
Liu
Zhen-Shan
ZS
Qiao
Yong
Y
Liu
Shou-Ren
SR
Ren
Hang-Xing
HX
Xie
Zhuang
Z
Liu
Guo-Qing
GQ
Li
Xue-Bin
XB
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
C493408:FABP3 protein, human; D000074026:Fatty Acid Binding Protein 3; D050556:Fatty Acid-Binding Proteins; D047495:PPAR gamma; D012333:RNA, Messenger