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Yang LQ, Li J, Wang C, Wu QY, Chen XY, Lai SJ, Song TZ, Zhang M. Expression patterns of PPARγ2, PGC-1α, and MEF2C and their association with intramuscular fat content and skeletal muscle tenderness of crossbred Simmental bulls. CANADIAN JOURNAL OF ANIMAL SCIENCE 2019. [DOI: 10.1139/cjas-2017-0165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
PPARγ2, PGC-1α, and MEF2C play an important role in skeletal muscle development and fat deposition. This study aimed to determine their mRNA expression levels in longissimus dorsi (Ld), semitendinosus (Se), and soleus (Sol) muscles of crossbred Simmental bulls and estimate their association with intramuscular fat (IMF) content and meat shear force (MSF). We measured the muscle fiber (MF) density and area, IMF content, and MSF of 6-, 12-, and 36-mo-old bulls. We found that the expression patterns differed with age: the PPARγ2 expression in the three muscles of 36-mo-old bulls was greater than that in the muscles of 6- and 12-mo-old bulls (P < 0.05). Furthermore, PGC-1α expression in Sol of 36-mo-old and MEF2C expression in Ld of 12-mo-old bulls were higher than those in the respective muscles of 6- and 12-mo-old bulls, and 6- and 36-mo-old bulls, respectively (P < 0.05). The MF area, IMF content, and MSF increased with age (P < 0.05). The PPARγ2 mRNA expression in Ld, Se, and Sol was positively correlated with MF area and IMF content (P < 0.05) and negatively correlated with MF density (P < 0.05). Thus, PPARγ2 might be a candidate marker, which is positively correlated with IMF content and MF area.
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Affiliation(s)
- Li-Qin Yang
- College of Animal Science & Technology, Sichuan Agricultural University, Wenjiang, Chengdu 611130, People’s Republic of China
| | - Jian Li
- Institute of Animal Nutrition, Sichuan Agricultural University, Wenjiang, Chengdu 611130, People’s Republic of China
| | - Chun Wang
- College of Animal Science & Technology, Sichuan Agricultural University, Wenjiang, Chengdu 611130, People’s Republic of China
| | - Qiu-Ying Wu
- College of Animal Science & Technology, Sichuan Agricultural University, Wenjiang, Chengdu 611130, People’s Republic of China
| | - Xuan-Yu Chen
- College of Animal Science & Technology, Sichuan Agricultural University, Wenjiang, Chengdu 611130, People’s Republic of China
| | - Song-Jia Lai
- Institute of Animal Breeding and Genetic, Sichuan Agricultural University, Wenjiang, Chengdu 611130, People’s Republic of China
| | - Tian-Zeng Song
- Institute of Animal Science, Tibet Academy of Agricultural and Animal Husbandry Science, Lhasa, Tibet 850009, People’s Republic of China
| | - Ming Zhang
- College of Animal Science & Technology, Sichuan Agricultural University, Wenjiang, Chengdu 611130, People’s Republic of China
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