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Li B, Weng Q, Dong C, Zhang Z, Li R, Liu J, Jiang A, Li Q, Jia C, Wu W, Liu H. A Key Gene, PLIN1, Can Affect Porcine Intramuscular Fat Content Based on Transcriptome Analysis. Genes (Basel) 2018; 9:genes9040194. [PMID: 29617344 PMCID: PMC5924536 DOI: 10.3390/genes9040194] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/22/2018] [Accepted: 03/27/2018] [Indexed: 12/20/2022] Open
Abstract
Intramuscular fat (IMF) content is an important indicator for meat quality evaluation. However, the key genes and molecular regulatory mechanisms affecting IMF deposition remain unclear. In the present study, we identified 75 differentially expressed genes (DEGs) between the higher (H) and lower (L) IMF content of pigs using transcriptome analysis, of which 27 were upregulated and 48 were downregulated. Notably, Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis indicated that the DEG perilipin-1 (PLIN1) was significantly enriched in the fat metabolism-related peroxisome proliferator-activated receptor (PPAR) signaling pathway. Furthermore, we determined the expression patterns and functional role of porcine PLIN1. Our results indicate that PLIN1 was highly expressed in porcine adipose tissue, and its expression level was significantly higher in the H IMF content group when compared with the L IMF content group, and expression was increased during adipocyte differentiation. Additionally, our results confirm that PLIN1 knockdown decreases the triglyceride (TG) level and lipid droplet (LD) size in porcine adipocytes. Overall, our data identify novel candidate genes affecting IMF content and provide new insight into PLIN1 in porcine IMF deposition and adipocyte differentiation.
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Affiliation(s)
- Bojiang Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Qiannan Weng
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Chao Dong
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Zengkai Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Rongyang Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Jingge Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Aiwen Jiang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Qifa Li
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Chao Jia
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Wangjun Wu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
| | - Honglin Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China.
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Guo H, Liu WS, Takasuga A, Eyer K, Landrito E, Xu SZ, Gao X, Ren HY. Mapping, expression, and association study of the bovine PSMC1 gene. Biochem Genet 2008; 46:347-55. [PMID: 18247114 DOI: 10.1007/s10528-008-9151-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Accepted: 11/16/2007] [Indexed: 11/27/2022]
Abstract
The 26S ATP-dependent protease is composed of a 20S catalytic proteasome and two PA700 regulatory modules; it plays a central role in many regulatory pathways, such as cell cycle regulation, differentiation, and apoptosis. The PA700 complex is composed of multiple subunits, including at least six related ATPases and approximately 15 non-ATPase polypeptides. PSMC1 (proteasome 26S subunit, ATPase, 1) is one of these ATPases. In this study, we amplified a fragment of 507 bp from intron 9 of the bovine PSMC1 gene and found a SNP (G/A) at position 216 in the PCR fragment. Genotyping of 138 animals from four beef breeds revealed that the average frequency for allele A (G-base) was 0.4271 (0.3269-0.5517); for allele B (A-base) it was 0.5729 (0.4483-0.6731). This SNP is significantly associated with average daily feed intake (P < 0.01), average daily gain, finishing average daily gain, body length, ratio of feed to meat, backfat thickness, and loin-muscle area (P < 0.05). Our experimental data showed that animals with an AA genotype have a significantly lower food intake, grow faster, are longer in the body, and have less backfat and bigger loin muscle; hence, their ratio of feed to meat is significantly lower. We believe that the PSMC1 SNP is a potential candidate marker for marker-assisted selection in these traits. We also found that the bovine PSMC1 gene was expressed mainly in lung, testis, and spleen. In addition, we mapped the bovine PSMC1 gene on BTA10 by an RH mapping method.
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Affiliation(s)
- H Guo
- Laboratory of Molecular Biology and Bovine Breeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100094, P.R. China
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