title: Molecular characterization, chromosomal localization, expression profile and association analysis with carcass traits of the porcine dickkopf homolog1 gene.
abstract: DKK1 (dickkopf homolog 1) is a potent inhibitor of the canonical Wnt/β-cantenin signalling pathway, which plays a pivotal role in myogenesis, adipogenesis, and many other crucial biological processes. In this study, DKK1 was assigned to porcine 14q25-26 by using the radiation hybrid (IMpRH) panel. A G1757A single nucleotide polymorphism site by Csp6I PCR-RFLP was identified. Association analysis showed that different genotypes were associated with loin muscle area (P = 0.0281). Semi-quantitative-RT-PCR analysis revealed that DKK1 was highly expressed in spleen and lymph node at two developmental stages, while in skeletal muscle, further real-time PCR quantified that DKK1 was down-regulated in Large White pigs compared to Tongcheng pigs, accompanied by the down-regulation of CTTNB1 and TCF4, the up-regulation of LRP6, suggesting that the phenotypic difference between lean and obese pigs might be correlated with the activity of Wnt/β-cantenin signalling pathway.
authors.affiliation: Lab of Molecular Biology and Animal Breeding, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China.
authors.forename: Chuxin
authors.initials: C
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: Gao
authors.forename: Shanli
authors.initials: S
authors.lastname: Zhai
authors.forename: Bang
authors.initials: B
authors.lastname: Liu
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D033481:Chromosomes, Mammalian / Q000235:genetics*; D019295:Computational Biology; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D056726:Genetic Association Studies; D005838:Genotype; D036341:Intercellular Signaling Peptides and Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D008460:Meat; D008969:Molecular Sequence Data; D018482:Muscle, Skeletal / Q000378:metabolism; D010641:Phenotype; D010802:Phylogeny; D020641:Polymorphism, Single Nucleotide / Q000235:genetics; D019655:Quantitative Trait, Heritable; D034421:Sus scrofa / Q000235:genetics*
chemical_list: D036341:Intercellular Signaling Peptides and Proteins