Transcriptional alteration of p53 related processes as a key factor for skeletal muscle characteristics in Sus scrofa.
The pig could be a useful model to characterize molecular aspects determining several delicate phenotypes because they have been bred for those characteristics. The Korean native pig (KNP) is a regional breed in Korea that was characterized by relatively high intramuscular fat content and reddish meat color compared to other western breeds such as Yorkshire (YS). YS grew faster and contained more lean muscle than KNP. We compared the KNP to Yorksire to find molecular clues determining muscle characteristics. The comparison of skeletal gene expression profiles between these two breeds showed molecular differences in muscle. We found 82 differentially expressed genes (DEGs) defined by fold change (more than 1.5 fold difference) and statistical significance (within 5% of false discovery rate). Functional analyses of these DEGs indicated up-regulation of most genes involved in cell cycle arrest, down-regulation of most genes involved in cellular differentiation and its inhibition, down-regulation of most genes encoding component of muscular-structural system, and up-regulation of most genes involved in diverse metabolism in KNP. Especially, DEGs in above-mentioned categories included a large number of genes encoding proteins directly or indirectly involved in p53 pathway. Our results indicated a possible role of p53 to determine muscle characteristics between these two breeds.
Kim
Seung-Soo
SS
College of Life Sciences and Biotechnology, Korea University, Seoul 136-701, Korea.
Kim
Jung-Rok
JR
Moon
Jin-Kyoo
JK
Choi
Bong-Hwan
BH
Kim
Tae-Hun
TH
Kim
Kwan-Suk
KS
Kim
Jong-Joo
JJ
Lee
Cheol-Koo
CK
D000273:Adipose Tissue / Q000473:pathology*; D000818:Animals; D001947:Breeding; D002454:Cell Differentiation / Q000235:genetics; D004041:Dietary Fats; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000502:physiology; D018816:Genes, cdc / Q000502:physiology*; D008297:Male; D008460:Meat; D018482:Muscle, Skeletal / Q000473:pathology / Q000502:physiology*; D013045:Species Specificity; D034421:Sus scrofa; D015533:Transcriptional Activation / Q000502:physiology*; D016159:Tumor Suppressor Protein p53 / Q000235:genetics / Q000378:metabolism*
D004041:Dietary Fats; D016159:Tumor Suppressor Protein p53