title: Discovery of porcine microRNAs and profiling from skeletal muscle tissues during development.
abstract: MiRNAs (microRNAs) play critical roles in many important biological processes such as growth and development in mammals. In this study, we identified hundreds of porcine miRNA candidates through in silico prediction and analyzed their expression in developing skeletal muscle using microarray. Microarray screening using RNA samples prepared from a 33-day whole embryo and an extra embryo membrane validated 296 of the predicted candidates. Comparative expression profiling across samples of longissimus muscle collected from 33-day and 65-day post-gestation fetuses, as well as adult pigs, identified 140 differentially expressed miRNAs amongst the age groups investigated. The differentially expressed miRNAs showed seven distinctive types of expression patterns, suggesting possible involvement in certain biological processes. Five of the differentially expressed miRNAs were validated using real-time PCR. In silico analysis of the miRNA-mRNA interaction sites suggested that the potential mRNA targets of the differentially expressed miRNAs may play important roles in muscle growth and development.
authors.affiliation: Key Laboratory of Agricultural Animal Genetics, Breeding, and Reproduction of Ministry of Education & Key Laboratory of Swine Genetics, Huazhong Agricultural University, Wuhan, People's Republic of China.
authors.forename: Ting-Hua
authors.initials: TH
authors.lastname: Huang
authors.forename: Meng-Jin
authors.initials: MJ
authors.lastname: Zhu
authors.forename: Xin-Yun
authors.initials: XY
authors.lastname: Li
authors.forename: Shu-Hong
authors.initials: SH
authors.lastname: Zhao
mesh_terms: D000465:Algorithms; D000818:Animals; D030541:Databases, Genetic; D020869:Gene Expression Profiling; D018507:Gene Expression Regulation, Developmental; D023281:Genomics; D035683:MicroRNAs; D005810:Multigene Family; D018482:Muscle, Skeletal / Q000378:metabolism*; D009693:Nucleic Acid Hybridization; D020411:Oligonucleotide Array Sequence Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017423:Sequence Analysis, RNA; D013552:Swine
chemical_list: D035683:MicroRNAs
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