Cloning and Characterization of New Splice Variants of Insulin-Like Growth Factor-1 Gene in Songliao Black Pig
文献类型: 外文期刊
作者: Liu, Chang 1 ; Zhaoa, Zhihui 1 ; Bai, Wenlin 1 ; Sun, Boxing 1 ; Zhang, Yonghong 1 ; Yang, Runjun 1 ;
作者机构: 1.Jilin Univ, Coll Anim Sci & Vet Med, Changchun 130062, Jilin, Peoples R China
2.Shandong Acad Agr Sci, Inst Anim Sci & Vet Med, Jinan 250100, Shandong, Peoples R China
3.Shenyang Agr Univ, Coll Anim Sci & Vet Med, Shenyang 110866, Liaoning, Peoples R China
关键词: Insulin-Like Growth Factor 1 (IGF-1);alternative splicing;Songliao Black pig;tissues;expression
期刊名称:JOURNAL OF ANIMAL AND VETERINARY ADVANCES ( 影响因子:0.365; 五年影响因子:0.359 )
ISSN: 1680-5593
年卷期: 2012 年 11 卷 17 期
页码:
收录情况: SCI
摘要: Insulin-Like Growth Factor 1 (IGF-1) is a single copy gene. It generates several IGF-1 mRNA variants due to alternative splicing. Spliced variants of IGF-1 being some small peptides derived from spliced variants of IGF-1 have critical roles in cell metabolism and growth of various vertebrate species. Porcine IGF-1 gene has two promoters and the existence of Exon 6 has been confirmed in Songliao Black pig in the laboratory. The aims of the present study were to identify new spliced variants of IGF-1 gene including Exon 5 and to investigate their expression profile in different tissues of Songliao Black pig. The cDNAs of two new spliced variants of IGF-1 gene were cloned by RACE. These two variants were named Class I IGF-1-Eb and Class II IGF-1-Eb, respectively. The Class I IGF-1-Eb contains an Open Reading Frame (ORE) of 564 bp encoding 187 amino acids (GenBank Accession No. FJ91 44971. The Class II IGF-1-Eb contains an ORE of 516-bp encodnig. 171 amino acids (GenBank Accession No. FJ91 4498). Tissue distributions of mRNAs of Class I IGF-1-Eb and Class II IGF-1-Eb were investigated in Songliao Black pig by semi-quantitative RT-PCR. Both of the new mRNA variants were expressed in a variety of tissues. Class I IGF-1-Eb mRNA was more abundant than Class II IGF-1-Eb mRNA in most tissues except for duodenum and longissimus muscle (p<0.05).
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