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Porcine IGF-1R synonymous mutations in the intracellular domain affect cell proliferation and alter kinase activity.

Abstract：

:Miniature pigs are regarded as ideal organ donors for xenotransplantation into humans. Elucidating the formation mechanism of miniature pigs is important. The insulin-like growth factor 1 receptor (IGF-1R) is crucial in the regulation of cell proliferation and organismal growth. According to our previous research, the IGF-1R expression levels between large and miniature pigs showed different profiles in liver and muscle tissues. Here, five synonymous mutations of IGF-1R in the coding sequence (CDS) of intracellular domain (ICD) between large and miniature pigs were analysed by constructing expression vectors of two haplotypes and named pcDNA3.1-LP (with the CDS of IGF-1R ICD of Large White pigs, LP group) and pcDNA3.1-BM (with the CDS of IGF-1R ICD of Bama Xiang pigs, BM group). The IGF-1R of the BM group was expressed lower than that of the LP group in transcription, translation and autophosphorylation levels. The IGF-1R of the BM group also down-regulated the protein levels of p-AKT/p-ERK than that of the LP group. PK-15 and C2C12 cell proliferation were detected to further understand the function of the haplotype. Results showed that the proliferation viability of PK-15 and C2C12 cells weakened in the BM group. Moreover, the mRNA and protein stabilities of the BM group were higher than those of the LP group. Our data indicated that two haplotypes of IGF-1R CDS in ICD between large and miniature pigs altered IGF-1R expression and down-regulated AKT and ERK signalling pathways at translation levels, resulting in an inhibitory effect on PK-15 and C2C12 cell proliferation.

journal_name

Int J Biol Macromol

journal_title

International journal of biological macromolecules

authors

Wang C,Liu S,Wu Q,Cheng Y,Feng T,Song J,Yang R,Geng H,Lu G,Wang S,Hao L

doi

10.1016/j.ijbiomac.2020.02.281

subject

Has Abstract

pub_date

2020-06-01 00:00:00

pages

147-153

eissn

0141-8130

issn

1879-0003

pii

S0141-8130(19)38256-X

journal_volume

152

pub_type

杂志文章

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