BMPR-IB gene disruption causes severe limb deformities in pigs  

作　　者：Qiang Yang Chuan-Min Qiao Wei-Wei Liu Hao-Yun Jiang Qi-Qi Jing Ya-Ya Liao Jun Ren Yu-Yun Xing 

机构地区：[1]State Key Laboratory of Pig Genetic Improvement and Production Technology,Jiangxi Agricultural University,Nanchang,Jiangxi 330045,China

出　　处：《Zoological Research》2022年第3期391-403,共13页动物学研究（英文）

基　　金：supported by the National Natural Science Foundation of China(31560304);National Key Research Programs of China(2016ZX08006-003)。

摘　　要：In an attempt to generate g.A746G substitution in the BMPR-IB gene,we unexpectedly obtained BMPR-IB homozygous knockout piglets(BMPR-IB^(-/-))and heterogeneous knockout piglets with one copy of the A746G mutation(BMPR-IB-/746G)via CRISPR/Cas9 editing.Polymerase chain reaction(PCR)and sequencing revealed complex genomic rearrangements in the target region.All BMPR-IBdisrupted piglets showed an inability to stand and walk normally.Both BMPR-IB^(-/-)and BMPR-IB-/746G piglets exhibited severe skeletal dysplasia characterized by distorted and truncated forearms(ulna,radius)and disordered carpal,metacarpal,and phalangeal bones in the forelimbs.The piglets displayed more severe deformities in the hindlimbs by visual inspection,including fibular hemimelia,enlarged tarsal bone,and disordered toe joint bones.Limb deformities were more profound in BMPR-IB^(-/-)piglets than in the BMPR-IB-/746G piglets.Proteomic analysis identified 139 differentially expressed proteins(DEPs)in the hindlimb fibula of BMPR-IB-/746G piglets compared to the wild-type(WT)controls.Most DEPs are involved in skeletal or embryonic development and/or the TGF-βpathway and tumor progression.Gene Ontology(GO)and protein domain enrichment analysis suggested alterations in these processes.Of the top 50 DEPs,a large proportion,e.g.,C1QA,MYO1H,SRSF1,P3H1,GJA1,TCOF1,RBM10,SPP2,MMP13,and PHAX,were significantly associated with skeletal development.Our study provides novel findings on the role of BMPR-IB in mammalian limb development.

关 键 词：BMPR-IB A746G PIGS Limb deformities 

分 类 号：S828.2[农业科学—畜牧学]