Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Global gene expression profiling of FOP- or resFOP-iMSCs after chondrogenic differentiation

ABSTRACT: Comparison of gene expressions among FOP- or resFOP-iMSCs after chondrogenic differentiation with or without Activin-A. Comparison of gene expressions among FOP- or resFOP-iMSCs after chondrogenic differentiation with or without Activin-A.

ORGANISM(S): Homo sapiens

SUBMITTER: Makoto Ikeya

PROVIDER: E-GEOD-69459 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Neofunction of ACVR1 in fibrodysplasia ossificans progressiva.

Hino Kyosuke K Ikeya Makoto M Horigome Kazuhiko K Matsumoto Yoshihisa Y Ebise Hayao H Nishio Megumi M Sekiguchi Kazuya K Shibata Mitsuaki M Nagata Sanae S Matsuda Shuichi S Toguchida Junya J

Proceedings of the National Academy of Sciences of the United States of America 20151130 50

Fibrodysplasia ossificans progressiva (FOP) is a rare genetic disease characterized by extraskeletal bone formation through endochondral ossification. FOP patients harbor point mutations in ACVR1 (also known as ALK2), a type I receptor for bone morphogenetic protein (BMP). Two mechanisms of mutated ACVR1 (FOP-ACVR1) have been proposed: ligand-independent constitutive activity and ligand-dependent hyperactivity in BMP signaling. Here, by using FOP patient-derived induced pluripotent stem cells (F ...[more]

PMID: 26621707

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Project description:Mutations in the RMRP gene are the origin of cartilage-hair hypoplasia. Cartilage-hair hypoplasia is associated with severe dwarfism caused by impaired skeletal development. However, it is not clear why mutations in the RMRP gene lead to skeletal dysplasia. Viperin is a known substrate of RMRP. Since chondrogenic differentiation of the growth plate is required for development of the long bones, we hypothesized that viperin functions as a chondrogenic regulator downstream of RMRP. Viperin protein is expressed throughout the stages of chondrogenic differentiation in vivo. Viperin gene expression is increased during knockdown of Rmrp RNA in the ATDC5 model for chondrogenic differentiation. Viperin is expressed during ATDC5 chondrogenic differentiation. Viperin knockdown reduces, while viperin overexpression increases overall protein secretion, with CXCL10 identified as a potential target via mass spectrometry-proteomics. CXCL10 protein expression is reduced during knockdown and increased during overexpression of viperin and CXCL10 protein expression coincides with viperin expression in ATDC5 chondrogenic differentiation. Viperin knockdown induces, while viperin overexpression reduces TGFβ activity. Furthermore, viperin knockdown conditioned media increases, while viperin overexpression conditioned media reduces chondrogenic differentiation of ATDC5 cells. TGFβ target genes Pai1 and Smad7 are increased during knockdown and reduced during overexpression of viperin. Moreover, TGFβ activity is reduced when differentiating ATDC5 cells are exposed to CXCL10 and, acting as a viperin overexpression mimic, CXCL10 similarly reduces chondrogenic differentiation of ATDC5. Lastly, we show that in CHH patient cells, RMRP expression is reduced and viperin expression is increased, coinciding with reduced chondrogenic differentiation and increased CXCL10 expression, possibly explaining the CHH phenotype. Together our data show that viperin may play a pivotal role in chondrogenic differentiation, with potential consequences for cartilage-hair hypoplasia pathobiology.

Dataset Information

Global gene expression profiling of FOP- or resFOP-iMSCs after chondrogenic differentiation

Publications

Neofunction of ACVR1 in fibrodysplasia ossificans progressiva.

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