PMID- 25736782 OWN - NLM STAT- MEDLINE DCOM- 20160418 LR - 20150703 IS - 1615-9861 (Electronic) IS - 1615-9853 (Linking) VI - 15 IP - 13 DP - 2015 Jul TI - Proteomic and network analysis of proteins regulated by REX1 in human embryonic stem cells. PG - 2220-9 LID - 10.1002/pmic.201400510 [doi] AB - Recent studies have suggested that REX1 (reduced expression 1) plays an important role in pluripotency, proliferation, and differentiation. However, the molecular mechanisms involved in REX1-dependent regulation of diverse cellular processes remain unclear. To elucidate the regulatory functions of REX1 in human embryonic stem cells (hESCs), comparative proteomic analysis was performed on REX1 RNAi specifically silenced hESCs. Analysis of the proteome via nano-LC-MS/MS identified 140 differentially expressed proteins (DEPs) displaying a >2-fold difference in expression level between control and REX1 knockdown (KD) hESCs, which were then compared with transcriptome data and validated by quantitative real-time RT-PCR and Western blotting. These DEPs were analyzed by GO, pathway, and functional clustering analyses to determine the molecular functions of the proteins and pathways regulated by REX1. The REX1 KD-mediated DEPs mapped to major biological processes involved in the regulation of ribosome-mediated translation and mitochondrial function. Functional network analysis revealed a highly interconnected network among these DEPs and indicated that these interconnected proteins are predominantly involved in translation and the regulation of mitochondrial organization. These findings regarding REX1-mediated regulatory network have revealed the contributions of REX1 to maintaining the status of hESCs and have improved our understanding of the molecular events that underlie the fundamental properties of hESCs. CI - (c) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. FAU - Son, Mi-Young AU - Son MY AD - Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Gwahangno, Yuseong-gu, Daejeon, Republic of Korea. AD - Department of functional genomics, University of Science & Technology, Gajungro, Yuseong-gu, Daejeon, Republic of Korea. FAU - Kwak, Jae Eun AU - Kwak JE AD - Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Gwahangno, Yuseong-gu, Daejeon, Republic of Korea. FAU - Kim, Young-Dae AU - Kim YD AD - Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Gwahangno, Yuseong-gu, Daejeon, Republic of Korea. FAU - Cho, Yee Sook AU - Cho YS AD - Stem Cell Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Gwahangno, Yuseong-gu, Daejeon, Republic of Korea. AD - Department of functional genomics, University of Science & Technology, Gajungro, Yuseong-gu, Daejeon, Republic of Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150423 PL - Germany TA - Proteomics JT - Proteomics JID - 101092707 RN - 0 (Kruppel-Like Transcription Factors) RN - 0 (ZFP42 protein, human) SB - IM CIN - Proteomics. 2015 Jul;15(13):2147-9. PMID: 26058466 MH - Blotting, Western MH - Human Embryonic Stem Cells/*metabolism MH - Humans MH - Kruppel-Like Transcription Factors/genetics/*metabolism MH - *Proteomics MH - RNA Interference OTO - NOTNLM OT - Cell biology OT - Human embryonic stem cells OT - Pluripotency OT - Quantitative proteomics OT - REX1 EDAT- 2015/03/05 06:00 MHDA- 2016/04/19 06:00 CRDT- 2015/03/05 06:00 PHST- 2014/10/31 00:00 [received] PHST- 2015/01/19 00:00 [revised] PHST- 2015/02/26 00:00 [accepted] PHST- 2015/03/05 06:00 [entrez] PHST- 2015/03/05 06:00 [pubmed] PHST- 2016/04/19 06:00 [medline] AID - 10.1002/pmic.201400510 [doi] PST - ppublish SO - Proteomics. 2015 Jul;15(13):2220-9. doi: 10.1002/pmic.201400510. Epub 2015 Apr 23.