PMID- 22622142 OWN - NLM STAT- MEDLINE DCOM- 20120924 LR - 20220321 IS - 1878-5905 (Electronic) IS - 0142-9612 (Linking) VI - 33 IP - 24 DP - 2012 Aug TI - Reprogramming of human fibroblasts into multipotent cells with a single ECM proteoglycan, fibromodulin. PG - 5821-31 LID - 10.1016/j.biomaterials.2012.04.049 [doi] AB - Pluripotent and/or multipotent stem cell-based therapeutics are a vital component of tissue engineering and regenerative medicine. The generation or isolation of safer and readily available stem cell sources will significantly aid clinical applications. We report here a technique using a single molecule, recombinant human fibromodulin protein (FMOD), to reprogram human fibroblasts into multipotent cells. Like virally-induced pluripotent stem (iPS) cells, FMOD reprogrammed (FReP) cells express pluripotency markers, form embryoid bodies (EBs), and differentiate into ectoderm, mesoderm, and endoderm derivatives in vitro. Notably, FReP cells regenerate muscle and bone tissues but do not generate teratomas in vivo. Unlike iPS cells, undifferentiated FReP cells proliferate slowly and express low proto-oncogene c-MYC and unexpectedly high levels of cyclin-dependent kinase inhibitors p15(Ink4B) and p21(WAF1/Cip1). Remarkably, in a fashion reminiscent of quiescent stem cells, the slow replicative phenotype of undifferentiated FReP cells reverses after differentiation induction, with differentiating FReP cells proliferating faster and expressing less p15(Ink4B) and p21(WAF1/Cip1) than differentiating iPS cells. Overall, single protein, FMOD-based, cell reprograming bypasses the risks of mutation, gene instability, and malignancy associated with genetically-modified iPS cells, and provides an alternative strategy for engineering patient-specific multipotent cells for basic research and therapeutic application. CI - Published by Elsevier Ltd. FAU - Zheng, Zhong AU - Zheng Z AD - Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, University of California, Los Angeles, CA 90095-1759, USA. FAU - Jian, Jia AU - Jian J FAU - Zhang, Xinli AU - Zhang X FAU - Zara, Janette N AU - Zara JN FAU - Yin, Wei AU - Yin W FAU - Chiang, Michael AU - Chiang M FAU - Liu, Yi AU - Liu Y FAU - Wang, Joyce AU - Wang J FAU - Pang, Shen AU - Pang S FAU - Ting, Kang AU - Ting K FAU - Soo, Chia AU - Soo C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120521 PL - Netherlands TA - Biomaterials JT - Biomaterials JID - 8100316 RN - 0 (Extracellular Matrix Proteins) RN - 0 (FMOD protein, human) RN - 0 (MAS1 protein, human) RN - 0 (Proteoglycans) RN - 0 (Proto-Oncogene Mas) RN - 126468-95-9 (Fibromodulin) SB - IM MH - Adult MH - Bone and Bones/cytology MH - Cell Differentiation MH - Cell Line MH - Cell Proliferation MH - Cells, Cultured MH - *Cellular Reprogramming MH - Extracellular Matrix Proteins/*metabolism MH - Fibroblasts/*cytology/*metabolism MH - Fibromodulin MH - Gene Expression Profiling MH - Humans MH - Induced Pluripotent Stem Cells/cytology/metabolism MH - Infant, Newborn MH - Muscle, Skeletal/cytology MH - Proteoglycans/*metabolism MH - Proto-Oncogene Mas EDAT- 2012/05/25 06:00 MHDA- 2012/09/25 06:00 CRDT- 2012/05/25 06:00 PHST- 2012/04/10 00:00 [received] PHST- 2012/04/21 00:00 [accepted] PHST- 2012/05/25 06:00 [entrez] PHST- 2012/05/25 06:00 [pubmed] PHST- 2012/09/25 06:00 [medline] AID - S0142-9612(12)00488-7 [pii] AID - 10.1016/j.biomaterials.2012.04.049 [doi] PST - ppublish SO - Biomaterials. 2012 Aug;33(24):5821-31. doi: 10.1016/j.biomaterials.2012.04.049. Epub 2012 May 21.