Abstract:
:Tissue stem cells may serve as progenitors for malignant tumors derived from the same tissue. Here, we report the establishment of immortalized human mesenchymal stem cells (ihMSC) and tested the feasibility of using ihMSC as presarcomatous cells. Immortalization was achieved by introducing the genes for human telomerase reverse transcriptase and Bmi1. ihMSC retained the potential for multi-directional differentiation of the original MSC. To transform ihMSC, we introduced an oncogenic H-ras(Val12) gene, and established the cell line ihMSC-ras. ihMSC-ras had the phenotype of fully transformed cells and retained adipogenic and chondrogenic, but not osteogenic, potential. Interestingly, ihMSC-ras demonstrated morphological features of autophagy, and inhibition of the ERK pathway suppressed the production of autophagosomes, indicating that ras/ERK signaling is responsible for the induction of autophagy. Thus ihMSC will serve as a material with which to analyze the tumorigenic and differentiation-modifying effects of candidate oncogenes involved in the development of sarcomas.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Shima Y,Okamoto T,Aoyama T,Yasura K,Ishibe T,Nishijo K,Shibata KR,Kohno Y,Fukiage K,Otsuka S,Uejima D,Nakayama T,Nakamura T,Kiyono T,Toguchida Jdoi
10.1016/j.bbrc.2006.11.137subject
Has Abstractpub_date
2007-02-02 00:00:00pages
60-6issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(06)02591-5journal_volume
353pub_type
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