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  • c-Myc Inhibitor 10074-G5 Induces Murine and Human Hematopoietic Stem and Progenitor Cell Expansion and HDR Modulator Rad51 Expression.

c-Myc Inhibitor 10074-G5 Induces Murine and Human Hematopoietic Stem and Progenitor Cell Expansion and HDR Modulator Rad51 Expression.

Current cancer drug targets (2018-09-06)
Merve Aksoz, Esra Albayrak, Galip Servet Aslan, Raife Dilek Turan, Lamia Yazgi Alyazici, Pınar Siyah, Emre Can Tuysuz, Serli Canikyan, Dogacan Yucel, Neslihan Meric, Zafer Gulbas, Fikrettin Sahin, Fatih Kocabas
ABSTRACT

c-Myc plays a major role in the maintenance of glycolytic metabolism and hematopoietic stem cell (HSC) quiescence. Targeting modulators of HSC quiescence and metabolism could lead to HSC cell cycle entry with concomitant expansion. Here we show that c-Myc inhibitor 10074-G5 treatment leads to 2-fold increase in murine LSKCD34low HSC compartment post 7 days. In addition, c-Myc inhibition increases CD34+ and CD133+ human HSC number. c-Myc inhibition leads to downregulation of glycolytic and cyclindependent kinase inhibitor (CDKI) gene expression ex vivo and in vivo. In addition, c-Myc inhibition upregulates major HDR modulator Rad51 expression in hematopoietic cells. Besides, c-Myc inhibition does not alter proliferation kinetics of endothelial cells, fibroblasts or adipose-derived mesenchymal stem cells, however, it limits bone marrow derived mesenchymal stem cell proliferation. We further demonstrate that a cocktail of c-Myc inhibitor 10074-G5 along with tauroursodeoxycholic acid (TUDCA) and i-NOS inhibitor L-NIL provides a robust HSC maintenance and expansion ex vivo as evident by induction of all stem cell antigens analyzed. Intriguingly, the cocktail of c-Myc inhibitor 10074-G5, TUDCA and L-NIL improves HDR related gene expression. These findings provide tools to improve ex vivo HSC maintenance and expansion, autologous HSC transplantation and gene editing through modulation of HSC glycolytic and HDR pathways.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Fetal Bovine Serum, USA origin, suitable for cell culture
Sigma-Aldrich
α-Tocopherol, ≥95.5%
Sigma-Aldrich
bisBenzimide H 33342 trihydrochloride, for fluorescence, ≥97.0% (HPLC)
Sigma-Aldrich
10074-G5, ≥98% (HPLC)

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