Novel Culture Medium using a Small-molecule Agonist of Thrombopoetin Receptor
Poster Mar 20, 2015
Hondo M1; Nishino T2; Inamura M1
Hematopoietic stem cells (HSCs), defined by their capacity to self-renew and differentiate into all blood cell lineages, can be applied for transplantation therapy. Since a large number of HSCs are required for clinical use, improvement of techniques for expansion of HSCs ex vivo is a critical issue. Several cytokines have been used for this purpose. Thrombopoietin (TPO) is an essential cytokine that regulates megakaryocyte production and HSC proliferation via activating signaling through its receptor c- MPL. We have developed a small-molecule agonist (NR-101) of c-MPL and report that human HSCs are expanded efficiently ex vivo with NR-101. Using a new small-molecule agonist NR- 102 which is related to NR-101, we produced a novel culture medium, ReproHSCTM. The cost for culture of human HSC can be reduced by using this small-molecule.
Here we demonstrated that ReproHSCTM efficiently expands human CD34+CD38- primitive hematopoietic cells in culture and thereby enhances repopulating capacity of HSCs in NOD/SCID mice. Human blood cord CD34+ cells were cultured with ReproHSCTM supplemented with only Stem Cell Factor (SCF) for 7 days. The total cell number was increased about 40-fold during culture. CD34+ cells and CD34+CD38- cells were expanded 12- fold and 8.5-fold, respectively. We then transplanted expanded cells with ReproHSCTM supplemented with SCF and flt3 ligand for 14 days into NOD/SCID mice and analyzed the SCID-repopulating CD45+ cells with flow cytometry. The expanded cells established engraftment better than the fresh CD34+ cells did. These results indicate that ReproHSCTM is a novel medium suitable for the expansion of HSCs ex vivo.
Quantitative Live-Cell Analysis Using Automated Long-Term ImagingPoster
Here we describe a continuous live-cell assay for determining cell proliferation profiles using the BioSpa Automated Live Cell Imaging System, consisting of BioSpa 8 and Cytation 5.READ MORE
Bioluminescent Kinase Profiling Systems For Characterizing Small Molecule Kinase InhibitorsPoster
In order to profile compounds against a broad panel of kinases, in-house profiling requires rigorous kinase assay development.READ MORE
Characterizing GPCR Activation Using Automated Live Cell ImagingPoster
Here we describe a live cell imaging based approach to detect GPCR activation using the Lionheart™ FX Automated Live Cell Imager and Gen5™ Microplate Reader and Imager Software.READ MORE
Comments | 0 ADD COMMENT
9th International conference on Tissue Engineering and Regenerative Medicine
Nov 09 - Nov 10, 2018
International Conference & Exhibition on Tissue Engineering and Biobanking
Apr 23 - Apr 24, 2018