For all experiments, lineage
−, Sca-1
+, c-kit
+ (LSK) and LSK, CD150
+, CD48
− cells were isolated as previously described [9 (
link)]. Sorted LSK cells were cultured in serum-free
StemSpan media (Stem Cell Technologies, Vancouver, BC, Canada,
http://www.stemcell.com) supplemented with 25 ng/mL stem cell factor (SCF) and fms-like tyrosine kinase-3 ligand (Flt3L). Sorted and LSK, CD150
+, CD48
− cells were cultured in serumfree
StemSpan media (supplemented with 25 ng/mL SCF and thrombopoietin (TPO). All cytokines were obtained from Peprotech (Rocky Hill, NJ,
http://www.peprotech.com). Sorted cells were incubated overnight before reseeding at 5 × 10
4 cells (LSK) or 1.5 × 10
4 cells (LSK, CD150
+, CD48
−) per milliliter in fresh media.
Recombinant Wnt5a (R&D Systems, Minneapolis, MN,
http://www.abgent.com) and anti-Ryk antibody (clone RB1491, Abgent, San Diego, CA) were added at 250 ng/mL and 1
μg/mL, respectively. Media were changed at 48 hours. For specific experiments, cells were treated with 0.1 mM
buthionine sulfoximine (BSO) (Sigma Aldrich).
Povinelli B.J, & Nemeth M.J. (2014). Wnt5a Regulates Hematopoietic Stem Cell Proliferation and Repopulation Through the Ryk Receptor. Stem cells (Dayton, Ohio), 32(1), 105-115.