StemRegenin1 (SR1) is a selective, cell-permeable antagonist of aryl hydrocarbon receptor. It can promote robust expansion and self-renewal of human CD34+ peripheral blood and cord blood hematopoietic stem cells (HSCs, EC50 ~120 nM). SR1 expanded CD34+ cells from bone marrow of humans, monkeys and dogs, but not mice. Culture of HSCs with 1 µM SR1 for 21 days led to a 50-fold increase in cells expressing CD34 and a 17-fold increase in cells that retain the ability to engraft immunodeficient mice. Currently Novartis is conducting clinical trials, “LFU835-expanded Umbilical Cord Blood Hematopoietic Stem Cells in Patients With Hematological Malignancies”, related to this research.
CAS Number: 1227633-49-9
Molecular Weight: 429.54
Chemical Name: 4-(2-((2-(benzo[b]thiophen-3-yl)-9-isopropyl-9H-purin-6-yl)amino)ethyl)phenol
Appearance: Solid Power.
Purity: ≥98% (or refer to the Certificate of Analysis)
Solubility: DMSO up to 100 mM
Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis
Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.
Shelf Life: ≥12 months if stored properly.
Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.
Drug Formulation: To be determined.
HS Tariff Code: 382200
How to use
SR1 was used at 1 µM final concentration (DMSO 0.01%) in the ex vivo cell culture for 7-21 days. SR1 may be refreshed every 2-3 days during the culture.
- Anthony E. Boitano et al. Aryl Hydrocarbon Receptor Antagonists Promote the Expansion of Human Hematopoietic Stem Cells. (2010) Science 329(5997):1345-8
- Csaszar E, et al. Rapid expansion of human hematopoietic stem cells by automated control of inhibitory feedback signaling.(2012) Cell Stem Cell.10(2):218-29.
Products are for research use only. Not for human use.
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