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Purity: ≥98%
StemRegenin 1(abbreviated as SR1; SR-1), a purine derivative, is a potent antagonist of the aryl hydrocarbon receptor (AhR) with important biological activity. It inhibits AhR with IC50 of 127 nM in CD34+ cells. SR1 has been found to promote the ex vivo expansion of CD34+ cells. SR1 has also been found to induce the ex vivo differentiation of pDCs, BDCA1+ and BDCA3+ mDCs as well as the generation of high numbers of all these DC subsets.
| ln Vitro |
The aryl hydrocarbon receptor is antagonistically acted upon by stem regenin 1 (SR1). (AhR). With an EC50 of less than 120 nM, stemregenin 1 boosts the number of CD34+ cells after 5 to 7 days. Based on these findings, it can be concluded that StemRegenin 1-induced CD34+ cell growth is mediated by direct binding and AhR inhibition (IC50=40 nM). StemRegenin 1 also reduces photoaffinity ligand (PAL) binding. StemRegenin 1 (SR1), an antagonist of the aryl hydrocarbon receptor, strongly encourages the ex vivo growth of human CD34+ cells. Treatment with stemgenin 1 reduces VentX expression levels and speeds up CD34+ cell proliferation[2].
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| ln Vivo |
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| References |
[1]. Boitano AE, et al. Aryl Hydrocarbon Receptor Antagonists Promote the Expansion of Human Hematopoietic Stem Cells. Science. 2010 Sep 10;329(5997):1345-8.
[2]. Gao H, et al. Suppression of homeobox transcription factor VentX promotes expansion of human hematopoietic stem/multipotent progenitor cells. J Biol Chem. 2012 Aug 24;287(35):29979-87 |
| Molecular Formula |
C24H23N5OS
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| Molecular Weight |
429.54
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| CAS # |
1227633-49-9
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| Related CAS # |
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| SMILES |
OC1=CC=C(CCNC2=C3N=CN(C(C)C)C3=NC(C4=CSC5=CC=CC=C54)=N2)C=C1
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| Synonyms |
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
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| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
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| Solubility (In Vivo) |
Solubility in Formulation 1: ≥ 2.5 mg/mL (5.82 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL. Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution. Solubility in Formulation 2: 2.5 mg/mL (5.82 mM) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), suspension solution; with ultrasonication. For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly. Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. View More
Solubility in Formulation 3: ≥ 2.5 mg/mL (5.82 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution. |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.3281 mL | 11.6404 mL | 23.2807 mL | |
| 5 mM | 0.4656 mL | 2.3281 mL | 4.6561 mL | |
| 10 mM | 0.2328 mL | 1.1640 mL | 2.3281 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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