RO9021

Alias: RO9021; RO 9021; RO-9021
Cat No.:V2673 Purity: ≥98%
RO9021 (RO-9021) is a potent, orally bioavailavle, ATP-competative and selective inhibitor of spleen tyrosine kinase (SYK) with usefulness in autoimmune disease therapy, such as arthritis.
RO9021 Chemical Structure CAS No.: 1446790-62-0
Product category: Syk
This product is for research use only, not for human use. We do not sell to patients.
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description

RO9021 (RO-9021) is a potent, orally bioavailavle, ATP-competative and selective inhibitor of spleen tyrosine kinase (SYK) with usefulness in autoimmune disease therapy, such as arthritis. It suppresses B-cell receptor signaling and inhibits SYK kinase activity with an average IC50 of 5.6 nM. An earlier investigation discovered that RO9021 could inhibit mouse bone marrow macrophage in vitro osteoclastogenesis in addition to suppressing Bcell receptor signaling in human peripheral blood mononuclear cells and whole blood, FcγR signaling in human monocytes, and Fc R signaling in human mast cells. Furthermore, it has been observed that RO9021 may inhibit the Toll-like Receptor 9 signaling in human B cells. This could result in a reduction of plasmablasts, immunoglobulin (Ig) G, and IgM levels following B-cell differentiation.

Biological Activity I Assay Protocols (From Reference)
Targets
SYK (IC50 = 5.6 nM)
ln Vitro

RO9021 inhibits FcγR signaling in human monocytes, FcεR signaling in human mast cells, and BCR signaling in human peripheral blood mononuclear cells (PBMC) and whole blood. It also prevents mouse bone marrow macrophages from promoting osteoclastogenesis in vitro. Following B-cell differentiation, RO9021 inhibited Toll-like Receptor (TLR) 9 signaling in human B cells, which led to decreased levels of plasmablasts, immunoglobulin (Ig)M, and IgG. Moreover, when TLR9 was activated, RO9021 significantly reduced the production of type I interferon by human plasmacytoid dendritic cells (pDC). Since RO9021 did not impede JAK-STAT or TLR4-mediated signaling, this effect is unique to TLR9. RO9021 doesn't significantly block the JAK-STAT pathway [1].

ln Vivo
In the mCIA model, oral RO9021 administration slows the progression of arthritis[1].
Enzyme Assay
Among the 392 kinases that have been tested, SYK is the only kinase that exhibits 99% competition with RO9021. RO9021 is a highly selective SYK inhibitor, with low S-scores of 0.003 for S(99) and 0.015 for S(90). As a result of blocking SYK kinase activity, RO9021 attenuates the downstream signaling cascade of the BCR. This is demonstrated by the fact that RO9021 inhibits the phosphorylation of BTK, PLCγ2, AKT, and ERK induced by antibodies.
Cell Assay
The human B-cell line Ramos was pretreated with 1 μM RO9021 before the BCR was cross-linked by an anti-IgM antibody. Using phosphospecific antibodies, a western blot was used to evaluate the activation of different BCR signaling components.
Animal Protocol
C57BL/6 and DBA/1J adult mice
5 and 45 mg/kg daily
oral administration
References

[1]. Arthritis Res Ther . 2013 Oct 4;15(5):R146.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C18H25N7O
Molecular Weight
355.44
Exact Mass
355.21
Elemental Analysis
C, 60.82; H, 7.09; N, 27.58; O, 4.50
CAS #
1446790-62-0
Related CAS #
1446790-62-0
Appearance
Solid powder
SMILES
CC1=C(N=C(C=C1)NC2=CC(=NN=C2C(=O)N)N[C@@H]3CCCC[C@@H]3N)C
InChi Key
XJZVCDVZCRLIKN-QWHCGFSZSA-N
InChi Code
InChI=1S/C18H25N7O/c1-10-7-8-15(21-11(10)2)23-14-9-16(24-25-17(14)18(20)26)22-13-6-4-3-5-12(13)19/h7-9,12-13H,3-6,19H2,1-2H3,(H2,20,26)(H2,21,22,23,24)/t12-,13+/m0/s1
Chemical Name
6-[[(1R,2S)-2-aminocyclohexyl]amino]-4-[(5,6-dimethylpyridin-2-yl)amino]pyridazine-3-carboxamide
Synonyms
RO9021; RO 9021; RO-9021
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: ~71 mg/mL (~199.8 mM)
Water: <1 mg/mL
Ethanol: ~10 mg/mL (~28.1 mM)
Solubility (In Vivo)
O=C(C1=NN=C(N[C@H]2[C@@H](N)CCCC2)C=C1NC3=NC(C)=C(C)C=C3)N
 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.8134 mL 14.0671 mL 28.1341 mL
5 mM 0.5627 mL 2.8134 mL 5.6268 mL
10 mM 0.2813 mL 1.4067 mL 2.8134 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.

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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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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.
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Biological Data
  • Structure, potency and selectivity of a novel spleen tyrosine kinase inhibitor, RO9021. Arthritis Res Ther . 2013 Oct 4;15(5):R146.
  • Inhibition of B-cell receptor and Fc Receptor pathways by RO9021. Arthritis Res Ther . 2013 Oct 4;15(5):R146.
  • Marginal effect of RO9021 in the JAK–STAT pathway. Arthritis Res Ther . 2013 Oct 4;15(5):R146.
  • Dose-dependent inhibitory effects of RO9021 on osteoclastogenesis. Arthritis Res Ther . 2013 Oct 4;15(5):R146.
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