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ARQ 531

Cat. No. M9958
ARQ 531 Structure


Size Price Availability Quantity
10mg USD 279  USD310 In stock
25mg USD 603  USD670 In stock
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Quality Control
  • Current batch:
  • Purity >99%
  • COA
  • MSDS
Biological Activity

ARQ 531 is a potent reversible inhibitor of BTK (IC50 = 0.85 nM), exhibits potent antitumor activity in ibrutinib-resistant diffuse large B-cell lymphoma. ARQ 531 targets multiple oncogenic signaling pathways in both ABC- and GCB-DLBCL cell lines. Unlike ibrutinib, ARQ 531 suppressed both the upstream activating signals (via inhibition of a select member of Src kinase family) and the downstream signaling pathways (via pAKT and pERK kinases). In GCB-DLBCL cell lines (SUDHL-4 and DOHH-2), ARQ 531 potently suppressed expression of anti-apoptotic c-Myc and BCL6 oncoproteins in a dose dependent fashion, and concomitantly induced apoptotic cleavage of PARP protein. 

In the ibrutinib-resistant SUDHL-4 mouse xenograft model, ARQ 531 potently suppressed tumor growth (>80% inhibition) compared to the control group when dosed orally at 75 mg/kg. Additionally, preliminary data suggest that ARQ 531 crosses the blood, brain-barrier.

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.

Chemical Information
Molecular Weight 478.93
Formula C25H23ClN4O4
CAS Number 2095393-15-8
Purity >99%
Solubility DMSO ≥ 80 mg/mL
Storage at -20°C

ARQ 531, a potent reversible BTK inhibitor, exhibits potent antitumor activity in ibrutinib-resistant diffuse large B-cell lymphoma
Sudharshan Eathiraj, et al. AACR. 2018 Jul;Volume 78, Issue 13, pp. 1963.

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Abmole Inhibitor Catalog 2017

Keywords: ARQ 531, ARQ-531 supplier, BTK, inhibitors

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