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Catalog No.: 52024
Cas No.: 1009820-21-6
Purity : 98% 

1. Silmitasertib (CX-4945) is a potent and selective orally bioavailable small molecule inhibitor of Casein kinase II (CK2). The antiproliferative activity of CX-4945 against cancer cells correlated with expression levels of the CK2α catalytic subunit. CX-4945 caused cell-cycle arrest and selectively induced apoptosis in cancer cells relative to normal cells. When administered orally in murine xenograft models, CX-4945 was well tolerated and demonstrated robust antitumor activity. Senhwa Biosciences is developing silmitasertib for the treatment of cholangiocarcinoma, other solid tumours, Castleman's disease (giant lymph node hyperplasia) and multiple myeloma. The compound was originally developed by Cylene Pharmaceuticals. Phase Ib/II development is underway in the US and South Korea for the treatment of cholangiocarcinoma, and development in the remaining indications is at the phase I stage. As at July 2016, no recent reports of development had been identified for phase-I development in Giant-lymph-node-hyperplasia in USA (PO, Capsule), phase-I development in Multiple-myeloma in USA (PO, Capsule), phase-I development in Solid-tumours (Late-stage disease) in USA (PO, Capsule).

2. Application 

In Vivo Use Guide 

Interim results of a phase I trial showed that silmitasertib was well-tolerated in patients with solid tumours. Thirteen such patients (3-4 patients per cohort, from four separate dose cohorts) received oral, twice-daily doses of silmitasertib for 21 consecutive days of a 4-week cycle. The trial design provided for administration of silmitasertib in successive dose cohorts at 90mg, 160mg, 300mg, 460mg, 700mg and 1000mg per dose. No adverse events of grade ≥3 were reported. No dose-limiting toxicities had been observed and the maximum tolerated dose was yet to be defined.

Route of Administration: Oral

In Vitro Use Guide 

Silmitasertib (CX-4945) exerts antiproliferative activity of in a panel of breast cancer cell lines with EC50 1.71-20.01 uM

For research use only. We do not sell to patients.

Chemical Information

Iupac Chemical Name5-(3-chlorophenylamino)benzo[c][2,6]naphthyridine-8-carboxylic acid 
SynonymsCX-4945;Silmitasertib;CX4945;CX 4945 
Molecular FormulaC19H12ClN3O2 
Molecular Weight349.77 
CAS Number1009820-21-6
Related CAS

Ordering Information

PackagingPriceAvailabilityPurityShipping Time
Request Bulk Quote Download MSDS Tel : +86-27-65522453   Email : sales@sun-shinechem.com
Formulationyellow solid 
Storage3 years -20ºCpowder 6 months-80ºCin solvent 
Solubility5mg/ml in DMSO 
Shipping ConditionShipped under ambient temperature 
HS Code
Coming soon.
Cell study
Animal study
Clinical study
Not available

Chemical Structure

52024 - CX-4945(Silmitasertib) | CAS 1009820-21-6

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