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Suramin hexasodium salt

Catalog No.
P2 purinergic antagonist
Grouped product items
SizePriceStock Qty
10mM (in 1mL H2O)
In stock
In stock

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Suramin hexasodium salt, as a polysulfonated naphthylurea, is a potent competitive inhibitor of DNA topoisomerase II, with an IC50 of 5 μM.

DNA topoisomerase II cuts both strands of the DNA helix simultaneously to manage DNA tangles and supercoils. Once cut, the ends of the DNA are separated and another DNA duplex passed through the break. then the cut DNA is religated.

Suramin can inhibit cell proliferation and DNA synthesis in HeLa cells culture. It abolishes the replication of SV40 DNA completely with 40 μM concentration. DNA polymerase α is more sensitive to concentrations of suramin than DNA polymerase δ with the IC50 of 8 µM and 36 µM respectively. Suramin is a potent inhibitor of DNA strand exchange and ATPase activities of bacterial RecA proteins and RecA-catalysed proteolytic cleavage of the LexA repressor. The inhibition mechanism of suramin involves its ability to disassemble RecA–single-stranded DNA filaments.

In the animal assay, compared to control rats, treatment with suramin shows lower values for pulmonary artery pressure, right ventricular hypertrophy, and distal vessel muscularization on day 21. Suramin treatment suppresses PA-SMC proliferation and attenuates both the inflammatory response and the deposition of collagen. 


[1].Jindal HK, et al. Suramin affects DNA synthesis in HeLa cells by inhibition of DNA polymerases. Cancer Res. 1990 Dec 15;50(24):7754-7.

[2].Nautiyal A, et al. Suramin is a potent and selective inhibitor of Mycobacterium tuberculosis RecA protein and the SOS response: RecA as a potential target for antibacterial drug discovery. J Antimicrob Chemother. 2014 Jul;69(7):1834-43.

[3].Bojanowski K, et al. Suramin is an inhibitor of DNA topoisomerase II in vitro and in Chinese hamster fibrosarcomacells. Proc Natl Acad Sci U S A. 1992 Apr 1;89(7):3025-9.

[4].Izikki M, et al. The beneficial effect of suramin on monocrotaline-induced pulmonary hypertension in rats. PLoS One. 2013 Oct 15;8(10):e77073.

Chemical Properties

Physical AppearanceA solid
StorageStore at RT
Cas No.129-46-4
Solubility≥71.45mg/mL in H2O
Chemical Namesodium 8,8'-((3,3'-((3,3'-(carbonylbis(azanediyl))bis(benzoyl))bis(azanediyl))bis(4-methylbenzoyl))bis(azanediyl))bis(naphthalene-1,3,5-trisulfonate)
SDFDownload SDF
Canonical SMILES[O-]S(=O)(C1=C(C(NC(C2=CC=C(C)C(NC(C3=CC=CC(NC(NC4=CC(C(NC5=CC(C(NC(C(C6=CC(S([O-])(=O)=O)=C7)=C7S([O-])(=O)=O)=CC=C6S([O-])(=O)=O)=O)=CC=C5C)=O)=CC=C4)=O)=C3)=O)=C2)=O)=CC=C8S([O-])(=O)=O)C8=CC(S([O-])(=O)=O)=C1)=O.[Na+].[Na+].[Na+].[Na+].[Na+].[Na+]
Shipping ConditionEvaluation sample solution: ship with blue ice. All other available sizes: ship with RT, or blue ice upon request.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. Stock solution can be stored below -20°C for several months.

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