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MK-4827PARP-1/-2 inhibitor,potent and selective


Catalog No. A3617
Size Price Stock Qty
5mg $137.00 Ship Within 10-14 Days
10mg $231.00 Please Inquire
50mg $778.00 Please Inquire
100mg $1,367.00 Please Inquire

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Sample solution is provided at 25 µL, 10mM.

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Chemical structure


Biological Activity

MK-4827 is a potent, selective inhibitor of PARP 1 and PARP 2 with IC50 of 3.8 and 2.1 nM, respectively.
Targets PARP1 PARP2        
IC50 3.8 nM 2.1 nM        

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Chemical Properties

Cas No. 1038915-60-4 SDF Download SDF
Synonyms Niraparib; MK 4827; MK4827
Chemical Name 2-[4-[(3S)-piperidin-3-yl]phenyl]indazole-7-carboxamide
Canonical SMILES C1CC(CNC1)C2=CC=C(C=C2)N3C=C4C=CC=C(C4=N3)C(=O)N
Formula C19H20N4O M.Wt 320.39
Solubility DMSO Storage Store at -20°C
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
Shipping Condition Evaluation sample solution : ship with blue ice
All other available size: ship with RT , or blue ice upon request


MK-4827 is a novel, selective and orally bioavailable PARP1/PARP2 inhibitor with IC50 of 3.8 nM and 2.1 nM, respevctively.MK-4827 has shown great activity against cancer cells with mutant BRCA-1 and BRCA-2; >330-fold selective against PARP3, V-PARP and Tank1 [1].

Poly(ADP-ribose) polymerase-1 (PARP-1) and PARP-2 belong to a family of enzymes (PARP) that, using β-NAD+as a substrate, catalyze poly(ADP-ribosyl)ation of proteins, synthesize and transfer ADP-ribose polymers onto glutamate, aspartate or lysine residues of acceptor proteins, modifying their functional properties. PARP inhibitors compete with NAD+ at the highly conserved enzyme active site, making them new potential therapeutic strategies as chemo- and radio-potentiation and for the treatment of cancers with specific DNA repair defects as single-agent therapies [2].

In vitro: MK-4827displayed excellent PARP 1 and 2 inhibition with IC50 of 3.8 and 2.1 nM, respectively. In a whole cell assay, MK-4827 inhibited PARP activity with EC50 of 4 nM. MK-4827 also inhibited proliferation of cancer cells with mutant BRCA-1 and BRCA-2 with CC50 in the 10-100 nM range[1].

In vivo: In a variety of human tumor xenografts of differing p53 status,MK-4827 showed high potential to improve the efficacy of radiotherapy,such as Calu-6 (p53 null), A549 (p53 wild-type [wt]) and H-460 (p53 wt) lung cancers and triple negative MDA-MB-231 human breast carcinoma [3].

[1] Jones P1,Altamura S,Boueres J,Ferrigno F, et al.  Discovery of 2-{4-[(3S)-piperidin-3-yl]phenyl}-2H-indazole-7-carboxamide (MK-4827): a novel oral poly(ADP-ribose)polymerase (PARP) inhibitor efficacious in BRCA-1 and -2 mutant tumors. J Med Chem.2009 Nov 26;52(22):7170-85.
[2] Yelamos J, Farres J, Llacuna L, et al.  PARP-1 and PARP-2: New players in tumourdevelopment[J]. Am J Cancer Res, 2011, 1(3): 328-346.
[3] Wang L1,Mason KA,Ang KK,Buchholz T,Valdecanas D,Mathur A,Buser-Doepner C,Toniatti C,Milas L.  MK-4827, a PARP-1/-2 inhibitor, strongly enhances response of human lung and breast cancer xenografts to radiation. Invest New Drugs.2012 Dec;30(6):2113-20.