Name: Niraparib (MK-4827)
Brand: Selleck Chemicals
SKU: S2741
Rating: 5 (109 reviews)

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Quality Control

Batch: Purity: 99.99%

99.99

Related Targets	HDAC ATM/ATR DNA-PK WRN DNA/RNA Synthesis Topoisomerase PPAR Sirtuin Casein Kinase eIF
Other PARP Inhibitors	XAV-939 AZD5305 (Saruparib) Veliparib (ABT-888) PJ34 HCl AG-14361 Iniparib (BSI-201) G007-LK Pamiparib UPF 1069 A-966492

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description	PMID
HeLa cells	Function assay			Inhibition of PARP in hydrogen peroxide-induced human HeLa cells assessed as inhibition DNA-damage-induced PARylation, EC50=0.004 μM	19873981
A549 cells	Cytotoxicity assay		5-7 days	Cytotoxicity against human A549 cells transfected with BRCA2 shRNA assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50=0.011 μM	25761096
MDA-MB-436 cells	Proliferation assay		6 days	Antiproliferative activity against human MDA-MB-436 cells expressing BRCA1 5396 + 1G>A mutant after 6 days by cell titer-blue assay, CC50=18 nM	19873981
SUM1315MO2 cells	Cytotoxicity assay		12 days	Cytotoxicity against human SUM1315MO2 cells carrying BRCA1 mutant assessed as inhibition of cell proliferation after 12 days by CellTiter-Blue assay, CC50=0.02 μM	25761096
DoTc2-4510 cells	Cytotoxicity assay		5-7 days	Cytotoxicity against human DoTc2-4510 cells carrying BRCA2 mutant assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50=0.023 μM	25761096
SUM149PT cells	Cytotoxicity assay		5-7 days	Cytotoxicity against human SUM149PT cells carrying BRCA1 mutant assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50=0.024 μM	25761096
UWB1.289 cells	Cytotoxicity assay		5-7 days	Cytotoxicity against human UWB1.289 cells carrying BRCA1 mutant assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50=0.056 μM	25761096
Capan1 cells	Cytotoxicity assay			Cytotoxicity against BRCA2-deficient human Capan1 cells, CC50=0.09 μM	25761096
Jurkat cells	Function assay			Inhibition of PARP1 in human Jurkat cells assessed as reduction of cell viability after 96 hrs by MTS assay in presence of 100 uM of temozolomide, EC50=0.2 μM	23850199
BT20 cells	Cytotoxicity assay		5-7 days	Cytotoxicity against human BT20 cells assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50=2.2 μM	25761096
Antiproliferative assay	HeLa		7 days	Antiproliferative activity against BRCA1 deficient human HeLa cells after 7 days by cell titer-blue assay, CC50 = 0.033 μM.	19873981
Function assay	HeLa			Inhibition of PARP in hydrogen peroxide-induced human HeLa cells assessed as inhibition DNA-damage-induced PARylation, EC90 = 0.045 μM.	19873981
Antiproliferative assay	Capan1		13 days	Antiproliferative activity against human Capan1 cells expressing BRCA2 6174delT mutation and loss of wild-type allele after 13 days by cell titer-blue assay, CC50 = 0.09 μM.	19873981
Antiproliferative assay	HeLa		7 days	Antiproliferative activity against human HeLa cells expressing wild type BRCA1 after 7 days by cell titer-blue assay, CC50 = 0.86 μM.	19873981
Function assay	Jurkat		96 hrs	Inhibition of PARP1 in human Jurkat cells assessed as reduction of cell viability after 96 hrs by MTS assay, EC50 = 31 μM.	23850199
Function assay	CAPAN-1			Inhibition of PARP in BRCA2-deficient human CAPAN-1 cells assessed as inhibition of hydrogen peroxide-induced PARylation by cell-based assay, IC50 = 0.0035 μM.	25761096
Function assay	HeLa			Inhibition of PARP in human HeLa cells assessed as inhibition of hydrogen peroxide-induced PARylation by cell-based assay, EC50 = 0.004 μM.	25761096
Function assay	A2780			Inhibition of PARP in human A2780 cells assessed as inhibition of hydrogen peroxide-induced PARylation by cell-based assay, IC50 = 0.004 μM.	25761096
Cytotoxicity assay	MDA-MB-436			Cytotoxicity against human MDA-MB-436 cells carrying BRCA1 mutant assessed as inhibition of cell proliferation, CC50 = 0.018 μM.	25761096
Cytotoxicity assay	HeLa		5 to 7 days	Cytotoxicity against human HeLa cells transfected with BRCA1 shRNA assessed as reduction of cell viability after 5 to 7 days by CellTiter-Blue assay, CC50 = 0.034 μM.	25761096
Function assay	HeLa			Inhibition of PARP in human HeLa cells assessed as inhibition of hydrogen peroxide-induced PARylation by cell-based assay, IC90 = 0.046 μM.	25761096
Function assay	CAPAN-1			Inhibition of PARP in BRCA2-deficient human CAPAN-1 cells assessed as inhibition of hydrogen peroxide-induced PARylation by cell-based assay, IC90 = 0.05 μM.	25761096
Function assay	A2780			Inhibition of PARP in human A2780 cells assessed as inhibition of hydrogen peroxide-induced PARylation by cell-based assay, IC90 = 0.052 μM.	25761096
Cytotoxicity assay	HeLa		5 to 7 days	Cytotoxicity against wild type human HeLa cells assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50 = 0.852 μM.	25761096
Cytotoxicity assay	UWB1.289		5 to 7 days	Cytotoxicity against human UWB1.289 cells expressing BRCA1 assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50 = 0.975 μM.	25761096
Cytotoxicity assay	A549		5 to 7 days	Cytotoxicity against wild type human A549 cells assessed as inhibition of cell proliferation after 5 to 7 days by CellTiter-Blue assay, CC50 = 1.76 μM.	25761096
Cytotoxicity assay	Capan1			Cytotoxicity against BRCA2-deficient human Capan1 cells, EC50 = 0.65 μM.	26652717
Antitumor assay	MDA-MB-436	50 mg/kg	33 days	Antitumor activity against human MDA-MB-436 cells expressing BRCA1 5396 + 1G>A mutant xenografted in CD1 mouse assessed as tumor regression at 50 mg/kg, po bid for 33 days	19873981
Antitumor assay	MDA-MB-436	100 mg/kg	33 days	Antitumor activity against human MDA-MB-436 cells expressing BRCA1 5396 + 1G>A mutant xenografted in CD1 mouse assessed as tumor regression at 100 mg/kg, po qd for 33 days	19873981
Antitumor assay	MDA-MB-436	80 mg/kg	1 to 2 weeks	Antitumor activity against human MDA-MB-436 cells harboring BRCA1 mutant xenografted in immunocompromised mouse assessed as tumor growth inhibition at 80 mg/kg, po qd for 1 to 2 weeks	25761096
Antitumor assay	MDA-MB-436	80 mg/kg	4 weeks	Antitumor activity against human MDA-MB-436 cells harboring BRCA1 mutant xenografted in immunocompromised mouse assessed as complete and sustained tumor regression at 80 mg/kg, po qd for 4 weeks	25761096
Antitumor assay	MDA-MB-436	50 mg/kg		Antitumor activity against human MDA-MB-436 cells harboring BRCA1 mutant xenografted in immunocompromised mouse assessed as tumor growth inhibition at 50 mg/kg, po administered daily	25761096
Antitumor assay	MDA-MB-436	80 mg/kg	3 weeks	Antitumor activity against human MDA-MB-436 cells harboring BRCA1 mutant xenografted in immunocompromised mouse assessed as tumor shrinkage at 80 mg/kg, po qd for 3 weeks	25761096
qHTS assay	TC32			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for TC32 cells	29435139
qHTS assay	A673			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells	29435139
qHTS assay	NB1643			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB1643 cells	29435139
qHTS assay	A673			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for A673 cells)	29435139
qHTS assay	BT-37			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for BT-37 cells	29435139
qHTS assay	SK-N-MC			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells	29435139
qHTS assay	NB-EBc1			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB-EBc1 cells	29435139
qHTS assay	LAN-5			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells	29435139
qHTS assay	SK-N-MC			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for SK-N-MC cells	29435139
qHTS assay	TC32			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for TC32 cells	29435139
Click to View More Cell Line Experimental Data

Chemical Information, Storage & Stability

Molecular Weight	320.39	Formula	C₁₉H₂₀N₄O	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	1038915-60-4	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent

Solubility

In vitro
Batch:

DMSO : 64 mg/mL (199.75 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 64 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
=	×	×

Dilution Calculator Molecular Weight Calculator

In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	2.500mg/ml (7.80mM)	Taking the 1 mL working solution as an example, add 50 μL of 50 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to make it clear; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	2.500mg/ml (7.80mM)	Taking the 1 mL working solution as an example, add 50 μL of 50 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to make it clear; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

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Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid 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 master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
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Mechanism of Action

Targets/IC₅₀/Ki	PARP2 (Cell-free assay) 2.1 nM PARP1 (Cell-free assay) 3.8 nM
In vitro	In a whole cell assay, Niraparib (MK-4827) inhibited PARP activity with EC50 = 4 nM and inhibited proliferation of cancer cells with mutant BRCA-1 and BRCA-2 with CC50 in the 10-100 nM range. It was demonstrated to be a potent and selective PARP-1 and PARP-2 inhibitor with IC50=3.8 and 2.1 nM, respectively. Furthermore, this compound displayed at least a 100-fold selectivity over PARP-3, V-PARP, and tankyrase-1, with IC50 = 1300, 330, and 570 nM, respectively. As well as inhibiting the growth of HeLa cell lacking BRCA-1 because of silencing by RNA interference, it is able to inhibit the proliferation of cancer cell lines carrying natural BRCA-1 or BRCA-2 mutations. In MDA-MB-436 human mammary gland adenocarcinoma cells carrying BRCA-1 mutations, it displayed CC50 = 18 nM, while in CAPAN-1 human pancreatic adenocarcinoma cells, which are BRCA-2 mutant, it displayed CC50 = 90 nM. In contrast, normal human prostate and mammary epithelial cells are resistant to MK-4827, displaying antiproliferative effects in the micromolar range, thereby demonstrating the very high selective cytotoxicity from these PARP inhibitors in BRCA-1 and -2 mutant cancer cells compared to surrounding tissue.
In vivo	Niraparib (MK-4827), a novel, orally bioavailable, PARP-1 and PARP-2 inhibitor, strongly enhanced the effect of radiation on a variety of human tumour xenografts, both p53 wild type and p53 mutant. It was well tolerated in vivo and demonstrated efficacy as a single agent in a xenograft model of BRCA-1 deficient cancer.
References	[1] https://pubmed.ncbi.nlm.nih.gov/22127459/ [2] https://pubmed.ncbi.nlm.nih.gov/19873981/

Applications

Methods	Biomarkers	Images	PMID
Western blot	c-PARP /c-caspase 3 / γ-H2AX		29158830
Immunofluorescence	Rad51 / Geminin		27614696

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT05289648	Not yet recruiting	Endometrial Cancer\|Serous Adenocarcinoma\|Uterine Neoplasm	Sir Mortimer B. Davis - Jewish General Hospital	May 1 2024	Early Phase 1
NCT06077877	Recruiting	Neoplasms	GlaxoSmithKline	October 24 2023	Phase 1\|Phase 2
NCT05666349	Withdrawn	Recurrent Glioblastoma	University College London\|GlaxoSmithKline	October 13 2023	Phase 1

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Handling Instructions

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Frequently Asked Questions

Question 1:
How to reconstitute it for in vivo studies?

Answer:
It can be orally administered using the formulation 1% CMC-Na (suspension).

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Niraparib (MK-4827) PARP inhibitor

Chemical Structure

Molecular Weight: 320.39