Name: Onametostat (JNJ-64619178)
Brand: Selleck Chemicals
SKU: S8624
Rating: 5 (6 reviews)

Onametostat (JNJ-64619178) is a PRMT5 inhibitor with high selectivity and potency (subnanomolar range, PRMT5-MEP-50 IC50=0.14 nM) under different in vitro and cellular conditions, paired with favorable pharmacokinetics and safety properties.

Onametostat (JNJ-64619178) Chemical Structure

CAS: 2086772-26-9

Selleck's Onametostat (JNJ-64619178) has been cited by 6 publications

Purity & Quality Control

Batch: Purity: 99.95%

99.95

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Signaling Pathway

Histone Methyltransferase Signaling Pathway

Choose Selective Histone Methyltransferase Inhibitors

Cell Data

Cell Lines	Assay Type	Incubation Time	Activity Description	PMID
Sf9	Function assay		Inhibition of full-length human N-terminal FLAG-tagged PRMT5/full length N-terminal His6-tagged MEP50 (unknown origin) expressed in baculovirus infected Sf9 insect cells assessed as reduction of S-adenosyl-L-homocysteine formation using human recombinant , IC50=0.00013μM	30956011
Sf9	Function assay	120 mins	Inhibition of full-length human N-terminal FLAG-tagged PRMT5 expressed in Sf9 insect cells using histone H2A as peptide after 120 mins in presence of SAM by high throughput mass spectrometer assay, IC50=0.00014μM	30366617
A549	Function assay	48 hrs	Inhibition of PRMT5 in human A549 cells assessed as reduction in sDMA production after 48 hrs by Hoechst Stain/HCS CellMask Deep Red Stain based immunohistochemistry method, IC50=0.00025μM	30956011
HEK293	Function assay	60 mins	Inhibition of human N-terminal FLAG-tagged PRMT5 (2 to end) expressed in HEK293 cells using biotinylated H2A as substrate measured after 60 mins in presence of SAM by high throughput mass spectrometer assay, IC50=0.0063μM	29870258
Click to View More Cell Line Experimental Data

Biological Activity

Description

Onametostat (JNJ-64619178) is a PRMT5 inhibitor with high selectivity and potency (subnanomolar range, PRMT5-MEP-50 IC50=0.14 nM) under different in vitro and cellular conditions, paired with favorable pharmacokinetics and safety properties.

Targets

PRMT5 ^[1]

0.14 nM

In vitro
In vitro	JNJ-64619178 binds into the SAM binding pocket and reaches the substrate binding pocket to inhibit PRMT5/MEP50 function in a time-dependent manner. Broad cell line panel profiling of JNJ-64619178 reveals a wide range of sensitivity, which is indicative of a genomic dependency instead of a general cytotoxic on-target consequence of PRMT5 inhibition^[1].

In Vivo
In vivo	JNJ-64619178, dosed orally (10 mg/kg, every day), shows selective and efficient blockage of the methylation of SMD1/3 proteins, which are crucial components of the spliceosome and substrates of PRMT5/MEP50. JNJ-64619178 also demonstrates tumor regression in a biomarker-driven human small cell lung cancer xenograft model (NCI-H1048) and prolongs tumor growth inhibition after dosing cessation. In rodent and nonrodent toxicology studies, a tolerated dose of JNJ-64619178 has been identified, with the observed toxicity consistent with on-target activity. In summary, JNJ-64619178 has a favorable preclinical package that supports clinical testing in patients diagnosed with lung cancer and hematologic malignancies1^[1].
Animal Research	Animal Models	C57BL/6 mice
	Dosages	10 mg/kg
	Administration	p.o.

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
Clinical Trial Information (data from https://clinicaltrials.gov, updated on 2024-01-11)
NCT03573310	Active not recruiting	Neoplasms\|Solid Tumor Adult\|Non-Hodgkin Lymphoma\|Myelodysplastic Syndromes	Janssen Research & Development LLC	July 13 2018	Phase 1

References

Chemical Information & Solubility

Molecular Weight	483.36	Formula	C₂₂H₂₃BrN₆O₂
CAS No.	2086772-26-9	SDF	Download Onametostat (JNJ-64619178) SDF
Smiles	C1C(C(C(C1N2C=CC3=C(N=CN=C32)N)O)O)CCC4=CC5=NC(=C(C=C5C=C4)Br)N
Storage (From the date of receipt)	3 years-20°Cpowder	Storage of Stock Solutions Aliquot the stock solutions to avoid repeated freeze-thaw cycles	1 year-80°Cin solvent
Storage (From the date of receipt)	3 years-20°Cpowder		1 month-20°Cin solvent

In vitro
Batch:

DMSO : 97 mg/mL ( (200.67 mM)； Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molecular Weight Calculator

In vivo
Batch:

Add solvents to the product individually and in order.

In vivo Formulation Calculator

Preparing Stock Solutions

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In vivo Formulation Calculator (Clear solution)

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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.

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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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