Name: PKR-IN-C16
Brand: Selleck Chemicals
SKU: S9668
Rating: 5 (4 reviews)

PKR-IN-C16 (imoxin, C16, Imidazolo-oxindole PKR inhibitor C16) is a specific inhibitor of RNA-dependent protein kinase (PKR, Protein Kinase R, EIF2AK2). PKR-IN-C16 prevents apoptosis and IL-1β production in an acute excitotoxic rat model with a neuroinflammatory component.

PKR-IN-C16 Chemical Structure

CAS: 608512-97-6

Selleck's PKR-IN-C16 has been cited by 4 publications

Purity & Quality Control

Batch: Purity: 99.9%

99.9

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Biological Activity

Description

PKR-IN-C16 (imoxin, C16, Imidazolo-oxindole PKR inhibitor C16) is a specific inhibitor of RNA-dependent protein kinase (PKR, Protein Kinase R, EIF2AK2). PKR-IN-C16 prevents apoptosis and IL-1β production in an acute excitotoxic rat model with a neuroinflammatory component.

Targets

PKR ^[1]

IL-1β ^[1]

In vitro
In vitro	PKR-IN-C16 suppresses proliferation of HCC cells in a dose-dependent manner in vitro. Transcript levels of vascular endothelial growth factor-A and factor-B, platelet-derived growth factor-A and factor-B, fibroblast growth factor-2, epidermal growth factor, and hepatocyte growth factor, which are angiogenesis-related growth factors, are significantly decreased by PKR-IN-C16 in vitro. PKR-IN-C16 blockes tumor cell growth and angiogenesis via a decrease in mRNA levels of several growth factors.^[2]
Cell Research	Cell lines	Huh7 cells
	Concentrations	500–3000 nM
	Incubation Time	120 min
	Method	In vitro cell viability is quantified with the MTS assay. Huh7 cells treated with several concentrations (500–3000 nM) of the PKR inhibitor are seeded in 96-well plates at 2 × 10³ cells per well. At each time point, cells are treated with MTS reagent and incubated for 120 min. Absorbance at 450 nm is recorded. Cells treated with DMSO are used as controls. The wells are photographed under the microscope.

In Vivo
In vivo	Inflammation is induced by unilateral striatal injection of quinolinic acid (QA) in 10-week-old normotensive rats. The highest dose of C16 (600 μg/kg; C16-2) in QA rats reduces expression of the active catalytic domain of the PKR vs. that in vehicle-injected QA rats. A robust increase of IL-1b levels on the contralateral side of QA rats is prevented by C16-2 (97% inhibition). Macroscopic and microscopic observation of cerebral tissue revealed that tissue integrity is more preserved with C16-2 treatment than its vehicle in QA rats. Furthermore, C16-2 treatment decreases by 47% the neuronal loss and by 37% the number of positive cleaved caspase-3 neurons induced by QA injection. In conclusion, C16 prevents not only the PKR-induced neuronal loss but also the inflammatory response in this acute excitotoxic in vivo model, highlighting its promising neuroprotective properties to rescue acute brain lesions.^[1]
Animal Research	Animal Models	10-week-old male normotensive male Wistar rats
	Dosages	60 μg/kg, 600 μg/kg
	Administration	IP

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
Clinical Trial Information (data from https://clinicaltrials.gov, updated on 2024-01-11)
NCT04716452	Not yet recruiting	Acute Myeloid Leukemia in Relapse\|Acute Myeloid Leukemia Refractory	Keystone Nano Inc\|University of Virginia\|Milton S. Hershey Medical Center	June 1 2024	Phase 1
NCT06180837	Not yet recruiting	Lifestyle Factors\|Overweight and Obesity\|Insulin Sensitivity\|Eating Habit\|Sleep Hygiene\|Type 2 Diabetes\|Sleep\|Sleep Deprivation\|Insufficient Sleep Syndrome	University of Utah	December 2023	Not Applicable
NCT05554627	Withdrawn	Depressive Disorder Major	VA Office of Research and Development	October 27 2023	Phase 4
NCT05280015	Recruiting	Depression\|Depressive Disorder\|Depressive Disorder Major	Centre Hospitalier Universitaire de Besancon\|Fondation FondaMental\|GYNOV	June 8 2022	Phase 2
NCT05791370	Completed	Diet\|Healthy	Malaysia Palm Oil Board\|Universiti Putra Malaysia	January 1 2019	Not Applicable

References

Chemical Information & Solubility

Molecular Weight	268.29	Formula	C₁₃H₈N₄OS
CAS No.	608512-97-6	SDF	--
Smiles	C1=CC2=C(C3=C1NC(=O)C3=CC4=CN=CN4)SC=N2
Storage (From the date of receipt)	3 years -20°C powder	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°C powder		1 month-20°Cin solvent

In vitro
Batch:

DMSO : 13 mg/mL ( (48.45 mM)； Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble

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In vivo
Batch:

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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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