Name: G1T38
Brand: Selleck Chemicals
SKU: S8568
Availability: InStock
Rating: 5 (2 reviews)

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Quality Control

Batch: Purity: 99.52%

99.52

Related Targets	HSP PD-1/PD-L1 ROCK Wee1 DNA/RNA Synthesis Microtubule Associated Ras KRas Aurora Kinase Casein Kinase
Other CDK Inhibitors	AS2863619 Ro-3306 SEL120 (SEL120-34A) hydrochloride INX-315 Tagtociclib (PF-07104091) PF-07220060 (CDK4/6-IN-6) AZD4573 ON123300 Enitociclib (BAY 1251152) Samuraciclib (ICEC0942) hydrochloride

Solubility

In vitro
Batch:

DMSO : 1 mg/mL (2.1 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection 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.
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.	0.05mg/ml (0.11mM)	Taking the 1 mL working solution as an example, add 50 μL of 1 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 clarify; 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.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.05mg/ml (0.11mM)	Taking the 1 mL working solution as an example, add 50 μL of 1 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. 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)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

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.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	474.60	Formula	C₂₆H₃₄N₈O	Storage (From the date of receipt)	3 years -20°C powder
CAS No.	1628256-23-4	--		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	Lerociclib			Smiles	CC(C)N1CCN(CC1)C2=CN=C(C=C2)NC3=NC=C4C=C5C(=O)NCC6(N5C4=N3)CCCCC6

Mechanism of Action

Targets/IC₅₀/Ki	CDK4 (Cell-free assay) 1 nM CDK6 (Cell-free assay) 2 nM CDK9 (Cell-free assay) 28 nM
In vitro	G1T38 is highly potent and selective for CDK4/cyclin D1 and CDK6/cyclin D3 over CDK1, CDK2, CDK5 and CDK7 and their respective binding partners. In vitro, this compound decreases RB1 phosphorylation, causes a precise G1 arrest, and inhibits cell proliferation in a variety of CDK4/6-dependent tumorigenic cell lines including breast, melanoma, leukemia, and lymphoma cells with EC50 concentrations as low as 23 nM.
In vivo	In vivo, G1T38 treatment leads to equivalent or improved tumor efficacy compared to the first-in-class CDK4/6 inhibitor, palbociclib, in an ER+ breast cancer xenograft model. Furthermore, this compound accumulates in mouse xenograft tumors but not plasma, resulting in less inhibition of mouse myeloid progenitors than after palbociclib treatment. In larger mammals, this difference in pharmacokinetics allows for 28 day continuous dosing of this chemical in beagle dogs without producing severe neutropenia.
References	[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5522071/

Applications

Methods	Biomarkers	Images	PMID
Western blot	pRB(Ser807/811) / RB		28418845

Clinical Trial Information

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

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT03455829	Completed	Carcinoma Non-Small-Cell Lung\|Lung Cancer\|Non-small Cell Lung Cancer	G1 Therapeutics Inc.	March 29 2018	Phase 1\|Phase 2
NCT02983071	Active not recruiting	Carcinoma Ductal Breast\|Breast Cancer\|Breast Neoplasm	G1 Therapeutics Inc.	January 2017	Phase 1\|Phase 2
NCT02821624	Completed	Healthy Volunteers	G1 Therapeutics Inc.	May 2016	Phase 1

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Handling Instructions

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G1T38 CDK inhibitor

Chemical Structure

Molecular Weight: 474.60