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Methoxsalen P450 (e.g. CYP17) inhibitor

Name: Methoxsalen
Brand: Selleck Chemicals
SKU: S1952
Availability: InStock
Rating: 5 (8 reviews)

Cat.No.S1952

Methoxsalen (Xanthotoxin, NCI-C55903) is a naturally occurring photoactive substance found in the seeds of the Ammi majus (Umbelliferae) plant, used in the diagnosis and treatment of psoriasis; this compound is a CYP2A5/6 inhibitor.

Chemical Structure

Molecular Weight: 216.19

Jump to Mechanism of Action Solubility Chemical Information, Storage & Stability Specificity

Quality Control

Batch: Purity: 99.99%

99.99

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Chemical Information, Storage & Stability

Molecular Weight	216.19	Formula	C₁₂H₈O₄	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	298-81-7	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	Xanthotoxin, NCI-C55903			Smiles	COC1=C2C(=CC3=C1OC=C3)C=CC(=O)O2

Solubility

In vitro
Batch:

DMSO : 43 mg/mL ( (198.89 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Ethanol : 5 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.

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.

Mechanism of Action

Targets/IC₅₀/Ki	CYP2A5 ^[6] CYP2A6 ^[6]
In vitro	Methoxsalen inhibits CYP2A6 (Ki = 0.8 μM) with about 3.5- 94-fold greater potency than other P450s, except for CYP1A2 (Ki = 0.2 μM). This compound shows noncompetitive inhibition of nicotine metabolism, with an apparent Ki value of 0.1 μM in cDNA-expressing microsomes. ^[1] It is metabolized in human liver microsomes at the rate of 50-100 pmol/mg protein/min (approx. 30% of the activity in mouse liver microsomes). This chemical is a very potent inhibitor of human cytochrome P450 2A6 (CYP2A6) and mouse Cyp2a-5-mediated coumarin 7-hydroxylation in vitro. ^[2]
In vivo	Methoxsalen results in a significant decrease in the following factors: number and diameter of corpus lutei, Graafian follicles, diameter of granulosa cell layer and oocytes, number of primordial and primary and growing follicles, while the number of atretic follicle is increased. This compound also significantly reduces circulating estrogen levels in blood serum of oogenesis Balb/C mice. ^[3] It dose-dependently stimulates a sustained increase in short-circuit current in the mouse jejunum. The chemical increases the open probability of the basolateral IK(Ca) channel of isolated crypts in the mouse jejunum. ^[4] It effectively reverses trimethyltin (TMT)-induced memory impairment on both Y-maze and passive avoidance tests in mice. This agent inhibits brain AchE activity. It significantly ameliorates the level of oxidative stress. ^[5]
References	https://pubmed.ncbi.nlm.nih.gov/11353760/ https://pubmed.ncbi.nlm.nih.gov/7945434/ https://pubmed.ncbi.nlm.nih.gov/24381860/ https://pubmed.ncbi.nlm.nih.gov/12392107/ https://pubmed.ncbi.nlm.nih.gov/21979070/ https://pubmed.ncbi.nlm.nih.gov/24859605/

Clinical Trial Information

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

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT04389281	Recruiting	Advanced Solid Tumor Cancer	Immunolight LLC	December 8 2021	Phase 1

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