Home Transmembrane Transporters CRM1 inhibitor Leptomycin B (LMB)

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Leptomycin B (LMB) CRM1 inhibitor

Cat.No.S7580

Leptomycin B (LMB, CI 940, Elactocin, Mantuamycin, NSC 364372) is a potent antifungal antibiotic isolated from Streptomyces and acts as a specific inhibitor of the nuclear export factor CRM1. Leptomycin B rapidly induces cytotoxic effects in cancer cell lines via covalent inhibition of CRM1 with IC50 values of 0.1 nM–10 nM.
Leptomycin B (LMB) CRM1 inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 540.73

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Quality Control

Chemical Information, Storage & Stability

Molecular Weight 540.73 Formula

C33H48O6

 Storage (From the date of receipt) 3 years -20°C powder
CAS No. 87081-35-4 -- Storage of Stock Solutions

Solubility

In vitro
Batch:

DMSO : 100 mg/mL (184.93 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 100 mg/mL

Water : Insoluble

Molarity Calculator

Mass Concentration Volume Molecular Weight

In vivo
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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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Mechanism of Action

Targets/IC50/Ki
CRM1 [1]
In vitro

Leptomycin B (LMB) is a potent anti-fungal antibiotic from Streptomyces sp., also can inhibit the expression of COX-2 mRNA and protein induced by serum withdrawal in MDA-MB-231 cells.[1][2]
In vivo

Leptomycin B (LMB) Reduces Matrix Metalloproteinase-9 Expression and Suppresses Cutaneous Inflammation
References

Clinical Trial Information

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

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT03027388 Completed
Astrocytoma Grades II III and IV|Glioblastoma Multiforme|Giant Cell Glioblastoma|Glioma|Oligodendrogliomas
National Cancer Institute (NCI)|National Institutes of Health Clinical Center (CC)
 January 9 2019 Phase 2
NCT03804879 Completed
Diabetic Nephropathy
Novartis Pharmaceuticals|Novartis
 December 17 2018 Phase 2

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