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Cat. No. M2055
Niclosamide Structure


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Free Sample (0.5-1 mg)  USD 0 In stock
500mg USD 60 In stock
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Quality Control
Biological Activity

Niclosamide (trade name Niclocide) is a teniacide in the anthelmintic family. Niclosamide inhibits the transcription of STAT3 target genes and induces cell growth inhibition, apoptosis and cell cycle arrest of cancer cells with constitutively active STAT3. It does not decrease the level or activity of the related STAT1, STAT5, JAK or Src kinases. Niclosamide also reversibly inhibits mTORC1 signaling and stimulates autophagy in vitro. Niclosamide inhibits the transcription and DNA binding of NF-κB. It blocks tumor necrosis factor-induced IκBα phosphorylation, translocation of p65, and expression of NF-κB– regulated genes in AML cells. Niclosamide inhibits the proliferation and colony formation of Du145 prostate cancer cells, which have constitutively active STAT3, with IC50 values of 0.7 and 0.1 μM, respectively.

Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)
Species Mouse Rat Rabbit Guinea pig Hamster Dog
Weight (kg) 0.02 0.15 1.8 0.4 0.08 10
Body Surface Area (m2) 0.007 0.025 0.15 0.05 0.02 0.5
Km factor 3 6 12 8 5 20
Animal A (mg/kg) = Animal B (mg/kg) multiplied by  Animal B Km
Animal A Km

For example, to modify the dose of resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for resveratrol of 11.2 mg/kg.

Chemical Information
Molecular Weight 327.12
Formula C13H8Cl2N2O4
CAS Number 50-65-7
Purity >99%
Solubility Ethanol
Storage at -20°C

Antineoplastic mechanisms of niclosamide in acute myelogenous leukemia stem cells: inactivation of the NF-kappaB pathway and generation of reactive oxygen species.
Jin Y, et al. Cancer Res. 2010 Mar 15;70(6):2516-27. PMID: 20215516.

Screen for chemical modulators of autophagy reveals novel therapeutic inhibitors of mTORC1 signaling.
Balgi AD, et al. PLoS One. 2009 Sep 22;4(9):e7124. PMID: 19771169.

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Keywords: Niclosamide, Niclocide supplier, STAT, inhibitors

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