1. Stem Cell/Wnt
  2. Wnt
  3. Pyrvinium pamoate

Pyrvinium pamoate  (Synonyms: Pyrvinium embonate)

Cat. No.: HY-A0293 Purity: 98.64%
COA Handling Instructions

Pyrvinium pamoate is an FDA-approved antihelmintic agent that inhibits WNT pathway signaling.

For research use only. We do not sell to patients.

Pyrvinium pamoate Chemical Structure

Pyrvinium pamoate Chemical Structure

CAS No. : 3546-41-6

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Customer Review

Based on 9 publication(s) in Google Scholar

Top Publications Citing Use of Products

    Pyrvinium pamoate purchased from MedChemExpress. Usage Cited in: Am J Cancer Res. 2022 Nov 15;12(11):5226-5240.  [Abstract]

    Pyrvinium pamoate, a specific inhibitor of the Wnt pathway, is used to treat KIF3A knockdown cells. Pyrvinium pamoate blocks Wnt pathway can reverse the effects induced by KIF3A siRNA in HONE1 and SUNE1 cells.
    • Biological Activity

    • Protocol

    • Purity & Documentation

    • References

    • Customer Review


    Pyrvinium pamoate is an FDA-approved antihelmintic agent that inhibits WNT pathway signaling.

    In Vitro

    Pyrvinium pamoate (0-500 nM) inhibits proliferation of MCF-7 (luminal), MDA-MB-231 (claudin-low), MDA-MB-468 (basal-like) and SkBr3 (HER2-OE) cells in a dose-dependent manner, with IC50 value of 1170±105.0 nM against MDA-MB-231 cell line. Pyrvinium pamoate significantly inhibits self-renewal and proliferation of BCSCs, and suppresses BCSC population with a distinct phenotype. Pyrvinium pamoate significantly decreases average expression levels of FZD1, FZD10, WNT1, WNT7B, CTNNB1, MYC, and LRP5 at transcriptional level. Moreover, Pyrvinium pamoate also efficiently down-regulates the expression of other stemness genes including ALDH1, CD44 and ABCG2[1]. Pyrvinium pamoate blocks colon cancer cell growth in vitro in a dose-dependent manner with great differences in the inhibitory concentration (IC50), ranging from 0.6 to 65 μM for colon cancer cells with mutations in WNT signaling. Pyrvinium pamoate decreases messenger RNA (mRNA) and protein levels of known WNT target genes as c-MYC and thereby led to the induction of p21[2]. Pyrvinium pamoate ultimately inhibits Wnt signalling despite its lack of efficacy on CK1[3]. Pyrvinium pamoate imposes specific toxicity on cardiac fibroblasts in ischemia (IC50=9.5 nM). The cytotoxic effect of Pyrvinium pamoate on cardiac fibroblasts specifically under glucose- and glutamine-deficient condition[4].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    In Vivo

    In the xenograft model, Pyrvinium pamoate (500 nM)-pretreatment strongly delays tumor size and tumor weight, and the tumor volume is markedly decreased[1].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Clinical Trial
    Molecular Weight



    C26H28N3.1/2 C23H14O6

    CAS No.



    Red to reddish brown




    Room temperature in continental US; may vary elsewhere.


    4°C, sealed storage, away from moisture and light

    *The compound is unstable in solutions, freshly prepared is recommended.

    Solvent & Solubility
    In Vitro: 

    DMSO : 16.67 mg/mL (28.96 mM; Need ultrasonic)

    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 1.7370 mL 8.6851 mL 17.3702 mL
    5 mM 0.3474 mL 1.7370 mL 3.4740 mL
    10 mM 0.1737 mL 0.8685 mL 1.7370 mL
    *Please refer to the solubility information to select the appropriate solvent.
    In Vivo:
    • 1.

      Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% Saline

      Solubility: ≥ 1.67 mg/mL (2.90 mM); Clear solution

    • 2.

      Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

      Solubility: 1.67 mg/mL (2.90 mM); Suspended solution; Need ultrasonic

    *All of the co-solvents are available by MedChemExpress (MCE).
    Purity & Documentation

    Purity: 98.72%

    Cell Assay

    Pyrvinium pamoate is dissolved in DMSO at a concentration of 1 μM and is stocked in aliquots at -20°C. Cells (1×104) are suspended in 200 μL culture medium and then seeded into 96-well plates in quintuplicate overnight. Cells are treated with indicated concentrations of Pyrvinium pamoate (0-8,000 μM). After incubating for 3 days, CCK8 (10 μL) is added into each well and incubated at 37°C for 1 h. The absorbance is measured using a microplate reader at 450 nm[1].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    Animal Administration

    Mice: NOD/SCID mice are housed under aseptic conditions in individually ventilated cages. For xenografting, 5×106 Pyrvinium pamoate-pretreated or untreated breast cancer cells (MDA-MB-231) are resuspended in a 1:1 mixture of culture medium and Matrigel and then transplanted into the fourth pair of mammary fat pads of mice (4-6-week-old). After injection, tumor size is measured by calipers each day and tumor growth is plotted. Upon reaching the endpoint, mice are sacrificed and tumors are harvested. All the tumors are formalin-fixed, and paraffin-embedded for hematoxylin and eosin and immunohistochemical staining[1].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

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    Help & FAQs
    • Do most proteins show cross-species activity?

      Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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