Date published: 2025-11-22

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Smad3 Inhibitor, SIS3 (CAS 1009104-85-1)

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Alternate Names:
6,7-Dimethoxy-2-((2E)-3-(1-methyl-2-phenyl-1H-pyrrolo[2,3-b]pyridin-3-yl-prop-2-enoyl))-1,2,3,4-tetrahydroisoquinoline
Application:
Smad3 Inhibitor, SIS3 is a cell permeable pyrrolopyridine and selective inhibitor of TGF-β1-dependent Smad3 phosphorylation
CAS Number:
1009104-85-1
Purity:
≥90%
Molecular Weight:
453.53
Molecular Formula:
C28H27N3O3
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.
* Refer to Certificate of Analysis for lot specific data.

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SMAD3, an intracellular protein regulated by receptors, plays a vital role in transmitting signals from TGF-β and activin receptors. It contributes to various cellular processes such as cell proliferation, differentiation, apoptosis, and the formation of the extracellular matrix. The effectiveness of Smad3 Inhibitor, SIS3, lies in its selective inhibition of TGF-β and activin signaling by suppressing the phosphorylation of Smad3 (IC50 = 3 µM). Notably, it does not impact the MAPK/p38, ERK, or PI3-kinase signaling pathways. Studies have demonstrated that Smad3 Inhibitor, SIS3 effectively reduces the expression of type 1 procollagen induced by TGF-β1 and inhibits myofibroblast differentiation in both normal dermal fibroblasts and scleroderma fibroblasts.


Smad3 Inhibitor, SIS3 (CAS 1009104-85-1) References

  1. SMAD3 is essential for transforming growth factor-β1-induced urokinase type plasminogen activator expression and migration in transformed keratinocytes.  |  Kocic, J., et al. 2012. Eur J Cancer. 48: 1550-7. PMID: 21798735
  2. Transforming growth factor-β stimulates β amyloid uptake by microglia through Smad3-dependent mechanisms.  |  Tichauer, JE. and von Bernhardi, R. 2012. J Neurosci Res. 90: 1970-80. PMID: 22715062
  3. Transforming growth factor-β1 mediates psoriasis-like lesions via a Smad3-dependent mechanism in mice.  |  Zhang, Y., et al. 2014. Clin Exp Pharmacol Physiol. 41: 921-32. PMID: 25132073
  4. Inhibition of development of laser-induced choroidal neovascularization with suppression of infiltration of macrophages in Smad3-null mice.  |  Iwanishi, H., et al. 2016. Lab Invest. 96: 641-51. PMID: 26950486
  5. Smad3 promotes cancer progression by inhibiting E4BP4-mediated NK cell development.  |  Tang, PM., et al. 2017. Nat Commun. 8: 14677. PMID: 28262747
  6. The preventive and therapeutic implication for renal fibrosis by targetting TGF-β/Smad3 signaling.  |  Zhang, Y., et al. 2018. Clin Sci (Lond). 132: 1403-1415. PMID: 29875262
  7. Combined Blockade of Smad3 and JNK Pathways Ameliorates Progressive Fibrosis in Folic Acid Nephropathy.  |  Jiang, M., et al. 2019. Front Pharmacol. 10: 880. PMID: 31447676
  8. Smad3 signalling affects high glucose-induced podocyte injury via regulation of the cytoskeletal protein transgelin.  |  Jiang, L., et al. 2020. Nephrology (Carlton). 25: 659-666. PMID: 32034833
  9. Puromycin aminonucleoside-induced podocyte injury is ameliorated by the Smad3 inhibitor SIS3.  |  Jiang, L., et al. 2020. FEBS Open Bio. 10: 1601-1611. PMID: 32583562
  10. Treatment of Hypertensive Heart Disease by Targeting Smad3 Signaling in Mice.  |  Meng, J., et al. 2020. Mol Ther Methods Clin Dev. 18: 791-802. PMID: 32953930
  11. Mitomycin C induces pulmonary vascular endothelial-to-mesenchymal transition and pulmonary veno-occlusive disease via Smad3-dependent pathway in rats.  |  Zhang, C., et al. 2021. Br J Pharmacol. 178: 217-235. PMID: 33140842
  12. A potential requirement for Smad3 phosphorylation in Notch-mediated EMT in colon cancer.  |  Clark, AG., et al. 2023. Adv Biol Regul. 88: 100957. PMID: 36739740
  13. SARS-CoV-2 N protein induces acute kidney injury in diabetic mice via the Smad3-Ripk3/MLKL necroptosis pathway.  |  Liang, L., et al. 2023. Signal Transduct Target Ther. 8: 147. PMID: 37029116

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Smad3 Inhibitor, SIS3, 1 mg

sc-222318
1 mg
$252.00

Why this inhibitor has no effect on Smad2? What is the detail mechism?

Asked by: jackoo1
Thank you for your question. Please consult the primary literature for more detailed information about the mechanism for this chemical, Smad3 Inhibitor, SIS3. As a reference, please refer to the following publication which may be useful. Jinnin, M., et al. 2006. Mol. Pharmacol. 69, 597.
Answered by: Technical Support
Date published: 2017-11-17

What is the solubility of this product in DMSO?

Asked by: hawkeye11
Thank you for your question. This product is soluble in DMSO up to 30 mg/ml. Please contact Technical Service if you have further questions concerning this product.
Answered by: Tech Service 9
Date published: 2018-07-14
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Rated 5 out of 5 by from WangWang, Z. et al. (PMC 4440186) used SIS3 (Smad3 Inhibitor) to demonstrate that neovibsanin B induced stimulation of ECM proteins via Smad3. -SCBT Publication Review
Date published: 2015-05-24
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Smad3 Inhibitor, SIS3 is rated 5.0 out of 5 by 1.
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