A 83-01

Catalog # Availability Size / Price Qty
A 83-01 | CAS No. 909910-43-6 | TGF-beta Receptor Inhibitors
1 Image
Description: Selective inhibitor of TGF-βRI, ALK4 and ALK7

Chemical Name: 3-(6-Methyl-2-pyridinyl)-N-phenyl-4-(4-quinolinyl)-1H-pyrazole-1-carbothioamide

Purity: ≥98%

Product Details
Citations (77)
Supplemental Products
Reviews (10)

Biological Activity

A 83-01 is a potent inhibitor of TGF-β type I receptor ALK5 kinase, type I activin/nodal receptor ALK4 and type I nodal receptor ALK7 (IC50 values are 12, 45 and 7.5 nM respectively). Blocks phosphorylation of Smad2 and inhibits TGF-β-induced epithelial-to-mesenchymal transition. Only weakly inhibits ALK-1, -2, -3, -6 and MAPK activity. More potent than SB 431542 (Cat.No. 1614). Inhibits differentiation of rat induced pluripotent stem cells (riPSCs) and increases clonal expansion efficiency. Helps maintain homogeneity and long-term in vitro self-renewal of human iPSCs. Also promotes neural differentiation of hPSCs as part of a chemical cocktail.

Technical Data

Soluble to 50 mM in DMSO
Store at -20°C

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.
Tocris products are intended for laboratory research use only, unless stated otherwise.

Background References

  1. Organoid Models of Human and Mouse Ductal Pancreatic Cancer.
    Boj SF, Hwang C, Baker LA et al.
  2. 3D mouse embryonic stem cell culture for generating inner ear organoids.
    Koehler KR, Hashino E.
    Nat Protoc
  3. The ALK5 inhibitor A-83-01 inhibits smad signaling and epithelial-to-mesenchymal transition by transforming growth factor-β.
    Tojo et al.
    Cancer.Sci., 2005;96:791
  4. Generation of rat and human induced pluripotent stem cells by combining genetic reprogramming and chemical inhibitors.
    Li et al.
    Cell Stem Cell, 2009;4:16
  5. Attachment to laminin-111 facilitates transforming growth factor β-induced expression of matrix metalloproteinase-2 in synovial fibroblasts.
    Hoberg et al.
    Ann.Rheum.Dis., 2008;66:446
  6. In vitro expansion of human gastric epithelial stem cells and their responses to bacterial infection.
    Bartfeld et al.
    Gastroenterology, 2015;148:126
  7. Generation of Cerebral Organoids from Human Pluripotent Stem Cells
    Lancaster et al.
    Nat.Protoc., 2015;9:2329
  8. Isolation and in vitro expansion of human colonic stem cells.
    Jung et al.
    Nat.Med., 2011;17:1225
  9. Identification of multipotent luminal progenitor cells in human prostate organoid cultures.
    Karthaus et al.
    Cell, 2014;159:163
  10. SnapShot: Growing Organoids from Stem Cells.
    Sato et al.
    Cell, 2015;161:1700
  11. Establishment of gastrointestinal epithelial organoids
    Mahe et al.
    Curr.Protoc. Mouse Biol., 2014;3:217
  12. Chemically defined neural conversion of human pluripotent stem cells.
    Chen et al.
    Methods Mol.Biol., 2019;1919:59

Product Datasheets

Or select another batch:
Reconstitution Calculator
Molarity Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Molarity Calculator


*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Citations for A 83-01

The citations listed below are publications that use Tocris products. Selected citations for A 83-01 include:

77 Citations: Showing 1 - 10

  1. A versatile polypharmacology platform promotes cytoprotection and viability of human pluripotent and differentiated cells.
    Authors: Chen Et al.
    Nat.Methods  2021;18:528
  2. Critical Role of Type III Interferon in Controlling SARS-CoV-2 Infection in Human Intestinal Epithelial Cells
    Authors: Stanifer Et al.
    Cell Rep  2020;32
  3. Snake venom gland organoids.
    Authors: Post Et al.
    Cell  2020;180:233
  4. Immunoevolution of mouse pancreatic organoid isografts from preinvasive to metastatic disease.
    Authors: Filippini Et al.
    Sci Rep  2019;9:12286
  5. Evaluating Shigella flexneri Pathogenesis in the Human Enteroid Model.
    Authors: Ranganathan Et al.
    Infect Immun  2019;87
  6. Sera Antibody Repertoire Analyses Reveal Mechanisms of Broad and Pandemic Strain Neutralizing Responses after Human Norovirus Vaccination.
    Authors: Lindesmith Et al.
    Immunity  2019;50:1530
  7. Expansion of Luminal Progenitor Cells in the Aging Mouse and Human Prostate.
    Authors: Crowell Et al.
    Cell Rep  2019;28:1499
  8. Establishment of Patient-Derived Organoids and Drug Screening for Biliary Tract Carcinoma.
    Authors: Saito Et al.
    Cell Rep  2019;27:1265
  9. Rectal Organoids Enable Personalized Treatment of Cystic Fibrosis.
    Authors: Berkers Et al.
    Cell Rep  2019;26:1701
  10. Establishment and Morphological Characterization of Patient-Derived Organoids from Breast Cancer.
    Authors: Mazzucchelli Et al.
    Biol Proced Online  2019;21:12
  11. Conserved regulation of RNA processing in somatic cell reprogramming.
    Authors: Kanitz Et al.
    BMC Genomics  2019;20:100
  12. Development of Collagen-Based 3D Matrix for Gastrointestinal Tract-Derived Organoid Culture.
    Authors: Jee Et al.
    Stem Cells Int  2019;2019:8472712
  13. Folding-function relationship of the most common cystic fibrosis-causing CFTR conductance mutants.
    Authors: Willigen Et al.
    Life Sci Alliance  2019;2
  14. Chemically Defined Neural Conversion of Human Pluripotent Stem Cells
    Authors: Chen Et al.
    Methods Mol.Biol.  2019;1919:59
  15. Capacitation of human na�ve pluripotent stem cells for multi-lineage differentiation.
    Authors: Rostovskaya Et al.
    Development  2019;146
  16. Activin Is Superior to BMP7 for Efficient Maintenance of Human iPSC-Derived Nephron Progenitors.
    Authors: Tanigawa Et al.
    Stem Cell Reports  2019;13:322
  17. Activating a Reserve Neural Stem Cell Population In Vitro Enables Engraftment and Multipotency after Transplantation.
    Authors: Peterson Et al.
    Stem Cell Reports  2019;12:680
  18. Role of cyclooxygenase-2-mediated prostaglandin E2-prostaglandin E receptor 4 signaling in cardiac reprogramming.
    Authors: Muraoka Et al.
    Nat Commun  2019;10:674
  19. Human Intestinal Enteroids Model MHC-II in the Gut Epithelium.
    Authors: Wosen Et al.
    Front Immunol  2019;10:1970
  20. LRH-1 mitigates intestinal inflammatory disease by maintaining epithelial homeostasis and cell survival.
    Authors: Bayrer Et al.
    Nat Commun  2018;9:4055
  21. A stably self-renewing adult blood-derived induced neural stem cell exhibiting patternability and epigenetic rejuvenation.
    Authors: Sheng Et al.
    Nat Commun  2018;9:4047
  22. Morphological alterations of cultured human colorectal matched tumour and healthy organoids.
    Authors: Kashfi Et al.
    Oncotarget  2018;9:10572
  23. Expansion of Airway Basal Cells and Generation of Polarized Epithelium.
    Authors: Levardon Et al.
    Bio Protoc  2018;8
  24. COX-2-PGE2 Signaling Impairs Intestinal Epithelial Regeneration and Associates with TNF Inhibitor Responsiveness in Ulcerative Colitis.
    Authors: Li Et al.
    EBioMedicine  2018;36:497
  25. Development and Characterization of Human Cerebral Organoids: An Optimized Protocol.
    Authors: Yakoub and Sadek
    Cell Transplant  2018;27:393
  26. Single-Cell Analysis Identifies LY6D as a Marker Linking Castration-Resistant Prostate Luminal Cells to Prostate Progenitors and Cancer.
    Authors: Barros-Silva Et al.
    Cell Rep  2018;25:3504
  27. Super-Obese Patient-Derived iPSC Hypothalamic Neurons Exhibit Obesogenic Signatures and Hormone Responses.
    Authors: Rajamani Et al.
    Cell Stem Cell  2018;22:698
  28. Myoepithelial Cells of Submucosal Glands Can Function as Reserve Stem Cells to Regenerate Airways after Injury.
    Authors: Tata Et al.
    Cell Stem Cell  2018;22:668
  29. Submucosal Gland Myoepithelial Cells Are Reserve Stem Cells That Can Regenerate Mouse Tracheal Epithelium.
    Authors: Lynch Et al.
    Cell Stem Cell  2018;22:653
  30. CRISPR-based chromatin remodeling of the endogenous Oct4 or Sox2 locus enables reprogramming to pluripotency.
    Authors: Liu Et al.
    Cell Stem Cell.  2018;22:252
  31. Inflammatory Cytokine TNFα Promotes the Long-Term Expansion of Primary Hepatocytes in 3D Culture.
    Authors: Peng Et al.
    Cell  2018;175:1607
  32. Colon organoid formation and cryptogenesis are stimulated by growth factors secreted from myofibroblasts.
    Authors: Yip Et al.
    PLoS One  2018;13:e0199412
  33. Colonoscopy-based colorectal cancer modeling in mice with CRISPR-Cas9 genome editing and organoid transplantation.
    Authors: Roper Et al.
    Nat Protoc  2018;13:217
  34. IL-1-induced JAK/STAT signaling is antagonized by TGF-beta to shape CAF heterogeneity in pancreatic ductal adenocarcinoma.
    Authors: Biffi Et al.
    Cancer Discov  2018;
  35. NODAL Secures Pluripotency upon Embryonic Stem Cell Progression from the Ground State.
    Authors: Mulas Et al.
    Stem Cell Reports  2017;9:77
  36. Enhanced Development of Skeletal Myotubes from Porcine Induced Pluripotent Stem Cells.
    Authors: Genovese
    Sci Rep  2017;7:41833
  37. Zfp281 is essential for mouse epiblast maturation through transcriptional and epigenetic control of Nodal signaling.
    Authors: Huang Et al.
    Elife  2017;6
  38. Organoid culture of human prostate cancer cell lines LNCaP and C4-2B.
    Authors: Ma Et al.
    Am J Clin Exp Urol  2017;5:25
  39. Establishment of mouse expanded potential stem cells.
    Authors: Yang Et al.
    Nature  2017;550:393
  40. In vivo genome editing and organoid transplantation models of colorectal cancer and metastasis.
    Authors: Roper Et al.
    Nat Biotechnol  2017;35:569
  41. Induced Pluripotent Stem Cell-Derived Dopaminergic Neurons from Adult Common Marmoset Fibroblasts.
    Authors: Vermilyea Et al.
    Stem Cells Dev  2017;26:1225
  42. Constitutively Active SMAD2/3 Are Broad-Scope Potentiators of Transcription-Factor-Mediated Cellular Reprogramming.
    Authors: Ruetz Et al.
    Cell Stem Cell  2017;21:791
  43. Enhancer Reprogramming Promotes Pancreatic Cancer Metastasis.
    Authors: Roe Et al.
    Cell  2017;170:875
  44. Epigenetic resetting of human pluripotency.
    Authors: Guo Et al.
    Development  2017;144:2748
  45. Immunopathology of childhood celiac disease-Key role of intestinal epithelial cells.
    Authors: Pietz Et al.
    PLoS One  2017;12:e0185025
  46. Anti-tumor activity of SL4 against breast cancer cells: induction of G2/M arrest through modulation of the MAPK-dependent p21 signaling pathway.
    Authors: Wang Et al.
    Sci Rep  2016;6:36486
  47. Angiopoietin-like 4 promotes angiogenesis in the tendon and is increased in cyclically loaded tendon fibroblasts.
    Authors: Mousavizadeh Et al.
    J Physiol  2016;594:2971
  48. Dual SMAD Signaling Inhibition Enables Long-Term Expansion of Diverse Epithelial Basal Cells
    Authors: Mou Et al.
    Cell: Stem Cell  2016;19:217
  49. Pharmacological reprogramming of fibroblasts into neural stem cells by signaling-directed transcriptional activation.
    Authors: Zhang Et al.
    Cell Stem Cell  2016;18(653)
  50. Human Enteroids as a Model of Upper Small Intestinal Ion Transport Physiology and Pathophysiology.
    Authors: Foulke-Abel Et al.
    Nat Protoc  2016;150:638
  51. Inhibition of TGFβ cell signaling for limbal explant culture in serumless, defined xeno-free conditions.
    Authors: Zamudio Et al.
    Exp Eye Res  2016;145:48
  52. Organoid culture systems for prostate epithelial and cancer tissue.
    Authors: Drost Et al.
    Proc Natl Acad Sci U S A  2016;11:347
  53. High-efficiency reprogramming of fibroblasts into cardiomyocytes requires suppression of pro-fibrotic signalling.
    Authors: Zhao Et al.
    Nat Commun  2015;6:8243
  54. Amnion cell mediated immune modulation following bleo. challenge: controlling the regulatory T cell response.
    Authors: Tan Et al.
    Stem Cell Res Ther  2015;6:8
  55. Disease Modeling and Gene Therapy of Copper Storage Disease in Canine Hepatic Organoids.
    Authors: Nantasanti Et al.
    Stem Cell Res  2015;5:895
  56. CPM Is a Useful Cell Surface Marker to Isolate Expandable Bi-Potential Liver Progenitor Cells Derived from Human iPS Cells.
    Authors: Kido Et al.
    Inflamm Bowel Dis  2015;5:508
  57. Transcription factor binding dynamics during human ES cell differentiation.
    Authors: Tsankov Et al.
    Stem Cell Reports  2015;518:344
  58. Targeted disruption of DNMT1, DNMT3A and DNMT3B in human embryonic stem cells.
    Authors: Liao Et al.
    Cell  2015;47:469
  59. TGFβ loss activates ADAMTS-1-mediated EGF-dependent invasion in a model of esophageal cell invasion.
    Authors: Bras Et al.
    Nat Genet  2015;330:29
  60. HD iPSC-derived neural progenitors accumulate in culture and are susceptible to BDNF withdrawal due to glutamate toxicity.
    Authors: Mattis Et al.
    Exp Cell Res  2015;24:3257
  61. Microbial Disruption of Autophagy Alters Expression of the RISC Component AGO2, a Critical Regulator of the miRNA Silencing Pathway.
    Authors: Sibony Et al.
    Proc Natl Acad Sci U S A  2015;21:2778
  62. Maintenance and neuronal differentiation of chicken induced pluripotent stem-like cells.
    Authors: Dai Et al.
    Stem Cells Int  2015;2014:182737
  63. Organoid models of human and mouse ductal pancreatic cancer.
    Authors: Boj Et al.
    Cell  2015;160:324
  64. Long-term culture of genome-stable bipotent stem cells from adult human liver.
    Authors: Huch Et al.
    Nature  2015;160:299
  65. Heightened potency of human pluripotent stem cell lines created by transient BMP4 exposure.
    Authors: Yang Et al.
    Stem Cell Reports  2015;112:E2337
  66. Preserved genetic diversity in organoids cultured from biopsies of human colorectal cancer metastases.
    Authors: Weeber Et al.
    Hum Mol Genet  2015;112:13308
  67. PMA induces SnoN proteolysis and CD61 expression through an autocrine mechanism.
    Authors: Li Et al.
    Cell Signal  2014;26:1369
  68. β-Cell differentiation of human pancreatic duct-derived cells after in vitro expansion.
    Authors: Corritore Et al.
    Cell Cycle  2014;16:456
  69. Mechanism-based corrector combination restores δF508-CFTR folding and function.
    Authors: Okiyoneda Et al.
    Nat Chem Biol  2013;9:444
  70. Generation of BAC transgenic epithelial organoids.
    Authors: Schwank Et al.
    Cell Reprogram  2013;8:e76871
  71. An in vitro expansion system for generation of human iPS cell-derived hepatic progenitor-like cells exhibiting a bipotent differentiation potential.
    Authors: Yanagida Et al.
    PLoS One  2013;8:e67541
  72. High-resolution analysis with novel cell-surface markers identifies routes to iPS cells.
    Authors: O'Malley Et al.
    Nature  2013;499:88
  73. Immunosurveillance against tetraploidization-induced colon tumorigenesis.
    Authors: Boilàve Et al.
    Proc Natl Acad Sci U S A  2013;12:473
  74. Generation of organized anterior foregut epithelia from pluripotent stem cells using small molecules.
    Authors: Kearns Et al.
    PLoS One  2013;11:1003
  75. Differential regulation of Smad3 and of the type II transforming growth factor-β receptor in mitosis: implications for signaling.
    Authors: Hirschhorn Et al.
    PLoS One  2012;7:e43459
  76. Porcine induced pluripotent stem cells analogous to naïve and primed embryonic stem cells of the mouse.
    Authors: Telugu Et al.
    Int J Dev Biol  2011;54:1703
  77. Generation of genetically modified rats from embryonic stem cells.
    Authors: Kawamata and Ochiya
    Nature  2010;107:14223


No product specific FAQs exist for this product, however you may

View all Small Molecule FAQs

Reviews for A 83-01

Average Rating: 4.8 (Based on 10 Reviews)

5 Star
4 Star
3 Star
2 Star
1 Star

Have you used A 83-01?

Submit a review and receive an Amazon gift card.

$25/€18/£15/$25CAN/¥75 Yuan/¥1250 Yen for a review with an image

$10/€7/£6/$10 CAD/¥70 Yuan/¥1110 Yen for a review without an image

Submit a Review

Filter by:

Works perfectly
By Toni Johansson on 04/01/2021
Application: Species: Human

To grow primary basal cells

Works well with liver organoids
By Gautam Kok on 11/19/2020
Application: Species: Human

Used in expansion medium for culturing liver organoids

It worked good
By Anonymous on 07/04/2020
Application: Species: Mouse

Reprogramming media comprises of 3 μM CHIR99021 and 0.5 μM A-83-01.

PMID: 29681516

For TGFB inhibition
By Anonymous on 06/25/2020
Application: Species: Mouse

Cells are treated with 1 mM A83-01 to inhibit canonical TGFB signaling

PMID: 27133794

Neural Induction Conditions
By Anonymous on 03/22/2020
Application: Species: Human

2 μM A83–01

PMID: 30656621

To start reprogramming, cultures were switched to reprogramming medium (ES medium supplemented with 1 mM A83-01)
By Anonymous on 12/04/2019
Application: Species: Mouse

To start reprogramming, cultures were switched to reprogramming medium (ES medium supplemented with 10 mM Parnate, 3 mM Chir99021, 1 mM A83-01, and 10 mM Forskolin)

PMID: 29358044

good for cell culture
By Anonymous on 10/08/2019
Application: Species: Mouse

add to cell culture to do 3d culture


works great for TGFB inhibition
By Anonymous on 08/08/2019
Application: Species: Human

used it to grow primary basal cells

PMID: 27320041

for growing cells
By Anonymous on 02/28/2019
Application: Species: Human

used it to grow human airway basal cells

A 83-01 Inhibit TGFb1-activated Cellular Fibrosis in Human Mϋller Cells
By Ying Yu on 01/08/2018
Application: Species: Human

Human MOI-M1 Mϋller cells seeded in tissue culture (TC)-treated plastic plate (BD). Serum starvation by DMEM medium supplemented with 1% FBS for 24h. Pretreated Human Mϋller cell with A83-01 at 0, 0.25, 0.5, 1 and 2uM for 2h. Then added 0-10 ng/mL TGFb1 for 48h. Picro-Sirius red staining, elution, and OD 540nm measurement for the fibrosis

Tocris Bioscience is the leading supplier of novel and exclusive tools for life science research with over 30 years' experience in the industry. Tocris is a Bio-Techne brand.