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Chem Biol February 25, 2011; 18 (2): 252-63.
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Heterotaxin: a TGF-β signaling inhibitor identified in a multi-phenotype profiling screen in Xenopus embryos.

Dush MK , McIver AL , Parr MA , Young DD , Fisher J , Newman DR , Sannes PL , Hauck ML , Deiters A , Nascone-Yoder N .

Disruptions of anatomical left-right asymmetry result in life-threatening heterotaxic birth defects in vital organs. We performed a small molecule screen for left-right asymmetry phenotypes in Xenopus embryos and discovered a pyridine analog, heterotaxin, which disrupts both cardiovascular and digestive organ laterality and inhibits TGF-β-dependent left-right asymmetric gene expression. Heterotaxin analogs also perturb vascular development, melanogenesis, cell migration, and adhesion, and indirectly inhibit the phosphorylation of an intracellular mediator of TGF-β signaling. This combined phenotypic profile identifies these compounds as a class of TGF-β signaling inhibitors. Notably, heterotaxin analogs also possess highly desirable antitumor properties, inhibiting epithelial-mesenchymal transition, angiogenesis, and tumor cell proliferation in mammalian systems. Our results suggest that assessing multiple organ, tissue, cellular, and molecular parameters in a whole organism context is a valuable strategy for identifying the mechanism of action of bioactive compounds.

PubMed ID: 21338922
PMC ID: PMC3050558
Article link: Chem Biol
Grant support: [+]

References [+] :
Adams, Early, H+-V-ATPase-dependent proton flux is necessary for consistent left-right patterning of non-mammalian vertebrates. 2006, Pubmed, Xenbase