4his Citations

AG10 inhibits amyloidogenesis and cellular toxicity of the familial amyloid cardiomyopathy-associated V122I transthyretin.

Abstract

The misassembly of soluble proteins into toxic aggregates, including amyloid fibrils, underlies a large number of human degenerative diseases. Cardiac amyloidoses, which are most commonly caused by aggregation of Ig light chains or transthyretin (TTR) in the cardiac interstitium and conducting system, represent an important and often underdiagnosed cause of heart failure. Two types of TTR-associated amyloid cardiomyopathies are clinically important. The Val122Ile (V122I) mutation, which alters the kinetic stability of TTR and affects 3% to 4% of African American subjects, can lead to development of familial amyloid cardiomyopathy. In addition, aggregation of WT TTR in individuals older than age 65 y causes senile systemic amyloidosis. TTR-mediated amyloid cardiomyopathies are chronic and progressive conditions that lead to arrhythmias, biventricular heart failure, and death. As no Food and Drug Administration-approved drugs are currently available for treatment of these diseases, the development of therapeutic agents that prevent TTR-mediated cardiotoxicity is desired. Here, we report the development of AG10, a potent and selective kinetic stabilizer of TTR. AG10 prevents dissociation of V122I-TTR in serum samples obtained from patients with familial amyloid cardiomyopathy. In contrast to other TTR stabilizers currently in clinical trials, AG10 stabilizes V122I- and WT-TTR equally well and also exceeds their efficacy to stabilize WT and mutant TTR in whole serum. Crystallographic studies of AG10 bound to V122I-TTR give valuable insights into how AG10 achieves such effective kinetic stabilization of TTR, which will also aid in designing better TTR stabilizers. The oral bioavailability of AG10, combined with additional desirable drug-like features, makes it a very promising candidate to treat TTR amyloid cardiomyopathy.

Reviews - 4his mentioned but not cited (1)

Articles - 4his mentioned but not cited (5)

  1. AG10 inhibits amyloidogenesis and cellular toxicity of the familial amyloid cardiomyopathy-associated V122I transthyretin. Penchala SC, Connelly S, Wang Y, Park MS, Zhao L, Baranczak A, Rappley I, Vogel H, Liedtke M, Witteles RM, Powers ET, Reixach N, Chan WK, Wilson IA, Kelly JW, Graef IA, Alhamadsheh MM. Proc Natl Acad Sci U S A 110 9992-9997 (2013)
  2. Repositioning tolcapone as a potent inhibitor of transthyretin amyloidogenesis and associated cellular toxicity. Sant'Anna R, Gallego P, Robinson LZ, Pereira-Henriques A, Ferreira N, Pinheiro F, Esperante S, Pallares I, Huertas O, Almeida MR, Reixach N, Insa R, Velazquez-Campoy A, Reverter D, Reig N, Ventura S. Nat Commun 7 10787 (2016)
  3. Overcoming universal restrictions on metal selectivity by protein design. Choi TS, Tezcan FA. Nature 603 522-527 (2022)
  4. Molecular dynamics simulation study of AG10 and tafamidis binding to the Val122Ile transthyretin variant. Morris KF, Geoghegan RM, Palmer EE, George M, Fang Y. Biochem Biophys Rep 21 100721 (2020)
  5. Molecular Determinants of Filament Capping Proteins Required for the Formation of Functional Flagella in Gram-Negative Bacteria. Nedeljković M, Postel S, Pierce BG, Sundberg EJ. Biomolecules 11 1397 (2021)


Reviews citing this publication (39)

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  4. Enthalpy-Driven Stabilization of Transthyretin by AG10 Mimics a Naturally Occurring Genetic Variant That Protects from Transthyretin Amyloidosis. Miller M, Pal A, Albusairi W, Joo H, Pappas B, Haque Tuhin MT, Liang D, Jampala R, Liu F, Khan J, Faaij M, Park M, Chan W, Graef I, Zamboni R, Kumar N, Fox J, Sinha U, Alhamadsheh M. J Med Chem 61 7862-7876 (2018)
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