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Prescribing information WAINZUA®▼(eplontersen)
Adverse Event Reporting

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WAINZUA®▼(eplontersen) Mechanism of action

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WAINZUA mechanism of action

WAINZUA is indicated for the treatment of hereditary transthyretin-mediated amyloidosis (ATTRv amyloidosis) in adult patients with Stage 1 and 2 polyneuropathy.1

WAINZUA is a TTR gene silencer designed to directly bind to hepatocytes and reduce the production of TTR protein.1 

How WAINZUA reduces TTR protein production in the liver

How WAINZUA reduces TTR protein production in the liver

The TTR protein, which can misfold to cause ATTR amyloidosis, is primarily synthesised by the liver and normally circulates as a tetramer involved in transporting vitamin A and thyroxine.4,5


WAINZUA uses GalNAc ligand-conjugated antisense (LICA) technology, where the antisense oligonucleotide (ASO) is conjugated to the ligand

N-acetylgalactosamine. Due to this structure, WAINZUA is designed for targeted and enhanced uptake by hepatocytes, the primary source of systemically circulating TTR protein.2,6


Once within hepatocytes, WAINZUA selectively binds to the TTR mRNA causing the degradation of both the mutant and wild-type TTR mRNA. This prevents the synthesis of TTR protein in the liver, resulting in significant reductions in the levels of mutated and wild-type TTR protein secreted by the liver
into circulation.1,6


WAINZUA is the only TTR silencer with LICA technology enabling direct binding to hepatocytes, targeting ASGP receptors on the cell surface.1-3,6,7 
The clinical benefit of WAINZUA was demonstrated in the NEURO-TTRansform Phase III clinical study.1,6

Learn how WAINZUA’s mechanism of action impacts patients with ATTRv-PN

By lowering serum TTR levels, WAINZUA helps to slow the accumulation of amyloid fibrils, which contribute to the progression of neuropathy and cardiac complications in patients with mixed phenotypic presentation of ATTRv amyloidosis.1,6,8–10

Learn more about how WAINZUA
impacts patient outcomes

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If you have any questions about WAINZUA or would like to speak to an AstraZeneca representative, please contact us.

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ASGP=asialglycoprotein; ASO=antisense oligonucleotide; ATTRv=hereditary transthyretin amyloidosis; ATTRv-PN=hereditary transthyretin amyloidosis with polyneuropathy; GaINAc=N acetyl galactosamine; LICA=ligand conjugated antisense; mRNA=messenger ribonucleic acid; TTR=transthyretin.

  1. WAINZUA® (eplontersen) Summary of Product Characteristics.
  2. Viney NJ, et al. ESC Heart Fail. 2021;8(1):652–661.
  3. Crooke ST, et al. Nucleic Acid Ther. 2019;29(1):16–32.
  4. Ando Y, et al. Orphanet J Rare Dis. 2013;8(1):31.
  5. Ioannou A, et al. BioDrugs. 2023;37(2):127–142.
  6. Coelho T, et al. JAMA. 2023;330(15):1448–1458.
  7. Coelho T, et al. Neurol Ther. 2021;10(1):375–389.
  8. Adams D, et al. J Neurol. 2021;268(6):2109–2122.
  9. Planté-Bordeneuve V and Said G. Lancet Neurol. 2011;10(12):1086–1097.
  10. Nie T. Drugs. 2024;84(4):473–478.

GB-68497 | November 2025

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