07/09/2026
𝑼𝒑𝒅𝒂𝒕𝒆 𝒐𝒏 𝑪𝑨𝑹𝑫𝑰𝑶-𝑻𝑻𝑹𝒂𝒏𝒔𝒇𝒐𝒓𝒎 (𝒆𝒑𝒍𝒐𝒏𝒕𝒆𝒓𝒔𝒆𝒏):
AstraZeneca and Ionis Pharmaceuticals, Inc. released results today from CARDIO-TTRansform, a Phase III trial of eplontersen in . Here's what we know so far.
𝗔𝗯𝗼𝘂𝘁 𝘁𝗵𝗲 𝘀𝘁𝘂𝗱𝘆: Over 1,400 ATTR-CM patients were enrolled to test whether adding eplontersen, a monthly injectable, to standard care would reduce cardiovascular death and recurrent heart-related events compared to placebo.
𝗪𝗵𝗮𝘁 𝘄𝗮𝘀 𝗳𝗼𝘂𝗻𝗱: The study's main goal was not met — overall, adding eplontersen did not significantly reduce the combined rate of cardiovascular death and heart-related events.
𝗦𝗼𝗺𝗲 𝗲𝗻𝗰𝗼𝘂𝗿𝗮𝗴𝗶𝗻𝗴 𝘀𝗶𝗴𝗻𝗮𝗹𝘀 𝗲𝗺𝗲𝗿𝗴𝗲𝗱 𝗲𝗹𝘀𝗲𝘄𝗵𝗲𝗿𝗲:
• Eplontersen produced large, sustained reductions in TTR protein levels, consistent with how this class of drugs is expected to work.
• Across secondary measures — including imaging and biomarker analyses — results generally favored eplontersen over placebo.
• In patients taking eplontersen without a stabilizer (like tafamidis), there were fewer heart-related events — described as nominally significant, meaning it's an early signal, not a confirmed result.
• Patients already on stabilizer therapy showed no added benefit from eplontersen.
Safety data were consistent with prior studies, with no new safety concerns identified.
𝗪𝗵𝗮𝘁 𝘄𝗲 𝗱𝗼𝗻'𝘁 𝗸𝗻𝗼𝘄 𝘆𝗲𝘁: Full data haven't been released yet. AstraZeneca and Ionis will present complete results at the European Society of Cardiology Congress in August 2026. Until then, it's unclear why the main goal wasn't met despite these favorable secondary findings, and what this means for treatment going forward.
𝗙𝗼𝗿 𝗽𝗮𝘁𝗶𝗲𝗻𝘁𝘀: This is a research update, not a treatment recommendation. These results concern eplontersen's investigational use in ATTR-CM only. Its approved use for hereditary ATTR polyneuropathy (ATTRv-PN) is unaffected.
We'll share more once full data are presented in August.
Source: AstraZeneca and Ionis press releases, July 9, 2026
https://ir.ionis.com/news-releases/news-release-details/update-cardio-ttransform-phase-3-trial-eplontersen-adults