Ionis Pharmaceuticals, Inc. (Nasdaq: IONS) presented positive results from a planned 35-week interim analysis of the Phase 3 NEURO-TTRansform study of Ionis and AstraZeneca’s eplontersen in patients with hereditary transthyretin-mediated amyloid polyneuropathy (ATTRv-PN). In the study, eplontersen demonstrated a statistically significant and clinically meaningful change from baseline for its co-primary and secondary efficacy endpoints compared to the external placebo group. Eplontersen demonstrated a favorable safety and tolerability profile. The study results were presented today at the International Symposium on Amyloidosis (ISA) in Heidelberg, Germany.

In the study, eplontersen achieved an 81.2% (p<0.0001) mean reduction in the co-primary endpoint of serum transthyretin (TTR) concentration compared to baseline, demonstrating reduced TTR protein production. Eplontersen also demonstrated a significant treatment effect on the co-primary endpoint of modified Neuropathy Impairment Score +7 (mNIS+7), a measure of neuropathic disease progression, with a statistically significant difference in mean change from baseline versus the external placebo group (p<0.0001). The study also met its key secondary endpoint of change from baseline in the Norfolk Quality of Life Questionnaire-Diabetic Neuropathy (Norfolk QoL-DN), showing that treatment with eplontersen significantly improved patient-reported quality of life compared to the external placebo group (p<0.0001).

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