On October 10, Ionis Pharmaceuticals rose 5.31% in regular trading, reaching $45.60 per share with turnover of $76.08 million. The move was driven by the announcement that sefaxersen, its investigational therapy co-developed with Roche, met the primary endpoint in a pivotal Phase 3 study for adults with primary IgA nephropathy.
At week 37, sefaxersen demonstrated a statistically significant and clinically meaningful reduction in proteinuria compared to placebo, with a safety profile consistent with prior studies. The trial will continue to evaluate kidney function changes over two years, measured by estimated glomerular filtration rate at week 105. This news strengthens the outlook for Ionis' RNA-targeted pipeline, coming just one week after its ALS candidate ulefnersen also achieved its Phase 3 primary endpoint.
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