Intellia Therapeutics(US:NTLA)2025-10-27 13:30Summary of Intellia Therapeutics Conference Call (October 27, 2025) Company Overview - Company: Intellia Therapeutics (NasdaqGM: NTLA) - Focus: Development of gene-editing therapies, specifically for conditions like ATTR amyloidosis Key Points Discussed Safety Event in Clinical Trials - A safety event occurred in the Phase III clinical trial of NexSieve, leading to a protocol-specified pause in patient dosing and screening for the trial [3][5] - A patient with ATTR cardiomyopathy experienced elevated liver enzymes and bilirubin levels after receiving NexSieve, prompting immediate action to ensure patient safety [5][6] - The company is consulting with clinical investigators and external experts to assess the situation and ensure optimal care for the affected patient [6] Patient Enrollment and Trial Status - Over 650 patients with ATTR cardiomyopathy are enrolled in the magnitude trial, and 47 patients with ATTR polyneuropathy are enrolled in magnitude two [7] - More than 450 patients are estimated to have been dosed with NexSieve [7] - The Phase III HALO study for a different drug, lambozi, is not paused, and patient enrollment was completed in mid-September [7] Future Data and Updates - Long-term safety and efficacy data for lambozi will be reported in early November at the American College of Allergy, Asthma and Immunology Annual Scientific Meeting [7][8] - The company plans to share longer-term data from the Phase I trial of NexSieve, which includes updates on various disease measures and mortality [8] Investigative Actions and Monitoring - The company has mandated clinical sites to collect additional lab data from patients in the initial weeks following dosing to detect potential liver elevation sooner [6] - Ongoing engagement with global regulatory authorities is in place to finalize a plan for resuming enrollment as soon as appropriate [6][48] Clinical Trial Protocol and Regulatory Engagement - The pause in the trial was triggered by exceeding thresholds for transaminases and bilirubin levels [24][56] - The company clarified that they are not under a clinical hold from regulatory agencies; the pause is self-imposed to ensure safety [36][68] - Active engagement with the FDA is ongoing, and the company has not received indications of a formal hold being considered [68] Patient Characteristics and Risk Factors - The affected patient is in his eighties and has a high BMI, but no other preexisting liver conditions have been identified as contributing factors [63] - The company is exploring demographic indicators and potential immunological responses that could suggest patient risk [41] Conclusion and Next Steps - The company remains optimistic about the potential of NexSieve to address unmet medical needs despite the recent safety event [8] - Future updates will be provided during the upcoming Q3 results call and at scientific meetings [73][70] Additional Important Information - The company is currently assessing the underlying mechanisms of the adverse event and is considering various hypotheses [40][41] - The current steroid regimen for patients includes dexamethasone administered before and on the day of treatment, with no subsequent steroid administration planned at this time [52]