Savara Presented New Data From Pivotal Phase 3 IMPALA-2 Trial of Molgramostim Inhalation Solution (Molgramostim) in Patients With Autoimmune Pulmonary Alveolar Proteinosis (aPAP) at American Thoracic Society Conference (ATS) 2025

Poster Title: Molgramostim Reduces Surfactant Burden and Number of Whole Lung Lavage Procedures in Patients with Autoimmune Pulmonary Alveolar Proteinosis (aPAP): Results From the IMPALA-2 Phase 3 Clinical Trial
Presenter: Tisha S. Wang, M.D., Professor of Clinical Medicine, Senior Executive Clinical Vice Chair, University of California Los Angeles Department of Medicine
Poster Number: 918
Poster Location: PD05, Room 3009/3011 West Building, Level 3

Summary:

• Molgramostim reduced surfactant burden as measured by ground-glass opacification (GGO) scores, a radiological measure of surfactant burden. The mean reduction in GGO score from baseline to Week 24 was greater in the molgramostim group (n=78) than in the placebo group (n=79) (-2.1 vs. -1.1; P=0.0004)
• Fewer patients in the molgramostim group required rescue whole lung lavages (WLL) compared with placebo. During the 48-week double-blind treatment period, 6 patients (7.4%) in the molgramostim group underwent a total of 15 WLLs and 11 patients (13.3%) in the placebo group underwent a total of 24 WLLs
• Molgramostim reduces pulmonary surfactant burden, which drives the clinical manifestations of aPAP, and provides support for the potential beneficial treatment effect of molgramostim

Poster Title: The Effects of Molgramostim on Respiratory Health-related Quality of Life and Patient-reported Outcomes in Patients with Autoimmune Pulmonary Alveolar Proteinosis (aPAP)
Presenter: Ali Ataya, M.D., Associate Professor of Medicine, University of Florida, Division of Pulmonary and Critical Care Medicine
Poster number: P31
Poster Location: TP22, Area A, Hall F (North Building, Exhibition Level)

Summary:

• Molgramostim showed benefit on measures of health-related quality of life (HRQoL) and patients’ assessment of breathing problems and physical activity, including changes from baseline in St. George’s Respiratory Questionnaire (SGRQ) Impact and Symptom scores, the EuroQol 5 Dimensions, 5 Levels (EQ-5D-5L), Patient Global Impression of Severity (PGIS), and Patient Global Impression of Change (PGIC) at Weeks 24 and 48, which were included as exploratory endpoints in the trial
• Molgramostim improved respiratory HRQoL as measured by changes from baseline to Week 24 in SGRQ Impact (P=0.0084) and Symptom scores compared with placebo, and the EQ-5D-5L, a generic HRQoL instrument comprised of a short descriptive system questionnaire that allows patients to rate their health across 5 dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. Odds ratios of responses on the EQ-5D-5L numerically favored the molgramostim group on 3 of the 5 dimensions (mobility, self-care, and usual activities) at Weeks 24 and 48
• Molgramostim reduced the severity of breathing problems, as assessed by PGIS, at both Weeks 24 (P=0.0305) and 48 (P=0.0049). Additionally, more molgramostim patients reported improvements in overall change in daily physical activity level, as measured by more patients assessing themselves as “Much better” or “A little better” compared with placebo at Week 24 (P=0.0368) and Week 48 (P=0.0193)

The abstracts were published in a supplement of the American Journal of Respiratory and Critical Care Medicine. For more details about the ATS International Conference please visit their website.