On November 6, 2025 aTyr Pharma, Inc. (Nasdaq: ATYR) ("aTyr" or the "Company"), a clinical stage biotechnology company engaged in the discovery and development of first-in-class medicines from its proprietary tRNA synthetase platform, reported third quarter 2025 results and provided a corporate update.

Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:

Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing

                  Schedule Your 30 min Free Demo!

"In September, we announced results from our Phase 3 EFZO-FIT study of efzofitimod in pulmonary sarcoidosis, a major form of interstitial lung disease (ILD). While we did not meet the primary endpoint, efzofitimod is the first investigational therapy to exhibit improvements in quality of life across multiple disease-related health outcomes while also reducing steroid burden in patients with pulmonary sarcoidosis," said Sanjay S. Shukla, M.D., M.S., President and Chief Executive Officer of aTyr. "Treatment options for pulmonary sarcoidosis are limited and can include a significant reliance on the use of oral corticosteroids, which often have significant side effects. There remains an urgent need for a new safe and effective treatment for patients with chronic, symptomatic disease."

"Based on the findings from EFZO-FIT, we believe there is drug activity for efzofitimod as evidenced by improvements across multiple clinically relevant efficacy measures. Based on this, coupled with the ongoing high unmet medical need in pulmonary sarcoidosis, we plan to meet with the U.S. Food and Drug Administration (FDA) in the first quarter of 2026 to review the results of the study and determine the path forward for efzofitimod in pulmonary sarcoidosis. We plan to provide an update regarding the next steps for the program following that meeting."

Third Quarter 2025 and Subsequent Period Highlights

Reported results from the global Phase 3 EFZO-FIT study to evaluate the efficacy and safety of 3.0 mg/kg and 5.0 mg/kg of efzofitimod or placebo in 268 patients with pulmonary sarcoidosis. The study did not meet its primary endpoint of change from baseline in mean daily oral corticosteroid dose at week 48. Clinical benefit for 5.0 mg/kg efzofitimod was observed across multiple pre-specified study efficacy parameters at week 48 compared to placebo, including the King’s Sarcoidosis Questionnaire (KSQ)-Lung score, KSQ-General Health score, Fatigue Assessment Scale, and complete steroid withdrawal and improvement in KSQ-Lung score. Additionally, treatment with efzofitimod maintained lung function as a measure of forced vital capacity and was well-tolerated with a safety profile consistent with prior trials conducted to date. Based on these findings, the Company plans to meet with the FDA in the first quarter of 2026 to review the results and determine the path forward for efzofitimod in pulmonary sarcoidosis.
Presented the results from the Phase 3 EFZO-FIT study in a late-breaking oral abstract at the European Respiratory Society Congress 2025, which took place September 27 – October 1, 2025, in Amsterdam, Netherlands. Daniel Culver, D.O., Chair of the Department of Pulmonary Medicine at the Cleveland Clinic and principal investigator of the study, delivered the presentation, titled "EFZO-FIT: The Largest Ever Interventional Trial in Pulmonary Sarcoidosis."
Enrollment is progressing in the Phase 2 EFZO-CONNECT study to evaluate the efficacy, safety and tolerability of efzofitimod in patients with limited or diffuse systemic sclerosis (SSc, or scleroderma)-related ILD (SSc-ILD). This proof-of-concept study is a randomized, double-blind, placebo-controlled, 28-week study consisting of three parallel cohorts randomized 2:2:1 to either 270 mg or 450 mg of efzofitimod or placebo administered intravenously monthly for a total of six doses. The study intends to enroll up to 25 patients at multiple centers in the United States. Promising interim data from the study were reported in the second quarter of 2025, and the Company expects to complete enrollment in the study in the first half of 2026.
Presented at the Federation of European Biochemical Societies (FEBS) Special Meeting, "Expanding frontiers in aminoacyl-tRNA synthetase research," which took place September 28 – October 3, 2025, in Dubrovnik, Croatia. Leslie Nangle, Ph.D., Vice President of Research at aTyr, delivered a presentation titled, "Advancing a therapeutic platform based on tRNA synthetases for treatment of fibrotic lung diseases."
Third Quarter 2025 Financial Highlights and Cash Position

Cash & Investment Position: Cash, cash equivalents, restricted cash and available-for-sale investments as of September 30, 2025, were $92.9 million.
R&D Expenses: Research and development expenses were $22.1 million for the third quarter 2025, which consisted primarily of clinical trial costs for the Phase 3 EFZO-FIT and Phase 2 EFZO-CONNECT studies, manufacturing costs for a potential Biologics License Application (BLA) filing and commercial supply for the efzofitimod program, and research and development costs for the efzofitimod and discovery programs.
G&A Expenses: General and administrative expenses were $4.8 million for the third quarter 2025.
About Efzofitimod

Efzofitimod is a novel biologic immunomodulator in clinical development for the treatment of interstitial lung disease (ILD), a group of immune-mediated disorders that can cause inflammation and fibrosis, or scarring, of the lungs. Efzofitimod is a tRNA synthetase derived therapy that selectively modulates activated myeloid cells through neuropilin-2 to resolve inflammation without immune suppression and potentially prevent the progression of fibrosis. In addition to the global Phase 3 EFZO-FIT study of efzofitimod in patients with pulmonary sarcoidosis, a major form of ILD, efzofitimod is also being investigated in the Phase 2 EFZO-CONNECT study in patients with systemic sclerosis (SSc, or scleroderma)-related ILD. These forms of ILD have limited therapeutic options and there is a need for safer and more effective, disease-modifying treatments that improve outcomes.

(Press release, aTyr Pharma, NOV 6, 2025, View Source [SID1234659608])