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aTyr is a biotherapeutics company engaged in the discovery and development of innovative medicines based on novel biological pathways.

Our focus is on a newly discovered area of biology, the extracellular functionality of tRNA synthetases. Built on more than a decade of foundational science in this area, we have built a global intellectual property estate directed to all 20 human tRNA synthetases, with over 300 protein compositions patented.

Our lead clinical product candidate, ATYR1923, is a potential first-in-class immunomodulator for inflammatory lung diseases. We are developing ATYR1923 as a potential disease-modifying therapy for patients with interstitial lung diseases (ILDs), a group of rare immune-mediated disorders that cause progressive fibrosis of the lung interstitium and have a high unmet medical need. We are currently enrolling patients in a Phase 1b/2a clinical trial in pulmonary sarcoidosis, a major form of ILD. The study has been designed to evaluate the safety, tolerability, steroid sparing effect and immunogenicity of multiple doses of ATYR1923 and to evaluate established clinical endpoints and certain biomarkers to assess preliminary clinical activity of ATYR1923. The results of this study will guide future development of ATYR1923 in pulmonary sarcoidosis and provide insight for the potential of ATYR1923 in other ILDs such as chronic hypersensitivity pneumonitis (CHP) and connective tissue disease related ILD (CTD-ILD).

In response to the COVID-19 pandemic, we recently initiated a Phase 2 study of ATYR1923 in COVID-19 patients with severe respiratory complications. The study has been designed to evaluate the safety and preliminary efficacy of ATYR1923 as compared to placebo through the assessment of key clinical outcome measures such as fever and hypoxia as well as inflammatory biomarkers.

We are also advancing our pre-clinical pipeline of NRP-2 targeting antibodies for cancer and inflammation and new tRNA synthetase candidates through internal research efforts, industry and academic collaborations.

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