CGAS and pulmonary fibrosis: To address a potential role for self-DNA recognition by the cGAS/STING pathway in the establishment of pulmonary fibrosis, we measured double stranded (ds) DNA content in the bronchoalveolar lavage fluid (BALF) as well as cGAS and STING expressions in the lungs at the fibrotic phase (14 days after BLM instillation).