This is a randomized, double-blind, placebo-controlled clinical study to evaluate the safety and efficacy of 2 doses of AP01 versus placebo on top of standard of care in subjects with Progressive Pulmonary Fibrosis (PPF) over 52 weeks. Subjects will participate in the study for up to 58 weeks, inclusive of a Screening Period of up to 4 weeks, a 52-week Treatment Period, and a 2-week Follow-up Period that includes a Follow-up telephone call (TC) 2 weeks post final dose. Up to 300 eligible subjects will be randomized in a 2:1:2 ratio to 1 of 3 treatment arms: AP01 100 mg twice daily (BID), AP01 50 mg BID, or placebo BID (8 mL; two 4 mL blow-fill-seal [BFS] ampoules BID).

This is a randomized, double-blind, dose-ranging, placebo-controlled study to see how effectively and how safely two different doses of bexotegrast (160 and 320 mg) can be taken every day for 52 weeks (about 12 months) by subjects with IPF (Idiopathic Pulmonary Fibrosis) who are taking or not taking background therapy (other drugs for IPF include nintedanib or pirfenidone). The study is designed to test the study drug in subjects who are taking or not taking background therapy and will include about 80 subjects who are not taking background therapy at study entry. Subjects who are not taking background therapy at study entry will be allowed to start it at any time during the study. The study will consist of an up to 28-day Screening Period, a 52-week Treatment Period, and a 14-day Safety Follow-up Period. Participants will undergo an end-of-study visit at the end of the Safety Follow-up Period.

The study will be an open-label, randomized, parallel arm study that will include a
treatment arm and control arm. Participants will have clinic visits at screening, randomization (day 1) and weeks 4, 12, 18, and 24. After week 24, participants will have clinic visits at weeks 32, 40, and 48. Participants will also have a telehealth visit on day 2 and phone calls to assess adverse events (AEs), serious adverse events (SAEs), and review patient education will occur during weeks 5, 8, 36, and 44. The phone calls may be converted to telehealth visits or clinic visits and / or followed by clinic visits, if the study team deems it necessary. Pulmonary function testing, quality of life survey (St. George's Respiratory Questionnaire (SGRQ)), and blood draw will occur at each clinic visit.

The purpose of this research registry is to better understand the natural history of Idiopathic Pulmonary Fibrosis and current practice patterns. The IPF-PRO registry will be used to collect data and biological samples that will support future research studies by identifying disease biomarkers for IPF. Through these studies, researchers hope to find new ways to detect, treat, and maybe prevent or cure health problems. Some of these studies may be about how genes affect health and disease, or how a person's genes affect their response to a treatment. Some of these studies may lead to new products, such as drugs or tests for diseases. We are asking you to let us collect and store some of your blood and health information so they might be used in these kinds of future studies.

If you are newly diagnosed with IPF and are eligible for participation in IPF-PRO, you will be asked to sign a consent form to become enrolled if you agree to be in this registry. At enrollment a member of MUSC research staff will collect information from you and about your medical history and medical care, as well as information about the types of health insurance (public or private) that you have. As part of your participation in this registry, you will be required to sign a medical release form giving permission for your medical records to be reviewed for the purposes of data collection for the registry. This is an observational registry which means you will not receive any investigational treatments or investigational drugs, and only minimally invasive procedures will be performed (blood draws) at scheduled clinic visits. In addition to the face to face visits for self-administered participant reported questionnaires and blood collection, at roughly 6-month intervals, sites will review the participant's medical records. Your disease management and treatment decisions will be determined by you and your health care professional. Subjects will be followed until the last enrolled subject has been followed for 3 years up to a maximum of 5 years.