This study will see if the experimental medicine MTX-463 can slow or stop idiopathic pulmonary fibrosis (IPF) from worsening in people at least 40 years of age or older. Participants will receive either MTX-463 or a placebo (which contains no active drug) through an intravenous infusion once every 4 weeks, for a total of 6 infusions. Overall, participants will attend a total of 9 visits over the course of approximately 32 weeks, or roughly 8 months.

The purpose of this research study is to determine the best treatment goals for patients with active CD. Researchers are investigating how treating and monitoring CD to meet specific treatment goals will keep your disease under control (remission) and decrease complications such as hospitalizations and surgeries. Group 1 treatment goals include IUS response (if the drug is improving your CD) and IUS assessed transmural healing (healing of all bowel layers), clinical remission (normalization of CD symptoms), and biomarker remission (improvement in stool and blood tests that show inflammation). Group 2 treatment goals include clinical remission and biomarker remission. Comparing the treatment goals in these groups may inform doctors how best to manage CD in the future. Approximately 304 people will be enrolled in this study. This research study will involve receiving 300 mg of vedolizumab as an intravenous (IV) infusion into your arm at Weeks 0, 2, 6, 10, and 14, then every 4 or 8 weeks thereafter.