Researchers want to learn more about tulisokibart (also known as MK-7240) in an extension study. Tulisokibart is a medicine designed to treat active, moderate to severe Crohn's disease (CD) and ulcerative colitis (UC). An extension study is a type of study where people who received tulisokibart in certain other studies for CD or UC (called a parent study) may be able to join this study. The goals of this study are to learn about the safety of tulisokibart over time in people with CD or UC, and if people tolerate it.
Has participated in a qualifying tulisokibart Phase 2 or Phase 3 parent study for CD or UC
The investigator determines that the participant derives clinical benefit from continued study intervention based upon clinical evaluations performed during their parent study
A participant assigned female sex at birth is not breastfeeding during the study intervention period and for at least 14 weeks after the last dose of study intervention
A participant of childbearing potential (POCBP) is not pregnant and has a negative highly sensitive pregnancy test (urine or serum) as required by local regulations within 24 hours (for a urine test) or 72 hours (for a serum test) before the first dose of study intervention
Has prematurely discontinued study intervention in their parent study
Has received any protocol-specified prohibited medications during their parent study
Has known allergies, hypersensitivity, or intolerance to tulisokibart or its excipients
Parallel
Tulisokibart
DrugHumanized monoclonal antibody that binds human tumor necrosis factor-like cytokine 1A (TL1A), administered subcutaneously
Placebo to tulisokibart
DrugPlacebo matching SC tulisokibart
Number of Participants Who Experience an Adverse Event (AE)
An AE is any untoward medical occurrence in a participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. The number of participants who experience an AE will be reported.
Number of Participants Who Discontinue Study Treatment Due to an AE
An AE is any untoward medical occurrence in a participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. The number of participants who discontinue study treatment due to an AE will be reported.
Percentage of Participants with Crohn's Disease Achieving Clinical Remission per Crohn's Disease Activity Index (CDAI) Score
The percentage of participants who enrolled in their parent study with Crohn's disease who achieve clinical remission, as defined by CDAI score \<150, at Week 364 will be presented.
Percentage of Participants with Crohn's Disease Achieving Clinical Remission per Stool Frequency and Abdominal Pain Score
The percentage of participants who enrolled in their parent study with Crohn's disease achieving clinical remission at Week 364 per stool frequency/abdominal pain score (SF/APS), as defined by average daily SF ≤2.8 and average daily APS ≤1.0 and both not greater than baseline will be presented.
Percentage of Participants with Crohn's Disease With Endoscopic Remission Per Simplified Endoscopic Score for Crohn's Disease (SES-CD)
The Simplified Endoscopic Score for Crohn's Disease (SES-CD) measures ileocolonoscopic findings in Crohn's Disease. Each segment of the ileo-colon (terminal ileum; ascending, transverse, and descending colon; rectum) is scored from 0 (normal or inactive disease) to 12 (severe disease; no more than one segment can have a score of 12, in which case the other 4 segments must each be ≤11), and the scores summed to produce an SES-CD ranging from 0 (overall least severe disease) to 56 (overall most severe disease). Endoscopic remission is defined as an SES-CD ≤4 and at least 2-point reduction from baseline and no subscore \>1 in any individual variable, as scored by central reader.
Percentage of Participants with Ulcerative Colitis Achieving Clinical Remission Per Modified Mayo Score (MMS)
The Modified Mayo Score (MMS) is a composite score of ulcerative colitis (UC) disease activity on a scale of increasing severity from 0-9, calculated by summing three subscores: Endoscopic subscore (ES), scored on a scale of increasing severity from 0 (normal or inactive disease) to 3 (severe disease, such as spontaneous bleeding or ulceration); Stool frequency subscore (SFS), scored on a scale of increasing frequency from 0 (normal number of stools) to 3 (≥5 stools more than normal per day for the participant); and rectal bleeding subscore (RBS), scored on a scale of increasing severity from 0 (no blood seen) to 3 (blood alone passed). Clinical Remission is defined as an ES of 0 or 1, RBS of 0, and SFS of 0 or 1 and not greater than the baseline SFS.
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