A 2-part study, comprising of a 36-week placebo-controlled period (PCP) and a 24-week open-label extension (OLE) period, to assess the efficacy and safety of 2 dose regimens of GB004 when added to background UC therapy of 5-aminosalicylate (5-ASA) with or without systemic steroids.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
236
Percentage of Participants With Clinical Remission at PCP Week 12
Clinical remission is defined as a Modified Mayo score ≤ 2, with a rectal bleeding subscore of 0, stool frequency subscore of 0 or 1 (with a ≥ 1 point decrease from baseline), and endoscopic subscore of 0 or 1. The Modified Mayo score is an endpoint measure composed of: Stool frequency, Rectal bleeding, and Endoscopic subscores (where the Endoscopic subscore value of 1 does not include friability), each ranging from 0 to 3, that are summed to give a total score ranging from 0 to 9 points, with higher scores indicating greater severity.
Time frame: At PCP Week 12
Percentage of Participants With a Treatment Emergent Adverse Event
An adverse event (AE) is any untoward medical occurrence in a participant, whether or not considered related to study treatment. Abnormal laboratory test results or other safety assessments, including those that worsened from baseline, that were considered clinically significant in the medical and scientific judgment of the investigator were to be reported as AEs. An AE was considered treatment-emergent to the OLE if it started on or after the first dose of OLE study treatment.
Time frame: From first dose of OLE study treatment through OLE Week 28
Percentage of Participants With Clinical Response at PCP Week 12
Clinical response is defined as a reduction in Modified Mayo score of ≥ 2 points and ≥ 35% from baseline, including a decrease in rectal bleeding subscore of ≥ 1 or absolute rectal bleeding subscore of ≤ 1. The Modified Mayo score is an endpoint measure composed of: Stool frequency, Rectal bleeding, and Endoscopic subscores (where the Endoscopic subscore value of 1 does not include friability), each ranging from 0 to 3, that are summed to give a total score ranging from 0 to 9 points, with higher scores indicating greater severity.
Time frame: At PCP Week 12
Percentage of Participants With Histologic Remission at PCP Week 12
Histologic remission is defined as Robarts Histopathology Index (RHI) ≤ 3 with lamina propria neutrophils RHI subscore = 0 and neutrophils in epithelium RHI subscore = 0. Histologic remission is evaluated among subjects with both baseline lamina propria neutrophils and neutrophils in epithelium RHI subscores \> 0. The RHI is a validated instrument that measures histologic disease activity and consists of 4 subscores (chronic inflammatory infiltrate, lamina propria neutrophils, neutrophils in epithelium, and erosion or ulceration). Each subscore ranges from 0-3, with higher subscores indicating greater histologic disease activity. The RHI score is calculated as: (1 x chronic inflammatory infiltrate) + (2 x lamina propria neutrophils) + (3 x neutrophils in epithelium) + (5 x erosion or ulceration). The RHI therefore ranges from 0-33, with higher scores indicating greater histologic disease activity.
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B G Clinical Research, Inc.
Encinitas, California, United States
Gastro Care Institute
Lancaster, California, United States
Texas Digestive Disease Consultants
Baton Rouge, Louisiana, United States
Gastroenterology Clinic of Acadiana
Lafayette, Louisiana, United States
Delta Research Partners
Monroe, Louisiana, United States
Huron Gastroenterology Associates
Ypsilanti, Michigan, United States
Mayo Clinic
Rochester, Minnesota, United States
Las Vegas Medical Research
Las Vegas, Nevada, United States
Freehold Endoscopy Associates, LLC d/b/a/ Endoscopy Center of Monmouth County
Freehold, New Jersey, United States
Great Lakes Gastroenterology Research, LLC
Mentor, Ohio, United States
...and 67 more locations
Time frame: At PCP Week 12
Percentage of Participants With Endoscopic Improvement at PCP Week 12
Endoscopic improvement is defined as an endoscopic subscore of 0 or 1. The endoscopic subscore is a component of the Modified Mayo score and is assessed on a 0-3 scale: 0 = Normal or inactive disease; 1 = Mild disease (erythema, decreased vascular pattern); 2 = Moderate disease (marked erythema, absent vascular pattern, friability, erosions); and 3 = Severe disease (spontaneous bleeding, ulceration). Higher scores indicate greater endoscopic disease severity. An endoscopic subscore of 1 does not include friability; an endoscopy with friability is assessed an endoscopic subscore of at least 2.
Time frame: At PCP Week 12
Percentage of Participants With Mucosal Healing at PCP Week 12
Mucosal healing is defined as endoscopic improvement and histologic remission. Please see Secondary Outcome Measure Descriptions above for Percentage of Participants With Endoscopic Improvement at PCP Week 12 and for Percentage of Participants With Histologic Remission at PCP Week 12 for information on the measures of endoscopic improvement and histologic remission, respectively.
Time frame: At PCP Week 12
Percentage of Participants With Clinical Remission at PCP Week 36
Clinical remission is defined as a Modified Mayo score ≤ 2, with a rectal bleeding subscore of 0, stool frequency subscore of 0 or 1 (with a ≥ 1 point decrease from baseline), and endoscopic subscore of 0 or 1. The Modified Mayo score is an endpoint measure composed of: Stool frequency, Rectal bleeding, and Endoscopic subscores (where the Endoscopic subscore value of 1 does not include friability), each ranging from 0 to 3, that are summed to give a total score ranging from 0 to 9 points, with higher scores indicating greater severity.
Time frame: At PCP Week 36
Percentage of Participants With Clinical Response at PCP Week 36
Clinical response is defined as a reduction in Modified Mayo score of ≥ 2 points and ≥ 35% from baseline, including a decrease in rectal bleeding subscore of ≥ 1 or absolute rectal bleeding subscore of ≤ 1. The Modified Mayo score is an endpoint measure composed of: Stool frequency, Rectal bleeding, and Endoscopic subscores (where the Endoscopic subscore value of 1 does not include friability), each ranging from 0 to 3, that are summed to give a total score ranging from 0 to 9 points, with higher scores indicating greater severity.
Time frame: At PCP Week 36
Percentage of Participants With Histologic Remission at PCP Week 36
Histologic remission is defined as Robarts Histopathology Index (RHI) ≤ 3 with lamina propria neutrophils RHI subscore = 0 and neutrophils in epithelium RHI subscore = 0. The RHI is a validated instrument that measures histologic disease activity and consists of 4 subscores (chronic inflammatory infiltrate, lamina propria neutrophils, neutrophils in epithelium, and erosion or ulceration). Each subscore ranges from 0-3, with higher subscores indicating greater histologic disease activity. The RHI score is calculated as: (1 x chronic inflammatory infiltrate) + (2 x lamina propria neutrophils) + (3 x neutrophils in epithelium) + (5 x erosion or ulceration). The RHI therefore ranges from 0-33, with higher scores indicating greater histologic disease activity.
Time frame: At PCP Week 36
Percentage of Participants With Endoscopic Improvement at PCP Week 36
Endoscopic improvement is defined as an endoscopic subscore of 0 or 1. The endoscopic subscore is a component of the Modified Mayo score and is assessed on a 0-3 scale: 0 = Normal or inactive disease; 1 = Mild disease (erythema, decreased vascular pattern); 2 = Moderate disease (marked erythema, absent vascular pattern, friability, erosions); and 3 = Severe disease (spontaneous bleeding, ulceration). Higher scores indicate greater endoscopic disease severity. An endoscopic subscore of 1 does not include friability; an endoscopy with friability is assessed an endoscopic subscore of at least 2.
Time frame: At PCP Week 36
Percentage of Participants With Mucosal Healing at PCP Week 36
Mucosal healing is defined as endoscopic improvement and histologic remission. Please see Secondary Outcome Measure Descriptions above for Percentage of Participants With Endoscopic Improvement at PCP Week 36 and for Percentage of Participants With Histologic Remission at PCP Week 36 for information on the measures of endoscopic improvement and histologic remission, respectively.
Time frame: At PCP Week 36