A Study Evaluating the Safety, Efficacy, and Pharmacodynamic Effects of ABT-981 in Patients With Knee Osteoarthritis

Phase 2

Completed

Conditions: Knee Osteoarthritis
Medial Compartment Knee Osteoarthritis

Interventions: Biological: ABT-981
Other: Placebo

Registration Number: NCT02087904

Lead Sponsor: AbbVie

Brief Summary: A Phase 2a, multicenter, randomized, double-blind, parallel group, placebo-controlled study to evaluate the safety, tolerability, efficacy and pharmacokinetic/pharmacodynamic effect of ABT-981 in patients with symptomatic, radiographic, and inflammatory knee osteoarthritis.

Detailed Description: Not available

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 350

Inclusion Criteria

Radiographic knee osteoarthritis with Kellgren-Lawrence Grade 2 or 3
Body Mass Index (BMI) 18-34 kg/m2
One or more clinical signs and symptoms of active inflammation in the index knee

Exclusion Criteria

History of allergic reaction to any constituents of the study drug, or to any Immunoglobulin G (IgG)-containing product
History of anaphylactic reaction to any agent
Significant trauma or surgery to the index knee
Severe knee malalignment
Any uncontrolled medical illness or an unstable treatment or therapy

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
ABT-981 low dose	ABT-981	25 mg ABT-981 subcutaneous (SC) every 2 weeks (E2W)
Placebo	Placebo	Placebo
ABT-981 medium dose	ABT-981	100 mg ABT-981 SC E2W
ABT-981 high dose	ABT-981	200 mg ABT-981 SC E2W

Primary Outcome Measures

Name	Time	Method
Change From Baseline in Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) Pain Scores of the Index Knee at Week 16	Baseline, Week 16	The WOMAC was developed to assess pain, stiffness, and physical function in subjects with hip and/or knee osteoarthritis. The WOMAC consists of 24 items divided into 3 subscales: Pain (5 items); Stiffness (2 items); and Physical Function (17 items). Each item is rated on an 11-point (0 to 10) numerical rating scale (NRS). The pain sub-score has a range of 0 (no pain) to 50 (maximum pain). A negative change from baseline indicates improvement.
Change From Baseline in Quantitative Synovitis of the Index Knee at Week 26	Baseline, Week 26	Change in synovitis of the index knee was evaluated using quantitative magnetic resonance imaging (MRI) measurements. MRI quantitative synovitis of the index knee was defined by mean synovial membrane thickness.
Change From Baseline in Effusion Volume of the Index Knee at Week 26	Baseline, Week 26
Change From Baseline in Whole-Organ Magnetic Resonance Imaging Score (WORMS) Semi-Quantitative Synovitis/Effusion Score of the Index Knee at Week 26	Baseline, Week 26	Semi-quantitative synovitis/effusion volume WORMS scores were scored as normal (0), \< 33% of maximum estimated distention (1), 33% - 66% of maximum estimated distention (2), or \> 66% of maximum estimated distention (3).

Secondary Outcome Measures

Name	Time	Method
Change From Baseline in WOMAC Physical Function Scores of the Index Knee at Week 16	Baseline, Week 16	The WOMAC was developed to assess pain, stiffness, and physical function in subjects with hip and/or knee osteoarthritis. The WOMAC consists of 24 items divided into 3 subscales: Pain (5 items); Stiffness (2 items); and Physical Function (17 items). Each item is rated on an 11-point (0 to 10) NRS. The WOMAC physical function subscale score was 0 (normal) to 170 (least physical function). A negative change from baseline indicates improvement.
Change From Baseline in WOMAC Physical Function Scores of the Index Knee at Week 26	Baseline, Week 26	The WOMAC was developed to assess pain, stiffness, and physical function in subjects with hip and/or knee osteoarthritis. The WOMAC consists of 24 items divided into 3 subscales: Pain (5 items); Stiffness (2 items); and Physical Function (17 items). Each item is rated on an 11-point (0 to 10) NRS. The WOMAC physical function subscale score was 0 (normal) to 170 (least physical function). A negative change from baseline indicates improvement.
Change From Baseline in WOMAC Physical Function Scores of the Index Knee at Week 52	Baseline, Week 52	The WOMAC was developed to assess pain, stiffness, and physical function in subjects with hip and/or knee osteoarthritis. The WOMAC consists of 24 items divided into 3 subscales: Pain (5 items); Stiffness (2 items); and Physical Function (17 items). Each item is rated on an 11-point (0 to 10) NRS. The WOMAC physical function subscale score was 0 (normal) to 170 (least physical function). A negative change from baseline indicates improvement.
Change From Baseline in WOMAC Pain Scores of the Index Knee at Week 26	Baseline, Week 26	The WOMAC was developed to assess pain, stiffness, and physical function in subjects with hip and/or knee osteoarthritis. The WOMAC consists of 24 items divided into 3 subscales: Pain (5 items); Stiffness (2 items); and Physical Function (17 items). Each item is rated on an 11-point (0 to 10) numerical rating scale (NRS). The pain sub-score has a range of 0 (no pain) to 50 (maximum pain). A negative change from baseline indicates improvement.
Change From Baseline in WOMAC Pain Scores of the Index Knee at Week 52	Baseline, Week 52	The WOMAC was developed to assess pain, stiffness, and physical function in subjects with hip and/or knee osteoarthritis. The WOMAC consists of 24 items divided into 3 subscales: Pain (5 items); Stiffness (2 items); and Physical Function (17 items). Each item is rated on an 11-point (0 to 10) numerical rating scale (NRS). The pain sub-score has a range of 0 (no pain) to 50 (maximum pain). A negative change from baseline indicates improvement.
Change From Baseline in Global Total Bone Marrow Lesion (BML) Score of the Index Knee Magnetic Resonance Imaging (MRI) at Week 26	Baseline, Week 26	BMLs in 15 regions were measured with MRI, and graded as 0 (normal), 1 (mild; \< 25% of region), 2 (moderate; 25% - 50% of region), or 3 (severe; \> 50% of region). The global total BML score was the sum of the 15 component scores, and ranged from 0 (normal) to 45 (severe).
Change From Baseline in Global Total BML Score of the Index Knee MRI at Week 52	Baseline, Week 52	BMLs in 15 regions were measured with MRI, and graded as 0 (normal), 1 (mild; \< 25% of region), 2 (moderate; 25% - 50% of region), or 3 (severe; \> 50% of region). The global total BML score was the sum of the 15 component scores, and ranged from 0 (normal) to 45 (severe).
Change From Baseline in Index Knee Intermittent and Constant Osteoarthritis Pain (ICOAP) Scores at Week 16	Baseline, Week 16	The ICOAP is a multidimensional osteoarthritis-specific measure designed to comprehensively evaluate the pain experience in patients with hip or knee osteoarthritis. The ICOAP includes 11 items (5 constant pain items; 6 intermittent pain items). Each item is rated on a 0 to 4 point scale with a 7-day recall period. The raw maximum intermittent pain score ranges from 0 to 24, transformed to a reported scale of 0 (no pain) to 100 (worst pain). The raw maximum constant pain score ranges from 0 to 20, transformed to a reported scale of 0 (no pain) to 100 (worst pain).
Change From Baseline in Index Knee ICOAP Scores at Week 26	Baseline, Week 26	The ICOAP is a multidimensional osteoarthritis-specific measure designed to comprehensively evaluate the pain experience in patients with hip or knee osteoarthritis. The ICOAP includes 11 items (5 constant pain items; 6 intermittent pain items). Each item is rated on a 0 to 4 point scale with a 7-day recall period. The raw maximum intermittent pain score ranges from 0 to 24, transformed to a reported scale of 0 (no pain) to 100 (worst pain). The raw maximum constant pain score ranges from 0 to 20, transformed to a reported scale of 0 (no pain) to 100 (worst pain).
Change From Baseline in Index Knee ICOAP Scores at Week 52	Baseline, Week 52	The ICOAP is a multidimensional osteoarthritis-specific measure designed to comprehensively evaluate the pain experience in patients with hip or knee osteoarthritis. The ICOAP includes 11 items (5 constant pain items; 6 intermittent pain items). Each item is rated on a 0 to 4 point scale with a 7-day recall period. The raw maximum intermittent pain score ranges from 0 to 24, transformed to a reported scale of 0 (no pain) to 100 (worst pain). The raw maximum constant pain score ranges from 0 to 20, transformed to a reported scale of 0 (no pain) to 100 (worst pain).
Change From Baseline In Index Knee Pain Intensity at Week 16	Baseline, Week 16	The index knee pain intensity was assessed in 3 different ways using an 11 -point NRS (0 to 10 points representing 'no pain' to 'worst possible pain'). Subjects were asked to enter: 1) average pain intensity during the past week (7-day recall period); 2) the worst pain during activity over the past 24 hours; 3) pain intensity before and after a 40 meter walk (performance pain, before and after). The 40 meter fast paced walk test is a test of short distance walking activity, walking speed over short distances and changing direction during walking. Individuals taking the test should walk as quickly but as safely as possible, without running, along a walkway and then turn around, and repeat again for a total distance of 40 m (132 feet). The total time taken to walk the 40 meters is recorded.
Change From Baseline In Index Knee Pain Intensity at Week 26	Baseline, Week 26	The index knee pain intensity was assessed in 3 different ways using an 11 -point NRS (0 to 10 points representing 'no pain' to 'worst possible pain'). Subjects were asked to enter: 1) average pain intensity during the past week (7-day recall period); 2) the worst pain during activity over the past 24 hours; 3) pain intensity before and after a 40 meter walk (performance pain, before and after). The 40 meter fast paced walk test is a test of short distance walking activity, walking speed over short distances and changing direction during walking. Individuals taking the test should walk as quickly but as safely as possible, without running, along a walkway and then turn around, and repeat again for a total distance of 40 m (132 feet). The total time taken to walk the 40 meters is recorded.
Change From Baseline In Index Knee Pain Intensity at Week 52	Baseline, Week 52	The index knee pain intensity was assessed in 3 different ways using an 11 -point NRS (0 to 10 points representing 'no pain' to 'worst possible pain'). Subjects were asked to enter: 1) average pain intensity during the past week (7-day recall period); 2) the worst pain during activity over the past 24 hours; 3) pain intensity before and after a 40 meter walk (performance pain, before and after). The 40 meter fast paced walk test is a test of short distance walking activity, walking speed over short distances and changing direction during walking. Individuals taking the test should walk as quickly but as safely as possible, without running, along a walkway and then turn around, and repeat again for a total distance of 40 m (132 feet). The total time taken to walk the 40 meters is recorded.
Change From Baseline in Patient Global Assessment (PGA) of Arthritis of the Index Knee at Week 16	Baseline, Week 16	The PGA is a single item for evaluating overall osteoarthritis disease activity. PGA is assessed using an 11-point NRS of 0 to 10 points (representing best to worst disease status, respectively), with a 7-day recall period.
Change From Baseline in PGA of Arthritis of the Index Knee at Week 26	Baseline, Week 26	The PGA is a single item for evaluating overall osteoarthritis disease activity. PGA is assessed using an 11-point NRS of 0 to 10 points (representing best to worst disease status, respectively), with a 7-day recall period.
Change From Baseline in PGA of Arthritis of the Index Knee at Week 52	Baseline, Week 52	The PGA is a single item for evaluating overall osteoarthritis disease activity. PGA is assessed using an 11-point NRS of 0 to 10 points (representing best to worst disease status, respectively), with a 7-day recall period.
Change From Baseline in Cartilage Volume of the Index Knee at Week 26	Baseline, Week 26	Cartilage volume of the global knee, the medial central condyle + plateau, and the medial condyle + plateau was measured using MRI.
Change From Baseline in Cartilage Volume of the Index Knee at Week 52	Baseline, Week 52	Cartilage volume of the global knee, the medial central condyle + plateau, and the medial condyle + plateau was measured using MRI.
Change From Baseline in Cartilage Thickness of the Index Knee at Week 26	Baseline, Week 26	Cartilage thickness of the global knee, the medial central condyle + plateau, and the medial condyle + plateau was measured using MRI.
Change From Baseline in Cartilage Thickness of the Index Knee at Week 52	Baseline, Week 52	Cartilage thickness of the global knee, the medial central condyle + plateau, and the medial condyle + plateau was measured using MRI.
Outcome Measures in Rheumatology Clinical Trials/Osteoarthritis Research Society International (OMERACT/OARSI) Response Rate at Week 16	Week 16	Percentage of participants classified as OMERACT-OARSI responders at Week 16. A subject was considered an OMERACT-OARSI responder if any of the following 3 criteria were met: 1. WOMAC Pain (in 0 - 100 scale) improvement ≥ 50% and absolute reduction ≥ 20 as compared to the baseline; or 2. WOMAC Function (in normalized 0 - 100 scale) improvement ≥ 50% and absolute reduction ≥ 20 as compared to the baseline; or 3. At least 2 of the following 3 are met: WOMAC Pain improvement ≥ 20% and absolute reduction (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline; WOMAC Function improvement ≥ 20% and absolute reduction (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline; PGA improvement ≥ 20% and absolute change (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline. Response rate 95% confidence interval based on normal approximation.
Outcome Measures in Rheumatology Clinical Trials/Osteoarthritis Research Society International (OMERACT/OARSI) Response Rate at Week 26	Week 26	Percentage of participants classified as OMERACT-OARSI responders at Week 26. A subject was considered an OMERACT-OARSI responder if any of the following 3 criteria were met: 1. WOMAC Pain (in 0 - 100 scale) improvement ≥ 50% and absolute reduction ≥ 20 as compared to the baseline; or 2. WOMAC Function (in normalized 0 - 100 scale) improvement ≥ 50% and absolute reduction ≥ 20 as compared to the baseline; or 3. At least 2 of the following 3 are met: WOMAC Pain improvement ≥ 20% and absolute reduction (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline; WOMAC Function improvement ≥ 20% and absolute reduction (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline; PGA improvement ≥ 20% and absolute change (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline. Response rate 95% confidence interval based on normal approximation.
Outcome Measures in Rheumatology Clinical Trials/Osteoarthritis Research Society International (OMERACT/OARSI) Response Rate at Week 52	Week 52	Percentage of participants classified as OMERACT-OARSI responders at Week 52. A subject was considered an OMERACT-OARSI responder if any of the following 3 criteria were met: 1. WOMAC Pain (in 0 - 100 scale) improvement ≥ 50% and absolute reduction ≥ 20 as compared to the baseline; or 2. WOMAC Function (in normalized 0 - 100 scale) improvement ≥ 50% and absolute reduction ≥ 20 as compared to the baseline; or 3. At least 2 of the following 3 are met: WOMAC Pain improvement ≥ 20% and absolute reduction (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline; WOMAC Function improvement ≥ 20% and absolute reduction (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline; PGA improvement ≥ 20% and absolute change (in normalized 0 - 100 scale) ≥ 10 as compared to the baseline. Response rate 95% confidence interval based on normal approximation.