Clinical Pharmacology for Cimzia
Mechanism Of Action
Certolizumab pegol binds to human TNFα with a KD of 90pM. TNFα is a key pro-inflammatory cytokine with a central role in inflammatory processes. Certolizumab pegol selectively neutralizes TNFα (IC90 of 4 ng/mL for inhibition of human TNFα in the in vitro L929 murine fibrosarcoma cytotoxicity assay) but does not neutralize lymphotoxin α (TNFβ). Certolizumab pegol cross-reacts poorly with TNF from rodents and rabbits, therefore in vivo efficacy was evaluated using animal models in which human TNFα was the physiologically active molecule.
Certolizumab pegol was shown to neutralize membrane-associated and soluble human TNFα in a dose-dependent manner. Incubation of monocytes with certolizumab pegol resulted in a dose-dependent inhibition of LPS-induced TNFα and IL-1β production in human monocytes.
Certolizumab pegol does not contain a fragment crystallizable (Fc) region, which is normally present in a complete antibody, and therefore does not fix complement or cause antibody-dependent cell-mediated cytotoxicity in vitro. It does not induce apoptosis in vitro in human peripheral blood-derived monocytes or lymphocytes, nor does certolizumab pegol induce neutrophil degranulation.
A tissue reactivity study was carried out ex vivo to evaluate potential cross-reactivity of certolizumab pegol with cryosections of normal human tissues. Certolizumab pegol showed no reactivity with a designated standard panel of normal human tissues.
Pharmacodynamics
Biological activities ascribed to TNFα include the upregulation of cellular adhesion molecules and chemokines, upregulation of major histocompatibility complex (MHC) class I and class II molecules, and direct leukocyte activation. TNFα stimulates the production of downstream inflammatory mediators, including interleukin-1, prostaglandins, platelet activating factor, and nitric oxide. Elevated levels of TNFα have been implicated in the pathology of Crohn’s disease and rheumatoid arthritis. Certolizumab pegol binds to TNFα, inhibiting its role as a key mediator of inflammation. TNFα is strongly expressed in the bowel wall in areas involved by Crohn’s disease and fecal concentrations of TNFα in patients with Crohn’s disease have been shown to reflect clinical severity of the disease. After treatment with certolizumab pegol, patients with Crohn’s disease demonstrated a decrease in the levels of C-reactive protein (CRP). Increased TNFα levels are found in the synovial fluid of rheumatoid arthritis patients and play an important role in the joint destruction that is a hallmark of this disease.
Pharmacokinetics
Absorption
A total of 126 healthy subjects received doses of up to 800 mg certolizumab pegol subcutaneously (sc) and up to 10 mg/kg intravenously (IV) in four pharmacokinetic studies. Data from these studies demonstrate that single intravenous and subcutaneous doses of certolizumab pegol have predictable dose-related plasma concentrations with a linear relationship between the dose administered and the maximum plasma concentration (Cmax), and the Area Under the certolizumab pegol plasma concentration versus time Curve (AUC). A mean Cmax of approximately 43 to 49 mcg/mL occurred at Week 5 during the initial loading dose period using the recommended dose regimen for the treatment of patients with rheumatoid arthritis (400 mg sc at Weeks 0, 2 and 4 followed by 200 mg every other week).
Certolizumab pegol plasma concentrations were broadly dose-proportional and pharmacokinetics observed in patients with rheumatoid arthritis, Crohn’s disease, and plaque psoriasis were consistent with those seen in healthy subjects.
Following subcutaneous administration, peak plasma concentrations of certolizumab pegol were attained between 54 and 171 hours post-injection. Certolizumab pegol has bioavailability (F) of approximately 80% (ranging from 76% to 88%) following subcutaneous administration compared to intravenous administration.
In pediatric patients with JIA with active polyarthritis, mean peak plasma concentrations, measured 1 week following loading dose and maintenance dose were 58.8 μg/ml and 41.8 μg/ml, respectively. Similar peak plasma concentrations were observed across the different body weight groups (10 kg to less than 20 kg, 20 kg to less than 40 kg, and greater than or equal to 40 kg).
Distribution
The steady state volume of distribution (Vss) was estimated as 4.7 to 8 L in the population pharmacokinetic analysis for adult patients with Crohn’s disease, patients with rheumatoid arthritis, and adult patients with plaque psoriasis.
The volume of distribution in pediatric patients with JIA with active polyarthritis was dependent on body size.
Metabolism
The metabolism of certolizumab pegol has not been studied in human subjects. Data from animals indicate that once cleaved from the Fab' fragment the PEG moiety is mainly excreted in urine without further metabolism.
Elimination
PEGylation, the covalent attachment of PEG polymers to peptides, delays the metabolism and elimination of these entities from the circulation by a variety of mechanisms, including decreased renal clearance, proteolysis, and immunogenicity. Accordingly, certolizumab pegol is an antibody Fab’ fragment conjugated with PEG in order to extend the terminal plasma elimination half-life (t½) of the Fab’. The terminal elimination phase half-life (t½) was approximately 14 days for all doses tested. The clearance following IV administration to healthy subjects ranged from 9.21 mL/h to 14.38 mL/h. The clearance following sc dosing was estimated 17 mL/h in the Crohn’s disease population PK analysis with an inter-subject variability of 38% (CV) and an inter-occasion variability of 16%. Similarly, the clearance following sc dosing was estimated as 21.0 mL/h in the RA population PK analysis, with an inter-subject variability of 30.8% (%CV) and inter-occasion variability 22.0%. The clearance following subcutaneous dosing in patients with plaque psoriasis was 14 mL/h with an inter-subject variability of 22.2% (CV). The route of elimination of certolizumab pegol has not been studied in human subjects. Studies in animals indicate that the major route of elimination of the PEG component is via urinary excretion.
In pediatric patients with JIA with active polyarthritis, clearance was body weight dependent, and t½ was similar to adult indications.
Specific Populations
Population pharmacokinetic analysis was conducted on data from adult patients with rheumatoid arthritis and patients with Crohn’s disease, to evaluate the effect of age, race, gender, methotrexate use, concomitant medication, creatinine clearance and presence of anti-certolizumab antibodies on pharmacokinetics of certolizumab pegol. A population pharmacokinetic analysis was also conducted on data from patients with plaque psoriasis to evaluate the effect of age, gender, body weight, and presence of anti-certolizumab pegol antibodies. Only bodyweight and presence of anti-certolizumab antibodies significantly affected certolizumab pegol pharmacokinetics. Pharmacokinetic exposure was inversely related to body weight but pharmacodynamic exposure-response analysis showed that no additional therapeutic benefit would be expected from a weight-adjusted dose regimen. When assessed using the previous ELISA method, the presence of anti-certolizumab antibodies was associated with a ≥ 3 to 4 fold increase in clearance.
Geriatric Patients
Pharmacokinetics of certolizumab pegol was not different in elderly compared to young adults (>18 years old).
Pediatric Patients
In the JIA with active polyarthritis study (NCT01550003), the mean trough plasma concentrations at Week 12 (steady-state) were 31.8 μg/mL, 27.9 μg/mL, and 36.8 μg/mL for patients weighing 10 to <20 kg, 20 to <40 kg, and ≥40 kg, respectively. Population pharmacokinetic analyses showed that plasma concentrations in pediatric patients with JIA with active polyarthritis are in the same range as observed in adult patients with RA receiving a 200 mg Q2W maintenance dose.
Similar to the adult indications, body weight and anti-certolizumab antibodies titers affected certolizumab pegol pharmacokinetics, where higher body weights and presence of anti-certolizumab antibodies was associated with lower exposures. There was no observed impact from the use of concomitant methotrexate on certolizumab pegol plasma concentrations.
Racial Or Ethnic Groups
A specific clinical study showed no difference in pharmacokinetics between Caucasian and Japanese subjects.
Male And Female Patients
Pharmacokinetics of certolizumab pegol was similar in male and female subjects in both adult and pediatric patients.
Patients With Renal Impairment
Specific clinical studies have not been performed to assess the effect of renal impairment on the pharmacokinetics of CIMZIA. The pharmacokinetics of the PEG (polyethylene glycol) fraction of certolizumab pegol is expected to be dependent on renal function but has not been assessed in renal impairment. There are insufficient data to provide a dosing recommendation in moderate and severe renal impairment.
Drug Interaction Studies
Methotrexate pharmacokinetics is not altered by concomitant administration with CIMZIA in patients with rheumatoid arthritis. The effect of methotrexate on CIMZIA pharmacokinetics was not studied. However, methotrexate-treated patients have lower incidence of antibodies to CIMZIA. Thus, therapeutic plasma levels are more likely to be sustained when CIMZIA is administered with methotrexate in patients with rheumatoid arthritis.
Formal drug-drug interaction studies have not been conducted with CIMZIA upon concomitant administration with corticosteroids, nonsteroidal anti-inflammatory drugs, analgesics or immunosuppressants.
Clinical Studies
Crohn’s Disease
The efficacy and safety of CIMZIA were assessed in two double-blind, randomized, placebo-controlled studies in patients aged 18 years and older with moderately to severely active Crohn’s disease, as defined by a Crohn’s Disease Activity Index (CDAI) of 220 to 450 points, inclusive. CIMZIA was administered subcutaneously at a dose of 400 mg in both studies. Stable concomitant medications for Crohn’s disease were permitted.
Study CD1
Study CD1 was a randomized placebo-controlled study in 662 patients with active Crohn’s disease. CIMZIA or placebo was administered at Weeks 0, 2, and 4 and then every four weeks to Week 24. Assessments were done at Weeks 6 and 26. Clinical response was defined as at least a 100-point reduction in CDAI score compared to baseline, and clinical remission was defined as an absolute CDAI score of 150 points or lower.
The results for Study CD1 are provided in Table 3. At Week 6, the proportion of clinical responders was statistically significantly greater for CIMZIA-treated patients compared to controls. The difference in clinical remission rates was not statistically significant at Week 6. The difference in the proportion of patients who were in clinical response at both Weeks 6 and 26 was also statistically significant, demonstrating maintenance of clinical response.
Table 3: Study CD1 – Clinical Response and Remission, Overall Study Population
| Timepoint |
% Response or Remission (95% CI) |
Placebo
(N = 328) |
CIMZIA 400 mg
(N = 331) |
| Week 6 |
| Clinical Response# |
27% (22%, 32%) |
35% (30%, 40%)* |
| Clinical Remission# |
17% (13%, 22%) |
22% (17%, 26%) |
| Week 26 |
| Clinical Response |
27% (22%, 31%) |
37% (32%, 42%)* |
| Clinical Remission |
18% (14%, 22%) |
29% (25%, 34%)* |
| Both Weeks 6 & 26 |
| Clinical Response |
16% (12%, 20%) |
23% (18%, 28%)* |
| Clinical Remission |
10% (7%, 13%) |
14% (11%, 18%) |
* p-value < 0.05 logistic regression test
# Clinical response is defined as decrease in CDAI of at least 100 points, and clinical remission is defined as CDAI ≤ 150 points |
Study CD2
Study CD2 was a randomized treatment-withdrawal study in patients with active Crohn’s disease. All patients who entered the study were dosed initially with CIMZIA 400 mg at Weeks 0, 2, and 4 and then assessed for clinical response at Week 6 (as defined by at least a 100-point reduction in CDAI score). At Week 6, a group of 428 clinical responders was randomized to receive either CIMZIA 400 mg or placebo, every four weeks starting at Week 8, as maintenance therapy through Week 24. Non-responders at Week 6 were withdrawn from the study. Final evaluation was based on the CDAI score at Week 26. Patients who withdrew or who received rescue therapy were considered not to be in clinical response. Three randomized responders received no study injections, and were excluded from the ITT analysis.
The results for clinical response and remission are shown in Table 4. At Week 26, a statistically significantly greater proportion of Week 6 responders were in clinical response and in clinical remission in the CIMZIA-treated group compared to the group treated with placebo.
Table 4: Study CD2 - Clinical Response and Clinical Remission
|
% Response or Remission (95% CI) |
CIMZIA 400 mg x3 + Placebo
N = 210 |
CIMZIA 400 mg
N = 215 |
| Week 26 |
| Clinical Response# |
36% (30%, 43%) |
63% (56%, 69%)* |
| Clinical Remission# |
29% (22%, 35%) |
48% (41%, 55%)* |
* p < 0.05
# Clinical response is defined as decrease in CDAI of at least 100 points, and clinical remission is defined as CDAI ≤ 150 points |
Baseline use of immunosuppressants or corticosteroids had no impact on the clinical response to CIMZIA.
Rheumatoid Arthritis
The efficacy and safety of CIMZIA were assessed in four randomized, placebo-controlled, double-blind studies (RA-I, RA-II, RA-III, and RA-IV) in patients ≥ 18 years of age with moderately to severely active rheumatoid arthritis diagnosed according to the American College of Rheumatology (ACR) criteria. Patients had ≥ 9 swollen and tender joints and had active RA for at least 6 months prior to baseline. CIMZIA was administered subcutaneously in combination with MTX at stable doses of at least 10 mg weekly in Studies RA-I, RA-II, and RA-III. CIMZIA was administered as monotherapy in Study RA-IV.
Study RA-I and Study RA-II evaluated patients who had received MTX for at least 6 months prior to study medication, but had an incomplete response to MTX alone. Patients were treated with a loading dose of 400 mg at Weeks 0, 2 and 4 (for both treatment arms) or placebo followed by either 200 mg or 400 mg of CIMZIA or placebo every other week, in combination with MTX for 52 weeks in Study RA-I and for 24 weeks in Study RA-II. Patients were evaluated for signs and symptoms and structural damage using the ACR20 response at Week 24 (RA-I and RA-II) and modified Total Sharp Score (mTSS) at Week 52 (RA-I). The open-label extension follow-up study enrolled 846 patients who received 400 mg of CIMZIA every other week.
Study RA-III evaluated 247 patients who had active disease despite receiving MTX for at least 6 months prior to study enrollment. Patients received 400 mg of CIMZIA every four weeks for 24 weeks without a prior loading dose. Patients were evaluated for signs and symptoms of RA using the ACR20 at Week 24.
Study RA-IV (monotherapy) evaluated 220 patients who had failed at least one DMARD use prior to receiving CIMZIA. Patients were treated with CIMZIA 400 mg or placebo every 4 weeks for 24 weeks. Patients were evaluated for signs and symptoms of active RA using the ACR20 at Week 24.
Clinical Response
The percent of CIMZIA-treated patients achieving ACR20, 50, and 70 responses in Studies RA-I and RA-IV are shown in Table 5. CIMZIA-treated patients had higher ACR20, 50 and 70 response rates at 6 months compared to placebo-treated patients. The results in study RA-II (619 patients) were similar to the results in RA-I at Week 24. The results in study RA-III (247 patients) were similar to those seen in study RA-IV. Over the one-year Study RA-I, 13% of CIMZIA-treated patients achieved a major clinical response, defined as achieving an ACR70 response over a continuous 6-month period, compared to 1% of placebo-treated patients.
Table 5: ACR Responses in Studies RA-I, and RA-IV (Percent of Patients)
| Response |
Study RA-I Methotrexate Combination (24 and 52 weeks) |
Study RA-IV Monotherapy (24 weeks) |
Placebo + MTX
N=199 |
CIMZIA(a) 200mg + MTXq 2 weeks
N=393 |
CIMZIA(a) 200 mg + MTX - Placebo + MTX (95% CI)(d) |
Placebo
N=109 |
CIMZIA(b) 400 mgq 4 weeks
N=111 |
CIMZIA(b) 400 mg - Placebo (95% CI)(d) |
| ACR20 |
| Week 24 |
14% |
59% |
45%
(38%, 52%) |
9% |
46% |
36%
(25%, 47%) |
| Week 52 |
13% |
53% |
40%
(33%, 47%) |
N/A |
N/A |
|
| ACR50 |
| Week 24 |
8% |
37% |
30%
(24%, 36%) |
4% |
23% |
19%
(10%, 28%) |
| Week 52 |
8% |
38% |
30%
(24%, 37%) |
N/A |
N/A |
|
| ACR70 |
| Week 24 |
3% |
21% |
18%
(14%, 23%) |
0% |
6% |
6%
(1%, 10%) |
| Week 52 |
4% |
21% |
18%
(13%, 22%) |
N/A |
N/A |
|
| Major |
| Clinical Response (c) |
1% |
13% |
12%
(8%, 15%) |
|
|
|
(a) CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(b) CIMZIA administered every 4 weeks not preceded by a loading dose regimen
(c) Major clinical response is defined as achieving ACR70 response over a continuous 6-month period
(d) 95% Confidence Intervals constructed using the large sample approximation to the Normal Distribution |
Table 6: Components of ACR Response in Studies RA-I and RA-IV
| Parameter+ |
Study RA-I |
Study RA-IV |
Placebo +MTX
N==199 |
CIMZIA(a) 200 mg + MTX q2 weeks
N=393 |
Placebo
N=109 |
CIMZIA(b) 400 mg q 4weeks Monotherapy
N=111 |
| Baseline |
Week 24 |
Baseline |
Week 24 |
Baseline |
Week 24 |
Baseline |
Week 24 |
| Number of tender joints (0-68) |
28 |
27 |
29 |
9 |
28 (12.5) |
24 (15.4) |
30 (13.7) |
16 (15.8) |
| Number of swollen joints (0-66) |
20 |
19 |
20 |
4 |
20 (9.3) |
16 (12.5) |
21 (10.1) |
12 (11.2) |
| Physician global assessment(c) |
66 |
56 |
65 |
25 |
4 (0.6) |
3 (1.0) |
4 (0.7) |
3 (1.1) |
| Patient global assessment(c) |
67 |
60 |
64 |
32 |
3 (0.8) |
3 (1.0) |
3 (0.8) |
3 (1.0) |
| Pain(c)(d) |
65 |
60 |
65 |
32 |
55 (20.8) |
60 (26.7) |
58 (21.9) |
39 (29.6) |
| Disability index (HAQ)(e) |
1.75 |
1.63 |
1.75 |
1.00 |
1.55 (0.65) |
1.62 (0.68) |
1.43 (0.63) |
1.04 (0.74) |
| CRP (mg/L) |
16.0 |
14.0 |
16.0 |
4.0 |
11.3 |
13.5 |
11.6 |
6.4 |
(a) CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(b) CIMZIA administered every 4 weeks not preceded by a loading dose regimen
(c) Study RA-I - Visual Analog Scale: 0 = best, 100 = worst. Study RA-IV - Five Point Scale: 1 = best, 5 = worst
(d) Patient Assessment of Arthritis Pain. Visual Analog Scale: 0 = best, 100 = worst
(e) Health Assessment Questionnaire Disability Index; 0 = best, 3 = worst, measures the patient’s ability to perform the following: dress/groom, arise, eat, walk, reach, grip, maintain hygiene, and maintain daily activity All values are last observation carried forward.
+For Study RA-I, median is presented. For Study RA-IV, mean (SD) is presented except for CRP which presents geometric mean |
The percent of patients achieving ACR20 responses by visit for Study RA-I is shown in Figure 1. Among patients receiving CIMZIA, clinical responses were seen in some patients within one to two weeks after initiation of therapy.
Figure 1 : Study RA-I ACR20 Response Over 52 Weeks*
*The same patients may not have responded at each time point
Radiographic Response
In Study RA-I, inhibition of progression of structural damage was assessed radiographically and expressed as the change in modified Total Sharp Score (mTSS) and its components, the Erosion Score (ES) and Joint Space Narrowing (JSN) score, at Week 52, compared to baseline. CIMZIA inhibited the progression of structural damage compared to placebo plus MTX after 12 months of treatment as shown in Table 7. In the placebo group, 52% of patients experienced no radiographic progression (mTSS ≤0.0) at Week 52 compared to 69% in the CIMZIA 200 mg every other week treatment group. Study RA-II showed similar results at Week 24.
Table 7: Radiographic Changes at 6 and 12 months in Study RA-I
|
Placebo + MTX
N=199 Mean (SD) |
CIMZIA 200 mg + MTX
N=393 Mean (SD) |
CIMZIA 200 mg +MTX -Placebo + MTX Mean Difference |
| mTSS |
| Baseline |
40 (45) |
38 (49) |
-- |
| Week 24 |
1.3 (3.8) |
0.2 (3.2) |
-1.1 |
| Week 52 |
2.8 (7.8) |
0.4 (5.7) |
-2.4 |
| Erosion Score |
| Baseline |
14 (21) |
15 (24) |
-- |
| Week 24 |
0.7 (2.1) |
0.0 (1.5) |
-0.7 |
| Week 52 |
1.5 (4.3) |
0.1 (2.5) |
-1.4 |
| JSN Score |
| Baseline |
25 (27) |
24 (28) |
-- |
| Week 24 |
0.7 (2.4) |
0.2 (2.5) |
-0.5 |
| Week 52 |
1.4 (5.0) |
0.4 (4.2) |
-1.0 |
An ANCOVA was fitted to the ranked change from baseline for each measure with region and treatment as factors and rank baseline as a covariate.
Physical Function Response
In studies RA-I, RA-II, RA-III, and RA-IV, CIMZIA-treated patients achieved greater improvements from baseline than placebo-treated patients in physical function as assessed by the Health Assessment Questionnaire – Disability Index (HAQ-DI) at Week 24 (RA-II, RA-III and RA-IV) and at Week 52 (RA-I).
Polyarticular Juvenile Idiopathic Arthritis
The efficacy of CIMZIA in pediatric patients with pJIA is based on pharmacokinetic exposure  and extrapolation of the established efficacy of CIMZIA in RA patients.
The efficacy of CIMZIA was also assessed in a multi-center, open-label study NCT01550003 in  193 patients 2 to 17 years of age with JIA with active polyarthritis with an inadequate response or  intolerance to at least 1 DMARD (nonbiologic or biologic). Of those, 105 received the recommended  dose. The patients had the following subtypes of JIA: polyarthritis rheumatoid factor-positive (20.0%),  polyarthritis rheumatoid factor-negative (44.8%), extended oligoarthritis (13.3%), juvenile psoriatic  arthritis (4.8%), and enthesitis-related arthritis (19.0%). Patients could be on stable methotrexate,  glucocorticoids, and/or NSAIDs. Efficacy was assessed as secondary endpoints through Week 24. The  efficacy was generally consistent with responses in patients with RA.
Psoriatic Arthritis
The efficacy and safety of CIMZIA were assessed in a multi-center, randomized, double-blind, placebo controlled trial (PsA001) in 409 patients aged 18 years and older with active psoriatic arthritis despite DMARD therapy. Patients in this study had ≥ 3 swollen and tender joints and adult-onset PsA of at least 6 months’ duration as defined by the Classification Criteria for Psoriatic Arthritis (CASPAR) criteria, and increased acute phase reactants. Patients had failed one or more DMARDs. Previous treatment with one anti-TNF biologic therapy was allowed, and 20% of patients had prior anti-TNF biologic exposure. Patients receiving concomitant NSAIDs and conventional DMARDs were 73% and 70 % respectively.
Patients received a loading dose of CIMZIA 400 mg at Weeks 0, 2 and 4 (for both treatment arms) or placebo followed by either CIMZIA 200 mg every other week or CIMZIA 400 mg every 4 weeks or placebo every other week. Patients were evaluated for signs and symptoms and structural damage using the ACR20 response at Week 12 and modified Total Sharp Score (mTSS) at Week 24.
Clinical Response
The percentage of CIMZIA-treated patients achieving ACR20, 50 and 70 responses in study PsA001 are shown in Table 8. ACR20 response rates at weeks 12 and 24 were higher for each CIMZIA dose group relative to placebo (95% confidence intervals for CIMZIA 200 mg minus placebo at weeks 12 and 24 of (23%, 45%) and (30%, 51%), respectively and 95% confidence intervals for CIMZIA 400 mg minus placebo at weeks 12 and 24 of (17%, 39%) and (22%, 44%), respectively). The results of the components of the ACR response criteria are shown in Table 9.
Patients with enthesitis at baseline were evaluated for mean improvement in Leeds Enthesitis Index (LEI). CIMZIA-treated patients receiving either 200 mg every 2 weeks or 400 mg every 4 weeks showed a reduction in enthesitis of 1.8 and 1.7, respectively as compared with a reduction in placebo-treated patients of 0.9 at week 12. Similar results were observed for this endpoint at week 24. Treatment with CIMZIA resulted in improvement in skin manifestations in patients with PsA.
Table 8: ACR Responses in Study PsA001 (Percent of Patients)
| Response(c) |
|
Placebo
N=136 |
CIMZIA(a)200 mg Q2W
N=138 |
CIMZIA(b) 400 mg Q4W
N=135 |
| ACR20 |
| Week 12 |
24% |
58% |
52% |
| Week 24 |
24% |
64% |
56% |
| ACR50 |
| Week 12 |
11% |
36% |
33% |
| Week 24 |
13% |
44% |
40% |
| ACR70 |
| Week 12 |
3% |
25% |
13% |
| Week 24 |
4% |
28% |
24% |
(a) CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(b) CIMZIA administered every 4 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(c) Results are from the randomized set. Non-responder Imputation (NRI) is used for patients who escaped therapy or had missing data. |
Table 9: Components of ACR Response in Study PsA001
| Parameter |
Placebo(c)
N=136 |
CIMZIA(a) 200 mg Q2W
N=138 |
CIMZIA(b) 400 mg Q4W
N=135 |
| Baseline |
Week 12 |
Baseline |
Week 12 |
Baseline |
Week 12 |
| Number of tender joints (0-68)(d) |
20 |
17 |
22 |
11 |
20 |
11 |
| Number of swollen joints (0-66)(d) |
10 |
9 |
11 |
4 |
11 |
5 |
| Physician global assessment(d, e) |
59 |
44 |
57 |
25 |
58 |
29 |
| Patient global assessment(d, e) |
57 |
50 |
60 |
33 |
60 |
40 |
| Pain(d,f) |
60 |
50 |
60 |
33 |
61 |
39 |
| Disability index (HAQ)(d g) |
1 .30 |
1.15 |
1.33 |
0.87 |
1.29 |
0.90 |
| CRP (mg/L) |
18.56 |
14.75 |
15.36 |
5.67 |
13.71 |
6.34 |
(a)CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(b) CIMZIA administered every 4 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(c) Results are from the entire placebo group
(d) Last Observation Carried Forward is used for missing data, early withdrawals or placebo escape
(e) Patient and Physician Global Assessment of Disease Activity, VAS 0=best 100= worst
(f) The Patient Assessment of Arthritis Pain, VAS 0=no pain and 100= most severe pain
(g) The HAQ-DI, 4 point scale 0=without difficulty and 3=unable to do
All values presented represent the mean
Results are from the randomized set (either with imputation or observed case) |
The percent of patients achieving ACR20 responses by visit for PsA001 is shown in Figure 2.
Figure 2: Study PsA001-ACR20 Response Over 24 Weeks*
Randomized Set. Non-responder imputation used for patients with missing data or those who escaped therapy.
*The same patients may not have responded at each time point.
Radiographic Response
In study PsA001, inhibition of progression of structural damage was assessed radiographically and expressed as the change in modified total Sharp score (mTSS) and its components, the Erosion Score (ES) and Joint Space Narrowing score (JSN) at week 24, compared to baseline. The mTSS score was modified for psoriatic arthritis by addition of hand distal interphalangeal (DIP) joints.
Patients treated with CIMZIA 200 mg every other week demonstrated greater reduction in radiographic progression compared with placebo-treated patients at Week 24 as measured by change from baseline in total modified mTSS Score (estimated mean score was 0.18 in the placebo group compared with -0.02 in the CIMZIA 200 mg group; 95% CI for the difference was (-0.38, -0.04)). Patients treated with CIMZIA 400 mg every four weeks did not demonstrate greater inhibition of radiographic progression compared with placebo-treated patients at Week 24.
Physical Function Response
In Study PsA001, CIMZIA-treated patients showed improvement in physical function as assessed by the Health Assessment Questionnaire – Disability Index (HAQ-DI) at Week 24 as compared to placebo (estimated mean change from baseline was 0.19 in the placebo group compared with 0.54 in the CIMZIA 200 mg group; 95% CI for the difference was (-0.47, -0.22) and 0.46 in the CIMZIA 400 mg group; 95% CI for the difference was (-0.39, -0.14)).
Ankylosing Spondylitis
The efficacy and safety of CIMZIA were assessed in one multicenter, randomized, double-blind, placebo-controlled study (AS-1) in 325 patients ≥18 years of age with adult-onset active axial spondyloarthritis for at least 3 months. The majority of patients in the study had active AS.
Patients had active disease as defined by the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) ≥4, and spinal pain ≥4 on a 0 to 10 Numerical Rating Scale (NRS). Patients must have been intolerant to or had an inadequate response to at least one NSAID. Patients were treated with a loading dose of CIMZIA 400 mg at Weeks 0, 2 and 4 (for both treatment arms) or placebo followed by either 200 mg of CIMZIA every 2 weeks or 400 mg of CIMZIA every 4 weeks or placebo. Concomitant NSAIDs were received by 91% of the AS patients. The primary efficacy variable was the proportion of patients achieving an ASAS20 response at Week 12.
Clinical Response
In study AS-1, at Week 12, a greater proportion of AS patients treated with CIMZIA 200 mg every 2 weeks or 400 mg every 4 weeks achieved ASAS 20 response compared to AS patients treated with placebo (Table 10). Responses were similar in patients receiving CIMZIA 200 mg every 2 weeks and CIMZIA 400 mg every 4 weeks. The results of the components of the ASAS response criteria and other measures of disease activity are shown in Table 11.
Table 10: ASAS Responses in AS patients at Weeks 12 and 24 in study AS-1
| Parameters |
Placebo
N=57 |
CIMZIA(a) 200 mg every 2 weeks
N=65 |
CIMZIA(b) 400 mg every 4 weeks
N=56 |
| ASAS20 |
| Week 12 |
37% |
57% |
64% |
| Week 24 |
33% |
68% |
70% |
| ASAS40 |
| Week 12 |
19% |
40% |
50% |
| Week 24 |
16% |
48% |
59% |
(a)CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(b) CIMZIA administered every 4 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
All percents reflect the proportion of patients who responded in the full analysis set |
Table 11: Components of the ASAS response criteria and other measures of disease activity in AS patients at baseline and Week 12 in study AS-1
|
Placebo
N=57 |
CIMZIA(a) 200 mg every 2 weeks
N=65 |
CIMZIA(b) 400 mg every 4 weeks
N=56 |
| Baseline |
Week 12 |
Baseline |
Week 12 |
Baseline |
Week 12 |
| ASAS20 response criteria |
| -Patient Global Assessment (010) |
6.9 |
5.6 |
7.3 |
4.2 |
6.8 |
3.8 |
| -Total spinal pain (0-10) |
7.3 |
5.8 |
7.0 |
4.3 |
6.9 |
4.0 |
| -BASFI (0-10)(c) |
6.0 |
5.2 |
5.6 |
3.8 |
5.7 |
3.8 |
| -Inflammation (0-10) |
6.7 |
5.5 |
6.7 |
3.8 |
6.4 |
3.4 |
| BASDAI (0-10)(d) |
6.4 |
5.4 |
6.5 |
4.0 |
6.2 |
3.7 |
| BASMI (e) |
4.8 |
4.4 |
4.2 |
3.6 |
4.3 |
3.9 |
(a)CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(b)CIMZIA administered every 4 weeks preceded by a loading dose of 400 mg at Weeks 0, 2 and 4
(c)BASFI is Bath Ankylosing Spondylitis Functional Index
(d)BASDAI is Bath Ankylosing Spondylitis Disease Activity Index
(e)BASMI is Bath Ankylosing Spondylitis Metrology Index
All values presented represent the mean in the full analysis set |
The percent of AS patients achieving ASAS20 responses by visit for Study AS001 is shown in Figure 3. Among patients receiving CIMZIA, clinical responses were seen in some AS patients within one to two weeks after initiation of therapy.
Figure 3: Study AS-1: ASAS20 response over 24 weeks in AS patients *
*The same patients may not have responded at each time point.
Non-radiographic Axial Spondyloarthritis
The efficacy and safety of CIMZIA were assessed in a multicenter, randomized, double-blind, placebo-controlled study (nr-axSpA-1) (NCT02552212) in 317 subjects ≥18 years of age with adult-onset active axial spondyloarthritis for at least 12 months. Patients must have had objective signs of inflammation indicated by C-reactive protein (CRP) levels above the upper limit of normal and/or sacroiliitis on magnetic resonance imaging (MRI), indicative of inflammatory disease [positive CRP (> ULN) and/or positive MRI], but without definitive radiographic evidence of structural damage on sacroiliac joints.
Patients had active disease as defined by the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) ≥4, and spinal pain ≥4 on a 0 to 10 Numerical Rating Scale (NRS). Patients must have been intolerant to or had an inadequate response to at least two NSAIDs. Patients were treated with a loading dose of CIMZIA 400 mg at Weeks 0, 2 and 4 or placebo followed by 200 mg of CIMZIA every 2 weeks or placebo. Utilization and dose adjustment of concomitant medications (including NSAIDs, DMARDs, corticosteroids, opioids) were permitted at any time. Patients were allowed to transition to use of open-label CIMZIA at any time at the discretion of the investigator. However, no patients transitioned before Week 12. The primary endpoint was the proportion of patients achieving an Ankylosing Spondylitis Disease Activity Score-Major Improvement (ASDAS-MI) response at Week 52. The ASDAS is a composite weighted scoring system that assesses disease activity, including patient-reported outcomes and CRP levels. A response in ASDAS-Major Improvement (MI) is indicated by a change from baseline of ≥2.0 in the ASDAS and/or reaching the lowest possible ASDAS value.
Clinical Response
In study nr-axSpA-1, at Week 52, a greater proportion of nr-axSpA patients treated with CIMZIA had ASDAS-MI response compared to patients treated with placebo. At both Weeks 12 and 52, ASAS40 responses were greater for patients treated with CIMZIA compared to patients treated with placebo (Table 12). The components of the ASDAS-MI and ASAS response criteria are shown in Table 13.
Table 12: Clinical Responses in nr-axSpA patients at Weeks 12 and 52 in study nr-axSpA-1
| Parameters |
Placebo
N=158 |
CIMZIA(a) 200 mg every 2 weeks
N=159 |
CIMZIA 200 mg versus Placebo Odds ratio (95% CI) |
| ASDAS-MI |
| Week 52 |
7% |
47% |
15.2 (7.3 , 31.6) |
| ASAS-40 |
| Week 12 |
11% |
48% |
7.4 (4.1, 13.4) |
| Week 52 |
16% |
57% |
7.4 (4.3, 12.6) |
| (a)CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2, and 4 All percents reflect the proportion of patients who were responders and remained in the study and on randomized treatment in the full analysis set. Patients who initiated open-label CIMZIA, or discontinued randomized treatment and remained in the study, or were missing Week 52 visit data were imputed as non-responders. |
Table 13: Components of the ASDAS-MI and ASAS response criteria and other measures of disease activity in nr-axSpA patients at baseline, and at Week 12 in study nr-axSpA-1
|
Placebo N=158 |
CIMZIA (a) 200 mg every 2 weeks
N=159 |
| Baseline (SD) |
Week 12 (SD) |
Baseline (SD) |
Week 12 (SD) |
| Total Spinal Pain (0-10) |
6.9 (1.8) |
6.0 (2.3) |
7.0 (1.9) |
3.9 (2.6) |
| Patient Global Assessment of Disease Activity (0-10) |
6.7 (2.0) |
5.9 (2.4) |
6.8 (1.9) |
3.8 (2.6) |
| C-Reactive Protein (mg/L) |
15.8 (17.7) |
13.2 (17.2) |
15.8 (17.8) |
6.7 (15.1) |
| BASDAI (0-10)(b) |
6.8 (1.3) |
5.7 (2.1) |
6.9 (1.4) |
3.9 (2.2) |
| - Back Pain |
7.4 (1.3) |
6.2 (2.1) |
7.4 (1.4) |
4.1 (2.5) |
| - Peripheral pain and swelling (0-10) |
6.2 (2.2) |
5.3 (2.5) |
6.3 (2.3) |
3.7 (2.4) |
| - Inflammation(c) |
6.7 (1.8) |
5.5 (2.4) |
6.9 (1.8) |
3.6 (2.4) |
| BASFI (0-10)(d) |
5.4 (2.2) |
4.9 (2.4) |
5.4 (2.1) |
3.2 (2.3) |
| BASMI (e) |
2.8 (1.4) |
2.7 (1.4) |
3.0 (1.3) |
2.6 (1.4) |
(a)CIMZIA administered every 2 weeks preceded by a loading dose of 400 mg at Weeks 0, 2, and 4
(b)BASDAI is Bath Ankylosing Spondylitis Disease Activity Index
(c)The average of BASDAI question 5 and 6 concerning morning stiffness intensity and duration.
(d)BASFI is Bath Ankylosing Spondylitis Functional Index
(e)BASMI is Bath Ankylosing Spondylitis Metrology Index
Mean and standard deviation in parenthesis were presented based on full analysis set. |
The percentage of nr-axSpA patients achieving ASDAS-MI response by visit for study nr-axSpA-1 is shown in Figure 4.
Figure 4: Study nr-axSpA-1: ASDAS-MI response over 12 weeks *
*The same patients may not have responded at each time point.
In study AS-1, at Week 12, patients with nr-axSpA treated with CIMZIA 200 mg every 2 weeks and CIMZIA 400 mg every 4 weeks had an ASAS 20 response of 42% and 47%, respectively, compared to 20% of patients treated with placebo. The ASAS 40 response in patients treated with CIMZIA 200 mg every 2 weeks and 400 mg every 4 weeks was 30% and 37%, respectively, compared to 11% of patients treated with placebo at Week 12 (see Section 14.4).
Other Health Related Outcomes
In study nr-axSpA-1, at Week 12, patients treated with CIMZIA achieved significantly greater improvement from baseline in the Ankylosing Spondylitis Quality of Life Questionnaire (ASQoL) score compared to patients treated with placebo.
Plaque Psoriasis
Three multicenter, randomized, double-blind studies (Study PS-1 [NCT02326298], Study PS-2 [NCT02326272], and Study PS-3 [NCT02346240]) enrolled subjects 18 years of age or older with moderate-to-severe plaque psoriasis who were eligible for systemic therapy or phototherapy. Subjects had a Physician Global Assessment (PGA) of ≥ 3 (“moderate”) on a 5-category scale of overall disease severity, a Psoriasis Area and Severity Index (PASI) score ≥ 12, and body surface area (BSA) involvement of ≥ 10%.
Studies PS-1 (234 subjects) and PS-2 (227 subjects) randomized subjects to placebo, CIMZIA 200 mg every other week (following a loading dose of CIMZIA 400 mg at Weeks 0, 2, and 4), or CIMZIA 400 mg every other week. Studies PS-1 and PS-2 assessed the co-primary endpoints of the proportion of patients who achieved a PASI 75 and PGA of “clear” or “almost clear” with at least a 2Âpoint improvement at Week 16. Other evaluated outcomes were PASI 90 at Week 16 and maintenance of efficacy to Week 48.
Study PS-3 randomized 559 subjects to receive placebo, CIMZIA 200 mg every other week (following a loading dose of CIMZIA 400 mg at Weeks 0, 2, and 4), CIMZIA 400 mg every other week up to Week 16, or a biologic comparator (up to Week 12). Study PS-3 assessed the proportion of patients who achieved a PASI 75 at Week 12 as the primary endpoint. Other evaluated outcomes were PGA of “clear” or “almost clear” at Week 16, PASI 75 at Week 16, PASI 90 at Week 16, and maintenance of efficacy to Week 48.
Of the 850 subjects randomized to receive placebo or CIMZIA in these placebo-controlled studies, 29% of patients were naïve to prior systemic therapy for the treatment of psoriasis, 47% had received prior phototherapy or chemophototherapy, and 30% had received prior biologic therapy for the treatment of psoriasis. Of the 850 subjects, 14% had received at least one TNF alpha agent and 16% had received an anti-IL agent. Eighteen percent of subjects reported a history of psoriatic arthritis at baseline.
Across all studies and treatment groups, the mean PASI score at baseline was 20 and ranged from 12 to 69. The baseline PGA score ranged from moderate (70%) to severe (30%). Mean baseline BSA was 25% and ranged from 10% to 96%. Subjects were predominantly men (64%) and White (94%), with a mean age of 46 years.
Clinical Response
Table 15 presents the efficacy results of PS-1, PS-2, and PS-3 at Week 16.
Table 15: Efficacy Results at Week 16 in Adults with Plaque Psoriasis in PS-1, PS-2, and PS-3 [MI(a)]
|
Study PS-1 |
Study PS-2 |
Study PS-3(e) |
Placebo
(N=51) |
CIMZIA 200mg(c) Q2W
(N=95) |
CIMZIA 400mg Q2W
(N=88) |
Placebo
(N=49) |
CIMZIA 200mg Q2W
(N=91) |
CIMZIA 400mg Q2W
(N=87) |
Placebo
(N=57) |
CIMZIA 200mg Q2W
(N=165) |
CIMZIA 400mg Q2W
(N=167) |
| PGA of 0 or 1(b, d) |
4% |
45% |
55% |
3% |
61% |
65% |
4% |
52% |
62% |
| PASI 75(b) |
7% |
65% |
75% |
13% |
81% |
82% |
4% |
69% |
75% |
| PASI 90 |
0% |
36% |
44% |
5% |
50% |
52% |
0% |
40% |
49% |
(a) Missing data was imputed using multiple imputation based on the MCMC method.
(b) The co-primary efficacy endpoints at Week 16 in PS-1 and PS-2.
(c) Subjects received 400 mg of CIMZIA at Weeks 0, 2, and 4, followed by 200 mg every other week.
(d) PGA score of 0 (clear) or 1 (almost clear).
(e) The primary endpoint in PS-3 was PASI 75 at Week 12. |
Examination of age, gender, prior use of biologics, and prior use of systemic therapies did not identify difference in response to CIMZIA among these subgroups.
Based on a post-hoc subgroup analysis in subjects with moderate-to-severe psoriasis, stratified by ≤90 kg or >90 kg, subjects with both lower body weight and lower disease severity may achieve an acceptable response with CIMZIA 200 mg.
Maintenance Of Response
In PS-1 and PS-2, among subjects who were PASI 75 responders at Week 16 and received CIMZIA 400 mg every other week, the PASI 75 response rates at Week 48 were 94% and 81%, respectively. In subjects who were PASI 75 responders at Week 16 and received CIMZIA 200 mg every other week, the PASI 75 response rates at Week 48 were 81% and 74%, respectively.
In PS-1 and PS-2, among subjects who were PGA clear or almost clear responders at Week 16 and received CIMZIA 400 mg every other week, the PGA response rates at Week 48 were 79% and 73%, respectively. In subjects who were PGA clear or almost clear responders at Week 16 and received CIMZIA 200 mg every other week, the PGA response rates at Week 48 were 79% and 76%, respectively.
In PS-3 study, subjects who achieved a PASI 75 response at Week 16 were re-randomized to either continue treatment with CIMZIA or be withdrawn from therapy (i.e., receive placebo). At Week 48, 98% of subjects who continued on CIMZIA 400 mg every other week were PASI 75 responders as compared to 36% of subjects who were re-randomized to placebo. Among PASI 75 responders at Week 16 who received CIMZIA 200 mg every other week and were re-randomized to either CIMZIA 200 mg every other week or placebo, there was also a higher percentage of PASI 75 responders at Week 48 in the CIMZIA group as compared to placebo (80% and 46%, respectively).