CLINICAL PHARMACOLOGY
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 Â (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.
Distribution
The steady state volume of distribution (Vss) was
estimated as 4.7 to 8 L in the population pharmacokinetic analysis for patients
with Crohn's disease, patients with rheumatoid arthritis, and adult patients
with plaque psoriasis.
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.
Special Populations
Population pharmacokinetic analysis was conducted on data
from 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. The
presence of anticertolizumab antibodies was associated with a ≥3 to
4-fold increase in clearance.
Age
Pharmacokinetics of certolizumab pegol was not different
in elderly compared to young adults.
Gender
Pharmacokinetics of certolizumab pegol was similar in
male and female subjects.
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.
Race
A specific clinical study showed no difference in
pharmacokinetics between Caucasian and Japanese subjects.
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 (CDAI1) 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) 200 mg + MTX q 2 weeks
N=393 |
CIMZIA(a) 200 mg + MTX -Placebo + MTX (95% CI)(d) |
Placebo
N=109 |
CIMZIA(b) 400 mg q 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 q 2 weeks
N=393 |
Placebo
N=109 |
CIMZIA(b) 400 mg q 4 weeks 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 |
1.75 |
1.63 |
1.75 |
1.00 |
1.55 (0.65) |
1.62 (0.68) |
1.43 (0.63) |
1.04 (0.74) |
(HAQ)(e) 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 *
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).
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 *
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 2-point 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 12 presents the efficacy results of PS-1, PS-2, and
PS-3 at Week 16.
Table 12: 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).
REFERENCES
1. Best WR, Becktel JM, Singleton JW, Kern F: Development
of a Crohn's Disease Activity Index, National Cooperative Crohn's Disease
Study. Gastroenterology 1976; 70(3): 439-444