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Pharmacology: Pharmacodynamics: Clinical studies: Treatment of severe keratitis in dry eye disease: The efficacy and safety of Ciclosporin (Ikervis) were evaluated in two randomised, double-masked, vehicle-controlled clinical studies in adult patients with dry eye disease (keratoconjunctivitis sicca) who met the International Dry Eye Workshop (DEWS) criteria.
In the 12 month, double-masked, vehicle controlled, pivotal clinical trial (SANSIKA study), 246 Dry Eye Disease (DED) patients with severe keratitis (defined as a corneal fluorescein staining (CFS) score of 4 on the modified Oxford scale) were randomised to one drop of Ciclosporin (Ikervis) or vehicle daily at bedtime for 6 months. Patients randomised to the vehicle group were switched to Ciclosporin (Ikervis) after 6 months. The primary endpoint was the proportion of patients achieving by Month 6 at least a two-grade improvement in keratitis (CFS) and a 30% improvement in symptoms, measured with the Ocular Surface Disease Index (OSDI). The proportion of responders in the Ciclosporin (Ikervis) group was 28.6%, compared to 23.1% in the vehicle group. The difference was not statistically significant (p=0.326).
The severity of keratitis, assessed using CFS, improved significantly from baseline at Month 6 with Ciclosporin (Ikervis) compared to vehicle (mean change from baseline was -1.764 with Ciclosporin (Ikervis) vs. -1.418 with vehicle, p=0.037). The proportion of Ciclosporin (Ikervis)-treated patients with a 3-grade improvement in CFS score at Month 6 (from 4 to 1) was 28.8%, compared to 9.6% of vehicle-treated subjects, but this was a post-hoc analysis, which limits the robustness of this outcome. The beneficial effect on keratitis was maintained in the open phase of the study, from Month 6 and up to Month 12.
The mean change from baseline in the 100-point OSDI score was ‑13.6 with Ciclosporin (Ikervis) and ‑14.1 with vehicle at Month 6 (p=0.858). In addition, no improvement was observed for Ciclosporin (Ikervis) compared to vehicle at Month 6 for other secondary endpoints, including ocular discomfort score, Schirmer test, use of concomitant artificial tears, investigator's global evaluation of efficacy, tear break-up time, lissamine green staining, quality of life score, and tear osmolarity.
A reduction in the ocular surface inflammation assessed with Human Leukocyte Antigen-DR (HLA-DR) expression (an exploratory endpoint), was observed at Month 6 in favour of Ciclosporin (Ikervis) (p=0.021).
In the 6 month, double-masked, vehicle controlled, supportive clinical trial (SICCANOVE study), 492 DED patients with moderate to severe keratitis (defined as a CFS score of 2 to 4) were also randomised to Ciclosporin (Ikervis) or vehicle daily at bedtime for 6 months. The co-primary endpoints were the change in CFS score, and the change in global score of ocular discomfort unrelated to study medication instillation, both measured at Month 6. A small but statistically significant difference in CFS improvement was observed between the treatment groups at Month 6 in favour of Ciclosporin (Ikervis) (mean change from baseline in CFS -1.05 with Ciclosporin (Ikervis) and -0.82 with vehicle, p=0.009).
The mean change from baseline in ocular discomfort score (assessed using a Visual Analogic Scale) was -12.82 with Ciclosporin (Ikervis) and -11.21 with vehicle (p=0.808).
In both studies, no significant improvement of symptoms was observed for Ciclosporin (Ikervis) compared to vehicle after 6 months of treatment, whether using a visual analogue scale or the OSDI.
In both studies one third of the patients in average had Sjögren's syndrome; as for the overall population, a statistically significant improvement in CFS in favour of Ciclosporin (Ikervis) was observed in this subgroup of patients.
At completion of the SANSIKA study (12 month study), patients were asked to enter the Post SANSIKA study. This study was an open-label, non-randomized, one-arm, 24-month study extension of the Sansika Study. In Post SANSIKA study patients alternatively received Ciclosporin (Ikervis) treatment or no treatment depending on CFS score (patients received Ciclosporin (Ikervis) when there was a worsening of keratitis).
This study was designed to monitor the long-term efficacy and relapse rates in patients who have previously received Ciclosporin (Ikervis).
The primary objective of the study was to assess the duration of the improvement following Ciclosporin (Ikervis) treatment discontinuation once the patient was improved with respect to the baseline of the SANSIKA study (i.e. at least 2 grade improvement on the modified Oxford scale).
67 patients were enrolled (37.9% of the 177 patients having ended SANSIKA). After the 24-month period, 61.3% of 62 patients included in the primary efficacy population did not experience a relapse based on CFS scores. Percentage of patients who experienced a severe keratitis recurrence was 35% and 48% in patients treated 12 months and 6 months with Ciclosporin (Ikervis) respectively in the SANSIKA study.
Based on the first quartile (the median could not be estimated due to the small number of relapses), time to relapse (back to CFS grade 4) was ≤224 days and ≤175 days in patients previously treated 12 months and 6 months with Ciclosporin (Ikervis), respectively. Patients spent more time on CFS grade 2 (Median 12.7 weeks/year) and grade 1 (Median 6.6 weeks/year) than CFS grade 3 (Median 2.4 weeks/year), CFS grades 4 and 5 (Median time 0 week/year).
Assessment of DED symptoms by VAS showed a worsening of patient's discomfort from the time treatment was first stopped to the time it was restarted except pain which remained relatively low and stable. The median global VAS score increased from the time treatment was first stopped (23.3%) to the time treatment was restarted (45.1%).
No significant changes have been observed in the other secondary endpoints (TBUT, lissamine green staining and Schirmer test, NEI-VFQ and EQ-5D) over the course of the extension study.
Paediatric population: The European Medicines Agency has waived the obligation to submit the results of studies with Ciclosporin (Ikervis) in all subsets of the paediatric population for dry eye disease (see Dosage & Administration for information on paediatric use).
Treatment of severe vernal keratoconjunctivitis (VKC): In a 12 month double-masked, vehicle controlled, pivotal clinical trial (VEKTIS study), 169 patients with severe VKC and severe keratitis (grade 4 or 5 on the modified Oxford scale) were randomised to 4 drops (high dose) or 2 drops (low dose) of ciclosporin 1 mg/mL eye drops emulsion and 2 drops or 4 drops of vehicle for the first 4 months (Period 1). Patients randomised to the vehicle group were switched to ciclosporin 1 mg/mL eye drops emulsion (four times or twice daily) from Month 4 to Month 12 (Period 2).
168 patients [127 children (75.6%) and 41 adolescents (24.4%)] were included in the efficacy analyses. Mean age was 9.2 years (SD: 3.3, age range: 4-17 years). There were more male [n=132 (78.6%)] than female patients [n=36 (21.4%)].
The primary efficacy endpoint which was the average penalties adjusted change of the Corneal Fluorescein Staining (CFS) score from baseline and over Period 1, considered all patients (n=168). Efficacy was assessed every month during the 4 month treatment period and compared with baseline using a composite criterion based on keratitis assessed by the modified Oxford scale, the need for rescue medicinal product (use of topical steroids) and the occurrence of corneal ulceration.
The difference in the Least Square (LS) mean vs. vehicle was 0.76 (95% CI: 0.26, 1.27) for the high dose group and 0.67 (95% CI: 0.16, 1.18) for the low dose group. Both differences were statistically significant with p=0.007 for the high dose and p=0.010 for the low dose group.
Clinical relevance of the primary efficacy endpoint was however difficult to address. In that context, responder rate's results were considered as more reliable endpoint. A responder was defined as a patient 1) with a mean CFS score over the 4 months of treatment ≤ 50% of baseline, 2) who did not withdraw from the study for a reason possibly due to treatment, 3) with no experience of corneal ulceration and 4) no use of rescue medicinal product in the last 4 months of treatment. There was a significantly higher number of CFS responders in both active groups as compared to vehicle (p=0.005 for the high dose group, and p=0.010 for the low dose group) with 55.4%, 50.0% and 27.6% of responders in the high dose, low dose and vehicle groups respectively. The excess rate with respect to vehicle was 27.8% for the high dose regimen and 22.4% for the low dose one.
Rescue medicinal product (topical steroids) was used more often in the vehicle than in the high dose regimen: 32.1% in the high dose group and 31.5% in the low dose group received at least one course of rescue medicinal product while they were 53.4% in the vehicle group.
All four symptoms (photophobia, tearing, itching and mucous discharge) improved over time and the difference from baseline at Month 4 for each symptom largely exceeded 10 mm.
For the average of VKC symptoms, the difference in the LS mean vs. vehicle in the high dose group was statistically significant at all time points compared to vehicle: -19.4 mm (p<0.05).
Patient quality of life (Quick questionnaire) improved significantly better in the high dose group compared to vehicle. The improvement was clinically relevant as illustrated by the effect size over 4 months (symptoms domain: 0.67 and daily activities domain: 0.44).
In Period 2, analyses demonstrated stability of improvements achieved during Period 1 for both doses regimen.
