Pharmacotherapeutic group: Ophthalmologicals, other ophthalmologicals, ATC code: S01XA18
Mechanism of action and pharmacodynamic effects
Ciclosporin is a calcineurin inhibitor with immunosuppressant and anti-inflammatory activity. It inhibits the activation of transcription factors required for T-cell activation and inflammatory cytokine production, including interleukin 2 (IL-2) and T-cell growth factor (TCGF). It may also upregulate the release of anti-inflammatory cytokines.
In Dry Eye Disease (DED), which involves an inflammatory mechanism, ciclosporin absorbed into T-lymphocytes in the ocular surface inactivates calcineurin phosphatase, thus blocking the release of pro-inflammatory cytokines, such as IL-2.
Clinical efficacy
Clinical trials
The efficacy and safety of Cequa was established in two separate, randomised, double-masked, vehicle-controlled, clinical trials involving a total of 1,200 adult patients with moderate to severe DED (SANDE score ≥40) and symptoms present for 6 months or longer. Of these, a total of 524 patients were treated with Cequa, 525 with vehicle. In the efficacy studies, patients were treated 2x daily for 12 weeks. Patients were also required to have bilateral DED supported by the presence of lissamine green conjunctival staining score of ≥ 3 to ≤ 9 out of 12 (NEI scale).
The results of these studies were consistent and are summarised in Table 1.
Table 1 Summary of Key Efficacy Results
| Parameter | | OTX-101-2014-0011 | OTX-101-2016-001 |
| | | OTX-101 | Vehicle | P-value | OTX-101 | Vehicle | p-Value |
| N2 (Enrolled/completed) | | 152/140 | 152/144 | | 372/347 | 373/361 | |
| Schirmer's Test increase ≥10mm (%)3 |
| Overall | | 16.8% | 8.6% | 0.0021 | 16.6% | 9.2% | 0.0001 |
| B/L <5mm B/L 5 - 9mm B/L ≥ 10mm | | 20.8 18.8 13.9 | 8.9 10.8 6.8 | | 20.4 17.3 14.8 | 10.2 10.1 8.5 | |
| Mean Schirmer's Test (mm) |
| Mean (SD) | B/L | 12.3 (8.67) | 12.2 (8.25) | | 11.89 (7.77) | 12.09 (7.73) | |
| LS Mean (SE) | Δ B/L | 3.5 (0.61) | 0.4 (0.60) | 0.0003 | 2.80 (0.28) | 0.99 (0.27) | <0.0001 |
| LGS Total (Max score = 12) |
| Mean (SD) | B/L | 5.40 (1.75) | 5.52 (1.665) | | 5.42 (1.714) | 5.52 (1.767) | |
| LS mean (SE) | Δ B/L | -1.57 (0.133) | -0.83 (0.131) | <0.0001 | -1.54 (0.082) | -1.15 | 0.0007 |
| LGS Temporal zone (Max Score = 4) |
| Mean (SD) | B/L | 0.92 (0.612) | 0.90 (0.627) | | 0.92 (0.639) | 1.00 (0.666) | |
| LS mean (SE) | Δ B/L | -0.34 (0.042) | -0.11 (0.041) | 0.0001 | -0.33 (0.027) | -0.21 (0.027) | 0.0030 |
| LGS Complete Clearing (Temporal zone) 3 |
| | | 55.4% | 37.2% | ≤0.0001 | 52.9% | 45.6% | 0.0049 |
| CFS score Total (Max Score = 20) |
| Mean (SD) | B/L | 4.40 (2.847) | 4.42 (2.636) | | 4.06 (2.374) | 4.30 (2.650) | |
| LS mean (SE) | Δ B/L | -1.33 (0.149) | -0.43 (0.147) | <0.0001 | -1.47 (0.075) | -1.11 (0.074) | 0.0007 |
| CFS Score Central (Max Score =4) |
| Mean (SD) | B/L | 0.76 (0.708) | 0.75 (0.704) | | 0.60 (0.597) | 0.69 (0.705) | |
| LS mean (SE) | Δ B/L | -0.28 (0.039) | -0.09 (0.039) | 0.0005 | -0.30 (0.019) | -0.24 (0.019) | 0.0159 |
| CFS Complete Clearing central (%)3 |
| | | 50.7% | 43.8% | 0.0777 | 65.0% | 56.9% | 0.0022 |
B/L = Baseline; Δ B/L = Change from Baseline; LGS = Lissamine Green Staining (Conjunctiva), CFS = Corneal Fluoresceine Staining
1 Reanalysed to facilitate comparison with OTX-101-2016-001.
2 N= Intent to Treat population
3 n = number of subjects with only one eye + 2 times number of subjects with both eyes responding. Denominator is 2 times the number of subjects.
OTX-101-2014-001, was a dose finding study with 2 co-primary efficacy endpoints of mean change from baseline at Day 84 for total conjunctival staining score in the designated study eye and Global SANDE symptom score. In OTX-101-2016-001, the primary efficacy endpoint was the proportion of patients with an increase of ≥10mm from baseline in Schirmer's test score at Day 84 based on data for both eyes. Other key secondary and additional efficacy variables included mean change from baseline in Schirmer's test score, mean change from baseline in total and temporal lissamine green conjunctival staining score, clearing of temporal lissamine green staining, mean change from baseline in total and central corneal fluorescein staining score, and clearing of central corneal staining.
The results from both clinical studies were consistent (See Table 1). Cequa was superior to its vehicle with respect to increased tear production: a higher proportion of subjects treated with Cequa responded with an increase in Schirmer's test of ≥10mm compared to vehicle treated subjects, and the increase in LS Mean Schirmer's results was higher in the Cequa treated group. Cequa treated patients showed superior improvement in corneal damage using fluorescein staining (decrease in LS Mean Total CFS score, Clearing of CFS in the central region of the cornea and reduction of LS Mean CFS Score for central region) compared to vehicle treated subjects. Conjunctival damage (with lissamine green staining) in the Cequa treated group was reduced more significantly than in the vehicle treated group as demonstrated by comparison of LS Mean LGS scores for overall and for the temporal region of the conjunctiva, and of clearing of LGS in the temporal region. The effect noted for ocular surface improvement (both corneal and conjunctival staining) was noted within 28 days and was maintained for the duration of the studies.
Both Cequa and its Vehicle improved symptoms (SANDE score) by approximately 30% with no statistical difference between them.