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Safety, Efficacy and Duration of Effect of RT002, a Botulinum Toxin Type A for Injection, to Treat Glabellar Lines: The Phase 2 BELMONT Study Authors:

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Presentation on theme: "Safety, Efficacy and Duration of Effect of RT002, a Botulinum Toxin Type A for Injection, to Treat Glabellar Lines: The Phase 2 BELMONT Study Authors:"— Presentation transcript:

1 Safety, Efficacy and Duration of Effect of RT002, a Botulinum Toxin Type A for Injection, to Treat Glabellar Lines: The Phase 2 BELMONT Study Authors: Jean D. Carruthers, MD, University of British Columbia, Vancouver, BC, Canada Arthur Swift, MD, The Westmount Institute of Plastic Surgery, Montreal, QC, Canada Nowell Solish, MD, University of Toronto, Toronto, ON, Canada Vince Bertucci, MD, University of Toronto, Toronto, ON, Canada Alastair Carruthers, MD, University of British Columbia, Vancouver, BC, Canada

2 DISCLOSURES Consultants and Researchers with : ALLERGAN ALPHAEON
MERZ REVANCE ZELTIQ

3 BELMONT Study Design Multi-center, double-blind, active and placebo-controlled trial
Protocol Title: A Phase 2, Randomized, Double-Blind, Dose Ranging, Active and Placebo Controlled, Multi-Center Study to Evaluate the Safety and Efficacy and Duration of RT002, a Botulinum Toxin Type A for Injection, to Treat Glabellar Lines Key Features: Phase 2, DaxibotulinumtoxinA for Injection (RT002) Dose Ranging, Active OnabotulinumtoxinA (BOTOX® Cosmetic) Comparator and Placebo Controlled Objectives: To determine the safety and efficacy of a single treatment of DaxibotulinumtoxinA for Injection (RT002) at three dosage levels for the treatment of glabellar lines versus OnabotulinumtoxinA DaxibotulinumtoxinA: 20U, 40U, 60U OnabotulinumtoxinA: 20U Placebo To assess the duration of effect of a single treatment of DaxibotulinumtoxinA at three dosage levels versus OnabotulinumtoxinA *BOTOX® is a registered trademarks of Allergan, Inc.

4 Facial Wrinkle Severity
Study Population & Scales Subjects with moderate to severe glabellar lines At entry, subjects required to have moderate or severe glabellar lines (GL) as assessed by the Investigator and subject Investigator Global Assessment-Facial Wrinkle Severity (IGA-FWS) Subject’s assessment of Patient Facial Wrinkle Severity (PFWS) IGA-FWS and PFWS also key efficacy endpoints Global Aesthetic Improvement Scale (GAIS) for Investigator and Subject also used as efficacy endpoints IGA-FWS Rating Score Facial Wrinkle Severity None 1 Mild 2 Moderate 3 Severe Photo guide exhibiting the grades of wrinkle severity used for Investigator training and reference PFWS Rating Score Wrinkle Severity Description None No wrinkles 1 Mild Very shallow wrinkles 2 Moderate Moderate wrinkles 3 Severe Deep wrinkles Investigator and Subject GAIS Rating Score Wrinkle Improvement -3 Very Much Worse -2 Much Worse -1 Worse No Change 1 Improved 2 Much Improved 3 Very Much Improved

5 BELMONT Study Assessments
Efficacy evaluations versus baseline Every 4 weeks for up to 36 weeks using Investigator Global Assessment-Facial Wrinkle Severity (IGA-FWS) All subjects were followed for at least 24 weeks Primary Efficacy Assessments ≥ 1-point improvement IGA-FWS Duration of response Risk-to-benefit ratio Secondary Efficacy Assessments Investigator (IGA-FWS) Subject Global Aesthetic Improvement Scale (GAIS) Patient Facial Wrinkle Scale (PFWS) 5

6 Demographics Placebo (N=54) Daxibot* 20U (N=54) Daxibot* 40U (N=53)
Onabot** U (N=54) Age (years) 49.1 (32 to 64) 49.0 (30 to 64) 49.9 (30 to 63) 47.5 (30 to 64) 50.0 (36 to 63) Male 9 (16.7%) 5 ( 9.3%) 7 (13.2%) 11 (20.8%) 6 (11.1%) Female 45 (83.3%) 49 (90.7%) 46 (86.8%) 42 (79.2%) 48 (88.9%) Race: White 46 (85.2%) 47 (87.0%) 50 (94.3%) 48 (90.6%) IGA-FWS: moderate 34 (63.0%) 35 (66.0%) 30 (56.6%) 31 (57.4%) IGA-FWS: severe 20 (37.0%) 18 (34.0%) 23 (43.4%) 23 (42.6%) PFWS: moderate 36 (66.7%) 33 (62.3%) 37 (69.8%) 29 (53.7%) PFWS: severe 18 (33.3%) 20 (37.7%) 16 (30.2%) 25 (46.3%) *Daxibot = DaxibotulinumtoxinA, RT002 **Onabot = OnabotulinumtoxinA, BOTOX® Table 14.1.1; Table 

7 Subject Disposition Per Protocol Population
77 subjects excluded from Per Protocol population 0 subjects violated inclusion/exclusion criteria 2 subjects received incorrect dose/treatment 14 subjects used a prohibited medication 5* subjects did not attend at the primary endpoint, Week 24 visit 57 subjects attended the Week 24 visit off schedule (+/- 5 days) Subjects excluded from PP Similar across treatment groups (12, 14, 10, 10, 11) Not unusual for long term studies * Subjects may have more than one reason for exclusion

8 Summary of Safety All five groups exhibited an excellent overall safety profile in interim data No serious adverse events Adverse events were predominantly localized, transient and mild in severity and typically injection related (erythema and pain) Most common adverse events by subject DaxibotulinumtoxinA dosed at 20U and 40U exhibited NO EYELID PTOSIS OnabotulinumtoxinA had 1.9% ptosis (N=1) DaxibotulinumtoxinA at 60U had 7.5% ptosis (N=4) Placebo N=54 Onabot Daxibot 20U N=53 Daxibot 40U Daxibot 60U Headache 3 10 6 4 Erythema 5 8

9 100% Response Rates For All DaxibotulinumtoxinA Doses
Week 4 Investigator Efficacy Analyses (PP) Placebo N=35 Onabot N=34 Daxibot 20U N=39 Daxibot 40U N=41 Daxibot 60U N=42 ≥ 1 pt 3% 95% 100% ≥ 2 pt 0% 76% 74% 85% 95%* None or Mild 93% 97% 98% * Statistically significant vs. OnabotulinumtoxinA. Study not powered for statistical significance at Week 4 9

10 Primary Efficacy Analyses (Week 24)
Placebo (N=35) Daxibot 20U (N=34) Daxibot 40U (N=39) Daxibot 60U (N=41) Onabot 20 U (N=42) > 1 Point Improvement vs Baseline IGA-FWS N 35 34 39 41 42 Yes 1 (2.9%) 6 (17.6%) 14 (35.9%) 12 (29.3%) 8 (19.0%) No 34 (97.1%) 28 (82.4%) 25 (64.1%) 29 (70.7%) 34 (81.0%) p-value vs Placebo 0.048 <.001 0.003 0.030 p-value vs onabotulinumtoxinA 0.854 0.089 0.328 Duration of Response based on > 1 Point Improvement vs Baseline IGA-FWS (Kaplan-Meier) Median (weeks) 0.0 20.0 23.6 20.9 18.8 95% Confidence Interval N/A (17.0,24.0) (19.6,24.7) (20.0,24.1) (15.9,20.0) 0.430 0.020 0.148 Risk to Benefit Ratio Number of Treatment-Related Adverse Events 8 15 11 22 21 Sum of No. of Response Weeks 16 707 903 923 785 Ratio 0.514 0.022 0.012 0.025 0.027 Table 

11 Carruthers Study: Responder Rate at Maximum Frown By Trained Observer
The peak responder rate occurred between 2 and 4 weeks and ranged from 85% in the 10 U group to 100% in the 40 U group. At Month 3, the responder rate was still near 40% in the 30 and 40 U groups but had fallen to 5% in the 10 U group. At month 4, 25% of patients in the 30 and 40 U groups were still rated as responders. The differences seen among the 4 treatment groups were statistically significant at months 1, 2, and 3 (p < .0294). There was a significant linear trend at months 1, 2, 3, and 4 reflecting a linear dose-dependent response (p < .0212). Carruthers A, Carruthers J, Said S., Division of Dermatology, University of British Columbia, Vancouver, B.C., Canada. Double-Blind, Randomized, Parallel Group, Dose-Ranging Study of Botulinum Toxin Type A in the Treatment of Glabellar Lines, 2001

12 Carruthers Study: Responder Rate at Maximum Frown By Trained Observer
BELMONT 67% Daxibot 40U BELMONT 53% Daxibot 20U BELMONT 32% Onabot 20U The peak responder rate occurred between 2 and 4 weeks and ranged from 85% in the 10 U group to 100% in the 40 U group. At Month 3, the responder rate was still near 40% in the 30 and 40 U groups but had fallen to 5% in the 10 U group. At month 4, 25% of patients in the 30 and 40 U groups were still rated as responders. The differences seen among the 4 treatment groups were statistically significant at months 1, 2, and 3 (p < .0294). There was a significant linear trend at months 1, 2, 3, and 4 reflecting a linear dose-dependent response (p < .0212). Carruthers A, Carruthers J, Said S., Division of Dermatology, University of British Columbia, Vancouver, B.C., Canada. Double-Blind, Randomized, Parallel Group, Dose-Ranging Study of Botulinum Toxin Type A in the Treatment of Glabellar Lines, 2001

13 DaxibotulinumtoxinA 40U Outperforms OnabotulinumtoxinA At All Time Points
DaxibotulinumtoxinA 40U showed higher response rate for None or Mild wrinkles by Investigator Assessment at all time points Dose Group Week 4 Week 8 Week 12 Week 16 Week 20 Week 24 Daxibot 40U 97% 97%* 85% 67%* 46%* 31%* Onabot 20U 93% 83% 69% 32% 22% 12% Not Just a Dose Effect… Dose Group Week 4 Week 8 Week 12 Week 16 Week 20 Week 24 Daxibot 20U 97% 88% 82% 53%* 35% 12% Onabot 20U 93% 83% 69% 32% 22% * Statistically significant (p<.05) vs OnabotulinumtoxinA

14 Duration of response separates from onabot in every daxibot dose group
Kaplan-Meier Curve: Duration of Response (None or Mild) for IGA-FWS Assessment at Maximum Frown (Per-Protocol Population)

15 Duration of response separates from onabot
Kaplan-Meier Curve: Duration of Response (None or Mild) for IGA-FWS Assessment at Maximum Frown (Per-Protocol Population) daxibotuinumtoxinA 20U group vs. onabotulinumtoxinA 20U AND Placebo

16 Duration of response separates from onabot
Kaplan-Meier Curve: Duration of Response (None or Mild) for IGA-FWS Assessment at Maximum Frown (Per-Protocol Population) daxibotulinumtoxinA 40U group vs. onabotulinumtoxinA 20U AND Placebo

17 DaxibotulinumtoxinA 40 U
Example 2-Point Improvement by IGA-FWS & PFWS at Week 4; 1-Point Sustained Duration of Effect DaxibotulinumtoxinA 40 U MAXIMUM FROWN Pre-treatment Week 4 Week 24 Baseline Scores: IGA-FWS: 3 PFWS: 3 Week 4 Scores: IGA-FWS: 0 PFWS: 0 Week 24 Scores: IGA-FWS: 2 PFWS: 2 Photo ID RT

18 DaxibotulinumtoxinA 40 U
Example 2-Point Improvement by IGA-FWS & PFWS at Week 4; 2-Point Sustained Duration of Effect DaxibotulinumtoxinA 40 U MAXIMUM FROWN Pre-treatment Week 4 Week 24 Baseline Scores: IGA-FWS: 2 PFWS: 2 Week 4 Scores: IGA-FWS: 0 PFWS: 0 Week 24 Scores: IGA-FWS: 0 PFWS: 0 Photo ID RT

19 Conclusions and Next Steps
DaxibotulinumtoxinA achieves statistically significant 6-month duration of effect with higher responder rates compared to OnabotulinumtoxinA DaxibotulinumtoxinA achieves 100% investigator and at or near 100% patient response in all doses at the 28-day primary efficacy assessment DaxibotulinumtoxinA 40U appears well-tolerated with no Ptosis. Efficacy was statistically superior at the majority of time points compared to OnabotulinumtoxinA DaxibotulinumtoxinA 40U results indicate 31% of subjects maintain none or mild wrinkles compared to OnabotulinumtoxinA at 12% at 6 months BELMONT results support selection of the DaxibotulinumtoxinA 40U dose to move forward into Phase 3 Revance plans FDA End of Phase 2 Meeting and Phase 3 Initiation in 2H 2016


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