Phase III Cat-PAD Study

A Double-Blind, Randomised, Placebo-Controlled Multi-Centre Field Study to Assess the Efficacy and Safety of Cat-PAD Peptide Immunotherapy in Cat Allergic Subjects

The purpose of this study is to compare the treatment effect of two treatment regimens of Cat-PAD vs placebo and to evaluates the treatment effect of Cat-PAD on symptoms, rescue medication usage and Quality of Life.

Study Overview

• Status: Completed
• Conditions: Rhinoconjunctivitis
• Intervention / Treatment: Drug: Placebo; Drug: Cat-PAD

• Study Type: Interventional
• Enrollment (Actual): 1408
• Phase: Phase 3

Contacts and Locations

Study Locations

• Belgium
  • Brussels, Belgium
  • Gent, Belgium
  • Leuven, Belgium
• Canada
  • Ontario
    • Burlington, Ontario, Canada
    • Corruna, Ontario, Canada
    • Hamilton, Ontario, Canada
    • Kanata, Ontario, Canada
    • London, Ontario, Canada
    • Newmarket, Ontario, Canada
    • Niagara Falls, Ontario, Canada
    • Oshawa, Ontario, Canada
    • Ottawa, Ontario, Canada
    • Toronto, Ontario, Canada
  • Quebec
    • Montreal, Quebec, Canada
    • Pointe Claire, Quebec, Canada
    • Quebec City, Quebec, Canada
    • Trois Rivieres, Quebec, Canada
• Czechia
  • Brnho, Czechia
  • Caslav, Czechia
  • Jablonec nad Nisou, Czechia
  • Kutna Hora, Czechia
  • Prague, Czechia
  • Rychnov nad Kneznou, Czechia
  • České Budějovice, Czechia
• Germany
  • Berlin, Germany
  • Bonn, Germany
  • Bramsche, Germany
  • Hamburg, Germany
  • Heidelberg, Germany
  • Koln, Germany
  • Monchengladbach, Germany
  • Munster, Germany
  • München, Germany
  • Neuss, Germany
  • Osnabruck, Germany
  • Wesel, Germany
  • Wiesbaden, Germany
  • Wuppertal, Germany
• Hungary
  • Budapest, Hungary
  • Csorna, Hungary
  • Pecs, Hungary
  • Tatabanya, Hungary
• Poland
  • Bydgoszcz, Poland
  • Gdansk, Poland
  • Katowice, Poland
  • Krakow, Poland
  • Lodz, Poland
  • Lublin, Poland
  • Poznan, Poland
  • Rzeszow, Poland
  • Tarnow, Poland
  • Warszawa, Poland
  • Wroclaw, Poland
  • Zabrze, Poland
  • Zawadzkie, Poland
• Russian Federation
  • Barnaul, Russian Federation
  • Moscow, Russian Federation
  • Novosibirsk, Russian Federation
  • Omsk, Russian Federation
  • Saint-Petersburg, Russian Federation
  • Stavropol, Russian Federation
  • Tomsk, Russian Federation
  • Yekaterinburg, Russian Federation
• Slovakia
  • Bardejov, Slovakia
  • Martin, Slovakia
  • Poprad, Slovakia
• United States
  • California
    • Rolling Hills Estates, California, United States
  • Colorado
    • Colorado Springs, Colorado, United States
    • Denver, Colorado, United States
    • Wheat Ridge, Colorado, United States
  • Idaho
    • Eagle, Idaho, United States
    • Meridian, Idaho, United States
  • Illinois
    • Chicago, Illinois, United States
    • Evanston, Illinois, United States
    • Forrest, Illinois, United States
    • Normal, Illinois, United States
  • Iowa
    • Iowa, Iowa, United States
  • Kansas
    • Overland Park, Kansas, United States
  • Maine
    • Bangor, Maine, United States
  • Massachusetts
    • Brockton, Massachusetts, United States
  • Michigan
    • Ypsilanti, Michigan, United States
  • Minnesota
    • Minneapolis, Minnesota, United States
  • Missouri
    • Kansas City, Missouri, United States
    • Saint Louis, Missouri, United States
  • Montana
    • Bozeman, Montana, United States
    • Missoula, Montana, United States
  • Nebraska
    • Bellevue, Nebraska, United States
    • Fremont, Nebraska, United States
    • Omaha, Nebraska, United States
  • New Jersey
    • Ocean Township, New Jersey, United States
  • New Mexico
    • Albuquerque, New Mexico, United States
  • New York
    • Corning, New York, United States
    • Newburgh, New York, United States
  • North Dakota
    • Fargo, North Dakota, United States
    • Minot, North Dakota, United States
  • Ohio
    • Canton, Ohio, United States
    • Cincinnati, Ohio, United States
    • Middleburg Heights, Ohio, United States
    • Sylvania, Ohio, United States
    • Toledo, Ohio, United States
  • Oklahoma
    • Tulsa, Oklahoma, United States
  • Oregon
    • Lake Oswego, Oregon, United States
    • Medford, Oregon, United States
    • Portland, Oregon, United States
  • Pennsylvania
    • Blue Bell, Pennsylvania, United States
    • Pittsburgh, Pennsylvania, United States
  • Tennessee
    • Germantown, Tennessee, United States
    • Nashville, Tennessee, United States
  • Texas
    • Dallas, Texas, United States
    • San Antonio, Texas, United States
  • Utah
    • Draper, Utah, United States
  • Virginia
    • Glen Allen, Virginia, United States
    • South Burlington, Virginia, United States
    • Warrenton, Virginia, United States
  • Washington
    • Spokane, Washington, United States
  • Wisconsin
    • Greenfield, Wisconsin, United States
    • Madison, Wisconsin, United States
    • Milwaukee, Wisconsin, United States

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 12 years to 65 years (Child, Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria

• Male or female, aged 12-65 years.
• Moderate to severe rhinoconjunctivitis on exposure to cats for at least 2 years.
• Subjects may optionally also have GINA Step 1 controlled asthma.
• Positive skin prick test to cat hair.
• Cat dander specific IgE ≥0.35 kU/L.

Exclusion Criteria

• Asthma falling under the GINA definitions "partly controlled" and "uncontrolled" or Steps 2 to 5.
• FEV1 <80% of predicted.
• Clinically significant confounding symptoms of allergy to seasonal allergens during the final evaluation period.
• Skin prick test 5 mm greater than the negative control to perennial allergens or animal dander (other than cat) which cannot be avoided during the study.
• Significant symptoms of another clinically relevant illness that is likely to affect scoring of rhinoconjunctivitis symptoms.
• Clinically relevant abnormalities detected on physical examination.
• History of severe drug allergy, severe angioedema or anaphylactic reaction to food.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Quadruple

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo	Drug: Placebo; 1 dose every 4 weeks
Experimental: Cat-Pad Treatment 1; Cat-PAD Treatment 1	Drug: Cat-PAD; 1 dose every 4 weeks
Experimental: Cat-PAD Treatment 2; Cat-PAD Treatment regimen 2	Drug: Placebo; 1 dose every 4 weeks; Drug: Cat-PAD; 1 dose every 4 weeks

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Mean Combined Score in Cat-PAD Treatment Groups Compared With Placebo	The primary endpoint was the mean Combined Score (CS) measured over a 3 week period (52-54 weeks after randomisation) in the Cat-PAD treatment groups compared with the mean CS in the placebo group. A higher score indicated worse symptoms or greater use of medication and thus a low score indicated a better outcome. CS = Total Rhinoconjunctivitis Symptom Score (TRSS) + Rescue Medication Score (RMS). Eight symptoms are defined in the TRSS, 4 nasal symptoms: runny nose, sneezing; blocked nose, and itchy nose and 4 ocular symptoms: itchy eyes; watery eyes; red eyes and sore eyes. Each symptom was rated in severity on a score of 0-3 (0=absent, 3=severe) and the total was divided by the number of symptoms to provide an average score per symptom of 0-3. RMS was scored from 0 (no allergy rescue medication use per day) to 3 (at least one dose of systemic corticosteroid per day). The RMS score was not additive, and therefore the maximum RMS was 3 and the maximum CS was 6.	52-54 weeks after randomisation

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Mean TRSS	Mean Total Rhinoconjunctivitis Symptom Score (TRSS) in Cat-PAD treatment groups compared with placebo. Eight symptoms are defined in the TRSS, 4 nasal symptoms: runny nose, sneezing; blocked nose, and itchy nose and 4 ocular symptoms: itchy eyes; watery eyes; red eyes, and sore eyes. Each symptom was rated in severity on a score of 0-3 (0. absent; 1. mild, barely noticeable; 2. moderate, annoying/troublesome; 3. severe, very annoying/very troublesome), therefore TRSS could range from 0 to 24. Higher TRSS reflected more severe symptom scores. Symptoms were scored daily for a period of approximately 3 weeks. 52-54 weeks after randomisation.	52-54 weeks after randomisation
Mean Daily TNSS in Cat-PAD Compared With Placebo	TNSS (Total nasal symptom score) was the sum of all the nasal symptom scores (runny nose; sneezing; blocked nose; itchy nose) and could range from 0 to 12. Higher TNSS reflected more severe symptoms. Subjects rated the severity of each symptom over the last 24 hours as follows: 0. absent; 1. mild, barely noticeable; 2. moderate, annoying/troublesome; 3. severe, very annoying/very troublesome. Symptoms were scored daily for a period of approximately 3 weeks. 52-54 weeks after randomisation.	52-54 weeks after randomisation
Mean Daily TOSS in Cat-PAD Compared to Placebo	Mean daily Total Ocular Symptom Score (TOSS) in Cat-PAD treatment groups compared to placebo groups TOSS was the sum of all the ocular symptom scores (itchy eyes; watery eyes; red eyes; sore eyes) and could range from 0 to 12. Higher TOSS reflected more severe symptoms. Subjects rated the severity of each symptom over the last 24 hours as follows: 0. absent; 1. mild, barely noticeable; 2. moderate, annoying/troublesome; 3. severe, very annoying/very troublesome. Symptoms were scored daily for a period of approximately 3 weeks. 52-54 weeks after randomisation.	52-54 weeks after randomisation
Mean RMS in Cat-PAD Compared With Placebo	Mean RMS (Rescue medication score) in Cat-PAD treatment groups compared with placebo groups. The use of rhinoconjunctivitis rescue medications was recorded by the subject on a daily basis just before bedtime for approximately 21 days, 52-54 weeks after randomisation and was scored based on a previously published system as follows: 0 = no allergy rescue medication used per day; 0.5 = at least one dose of antihistamine eye drops used per day; 1 = at least one dose of oral antihistamine used per day; 2 = at least one dose of intranasal corticosteroid used per day; 3 = at least one dose of systemic corticosteroid used per day. The score was according to the highest level of rescue medication used and was not additive.	52-54 weeks after randomisation
Mean RQLQ Score in Cat-PAD Compared With Placebo	The RQLQ (Rhinoconjunctivitis Quality of Life Questionnaire) was completed by subjects at the end of the study (52-54 weeks after randomisation). The RQLQ is a validated method of assessing quality of life and has 28 questions in seven domains (activity limitation, sleep problems, nasal symptoms, eye symptoms, non-nasal/eye symptoms, practical problems and emotional function). Subjects recalled how their rhinoconjunctivitis had been during the last week and responded to each question on a seven-point scale (0 = no impairment, 6 = maximum impairment). The questions were equally weighted, and the RQLQ score was the mean of the 28 questions and could range from zero to six.	52-54 weeks after randomisation
Number of Days With no Moderate or Severe TRSS Symptoms Without Rescue Medication Use	The number of well days, i.e., days with no moderately or severely annoying symptoms and with no rescue medication used was calculated for all subjects over a period of approximately 21 days, 52-54 weeks after randomisation.	52-54 week after randomisaiton

Collaborators and Investigators

• Sponsor: Circassia Limited
• Collaborators: inVentiv Health Clinical; Pharm-Olam International
• Investigators: Principal Investigator: Harold Nelson, MD, Jewish National Health

Study record dates

Study Major Dates

• Study Start: October 1, 2012
• Primary Completion (Actual): June 1, 2016

Study Registration Dates

• First Submitted: May 30, 2012
• First Submitted That Met QC Criteria: June 14, 2012
• First Posted (Estimate): June 15, 2012

Study Record Updates

• Last Update Posted (Actual): June 15, 2018
• Last Update Submitted That Met QC Criteria: May 16, 2018
• Last Verified: May 1, 2018

More Information

Terms related to this study

• Keywords: Rhinoconjunctivitis; Cat allergy
• Additional Relevant MeSH Terms: Eye Diseases; Conjunctival Diseases; Conjunctivitis
• Other Study ID Numbers: CP007