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CTRI Number  CTRI/2025/01/079061 [Registered on: 20/01/2025] Trial Registered Prospectively
Last Modified On: 20/01/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Drug 
Study Design  Other 
Public Title of Study   A Phase 3 Study of Barzolvolimab in Patients with Chronic Spontaneous Urticaria (EMBARQ-CSU2)  
Scientific Title of Study   A Phase 3 Randomized, Double-Blind, Placebo-Controlled Study to Assess the Efficacy and Safety of Barzolvolimab in Patients with Chronic Spontaneous Urticaria Who Remain Symptomatic Despite H1 Antihistamine Treatment (EMBARQ-CSU2)  
Trial Acronym  NIL 
Secondary IDs if Any  
Secondary ID  Identifier 
2024-513210-36-00  EudraCT 
CDX0159-13 V1 29-Mar-2024  Protocol Number 
IND: 140159  Other 
NCT06445023  ClinicalTrials.gov 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name   
Designation   
Affiliation   
Address 




 
Phone    
Fax    
Email    
 
Details of Contact Person
Scientific Query
 
Name  Rashmi Chitgupi 
Designation  Country Head - Clinical Management 
Affiliation  PPD Pharmaceutical development Pvt Ltd. 
Address  101, A Wing, Fulcrum Hiranandani Business Park, Andheri, Mumbai India

Mumbai
MAHARASHTRA
400099
India 
Phone  912266022900  
Fax    
Email  rashmi.chitgupi@ppd.com  
 
Details of Contact Person
Public Query
 
Name  Rashmi Chitgupi 
Designation  Country Head - Clinical Management 
Affiliation  PPD Pharmaceutical development Pvt Ltd. 
Address  101, A Wing, Fulcrum Hiranandani Business Park, Andheri, Mumbai India


MAHARASHTRA
400099
India 
Phone  912266022900  
Fax    
Email  rashmi.chitgupi@ppd.com  
 
Source of Monetary or Material Support  
Celldex Therapeutics, Inc. 53 Frontage Road, Suite 220 Hampton, NJ 08827 USA 
 
Primary Sponsor  
Name  Celldex Therapeutics, Inc. 
Address  53 Frontage Road, Suite 220 Hampton, NJ 08827 USA  
Type of Sponsor  Pharmaceutical industry-Global 
 
Details of Secondary Sponsor  
Name  Address 
PPD Pharmaceutical Development India Pvt Ltd  101 A Wing, Fulcrum, Hiranandani Business Park, Sahar Road, Andheri East, Mumbai 400099, Maharashtra, India 
 
Countries of Recruitment     Australia
Bulgaria
Canada
Chile
Colombia
Croatia
Georgia
Germany
Hungary
India
Italy
Lithuania
Mexico
Netherlands
Poland
Slovakia
Spain
Thailand
Tunisia
United Kingdom
United States of America  
Sites of Study  
No of Sites = 15  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Chandra Sirka  All India Institute of Medical Sciences  Sijua, Patrapada, Bhubaneswar- 751019
Khordha
ORISSA 
9438884055

dermat_chandra@aiimsbhubaneswar.edu.in 
Dr Suneel Vartak  Assured Care Plus Hospital  4th & 5th Floor, Star Plus Complex, Lam Road, Near Muktidham Temple, Opp. NMC Divisional office, Nashik Road, Nashik-422101
Nashik
MAHARASHTRA 
0253950011

suneel.vartak@gmail.com 
Dr Rima Joshi  B J Medical College and Civil Hospital  Department of Skin and VD, Asarwa, Ahmedabad-380016
Ahmadabad
GUJARAT 
9228585960

rimajoshi99@gmail.com 
Dr Vinay Kulkarni  Deenanath Mangeshkar Hospital & Research Centre  Madhubhau Chaudhari Department of Dermatology and Research Center, Main Building, 3rd Floor D wing, Erandwane, Pune-411004
Pune
MAHARASHTRA 
8605882649

vinay@prayaspune.org 
Dr Rashmi Mahajan   Dhiraj Hospital  Sumandeep Vidyapeeth Deemed to be University, At and Po. Piraia, Ta, Waghodia, Vadodara-391760
Vadodara
GUJARAT 
9227676607

rsoodmahajan@mail.com 
Dr Sakshi Midha  Excelcare Hospital  103, Sanjay Nagar-A, Joshi Marg, Kalwar Road, Jhotwara, Jaipur-302012
Jaipur
RAJASTHAN 
9001711113

sakshi.midha@gmail.com 
Dr Dev Prakash Shivhare  GSVM Medical College  Department of Dermatology, Swaroop Nagar, Kanpur-208002
Kanpur Nagar
UTTAR PRADESH 
9450136374

devprakash.80@gmail.com 
Dr Nanjundaswamy BL  K R Hospital attached to Mysore Medical College and Research Institute  Department of Dermatology, Irwin Road, Mysuru-570001
Mysore
KARNATAKA 
9448025219

drblmswami@gmail.com 
Dr Shivakumar Patil   KLES Dr. Prabhakar Kore Hospital and Medical  Research Centre, Nehru Nagar Belagavi – 590010
Belgaum
KARNATAKA 
9844512315

shivakumarkpatil@gmail.com 
Dr Nipul Vara  Medical College Baroda and SSG Hospital  Jail Road, Indira Avenue, Vadodara- 390001
Vadodara
GUJARAT 
9426074084

nipulvara@yahoo.co.in 
Dr Dipak Patel  Nirmal Hospital Pvt Ltd  Ring Road, Surat-395002,
Surat
GUJARAT 
9879573292

drdipakapatel@gmail.com 
Dr Hemant Kumar Talnikar  Oyster & Pearl Hospitals (Phadnis Clinic Pvt Ltd)  167175, Ganeshkhind Road, Shivajinagar, Pune-411005
Pune
MAHARASHTRA 
02067216600

drhemantkumart@gmail.com 
Dr Ajit Singh  RUHS College of Medical Sciences and Hospital  OPD Block, Sector-11. Kumbha Marg, Pratap Nagar, Jaipur302033
Jaipur
RAJASTHAN 
9829135692

dr.ajeetsingh@yahoo.com 
Dr Rajvee Shah  Sheth Vadilal Sarabhai General Hospital  Madalpur Gam, Paldi, Road, Ellisbridge, Ahmedabad-380006
Ahmadabad
GUJARAT 
9909007196

rajveeshah86.rk@gmail.com 
Dr Shyamal Balki  Shree Hospital & Critical Care Centre   799, Om Nagar, Opp. Tajshree Building, Sakkardara Sq., Nagpur-440009
Nagpur
MAHARASHTRA 
9665477444

drshyamalb@gmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 15  
Name of Committee  Approval Status 
ETHICS COMMITTEE GSVM Medical College  Approved 
IEC Lata Mangeshkar Medical Foundation’s Deenanath Mangeshkar Hospital and Research Centre  Submittted/Under Review 
IEC Sardarmal Khandaka Memorial Hospital  Approved 
Institutional Ethics Committee, Assured Care Plus Hospital  Submittted/Under Review 
Institutional Ethics Committee for Human Research (IECHR), Medical College & S.S.G. Hospital  Submittted/Under Review 
Institutional Ethics Committee, All India Institute of Medical Sciences, Sijua  Submittted/Under Review 
Institutional Ethics Committee, B. J. Medical College and Civil Hospital   Submittted/Under Review 
Institutional Ethics Committee, KLE University KLE Dr PK Hospital and MRC  Submittted/Under Review 
Institutional Ethics Committee, SV Sumandeep Vidyapeeth  Submittted/Under Review 
Institutional Ethics Committee- Mysore Medical College and Research Institute and Associated Hospitals  Submittted/Under Review 
Nirmal Hospital Ethics Committee  Approved 
O & P Institutional Ethics Committee  Approved 
Sangini Hospital Ethics Committee  Submittted/Under Review 
Shree Hospital Ethics Committee  Submittted/Under Review 
UHS CMS Ethics Committee  Submittted/Under Review 
 
Regulatory Clearance Status from DCGI  
Status 
Approved/Obtained 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: L508||Other urticaria,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Active Treatment Phase, Arm 1  Barzolvolimab 150 mg every 4 weeks (Q4W) 
Intervention  Active Treatment Phase, Arm 2  Barzolvolimab 300 mg every 8 weeks (Q8W)  
Intervention  Active Treatment Phase, Arm 3  Barzolvolimab 150 mg Q4W following a loading dose of 300 mg at Week 24 (Arm 3 Dose level 1), or barzolvolimab 300 mg Q8W following a loading dose of 450 mg at Week 24 (Arm 3 Dose level 2) (1:1 re-randomization of Arm 3 Placebo Q4W) 
Comparator Agent  Placebo-controlled Treatment Phase, Arm 1  Barzolvolimab 150 mg every 4 weeks (Q4W) following a loading dose of 300 mg on Day 1  
Comparator Agent  Placebo-controlled Treatment Phase, Arm 2  Barzolvolimab 300 mg every 8 weeks (Q8W) following a loading dose of 450 mg on Day 1 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  99.00 Year(s)
Gender  Both 
Details  1. Read, understood, and provided written informed consent, and Health Insurance Portability and Accountability Act (HIPAA) authorization if applicable, after the nature of the study has been fully explained. Participants must be able to provide informed consent themselves.

2. Male or female, greater than or equal to 18 years of age at the time of signing the informed consent.

3. Diagnosis of CSU greater than or equal to 6 months prior to Screening.

4. CSU refractory to a stable dose and regimen containing a second-generation H1AH as
defined by all of the following:
Recurrent pruritic wheals with or without angioedema for greater than or equal to 6 weeks at any time prior to Screening (Visit 1) despite treatment with a H1AH (hives consistent with CSU should be documented and confirmed by the investigator prior to randomization)
Participants must have been on a stable dose and regimen containing a second generation
H1 antihistamine (H1AH) at approved or increased (up to 4x approved) dose as background therapy for the treatment of CSU for greater than or equal to 4 weeks prior to randomization and which is expected to remain stable throughout the study.
UAS7 (range: 0 to 42) greater than or equal to 16 and ISS7 (range: 0 to 21) greater than or equal to 8 during the 7-day period
(Day -7 to Day -1) immediately prior to randomization.

5. Willing and able to comply with all study requirements and procedures, including the
completion of a daily symptom diary during screening and throughout the study.
 
 
ExclusionCriteria 
Details  1. Diseases with possible symptoms of urticaria or angioedema such as urticarial vasculitis, erythema multiforme, cutaneous mastocytosis (urticaria pigmentosa), autoimmune syndromes with urticarial lesions (e.g., Schnitzler Syndrome) and hereditary or acquired angioedema (e.g., due to C1 inhibitor deficiency).
2. Active chronic inducible urticaria (CIndU) including symptomatic dermographism (urticaria factitia), cold-, heat-, solar-, pressure-, delayed pressure-, aquagenic-, cholinergic-, or contact urticaria that would confound CSU assessments based on the investigators clinical judgment.
3. Any other active pruritic skin diseases that would confound CSU assessments based on the investigator clinical judgment.
4. Planned or anticipated use of any prohibited medications during screening and study
treatment, and follow-up.
5. Prior receipt of barzolvolimab or other anti-KIT therapy.

 
 
Method of Generating Random Sequence   Stratified randomization 
Method of Concealment   Centralized 
Blinding/Masking   Double Blind Double Dummy 
Primary Outcome  
Outcome  TimePoints 
Evaluate the clinical effect of barzolvolimab, compared to placebo, in reducing urticaria
activity as assessed by weekly urticaria activity score (UAS7) 
Week 12 
 
Secondary Outcome  
Outcome  TimePoints 
Evaluate the clinical effect of barzolvolimab, compared to placebo, in reducing urticaria
activity as assessed by weekly itch severity score (ISS7) and weekly hive severity score
(HSS7) 
Week 12 
valuate the clinical effect of barzolvolimab, compared to placebo, in reducing urticaria
activity in participants refractory to omalizumab treatment 
Week 12 
Evaluate the clinical effect of barzolvolimab, compared to placebo, in reducing urticaria activity  Weeks 4, 24, and 52 
Evaluate the clinical effect of barzolvolimab, compared to placebo, in reducing urticaria
activity in participants refractory to omalizumab treatment  
Weeks 4, 24, and 52  
Evaluate the clinical effect of barzolvolimab on the health-related quality of life   Weeks 12, 24, and 52  
 
Target Sample Size   Total Sample Size="915"
Sample Size from India="250" 
Final Enrollment numbers achieved (Total)= "Applicable only for Completed/Terminated trials"
Final Enrollment numbers achieved (India)="Applicable only for Completed/Terminated trials" 
Phase of Trial   Phase 3 
Date of First Enrollment (India)   10/02/2025 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  07/02/2025 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="1"
Months="4"
Days="24" 
Recruitment Status of Trial (Global)   Open to Recruitment 
Recruitment Status of Trial (India)  Open to Recruitment 
Publication Details   N/A 
Individual Participant Data (IPD) Sharing Statement

Will individual participant data (IPD) be shared publicly (including data dictionaries)?  

Response - NO
Brief Summary  
This is a phase 3, randomized, double-blind, placebo-controlled, parallel group study
evaluating the efficacy and safety profile of 2 dose regimens of barzolvolimab in patients with
CSU who remain symptomatic despite treatment with H1AH. There is a Screening Phase that
lasts 2 to 4 weeks, a 24-week Placebo-controlled Treatment Phase, a 28-week Active
Treatment Phase, and a 16-week Follow-up Phase. Participants randomized to placebo for the
Placebo-controlled Treatment Phase will undergo a re-randomization at Week 24 to determine
treatment assignment during the Active Treatment Phase. 
 
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