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CTRI Number  CTRI/2021/11/037822 [Registered on: 03/11/2021] Trial Registered Prospectively
Last Modified On: 02/04/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Drug 
Study Design  Randomized, Parallel Group, Active Controlled Trial 
Public Title of Study   A Study Comparing Imetelstat Versus Best Available Therapy for the Treatment of Intermediate-2 or High-risk Myelofibrosis (MF) Who Have Not Responded to Janus Kinase (JAK)-Inhibitor Treatment 
Scientific Title of Study
Modification(s)  
A Randomized Open-Label, Phase 3 Study to Evaluate Imetelstat (GRN163L) Versus Best Available Therapy (BAT) in Patients with Intermediate-2 or High-risk Myelofibrosis (MF) Relapsed / Refractory (R/R) to Janus Kinase (JAK) Inhibitor 
Trial Acronym   
Secondary IDs if Any
Modification(s)  
Secondary ID  Identifier 
2020-003288-24  EudraCT 
GRN163LMYF3001 Amendment 3 / IND-3 dated 19-Sep-2024  Protocol Number 
NCT04576156  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

Modification(s)  
Name  Dr Annappa Kamath 
Designation  Executive Director Project Leadership 
Affiliation  PAREXEL International Clinical Research Private Limited 
Address  CoWrks, Coworking Spaces Pvt. Ltd. – RMZ Eco World, Ground Floor, Bay Area – Adjacent to Building 6A, Outer Ring Road, Devarabeesanahalli Village, BENGALURU – 560103, Karnataka, INDIA

Bangalore
KARNATAKA
560103
India 
Phone  919902096914  
Fax  918067723001  
Email  Annappa.Kamath@PAREXEL.com  
 
Details of Contact Person
Public Query

Modification(s)  
Name  Dr Annappa Kamath 
Designation  Executive Director Project Leadership 
Affiliation  PAREXEL International Clinical Research Private Limited 
Address  CoWrks, Coworking Spaces Pvt. Ltd. – RMZ Eco World, Ground Floor, Bay Area – Adjacent to Building 6A, Outer Ring Road, Devarabeesanahalli Village, BENGALURU – 560103, Karnataka, INDIA

Bangalore
KARNATAKA
560103
India 
Phone  919902096914  
Fax  918067723001  
Email  Annappa.Kamath@PAREXEL.com  
 
Source of Monetary or Material Support  
Geron Corporation 919 E. Hillsdale Blvd., Suite 250 Foster City, CA 94404  
 
Primary Sponsor  
Name  Geron Corporation 
Address  919 E. Hillsdale Blvd., Suite 250 Foster City, CA 94404  
Type of Sponsor  Pharmaceutical industry-Global 
 
Details of Secondary Sponsor  
Name  Address 
PAREXEL International Clinical Research Private Limited  CoWrks, Coworking Spaces Pvt. Ltd. – RMZ Eco World, Ground Floor, Bay Area – Adjacent to Building 6A, Outer Ring Road, Devarabeesanahalli Village, BENGALURU – 560103, Karnataka, INDIA 
 
Countries of Recruitment     Belgium
Brazil
Argentina
Australia
Austria
Bulgaria
Colombia
Denmark
France
Georgia
Germany
Hungary
India
Israel
Italy
Malaysia
Poland
Portugal
Republic of Korea
Russian Federation
Singapore
Spain
Switzerland
Taiwan
Turkey
United Kingdom
United States of America  
Sites of Study
Modification(s)  
No of Sites = 11  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Ashutosh Panigrahi  All India Institute of Medical Sciences  Department of Oncology/Hematology, Sijua, Patrapada, Bhubaneswar 751019
Khordha
ORISSA 
919437147517
06742476731
dr.ashupanigrahi@gmail.com 
Dr Manoranjan Mahapatra  All India Institute of Medical Sciences  Department of Hematology, Ansari Nagar, 110029
New Delhi
DELHI 
01126594670
911126588663
mrmahapatra@hotmail.com 
Dr Niti Raizada  Fortis Hospital Ltd  Department of Medical and Haemato oncology, 154/9, Bannerghatta Road, opp to IIM-B 560076
Bangalore
KARNATAKA 
8066214034
08066214444
nitiraizada@icloud.com 
Dr Meet P Kumar  Fortis Memorial Research institute  Clinical Research Department, 2nd Floor, Sector 44, Opposite Huda City Centre Metro Staion 122002
Gurgaon
HARYANA 
01244962200
01244962200
themeetkumar@gmail.com 
Dr Sameer Ramesh Melinkeri  LMMFs Deenanth Mangeshkar Hospital and Research Center  Department of Hematology, Erandawane 411004
Pune
MAHARASHTRA 
2049152023
02040151000
docmelinkeri@yahoo.com 
Dr Sharat Damodar  Mazumdar Shaw Medical Center  Department of Hemato Oncology and Adult BMT, 258 A, Bommasandra Industrial Area, Anekal Taluk, Hosur Road, Bengaluru-560099
Bangalore Rural
KARNATAKA 
18003090309

sharat.damodar.dr@narayanahealth.org 
Dr Tuphan Kanti Dolai  Nil Ratan Sircar Medical College and Hospital  Dept. Of Hematology 138, A.J.C Bose Road, 700014
Kolkata
WEST BENGAL 
9874890275
03322653215
tkdolai@hotmail.com 
Dr Hasmukh kumar Ranachhodbhai Balar  Nirmal Hospital Pvt Ltd  Dept of Hematology, Ring Road, Surat 395002
Surat
GUJARAT 
7030022663
02612333999
drhasmukhbalar@gmail.com 
Dr Shashikant Apte Janardan  Sahyadri Super Specialty Hospital  Department of Heamatology, 30C, Erandwane, karve Road, 411004
Pune
MAHARASHTRA 
9822404983
02067213000
shashikant.apte@gmail.com 
Dr Nitin Gupta  Sir Ganga Ram Hospital, Department of Clinical Hematology  Department of Clinical Hematology, Sir Ganga Ram Hospital Marg, Rajinder Nagar,110060
New Delhi
DELHI 
01142251412
01142251412
docnitingupta@gmail.com 
Dr Ross Cecil Reuben  St. Johns Medical College and Hospital  Department of Medicine and Haematology, Sarjapur Road, 560034
Bangalore
KARNATAKA 
8022065229
08022065008
cecilrross@gmail.com 
 
Details of Ethics Committee
Modification(s)  
No of Ethics Committees= 11  
Name of Committee  Approval Status 
Fortis Hospital Ethics Committee  Approved 
Institutional Ethics Committee St. Johns Medical College  Approved 
Institutional Ethics Committee, AIIMS Hospital, New Delhi  Approved 
Institutional Ethics Committee, All India Institute of Medical Sciences  Approved 
Institutional Ethics Committee, Fortis Memorial Research Institute  Approved 
Institutional Ethics Committee, Lata Mangeshkar Medical Foundation’s, Deenanath Mangeshkar Hospital and Research Centre  Approved 
Narayana Health Medical Ethics Committee  Approved 
Nirmal Hospital Pvt. ltd. Ethics Committee  Approved 
NRS Ethics Committee, Office of the Principal, NRS Medical College and Hospital  Approved 
Sahyadri Hospitals Limited Ethics Committee  Approved 
Sir Ganga Ram Hospital Ethics Committee  Approved 
 
Regulatory Clearance Status from DCGI
Modification(s)  
Status 
Approved/Obtained 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: D474||Osteomyelofibrosis,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Comparator Agent  Best Available Therapy (BAT)  Non-JAK-inhibitor treatment will be given, which may include but is not limited to hydroxyurea, thalidomide or an analog of thalidomide, interferon, danazol, hypomethylating agents, and chemotherapy 
Intervention  Imetelstat  Imetelstat will be given intravenously at 9.4 mg/kg every 21 days, until disease progression or unacceptable toxicity, treatment discontinuation or study end. Other Name: GRN163L  
 
Inclusion Criteria
Modification(s)  
Age From  18.00 Year(s)
Age To  99.00 Year(s)
Gender  Both 
Details  • Diagnosis of primary myelofibrosis according to the revised World Health Organization criteria or post-essential thrombocythemia-MF or post-polycythemia vera-MF according to the IWG-MRT criteria

• Dynamic International Prognostic Scoring System intermediate-2 or high-risk MF

• Relapsed/Refractory to JAK-inhibitor treatment as defined in either inclusion (i) or (ii):
(i) Treatment with JAK-inhibitor for greater than or equal to 6 months duration, including at least 2 months at an optimal dose as assessed by the investigator for that participant and one of the following:

1. no decrease in spleen volume (< 10% by MRI or CT) from the start of treatment with JAK-inhibitor

2. no decrease in spleen size (< 30% by palpation or length by imaging) from the start of treatment with JAK-inhibitor

3. no decrease in symptoms (< 20% by MFSAF or myeloproliferative neoplasm SAF) from the start of treatment with JAK-inhibitor)

4. a score of at least 15 on TSS assessed using the MFSAF v4.0 during screening.

(ii) Treatment with JAK-inhibitor treatment for greater than or equal to 3 months duration with maximal doses (e.g., 20-25 mg twice daily ruxolitinib) for that participant and no decrease in spleen volume/size or symptoms as defined in inclusion criterion (i [a, b, or c])
(iii) Following maximum tolerated doses of JAK inhibitor therapy for ≥3 months duration, having documented relapsed disease defined as either
1. Increase in spleen volume from time of best response by 25% measured by MRI or CT, or
2. Increase in spleen size by palpation, CT, or ultrasound
-For splenomegaly of 5-10 cm at the start of JAK inhibitor treatment, at least 100% increase in palpable spleen size from time of best response
- For splenomegaly of greater than 10 cm at the start of JAK inhibitor treatment, at least 50% increase in palpable spleen size from time of best response


• Measurable splenomegaly demonstrated by a palpable spleen measuring greater than or equal to 5 cm below the left costal margin or a spleen volume greater than or equal to 450 cm 3 by MRI or CT

• Active symptoms of MF on the MFSAF v4.0 demonstrated by a symptom score of at least 5 points (on a 0 to 10 scale)

• Hematology laboratory test values within the protocol defined limits

• Biochemical laboratory test values must be within protocol defined limits

• Eastern Cooperative Oncology Group Performance Status score of 0, 1, or 2

• Participants should follow protocol defined contraceptives procedures

• A woman of childbearing potential must have a negative serum or urine pregnancy test at screening

 
 
ExclusionCriteria 
Details  • Peripheral blood blast count of greater than or equal to 10% or bone marrow blast count of greater than or equal to 10%

• Known allergies, hypersensitivity, or intolerance to imetelstat or its excipients

• Prior treatment with imetelstat

• Any chemotherapy or MF directed therapy, including investigational drug regardless of class or mechanism of action, immunomodulatory or immunosuppressive therapy, corticosteroids greater than 30 mg/day prednisone or equivalent, and JAK-inhibitor treatment less than equal to 14 days prior to randomization

• Diagnosis or treatment for malignancy other than MF except

1. Malignancy treated with curative intent and with no known active disease present for greater than or equal to 3 years before randomization

2. Adequately treated non-melanoma skin cancer or lentigo maligna without evidence of disease

3. Adequately treated cervical carcinoma in situ without evidence of disease

• Known history of human immunodeficiency virus or any uncontrolled active systemic infection requiring IV antibiotics

• Active systemic hepatitis infection requiring treatment (carriers of hepatitis virus are permitted to enter the study), or any known acute or chronic liver disease unless related to underlying hepatosplenomegaly due to MF

• Major surgery within 28 days prior to randomization

• Any life-threatening illness (e.g. coronavirus disease-2019) medical condition, or organ system dysfunction which, in the investigators opinion, could compromise the participants safety, interfere with the imetelstat metabolism, or put the study outcomes at undue risk

 
 
Method of Generating Random Sequence   Stratified randomization 
Method of Concealment   Centralized 
Blinding/Masking   Open Label 
Primary Outcome  
Outcome  TimePoints 
Overall survival  Baseline (Day 1) until End of Study (EOS) (approximately 3 years) 
 
Secondary Outcome  
Outcome  TimePoints 
Symptom response rate  Baseline (Day 1), and at Week 24 
Progression-free survival  Baseline (Day 1) until End of Study (EOS) (approximately 3 years) 
Spleen response rate  Baseline (Day 1), and at Week 24 
Complete remission (CR), partial remission (PR), clinical improvement (CI), spleen response, symptoms response, and anemia response per modified 2013 IWG-MRT criteria  Baseline (Day 1) until End of Treatment (approximately 3 years) 
Reduction in the degree of bone marrow fibrosis  Baseline (Day 1) until End of Treatment (approximately 3 years) 
Number of Participants with Adverse Events  Screening (Day -28 to -1) until End of Study (approximately 3 years) 
Assessment of Cmax  Day 1 of all cycles (each cycle is 21 days) 
European Organization for Research and Treatment of Cancer Quality-of-Life-Questionnaire-Core-30 (EORTC QLQ-C30) scores  Baseline to End of Study (approximately 3 years) 
EuroQol-EQ-5D (EQ-5D-5L) questionnaire scores  Baseline to End of Study (approximately 3 years) 
Assessment of AUC  Day 1 of all cycles (each cycle is 21 days) 
 
Target Sample Size   Total Sample Size="320"
Sample Size from India="34" 
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)   31/12/2021 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  12/04/2021 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="3"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)
Modification(s)  
Open to Recruitment 
Recruitment Status of Trial (India)  Open to Recruitment 
Publication Details   • Gabriela M. Baerlocher, M.D., Telomerase Inhibitor Imetelstat in Patients with Essential Thrombocythemia, n engl j med 373;10 • Ayalew Tefferi, M.D., A Pilot Study of the Telomerase Inhibitor Imetelstat for Myelofibrosis, n engl j med 373;10 • Tefferi A, Imetelstat therapy in refractory anemia with ring sideroblasts with or without thrombocytosis, Blood cancer Journal (2016) 6, e405  
Individual Participant Data (IPD) Sharing Statement

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

Response - NO
Brief Summary
Modification(s)  

The purpose of the study is to evaluate the overall survival of participants treated with imetelstat compared to best available therapy with intermediate-2 or high-risk Myelofibrosis (MF) who are relapsed/refractory to Janus Kinase (JAK)-Inhibitor treatment

 
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