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CTRI Number  CTRI/2025/12/099888 [Registered on: 29/12/2025] Trial Registered Prospectively
Last Modified On: 24/12/2025
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Drug 
Study Design  Randomized, Parallel Group, Multiple Arm Trial 
Public Title of Study   A study to compare different long-term treatments in people with Myelin Oligodendrocyte Glycoprotein antibody-associated disease (MOGAD) 
Scientific Title of Study   Comparative Efficacy of Maintenance immunomodulatory therapies in Myelin Oligodendrocyte Glycoprotein antibody associated disease- an open label randomised controlled trial with blinded outcome (CEM-MOG study) 
Trial Acronym  CEM-MOG 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Dr Rohit Bhatia  
Designation  Professor  
Affiliation  All India Institute of Medical sciences , New Delhi  
Address  Room No. 603, 6th floor , CN centre , Department of Neurology , AIIMS , New Delhi

South West
DELHI
110029
India 
Phone  919891267417  
Fax    
Email  rohitbhatia71@yahoo.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Rohit Bhatia  
Designation  Professor  
Affiliation  All India Institute of Medical sciences , New Delhi  
Address  Room No. 603, 6th floor , CN centre , Department of Neurology , AIIMS , New Delhi

South West
DELHI
110029
India 
Phone  919891267417  
Fax    
Email  rohitbhatia71@yahoo.com  
 
Details of Contact Person
Public Query
 
Name  Dr Rohit Bhatia  
Designation  Professor  
Affiliation  All India Institute of Medical sciences , New Delhi  
Address  Room No. 603, 6th floor , CN centre , Department of Neurology , AIIMS , New Delhi

South West
DELHI
110029
India 
Phone  919891267417  
Fax    
Email  rohitbhatia71@yahoo.com  
 
Source of Monetary or Material Support  
Indian Council of Medical Research V. Ramalingaswami Bhawan, Ansari Nagar, New Delhi - 110029, near AIIMS, with a P.O. Box No. 4911 
 
Primary Sponsor  
Name  Indian Council of Medical Research 
Address  V. Ramalingaswami Bhawan, P.O. Box No. 4911, Ansari Nagar, New Delhi - 110029, India  
Type of Sponsor  Government funding agency 
 
Details of Secondary Sponsor  
Name  Address 
NIL  NIL 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 5  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Netravathi M  National Institute of Mental Health and Neuro Sciences NIMHANS  Department of Neurology , National Institute of Mental Health and Neuro Sciences NIMHANS No 29 Marigowda Road Hosur Road Bangalore 560029
Bangalore
KARNATAKA 
9880106662

sundernetra@yahoo.co.in 
Dr Sruthi Nair  Sree Chitra Tirunal Institute for Medical Sciences and Technology SCTIMST   Department of Neurology , SCTIMST, Jai Nagar W Road, Aakulam, Thiruvananthapuram - 695 011
Thiruvananthapuram
KERALA 
9895045032

sruthisn@sctimst.ac.in 
Dr Rohit Bhatia  All India Institute of Medical Sciences AlIMS New Delhi   Ansari NagaR New Delhi 110029
South West
DELHI 
09891267417

rohitbhatia71@yahoo.com 
Dr Dheeraj Khurana   Postgraduate Institute of Medical Education and Research PGIMER  Department of Neurology , PGIMER, Sector 12, Chandigarh
Chandigarh
CHANDIGARH 
9815066990

dherajk@yahoo.com 
Dr Thomas Mathew  St. Johns Medical College  Department of Neurology , St. Johns Medical College Sarjapura Main Road Koramangala 560034
Bangalore
KARNATAKA 
9880247582

chakkuthom@hotmail.com 
 
Details of Ethics Committee  
No of Ethics Committees= 5  
Name of Committee  Approval Status 
Institute ethics committee, AIIMS, New Delhi   Approved 
NIMHANS IEC  Approved 
PGI Institutional Ethics Committee  Submittted/Under Review 
SCTIMST Institue Ethics Committee  Submittted/Under Review 
St Johns Medical College Institutional Ethics committee  Submittted/Under Review 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: G378||Other specified demyelinating diseases of central nervous system,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  Injection Rituximab  Induction dose 2 g (1 g × 2 infusions, 14 days apart), followed by 500–600 mg every 6 months per protocol. Premedication as per guidelines; vaccination optional. Route: intravenous. 
Comparator Agent  NIL   NIL 
Intervention  Tablet Azathioprine  Started at 25 mg/day and increased by 25–50 mg weekly to a target of ~2 mg/kg/day with CBC and LFT monitoring (weekly × 4 weeks, monthly × 3 months, then every 3 months). Route: oral. 
Intervention  Tablet Mycophenolate Mofetil  Started at 500 mg once daily and increased by 500 mg weekly to a total dose of 2 g/day with CBC and LFT monitoring (weekly × 4 weeks, monthly × 3 months, then every 3 months). Route: oral. 
Intervention  Tablet Prednisolone   Tablet prednisolone will be given at a dose of 1 mg/kg per day in all patients.A standard steroid tapering schedule would be used. Prednisolone would be continued at a full dose for a period of 6-8 weeks and then tapered slowly by 5 mg every week until it is stopped. The treating physician has the freedom to either stop the steroid completely or maintain on a small dose. For Rituximab arm the steroid full dose will be given for 4 weeks and then a similar steroid tapering schedule would be used. 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  99.00 Year(s)
Gender  Both 
Details  Adult patients (18 years and above).

Diagnosed with MOGAD with a typical clinical phenotype in the form of optic neuritis, myelitis, tumefactive demyelination and acute disseminated encephalitis/encephalomyelitis and positive MOG antibody using a cell based study and fulfilling the Lancet 2023 consensus criteria for MOGAD.

Not on active immunosuppression

Written informed consent 
 
ExclusionCriteria 
Details  Current or a prior history of receiving any form of immunomodulation other than oral
steroids
Diagnosis other than MOGAD
Contraindication to the use of these agents
Denial of consent 
 
Method of Generating Random Sequence   Permuted block randomization, fixed 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Outcome Assessor Blinded 
Primary Outcome  
Outcome  TimePoints 
The proportion of patients who remained relapse-free at 2 years while receiving each of the maintenance immunotherapies .  Each patient will be followed up at 6,12,18,24 months.  
 
Secondary Outcome  
Outcome  TimePoints 
Time to first relapse  Each patient will be followed up at 6,12,18,24 months.  
EDSS at last follow up   Each patient will be followed up at 6,12,18,24 months.  
Change of disease modifying treatment   Each patient will be followed up at 6,12,18,24 months.  
Any adverse event   Each patient will be followed up at 6,12,18,24 months.  
Any serious adverse event   Each patient will be followed up at 6,12,18,24 months.  
Any Infection during study period   Each patient will be followed up at 6,12,18,24 months.  
 
Target Sample Size   Total Sample Size="120"
Sample Size from India="120" 
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   N/A 
Date of First Enrollment (India)   15/01/2026 
Date of Study Completion (India) Applicable only for Completed/Terminated trials 
Date of First Enrollment (Global)  Date Missing 
Date of Study Completion (Global) Applicable only for Completed/Terminated trials 
Estimated Duration of Trial   Years="3"
Months="3"
Days="0" 
Recruitment Status of Trial (Global)   Not Applicable 
Recruitment Status of Trial (India)  Not Yet Recruiting 
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  
Introduction Myelin Oligodendrocyte Glycoprotein Antibody Associated Disease MOGAD is a heterogeneous neuroimmunological disease with a spectrum of clinical manifestations which include optic neuritis myelitis encephalomyelitis or encephalitis alone or in combination. A considerable number of patients  approximately 50 percent have a relapsing course. There is an absence of Level 1 evidence for choice of maintenance immunosuppression in these patients. A randomised controlled trial is needed to guide treatment decisions. This study will be the first ever randomised controlled trial in the world to evaluate the comparative efficacy of commonly used therapeutic maintenance immunomodulatory therapies among patients with MOGAD. 
Objectives The primary objective is to compare the efficacy of Azathioprine or Mycophenolate Mofetil or Rituximab in preventing relapses among patients with MOGAD as defined by proportion of patients who are relapse free for at least 2 years of follow up. 
Methods In this multicenter open label randomised trial with blinded outcomes all adult MOGAD patients diagnosed as per the Lancet 2023 criteria would be included and randomised equally in permuted block randomisation to receive either AZA or MMF or RTX. The proportion of patients who are relapse free at the end of the follow up period of 2 years would be calculated. 
Expected outcome The study will help ascertain benefits of individual medications and help compare efficacy between them. Since there is no data on head to head comparative studies in this group of patients the study may help decide choice of medications among MOGAD patients.
 
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