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CTRI Number  CTRI/2020/06/026165 [Registered on: 26/06/2020] Trial Registered Prospectively
Last Modified On: 19/07/2023
Post Graduate Thesis  No 
Type of Trial  Interventional 
Type of Study   Drug 
Study Design  Randomized, Parallel Group Trial 
Public Title of Study   Clinical trial for prevention of radiotherapy induced dry mouth in patients with oropharyngeal cancer 
Scientific Title of Study   Prevention of Radiotherapy Induced Xerostomia by Intraductal Administration of N-Acetyl Cysteine in Patients with Oropharyngeal Malignancies: A Randomized Clinical Trial 
Trial Acronym  NAC-RIX 
Secondary IDs if Any  
Secondary ID  Identifier 
NIL  NIL 
 
Details of Principal Investigator or overall Trial Coordinator (multi-center study)  
Name  Dr Arvind Kumar Kairo 
Designation  Associate Professor 
Affiliation  All India Institute of Medical Sciences, Delhi  
Address  Rno 4057, Teaching Block, Department of Otorhinolaryngology, All India Institute of Medical Sciences, Ansari Nagar

New Delhi
DELHI
110029
India 
Phone  9868491991  
Fax    
Email  arvindkairo@yahoo.com  
 
Details of Contact Person
Scientific Query
 
Name  Dr Arvind Kumar Kairo 
Designation  Associate Professor 
Affiliation  All India Institute of Medical Sciences, Delhi  
Address  Rno 4057, Teaching Block, Department of Otorhinolaryngology, All India Institute of Medical Sciences, Ansari Nagar

New Delhi
DELHI
110029
India 
Phone  9868491991  
Fax    
Email  arvindkairo@yahoo.com  
 
Details of Contact Person
Public Query
 
Name  Dr Arvind Kumar Kairo 
Designation  Associate Professor 
Affiliation  All India Institute of Medical Sciences, Delhi  
Address  Rno 4057, Teaching Block, Department of Otorhinolaryngology, All India Institute of Medical Sciences, Ansari Nagar

New Delhi
DELHI
110029
India 
Phone  9868491991  
Fax    
Email  arvindkairo@yahoo.com  
 
Source of Monetary or Material Support  
Indian Council of Medical Research, New Delhi 
 
Primary Sponsor  
Name  Dr Arvind Kumar Kairo 
Address  Department of Otorhinolaryngology, AIIMS, New Delhi  
Type of Sponsor  Other [Self] 
 
Details of Secondary Sponsor  
Name  Address 
Dr Ahitagni Biswas  Department of Radioptherapy, AIIMS 
Dr Alok Thakkar  Department of ENT, AIIMS 
Dr Pooja Gupta  Department of Pharmacology, AIIMS 
 
Countries of Recruitment     India  
Sites of Study  
No of Sites = 1  
Name of Principal Investigator  Name of Site  Site Address  Phone/Fax/Email 
Dr Arvind Kumar Kairo  AIIMS, New Delhi  Departments of ENT, Radiotherapy, Pharmacology
New Delhi
DELHI 
9868491991

arvindkairo@yahoo.com 
 
Details of Ethics Committee  
No of Ethics Committees= 1  
Name of Committee  Approval Status 
Institute Ethics Committee, All India Institute of Medical Sciences, New Delhi  Approved 
 
Regulatory Clearance Status from DCGI  
Status 
Not Applicable 
 
Health Condition / Problems Studied  
Health Type  Condition 
Patients  (1) ICD-10 Condition: C109||Malignant neoplasm of oropharynx,unspecified,  
 
Intervention / Comparator Agent  
Type  Name  Details 
Intervention  N-acetyl cysteine (NAC)  3-5 ml of 2% NAC will be given as bilateral instillation in the duct of submandibular salivary gland before each radiotherapy fraction for 6-7 weeks 
Comparator Agent  Normal saline  3-5 ml normal saline will be given as bilateral instillation in the duct of submandibular salivary gland before each radiotherapy fraction for 6-7 weeks 
 
Inclusion Criteria  
Age From  18.00 Year(s)
Age To  70.00 Year(s)
Gender  Both 
Details  1. Patients of oropharyngeal carcinoma
2. Either gender with age between 18-70 years (both inclusive)
3. Planned for radical external beam radiotherapy  
 
ExclusionCriteria 
Details  1. Patients with decreased mouth opening
2. A coexisting disease causing xerostomia
3. Revision cases
4. Denial for consent 
 
Method of Generating Random Sequence   Computer generated randomization 
Method of Concealment   Sequentially numbered, sealed, opaque envelopes 
Blinding/Masking   Open Label 
Primary Outcome  
Outcome  TimePoints 
Difference in severity grading of xerostomia according to RTOG EORTC scoring system   2 weeks, 3 months, 6 months and 1 year 
 
Secondary Outcome  
Outcome  TimePoints 
Quantity (in ml) of stimulated saliva  2 weeks, 3 months, 6 months and 1 year 
pH and viscosity of and IgA levels in saliva   2 weeks, 3 months, 6 months and 1 year 
Change in quality of life  2 weeks, 3 months, 6 months and 1 year 
 
Target Sample Size   Total Sample Size="60"
Sample Size from India="60" 
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)   01/07/2020 
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="2"
Months="0"
Days="0" 
Recruitment Status of Trial (Global)
Modification(s)  
Not Applicable 
Recruitment Status of Trial (India)  Open to Recruitment 
Publication Details   Nil 
Individual Participant Data (IPD) Sharing Statement

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

Brief Summary  
Oropharyangeal cancer constitutes a substantial proportion of head and neck cancers and is prevalent worldwide including India. Radiotherapy-induced xerostomia (RIX) occurs in around 70 percent of the cases undergoing radiation therapy. The symptoms affect the quality of life of the patients considerably and no therapy has been proven reasonably effective to prevent or treat the complication. The complications arise due to proximity of the salivary glands to the target affected tissue. Evidence suggests that such damage occurs due to free radicals generated by radiotherapy which on one hand kills the tumor tissues while also collaterally damaging the salivary glands. 
This study will use a well-established antioxidant which is considered safe i.e. N-Acetyl cysteine (NAC). It has free radical scavenging property to prevent the free radical induced injury to salivary glands. The local use of NAC will likely prevent this collateral damage in disease free glands. If the results are gained as expected, the therapy would stand to be safe, effective and cheap as a preventive measure against RIX.
 
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