Protocol summary

Study aim
Investigate the effect of probiotic supplementation on pain,sleep ,intestinal composition in patients with Fibromyalgia.
Design
Present study was designed in two phases : in this phase , the composition of intestinal microbiome and biomarkers - inflammatory markers in female patients with Fibromyalgia ( based on ACR-2016) were compared with healthy group matche in terms of age and body mass index (BMI). Blood and feces samples from both groups are collected and analyzed to identify disbiosispatterns and inflammatory markers. in the second phase (double - blind clinical trial ) , the patient participants were randomly divided into two intervention groups ( receiving probiotic lactobacillus rhamnosus and Bifidobacterium longum ) and control group ( placebo ) for 8 weeks .in both groups ,blood and feces samples were collected in two times ( before and after the intervention ) . Severity of pain , sleep quality , and mental status were assessed with the standard questionnaires ( vas , BPI , HADS , and PSQI ) at both times .also , the levels of inflammatory cytokines (Il - 6 ,TNF- α, CRP, bdnf ) and intestinal metabolites ( SCFA ) will be measured .
Settings and conduct
Imam khomeini hospital complex
Participants/Inclusion and exclusion criteria
Patients : women aged 55 - 18 ( based on acr - 2016 criteria ) . Controls ( case - control part ) : healthy women , age and BMI
Intervention groups
* daily intake of a probiotic capsule containing : - Lactobacillus rhamnosus (10 cfu) - Bifidobacterium longum (10 cfu) Time : 8 weeks
Main outcome variables
1. Pain intensity 2. Sleep quality 3. Gut microbiome composition 4. Levels of inflammatory markers (IL-6, TNF-α, CRP) 5. Gut metabolites (short-chain fatty acids)

General information

Reason for update
Acronym
IRCT registration information
IRCT registration number: IRCT20260315068995N1
Registration date: 2026-04-13, 1405/01/24
Registration timing: prospective

Last update: 2026-04-13, 1405/01/24
Update count: 0
Registration date
2026-04-13, 1405/01/24
Registrant information
Name
Sepideh Khodaparast
Name of organization / entity
Country
Iran (Islamic Republic of)
Phone
+98 21 6658 1560
Email address
skhodaparast@sina.tums.ac.ir
Recruitment status
recruiting
Funding source
Expected recruitment start date
2026-05-22, 1405/03/01
Expected recruitment end date
2027-05-21, 1406/02/31
Actual recruitment start date
empty
Actual recruitment end date
empty
Trial completion date
empty
Scientific title
Gut Microbiome Composition and Response to Probiotic Intervention in Patients with Fibromyalgia using a Neurobiological Approach
Public title
Gut Microbiome Composition and Response to Probiotic Intervention in Patients with Fibromyalgia using a Neurobiological Approach
Purpose
Health service research
Inclusion/Exclusion criteria
Inclusion criteria:
Definitive diagnosis of فیبرومیالژیا based on acr - 2016 . Participate and sign the consent form . Antibiotic or probiotic consumption in the past four weeks Lack of inflammatory bowel disease or severe psychiatric disorders .
Exclusion criteria:
Pregnancy or lactation .history of gi tract surgery . Consumption of immunosuppressive drugs . Lack of adherence to intervention or withdrawal during the study .
Age
From 18 years old to 55 years old
Gender
Female
Phase
N/A
Groups that have been masked
  • Participant
  • Investigator
Sample size
Target sample size: 42
Randomization (investigator's opinion)
Randomized
Randomization description
1.Details of the Randomization Process: In this study, randomization is performed by allocating patients to intervention and control groups using random blocks in a 1:1 ratio. This method ensures that the distribution of patients in each group is random and unbiased. 2.Linguistic Consistency on Both Sides: In the design and reporting of this study, all terms and expressions have been applied consistently and harmoniously on both sides to ensure that there is no ambiguity in the interpretation of the results. 3.Randomization Method: In this study, the randomization method is precisely determined by allocating patients using random blocks and implementing double blinding (so that both patients and researchers are unaware of group assignments). Additionally, the supplements are coded and packaged by an independent individual to prevent any bias.
Blinding (investigator's opinion)
Double blinded
Blinding description
Description of the Blinding Method: In this study, double blinding is fully implemented. This means that both patients and researchers will be unaware of group assignments. Patients are randomly allocated to the intervention and control groups, and all information related to the groups is managed in a coded manner by an independent individual. This person is responsible for the packaging and distribution of the supplements, ensuring that they have no knowledge of the type of intervention the patients receive. This approach ensures that there is no bias in the assessment of the results. Linguistic Consistency on Both Sides: All terms and expressions have been used consistently and harmoniously on both sides (Persian and English) to ensure that there is no ambiguity in the interpretation of the findings.
Placebo
Used
Assignment
Crossover
Other design features

Secondary Ids

empty

Ethics committees

1

Ethics committee
Name of ethics committee
Ethics committee of Tehran University of Medical Sciences
Street address
Keshavarz Blvd. Tehran, Iran
City
Tehran
Province
Tehran
Postal code
1419733141
Approval date
2025-12-18, 1404/09/27
Ethics committee reference number
IR.TUMS.IKHC.REC.1404.398

Health conditions studied

1

Description of health condition studied
Fibromyalgia
ICD-10 code
ICD-10 code description

Primary outcomes

1

Description
Receive or receive probiotic capsules as an intervention
Timepoint
8 weeks
Method of measurement
Recording the intervention or control group ( placebo )

Secondary outcomes

empty

Intervention groups

1

Description
Intervention group: In interventional phase , eligible patients were divided into two groups : intervention and control groups using randomized block design with 1 : 1 ratio .two - way کورسازی is done by the codification of supplements and the use of an independent individual to manage allocation .
Category
Placebo

Recruitment centers

1

Recruitment center
Name of recruitment center
Imam khomeini hospital complex
Full name of responsible person
Dr. Sepideh Khodaparast
Street address
Tehran University of Medical Sciences (TUMS), Tehran, Iran. Keshavarz Blvd. Tehran, Iran
City
Tehran
Province
Tehran
Postal code
1419733141
Phone
+98 912 593 9600
Fax
+98 21 6693 8885
Email
skhodaparast@sina.tums.ac.ir

Sponsors / Funding sources

1

Sponsor
Name of organization / entity
Tehran University of Medical Sciences
Full name of responsible person
Ccenter of the medical research institute of tehran university of medical sciences
Street address
Tehran University of Medical Sciences (TUMS), Tehran, Iran. Keshavarz Blvd. Tehran, Iran. Postal code: 1419733141.
City
Tehran
Province
Tehran
Postal code
1419733141
Phone
+98 912 593 9600
Fax
+98 66 5815 6061
Email
skhodaparast@sina.tums.ac.ir
Grant name
Grant code / Reference number
Is the source of funding the same sponsor organization/entity?
Yes
Title of funding source
Tehran University of Medical Sciences
Proportion provided by this source
100
Public or private sector
Public
Domestic or foreign origin
Domestic
Category of foreign source of funding
empty
Country of origin
Type of organization providing the funding
Academic

Person responsible for general inquiries

Contact
Name of organization / entity
Tehran University of Medical Sciences
Full name of responsible person
Dr. Sepideh Khodaparast
Position
Assistant Professor at Brain and spinal cord injury research Centre, Neuroscience Institute, Tehran
Latest degree
Ph.D.
Other areas of specialty/work
Laboratory Medicine
Street address
Tehran University of Medical Sciences (TUMS), Tehran, Iran. Keshavarz Blvd. Tehran, Iran. Postal code: 1419733141.
City
Tehran
Province
Tehran
Postal code
1419733141
Phone
+98 66 5815 6061
Fax
Email
skhodaparast@sina.tums.ac.ir

Person responsible for scientific inquiries

Contact
Name of organization / entity
Tehran University of Medical Sciences
Full name of responsible person
Dr. Sepideh Khodaparast
Position
Assistant Professor at Brain and spinal cord injury research Centre, Neuroscience Institute, Tehran
Latest degree
Ph.D.
Other areas of specialty/work
Laboratory Medicine
Street address
Tehran University of Medical Sciences (TUMS), Tehran, Iran. Keshavarz Blvd. Tehran, Iran. Postal code: 1419733141.
City
Tehran
Province
Tehran
Postal code
1419733141
Phone
+98 66 5815 6061
Fax
Email
skhodaparast@sina.tums.ac.ir

Person responsible for updating data

Contact
Name of organization / entity
Tehran University of Medical Sciences
Full name of responsible person
Dr. Sepideh Khodaparast
Position
Assistant Professor at Brain and spinal cord injury research Centre, Neuroscience Institute, Tehran
Latest degree
Ph.D.
Other areas of specialty/work
Laboratory Medicine
Street address
Tehran University of Medical Sciences (TUMS), Tehran, Iran. Keshavarz Blvd. Tehran, Iran. Postal code: 1419733141.
City
Tehran
Province
Tehran
Postal code
1419733141
Phone
+98 66 5815 6061
Fax
Email
skhodaparast@sina.tums.ac.ir

Sharing plan

Deidentified Individual Participant Data Set (IPD)
No - There is not a plan to make this available
Justification/reason for indecision/not sharing IPD
I haven 't decided yet - the release schedule is not yet clear .
Study Protocol
Undecided - It is not yet known if there will be a plan to make this available
Statistical Analysis Plan
Undecided - It is not yet known if there will be a plan to make this available
Informed Consent Form
Undecided - It is not yet known if there will be a plan to make this available
Clinical Study Report
Undecided - It is not yet known if there will be a plan to make this available
Analytic Code
Undecided - It is not yet known if there will be a plan to make this available
Data Dictionary
Undecided - It is not yet known if there will be a plan to make this available
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