Microglial Activation in Inflammatory Bowel Disease
- Conditions
- Inflammatory Bowel DiseasesMajor Depressive Episode
- Interventions
- Radiation: [18F]FEPPA
- Registration Number
- NCT03487926
- Lead Sponsor
- Centre for Addiction and Mental Health
- Brief Summary
The purpose of this study is to monitor microglial activation in participants with inflammatory bowel disease (IBD) and investigate the relationship that exists between these patients and their risk of acquiring major depressive episodes (MDE). Patients with both IBD and MDE will be subsequently approached to participate in the study.
- Detailed Description
Detailed Description:
Participants may undergo up to 3 PET Scans : \[18F\]FEPPA PET (for TSPO) before and 3 to 6 months later and \[11C\]SL25.1188 PET (for MAO-B) as well as 1 MRI scan.
The primary hypothesis is that :
1. The neuroinflammation (TSPO VT) will be increased in PFC, ACC, and insula regions in those with inflammatory bowel disease (IBD) patients compared to healthy people.
2. The neuroinflammation (TSPO VT) in PFC, ACC, and insula regions will be reduced after treatment for IBD.
The Secondary Hypothesis:
1. Elevations in neuroinflammation (TSPO VT) will be similar in those with ulcerative colitis and Crohn's disease.
2. Neuroinflammation (TSPO VT) will be greater in IBD with depression than in depression without IBD.
3. Biologics (TNFalpha antibody treatments), and fecal transplantation will be associated with greater reduction in neuroinflammation in brain than Sulfasalazine/5-Aminosalicylates.
4. MAO-B VT will be elevated in in the PFC, ACC, and insula in IBD compared to healthy controls.
There will be no alterations to standard care of patients due to participation in the study.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 40
- Age 18 to 65
- aside from IBD groups and common comorbidities of IBD, otherwise good physical health with no current active medical conditions.
- a lifetime diagnosis of IBD verified by medical record, which can include prescription for IBD treatment
- no history of neurological illness, excluding migraine
- no use of glucocorticoid antagonists or lithium or medications that bind with affinity higher than 500nM to peripheral benzodiazepine receptors (or TSPO) in the previous two months
- no use of herbal remedies in the previous month that would be expected to influence neuroinflammation
- non-cigarette smoking
- no history of abuse of substances that affect mood and negative urine drug screens for substances of abuse including cotinine (urine drug screen is done at screening and on each PET scan day)
- no history of psychotic symptoms
- not pregnant based on a negative pregnancy test (for women)
- not breastfeeding (for women)
- no recent treatment with electroconvulsive therapy or magnetic seizure therapy in the previous 6 months
- no coagulation disorders, or anticoagulant medication use
- no presence of metal objects or implanted electrical devices in the body that would preclude MRI scanning
- no claustrophobia
- no self-reported history of fainting from blood withdrawals
- size and weight does not exceed capacity of scanner, for which size may vary and weight is 350 lbs
- no history of undergoing a number of PET scans that, including the number of PET scans under this protocol, will bring the total to more than 8 PET scans/lifetime, exceeding permissible limit for subjects participating in research set by our centre's guidelines
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Arm && Interventions
Group Intervention Description Group 1 (IBD primary diagnosis) [18F]FEPPA Participants have active IBD Group 3-Controls [18F]FEPPA Matched for Level of Depressive Symptoms and Otherwise Healthy -Subjects in an otherwise healthy state with major depressive episodes, obsessive compulsive disorder, or generalized anxiety disorder will provide psychiatric diagnosis matched controls to those with IBD. Data for group three will be largely obtained from previous recent studies (it is anticipated that 95% of this data is already available). Group 2( IBD + comorbid MDE) [18F]FEPPA 1 \[18F\]FEPPA PET scan in those with IBD symptoms in the past 2 years as well present with MDE
- Primary Outcome Measures
Name Time Method change in TSPO VT in prefrontal cortex, anterior cingulate cortex, and insula before and after 3 to 6 months 3 to 6 months Change in TSPO VT for three regions (same units for each region)
TSPO VT in prefrontal cortex, anterior cingulate cortex, and insula within 3 to 4 weeks after initiation of screening Between group comparison for 3 regions in IBD compared to controls (analysis done concurrently for group effect across 3 regions)
MAO-B VT in prefrontal cortex, anterior cingulate cortex, insula in IBD compared to controls within 3 to 4 weeks after initiation of screening Between group comparison for 3 regions in IBD compared to controls
- Secondary Outcome Measures
Name Time Method change in TSPO VT in prefrontal cortex, anterior cingulate cortex, insula compared between naturalistic treatment with sulfasalazine/5-aminosalicylates versus other interventions like biologics or fecal transplantation 3 to 6 months differential change in TSPO VT across 3 regions before and after 6 months in those receiving naturalistic treatment with sulfasalazine/5-aminosalicylates versus other naturalistic treatments of fecal transplantation or biologics
TSPO VT in prefrontal cortex, anterior cingulate cortex, insula compared between Crohns disease and ulcerative colitis within 3 to 4 weeks of initiating screening of subjects comparison of TSPO VT in 3 regions between two types of inflammatory bowel disease
TSPO VT in prefrontal cortex, anterior cingulate cortex, insula compared between IBD with MDE compared to MDE controls within 3 to 4 weeks after initiation of screening Between group comparison for 3 regions in IBD compared to controls
Trial Locations
- Locations (1)
Centre for Addiction and Mental Health
🇨🇦Toronto, Ontario, Canada