- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05109065
Peripheral Immune System in Individuals With Schizophrenia
Study Overview
Status
Intervention / Treatment
- Diagnostic test: SCID (Standardized Clinical Interview for DSM-V)
- Diagnostic test: PSS (Perceived Stress Score)
- Diagnostic test: Urine Toxicology Screen
- Diagnostic test: Vitals
- Diagnostic test: Blood Work
- Diagnostic test: COVID Screening
- Diagnostic test: Positive and Negative Syndrome Scale (PANSS)
- Diagnostic test: PQ-B
Detailed Description
Genetic studies have linked the number of copies coding for C4 protein to risk for schizophrenia. Studies examining the amount of mRNA, the molecules that point to how much C4 protein is likely being made, found more C4 mRNA in the brains from individuals with schizophrenia. Studies in mice have suggested that expressing more C4 protein in the brain, specifically the A-type of C4, can result in abnormalities in behavior. However, researchers have also found that pathways that involve this protein in the blood to be abnormal in individuals even before they develop schizophrenia and hypothesize these abnormalities change the blood brain barrier. In this work, the researchers are hoping to understand the ways in which C4 protein is abnormal in the peripheral blood and how this may be contributing to the disease process in hopes of finding new ways of helping individuals with schizophrenia and possibly other mental health disorders. A major goal of this study is to collect blood tissue for ongoing translational study of pathophysiological mechanisms of schizophrenia.
Interested participants will be asked a series of questions about their medical and mental health history, be able to provide informed consent, undergo a urine toxicology screen and be willing to provide a blood sample.
Study Type
Enrollment (Estimated)
Contacts and Locations
Study Contact
- Name: Diane E Wakeham, PhD
- Phone Number: 650-736-5243
- Email: wakeham@stanford.edu
Study Contact Backup
- Name: Study Coordinator
- Phone Number: 650-736-5243
Study Locations
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California
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Stanford, California, United States, 94704
- Recruiting
- Stanford University School of Medicine
-
Contact:
- Diane E Wakeham, PhD
- Phone Number: 650-736-5243
- Email: wakeham@stanford.edu
-
Contact:
- Study Coordinator
- Phone Number: 650-736-5243
-
Principal Investigator:
- Jong Yoon, MD
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Sampling Method
Study Population
Description
Inclusion Criteria for Subjects with schizophrenia and schizoaffective disorders:
- Schizophrenia or schizoaffective disorder diagnosis verified by interview
- Diagnosis or initiation of antipsychotic medication was within last 5 years
Inclusion Criteria for Healthy Controls:
- No known diagnosis of schizophrenia or schizoaffective disorder
- No history of depression, anxiety, bipolar disorder, PTSD, agoraphobia, panic disorder, or generalized anxiety disorder
- Negative assessment for psychotic symptoms on day of interview
Exclusion Criteria (for both groups):
- Participants have a history of bleeding disorders or are taking blood thinners.
- Participants have a history of epilepsy, known genetic disorders
- Immunocompromised state (eg., receiving immunosuppressive therapy, transplant).
- History of brain-related disease (eg., stroke)
- Any uncontrolled medical disorder such as cancer.
- History of substance abuse or positive urine toxicology screen (including test for marijuana) on the day of the blood draw
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Individuals with primary psychotic disorders
Participants who have received any of the following diagnoses: schizophrenia, schizoaffective disorder, or schizophreniform disorder. Participants will have urine toxicology screen, vitals recorded, and blood drawn in a single visit. |
The Structured Clinical Interview for DSM-5 (SCID-5) is a semistructured interview guide for a clinician or trained mental health professional to diagnose major mental illnesses.
The Perceived Stress Scale (PSS) is the most widely used psychological instrument for measuring the perception of stress.
It is a measure of the degree to which situations in one's life are appraised as stressful.
Items were designed to tap how unpredictable, uncontrollable, and overloaded respondents find their lives.
Demographic information will also be collected.
Participants will be asked to provide a urine sample.
Evidence of active substance abuse (marijuana, opioids, other non-prescription drugs) by the urine toxicology screen will disqualify participants from the study.
Height and weight will be measured in order to calculate BMI.
A venipuncture will be performed for the purpose of collecting blood tissue for study.
Questionnaire to assess risk of transmission of COVID-19.
Instrument that is completed by clinical interviewer to measure symptom severity in individuals with psychotic disorders.
|
Healthy Controls
Healthy participants who do not have any exclusion criteria will undergo an assessment to confirm absence of psychiatric disorder. Participants will have urine toxicology screen, vitals recorded, and blood drawn in a single visit. |
The Structured Clinical Interview for DSM-5 (SCID-5) is a semistructured interview guide for a clinician or trained mental health professional to diagnose major mental illnesses.
The Perceived Stress Scale (PSS) is the most widely used psychological instrument for measuring the perception of stress.
It is a measure of the degree to which situations in one's life are appraised as stressful.
Items were designed to tap how unpredictable, uncontrollable, and overloaded respondents find their lives.
Demographic information will also be collected.
Participants will be asked to provide a urine sample.
Evidence of active substance abuse (marijuana, opioids, other non-prescription drugs) by the urine toxicology screen will disqualify participants from the study.
Height and weight will be measured in order to calculate BMI.
A venipuncture will be performed for the purpose of collecting blood tissue for study.
Questionnaire to assess risk of transmission of COVID-19.
The Prodromal Questionnaire - Brief Version (PQ-B) is a self-report measure designed to identify people who may be experiencing psychotic symptoms when they do not have a schizophrenia diagnosis.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Group comparison of C4 protein in immune cells
Time Frame: Day 1
|
Measure the concentration of complement 4 protein in immune cells.
|
Day 1
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Body Mass Index and its relationship to C4 protein concentration
Time Frame: Day 1
|
The relationship between body mass index, calculated from the measured height and weight of participants, and the primary outcome (C4 protein concentration) will be determined.
|
Day 1
|
C4 Gene Copy Number
Time Frame: Day 1
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Determine the C4 Gene Copy Number its relationship to C4 protein concentration in immune cells.
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Day 1
|
C4 Activation
Time Frame: Day 1
|
Measure activity of C4 protein and its relationship to the primary outcome.
|
Day 1
|
Relationship to symptom presentation
Time Frame: Day 1
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Explore the relationship between clinical severity scores (PANSS) and the primary outcome.
|
Day 1
|
Relationship to stress
Time Frame: Day 1
|
Explore the relationship between perceived stress (PSS) and the primary outcome.
|
Day 1
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Jong Yoon, MD, Professor of Psychiatry and Behavior Sciences
Publications and helpful links
Helpful Links
- Laskaris, et.al. Schizophr Res . 2019 Feb;204:30-37.
- Mongan, et. al. Jama Psychiatry 2021;78(1):77-90
- Yilmaz, et. al. Nat Neurosci . 2021 Feb;24(2):214-224.
- Sekar, at al. Nature . 2016 Feb 11;530(7589):177-83.
- Radhakrishnan, et al. Mol Psychiatry . 2021 Jun 16.
- Onwordi, et. al. Transl Psychiatry . 2021 Jul 17;11(1):393.
- Onwordi, et. al. Nat Commun . 2020 Jan 14;11(1):246.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 58926
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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