- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02456168
Development of a Novel Glutamate Receptor Ligand for PET Scans in Neuropsychiatric Systemic Lupus Erythematosus
Study Overview
Status
Conditions
Detailed Description
Neuropsychiatric lupus is comprised of numerous, complex central and peripheral nervous system symptoms whose pathophysiologic mechanisms remain poorly understood. Cross-reactive anti-dsDNA antibodies have been shown to bind NR2A/NR2B subunits of the N-methyl D-aspartate receptor (NMDAR) on neurons and synergize with glutamate in a concentration dependent manner to either modulate receptor function or cause an excitotoxic, non-inflammatory neuronal death. Mice immunized to express anti-NMDAR Aab demonstrate a causal relationship between anti-NMDAR Aab and persistent behavioral and cognitive neuropathology following compromise to the blood brain barrier (BBB) which is necessary for Aab access to the brain.
The investigators' previous cross-sectional FDG-PET studies of resting brain glucose metabolism demonstrate robust hypermetabolism in the hippocampus of SLE subjects that associates independently with serum Anti-NMDAR Aab titer and impaired memory. Moreover, the combination of hippocampus hypermetabolism and elevated serum titers of Anti-NMDAR Aab has a higher predictive value for memory impairment than either variable alone. These significant correlations must be tested in a longitudinal study to evaluate the utility of FDG-PET as a biomarker for Anti-NMDAR Aab-mediated brain damage. The proposed longitudinal studies will inform the investigators about correlates of cognitive and behavioral change over time using FDG-PET imaging (Aim 1). Additionally, the investigators will explore NMDAR biology with a novel PET ligand, [11C]-CNS5161, used to localize and quantify NMDAR activation (Aim 2) and explore the role of blood brain barrier (BBB) integrity in cognitive and behavioral impairment (Aim 3).
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
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New York
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Manhasset, New York, United States, 11030
- The Feinstein Institute for Medical Research
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Must be ≥18 and ≤55 years of age.
- Must fulfill the current American College of Rheumatology (ACR) revised criteria for the diagnosis of SLE.
- Must be willing and able to sign informed consent.
- Must have stable disease activity and medication doses for 8 weeks prior to screening.
Exclusion Criteria:
- History of neurological diseases including head injury resulting in a loss of consciousness, strokes (secondary to hypertension, atherosclerosis, diabetes), seizures, toxic exposure, any difficulties at birth, mental retardation.
- History of documented transient ischemic attacks within six months of screening.
- Currently taking anti-convulsant medication.
- Limited fluency with English that in the opinion of the investigator would limit the subject's performance on the ACR battery of cognitive tests or the N-back task chosen for the working memory task during the PET scan.
- History of illicit drug use (cocaine, cannabis, heroin) that can result in altered cognition.
- Increased disease activity within 8 weeks defined by an increase in SLEDAI by 3 points or more, exclusive of points from serologies.
- Any increase in steroid dose or addition of disease modifying agents within 8 weeks.
- Exceeding the weight limit on the MRI scanner.
- Suffering from claustrophobia.
- Have any of the following: cardiac pacemakers, auto defibrillators, neural stimulators, aneurysm clips, metallic prostheses, cochlear implants, any implanted devices (pumps, infusion devices, stents), permanent eye make-up, IUD's, shrapnel injuries.
- Current use of anxiolytic, antidepressant or antipsychotic medications.
- Pregnant and/or lactating women
- A glomerular filtration rate less than ≤60 mL/min or any evidence of active renal disease from any cause that would put the subject at risk for increased toxicity from gadolinium contrast for the MRI study.
- The presence of uncontrolled or severe hypertension, diabetes mellitus or liver disease that would increase the risk of increased toxicity from gadolinium contrast.
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
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Healthy control
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SLE
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
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Changes in brain activity
Time Frame: hippocampal metabolism from baseline over the 2 years
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hippocampal metabolism from baseline over the 2 years
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Secondary Outcome Measures
Outcome Measure |
Time Frame |
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Use of PET ligand CNS 5161 tracer as an assessment and imaging biomarker for regional brain dysfunction
Time Frame: Specific activity of CNS5161, determined by the UV absorbance of the radioactive peak as compared with a standard curve of CNS5161 from baseline over the 2 years
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Specific activity of CNS5161, determined by the UV absorbance of the radioactive peak as compared with a standard curve of CNS5161 from baseline over the 2 years
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Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Cardiovascular Diseases
- Vascular Diseases
- Cerebrovascular Disorders
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Infections
- Immune System Diseases
- Autoimmune Diseases of the Nervous System
- Autoimmune Diseases
- Connective Tissue Diseases
- Central Nervous System Viral Diseases
- Central Nervous System Infections
- Vasculitis
- Vasculitis, Central Nervous System
- Meningoencephalitis
- Encephalitis
- Meningitis
- Lupus Erythematosus, Systemic
- Lupus Vasculitis, Central Nervous System
Other Study ID Numbers
- PET CNS5161
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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