BRIEF TITLE * (in English and Sufficiently Descriptive) Role of MRI in Anti-LGI1 Encephalitis (LGI1-IRM)

April 20, 2023 updated by: Hospices Civils de Lyon

Investigating the Prognostic Role of Brain MRI in Anti-LGI1 Encephalitis

The term "autoimmune encephalitis" denotes an heterogenous group of diseases commonly associated with autoantibodies targeting neural or glial antigens. Patients harboring antibodies against the leucine-rich glioma-inactivated protein 1 (LGI1) usually respond well to immunotherapy, but a significant percentage develop cognitive sequelae and disability nonetheless. These patients would likely benefit for more aggressive and prolonged immunotherapy, aiming to prevent permanent neurological deficits. Identifying features predicting poor outcome would be crucial to guide treatment decisions. Brain magnetic resonance imaging is a key diagnostic tool in the acute phase, but radiological changes may also appear in follow-up studies, including global brain atrophy, hippocampal atrophy and mesial temporal sclerosis. We hypothesize that specific changes identifiable in the acute and chronic phase underlie a higher risk of poor outcome and persistent neurological deficits.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

50

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • France
      • Lyon, France, 69677
        • Centre de référence des syndromes neurologiques paranéoplasiques et encéphalites autoimmunes

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

N/A

Sampling Method

Non-Probability Sample

Study Population

Patients will be included from the from the database of the French Reference Centre for Paraneoplastic Neurological Syndromes and Autoimmune Encephalitis (Lyon, France)

Description

Inclusion Criteria:

  • - Patients with a definite diagnosis of LGI1-antibody-associated encephalitis
  • available MRI records
  • Ascertained positivity for LGI1-antibodies in serum and/or CSF

Exclusion Criteria:

  • - Positivity for another antibody against neural or glial antigens
  • MRI images not available
  • Not enough clinical data to ascertain outcome

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
LGI1- Patients
Patients affected by autoimmune encephalitis with antibodies against LGI1
Other: Retrospective evaluation of specific brain MRI features

Initial brain MRI and subsequent follow-up studies will be reviewed to document the presence of specific MRI features, and their association with greater disease severity in the acute phase and/or neurological sequelae after encephalitis resolution will be investigated. More specifically, we will analyze the presence of:

  • Brain MRI changes in the acute stage, i.e. < 3 months from symptoms onset, including abnormal signal intensity, altered diffusion and/or contrast enhancement in the hippocampus (unilateral/bilateral), abnormal signal intensity in basal ganglia, insula, and/or perisylvian cortex, presence of global brain atrophy, presence of hippocampal atrophy and/or MTS, hippocampal volumetry
  • Brain MRI changes after acute phase resolution (> 6 months after symptoms onset) including abnormal signal intensity in the hippocampus (unilateral/bilateral), presence of global brain atrophy, presence of hippocampal atrophy and/or MTS, hippocampal volumetry

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Cognitive dysfunction and disability
Time Frame: 12 months
Main outcome measures will include cognitive dysfunction measured by appropriate neuropsychological evaluations, and psychiatric symptoms; it will be "none", "light", "moderate", "severe"
12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Hospices Civils de Lyon

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 20, 2022

Primary Completion (Actual)

September 20, 2022

Study Completion (Actual)

December 20, 2022

Study Registration Dates

First Submitted

February 14, 2023

First Submitted That Met QC Criteria

April 20, 2023

First Posted (Actual)

April 24, 2023

Study Record Updates

Last Update Posted (Actual)

April 24, 2023

Last Update Submitted That Met QC Criteria

April 20, 2023

Last Verified

April 1, 2023

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 22-5017

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

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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