Related Experiment Video
Updated: Jan 25, 2026
Evaluation of Blood-Brain Barrier Breakdown in a Mouse Model of Mild Traumatic Brain Injury
Published on: October 18, 2024
IL-17A is associated with the breakdown of the blood-brain barrier in relapsing-remitting multiple sclerosis
A Francesca Setiadi1, Alexander R Abbas1, Surinder Jeet1
1Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
Abstract:
IL-17 has been implicated in the pathogenesis of multiple sclerosis (MS). Here, we show that blockade of IL-17A, but not IL-17F, attenuated experimental autoimmune encephalomyelitis (EAE). We further show that IL-17A levels were elevated in the CSF of relapsing-remitting MS (RRMS) patients and that they correlated with the CSF/serum albumin quotient (Qalb), a measure of blood-brain barrier (BBB) dysfunction. We then demonstrated that the combination of IL-17A and IL-6 reduced the expression of tight junction (TJ)-associated genes and disrupted monolayer integrity in the BBB cell line hCMEC/D3. However, unlike IL-17A, IL-6 in the CSF from RRMS patients did not correlate with Qalb. These data highlight the potential importance of targeting IL-17A in preserving BBB integrity in RRMS.
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