Intercellular tight junctions are responsible for blood-brain barrier integrity.
Is it true that Intercellular tight junctions are responsible for blood-brain barrier integrity?
Yes. Intercellular tight junctions are critical structural components that restrict paracellular flux and maintain the integrity of the blood-brain barrier. Multiple studies demonstrate that alterations or degradation of these tight junctions directly lead to increased barrier permeability.
Verdict: SUPPORTED · 7 sources for, 0 against · Last checked
The retrieved literature overwhelmingly confirms that intercellular tight junctions, composed of proteins like claudins and ZO-1, form the seals between brain endothelial cells that are responsible for blood-brain barrier integrity. Pathological breakdown or pharmacological modulation of these junctions consistently correlates with changes in barrier permeability.
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Beard, R. S., Reynolds, J. J., & Bearden, S. E. (2011). Hyperhomocysteinemia increases permeability of the blood-brain barrier by NMDA receptor-dependent regulation of adherens and tight junctions. doi.org. https://doi.org/10.1182/blood-2011-02-338269
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Maine, X. d. & Gu, C. (2025). Canonical Wnt Signaling Suppresses Brain Endothelial Cell Transcytosis to Maintain Blood-Brain Barrier Integrity. doi.org. https://doi.org/10.1101/2025.03.10.642437
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M, Z., X, H., L, Y., & W, W. (2026). Brain endothelial homeostasis in psychiatric disorders: mechanisms, evidence, and translational opportunities.. doi.org. https://doi.org/10.3389/fncel.2026.1901256
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A, B., M, T., G, A., A, P., AD, F., A, A., V, C., L, M., & F, B. (2026). Controlled Blood-Brain Barrier Modulation by a High-Affinity Claudin-5 Peptide Binder. doi.org. https://doi.org/10.64898/2026.09.12.751133
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H, A., RL, W., M, M., CA, S., C, C., G, S., DA, S., C, P., JH, H., & B, T. (2026). Caspase-3 dependent, induction of barrier dysfunction and hyperpermeability in blood-brain barrier endothelial cells.. doi.org. https://doi.org/10.1080/02699052.2026.2733592
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JH, M. (2026). Cell-to-Cell Signaling Networks at the Blood-Brain Barrier in Health and Disease.. doi.org. https://doi.org/10.1161/atvbaha.126.324590
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SD, W., X, W., YM, Z., B, H., KY, W., CJ, Y., HY, Z., H, L., XC, W., HP, W., AF, C., ZS, Z., CJ, Y., & XY, Z. (2026). Setmelanotide alleviates diabetes-associated cognitive impairment by interrupting the binding of ICAM-1 and JIP1 in endothelial cells of the blood-brain barrier.. doi.org. https://doi.org/10.1016/j.metabol.2026.156712
What does the evidence say?
The retrieved literature overwhelmingly confirms that intercellular tight junctions, composed of proteins like claudins and ZO-1, form the seals between brain endothelial cells that are responsible for blood-brain barrier integrity. Pathological breakdown or pharmacological modulation of these junctions consistently correlates with changes in barrier permeability.
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