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Start Over Author "Yu-Wei, Hua" Publisher wiley
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7. Lost Polarization of Aquaporin4 and Dystroglycan in the Core Lesion after Traumatic Brain Injury Suggests Functional Divergence in Evolution.

Author

Liu H, Qiu Gp, Zhuo F, Yu Wh, Sun Sq, Li Fh, and Yang M

Subjects
Animals, Aquaporin 4 genetics, Astrocytes metabolism, Astrocytes pathology, Blood-Brain Barrier, Brain pathology, Brain Edema pathology, Brain Injuries metabolism, Brain Injuries pathology, Dystroglycans genetics, Gene Expression Regulation, Humans, Rats, Water chemistry, Aquaporin 4 biosynthesis, Brain metabolism, Brain Edema genetics, Brain Injuries genetics, Dystroglycans biosynthesis
Abstract

Objective: To understand how aquaporin4 (AQP4) and dystroglycan (DG) polarized distribution change and their roles in brain edema formation after traumatic brain injury (TBI)., Methods: Brain water content, Evans blue detection, real-time PCR, western blot, and immunofluorescence were used., Results: At an early stage of TBI, AQP4 and DG maintained vessel-like pattern in perivascular endfeet; M1, M23, and M1/M23 were increased in the core lesion. At a later stage of TBI, DG expression was lost in perivascular area, accompanied with similar but delayed change of AQP4 expression; expression of M1, M23, and DG and the ratio of M1/M2 were increased., Conclusion: At an early stage, AQP4 and DG maintained the polarized distribution. Upregulated M1 and M23 could retard the cytotoxic edema formation. At a later stage AQP4 and DG polarized expression were lost from perivascular endfeet and induced the worst cytotoxic brain edema. The alteration of DG expression could regulate that of AQP4 expression after TBI.

Published
2015
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