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American Journal of Pathology, Vol 152, 391-398, Copyright © 1998 by American Society for Investigative Pathology

REGULAR ARTICLES

Fatal encephalopathy with astrocyte inclusions in GFAP transgenic mice

A Messing, MW Head, K Galles, EJ Galbreath, JE Goldman and M Brenner
Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 53706, USA. amessing@svm.vetmed.wisc.edu

Increased expression of glial fibrillary acidic protein (GFAP) is a hallmark of gliosis, the astrocytic hypertrophy that occurs during a wide variety of diseases of the central nervous system. To determine whether this increase in GFAP expression per se alters astrocyte function, we generated transgenic mice that carry copies of the human GFAP gene driven by its own promoter. Astrocytes of these mice are hypertrophic, up-regulate small heat-shock proteins, and contain inclusion bodies identical histologically and antigenically to the Rosenthal fibers of Alexander's disease. Mice in the highest expressing lines die by the second postnatal week. The results support the notion that Alexander's disease is a disorder of astrocytes, and provide an animal model for studying the causes and consequences of inclusion body disease.

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