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Neurology 2002;58:362-367
© 2002 American Academy of Neurology

Insomnia associated with thalamic involvement in E200K Creutzfeldt–Jakob disease

A. L. Taratuto, MD PhD;, P. Piccardo, MD, E. G. Reich, MD, S. G. Chen, PhD, G. Sevlever, MD PhD;, M. Schultz, HT, A. A. Luzzi, MD, M. Rugiero, MD, G. Abecasis, MD, M. Endelman, MD, A. M. Garcia, MD, S. Capellari, MD, Z. Xie, BM, E. Lugaresi, MD, P. Gambetti, MD, S. R. Dlouhy, PhD and B. Ghetti, MD

From the Institute for Neurological Research (Drs. Taratuto, Sevlever, and Garcia, and M. Schultz) and J. Mendez Hospital (Drs. Reich, Luzzi, Rugiero, Abecasis, and Endelman), Buenos Aires, Argentina; Indiana University School of Medicine (Drs. Piccardo, Dlouhy, and Ghetti), Indianapolis; Case Western Reserve University (Drs. Chen, Capellari, and Gambetti, and Z. Xie), Cleveland, OH; and University of Bologna (Dr. Lugaresi), Italy.

Address correspondence and reprint requests to Dr. Ana Lia Taratuto, Montañeses 2325–(1428) Buenos Aires, Argentina; e-mail: ataratuto{at}fleni.org.ar

Background: Insomnia with predominant thalamic involvement and minor cortical and cerebellar pathologic changes is not characteristic of familial Creutzfeldt–Jakob disease (CJD) but is a hallmark of fatal familial insomnia.

Objective: To report a 53-year-old woman with intractable insomnia as her initial symptom of disease.

Methods: The authors characterized clinical, pathologic, and molecular features of the disease using EEG, polysomnography, neurohistology, Western blotting, protein sequencing, and prion protein (PrP) gene (PRNP) analysis.

Results: The patient developed dysgraphia, dysarthria, bulimia, myoclonus, memory loss, visual hallucinations, and opisthotonos, as well as pyramidal, extrapyramidal, and cerebellar signs. Polysomnographic studies showed an absence of stages 3 and 4, and REM. She died 8 months after onset. On neuropathologic examination, there was major thalamic involvement characterized by neuronal loss, spongiform changes, and prominent gliosis. The inferior olivary nuclei exhibited chromatolysis, neuronal loss, and gliosis. Spongiform changes were mild in the neocortex and not evident in the cerebellum. PrP immunopositivity was present in these areas as well as in the thalamus. PRNP analysis showed the haplotype E200K-129M. Western blot analysis showed the presence of proteinase K (PK)–resistant PrP (PrPsc) with the nonglycosylated isoform of approximately 21 kd, corresponding in size to that of type 1 PrPsc. N-terminal protein sequencing demonstrated PK cleavage sites at glycine (G) 82 and G78, as previously reported in CJD with the E200K-129 M haplotype.

Conclusions: Insomnia may be a prominent early symptom in cases of CJD linked to the E200K-129M haplotype in which the thalamus is severely affected.




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