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Shigeru Araga, MD; Hiroshi Kagimoto, MD; Koji Funamoto, MD; Akiko Adachi, MD; Kazuhiko Inoue, MD; Kazuro Takahashi, MD
Division of Neurology Institute of Neurological Sciences Tottori University School of Medicine 86 Nishimachi Yonago 683, Japan

Arch Neurol. 1990;47(4):380-381.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.

—In Alzheimer's disease, several cellular alterations have been reported, not only about the central nervous system, but also about the non-neuronal tissues, including altered membrane fluidity of platelets¹ and decreased adhesiveness of fibroblasts.² Since the gene for amyloid precursor protein has been reported to be located on chromosome 21,^3,4 recent studies indicate that the abnormalities of Alzheimer's disease are not restricted to the brain. Patients with trisomy of chromosome 21 (Down's syndrome), who exhibit characteristics similar to Alzheimer's changes in the brain, have been reported as having abnormal natural killer cell activity.⁵ This seems to be a plausible explanation for the increased frequency of infection and leukemia.

To our knowledge, natural killer cell activity has never been described in Alzheimer's disease.

Subjects and Methods.

—Fifty-seven patients (9 men and 48 women; mean age; 78.5 years old) with dementia of the Alzheimer type (DAT) . . . [Full Text PDF of this Article]

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