Journals of Gerontology Series A: Biological Sciences and Medical Sciences Large Type Edition
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Journals of Gerontology Series A: Biological Sciences and Medical Sciences, Vol 53, Issue 1 B49-B51, Copyright © 1998 by The Gerontological Society of America

JOURNAL ARTICLE

Advanced glycosylation end products in adrenal lipofuscin

I Shimokawa, Y Higami, S Horiuchi, M Iwasaki and T Ikeda
Department of Pathology, Nagasaki University School of Medicine, Japan. [email protected]

The present study examined the presence of advanced glycosylation end products (AGEs) in lipofuscin present in the brain and adrenal gland of aging rats by immunohistochemistry using antibodies raised against AGEs. Lipofuscin identified as yellow to brown granules emitting bright yellow to orange autofluorescence with ultraviolet light were detected in cortical neurons, cerebellar Purkinje cells, and adrenal cells in the inner part of the zona reticularis. However, none of the antibodies visualized lipofuscin in these areas. The outer part of the zona reticularis contained yellow granules emitting a faint orange autofluorescence. These granules were immunostained by an antibody that reacted with AGEs structures unrelated to the carboxymethyllysine moiety. Newly formed adrenal cortical cells are thought to migrate from the outer layer to the inner layer of the zona reticularis. Therefore, our results suggest that glycosylation-related processes are involved in lipofuscinogenesis, at least in its early stage, in the adrenal zona reticularis.


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F. Schutt, M. Bergmann, F. G. Holz, and J. Kopitz
Proteins Modified by Malondialdehyde, 4-Hydroxynonenal, or Advanced Glycation End Products in Lipofuscin of Human Retinal Pigment Epithelium
Invest. Ophthalmol. Vis. Sci., August 1, 2003; 44(8): 3663 - 3668.
[Abstract] [Full Text] [PDF]


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