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. 1965 Sep 1;26(3):779–795. doi: 10.1083/jcb.26.3.779

THE FINE STRUCTURE OF LIPOFUSCIN AGE PIGMENT IN THE NERVOUS SYSTEM OF AGED MICE

T Samorajski 1, J M Ordy 1, J R Keefe 1
PMCID: PMC2106797  PMID: 19866680

Abstract

An examination of the topographic distribution of lipofuscin pigment granules with the light and electron microscope revealed either smaller and randomly "dispersed" or larger and more complex "clustered" pigment configurations in the cytoplasm of neurons in the dorsal ganglia and ventral spinal cord of 24-month old male mice. Qualitative comparisons revealed no major differences in shape, size, complexity, density, orientation, and cytologic distribution of the pigment bodies in motor and sensory neurons. In general, when the pigment granules were quite numerous within the 2 types of cells, they were smaller in size (∼lµ), had a dense homogeneous matrix with few bands or lamellae, and were uniformly distributed throughout the cytoplasm. In contrast, when the pigment configurations were less in number, they were usually larger in size (∼3µ), had a more complex internal banded structure, and appeared more localized within the cell. Examination of the bands revealed a repeating pattern of ∼70 A. The bands appeared to fuse, forming hexagonal arrays of linear densities intersecting at an angle of approximately 120° in some regions of the pigment bodies. Structural similarities suggested that the striated membranous bands may be composed of phospholipids.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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