The Effects of Normal Aging on Regional Accumulation of Hyaluronan and Chondroitin Sulfate Proteoglycans in the Mouse Brain

The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society
May J ReedRobert B Vernon

Abstract

The brain changes in volume and composition with normal aging. Cellular components of the brain are supported by an extracellular matrix (ECM) comprised largely of hyaluronan (HA) and HA-associated members of the lectican family of chondroitin sulfate proteoglycans (CSPGs). We examined regional differences in microvascular density, neuronal and glial markers, and accumulation of HA and CSPGs in mouse brains during normal aging. The cortex, hippocampus, dentate gyrus, and cerebellum of young (4 months), middle-aged (14 months), and aged (24-26 months) brains were analyzed. Microvascular density decreased in cerebral cortex and cerebellum with age. There were no detectable differences in neuronal density. There was an increase in astrocytes in the hippocampus with aging. HA accumulation was higher in aged brain relative to young brain in the cerebral cortex and cerebellum, but not in other regions examined. In contrast, CSPGs did not change with aging in any of the brain regions examined. HA and CSPGs colocalized with a subset of neuronal cell bodies and astrocytes, and at the microvasculature. Differences in accumulation of ECM in the aging brain, in the setting of decreased microvascular density and/or increased glial activatio...Continue Reading

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Citations

Dec 7, 2018·Journal of Alzheimer's Disease : JAD·May J ReedC Dirk Keene
May 2, 2020·The European Journal of Neuroscience·Chloe M HallGraham K Sheridan
Apr 10, 2020·Frontiers in Cell and Developmental Biology·Theresa C Sutherland, Cédric G Geoffroy
Aug 23, 2020·International Journal of Molecular Sciences·Alec Peters, Larry S Sherman
Oct 7, 2020·Scientific Reports·Emily WilsonKaren Newell-Litwa
Jun 4, 2020·Ageing Research Reviews·Sophie VanhunselLieve Moons
Mar 4, 2021·Reviews in the Neurosciences·Jia-Zhe LinWei-Jiang Zhao
Oct 12, 2021·Ageing Research Reviews·Frances Tolibzoda ZakusiloVera Gorbunova

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