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Age-related changes of structures in cerebellar cortex of cat

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Abstract

We studied the structures of the cerebellar cortex of young adult and old cats for age-related changes, which were statistically analysed. Nissl staining was used to visualize the cortical neurons. The immunohistochemical method was used to display glial fibrillary acidic protein (GFAP)-immunoreactive (IR) astrocytes and neurofilament-immunoreactive (NF-IR) neurons. Under the microscope, the thickness of the cerebellar cortex was measured; and the density of neurons in all the layers as well as that of GFAP-IR cells in the granular layer was analysed. Compared with young adult cats, the thickness of the molecular layer and total cerebellar cortex was significantly decreased in old cats, and that of the granular layer increased. The density of neurons in each layer was significantly lower in old cats than in young adult ones. Astrocytes in old cats were significantly denser than in young adult ones, and accompanied by evident hypertrophy of the cell bodies and enhanced immunoreaction of GFAP substance. Purkinje cells (PCs) in old cats showed much fewer NF-IR dendrites than those in young adults. The above findings indicate a loss of neurons and decrease in the number of dendrites of the PCs in the aged cerebellar cortex, which might underlie the functional decline of afferent efficacy and information integration in the senescent cerebellum. An age-dependent enhancement of activity of the astrocytes may exert a protective effect on neurons in the aged cerebellum

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Abbreviations

ANOVA:

analysis of variance

CNS:

central nervous system

DAB:

diaminobenzidine

GFAP:

glial fibrillary acidicprotein

GFAP-IR:

GFAP-immunoreactive

NF-IR:

neurofilament-immunoreactive

PBS:

phosphate buffer saline

PC:

Purkinje cell

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Authors and Affiliations

  1. College of Life Sciences, Anhui Normal University, 241000, Wuhu, People's Republic of China

    Changzheng Zhang, Tianmiao Hua, Zaiman Zhu & Xun Luo

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  1. Changzheng Zhang
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  2. Tianmiao Hua
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  3. Zaiman Zhu
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  4. Xun Luo
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Correspondence to Tianmiao Hua.

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Zhang, C., Hua, T., Zhu, Z. et al. Age-related changes of structures in cerebellar cortex of cat. J. Biosci. 31, 55–60 (2006). https://doi.org/10.1007/BF02705235

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  • DOI: https://doi.org/10.1007/BF02705235

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