Axonal Membran-Skeletal Prtein A60 - Association with a Brain Spectrin-Binding Activity and Entry into Cerebellar Axons at a Stage After the Initiation of Axonal Growth

Hayes, Nandini V. L. and Baines, Anthony J. (1994) Axonal Membran-Skeletal Prtein A60 - Association with a Brain Spectrin-Binding Activity and Entry into Cerebellar Axons at a Stage After the Initiation of Axonal Growth. Journal of Neurochemistry, 62 (1). pp. 300-306. ISSN 0022-3042. (The full text of this publication is not available from this repository)

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Abstract

A60 is a 60-kDa component of the axonal cortical cytoskeleton in CNS neurones. It appears to be neurone specific and is tightly bound to brain membranes. In this study the cytoskeletal activities and developmental expression of A60 in rat cerebellum have been examined using the monoclonal antibody DR1. A60 in a partially purified soluble extract of brain membranes interacts selectively with brain but not erythrocyte spectrin. Because erythrocyte spectrin is more closely related to the dendritic form of spectrin than the axonal form, this raises the possibility that A60 localises in axons by interaction with the axonal form of spectrin only. A60 is not found in rat cerebellum before the day of birth. However, during postnatal development of the cerebellum (days 1-13) DR1 reactivity appears progressively. On postnatal day 1, a small population of cells in the mantle layer (presumptive Purkinje cells) is DR1 positive. There is no DR1 reactivity found in Purkinje cell axons during their initial phase of growth. By postnatal day 7, Purkinje cell bodies, initial dendritic segments, and the cerebellar white matter are all positive. This pattern of labelling is strengthened up until postnatal day 13. By contrast, in adult rat cerebellum, the location of A60 has changed so that it is most concentrated in axons, and dendritic staining is lost. These data indicate that A60 is a spectrin-binding component of the adult axonal membrane skeleton, the presence of which is only required in axons after the initial phase of growth.

Item Type: Article
Uncontrolled keywords: CYTOSKELETON; FODRIN; NEURONAL DEVELOPMENT; CEREBELLUM
Subjects: Q Science > QP Physiology (Living systems) > QP517 Biochemistry
Divisions: Faculties > Science Technology and Medical Studies > School of Biosciences
Depositing User: P. Ogbuji
Date Deposited: 26 Jun 2009 07:18
Last Modified: 17 Apr 2014 13:06
Resource URI: http://kar.kent.ac.uk/id/eprint/20244 (The current URI for this page, for reference purposes)
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