pp60c-src in the developing cerebellum.

Abstract:

:pp60c-src was localized in the cerebellum of developing chicken embryos by immunoperoxidase staining with antisera raised against bacterially expressed pp60v-src. Immunoreactivity (IR) appeared in the cerebellum of the chicken embryos at the time of neuronal differentiation. pp60c-src IR was detected in regions of the developing cerebellum where processes of developing neurons and glia are located. In the early embryo (stage 17), pp60c-src IR was localized in the marginal zone of the cerebellar plate. By stage 40, pp60c-src IR was localized in the process-rich molecular layer of the cerebellum and between the cells of the developing internal granular layer. Cell bodies of cerebellar neurons did not show pp60c-src IR at any stage of development. Mitotically active neuroepithelial cells of the metencephalon did not express pp60c-src before the onset of differentiation in the early embryo, nor did proliferating cells of the external granular layer express pp60c-src at later stages. Although it is not possible to ascertain whether pp60c-src is localized in developing neurons or glia at the light microscope level, the time of its appearance and pattern of distribution in the molecular layer is suggestive of a localization within the developing neuronal processes which compose the bulk of this layer. Biochemical analyses of pp60c-src in the developing cerebellum by the immune complex protein kinase activity and sensitivity of the kinase to inhibition by P1,P4-di(adenosine-5')tetraphosphate confirmed that the expression of pp60c-src coincided with the time of neuronal differentiation. We conclude from these results that in the central nervous systems, pp60c-src may be more important in an aspect of cell differentiation or a mature neuronal function than in the proliferation of neuronal or glial precursors.

journal_name

Mol Cell Biol

authors

Fults DW,Towle AC,Lauder JM,Maness PF

doi

10.1128/mcb.5.1.27

subject

Has Abstract

pub_date

1985-01-01 00:00:00

pages

27-32

issue

1

eissn

0270-7306

issn

1098-5549

journal_volume

5

pub_type

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