4.4 Article

alpha-synuclein is expressed in different tissues during human fetal development

Journal

JOURNAL OF MOLECULAR NEUROSCIENCE
Volume 22, Issue 3, Pages 199-203

Publisher

HUMANA PRESS INC
DOI: 10.1385/JMN:22:3:199

Keywords

alpha-synuclein; human development; fetal tissues

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alpha-Synuclein is a small presynaptic protein associated with both normal synaptic plasticity and neurodegenerative processes. Its normal cellular function, however, remains unknown. Even though it is highly enriched in the brain, its presence was reported in other human adult tissues. In the present study, we examined tissue expression of alpha-synuclein in human and rat prenatal development. Using Western blot analysis, various peripheral tissues from 15 to 23 gestational weeks, human and E19 rat fetuses, along with human and rat adult tissues, were assayed. alpha-Synuclein expression was observed in all fetal human organs examined. In adult human tissues the high expression of alpha-synuclein was maintained in the brain, whereas in other organs the expression was greatly reduced. In contrast, both in fetal and adult rat tissues, alpha-synuclein was only detected in the brain. In addition to a 19-kDa alpha-synuclein band, 36- and 52-kDa immunoreactive bands were observed in all fetal and adult human organs, with the exception of the brain, but their identity remains to be determined. These findings suggest that apart from its function in development of the nervous system, alpha-synuclein has an important function in peripheral tissues as well during normal human prenatal development.

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