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Comparative Genomics of the BDNF Gene, Non-Canonical Modes of Transcriptional Regulation, and Neurological Disease

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Abstract

Alternative splicing of genes in the central nervous system is ubiquitous and utilizes many different mechanisms. Splicing generates unique transcript or protein isoforms of the primary gene that result in shortened, lengthened, or reorganized products that may have distinct functions from the parent gene. Learning and memory genes respond selectively to a variety of environmental stimuli and have evolved a number of complex mechanisms for transcriptional regulation to act rapidly and flexibly to environmental demands. Their patterns of expression, however, are incompletely understood. Many activity-inducible genes generate transcripts by alternative splicing that have an unknown physiological or behavioral function. One such gene codes for the protein brain-derived neurotrophic factor (BDNF). BDNF is a neurotrophin whose expression is essential for cellular growth, synaptogenesis, and synaptic plasticity. It is an important model gene because of its complex structure and the variety of transcriptional mechanisms it displays for expression in response to external stimuli. Some of these are unexpected, or non-canonical, transcriptional control mechanisms that require further exploration in an activity-dependent context. In this review, a comparative genomics approach is taken to highlight the different forms of BDNF gene transcription including potential autoregulatory mechanisms. Modes of BDNF control have general implications for understanding the origins of several neurological disorders that are associated with reduced BDNF function.

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Acknowledgements

I thank Cliff H. Summers for his valuable comments on the manuscript.

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This study is supported by the Neuroscience Medical Research Fund (USD), and internal departmental funds were given to JK.

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  1. Neuroscience Group, Division of Basic Biomedical Sciences, University of South Dakota Sanford School of Medicine, 414 E. Clark St., Vermillion, SD, 57069, USA

    Joyce Keifer

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Keifer, J. Comparative Genomics of the BDNF Gene, Non-Canonical Modes of Transcriptional Regulation, and Neurological Disease. Mol Neurobiol 58, 2851–2861 (2021). https://doi.org/10.1007/s12035-021-02306-z

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