ORCID
- Barros, Claudia: 0000-0003-0361-0333
Abstract
Neuregulin 1 (NRG1) is a secreted trophic factor that activates the postsynaptic erbB4 receptor tyrosine kinase. Both NRG1 and erbB4 have been repeatedly associated with schizophrenia, but their downstream targets are not well characterized. ErbB4 is highly abundant in interneurons, and NRG1-mediated erbB4 activation has been shown to modulate interneuron function, but the role for NRG1-erbB4 signaling in regulating interneuron dendritic growth is not well understood. Here we show that NRG1/erbB4 promote the growth of dendrites in mature interneurons through kalirin, a major dendritic Rac1-GEF. Recent studies have shown associations of the KALRN gene with schizophrenia. Our data point to an essential role of phosphorylation in kalirin-7's C terminus as the critical site for these effects. As reduced interneuron dendrite length occurs in schizophrenia, understanding how NRG1-erbB4 signaling modulates interneuron dendritic morphogenesis might shed light on disease-related alterations in cortical circuits.
DOI
10.1038/mp.2011.35
Publication Date
2012-01-01
Publication Title
Mol Psychiatry
Volume
17
Issue
1
Organisational Unit
Peninsula Medical School
Keywords
Analysis of Variance, Animals, Brain, Cells, Cultured, Dendrites, Disks Large Homolog 4 Protein, Green Fluorescent Proteins, Guanine Nucleotide Exchange Factors, Guanylate Kinases, Humans, Immunoprecipitation, Interneurons, Membrane Proteins, Mice, Knockout, Mutation, Neuregulin-1, Phosphorylation, Proto-Oncogene Proteins c-fyn, RNA, Small Interfering, Receptor, ErbB-2, Signal Transduction, Transfection, Tyrosine, rac1 GTP-Binding Protein
First Page
1
Last Page
107
Recommended Citation
Cahill, M. E., Jones, K., Rafalovich, I., Xie, Z., Barros, C., Müller, U., & Penzes, P. (2012) 'Control of interneuron dendritic growth through NRG1/erbB4-mediated kalirin-7 disinhibition.', Mol Psychiatry, 17(1), pp. 1-107. Available at: https://doi.org/10.1038/mp.2011.35
