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Distance is not everything in imaging genomics of functional networks: reply to a commentary on Correlated gene expression supports synchronous activity in brain networks

Jonas Richiardi, View ORCID ProfileAndre Altmann, Michael Greicius
doi: https://doi.org/10.1101/132746
Jonas Richiardi
1Laboratory for Neurology and Imaging of Cognition, Dept. of Fundamental Neurosciences, University of Geneva
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Andre Altmann
2Translational Imaging Group, Dept of Medical Physics & Biomedical Engineering, University College London
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Michael Greicius
3Functional Imaging in Neuropsychiatric Disorders Laboratory, Dept. of Neurology, Stanford University
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Abstract

Our 2015 paper (Richiardi et al., 2015), showed that transcriptional similarity of gene expression level is higher than expected by chance within functional brain networks (defined by functional magnetic resonance imaging), a relationship that is driven by around 140 genes. These results were replicated in vivo in adolescents, where we showed that SNPs of these genes where associated above chance with in-vivo fMRI connectivity, and in the mouse, where mouse orthologs of our genes showed above-chance association with meso-scale axonal connectivity. This paper has received a commentary on biorXiv (Pantazatos and Li, 2016), making several claims about our results and methods, mainly pointing out that Euclidean distance explains our results (“…high within-network SF is entirely attributable to proximity and is unrelated to functional brain networks…”). Here we address these claims and their weaknesses, and show that our original results stand, contrary to the claims made in the commentary.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted May 01, 2017.
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Distance is not everything in imaging genomics of functional networks: reply to a commentary on Correlated gene expression supports synchronous activity in brain networks
Jonas Richiardi, Andre Altmann, Michael Greicius
bioRxiv 132746; doi: https://doi.org/10.1101/132746
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Distance is not everything in imaging genomics of functional networks: reply to a commentary on Correlated gene expression supports synchronous activity in brain networks
Jonas Richiardi, Andre Altmann, Michael Greicius
bioRxiv 132746; doi: https://doi.org/10.1101/132746

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