Wednesday, November 25, 2015

Nature Neuroscience Contents: December 2015 Volume 18 Number 12, pp 1699 - 1862

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TABLE OF CONTENTS

December 2015 Volume 18, Issue 12

News and Views
Commentary
Review
Brief Communications
Articles
Resources
Technical Reports
Corrigenda
Errata
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News and Views

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Transcriptional architecture of the human brain   pp1699 - 1701
Kevin W Kelley and Michael C Oldham
doi:10.1038/nn.4178
The largest survey of gene expression ever performed in the adult human brain reveals highly stereotyped transcriptional patterning across individuals. The most stably patterned genes are enriched for neuronal annotations, disease associations, drug targets and correspond to resting state functional networks.

See also: Commentary by Akbarian et al. | Resource by Hawrylycz et al.

Does the hippocampus preplay memories?   pp1701 - 1702
Howard Eichenbaum
doi:10.1038/nn.4180
Previous studies have reported 'preplay' of hippocampal neural activity patterns associated with events yet to occur. Silva et al. challenge this finding on the basis of large-scale recordings before and after experiences.

See also: Article by Silva et al.

Thalamus controls recurrent cortical dynamics   pp1703 - 1704
Jose Manuel Alonso and Harvey A Swadlow
doi:10.1038/nn.4175
Previous work has suggested that cortical recurrent circuits can self-sustain their activity without thalamic input. A study now demonstrates that this is not the case in the awake brain, which tightly locks cortical timing to thalamic activity.

See also: Article by Reinhold et al.

Backward reasoning the formation rules   pp1705 - 1706
Walter Senn and João Sacramento
doi:10.1038/nn.4172
Synaptic plasticity during learning is as fundamental as it is hard to study. The underlying synaptic plasticity rule has now been inferred using only the firing rate statistics of visual neurons in monkeys before and after learning.

See also: Article by Lim et al.

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Commentary

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The PsychENCODE project   pp1707 - 1712
Schahram Akbarian, Chunyu Liu, James A Knowles, Flora M Vaccarino, Peggy J Farnham et al.
doi:10.1038/nn.4156
Recent research on disparate psychiatric disorders has implicated rare variants in genes involved in global gene regulation and chromatin modification, as well as many common variants located primarily in regulatory regions of the genome. Understanding precisely how these variants contribute to disease will require a deeper appreciation for the mechanisms of gene regulation in the developing and adult human brain. The PsychENCODE project aims to produce a public resource of multidimensional genomic data using tissue- and cell type-specific samples from approximately 1,000 phenotypically well-characterized, high-quality healthy and disease-affected human post-mortem brains, as well as functionally characterize disease-associated regulatory elements and variants in model systems. We are beginning with a focus on autism spectrum disorder, bipolar disorder and schizophrenia, and expect that this knowledge will apply to a wide variety of psychiatric disorders. This paper outlines the motivation and design of PsychENCODE.

See also: Resource by Hawrylycz et al. | News and Views by Kelley & Oldham

Review

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Dendritic integration: 60 years of progress   pp1713 - 1721
Greg J Stuart and Nelson Spruston
doi:10.1038/nn.4157
Neurons receive synaptic input primarily onto their dendrites. This review focuses on how synaptic inputs are integrated by dendrites, with an emphasis on recent work in the intact brain. It describes the range of computations dendrites perform on their inputs, highlighting their critical role in information processing in the brain.

Brief Communications

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Latent tri-lineage potential of adult hippocampal neural stem cells revealed by Nf1 inactivation   pp1722 - 1724
Gerald J Sun, Yi Zhou, Shiori Ito, Michael A Bonaguidi, Genevieve Stein-O'Brien et al.
doi:10.1038/nn.4159
Endogenous neural stem cells in the adult hippocampus are generally considered to be bi-potent. The authors show in mouse that inactivation of neurofibromin 1 (Nf1), a gene that is mutated in neurofibromatosis type 1, unlocks a latent oligodendrocyte lineage potential of neural stem cells to produce all three lineages in vivo.

Decreased amyloid-β and increased neuronal hyperactivity by immunotherapy in Alzheimer's models   pp1725 - 1727
Marc Aurel Busche, Christine Grienberger, Aylin D Keskin, Beomjong Song, Ulf Neumann et al.
doi:10.1038/nn.4163
Immunotherapy with antibodies targeting the amyloid-β peptide has yet to show any cognitive benefit in Alzheimer's disease patients in clinical trials. In vivo two-photon imaging in mouse models of Alzheimer's disease now reveals that these antibodies do not alleviate neuronal dysfunction and can even worsen it.

Sensory uncertainty decoded from visual cortex predicts behavior   pp1728 - 1730
Ruben S van Bergen, Wei Ji Ma, Michael S Pratte and Janneke F M Jehee
doi:10.1038/nn.4150
Using functional MRI and a novel model-based analysis, the authors find that the uncertainty in sensory representations can reliably be estimated from trial-by-trial activity in human visual cortex. Moreover, this uncertainty represented in cortical activity affects the way people make decisions.

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Articles

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Mutations in NONO lead to syndromic intellectual disability and inhibitory synaptic defects   pp1731 - 1736
Dennis Mircsof, Maéva Langouët, Marlène Rio, Sébastien Moutton, Karine Siquier-Pernet et al.
doi:10.1038/nn.4169
Via exome sequencing, the authors identified mutations in the NONO protein, a member of the DBHS family, as a likely cause of severe intellectual disability. Using animal and cell models, they found that nearly one-third of NONO-regulated transcripts were synaptosomal and that NONO depletion directly affected inhibitory synaptic structure.

GDF10 is a signal for axonal sprouting and functional recovery after stroke   pp1737 - 1745
Songlin Li, Esther H Nie, Yuqin Yin, Larry I Benowitz, Spencer Tung et al.
doi:10.1038/nn.4146
Stroke is the leading cause of adult disability. This study shows that the secreted factor GDF10 is a signal for the formation of new brain connections that lead to recovery after stroke and can be manipulated to enhance recovery and movement control in this disease.

G9a is essential for epigenetic silencing of K+ channel genes in acute-to-chronic pain transition   pp1746 - 1755
Geoffroy Laumet, Judit Garriga, Shao-Rui Chen, Yuhao Zhang, De-Pei Li et al.
doi:10.1038/nn.4165
Chronic neuropathic pain is associated with K+ channel downregulation in primary sensory neurons. The authors show that G9a, a histone-modifying enzyme, is required for transcriptional repression of K+ channel-associated gene families caused by nerve injury. G9a in primary sensory neurons is a key epigenetic regulator involved in acute-to-chronic pain transition.

Piezo2 is the principal mechanotransduction channel for proprioception   pp1756 - 1762
Seung-Hyun Woo, Viktor Lukacs, Joriene C de Nooij, Dasha Zaytseva, Connor R Criddle et al.
doi:10.1038/nn.4162
Proprioception, the sense of body and limb position, begins in nerve cells called proprioceptors that are activated by muscle or joint stretch. The molecular mechanism of mechanotransduction in mammalian proprioceptors is unknown. The authors show that the mechanically activated cation channel Piezo2 is the principal mechanotransducer in murine proprioceptors.

Midbrain dopamine neurons bidirectionally regulate CA3-CA1 synaptic drive   pp1763 - 1771
Zev B Rosen, Stephanie Cheung and Steven A Siegelbaum
doi:10.1038/nn.4152
Optogenetic release of dopamine from midbrain inputs to the hippocampus produces a powerful bidirectional control over hippocampal information flow to CA1 pyramidal neurons that depends on the pattern of stimulation. In this manner, a switch in the state of dopaminergic activity may serve to select specific events for memory storage.

Trajectory events across hippocampal place cells require previous experience   pp1772 - 1779
Delia Silva, Ting Feng and David J Foster
doi:10.1038/nn.4151
Hippocampal place cells are active offline in 'replay' sequences reflecting speeded-up depictions of behavioral trajectories, suggesting a model of memory. The authors show that encoding of replay sequences requires behavioral experience and the activation of molecular mechanisms of synaptic plasticity, while retrieval does not.

See also: News and Views by Eichenbaum

Neuronal activity is not required for the initial formation and maturation of visual selectivity   pp1780 - 1788
Kenta M Hagihara, Tomonari Murakami, Takashi Yoshida, Yoshiaki Tagawa and Kenichi Ohki
doi:10.1038/nn.4155
Orientation selectivity is a key property of neurons in the primary visual cortex. Using genetic silencing of cortical neurons throughout development, this study shows that initial formation of orientation selectivity is independent of neuronal activity. The initial selectivity is subsequently modified and this later process depends on spontaneous neuronal activity.

Distinct recurrent versus afferent dynamics in cortical visual processing   pp1789 - 1797
Kimberly Reinhold, Anthony D Lien and Massimo Scanziani
doi:10.1038/nn.4153
By optogenetically silencing thalamus, the authors show that visual cortex does not sustain a response without thalamus for more than a few tens of milliseconds. This rapid cortical activity decay predicts the temporal dynamics of sensory activity transmission between thalamus and cortex in awake animals, whereas under anesthesia, the fidelity of thalamo-cortical connection is dominated by the effect of synaptic depression.

See also: News and Views by Alonso & Swadlow

Climbing fibers encode a temporal-difference prediction error during cerebellar learning in mice   pp1798 - 1803
Shogo Ohmae and Javier F Medina
doi:10.1038/nn.4167
To learn, the brain must be able to tell when it has made a mistake. A new study by Ohmae and Medina reveals the neural algorithm responsible for encoding error signals during cerebellar learning. A replica of this algorithm was previously found in dopamine neurons, suggesting the same elemental mechanism.

Inferring learning rules from distributions of firing rates in cortical neurons   pp1804 - 1810
Sukbin Lim, Jillian L McKee, Luke Woloszyn, Yali Amit, David J Freedman et al.
doi:10.1038/nn.4158
Experience-dependent synaptic modifications are one of the fundamental mechanisms of learning and memory, yet they are difficult to measure in vivo. Here the authors introduce a network model-based method that infers synaptic plasticity rules from the analysis of the statistics of neuronal responses to novel versus familiar stimuli.

See also: News and Views by Senn & Sacramento

The neuronal basis of fear generalization in humans   pp1811 - 1818
Selim Onat and Christian Büchel
doi:10.1038/nn.4166
Generalizing from past events to novel situations is common in animals. To have an adaptive value, this ability requires flexible control, especially in fearful situations. The authors demonstrate that fear generalization can be broken down to neural mechanisms involved separately in the detection of threat and its uncertainty.

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Resources

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Cell type- and brain region-resolved mouse brain proteome   pp1819 - 1831
Kirti Sharma, Sebastian Schmitt, Caroline G Bergner, Stefka Tyanova, Nirmal Kannaiyan et al.
doi:10.1038/nn.4160
The authors performed a comprehensive proteome analysis of the adult mouse brain, its major regions and CNS cell types at a depth of >13,000 proteins. This new resource represents the largest collection of cell type-resolved protein expression data of the brain. The power of the data set was illustrated by identifying novel adhesion molecules in glia and neuron interaction.

Canonical genetic signatures of the adult human brain   pp1832 - 1844
Michael Hawrylycz, Jeremy A Miller, Vilas Menon, David Feng, Tim Dolbeare et al.
doi:10.1038/nn.4171
The authors applied a correlation-based metric, 'differential stability' (DS), to assess reproducibility of gene expression patterning across individual brains, revealing mesoscale genetic organization. The highest DS genes were enriched for brain-related biological annotations, disease associations and drug targets, and their anatomical expression pattern correlated with resting state functional connectivity.

See also: Commentary by Akbarian et al. | News and Views by Kelley & Oldham

Technical Reports

Top

Optogenetic acidification of synaptic vesicles and lysosomes   pp1845 - 1852
Benjamin R Rost, Franziska Schneider, M Katharina Grauel, Christian Wozny, Claudia G Bentz et al.
doi:10.1038/nn.4161
The authors developed two subcellular optogenetic tools, pHoenix and lyso-pHoenix, that allow light-driven acidification of synaptic vesicles and lysosomes, respectively. pHoenix was used to control the degree of neurotransmitter uptake into synaptic vesicles, revealing that exocytosis of partially filled vesicles is less efficient than the release of completely filled vesicles.

Parcellating cortical functional networks in individuals   pp1853 - 1860
Danhong Wang, Randy L Buckner, Michael D Fox, Daphne J Holt, Avram J Holmes et al.
doi:10.1038/nn.4164
A cortical parcellation technique accurately maps functional organization in individual brains. Functional networks mapped by this approach are highly reproducible and effectively capture individual variability. The algorithm performs well across different populations and data types and is validated by invasive cortical stimulation mapping in surgical patients.

Corrigenda

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Corrigendum: Parthanatos mediates AIMP2-activated age-dependent dopaminergic neuronal loss   p1861
Yunjong Lee, Senthilkumar S Karuppagounder, Joo-Ho Shin, Yun-Il Lee, Han Seok Ko et al.
doi:10.1038/nn1215-1861a

Corrigendum: Psychiatric genome-wide association study analyses implicate neuronal, immune and histone pathways   p1861
The Network and Pathway Analysis Subgroup of the Psychiatric Genomics Consortium: 
doi:10.1038/nn1215-1861c

Corrigendum: The dorsal posterior insula subserves a fundamental role in human pain   p1861
Andrew R Segerdahl, Melvin Mezue, Thomas W Okell, John T Farrar and Irene Tracey
doi:10.1038/nn1215-1861d

Corrigendum: Regulating anxiety with extrasynaptic inhibition   p1862
Paolo Botta, Lynda Demmou, Yu Kasugai, Milica Markovic, Chun Xu et al.
doi:10.1038/nn1215-1862a

Errata

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Erratum: Hippocampal-neocortical functional reorganization underlies children's cognitive development   p1861
Shaozheng Qin, Soohyun Cho, Tianwen Chen, Miriam Rosenberg-Lee, David C Geary et al.
doi:10.1038/nn1215-1861b

Erratum: Optogenetics and the future of neuroscience   p1862
Edward S Boyden
doi:10.1038/nn1215-1862b

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