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| | | | | | Specials - Outlook: Physical sciences take on cancer | | | | | | Despite a huge worldwide cancer research effort, the rates of surviving many forms of the disease have barely changed. Now, intensified collaborations between oncologists and physical scientists are bringing fresh perspectives to that effort. Interdisciplinary teams are starting to bear fruit in the form of mathematical and computer models, nanomedicine and high-tech diagnostics. ▼ more | | | | | | | | | | | | | | Albedo and atmospheric constraints of dwarf planet Makemake from a stellar occultation | | Makemake is thought to be the third largest dwarf planet in our Solar System, a little smaller than Pluto and Eris, but until now its size and albedo were known only approximately. Now an opportunity has arisen for a much closer look at Makemake, as it passed between us and a distant star. The resulting spectroscopic data confirm that Makemake is smaller than Pluto and Eris, and the occultation light curves rule out the presence of global Pluto-like atmosphere on Makemake. | | | | | | | | | | | | | | An early and enduring advanced technology originating 71,000 years ago in South Africa | | An advanced stone-tool technology has been discovered at Pinnacle Point in South Africa, dating back to around 70,000 years ago. Previously discovered signs of such activity have been a more flickering presence, seeming to appear and disappear, but these tools seem to have persisted for more than 10,000 years. The technology is dominated by heat-treated stone bladelets suitable for use as components of composite tools and advanced projectile weapons. The authors speculate that weapons made using such bladelets may have been pivotal to the success of modern humans as they left Africa and encountered Neanderthals. | | | | | | | | | | | | Aberrant light directly impairs mood and learning through melanopsin-expressing neurons | | Disruption of the body's circadian clock by exposure to irregular light cycles can affect sleep-wake patterns and cause sleep deprivation, which are often associated with mood alterations and cognitive disruptions. This study in mice shows that irregular light schedules can directly affect mood and cognitive function, independent of sleep and circadian rhythms. The aberrant light effects are dependent on melanopsin-containing retinal ganglion cells, and administration of antidepressant drugs restores learning ability, suggesting that the depressive effect precedes learning impairment. | | | | | | | | | | | | | | | | In this week's podcast: dry spells spell bad news for forests, brain cells whisper to their neighbours, and DNA gets a new alphabet. | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | Nature's sexism ▶ | | | | The editors of this publication need to improve how we reflect women's contributions to science. For this, we must inject an extra loop into our thinking. | | | | | | | | | | | | Too much to ask ▶ | | | | A market-based malaria-control programme may not be perfect, but it deserves to continue. | | | | | | | | | | | | Water wars ▶ | | | | Environmental protections must not wait until a population is about to disappear. | | | | | | | | | | | | | | | | How resilient is your country? ▶ | | | | Extreme events are on the rise. Governments must implement national and integrated risk-management strategies, says Erwann Michel-Kerjan. | | | | | | | | | | | | | | | | Seven days: 16–22 November 2012 ▶ | | | | The news in brief: World Bank warning on climate change; NIH moves to enforce open-access policy; and BP receives record fine for Deepwater Horizon spill. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | Experimental & Molecular Medicine (EMM) Co-published with NPG from 2013! In January 2013, Nature Publishing Group will co-publish Experimental & Molecular Medicine (EMM), an official journal of the Korean Society for Biochemistry and Molecular Biology (KSBMB). EMM seeks to highlight the improved clinical benefits for human health from experimental and translational research performed using specific molecular tools. Discover more about EMM | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Autism-related deficits via dysregulated eIF4E-dependent translational control ▶ | | | | Christos G. Gkogkas, Arkady Khoutorsky, Israeli Ran, Emmanouil Rampakakis, Tatiana Nevarko et al. | | | | Mice lacking 4E-BP2, an eIF4E repressor, display increased translation of neuroligins; the mice also show autism-related behaviours and alterations in hippocampal synaptic activity, and these are reversed by normalization of eIF4E activity or neuroligin 1 levels. | | | | | | | | | | | | | | | | Convergent acoustic field of view in echolocating bats ▶ | | | | Lasse Jakobsen, John M. Ratcliffe & Annemarie Surlykk | | | | Studying six vespertilionid bat species of different sizes to investigate the reason why smaller bats have higher frequency echolocation calls, a model is put forward that the size/frequency range is modulated by the need to maintain a focused, highly directional echolocation beam. | | | | | | | | | | | | | | | | Global convergence in the vulnerability of forests to drought ▶ | | | | Brendan Choat, Steven Jansen, Tim J. Brodribb, Hervé Cochard, Sylvain Delzon, Radika Bhaskar et al. | | | | Analysis of data from forest plants worldwide shows that margins between threshold xylem pressures at which plants suffer damage and the lowest xylem pressures experienced are small, with no difference between dry and wet forests, providing insight into why drought-induced forest decline is occurring in both arid and wet forests. | | | | | | | | | | | | Non-synaptic inhibition between grouped neurons in an olfactory circuit ▶ | | | | Chih-Ying Su, Karen Menuz, Johannes Reisert & John R. Carlson | | | | Olfactory receptor neurons of fruitflies are shown to communicate with one another through ephaptic interactions with significant impact on olfactory behaviour; the results indicate that ephaptic effects may be more widespread than previously appreciated. | | | | | | | | | | | | An alternative route to cyclic terpenes by reductive cyclization in iridoid biosynthesis ▶ | | | | Fernando Geu-Flores, Nathaniel H. Sherden, Vincent Courdavault, Vincent Burlat, Weslee S. Glenn et al. | | | | Iridoids are a large family of bicyclic natural products that possess anticancer, anti-inflammatory, antifungal and antibacterial activities; here the essential cyclization step in their biosynthesis is identified, opening up the possibility of production of naturally occurring and synthetic variants of iridoids for use in pharmacy or agriculture. | | | | | | | | | | | | A prefrontal cortex–brainstem neuronal projection that controls response to behavioural challenge ▶ | | | | Melissa R. Warden, Aslihan Selimbeyoglu, Julie J. Mirzabekov, Maisie Lo, Kimberly R. Thompson et al. | | | | High-speed tracking of effortful responses and neuronal activity in rats during a forced swim test identifies medial prefrontal cortex (mPFC) neurons that respond during escape-related swimming but not normal locomotion, and optogenetics shows that mPFC neurons projecting to the brainstem dorsal raphe nucleus, which is implicated in depression, modulate this behavioural response to challenge | | | | | | | | | | | | Fucose sensing regulates bacterial intestinal colonization ▶ | | | | Alline R. Pacheco, Meredith M. Curtis, Jennifer M. Ritchie, Diana Munera, Matthew K. Waldor et al. | | | | FusKR, a fucose-sensing two-component system, has been identified in enterohaemorrhagic E. coli, linking fucose utilization and virulence factor gene expression and providing insight into how sensing of a host signal can facilitate bacterial colonization. | | | | | | | | | | | | | | | | Flickering gives early warning signals of a critical transition to a eutrophic lake state ▶ | | | | Rong Wang, John A. Dearing, Peter G. Langdon, Enlou Zhang, Xiangdong Yang, Vasilis Dakos et al. | | | | Critical transitions in experimental and theoretical systems can be anticipated on the basis of specific warning signs, with ‘critical slowing down’ being the best studied; long-term data from a real system, a Chinese lake, now show that a flickering phenomenon can be observed up to 20 years before the critical transition to a eutrophic state. | | | | | | | | | | | | DNA-repair scaffolds dampen checkpoint signalling by counteracting the adaptor Rad9 ▶ | | | | Patrice Y. Ohouo, Francisco M. Bastos de Oliveira, Yi Liu, Chu Jian Ma & Marcus B. Smolka | | | | DNA damage or replication stress induces the activation of checkpoint kinases, pausing the cell cycle so that DNA repair can take place; checkpoint activation must be regulated to prevent the cell-cycle arrest from persisting after damage is repaired, and now the Slx4–Rtt107 complex is shown to regulate checkpoint kinase activity by directly monitoring DNA-damage signalling. | | | | | | | | | | | | | | | | Zero-valent sulphur is a key intermediate in marine methane oxidation ▶ | | | | Jana Milucka, Timothy G. Ferdelman, Lubos Polerecky, Daniela Franzke, Gunter Wegener et al. | | | | Methane oxidation under anaerobic conditions coupled to sulphate reduction is thought to be carried out by a consortium of methanotrophic archaea (ANME) and sulphate-reducing Deltaproteobacteria; here it is shown that ANME alone can mediate the reaction and that the associated bacteria perform disulphide disproportionation, a new microbial sulphur transformation. | | | | | | | | | | | | Hippocampal–cortical interaction during periods of subcortical silence ▶ | | | | N. K. Logothetis, O. Eschenko, Y. Murayama, M. Augath, T. Steudel et al. | | | | Simultaneous electrophysiological recordings in hippocampus and neural-activity-triggered whole-brain imaging in the monkey show that most of the cerebral cortex is activated during the fast hippocampal oscillations (ripples), whereas most diencephalic, midbrain and brainstem regions are inhibited; this may function to optimize information transfer from hippocampus to cortex during off-line memory consolidation. | | | | | | | | | | | | | | | | DAXX envelops a histone H3.3–H4 dimer for H3.3-specific recognition ▶ | | | | Simon J. Elsässer, Hongda Huang, Peter W. Lewis, Jason W. Chin, C. David Allis et al. | | | | The crystal structures of the histone chaperone DAXX histone-binding domain bound to a histone H3.3–H4 dimer are described; DAXX wraps around the H3.3–H4 dimer and alters its conformation. | | | | | | | | | | | | An early and enduring advanced technology originating 71,000 years ago in South Africa ▶ | | | | Kyle S. Brown, Curtis W. Marean, Zenobia Jacobs, Benjamin J. Schoville, Simen Oestmo et al. | | | | This study shows that a highly advanced stone tool technology (microlithic) appears earlier than originally thought; this microlithic technology persisted over a vast time span (~11,000 years), and was part of an even longer-lived (>100,000 years) advanced technology of complex heat treatment. | | | | | | | | | | | | | | | | | | | | Progressive degeneration of human neural stem cells caused by pathogenic LRRK2 ▶ | | | | Guang-Hui Liu, Jing Qu, Keiichiro Suzuki, Emmanuel Nivet, Mo Li et al. | | | | Investigation of neural cells from post-mortem human brains and differentiated from patient-derived induced pluripotent stem cells shows that the LRRK2 mutation (G2019S) associated with familial and sporadic Parkinson's disease correlates with abnormalities at the nuclear envelope. | | | | | | | | | | | | Mitochondrial Atpif1 regulates haem synthesis in developing erythroblasts ▶ | | | | Dhvanit I. Shah, Naoko Takahashi-Makise, Jeffrey D. Cooney, Liangtao Li, Iman J. Schultz et al. | | | | Atpif1, a mitochondrial ATPase inhibitor, was identified as a zebrafish anemic mutant, pinotage, providing an important link in our understanding of the relationship between mitochondrial homeostasis and haem synthesis and identifying a gene that may have a role in human iron, haem and mitochondrial diseases. | | | | | | | | | | | | BTB-ZF factors recruit the E3 ligase cullin 3 to regulate lymphoid effector programs ▶ | | | | Rebecca Mathew, Michael P. Seiler, Seth T. Scanlon, Ai-ping Mao, Michael G. Constantinides et al. | | | | The E3 ubiquitin ligase cullin 3 is shown to bind BTB-zinc finger transcription factors to direct the ubiquitination of nuclear chromatin-associated factors to control transcription and cell-fate decisions in B- and T-cell populations. | | | | | | | | | | | | Structure and mechanism of a bacterial sodium-dependent dicarboxylate transporter ▶ | | | | Romina Mancusso, G. Glenn Gregorio, Qun Liu & Da-Neng Wang | | | | The cytosolic concentration of citrate partially depends on its direct import across the plasma membrane by the Na+-dependent citrate transporter (NaCT); here the X-ray crystal structure of a bacterial homologue of NaCT is reported, which, along with transport-activity studies, suggests how specific conformational changes facilitate substrate translocation across the cellular membrane. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | nature.com webcasts Macmillan Science Communication, Exclusive partner of Nature Publishing Group, Publisher of Nature and Scientific American presented a custom webcast in September 2012 on: The Power of Flow Cytometry in Microbiology Applications Register and watch the webcast online Free online www.nature.com/webcasts Sponsored by: BD Biosciences | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Autism-related deficits via dysregulated eIF4E-dependent translational control ▶ | | | | Christos G. Gkogkas, Arkady Khoutorsky, Israeli Ran, Emmanouil Rampakakis, Tatiana Nevarko et al. | | | | Mice lacking 4E-BP2, an eIF4E repressor, display increased translation of neuroligins; the mice also show autism-related behaviours and alterations in hippocampal synaptic activity, and these are reversed by normalization of eIF4E activity or neuroligin 1 levels. | | | | | | | | | | | | DNA-repair scaffolds dampen checkpoint signalling by counteracting the adaptor Rad9 ▶ | | | | Patrice Y. Ohouo, Francisco M. Bastos de Oliveira, Yi Liu, Chu Jian Ma & Marcus B. Smolka | | | | DNA damage or replication stress induces the activation of checkpoint kinases, pausing the cell cycle so that DNA repair can take place; checkpoint activation must be regulated to prevent the cell-cycle arrest from persisting after damage is repaired, and now the Slx4–Rtt107 complex is shown to regulate checkpoint kinase activity by directly monitoring DNA-damage signalling. | | | | | | | | | | | | | | | | DAXX envelops a histone H3.3–H4 dimer for H3.3-specific recognition ▶ | | | | Simon J. Elsässer, Hongda Huang, Peter W. Lewis, Jason W. Chin, C. David Allis et al. | | | | The crystal structures of the histone chaperone DAXX histone-binding domain bound to a histone H3.3–H4 dimer are described; DAXX wraps around the H3.3–H4 dimer and alters its conformation. | | | | | | | | | | | | | | | | Water structural transformation at molecular hydrophobic interfaces ▶ | | | | Joel G. Davis, Kamil P. Gierszal, Ping Wang & Dor Ben-Amotz | | | | Spectroscopic measurements now reveal that at low temperatures, the water in hydrophobic hydration shells has greater tetrahedral order and fewer weak hydrogen bonds than the surrounding bulk water; this structure disappears at higher temperatures and around alcohol chains longer than 1 nanometre. | | | | | | | | | | | | Structure and mechanism of a bacterial sodium-dependent dicarboxylate transporter ▶ | | | | Romina Mancusso, G. Glenn Gregorio, Qun Liu & Da-Neng Wang | | | | The cytosolic concentration of citrate partially depends on its direct import across the plasma membrane by the Na+-dependent citrate transporter (NaCT); here the X-ray crystal structure of a bacterial homologue of NaCT is reported, which, along with transport-activity studies, suggests how specific conformational changes facilitate substrate translocation across the cellular membrane. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Sisyphus cooling of electrically trapped polyatomic molecules ▶ | | | | Martin Zeppenfeld, Barbara G. U. Englert, Rosa Glöckner, Alexander Prehn, Manuel Mielenz et al. | | | | A general method of cooling polyatomic molecules to ultracold temperatures is reported; the optoelectrical cooling technique removes kinetic energy via a Sisyphus effect, effectively causing the molecules to continually ‘climb’ a hill of potential energy. | | | | | | | | | | | | Revealing the quantum regime in tunnelling plasmonics ▶ | | | | Kevin J. Savage, Matthew M. Hawkeye, Rubén Esteban, Andrei G. Borisov, Javier Aizpurua & Jeremy J. Baumberg | | | | Two gold nanostructures with controllable subnanometre separation are used to follow the evolution of plasmonic modes; the distance at which quantum tunnelling sets in is determined, and a quantum limit for plasmonic field confinement is estimated. | | | | | | | | | | | | | | | | Lower satellite-gravimetry estimates of Antarctic sea-level contribution ▶ | | | | Matt A. King, Rory J. Bingham, Phil Moore, Pippa L. Whitehouse, Michael J. Bentley et al. | | | | A new model of glacial isostatic adjustment used in conjunction with GRACE satellite data suggests that ice loss from Antarctica is contributing 0.19 millimetres per year to global mean sea level, which is substantially less than previous GRACE-based estimates. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lower satellite-gravimetry estimates of Antarctic sea-level contribution ▶ | | | | Matt A. King, Rory J. Bingham, Phil Moore, Pippa L. Whitehouse, Michael J. Bentley et al. | | | | A new model of glacial isostatic adjustment used in conjunction with GRACE satellite data suggests that ice loss from Antarctica is contributing 0.19 millimetres per year to global mean sea level, which is substantially less than previous GRACE-based estimates. | | | | | | | | | | | | Accelerated disassembly of IgE–receptor complexes by a disruptive macromolecular inhibitor ▶ | | | | Beomkyu Kim, Alexander Eggel, Svetlana S. Tarchevskaya, Monique Vogel, Heino Prinz et al. | | | | The interaction between IgE and its receptor FcεRI underlies many allergic responses; here the structure and mechanism of a newly engineered DARPin inhibitor is presented, revealing that it not only blocks the receptor–ligand interaction but also dissociates already-formed complexes. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Oncology: Getting physical ▶ | | | | Physics, maths and evolutionary biology are among the scientific disciplines providing cancer research with fresh perspective and therapeutic approaches. | | | | | | | | | | | | Megadata: The odd couple ▶ | | | | An unlikely duo is trying to make sense of the avalanche of data that confronts cancer scientists, pointing the way towards a new era of research. | | | | | | | | | | | | | | | | Mechanics: The forces of cancer ▶ | | | | The way cells physically interact with each other and their environment could help researchers understand the invasion and metastasis of solid tumours. | | | | | | | | | | | | Nanotechnology: Carrying drugs ▶ | | | | Traditional chemotherapies can be toxic but nano-sized carriers can keep them out of healthy tissue and take old drugs to new places. | | | | | | | | | | | | Perspective: Meeting of minds ▶ | | | | David Agus and Murray Gell-Mann show that the élites of physics and medicine can spur each other to fresh insights. | | | | | | | | | | | | Modelling: Computing cancer ▶ | | | | Software models of complex tissues and disease are yielding a better understanding of cancer and suggesting potential treatments. | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | 98 days from submission to publication* Scientific Reports is an open access journal publishing technically sound research across all areas of the natural sciences. Submit your next research to Scientific Reports *mean time for papers published in September 2012 | | | | | | | | | | |
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| | | | | | | | | | | | | | | | Academia: Off the tenured track ▶ | | | | The desires to pursue personal goals, escape university pressures or get off the grant-writing treadmill convince some US professors to leave the security of a tenured post. | | | | | | | | | | | | | | | | | | | | | | | | Careers related news & comment | | | | | | | | | | | | | | | |
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