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| | | Specials - Outlook: Medical Research Masterclass | | | | This year's Lindau Nobel Laureate Meeting provided some 600 young scientists with the opportunity to spend a week mingling with their scientific heroes on the German island of Lindau. This week's Nature publishes highlights from the proceedings, including an analysis of the part played by autophagy in conditions such as cancer and Alzheimer's disease and discussions – also on Nature Video at www.nature.com/lindau/2014 – between young researchers and laureates on the science and ethics of ageing. ▼ more | | | | | | | | | Rb suppresses human cone-precursor-derived retinoblastoma tumours | The cellular origins of most human cancers are unknown. This study identifies the cone precursor cells of the retina as cell-of-origin for the childhood tumour retinoblastoma. arise. These cells are uniquely sensitive to transformation upon loss of the Rb gene. Knowledge of the cell of origin for retinoblastoma, often used as a model for cancers in general, may help in the development of better methods of diagnosis, early detection and chemoprevention. | | | | | | | | | Lithium–antimony–lead liquid metal battery for grid–level energy storage | The integration of batteries into the electric grid is seen as a means of regulating energy supply from intermittent sources such as wind or solar, but today's battery technologies are too expensive for the job. An all-liquid battery, comprising a liquid negative electrode, a molten salt electrolyte and a liquid positive electrode, is one of the technologies being investigated for this role. Here Kangli Wang and colleagues describe a new variant of the concept – an all-liquid Li||Sb-Pb battery – that reduces operating temperatures and hence potential cost while retaining the desirable performance characteristics. | | | | | | | | | | | | | | | | | High winter ozone pollution from carbonyl photolysis in an oil and gas basin | The US experience with air quality degradation from shale gas extraction presents a case study of relevance to developments in other regions projected for the near future. High ozone mixing ratios have been observed in oil and gas producing basins during winter, but the underlying chemistry involved is not fully understood. This study uses data from an oil and gas basin in Utah and a chemical 'box model' simulation to show that very high volatile organic carbon concentrations optimize the ozone production efficiency of nitrogen oxides with carbonyl photolysis as a dominant oxidant source. | | | | | | | | | In this week's podcast: This week, natural gas may not ease carbon dioxide levels, research subject mash-ups, and watching Alzheimer's unfold in a mini 3D brain. | | | | | | |
| | | | | | | | | | | | | | | | | Universities challenged ▶ | | | The accelerating pace of change in today’s world means that universities must modify how they fulfil their function of seeking and sharing knowledge. | | | | | | | | Dust to dust ▶ | | | What lessons can be learned from the presentation of the gravitational-waves story? | | | | | | | | Review rewards ▶ | | | Welcome efforts are being made to recognize academics who give up their time to peer review. | | | | | | | | | | | How terror-proof is your economy? ▶ | | | Scientists can help to develop a financial safety net by providing transparent market data and loss-impact analysis, says Erwann Michel-Kerjan. | | | | | | | | | | | Seven days: 10–16 October 2014 ▶ | | | The week in science: Disaster strikes Taiwanese research vessel, UK launches its first space-weather forecasting centre, and ancient Greek shipwreck yields more treasures. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ebola: learn from the past ▶ | | | Drawing on his experiences in previous outbreaks, David L. Heymann calls for rapid diagnosis, patient isolation, community engagement and clinical trials. | | | | | | | | | | | | | | Books in brief ▶ | | | Barbara Kiser reviews five of the week's best science picks. | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | | | | | | | | | | | | | | | | | | | Mesenchymal–endothelial transition contributes to cardiac neovascularization ▶ | | | Eric Ubil, Jinzhu Duan, Indulekha C. L. Pillai et al. | | | This study shows that cardiac injury induces cardiac fibroblasts to undergo mesenchymal–endothelial transition and acquire an endothelial-cell like fate, a process mediated, in part, by a p53-dependent mechanism — use of a small molecule activator of p53 increases mesenchymal–endothelial transition, leading to reduced scarring and better preservation of heart function. | | | | | | | | Centriole amplification by mother and daughter centrioles differs in multiciliated cells ▶ | | | Adel Al Jord, Anne-Iris Lemaître, Nathalie Delgehyr et al. | | | Using advanced microscopy techniques, the process of centriole amplification in multiciliated cells is explored, and the daughter centriole identified as the primary nucleation site of more than 90% of the new centrioles, contesting existing de novo theories of centriolar amplification and highlighting a new centrosome asymmetry. | | | | | | | | Structure of an integral membrane sterol reductase from Methylomicrobium alcaliphilum ▶ | | | Xiaochun Li, Rita Roberti, Günter Blobel | | | Solving the X-ray crystal structure of a Δ14-sterol reductase and homologue of human C14SR and DHCR7, two enzymes that reduce specific carbon–carbon double bonds in the cholesterol biosynthetic pathway, may provide insight into how specific mutations in DHCR7 and lamin B receptor lead to human diseases. | | | | | | | | | | | | | | T–B-cell entanglement and ICOSL-driven feed-forward regulation of germinal centre reaction ▶ | | | Dan Liu, Heping Xu, Changming Shih et al. | | | Interactions between T and B cells in the germinal centre are brief but involve extensive cell-surface contact in an entangled mode; ICOSL promotes T–B entanglement and B-cell acquisition of CD40L, which drives B cells to upregulate ICOSL, thus forming an intercellular feed-forward loop that is required for efficient positive selection and development of the bone marrow plasma cell compartment. | | | | | | | | Primate-specific endogenous retrovirus-driven transcription defines naive-like stem cells ▶ | | | Jichang Wang, Gangcai Xie, Manvendra Singh et al. | | | An extensive analysis of HERVH (a primate-specific endogenous retrovirus) expression in human pluripotent stem cells is presented, identifying a sub-population of cells within cultured human embryonic stem cells and induced pluripotent stem cells that has characteristics of naive-state cells — the study provides evidence for a new primate-specific transcriptional circuitry regulating pluripotency. | | | | | | | | Origins of major archaeal clades correspond to gene acquisitions from bacteria ▶ | | | Shijulal Nelson-Sathi, Filipa L. Sousa, Mayo Roettger et al. | | | A comparison of protein-coding genes from 134 archaeal genomes with their homologues in 1,847 bacterial genomes reveals that, during evolution, genes are transferred more often from bacteria to archaea than vice versa, and that gene influxes from bacteria can bring about the origin of major archaeal groups. | | | | | | | | Adenosine activates brown adipose tissue and recruits beige adipocytes via A2A receptors ▶ | | | Thorsten Gnad, Saskia Scheibler, Ivar von Kügelgen et al. | | | Cold exposure activates brown adipose tissue (BAT) through the sympathetic nervous system, and previous studies have reported inhibitory effects of the purinergic transmitter adenosine in BAT from hamster or rat; here adenosine/A2A signalling is shown to be involved in sympathetic activation of human and murine brown adipocytes to allow protection of mice from diet-induced obesity. | | | | | | | | Cohesin-dependent globules and heterochromatin shape 3D genome architecture in S. pombe ▶ | | | Takeshi Mizuguchi, Geoffrey Fudenberg, Sameet Mehta et al. | | | Genome-wide chromatin conformation capture (Hi-C) is used to investigate three-dimensional genome organization in Schizosaccharomyces pombe; small domains of chromatin interact locally on chromosome arms to form globules, which depend on cohesin but not heterochromatin for formation, and heterochromatin at centromeres and telomeres provides crucial structural constraints to shape genome architecture. | | | | | | | | Selection for niche differentiation in plant communities increases biodiversity effects ▶ | | | Debra Zuppinger-Dingley, Bernhard Schmid, Jana S. Petermann et al. | | | Here, new ecological communities are established using plants from mixed-species communities or monocultures; ecosystem functioning and morphological trait diversity are shown to be greater in plants from mixed-species communities, suggesting that biodiversity effects in natural communities strengthen over time. | | | | | | | | | | | The genetics of monarch butterfly migration and warning colouration ▶ | | | Shuai Zhan, Wei Zhang, Kristjan Niitepõld et al. | | | The monarch butterfly, well known for its spectacular annual migration across North America, is shown by genome sequencing of monarchs from around the world to have been ancestrally migratory and to have dispersed out of North America to occupy its current broad distribution; the authors also discovered signatures of selection associated with migration within loci implicated in flight muscle function, leading to greater flight efficiency. | | | | | | | | Clonal dynamics of native haematopoiesis ▶ | | | Jianlong Sun, Azucena Ramos, Brad Chapman et al. | | | On the basis of transplantation experiments it is generally believed that a very small number of haematopoietic stem cells maintain multi-lineage haematopoiesis by stably producing a hierarchy of short-lived progenitor cells; here a new transposon-based labelling technique shows that this might not be the case during non-transplant haematopoiesis, but rather that a large number of long-lived progenitors are the main drivers of steady-state haematopoiesis during most of adulthood. | | | | | | | | Structural mechanism of glutamate receptor activation and desensitization ▶ | | | Joel R. Meyerson, Janesh Kumar, Sagar Chittori et al. | | | Cryo-electron microscopy is used to visualize the AMPA receptor GluA2 and the kainate receptor GluK2 in several functional states — having access to so many different structural states has enabled the authors to propose a molecular model for the gating cycle of glutamate receptors. | | | | | | | | Site-specific group selection drives locally adapted group compositions ▶ | | | Jonathan N. Pruitt, Charles J. Goodnight | | | Here, colonies of social spiders are used to investigate the evolution of a group-level trait, the ratio of individuals with the ‘docile’ versus ‘aggressive’ phenotype in a colony; experimental colonies were generated with varying ratios and established in the wild, revealing group-level selection. | | | | | | | | Hallucigenia’s onychophoran-like claws and the case for Tactopoda ▶ | | | Martin R. Smith, Javier Ortega-Hernández | | | The claws of the Cambrian lobopodian Hallucigenia resemble the claws and jaws of extant onychophorans, establishing a close relationship between hallucigeniid lobopodians and onychophorans, resolving tardigrades as the closest extant relatives of true arthropods, and showing that the earliest ancestor of the arthropods and their kin would have looked like a lobopodian. | | | | | | | | OSCA1 mediates osmotic-stress-evoked Ca2+ increases vital for osmosensing in Arabidopsis ▶ | | | Fang Yuan, Huimin Yang, Yan Xue et al. | | | Osmotic stress is known to induce a transient increase in cytoplasmic Ca2+ concentration [Ca2+]i in plants, and now OSCA1 is identified as a long-sought Ca2+ channel that mediates [Ca2+]i increases—mutants lacking OSCA1 function have impaired osmotic Ca2+ signalling in guard cells and root cells, and reduced transpiration regulation and root growth under osmotic stress. | | | | | | | | | | | | | | CRISPR-mediated direct mutation of cancer genes in the mouse liver ▶ | | | Wen Xue, Sidi Chen, Hao Yin et al. | | | CRISPR plasmids targeting Pten and p53, alone and in combination, are delivered by hydrodynamic injection to the liver; the CRISPR-mediated mutations phenocopy the effects of deletions using Cre–LoxP technology, allowing the direct mutation of tumour suppressor genes and oncogenes in the liver using the CRISPR/Cas system, which presents a new approach for rapid development of liver cancer models and functional genomics. | | | | | | | | Rb suppresses human cone-precursor-derived retinoblastoma tumours ▶ | | | Xiaoliang L. Xu, Hardeep P. Singh, Lu Wang et al. | | | The nature of the retinal cell-type-specific circuitry that predisposes to retinoblastoma is demonstrated, in which a program that is unique to post-mitotic human cone precursors sensitizes to the oncogenic effects of retinoblastoma (Rb) protein depletion; hence, the loss of Rb collaborates with the molecular framework of cone precursors to initiate tumorigenesis. | | | | | | | | Noncoding RNA transcription targets AID to divergently transcribed loci in B cells ▶ | | | Evangelos Pefanis, Jiguang Wang, Gerson Rothschild et al. | | | The 11-subunit RNA exosome is thought to regulate the mammalian noncoding transcriptome; here, a mouse model is generated in which the essential Exosc3 subunit of the RNA exosome in B cells is conditionally deleted, revealing a link between sites of genomic RNA exosome function and AID-mediated chromosomal translocations. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
|  | | A picture of health In a series of four films reporter Lorna Stewart travels to the German island of Lindau to meet 600 of science’s brightest young minds and 37 rock stars – Nobel laureates.Watch the full series of films including this week’s release Winning the war? with Michael Bishop and Harald Zur Hausennature.com/lindau/2014
Supported by Mars, Incorporated and published weekly from Sep 24th - Oct 15th | | | | | |
| | | | | | | | | | | | | | | | Mesenchymal–endothelial transition contributes to cardiac neovascularization ▶ | | | Eric Ubil, Jinzhu Duan, Indulekha C. L. Pillai et al. | | | This study shows that cardiac injury induces cardiac fibroblasts to undergo mesenchymal–endothelial transition and acquire an endothelial-cell like fate, a process mediated, in part, by a p53-dependent mechanism — use of a small molecule activator of p53 increases mesenchymal–endothelial transition, leading to reduced scarring and better preservation of heart function. | | | | | | | | | | | | | | | | | CRISPR-mediated direct mutation of cancer genes in the mouse liver ▶ | | | Wen Xue, Sidi Chen, Hao Yin et al. | | | CRISPR plasmids targeting Pten and p53, alone and in combination, are delivered by hydrodynamic injection to the liver; the CRISPR-mediated mutations phenocopy the effects of deletions using Cre–LoxP technology, allowing the direct mutation of tumour suppressor genes and oncogenes in the liver using the CRISPR/Cas system, which presents a new approach for rapid development of liver cancer models and functional genomics. | | | | | | | | Rb suppresses human cone-precursor-derived retinoblastoma tumours ▶ | | | Xiaoliang L. Xu, Hardeep P. Singh, Lu Wang et al. | | | The nature of the retinal cell-type-specific circuitry that predisposes to retinoblastoma is demonstrated, in which a program that is unique to post-mitotic human cone precursors sensitizes to the oncogenic effects of retinoblastoma (Rb) protein depletion; hence, the loss of Rb collaborates with the molecular framework of cone precursors to initiate tumorigenesis. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Inefficient star formation in extremely metal poor galaxies ▶ | | | Yong Shi, Lee Armus, George Helou et al. | | | Spatially resolved infrared observations of two galaxies with oxygen abundances below 10 per cent of the solar value show that stars formed very inefficiently in seven star-forming clumps, suggesting that star formation may have been very inefficient in the early Universe. | | | | | | | | Binary orbits as the driver of γ-ray emission and mass ejection in classical novae ▶ | | | Laura Chomiuk, Justin D. Linford, Jun Yang et al. | | | High-resolution radio imaging of the γ-ray-emitting nova V959 Mon, hosted by a white dwarf and its binary companion, shows that gaseous ejecta are expelled along the poles as a wind from the white dwarf, that denser material drifts out along the equatorial plane, propelled by orbital motion, and that γ-ray production occurs at the interface between these polar and equatorial regions. | | | | | | | | Giant Rydberg excitons in the copper oxide Cu2O ▶ | | | T. Kazimierczuk, D. Fröhlich, S. Scheel et al. | | | Rydberg excitons (condensed-matter analogues of hydrogen atoms) are shown to exist in single-crystal copper oxide with principal quantum numbers as large as n=25 and giant wavefunctions with extensions of around two micrometres; this has implications for research in condensed-matter optics. | | | | | | | | Lithium–antimony–lead liquid metal battery for grid-level energy storage ▶ | | | Kangli Wang, Kai Jiang, Brice Chung et al. | | | All-liquid batteries comprising a lithium negative electrode and an antimony–lead positive electrode have a higher current density and a longer cycle life than conventional batteries, can be more easily used to make large-scale storage systems, and so potentially present a low-cost means of grid-level energy storage. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Molecular biology: Remove, reuse, recycle ▶ | | | Waste removal is not usually described as sexy, but the once-neglected field of autophagy — which plays a part in cancer and other diseases — is a hot topic in biomedical research. | | | | | | | | Q&A: Jules Hoffmann ▶ | | | Jules Hoffmann shared the 2011 Nobel prize in Physiology or Medicine for discoveries in the activation of innate immunity against bacteria and fungi in fruit flies. Now based at the Institute of Molecular and Cellular Biology at Strasbourg University in France, Hoffmann talks to ádám and Dávid Tárnoki about how to use the immune system to kill cancer cells. | | | | | | | | Q&A: Barry Marshall ▶ | | | Laureate Barry Marshall, professor of clinical microbiology at the University of Western Australia in Perth, tells Meghan Azad why he risked his health to prove his theory about the link between stomach ulcers and bacteria. He shared the 2005 Nobel prize with Robin Warren for discovering the stomach-dwelling bacterium Helicobacter pylori and for proving that it is this microorganism, not stress, that causes most peptic ulcers. | | | | | | | | Q&A: Françoise Barré-Sinoussi ▶ | | | Françoise Barré-Sinoussi and Luc Montagnier were jointly awarded the 2008 Nobel prize in Physiology or Medicine for their discovery of HIV in 1983. Three decades on, Barré-Sinoussi is director of the Retroviral Infections unit at the Pasteur Institute in Paris. Here, she tells Iria Gomez-Touriño about the latest strategies to combat the virus. | | | | | | | | Q&A: Michael Bishop ▶ | | | Michael Bishop and Harold Varmus proved that genetic changes could drive the formation of tumours. They were awarded the 1989 Nobel prize in Physiology or Medicine for discovering the origin of retroviral oncogenes. Bishop — now director of the GW Hooper Foundation at the University of California, San Francisco — tells Kipp Weiskopf about 40 years in cancer research. | | | | | | | | Q&A: Torsten Wiesel ▶ | | | Torsten Wiesel is president emeritus of Rockefeller University in New York City. He shared half of the 1981 Nobel Prize in Physiology or Medicine with David Hubel for their discoveries concerning information processing in the visual system. He tells Stefano Sandrone about his greatest scientific achievement and his vision of the future. | | | | | | | | Q&A: Brian Kobilka ▶ | | | Brian Kobilka shared the 2012 Nobel Prize in Chemistry with Robert Lefkowitz for their studies of G protein-coupled receptors. He is professor of molecular and cellular physiology at the Stanford University School of Medicine in California. Haya Jamal Azouz asks Kobilka what it takes to spend 30 years answering a single research question. | | | | | | | | | | | | | | |
| | | Nature Outlook Assessing Science Australia and New Zealand might be neighbours, but their programmes of research assessment are very different. Focusing on the tools and methods used to measure the quality and impact of science in Australia and New Zealand should inform similar debates throughout the scientific world. Access the Outlook free online. | | | | | |
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