Abstract:
:The Frank-Starling relation is a fundamental auto-regulatory property of the heart that ensures the volume of blood ejected in each heartbeat is matched to the extent of venous filling. At the cellular level, heart muscle cells generate higher force when stretched, but despite intense efforts the underlying molecular mechanism remains unknown. We applied a fluorescence-based method, which reports structural changes separately in the thick and thin filaments of rat cardiac muscle, to elucidate that mechanism. The distinct structural changes of troponin C in the thin filaments and myosin regulatory light chain in the thick filaments allowed us to identify two aspects of the Frank-Starling relation. Our results show that the enhanced force observed when heart muscle cells are maximally activated by calcium is due to a change in thick filament structure, but the increase in calcium sensitivity at lower calcium levels is due to a change in thin filament structure.
journal_name
Elifejournal_title
eLifeauthors
Zhang X,Kampourakis T,Yan Z,Sevrieva I,Irving M,Sun YBdoi
10.7554/eLife.24081subject
Has Abstractpub_date
2017-02-23 00:00:00issn
2050-084Xjournal_volume
6pub_type
杂志文章相关文献
eLife文献大全abstract::Most neurogenesis in the mammalian brain is completed embryonically, but in certain areas the production of neurons continues throughout postnatal life. The functional properties of mature postnatally generated neurons often match those of their embryonically produced counterparts. However, we show here that in the ol...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.32373
更新日期:2018-04-20 00:00:00
abstract::Experiments in which monkeys have to select or estimate the location of a target are revealing more about the role of the dorsal premotor cortex in decision making. ...
journal_title:eLife
pub_type: 评论,杂志文章
doi:10.7554/eLife.18721
更新日期:2016-07-15 00:00:00
abstract::Cortical plasticity is fundamental to motor recovery following cortical perturbation. However, it is still unclear how this plasticity is induced at a functional circuit level. Here, we investigated motor recovery and underlying neural plasticity upon optogenetic suppression of a cortical area for eye movement. Using ...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.50855
更新日期:2019-11-05 00:00:00
abstract::The Fluc family of F(-) ion channels protects prokaryotes and lower eukaryotes from the toxicity of environmental F(-). In bacteria, these channels are built as dual-topology dimers whereby the two subunits assemble in antiparallel transmembrane orientation. Recent crystal structures suggested that Fluc channels conta...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.18767
更新日期:2016-07-23 00:00:00
abstract::We present in vivo single-cell FRET measurements in the Escherichia coli chemotaxis system that reveal pervasive signaling variability, both across cells in isogenic populations and within individual cells over time. We quantify cell-to-cell variability of adaptation, ligand response, as well as steady-state output le...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.27455
更新日期:2017-12-12 00:00:00
abstract::LAMP1 and LAMP2 proteins are highly abundant, ubiquitous, mammalian proteins that line the lysosome limiting membrane, and protect it from lysosomal hydrolase action. LAMP2 deficiency causes Danon's disease, an X-linked hypertrophic cardiomyopathy. LAMP2 is needed for chaperone-mediated autophagy, and its expression i...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.21635
更新日期:2016-09-24 00:00:00
abstract::In recent years, functional genomics approaches combining genetic information with bulk RNA-sequencing data have identified the downstream expression effects of disease-associated genetic risk factors through so-called expression quantitative trait locus (eQTL) analysis. Single-cell RNA-sequencing creates enormous opp...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.52155
更新日期:2020-03-09 00:00:00
abstract::Cognitive control proactively configures information processing to suit expected task demands. Predictions of forthcoming demand can be driven by explicit external cues or be generated internally, based on past experience (cognitive history). However, it is not known whether and how the brain reconciles these two sour...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.39497
更新日期:2018-08-16 00:00:00
abstract::Mitochondria play important roles in cellular processes and disease, yet little is known about how the transcriptional regime of the mitochondrial genome varies across individuals and tissues. By analyzing >11,000 RNA-sequencing libraries across 36 tissue/cell types, we find considerable variation in mitochondrial-enc...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.41927
更新日期:2019-02-18 00:00:00
abstract::The roles of long non-coding RNAs (lncRNAs) in regulating cancer and stem cells are being increasingly appreciated. Its diverse mechanisms provide the regulatory network with a bigger repertoire to increase complexity. Here we report a novel LncRNA, Lnc34a, that is enriched in colon cancer stem cells (CCSCs) and initi...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.14620
更新日期:2016-04-14 00:00:00
abstract::Altered insulin signaling has been linked to widespread nervous system dysfunction including cognitive dysfunction, neuropathy and susceptibility to neurodegenerative disease. However, knowledge of the cellular mechanisms underlying the effects of insulin on neuronal function is incomplete. Here, we show that cell aut...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.16807
更新日期:2016-08-15 00:00:00
abstract::Shade avoidance syndrome enables shaded plants to grow and compete effectively against their neighbors. In Arabidopsis, the shade-induced de-phosphorylation of the transcription factor PIF7 (PHYTOCHROME-INTERACTING FACTOR 7) is the key event linking light perception to stem elongation. However, the mechanism through w...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.31636
更新日期:2018-06-21 00:00:00
abstract::How circuits assemble starting from stem cells is a fundamental question in developmental neurobiology. We test the hypothesis that, in neuronal stem cells, temporal transcription factors predictably control neuronal terminal features and circuit assembly. Using the Drosophila motor system, we manipulate expression of...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.46089
更新日期:2019-09-10 00:00:00
abstract::Mitochondria are dynamic organelles that must precisely control their protein composition according to cellular energy demand. Although nuclear-encoded mRNAs can be localized to the mitochondrial surface, the importance of this localization is unclear. As yeast switch to respiratory metabolism, there is an increase in...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.57814
更新日期:2020-08-07 00:00:00
abstract::A temperature-sensitive receptor prevents mosquitoes from being attracted to targets that are hotter than a potential host. ...
journal_title:eLife
pub_type: 评论,杂志文章
doi:10.7554/eLife.12838
更新日期:2015-12-15 00:00:00
abstract::Lipoprotein lipase (LPL) undergoes spontaneous inactivation via global unfolding and this unfolding is prevented by GPIHBP1 (Mysling et al., 2016). We now show: (1) that ANGPTL4 inactivates LPL by catalyzing the unfolding of its hydrolase domain; (2) that binding to GPIHBP1 renders LPL largely refractory to this inhib...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.20958
更新日期:2016-12-08 00:00:00
abstract::The insular cortex (IC) plays key roles in emotional and regulatory brain functions and is affected across psychiatric diseases. However, the brain-wide connections of the mouse IC have not been comprehensively mapped. Here, we traced the whole-brain inputs and outputs of the mouse IC across its rostro-caudal extent. ...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.55585
更新日期:2020-09-17 00:00:00
abstract::The spinal cord has the capacity to coordinate motor activities such as locomotion. Following spinal transection, functional activity can be regained, to a degree, following motor training. To identify microcircuits involved in this recovery, we studied a population of mouse spinal interneurons known to receive direct...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.21715
更新日期:2016-12-15 00:00:00
abstract::Toothed whales use sonar to detect, locate, and track prey. They adjust emitted sound intensity, auditory sensitivity and click rate to target range, and terminate prey pursuits with high-repetition-rate, low-intensity buzzes. However, their narrow acoustic field of view (FOV) is considered stable throughout target ap...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.05651
更新日期:2015-03-20 00:00:00
abstract::Neurons coding for head-direction are crucial for spatial navigation. Here we explored the cellular basis of head-direction coding in the rat dorsal presubiculum (PreS). We found that layer2 is composed of two principal cell populations (calbindin-positive and calbindin-negative neurons) which targeted the contralater...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.14592
更新日期:2016-06-10 00:00:00
abstract::bicoid mRNA localises to the Drosophila oocyte anterior from stage 9 of oogenesis onwards to provide a local source for Bicoid protein for embryonic patterning. Live imaging at stage 9 reveals that bicoid mRNA particles undergo rapid Dynein-dependent movements near the oocyte anterior, but with no directional bias. Fu...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.17537
更新日期:2016-10-28 00:00:00
abstract::The neural control of sugar consumption is critical for normal metabolism. In contrast to sugar-sensing taste neurons that promote consumption, we identify a taste neuron that limits sucrose consumption in Drosophila. Silencing of the neuron increases sucrose feeding; optogenetic activation decreases it. The feeding i...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.24992
更新日期:2017-03-23 00:00:00
abstract::Despite their importance in sexual differentiation and reproduction, Y chromosome genes are rarely described because they reside in repeat-rich regions that are difficult to study. Here, we show that Guy1, a unique Y chromosome gene of a major urban malaria mosquito Anopheles stephensi, confers 100% female lethality w...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.19281
更新日期:2016-09-20 00:00:00
abstract::The biological players involved in angiogenesis are only partially defined. Here, we report that endothelial cells (ECs) express a novel isoform of the cell-surface adhesion molecule L1CAM, termed L1-ΔTM. The splicing factor NOVA2, which binds directly to L1CAM pre-mRNA, is necessary and sufficient for the skipping of...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.44305
更新日期:2019-03-04 00:00:00
abstract::Epicardial cells on the heart's surface give rise to coronary artery smooth muscle cells (caSMCs) located deep in the myocardium. However, the differentiation steps between epicardial cells and caSMCs are unknown as are the final maturation signals at coronary arteries. Here, we use clonal analysis and lineage tracing...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.10036
更新日期:2015-10-19 00:00:00
abstract::The Reproducibility Project: Cancer Biology seeks to address growing concerns about reproducibility in scientific research by conducting replications of selected experiments from a number of high-profile papers in the field of cancer biology. The papers, which were published between 2010 and 2012, were selected on the...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.12470
更新日期:2016-03-01 00:00:00
abstract::Contrary to dogma, evolutionarily young and dynamic genes can encode essential functions. We find that evolutionarily dynamic ZAD-ZNF genes, which encode the most abundant class of insect transcription factors, are more likely to encode essential functions in Drosophila melanogaster than ancient, conserved ZAD-ZNF gen...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.63368
更新日期:2020-11-10 00:00:00
abstract::Direct activation of the human phospholipase C-γ isozymes (PLC-γ1, -γ2) by tyrosine phosphorylation is fundamental to the control of diverse biological processes, including chemotaxis, platelet aggregation, and adaptive immunity. In turn, aberrant activation of PLC-γ1 and PLC-γ2 is implicated in inflammation, autoimmu...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.51700
更新日期:2019-12-31 00:00:00
abstract::It is now clear that microglia and macrophages are present in brain tumors, but whether or how they affect initiation and development of tumors is not known. Exploiting the advantages of the zebrafish (Danio rerio) model, we showed that macrophages and microglia respond immediately upon oncogene activation in the brai...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.31918
更新日期:2018-02-21 00:00:00
abstract::Transposable elements (TEs), the movement of which can damage the genome, are epigenetically silenced in eukaryotes. Intriguingly, TEs are activated in the sperm companion cell - vegetative cell (VC) - of the flowering plant Arabidopsis thaliana. However, the extent and mechanism of this activation are unknown. Here w...
journal_title:eLife
pub_type: 杂志文章
doi:10.7554/eLife.42530
更新日期:2019-05-28 00:00:00