Abstract:
:Mammalian neurons contain at least three types of excitatory amino-acid receptors, selectively activated by N-methyl-D-aspartate (NMDA) or aspartate, (S)-alpha-amino-3-hydroxy-5-methyl-4-isoxazole proprionate ((S)-AMPA) and kainate. An important aspect of NMDA receptors is their regulation by a variety of factors such as glycine, Mg2+ and Zn2+ that are present in vivo. We show here that NMDA receptor responses are selectively inhibited by protons, with a 50% inhibitory concentration (IC50) that is close to physiological pH, implying that NMDA receptors are not fully active under normal conditions. (S)-AMPA and kainate responses remain unchanged at similar pH levels. Proton inhibition is voltage-insensitive and does not result either from fast channel block, a change in channel conductance, or an increase in the 50% excitatory concentration (EC50) of aspartate/NMDA or glycine. Instead, protons seem to decrease markedly the opening frequency of 30-50 pS NMDA channels, and reduce the relative proportion of longer bursts. This feature of NMDA receptors could be relevant to neurotoxic activation of NMDA receptors during ischaemia, as well as to seizure generation, as extracellular proton changes occur during both of these pathological situations. Furthermore, these results may have implications for normal NMDA receptor function as transient changes in extracellular protons occur during synaptic transmission.
journal_name
Naturejournal_title
Natureauthors
Traynelis SF,Cull-Candy SGdoi
10.1038/345347a0subject
Has Abstractpub_date
1990-05-24 00:00:00pages
347-50issue
6273eissn
0028-0836issn
1476-4687journal_volume
345pub_type
杂志文章相关文献
NATURE文献大全abstract::The spontaneously hypertensive rat and the stroke-prone spontaneously hypertensive rat are useful models for human hypertension. In these strains hypertension is a polygenic trait, in which both autosomal and sex-linked genes can influence blood pressure. Linkage studies in crosses between the stroke-prone spontaneous...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/353521a0
更新日期:1991-10-10 00:00:00
abstract::The lack of a reliable theory of glass physics has led to the pursuit of correlations between various glass or viscous liquid parameters, one of which is the slope m of the plot of log(viscosity) against Tg/T, extrapolated at the glass-transition temperature, Tg, also termed 'fragility'. Novikov and Sokolov conclude t...
journal_title:Nature
pub_type: 评论,杂志文章
doi:10.1038/nature04967
更新日期:2006-08-03 00:00:00
abstract::The immunoglobulin superfamily is a group of proteins, each made of one or several domains sharing key structural features with either the variable (V) or the constant (C) immunoglobulin domains. It includes such functionally important members as the immunoglobulins themselves, major histocompatibility complex (MHC) c...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/328267a0
更新日期:1987-07-16 00:00:00
abstract::Individuals with congenital or acquired prolongation of the QT interval, or long QT syndrome (LQTS), are at risk of life-threatening ventricular arrhythmia. LQTS is commonly genetic in origin but can also be caused or exacerbated by environmental factors. A missense mutation in the L-type calcium channel Ca(V)1.2 lead...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature09855
更新日期:2011-03-10 00:00:00
abstract::Numerous reports have emphasized the need for major changes in the global food system: agriculture must meet the twin challenge of feeding a growing population, with rising demand for meat and high-calorie diets, while simultaneously minimizing its global environmental impacts. Organic farming—a system aimed at produc...
journal_title:Nature
pub_type: 杂志文章,meta分析
doi:10.1038/nature11069
更新日期:2012-05-10 00:00:00
abstract::The sequence-specific DNA-binding protein, MyoD, can activate muscle-specific gene expression in some cells in culture. Xenopus MyoD (XMyoD) transcription is activated as a consequence of mesoderm induction in the early myotomes, from which the axial musculature develops. XMyoD RNA accumulates about two hours before m...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/347197a0
更新日期:1990-09-13 00:00:00
abstract::In vertebrates the developing hindbrain is organized in segmental units. These units provide the primary grid for differentiation and axonal outgrowth. In the more anterior regions of the brain, however, the subdivisions remain more controversial. Cellular and molecular studies of the embryonic brain in lower vertebra...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/353267a0
更新日期:1991-09-19 00:00:00
abstract::Since the discovery of the first exoplanets, it has been known that other planetary systems can look quite unlike our own. Until fairly recently, we have been able to probe only the upper range of the planet size distribution, and, since last year, to detect planets that are the size of Earth or somewhat smaller. Hith...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature11914
更新日期:2013-02-28 00:00:00
abstract::The TE1 family of transposable elements (TEs) of Drosophila consists of unusually large transposons, cytologically visible in larval polytene chromosomes as one or more bands. They are composite elements, as their termini consist of foldback (FB) sequences which are themselves transposable. The location of FB elements...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/316081a0
更新日期:1985-07-04 00:00:00
abstract::The quest for higher data density in information storage is motivating investigations into approaches for manipulating magnetization by means other than magnetic fields. This is evidenced by the recent boom in magnetoelectronics and 'spintronics', where phenomena such as carrier effects in magnetic semiconductors and ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature02728
更新日期:2004-07-29 00:00:00
abstract::Early sensory experience instructs the maturation of neural circuitry in the cortex. This has been studied extensively in the primary visual cortex, in which loss of vision to one eye permanently degrades cortical responsiveness to that eye, a phenomenon known as ocular dominance plasticity (ODP). Cortical inhibition ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature12485
更新日期:2013-09-26 00:00:00
abstract::The DNA polymerase V (pol V) and RecA proteins are essential components of a mutagenic translesion synthesis pathway in Escherichia coli designed to cope with DNA damage. Previously, it has been assumed that RecA binds to the DNA template strand being copied. Here we show, however, that pol-V-catalysed translesion syn...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature05042
更新日期:2006-08-24 00:00:00
abstract::The internal organization of eukaryotic cells into functionally specialized, membrane-delimited organelles of unique composition implies a need for active, regulated lipid transport. Phosphatidylserine (PS), for example, is synthesized in the endoplasmic reticulum and then preferentially associates--through mechanisms...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature12430
更新日期:2013-09-12 00:00:00
abstract::The metabolic basis of the autosomal recessive disease cystic fibrosis (CF) remains unidentified. Elevated levels of a serum protein in CF homozygotes and obligate heterozygotes have been described. As heterozygotes are clinically unaffected, any consistently observed abnormality in these individuals is a likely point...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/326614a0
更新日期:1987-04-09 00:00:00
abstract::To trigger class II-restricted T cells, antigen presenting cells have to capture antigens, process them and display their fragments in association with class II molecules. In most species, activated T cells express class II molecules; however, no evidence has been found that these cells can present soluble antigens. T...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/334530a0
更新日期:1988-08-11 00:00:00
abstract::Cancer cells hijack and remodel existing metabolic pathways for their benefit. Argininosuccinate synthase (ASS1) is a urea cycle enzyme that is essential in the conversion of nitrogen from ammonia and aspartate to urea. A decrease in nitrogen flux through ASS1 in the liver causes the urea cycle disorder citrullinaemia...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature15529
更新日期:2015-11-19 00:00:00
abstract::Stevens-Johnson syndrome and the related disease toxic epidermal necrolysis are life-threatening reactions of the skin to particular types of medication. Here we show that there is a strong association in Han Chinese between a genetic marker, the human leukocyte antigen HLA-B*1502, and Stevens-Johnson syndrome induced...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/428486a
更新日期:2004-04-01 00:00:00
abstract::Tuberculosis is the leading cause of death in the world resulting from a single bacterial infection. Despite its enormous burden on world health, little is known about the molecular mechanisms of pathogenesis of Mycobacterium tuberculosis. Bacterial multiplication and concomitant tissue damage within an infected host,...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/47042
更新日期:1999-11-04 00:00:00
abstract::A significant portion of prebiotic organic matter on the early Earth may have been introduced by carbonaceous asteroids and comets. The distribution and stable-isotope composition of individual organic compounds in carbonaceous meteorites, which are thought to be derived from asteroidal parent bodies, may therefore pr...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/348047a0
更新日期:1990-11-01 00:00:00
abstract::Piezoelectric materials, which convert mechanical to electrical energy (and vice versa), are crucial in medical imaging, telecommunication and ultrasonic devices. A new generation of single-crystal materials, such as Pb(Zn1/3Nb2/3)O3-PbTiO3 (PZN-PT) and Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT), exhibit a piezoelectric effect ...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/35002022
更新日期:2000-01-20 00:00:00
abstract::Intensive fisheries have reduced fish biodiversity and abundance in aquatic ecosystems worldwide1-3. 'No-take' marine reserves have become a cornerstone of marine ecosystem-based fisheries management4-6, and their benefits for adjacent fisheries are maximized when reserve design fosters synergies among nearby reserves...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/s41586-020-2944-y
更新日期:2020-12-01 00:00:00
abstract::From drug delivery to chemical and biological catalysis and cosmetics, the need for efficient fabrication pathways for particles over a wide range of sizes, from a variety of materials, and in many different structures has been well established. Here we harness the inherent scalability of fibre production and an in-fi...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature11215
更新日期:2012-07-26 00:00:00
abstract::Cocaine is a powerfully addictive substance and new strategies are needed to treat its abuse. Generating an active immunization to cocaine offers a means of blocking the actions of the drug by preventing it from entering the central nervous system, and should have fewer side effects than treatments based on manipulati...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/378727a0
更新日期:1995-12-14 00:00:00
abstract::Many tissues including blood, skin, gut and germ cells are continuously maintained by tissue stem cells. Under certain conditions, however, other organs can undergo repair using stem-cell-like progenitors generated by cell de-differentiation. Cell fates have been broadened experimentally, but mechanisms allowing de-di...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature02436
更新日期:2004-04-01 00:00:00
abstract::Gradual accumulation of evidence is thought to be fundamental for decision-making, and its neural correlates have been found in several brain regions. Here we develop a generalizable method to measure tuning curves that specify the relationship between neural responses and mentally accumulated evidence, and apply it t...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature14066
更新日期:2015-04-09 00:00:00
abstract::The ability to repair or promote regeneration within the adult human brain has been envisioned for decades. Until recently, such efforts mainly involved delivery of growth factors and cell transplants designed to rescue or replace a specific population of neurons, and the results have largely been disappointing. New a...
journal_title:Nature
pub_type: 杂志文章,评审
doi:10.1038/s41586-018-0087-1
更新日期:2018-05-01 00:00:00
abstract::Williams syndrome is a genetic neurodevelopmental disorder characterized by an uncommon hypersociability and a mosaic of retained and compromised linguistic and cognitive abilities. Nearly all clinically diagnosed individuals with Williams syndrome lack precisely the same set of genes, with breakpoints in chromosome b...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature19067
更新日期:2016-08-18 00:00:00
abstract::The development of colloidal quantum dots has led to practical applications of quantum confinement, such as in solution-processed solar cells, lasers and as biological labels. Further scientific and technological advances should be achievable if these colloidal quantum systems could be electronically coupled in a gene...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature02695
更新日期:2004-07-08 00:00:00
abstract::Mutational activation of BRAF is the most prevalent genetic alteration in human melanoma, with ≥50% of tumours expressing the BRAF(V600E) oncoprotein. Moreover, the marked tumour regression and improved survival of late-stage BRAF-mutated melanoma patients in response to treatment with vemurafenib demonstrates the ess...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/nature11814
更新日期:2013-02-14 00:00:00
abstract::CYCLINS are proteins synthesized during each cell cycle and abruptly destroyed in each mitosis. Cyclins have been implicated in the induction of mitosis and are associated with the serine-threonine protein kinase p34cdc2 as components of mitosis promoting factor (MPF). On the basis of conserved sequence motifs cyclins...
journal_title:Nature
pub_type: 杂志文章
doi:10.1038/346760a0
更新日期:1990-08-23 00:00:00