Results 91 to 100 of about 589,501 (292)
Advanced Science, EarlyView.Overview of the regulation of intrinsic and extrinsic signals during neurodevelopment. Intrinsic genetic signals from NSCs, in conjunction with cues from microglia and blood vessels, collaboratively regulate the proliferation of NSCs, their fate determination, synaptogenesis, synaptic pruning, neuronal survival, and death, as well as communication ...
Yanyan Wang +4 more
wiley +1 more source
Estimating the synaptic current in a multi-conductance AMPA receptor model [PDF]
, 2010 A pre-synaptic neuron releases diffusing neurotransmitters such as glutamate that activate post-synaptic receptors. The amplitude of the post-synaptic current, mostly mediated by glutamatergic (AMPARs) receptors, is a fundamental signal that may generate an action potential.
arxiv +1 more source
Where is the mind within the brain? Transient selection of subnetworks by metabotropic receptors and G protein-gated ion channels [PDF]
arXiv, 2022 Perhaps the most important question posed by brain research is: How the brain gives rise to the mind. To answer this question, we have primarily relied on the connectionist paradigm: The brain's entire knowledge and thinking skills are thought to be stored in the connections; and the mental operations are executed by network computations.
arxiv
Advanced Science, EarlyView.The genome of Megachile rotundata, an extensively managed solitary pollination bee species, has been sequenced, covering 280.68 Mb and predicting 10 701 genes. The study reveals significant expansions of the Toll gene family and their abundant expression in diapause prepupae, highlighting enhanced immune responses during diapause. This genome serves as
Rangjun Shi +8 more
wiley +1 more source
First evidence for the presence of amino acid sensing mechanisms in the fish gastrointestinal tract
Scientific Reports, 2021 This study aimed to characterize amino acid sensing systems in the gastrointestinal tract (GIT) of the carnivorous fish model species rainbow trout. We observed that the trout GIT expresses mRNAs encoding some amino acid receptors described in mammals ...
Jessica Calo +5 more
doaj +1 more source
Polar Chemoreceptor Clustering by Coupled Trimers of Dimers [PDF]
Biophys J 96(2): 453-463 (2009), 2009 Receptors of bacterial chemotaxis form clusters at the cell poles, where clusters act as "antennas" to amplify small changes in ligand concentration. Interestingly, chemoreceptors cluster at multiple length scales. At the smallest scale, receptors form dimers, which assemble into stable timers of dimers.
arxiv +1 more source
Glia, EarlyView.Comprehensive analysis of cortical astrocyte gene expression across the lifespan. Profiling dynamic changes of key astrocyte genes reveals functional shifts. Astrocytes contribute to gene‐length‐dependent transcription decline in the aging brain. ABSTRACT Astrocytes are the most abundant glial cell type in the central nervous system (CNS).
Xiaoran Wei +2 more
wiley +1 more source
Conformational diversity in class C GPCR positive allosteric modulation
Nature CommunicationsThe metabotropic glutamate receptors (mGlus) are class C G protein-coupled receptors (GPCR) that form obligate dimers activated by the major excitatory neurotransmitter L-glutamate.
Giuseppe Cannone +11 more
doaj +1 more source
Nicotinic α7 acetylcholine receptor-mediated currents are not modulated by the tryptophan metabolite kynurenic acid in adult hippocampal interneurons [PDF]
, 2012 The tryptophan metabolite, kynurenic acid (KYNA), is classically known to be an antagonist of ionotropic glutamate receptors. Within the last decade several reports have been published suggesting that KYNA also blocks nicotinic acetylcholine receptors (nAChRs) containing the \alpha7 subunit (\alpha7*).
arxiv +1 more source
Quantifying constraints determining independent activation on NMDA receptors mediated currents from evoked and spontaneous synaptic transmission at an individual synapse [PDF]
arXiv, 2022 A synapse acts on neural transmission through a chemical process called synapses fusion between pre-synaptic and post-synaptic terminals. Presynaptic terminals release neurotransmitters either in response to action potential or spontaneously independent of presynaptic activity.
arxiv