0000000000379401

AUTHOR

Jin Cheng

showing 3 related works from this author

Precise Somatotopic Thalamocortical Axon Guidance Depends on LPA-Mediated PRG-2/Radixin Signaling

2016

Summary Precise connection of thalamic barreloids with their corresponding cortical barrels is critical for processing of vibrissal sensory information. Here, we show that PRG-2, a phospholipid-interacting molecule, is important for thalamocortical axon guidance. Developing thalamocortical fibers both in PRG-2 full knockout (KO) and in thalamus-specific KO mice prematurely entered the cortical plate, eventually innervating non-corresponding barrels. This misrouting relied on lost axonal sensitivity toward lysophosphatidic acid (LPA), which failed to repel PRG-2-deficient thalamocortical fibers. PRG-2 electroporation in the PRG-2−/− thalamus restored the aberrant cortical innervation. We ide…

0301 basic medicineNeuroscience(all)ThalamusGrowth ConesSensory systemBiologyArticle03 medical and health scienceschemistry.chemical_compoundMice0302 clinical medicineDiscrimination PsychologicalThalamusRadixinLysophosphatidic acidNeural PathwaysmedicineAnimalsPhosphorylationGrowth coneCerebral CortexMice KnockoutGeneral NeuroscienceMembrane ProteinsAxon GuidanceCytoskeletal Proteins030104 developmental biologymedicine.anatomical_structurechemistryCerebral cortexAxon guidanceSignal transductionLysophospholipidsNeuroscience030217 neurology & neurosurgerySignal TransductionNeuron
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Synaptic Phospholipid Signaling Modulates Axon Outgrowth via Glutamate-dependent Ca2+-mediated Molecular Pathways.

2015

Abstract Altered synaptic bioactive lipid signaling has been recently shown to augment neuronal excitation in the hippocampus of adult animals by activation of presynaptic LPA2-receptors leading to increased presynaptic glutamate release. Here, we show that this results in higher postsynaptic Ca2+ levels and in premature onset of spontaneous neuronal activity in the developing entorhinal cortex. Interestingly, increased synchronized neuronal activity led to reduced axon growth velocity of entorhinal neurons which project via the perforant path to the hippocampus. This was due to Ca2+-dependent molecular signaling to the axon affecting stabilization of the actin cytoskeleton. The spontaneous…

0301 basic medicineCognitive NeuroscienceNeuronal OutgrowthHippocampusGlutamic AcidAxon hillockSynaptic Transmission03 medical and health sciencesCellular and Molecular NeuroscienceMice0302 clinical medicinePostsynaptic potentialmedicinePremovement neuronal activityAnimalsbioactive phospholipidsCalcium SignalingAxonearly synchronized activityCells CulturedPhospholipidsChemistryOriginal ArticlesEntorhinal cortexPerforant pathActin cytoskeletonAxonsCell biologyCa2+-signalingentorhinal–hippocampal formation030104 developmental biologymedicine.anatomical_structureaxon outgrowthnervous systemCalcium030217 neurology & neurosurgeryMetabolic Networks and PathwaysCerebral cortex (New York, N.Y. : 1991)
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Molecular cause and functional impact of altered synaptic lipid signaling due to a prg‐1 gene SNP

2015

Loss of plasticity-related gene 1 (PRG-1), which regulates synaptic phospholipid signaling, leads to hyperexcitability via increased glutamate release altering excitation/inhibition (E/I) balance in cortical networks. A recently reported SNP in prg-1 (R345T/ mutPRG-1) affects ~5 million European and US citizens in a monoallelic variant. Our studies show that this mutation leads to a loss-of-PRG-1 function at the synapse due to its inability to control lysophosphatidic acid (LPA) levels via a cellular uptake mechanism which appears to depend on proper glycosylation altered by this SNP. PRG-1 +/ mice, which are animal correlates of human PRG-1 +/mut carriers, showed an altered cortical networ…

0301 basic medicineGeneticseducation.field_of_studySensory gatingPopulationGlutamate receptorLipid signalingBiologyCell biologySynapse03 medical and health scienceschemistry.chemical_compound030104 developmental biology0302 clinical medicinemedicine.anatomical_structurechemistryLysophosphatidic acidmedicineMolecular MedicineSignal transductionAutotaxineducation030217 neurology & neurosurgeryEMBO Molecular Medicine
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