Dynamics of Nerve Growth Cone Guidance and Adhesion

在optical technology we investigated functions of growth cones of cultured neurons isolated from either the central or peripheral nervous system。Inward currents were recorded from DRG cell bodies in response to Mechanical stimuli to growth cones with the whole-cell patch clamp method at the holding potential of-60 mV。Their reversal potential changed according to the Nernst equation for Cly D1-イエD1.他们完全被废弃了NPPB的提取物应用。It is concluded that the inward currents are due to activation of mechanosensitive Cl-D1 channels preferentially locating on the growth cones。CaイD12+イエD1 channels on the growth cones were visualized by using imuno-gold particles。Cultured DRG神经元被Cai-D12 + Cai-D1阻断器、ω-agatoxin、ω-conotoxin和nicardipine预先处理，被相应的抗体孵化，最终被黄金修饰的抗体孵化。使用扫描和传输电子显微镜展示的观测结果 ... More ω-agatoxin-和ω-contoxin-敏感的Cai-D12 + Iye D1通道在生长条件下不受影响。[Cai-D12 + Iye D1] Ii-D2 i Iye D2-刺激被细胞体刺激抑制，被ω-agatoxin和ω-conotoxin抑制，但不是由nicardipine。The [CaイイD12+イイD1]イイD2iイD2-increase induced by 47 mM-KイD1+イイD1 solution even in the presence of both peptide toxins was blocked by nicardipine，suggesting that nicardipine-sensitive CaイイD12+イエD1channels may localize on the growth cones。Neurites in the frog spinal cord grew toward the negative electrode on untreated Falcon tissue culture plastic or on laminine substrate（negatively charged），但neurites growing on poly-lysine （positively charged） turned to ward the positive electrode。“对增长表面的收费影响了神经元性阴道病的频率。”It is concluded that the direction of neurite growth in an electric field is influenced by both substratum charge and growth cone-to substratum adhesivity。Dynamic changes of growth cones stained with DiI were observed with a total internal reflection fluorescence microscope （TIRFM）。High Ky D1+ Ky D1刺激to growth cone regions increased DiI-TIRFM intensity in those regions， demonstrating that the basal membrane of the growth cone approached the glass substrate。您的位置：知道173>> fluorescence intensity of fluo 3-loaded SCG neurons were observed with the TIRFM ; TIRFM images showed a pattern of spotted area of which brightness may indicate the [CaイD12+イエD1]イイD2iイエD2 in subManagement brane space。Less（低）

Using recent advance in optical technology we investigated functions of growth cones of cultured neurons isolated from either the central or peripheral nervous system.Inward currents were recorded from DRG cell bodies in response to mechanical stimuli to growth cones with the whole-cell patch clamp method at the holding potential of -60mV. Their reversal potential changed according to the Nernst equation for ClィイD1-ィエD1. They were completely abolished with extracellular application of NPPB. It is concluded that the inward currents are due to activation of mechanosensitive ClィイD1-ィエD1 channels preferentially locating on the growth cones.CaィイD12+ィエD1 channels on the growth cones were visualized by using imuno-gold particles. Cultured DRG neurons pretreated with CaィイD12+ィエD1 blockers, ω-agatoxin, ω-conotoxin and nicardipine, were incubated with the respective antibody and finally with gold-conjugated antibody. Observations with the scanning and transmission electron microscopy showed that … More ω-agatoxin- and ω-contoxin- sensitive CaィイD12+ィエD1 channels were immunologically localized on the growth cones.The [CaィイD12+ィエD1]ィイD2iィエD2-increase evoked by cell body stimulation was inhibited by ω-agatoxin and ω-conotoxin, but not by nicardipine. The [CaィイD12+ィエD1]ィイD2iィエD2-increase induced by 47mM-KィイD1+ィエD1 solution even in the presence of both peptide toxins was blocked by nicardipine, suggesting that nicardipine-sensitive CaィイD12+ィエD1 channels may localize on the growth cones.Neurites in the frog spinal cord grew toward the negative electrode on untreated Falcon tissue culture plastic or on laminine substrate (negatively charged), but neurites growing on poly-lysine (positively charged) turned toward the positive electrode. The charge of the growth surface influenced the frequency of anodal gavanotropism. It is concluded that the direction of neurite growth in an electric field is influenced by both substratum charge and growth cone-to substratum adhesivity.Dynamic changes of growth cones stained with DiI were observed with a total internal reflection fluorescence microscope (TIRFM). High KィイD1+ィエD1 stimulation to growth cone regions increased DiI-TIRFM intensity in those regions, demonstrating that the basal membrane of the growth cone approached the glass substrate. The changes in the fluorescence intensity of fluo 3-loaded SCG neurons were observed with the TIRFM ; TIRFM images showed a pattern of spotted area of which brightness may indicate the [CaィイD12+ィエD1]ィイD2iィエD2 in submembrane space. Less