The double deficiency of the SNARE proteins vti1a and vti1b affects neurite outgrowth and signaling in N1E-115 neuroblastoma cells.

IF 4.5 3区 生物学 Q2 CELL BIOLOGY European journal of cell biology Pub Date : 2024-10-09 DOI:10.1016/j.ejcb.2024.151461
Katharina Kotschnew , Denise Winkler , Jonas Reckmann , Charlotte Mann , Alina Schweigert , Greta Tellkamp , Kristian M. Müller , Gabriele Fischer von Mollard
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Abstract

During intracellular trafficking N-ethylmaleimide-sensitive-factor attachment receptor (SNARE) proteins catalyze the membrane fusion by assembling into a four-helix complex. In the mouse model, loss of the endosomal SNAREs vti1a and vti1b results in a perinatal lethal phenotype and neuronal defects including decreased neurite outgrowth in cultured primary neurons.
We used a CRISPR/Cas9 system to generate a Vti1a Vti1b double knockout (DKO) in the neuroblastoma cell line N1E-115. Three different DKO cell lines were obtained and examined at genome and protein level. The double deficiency impaired proper differentiation based on lower levels of synaptic proteins as well as reduced neurite formation and elongation compared to wild type cells in differentiation medium. Neurite elongation can be induced by a variety of extracellular signals via different signaling cascades. Treatment with the Rho kinase inhibitor Y27632, which stimulates enlargeosome exocytosis, or with neurotrophic factors (BDNF, NGF and NT3) resulted in reduced stimulation of all DKO clones and in significantly shorter neurites compared to wild type cells. The loss of vti1a and vti1b disrupted Akt signaling during enlargeosome-mediated and Erk signaling during BDNF-induced neurite outgrowth.
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SNARE 蛋白 vti1a 和 vti1b 的双重缺乏会影响 N1E-115 神经母细胞瘤细胞的神经元生长和信号传导。
在细胞内转运过程中,N-乙基马来酰亚胺敏感因子附着受体(SNARE)蛋白通过组装成一个四螺旋复合物来催化膜融合。我们利用 CRISPR/Cas9 系统在神经母细胞瘤细胞系 N1E-115 中产生了 Vti1a Vti1b 双基因敲除(DKO)。我们获得了三种不同的 DKO 细胞系,并对它们进行了基因组和蛋白质水平的检测。与分化培养基中的野生型细胞相比,双重基因缺失会降低突触蛋白的水平,并减少神经元的形成和伸长,从而影响细胞的正常分化。神经元的伸长可由多种细胞外信号通过不同的信号级联诱导。Rho激酶抑制剂Y27632可刺激 enlargeosome外渗,而神经营养因子(BDNF、NGF和NT3)则可减少对所有DKO克隆的刺激,与野生型细胞相比,神经元的长度也明显缩短。vti1a 和 vti1b 的缺失破坏了增大体介导的 Akt 信号转导和 BDNF 诱导的神经元生长过程中的 Erk 信号转导。
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来源期刊
European journal of cell biology
European journal of cell biology 生物-细胞生物学
CiteScore
7.30
自引率
1.50%
发文量
80
审稿时长
38 days
期刊介绍: The European Journal of Cell Biology, a journal of experimental cell investigation, publishes reviews, original articles and short communications on the structure, function and macromolecular organization of cells and cell components. Contributions focusing on cellular dynamics, motility and differentiation, particularly if related to cellular biochemistry, molecular biology, immunology, neurobiology, and developmental biology are encouraged. Manuscripts describing significant technical advances are also welcome. In addition, papers dealing with biomedical issues of general interest to cell biologists will be published. Contributions addressing cell biological problems in prokaryotes and plants are also welcome.
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