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VMP1, a novel prognostic biomarker, contributes to glioma development by regulating autophagy
Journal of Neuroinflammation ( IF 9.3 ) Pub Date : 2021-07-26 , DOI: 10.1186/s12974-021-02213-z
Wanzun Lin 1, 2, 3 , Yun Sun 2, 3, 4 , Xianxin Qiu 2, 3, 4 , Qingting Huang 2, 3, 4 , Lin Kong 1, 2, 3 , Jiade J Lu 2, 3, 4
Affiliation  

Malignant glioma, especially glioblastoma, is a highly aggressive disease with a dismal prognosis. Vacuole membrane protein 1 (VMP1) is a critical autophagy-associated protein with roles in oncogenesis and tumor progression. However, the contribution of VMP1 to glioma development as well as its prognostic value has not been established. The expression of VMP1 and clinicopathologic data for 1996 glioma samples were collected from authoritative public databases to explore its prognostic value. Lentiviral CRISPR-Cas9 gene editing system was performed to deplete VMP1 expression. Apoptosis assays, cell cycle assays, colony formation assays, and EdU incorporation analysis were conducted to validate the biological function of VMP1. Transmission electron microscopy was used to determine the role of VMP1 in regulating autophagy. VMP1 overexpression was associated with advanced disease and had a poor prognosis in patients with glioma. The depletion of VMP1 by CRISPR-Cas9 gene editing significantly inhibited cell proliferation, increased cell death, and induced cell cycle arrest. Mechanistically, VMP1 knockout blocked autophagic flux and thus sensitized glioma cells to radiotherapy and chemotherapy. Moreover, a nomogram model showed that VMP1 expression has high prognostic value for determining survival in glioma. Our results provide insights into the pathological and biological functions of VMP1, including its roles in promoting tumor growth and progression, and support its value as a new diagnostic and prognostic biomarker for glioma.

中文翻译:

VMP1,一种新的预后生物标志物,通过调节自噬促进神经胶质瘤的发展

恶性胶质瘤,尤其是胶质母细胞瘤,是一种高度侵袭性疾病,预后不佳。液泡膜蛋白 1 (VMP1) 是一种重要的自噬相关蛋白,在肿瘤发生和肿瘤进展中发挥作用。然而,尚未确定 VMP1 对胶质瘤发展的贡献及其预后价值。从权威的公共数据库收集1996年胶质瘤样本的VMP1表达和临床病理学数据,探讨其预后价值。执行慢病毒 CRISPR-Cas9 基因编辑系统以耗尽 VMP1 表达。进行细胞凋亡测定、细胞周期测定、集落形成测定和 EdU 掺入分析以验证 VMP1 的生物学功能。透射电子显微镜用于确定 VMP1 在调节自噬中的作用。VMP1 过表达与晚期疾病相关,并且在胶质瘤患者中预后不良。CRISPR-Cas9 基因编辑对 VMP1 的消耗显着抑制了细胞增殖,增加了细胞死亡,并诱导了细胞周期停滞。从机制上讲,VMP1 敲除阻断了自噬通量,从而使胶质瘤细胞对放疗和化疗敏感。此外,列线图模型显示 VMP1 表达对于确定胶质瘤的存活率具有很高的预后价值。我们的结果提供了对 VMP1 的病理和生物学功能的见解,包括其在促进肿瘤生长和进展中的作用,并支持其作为胶质瘤新的诊断和预后生物标志物的价值。CRISPR-Cas9 基因编辑对 VMP1 的消耗显着抑制了细胞增殖,增加了细胞死亡,并诱导了细胞周期停滞。从机制上讲,VMP1 敲除阻断了自噬通量,从而使胶质瘤细胞对放疗和化疗敏感。此外,列线图模型显示 VMP1 表达对于确定胶质瘤的存活率具有很高的预后价值。我们的结果提供了对 VMP1 的病理和生物学功能的见解,包括其在促进肿瘤生长和进展中的作用,并支持其作为胶质瘤新的诊断和预后生物标志物的价值。CRISPR-Cas9 基因编辑对 VMP1 的消耗显着抑制了细胞增殖,增加了细胞死亡,并诱导了细胞周期停滞。从机制上讲,VMP1 敲除阻断了自噬通量,从而使胶质瘤细胞对放疗和化疗敏感。此外,列线图模型显示 VMP1 表达对于确定胶质瘤的存活率具有很高的预后价值。我们的结果提供了对 VMP1 的病理和生物学功能的见解,包括其在促进肿瘤生长和进展中的作用,并支持其作为胶质瘤新的诊断和预后生物标志物的价值。列线图模型显示 VMP1 表达对于确定胶质瘤的存活率具有很高的预后价值。我们的结果提供了对 VMP1 的病理和生物学功能的见解,包括其在促进肿瘤生长和进展中的作用,并支持其作为胶质瘤新的诊断和预后生物标志物的价值。列线图模型显示 VMP1 表达对于确定胶质瘤的存活率具有很高的预后价值。我们的结果提供了对 VMP1 的病理和生物学功能的见解,包括其在促进肿瘤生长和进展中的作用,并支持其作为胶质瘤新的诊断和预后生物标志物的价值。
更新日期:2021-07-26
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