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Cited by 8Glioma Diagnosis and TreatmentCancer Cells and MetastasisMicrotubule and mitosis dynamics

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TUBB2B regulates epithelial-mesenchymal transition via interaction with Vimentin to promote glioma migration and invasion

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Li, Junxi, Zhou, Zhengjun, Zhang, Junrong, Wang, Ming, Luan, Xingzhao, Zhao, Mingkuan, Jiang, Geng, Wang, Guiyuan, Li, Shenjie, Xiang, Wei, Chen, Ligang, Zhou, Jie·2024·Cancer Cell International

Published version of a preprint

Abstract

BACKGROUND: Epithelial-mesenchymal transition (EMT) plays a crucial role in the migration and invasion capabilities of glioblastoma (GBM) cells. Several studies have established tubulin as a significant regulator of the EMT process. Tubulin beta 2B class IIb (TUBB2B), a critical component of microtubules, has been linked to the prognosis of various tumors. However, the specific biological function and mechanism of TUBB2B in GBM remain unclear. METHODS: In vitro experiments demonstrated that TUBB2B knockdown inhibited the migration and invasion of GBM cells, while its overexpression enhanced these capabilities. Western blot, immunofluorescence (IF) and co-immunoprecipitation (Co-IP) assays revealed that TUBB2B interacts with Vimentin. Molecular docking and residue mutation scanning indicated that TUBB2B interacts with Vimentin at the R391/K392/A393/F394 sites. In vivo experiments using nude mice confirmed that TUBB2B knockdown inhibited GBM cell invasion and migration. RESULTS: TUBB2B was upregulated in GBM tissue samples compared with normal tissues. The sites of TUBB2B(R391/K392/A393/F394) physically interacts with Vimentin to induce EMT, which promotes migration and invasion. CONCLUSION: TUBB2B may regulate EMT and promote the migration and invasion of GBM cells through its interaction with Vimentin, highlighting TUBB2B as a potential therapeutic target for GBM.

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Fig. 1 TUBB2B is upregulated in GBM tissues. (A-B) Based on GEPIA database analysis, TUBB2B was significantly upregulated in LGG and GBM; P < 0.05. (C-E) Prognostic value of TUBB2B in TGGA, CGGA, Rembrandt datasets. (F) Immunohistochemical detection of TUBB2B protein levels in glioma tissues and normal brain tissues (Scale bar, 200 μm). (G) Expression of TUBB2B in 8 normal tissues and 80 GBM tissues. (H) Kaplan Meier analysis was used to evaluate the overall survival of GBM patients based on TUBB2B expression (n = 64, **P = 0.0073). All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***
Fig. 1 TUBB2B is upregulated in GBM tissues. (A-B) Based on GEPIA database analysis, TUBB2B was significantly upregulated in LGG and GBM; P < 0.05. (C-E) Prognostic value of TUBB2B in TGGA, CGGA, Rembrandt datasets. (F) Immunohistochemical detection of TUBB2B protein levels in glioma tissues and normal brain tissues (Scale bar, 200 μm). (G) Expression of TUBB2B in 8 normal tissues and 80 GBM tissues. (H) Kaplan Meier analysis was used to evaluate the overall survival of GBM patients based on TUBB2B expression (n = 64, **P = 0.0073). All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***CC BY-NC-ND · PubMed Central
Fig. 2 Effect of TUBB2B knockdown and overexpression on the proliferation and migration of glioma cells. (A) Expression levels of TUBB2B in glioma cell lines and astrocyte cell lines. (B) Western blot analysis of TUBB2B expression. (C) Cell migration and invasion were assessed in GBM cells expressing TUBB2B shRNA using Transwell assay (Scale bar, 100 μm). (D) The cell migration ability of GBM cells expressing TUBB2B shRNA was detected by wound healing assay (Scale bar, 200 μm). (E) The efficiency of TUBB2B overexpression after transfection with TUBB2B OERNA were evaluated by qRT-PCR. (F) Western blot analysis of TUBB2B expression. (G) Cell migration and invasion were assessed in GBM cells expressing TUBB2B OERNA using Transwell assay (Scale bar, 100 μm). (H) The cell migration ability of GBM cells expressing TUBB2B OERNA was detected by wound healing assay (Scale bar, 200 μm). All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***; p < 0.0001, ****
Fig. 2 Effect of TUBB2B knockdown and overexpression on the proliferation and migration of glioma cells. (A) Expression levels of TUBB2B in glioma cell lines and astrocyte cell lines. (B) Western blot analysis of TUBB2B expression. (C) Cell migration and invasion were assessed in GBM cells expressing TUBB2B shRNA using Transwell assay (Scale bar, 100 μm). (D) The cell migration ability of GBM cells expressing TUBB2B shRNA was detected by wound healing assay (Scale bar, 200 μm). (E) The efficiency of TUBB2B overexpression after transfection with TUBB2B OERNA were evaluated by qRT-PCR. (F) Western blot analysis of TUBB2B expression. (G) Cell migration and invasion were assessed in GBM cells expressing TUBB2B OERNA using Transwell assay (Scale bar, 100 μm). (H) The cell migration ability of GBM cells expressing TUBB2B OERNA was detected by wound healing assay (Scale bar, 200 μm). All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***; p < 0.0001, ****CC BY-NC-ND · PubMed Central
Fig. 3 Transcriptome analysis of LN229 cell line. (A) KEGG enrichment analysis of the RNA-seq results. (B) GO enrichment analysis of the RNA-seq results. (C) The PPI network of TUBB2B and Vimentin (scorevalue ≥ 0.3). (D) RNA-seq expression of heatmaps of genes involved in extracellular matrix, focal adhesion, and cell migration
Fig. 3 Transcriptome analysis of LN229 cell line. (A) KEGG enrichment analysis of the RNA-seq results. (B) GO enrichment analysis of the RNA-seq results. (C) The PPI network of TUBB2B and Vimentin (scorevalue ≥ 0.3). (D) RNA-seq expression of heatmaps of genes involved in extracellular matrix, focal adhesion, and cell migrationCC BY-NC-ND · PubMed Central
Fig. 4 TUBB2B promotes EMT in GBM cells (A) The levels of EMT markers and TUBB2B in the LN229 and T98 cells. (B) Representative morphology of LN229 and T98 cells silenced for TUBB2B expression (Scale bar, 50 μm). (C) Representative images (20 × magnification) of immunofluorescence staining patterns for nucleus (DAPI, blue), Actin(green), and Tubulin (red) evaluated in control (NC) and shRNA cells (Scale bar, 20 μm)
Fig. 4 TUBB2B promotes EMT in GBM cells (A) The levels of EMT markers and TUBB2B in the LN229 and T98 cells. (B) Representative morphology of LN229 and T98 cells silenced for TUBB2B expression (Scale bar, 50 μm). (C) Representative images (20 × magnification) of immunofluorescence staining patterns for nucleus (DAPI, blue), Actin(green), and Tubulin (red) evaluated in control (NC) and shRNA cells (Scale bar, 20 μm)CC BY-NC-ND · PubMed Central
Fig. 5 TUBB2B interacts with Vimentin in GBM cells (A) STRING database protein interaction network of TUBB2B. (B) The interaction between TUBB2B and Vimentin inLN229 and T98 cells was determined using Co-IP. (C) Double staining of GBM cells with TUBB2B and Vimentin was assessed using confocal microscopy (Scale bar, 10 μm. Pearson’s R value = 0.60). (D) The predicted binding mode of TUBB2B and Vimentin, as well as the detail interactions between two proteins. (E) Schematic representation of Flag-TUBB2B-NC and the Flag-TUBB2B mutants. All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***; p < 0.0001, ****
Fig. 5 TUBB2B interacts with Vimentin in GBM cells (A) STRING database protein interaction network of TUBB2B. (B) The interaction between TUBB2B and Vimentin inLN229 and T98 cells was determined using Co-IP. (C) Double staining of GBM cells with TUBB2B and Vimentin was assessed using confocal microscopy (Scale bar, 10 μm. Pearson’s R value = 0.60). (D) The predicted binding mode of TUBB2B and Vimentin, as well as the detail interactions between two proteins. (E) Schematic representation of Flag-TUBB2B-NC and the Flag-TUBB2B mutants. All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***; p < 0.0001, ****CC BY-NC-ND · PubMed Central
Fig. 6 TUBB2B-Mut4 inhibits GBM cell migration and invasion in vivo. (A) Migration and invasion ability of TUBB2B-Mut4 in GBM cells (Scale bar, 10 μm). (B) The cell migration ability of GBM cells expressing TUBB2B-Mut4 was detected by wound healing assay (Scale bar, 10 μm). All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***
Fig. 6 TUBB2B-Mut4 inhibits GBM cell migration and invasion in vivo. (A) Migration and invasion ability of TUBB2B-Mut4 in GBM cells (Scale bar, 10 μm). (B) The cell migration ability of GBM cells expressing TUBB2B-Mut4 was detected by wound healing assay (Scale bar, 10 μm). All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **; p < 0.001, ***CC BY-NC-ND · PubMed Central
Fig. 7 Effect of tubb2b knockdown on GBM cell migration and invasion in vivo. (A) In vivo invasion assay for NC and ShTUBB2B LN229 cells (Scale bar = 200 μm). (B) Overall survival of mice. (C) IHC analysis of TUBB2B, Vimentin and N-cadherin levels in mice brain tumors (Scale bar, 50 μm). (D)Relative expression levels of TUBB2B, Vimentin and N-cadherin in IHC. All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **
Fig. 7 Effect of tubb2b knockdown on GBM cell migration and invasion in vivo. (A) In vivo invasion assay for NC and ShTUBB2B LN229 cells (Scale bar = 200 μm). (B) Overall survival of mice. (C) IHC analysis of TUBB2B, Vimentin and N-cadherin levels in mice brain tumors (Scale bar, 50 μm). (D)Relative expression levels of TUBB2B, Vimentin and N-cadherin in IHC. All results are displayed as the mean ± SD. p < 0.05, *; p < 0.01, **CC BY-NC-ND · PubMed Central

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Metadata

Authors
Li, J., Zhou, Z., Zhang, J., Wang, M., Luan, X., Zhao, M., Jiang, G., Wang, G., Li, S., Xiang, W., Chen, L., & Zhou, J.
Affiliations
Southwest Medical University (CN)
Corresponding author
  • Xiang, Wei
  • Chen, Ligang
  • Zhou, Jie
Venue
Cancer Cell International
Published
2024-12-20
Volume
24
Issue
1
Pages
423-423
ISSN
1475-2867 (ISSN-L)
OpenAlex
W4405636637
Cited by
8
References
1
Citations by year
2026: 6 · 2025: 2
FWCI
2.25
Type
journal article
Language
en
Open access
Locations
  • Cancer Cell International (publishedVersion, cc-by-nc-nd)
  • Research Square (acceptedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
Funders
  • The research was supported by National Natural Science Foundation project (82072780 and 82372825)
  • the Science and Technology Department of Sichuan Province (2022YFS0630)
  • the Sichuan Medical Youth Innovation Research Project (Q22044)
  • the Luzhou Science and Technology Program (2023JYJ028)
  • the University Science and Technology Strategic Cooperation Project (2024SNXNYD03)
Topics
  • Health Sciences › Medicine › Oncology › Glioma Diagnosis and Treatment
  • Health Sciences › Medicine › Oncology › Cancer Cells and Metastasis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
Keywords
TUBB2B, epithelial-mesenchymal transition, vimentin, glioblastoma, cell migration, tumor invasion, protein-protein interaction, microtubules, therapeutic target

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Li, J., Zhou, Z., Zhang, J., Wang, M., Luan, X., Zhao, M., Jiang, G., Wang, G., Li, S., Xiang, W., Chen, L., & Zhou, J. (2024). TUBB2B regulates epithelial-mesenchymal transition via interaction with Vimentin to promote glioma migration and invasion. Cancer Cell International. https://doi.org/10.1186/s12935-024-03618-5