Open Access

Cytoplasmic localization of SETDB1‑induced Warburg effect via c‑MYC‑LDHA axis enhances migration and invasion in breast carcinoma

  • Authors:
    • Wenlin Yang
    • Yingze Wei
    • Ting Wang
    • Ying Xu
    • Xiaoxia Jin
    • Hongyan Qian
    • Shuyun Yang
    • Song He
  • View Affiliations

  • Published online on: February 28, 2024     https://doi.org/10.3892/ijmm.2024.5364
  • Article Number: 40
  • Copyright: © Yang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

SET domain bifurcated 1 (SETDB1), a pivotal histone lysine methyltransferase, is transported to the cytoplasm via a chromosome region maintenance 1 (CMR1)‑dependent pathway, contributing to non‑histone methylation. However, the function and underlying mechanism of cytoplasmic SETDB1 in breast cancer remain elusive. In the present study, immunohistochemistry revealed that elevated cytoplasmic SETDB1 was correlated with lymph node metastasis and more aggressive breast cancer subtypes. Functionally, wound healing and Transwell assays showed that cytoplasmic SETDB1 is key for cell migration and invasion, as well as induction of epithelial‑mesenchymal transition (EMT), which was reversed by leptomycin B (LMB, a CMR1 inhibitor) treatment. Furthermore, RNA‑seq and metabolite detection revealed that cytoplasmic SETDB1 was associated with metabolism pathway and elevated levels of metabolites involved in the Warburg effect, including glucose, pyruvate, lactate and ATP. Immunoblotting and reverse transcription‑quantitative PCR verified that elevation of cytoplasmic SETDB1 contributed to elevation of c‑MYC expression and subsequent upregulation of lactate dehydrogenase A (LDHA) expression. Notably, gain‑ and loss‑of‑function approaches revealed that LDHA overexpression in T47D cells enhanced migration and invasion by inducing EMT, while its depletion in SETDB1‑overexpressing MCF7 cells reversed SETDB1‑induced migration and invasion, as well as the Warburg effect and EMT. In conclusion, subcellular localization of cytoplasmic SETDB1 may be a pivotal factor in breast cancer progression. The present study offers valuable insight into the novel functions and mechanisms of cytoplasmic SETDB1.
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April-2024
Volume 53 Issue 4

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Yang W, Wei Y, Wang T, Xu Y, Jin X, Qian H, Yang S and He S: Cytoplasmic localization of SETDB1‑induced Warburg effect via c‑MYC‑LDHA axis enhances migration and invasion in breast carcinoma. Int J Mol Med 53: 40, 2024
APA
Yang, W., Wei, Y., Wang, T., Xu, Y., Jin, X., Qian, H. ... He, S. (2024). Cytoplasmic localization of SETDB1‑induced Warburg effect via c‑MYC‑LDHA axis enhances migration and invasion in breast carcinoma. International Journal of Molecular Medicine, 53, 40. https://doi.org/10.3892/ijmm.2024.5364
MLA
Yang, W., Wei, Y., Wang, T., Xu, Y., Jin, X., Qian, H., Yang, S., He, S."Cytoplasmic localization of SETDB1‑induced Warburg effect via c‑MYC‑LDHA axis enhances migration and invasion in breast carcinoma". International Journal of Molecular Medicine 53.4 (2024): 40.
Chicago
Yang, W., Wei, Y., Wang, T., Xu, Y., Jin, X., Qian, H., Yang, S., He, S."Cytoplasmic localization of SETDB1‑induced Warburg effect via c‑MYC‑LDHA axis enhances migration and invasion in breast carcinoma". International Journal of Molecular Medicine 53, no. 4 (2024): 40. https://doi.org/10.3892/ijmm.2024.5364