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shRNA‑mediated knockdown of KNTC1 inhibits non-small-cell lung cancer through regulating PSMB8

Ruijun Liu1, Ruili Liu2, Zhiyi Guo1

  • 1Shanghai Lung Tumor Clinical Medicine Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, 200030, P. R. China.

Cell Death & Disease
|August 6, 2022
PubMed

Insights

Kinetochore-associated 1 (KNTC1) protein is crucial for cell division and its reduction inhibits non-small-cell lung cancer (NSCLC) progression, proliferation, and migration, suggesting it as a potential therapeutic target.

Area of Science:

  • Molecular Biology
  • Oncology
  • Cell Biology

Background:

  • Kinetochore proteins are vital for mitosis and implicated in cancer development.
  • The role of Kinetochore-associated 1 (KNTC1) in non-small-cell lung cancer (NSCLC) is not well understood.
  • Understanding KNTC1's function could reveal new therapeutic strategies for NSCLC.

Purpose of the Study:

  • To investigate the biological significance of KNTC1 in non-small-cell lung cancer (NSCLC).
  • To determine the impact of KNTC1 depletion on NSCLC cell behavior and tumor formation.

Main Methods:

  • Immunohistochemistry was used to assess KNTC1 protein expression in NSCLC tissues.
  • Short hairpin RNA (shRNA) delivered via lentivirus was employed to silence KNTC1 in NSCLC cell lines.
  • Cell viability, proliferation, migration, apoptosis, and in vivo tumor formation were analyzed using various assays (MTT, wound-healing, Transwell, flow cytometry, xenograft models).

Main Results:

  • KNTC1 protein expression was evaluated in NSCLC tissues.
  • Depletion of KNTC1 significantly inhibited NSCLC cell viability, proliferation, migration, and invasion.
  • In vivo studies using a xenograft model confirmed that reduced KNTC1 restrains NSCLC tumorigenesis.
  • Downstream analysis revealed a positive correlation between KNTC1 depletion and PSMB8 expression.

Conclusions:

  • KNTC1 plays a significant role in the progression of non-small-cell lung cancer (NSCLC).
  • KNTC1 acts as a potential therapeutic target for NSCLC treatment.
  • Further research into KNTC1 and its downstream targets like PSMB8 may yield novel therapeutic avenues.

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