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Vacuolar protein sorting 4B, an ATPase protein positively regulates the progression of NSCLC via promoting cell

Yifei Liu1, Liting Lv, Qun Xue

  • 1Department of Pathology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China.

Molecular and Cellular Biochemistry
|June 6, 2013
PubMed

Insights

Vacuolar protein sorting 4B (VPS4B) promotes non-small cell lung cancer (NSCLC) progression. High VPS4B expression correlates with advanced NSCLC and poor survival, suggesting it as a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Biology

Background:

  • Vacuolar protein sorting 4B (VPS4B) is an ATPase involved in lysosomal degradation.
  • VPS4B's role in cancer is debated, with conflicting reports on its function in breast cancer and cell division.

Purpose of the Study:

  • To investigate the clinical significance and functional role of VPS4B in non-small cell lung cancer (NSCLC).

Main Methods:

  • Western blot analysis of VPS4B expression in NSCLC tissues.
  • Immunohistochemistry on 105 NSCLC paraffin-embedded slices.
  • VPS4B knockdown in A549 NSCLC cells followed by proliferation assays (Western blot, CCK8, flow cytometry).

Main Results:

  • VPS4B was highly expressed in NSCLC tissues.
  • High VPS4B expression correlated with larger tumor size, poor histological differentiation, advanced clinical stage, and high Ki-67 index.
  • VPS4B expression was an independent prognostic factor for poor survival in NSCLC patients.
  • VPS4B knockdown inhibited NSCLC cell proliferation and cell cycle progression.

Conclusions:

  • VPS4B promotes NSCLC progression.
  • VPS4B may serve as a potential biomarker and therapeutic target for NSCLC.

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