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Modulation of FDG Uptake by Cell Cycle Synchronization Using a T-Type Calcium Channel Inhibitor.

Joon-Kee Yoon1, Won Jun Kang2

  • 1Department of Nuclear Medicine and Molecular Imaging, Ajou University School of Medicine, Suwon 16499, Republic of Korea.

Cancers
|November 14, 2023
PubMed
Summary
This summary is machine-generated.

Mibefradil-induced cell cycle synchronization enhanced tumoral uptake of 2-[18F] fluoro-2-deoxy-d-glucose (FDG) in prostate cancer cells, improving diagnostic sensitivity in PET imaging.

Keywords:
FDG PETG1 arrestT-type calcium channel inhibitorcell cycle synchronizationmibefradil

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Area of Science:

  • Molecular Biology
  • Oncology
  • Radiopharmaceuticals

Background:

  • Investigated the effect of T-type calcium channel inhibitor mibefradil on cell cycle synchronization.
  • Assessed the potential of mibefradil-induced synchronization to enhance tumoral 2-[18F] fluoro-2-deoxy-d-glucose (FDG) uptake.
  • Explored implications for in vitro and in vivo cancer imaging.

Purpose of the Study:

  • To determine if mibefradil can synchronize cancer cells to increase FDG uptake.
  • To evaluate the correlation between cell cycle phases and glucose analog uptake.
  • To assess the in vivo efficacy of this approach using PET imaging.

Main Methods:

  • Prostate cancer cells (PC-3) were treated with mibefradil to induce G1 arrest.
  • Cell cycle distribution was analyzed post-mibefradil withdrawal.
  • Cellular uptake of [3H] Deoxy-d-Glucose (DDG) and in vivo FDG PET imaging were performed.

Main Results:

  • Mibefradil treatment significantly increased the G0/G1 cell fraction and later increased S phase fraction.
  • A 72-hour mibefradil treatment significantly increased [3H] DDG uptake, correlating positively with S phase.
  • In vivo FDG PET imaging showed a significant increase in tumor uptake after mibefradil treatment.

Conclusions:

  • Cell cycle synchronization using mibefradil can enhance tumoral FDG uptake.
  • This strategy holds promise for increasing the diagnostic sensitivity of clinical FDG PET imaging.