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Cytotoxic Efficacy of Photodynamic Therapy in Osteosarcoma Cells In Vitro
08:04

Cytotoxic Efficacy of Photodynamic Therapy in Osteosarcoma Cells In Vitro

Published on: March 18, 2014

Alpha-tocopheryl succinate alters cell cycle distribution sensitising human osteosarcoma cells to

Renata Alleva1, Maria Serena Benassi, Laura Pazzaglia

  • 1Department of Anesthesiology, IRCCS Istituti Ortopedici Rizzoli, Via Pupilli, 40136 Bologna, Italy. renalle@libero.it

Cancer Letters
|February 7, 2006
PubMed

Insights

Alpha-tocopheryl succinate (alpha-TOS) induces apoptosis in osteosarcoma cells with wild-type p53. This compound also causes cell cycle arrest, enhancing sensitivity to methotrexate treatment.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Alpha-tocopheryl succinate (alpha-TOS) exhibits diverse effects on cancer cells, including apoptosis induction and cell cycle regulation.
  • Osteosarcoma (OS) is a challenging bone cancer with varied genetic profiles, including p53 and pRB status.

Purpose of the Study:

  • To investigate the efficacy of alpha-TOS in inducing apoptosis and cell cycle arrest in human osteosarcoma cell lines.
  • To determine the influence of p53 and pRB gene status on OS cell response to alpha-TOS.

Main Methods:

  • Treatment of three human osteosarcoma cell lines with varying p53 and pRB statuses with alpha-TOS.
  • Assessment of apoptosis levels and cell cycle progression (S/G2 transition).
  • Evaluation of alpha-TOS's effect on methotrexate sensitivity.

Main Results:

  • High levels of apoptosis were observed in OS cells with wild-type p53 upon alpha-TOS exposure.
  • OS cells with mutant p53 showed resistance to alpha-TOS-induced apoptosis.
  • A S/G2 cell cycle arrest was induced by alpha-TOS in two OS cell lines.
  • Alpha-TOS sensitized these cell lines to methotrexate, a cell cycle-dependent chemotherapeutic agent.

Conclusions:

  • Alpha-TOS demonstrates differential efficacy against osteosarcoma cells based on p53 status.
  • Alpha-TOS can induce cell cycle arrest and enhance the effectiveness of methotrexate in osteosarcoma treatment.
  • Alpha-TOS holds potential as a therapeutic agent or adjuvant for osteosarcoma.

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