Radiosensitizing Effect of TRPV1 Channel Inhibitors in Cancer Cells

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Questions and Answers

What was the primary objective of this study?

  • To examine the role of DNA damage response in cancer treatment
  • To explore the radiosensitizing effect of TRPV1 channel inhibitors in cancer cells (correct)
  • To investigate the effect of TRPV1 channel inhibitors on cell growth
  • To analyze the effect of γ-rays on cell membranes

What was the outcome of using TRPV1 channel inhibitors in cancer cells?

  • They suppressed radiation-induced reproductive death
  • They had no significant effect on cancer cells
  • They suppressed DNA damage response and enhanced radiation-induced reproductive death (correct)
  • They enhanced DNA damage response

What type of cells were used in the study?

  • Human breast cancer cells
  • Mouse lung cancer cells
  • Human skin cancer cells
  • A549 human lung adenocarcinoma cells and B16 mouse melanoma cells (correct)

What was the purpose of irradiating the cells with γ-rays?

<p>To induce DNA damage response (D)</p> Signup and view all the answers

What was the dose of γ-rays used in the study?

<p>2.0 Gy (D)</p> Signup and view all the answers

What was the duration of incubation after irradiation?

<p>30 min (A)</p> Signup and view all the answers

What is the primary goal of using radiosensitizers in cancer therapy?

<p>To reduce damage to adjacent normal tissues during radiotherapy (C)</p> Signup and view all the answers

What is the target of radiosensitizers in cancer therapy?

<p>DNA damage repair systems (D)</p> Signup and view all the answers

What type of nanoparticles are being researched as radiosensitizers to improve the efficacy of cancer radiotherapy?

<p>Gold nanoparticles (B)</p> Signup and view all the answers

What is the primary issue with using fractionated-dose irradiation in cancer treatment?

<p>DNA repair during inter-fraction intervals (C)</p> Signup and view all the answers

What is the role of the TRPV1 channel in response to DNA damage after γ-irradiation?

<p>It is involved in the early responses to DNA damage (D)</p> Signup and view all the answers

Why were TRPV1 channel inhibitors hypothesized to have a radiosensitizing effect?

<p>Because they can block the repair of radiation-induced cell damage (D)</p> Signup and view all the answers

What is the function of the TRPV1 channel in cells?

<p>A non-selective cation channel and pain receptor (C)</p> Signup and view all the answers

What is the potential effect of TRPV1 channel inhibitors on cancer cells?

<p>They increase the susceptibility of cancer cells to γ-irradiation (C)</p> Signup and view all the answers

What is the role of ATM in the early response to radiation-induced DNA damage?

<p>Inducing phosphorylation of H2AX at DNA damage sites (B)</p> Signup and view all the answers

What type of cancer cells are often targeted by radiosensitizers?

<p>Radioresistant hypoxic cancer cells (B)</p> Signup and view all the answers

What is the purpose of using radiosensitizers in cancer treatment?

<p>To increase the effectiveness of radiation therapy (B)</p> Signup and view all the answers

What is the result of hypoxia in solid cancer cells?

<p>Decreased susceptibility to radiation (B)</p> Signup and view all the answers

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