Gemcitabine: An Anticancer Drug
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Questions and Answers

What is the primary cytotoxic action of antitumor antibiotics?

  • Interference with RNA synthesis
  • Induction of cell cycle arrest
  • Inhibition of deoxycytidine kinase
  • Production of free radicals (correct)

How is Gemcitabine administered?

  • By IV infusion (correct)
  • Orally
  • Intramuscularly
  • Subcutaneously

What happens to Gemcitabine after deamination?

  • It becomes cytotoxic
  • It becomes a substrate for deoxycytidine kinase
  • It is excreted in feces
  • It is converted to difluorodeoxyuridine (correct)

Which enzyme phosphorylates Gemcitabine to 2′,2′-difluorodeoxycytidine triphosphate?

<p>Deoxycytidine kinase (C)</p> Signup and view all the answers

What is a notable adverse effect of Doxorubicin?

<p>Cardiac toxicity (C)</p> Signup and view all the answers

What is the significant impact of cumulative doses exceeding 450 mg/m2 with Doxorubicin?

<p>Increased risk of cardiotoxicity (A)</p> Signup and view all the answers

Which anthracycline is used in the treatment of prostate cancer?

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

What is a potential fatal side effect associated with 'Bleomycin'?

<p>Pulmonary Fibrosis (A)</p> Signup and view all the answers

How are anthracyclines like Doxorubicin administered?

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

What is a significant issue that can result from extravasation of anthracycline antibiotics?

<p>Tissue Necrosis (A)</p> Signup and view all the answers

Which of the following is NOT a mechanism of cytotoxicity induced by anthracyclines?

<p>Growth Inhibition (D)</p> Signup and view all the answers

'Cimetidine' is associated with which side effect among the following?

<p>Renal Toxicity (B)</p> Signup and view all the answers
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