Pharmacokinetics of Nitrosoureas and Temozolomide in Cancer Treatment
29 Questions
2 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary route of excretion for the nitrosoureas?

  • Kidney (correct)
  • Lungs
  • Skin
  • Liver

Which alkylating agent undergoes biotransformation to form methyltriazenoimidazole carboxamide (MTIC)?

  • Carmustine
  • Dacarbazine (correct)
  • Temozolomide
  • Lomustine

What is the primary mechanism of cytotoxic action of dacarbazine's metabolite?

  • Formation of DNA cross-links
  • Inhibition of DNA synthesis
  • Inhibition of RNA polymerase
  • Methylation of DNA on the O-6 position of guanine (correct)

What is a unique characteristic of temozolomide compared to dacarbazine?

<p>It undergoes chemical transformation at normal physiological pH (A)</p> Signup and view all the answers

Which of the following agents is NOT administered orally?

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

What is the target of temozolomide's inhibition, in addition to its effects on DNA methylation?

<p>O-6-guanine-DNA alkyltransferase (D)</p> Signup and view all the answers

What is the primary mechanism of action of topoisomerase inhibitors?

<p>Inhibition of topoisomerase I (A)</p> Signup and view all the answers

Which of the following is NOT a common adverse effect of topoisomerase inhibitors?

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

What is the primary indication for the use of topotecan?

<p>Metastatic ovarian cancer (A)</p> Signup and view all the answers

What is the approximate potency of SN-38 relative to irinotecan as an inhibitor of topoisomerase I?

<p>1000 times (B)</p> Signup and view all the answers

Why is frequent blood count monitoring necessary for patients receiving topotecan?

<p>To monitor for bone marrow suppression (C)</p> Signup and view all the answers

What is the primary difference in the mechanism of action of topoisomerase I and topoisomerase II inhibitors?

<p>Topoisomerase I inhibitors cause single-strand breaks (D)</p> Signup and view all the answers

What is the primary route of administration for etoposide?

<p>Intravenous and oral (B)</p> Signup and view all the answers

What is the primary mechanism of action of etoposide?

<p>Inhibition of topoisomerase II (B)</p> Signup and view all the answers

What is the primary toxicity associated with etoposide?

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

What is the indication for using atropine during irinotecan infusion?

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

What is the target of monoclonal antibodies in anticancer therapy?

<p>Specific targets (B)</p> Signup and view all the answers

What is the family of enzymes involved in signal transduction and cell division?

<p>Tyrosine kinase (B)</p> Signup and view all the answers

What is the mechanism by which proteasome inhibitors promote programmed cell death?

<p>By inhibiting the degradation of proapoptotic factors (C)</p> Signup and view all the answers

Why is the subcutaneous route preferred for administering bortezomib?

<p>It is associated with less neuropathy (B)</p> Signup and view all the answers

What is a common adverse effect of carfilzomib and bortezomib?

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

Which proteasome inhibitor is administered orally?

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

Why should patients receive antiviral prophylaxis when taking bortezomib?

<p>To prevent herpes zoster reactivation (A)</p> Signup and view all the answers

What is the primary purpose of coadministering prednisone with abiraterone acetate?

<p>To counteract the effects of mineralocorticoid excess (B)</p> Signup and view all the answers

What is a common adverse effect associated with immuno-modulating agents such as thalidomide, lenalidomide, and pomalidomide?

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

What is the mechanism of action of proteasome inhibitors such as bortezomib, ixazomib, and carfilzomib?

<p>Inhibition of proteasome function (C)</p> Signup and view all the answers

Why are lenalidomide and pomalidomide contraindicated in pregnancy?

<p>Due to their structural similarities to thalidomide (A)</p> Signup and view all the answers

What is a potential adverse effect of abiraterone acetate?

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

What is the primary indication for the use of immuno-modulating agents such as thalidomide, lenalidomide, and pomalidomide?

<p>Treatment of multiple myeloma (C)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Browser