High-dose chemotherapy. Concepts and strategies

Area of Science:

• Oncology
• Pharmacology
• Cancer Therapeutics

Background:

• Chemosensitive malignancies exhibit steep dose-response curves in experimental models.
• Clinical observations indicate higher patient responses with increased conventional chemotherapy doses.

Purpose of the Study:

• To review factors and concepts related to the clinical use of high-dose chemotherapy.
• To explore strategies for enhancing chemotherapy efficacy and managing toxicity.

Main Methods:

• Review of existing literature on high-dose chemotherapy strategies.
• Analysis of dose-response relationships, drug scheduling, drug interactions, pharmacokinetics, and toxicity mitigation.

Main Results:

• High-dose chemotherapy can increase response rates but often leads to short response durations and no significant impact on survival.
• Autologous bone marrow transplant is a method to circumvent toxicity, introducing new dose-limiting toxicities.
• Drug resistance is multifactorial, with drug dose and concentration being key manipulable variables.

Conclusions:

• Increasing drug dose is a clinician-controlled variable crucial for enhancing cytotoxicity.
• High-dose chemotherapy may be most beneficial for consolidating drug-sensitive tumors with minimal residual disease.
• Continued exploration of high-dose chemotherapy is warranted, alongside a deeper understanding of drug resistance mechanisms.