Cyclin-dependent kinase (CDK) inhibitors in solid tumors: a review of clinical trials

E Panagiotou1, G Gomatou2, I P Trontzas2

  • 1Oncology Unit, Sotiria General Hospital, Athens School of Medicine, 152 Mesogeion Avenue, 11527, Athens, Greece. em_panagiotou@outlook.com.

Insights

Cyclin-dependent kinase (CDK) inhibitors are revolutionizing cancer treatment. Newer, selective CDK inhibitors show promise in solid tumors, offering new therapeutic options and improved outcomes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Cyclin-dependent kinases (CDKs) are crucial regulators of the cell cycle, and their dysregulation is a hallmark of cancer, driving uncontrolled cell proliferation.
  • Early pan-CDK inhibitors faced challenges in clinical trials for solid tumors due to significant toxicity stemming from a lack of selectivity.
  • The development of selective CDK inhibitors, particularly CDK4/6 inhibitors, has transformed the treatment of hormone-receptor-positive metastatic breast cancer.

Purpose of the Study:

  • To review clinical trial data of CDK inhibitors in solid tumors.
  • To highlight novel CDK inhibitors and their therapeutic potential.
  • To explore potential new indications for CDK inhibitor-based therapies.

Main Methods:

  • Review of clinical trial data for CDK inhibitors in solid tumors.
  • Analysis of monotherapy and combination treatment regimens.
  • Focus on novel agents and emerging therapeutic strategies.

Main Results:

  • Selective CDK inhibitors, such as CDK4/6 inhibitors, have shown significant efficacy, particularly in HR+ metastatic breast cancer.
  • Trilaciclib has demonstrated benefits in mitigating chemotherapy-induced hematological toxicity in small cell lung cancer.
  • Newer agents like the selective CDK7 inhibitor SY-5609 show promising early clinical trial results.

Conclusions:

  • Selective CDK inhibitors represent a significant advancement in cancer therapy.
  • Ongoing research and development of novel CDK inhibitors are expanding treatment options for various solid tumors.
  • CDK inhibitors hold promise for new indications and improved patient outcomes in oncology.

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