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<p>Given the pivotal role of CDK4/6 deregulation in the pathogenesis of various malignancies, CDK4/6 inhibitors have been incorporated into cancer treatment protocols. Beyond their antiproliferative effects, these inhibitors exhibit prominent immunomodulatory properties. Preclinical data indicated that CDK4/6 inhibitors enhance the tumor cell antigen presentation capacity and restrict the proliferation of immunosuppressive regulatory T-cells. Furthermore, studies showed that CDK4/6 inhibitors could enhance the development of memory T-cell in vivo in melanoma mouse models and in the clinical setting in breast cancer (BC) patients. In silico analysis identified 225 protein targets for CDK4/6 inhibitors involved in 57 immune-related pathways which further supported the immune-modulatory potential of these inhibitors in innate immunity, cytokine signaling, and adaptive immunity. Furthermore, 24 targets exhibited significantly higher protein expression in immune cell types compared to non-immune cell types, as indicated by data from the Human Protein Atlas. The favorable modulation of T-cell immunity by CDK4/6 inhibitors could complement the antitumor effect of immunotherapies, such as immune checkpoint inhibitors (ICIs), which hamper PD-1 /PD-L1 signaling and result in the reactivation of the antitumor T-cell response. Herein, we explore the clinical portfolio of CDK4/6 inhibitors across various solid malignancies, with emphasis on emerging combinations with ICIs.</p>

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The landscape of cyclin-dependent kinase 4/6 inhibitors in solid malignancies: emphasis on immunotherapy combinatorial strategies

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月26日

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  • Sara A. Hussein,
  • Ahmed H. Saadawy,
  • Eman Badr,
  • Maha R. A. Abdollah,
  • Neamtullah Wael,
  • Rasha M. Allam,
  • Ahmed M. Al-Abd,
  • Ana Maria Roncero Sanchez,
  • Mai F. Tolba

摘要

Given the pivotal role of CDK4/6 deregulation in the pathogenesis of various malignancies, CDK4/6 inhibitors have been incorporated into cancer treatment protocols. Beyond their antiproliferative effects, these inhibitors exhibit prominent immunomodulatory properties. Preclinical data indicated that CDK4/6 inhibitors enhance the tumor cell antigen presentation capacity and restrict the proliferation of immunosuppressive regulatory T-cells. Furthermore, studies showed that CDK4/6 inhibitors could enhance the development of memory T-cell in vivo in melanoma mouse models and in the clinical setting in breast cancer (BC) patients. In silico analysis identified 225 protein targets for CDK4/6 inhibitors involved in 57 immune-related pathways which further supported the immune-modulatory potential of these inhibitors in innate immunity, cytokine signaling, and adaptive immunity. Furthermore, 24 targets exhibited significantly higher protein expression in immune cell types compared to non-immune cell types, as indicated by data from the Human Protein Atlas. The favorable modulation of T-cell immunity by CDK4/6 inhibitors could complement the antitumor effect of immunotherapies, such as immune checkpoint inhibitors (ICIs), which hamper PD-1 /PD-L1 signaling and result in the reactivation of the antitumor T-cell response. Herein, we explore the clinical portfolio of CDK4/6 inhibitors across various solid malignancies, with emphasis on emerging combinations with ICIs.