Exosomes at the crossroad between therapeutic targets and therapy resistance in head and neck squamous cell carcinoma

Biochim Biophys Acta Rev Cancer. 2022 Sep;1877(5):188784. doi: 10.1016/j.bbcan.2022.188784. Epub 2022 Aug 24.

Abstract

Head and neck squamous cell carcinomas (HNSCCs) are aggressive and clinically challenging tumours that require a multidisciplinary management approach. Despite significant therapy improvements, HNSCC patients have a poor prognosis with a 5-year survival rate of about 65%. As recently recognised key players in cancer, exosomes are extracellular vesicles (EVs) with a diameter of nearly 50-120 nm which transport information from one cell to another. Exosomes are actively involved in various aspects of tumour initiation, development, metastasis, immune regulation, therapy resistance, and therapeutic applications. However, current knowledge of the role of exosomes in the pathophysiological processes of HNSCC is still in its infancy, and additional studies are needed. In this review, we summarise and discuss the relevance of exosomes in mediating local immunosuppression and therapy resistance of HNSCC. We also review the most recent studies that have explored the therapeutic potential of exosomes as cancer vaccines, drug carriers or tools to reverse the drug resistance of HNSCC.

Keywords: Drug delivery; Exosomes; HNSCC; Head and neck cancer; Immune modulation; Immunotherapy; Therapy resistance; Vaccines.

Publication types

  • Review
  • Research Support, Non-U.S. Gov't
  • Research Support, N.I.H., Extramural

MeSH terms

  • Cancer Vaccines*
  • Drug Carriers
  • Exosomes* / pathology
  • Head and Neck Neoplasms* / drug therapy
  • Head and Neck Neoplasms* / genetics
  • Head and Neck Neoplasms* / pathology
  • Humans
  • Squamous Cell Carcinoma of Head and Neck / drug therapy

Substances

  • Cancer Vaccines
  • Drug Carriers