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Exosome-mediated transduction of mechanical force regulates prostate cancer migration via microRNA

Zhixiao Liu1, Qishu Jin2, Taofei Yan3

  • 1Research Center of Developmental Biology, Department of Histology and Embryology, College of Basic Medicine, Naval Medical University, Shanghai, 200433, China.

Biochemistry and Biophysics Reports
|July 11, 2022
PubMed

Insights

Stiff environments trigger cancer cells to release exosomes containing microRNAs (miRNAs). These exosome-packaged miRNAs transmit mechanical signals, driving cancer cell metastasis by influencing motility and nerve interactions.

Area of Science:

  • Cell Biology
  • Cancer Research
  • Biophysics

Background:

  • Physical cues in the tumor microenvironment significantly influence cancer progression.
  • Exosomes, carrying functional microRNAs (miRNAs), are key mediators of intercellular communication.
  • The role of exosome-loaded miRNAs in mechanical force transmission between cancer cells and their microenvironment remains largely unexplored.

Purpose of the Study:

  • To investigate how extracellular matrix (ECM) mechanical forces regulate exosome miRNA cargo.
  • To elucidate the role of ECM-regulated exosome miRNAs in cancer cell metastasis.
  • To understand the mechanisms by which mechanical forces are transmitted via exosomes.

Main Methods:

  • Investigated the effect of ECM stiffness on prostate cancer cells and their secreted exosomes.
  • Analyzed miRNA content within exosomes under varying mechanical force conditions.
  • Assessed the impact of exosome miRNAs on cancer cell migration, ECM remodeling, and cancer-nerve interactions.
  • Examined the roles of focal adhesion kinase and F-actin in regulating intracellular miRNA expression and exosome packaging.

Main Results:

  • Stiff ECM induced exosomes that promote cancer cell migration.
  • ECM mechanical forces distinctly regulated the miRNA cargo of exosomes derived from prostate cancer cells.
  • Exosome miRNAs, modulated by ECM forces, influenced cancer cell motility, ECM remodeling, and cancer-nerve interactions.
  • Focal adhesion kinase mediated ECM force regulated intracellular miRNA expression, while F-actin mediated force regulated miRNA packaging into exosomes.

Conclusions:

  • Exosome miRNA cargo effectively transmits ECM mechanical force, thereby promoting cancer metastasis.
  • ECM mechanical forces play multifaceted roles in shaping the pro-metastatic microenvironment through exosome-mediated miRNA delivery.
Keywords:
Cancer metastasisExosomesExtracellular environment mechanical forcesMicroRNAProstate cancer

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