Inhibition of multiple myeloma‑derived exosomes uptake suppresses the functional response in bone marrow stromal cell

  • Authors:
    • Yongjiang Zheng
    • Chenggong Tu
    • Jingwen Zhang
    • Jinheng Wang
  • View Affiliations

  • Published online on: January 11, 2019     https://doi.org/10.3892/ijo.2019.4685
  • Pages: 1061-1070
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

The communication between multiple myeloma (MM) cells and bone marrow stromal cells (BMSCs) serves a pivotal role in MM progression by supporting MM cell growth, proliferation and drug resistance. An exosomes‑based endogenous transport system has been determined as a novel mechanism of this communication by revealing the capacity for exchange of functional components between cells. An exosomes transfer‑mediated biological response in recipient cells is strongly determined by the detailed routes and mechanisms of exosomes internalization, which are diverse and can depend on surface molecules on the membrane of the vesicle and the recipient cell. Understanding the routes of exosomes uptake during MM cell‑BMSC communication is of great importance for the development of blocking strategies beneficial for MM treatment. In the present study, fluorescently‑labeled exosomes and pharmacological inhibitors, which are known to interfere with different internalization pathways, were used to characterize the cellular mechanisms involved in the uptake of MM cell‑derived exosomes by BMSCs. MM cell‑derived exosomes can promote BMSC viability and induce changes in multiple pro‑survival and pro‑proliferation pathways in BMSCs. As determined by flow cytometry and confocal microscopy, the uptake of MM cell‑derived exosomes proceeded primarily through endocytosis, via special caveolin‑dependent endocytosis, and partially through macropinocytosis and membrane fusion. Furthermore, treatment with endocytosis inhibitors suppressed the exosomes‑induced changes in pathways in BMSCs. Collectively, these results indicate that endocytosis is the primary route of internalization of MM cell‑derived exosomes by BMSCs and indicate that inhibition of exosomes uptake can interrupt the communication between MM cells and BMSCs and thus serve as a potential adjunctive strategy for MM treatment.
View Figures
View References

Related Articles

Journal Cover

March 2019
Volume 54 Issue 3

Print ISSN: 1019-6439
Online ISSN:1791-2423

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
APA
Zheng, Y., Tu, C., Zhang, J., & Wang, J. (2019). Inhibition of multiple myeloma‑derived exosomes uptake suppresses the functional response in bone marrow stromal cell. International Journal of Oncology, 54, 1061-1070. https://doi.org/10.3892/ijo.2019.4685
MLA
Zheng, Y., Tu, C., Zhang, J., Wang, J."Inhibition of multiple myeloma‑derived exosomes uptake suppresses the functional response in bone marrow stromal cell". International Journal of Oncology 54.3 (2019): 1061-1070.
Chicago
Zheng, Y., Tu, C., Zhang, J., Wang, J."Inhibition of multiple myeloma‑derived exosomes uptake suppresses the functional response in bone marrow stromal cell". International Journal of Oncology 54, no. 3 (2019): 1061-1070. https://doi.org/10.3892/ijo.2019.4685