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Exosome-derived miR-let-7c promotes angiogenesis in multiple myeloma by polarizing M2 macrophages in the bone marrow

Xiangyu Tian1, Miaomiao Sun2, Han Wu3

  • 1School of Basic Medical Sciences, Zhengzhou University, No. 100 Ke Xue Avenue, Zhengzhou, 450000, China; Department of Orthopedics, The First Affiliated Hospital of Zhengzhou University, No. 1 Jian She Dong Avenue, Zhengzhou, 450000, China; Henan Key Laboratory of Tumor Pathology, Zhengzhou University, No. 40 Da Xue Avenue, Zhengzhou, 450000, China.

Leukemia Research
|April 13, 2021
PubMed

Insights

Exosomes carrying miR-let-7c from mesenchymal stem cells promote M2 macrophage polarization, enhancing angiogenesis in multiple myeloma (MM). This suggests exosomal miR-let-7c as a potential biomarker and therapeutic target for MM.

Area of Science:

  • Oncology
  • Cell Biology
  • Biomedical Science

Background:

  • Angiogenesis is crucial in the multiple myeloma (MM) microenvironment, influencing tumor growth and spread.
  • Exosomes mediate cell-cell communication, regulating the bone marrow microenvironment.
  • Understanding exosome-mediated mechanisms is key to targeting MM progression.

Purpose of the Study:

  • To investigate the role of exosome-derived miR-let-7c in macrophage polarization and angiogenesis in MM.
  • To explore the potential of exosomal miR-let-7c as a biomarker and therapeutic target for MM.

Main Methods:

  • In vitro investigation of macrophage polarization and angiogenesis in MM.
  • Analysis of exosome-derived miR-let-7c secreted by mesenchymal stem cells.
  • Assessment of vascular endothelial cell function following miR-let-7c suppression.

Main Results:

  • Exosomal miR-let-7c promoted M2 macrophage polarization, enhancing angiogenesis in the MM bone marrow microenvironment.
  • Suppression of miR-let-7c significantly inhibited vascular endothelial cell function in myeloma.
  • Mesenchymal stem cell-derived exosomal miR-let-7c plays a significant role in MM progression.

Conclusions:

  • Exosomal miR-let-7c derived from mesenchymal stem cells is implicated in promoting M2 macrophage polarization and angiogenesis in MM.
  • Exosomal miR-let-7c shows promise as an early predictive biomarker for MM tumor progression.
  • Targeting exosomal miR-let-7c represents a potential therapeutic strategy for multiple myeloma.
Keywords:
AngiogenesisExosomeM2 macrophageMyelomamiR-let-7c

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