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Malignant clonal evolution drives multiple myeloma cellular ecological diversity and microenvironment reprogramming.

Yuanzheng Liang1, Haiyan He2, Weida Wang3

  • 1Department of Hematology, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China.

Molecular Cancer
|September 21, 2022
PubMed
Summary

This study maps the bone marrow cell landscape in multiple myeloma (MM) using advanced sequencing. It reveals early mutations driving MM clonal evolution and highlights the interaction between tumor evolution and the microenvironment for personalized therapies.

Keywords:
Cell heterogeneityCellular ecological diversityMalignant clonal evolutionMicroenvironment reprogrammingMultiple myeloma

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Area of Science:

  • Oncology
  • Genomics
  • Immunology

Background:

  • Multiple myeloma (MM) is a complex blood cancer characterized by genetic heterogeneity and a challenging tumor microenvironment.
  • Understanding clonal evolution and polyclonality in MM is crucial for effective treatment strategies.

Purpose of the Study:

  • To establish a comprehensive cell ecological landscape of the bone marrow in MM patients.
  • To investigate the clonal evolution patterns and tumor microenvironment interactions at a single-cell level.

Main Methods:

  • Combined single-cell RNA sequencing and long-read genome sequencing of bone marrow samples from MM patients.
  • Analyzed malignant mutation events, clonal evolution models (Types I and IX), and tumor microenvironment interactions.

Main Results:

  • Identified ANK1 and IFITM2 mutations as early events in MM clonal origin.
  • Characterized two distinct MM clonal evolution models (Types I and IX) based on stemness and pseudo-sequential analysis.
  • Revealed an interactive relationship between clonal evolution and the tumor microenvironment, including immune cell modulation via vesicle secretion.

Conclusions:

  • Provides a single-cell level understanding of malignant clonal evolution in MM.
  • Offers a theoretical basis for personalized precision therapy in MM.
  • Suggests potential adjuvant strategies combining epigenetic agents and immune checkpoint blockade.