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Next-generation sequencing (NGS) reveals the complex genomic landscape of multiple myeloma (MM). This review details primary and secondary genetic events, including chromosomal abnormalities and mutations, crucial for understanding MM evolution.

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Area of Science:

  • Genomics
  • Cancer Biology
  • Hematology

Background:

  • Multiple myeloma (MM) is a complex hematologic malignancy characterized by genetic heterogeneity.
  • Recent advancements in next-generation sequencing (NGS) have revolutionized the study of cancer genomics.
  • Understanding the genetic underpinnings of MM is critical for developing targeted therapies.

Purpose of the Study:

  • To provide a comprehensive review of the genomic landscape in multiple myeloma.
  • To elucidate the primary and secondary genetic events driving MM development and progression.
  • To highlight the role of clonal heterogeneity in disease evolution.

Main Methods:

  • Review of current literature on multiple myeloma genomics.
  • Analysis of data from next-generation sequencing (NGS) studies, including whole exome, whole genome, and single-cell sequencing.
  • Integration of findings from genome-wide association studies (GWAS).

Main Results:

  • MM exhibits a complex genomic profile with distinct subtypes: hyperdiploid (HDR) and nonhyperdiploid (non-HDR).
  • HDR tumors are characterized by trisomies of specific chromosomes, while non-HDR tumors harbor IGH translocations.
  • Secondary events, such as MYC translocations, copy number variations (CNVs), and somatic mutations (e.g., KRAS, NRAS, BRAF, P53), contribute to tumor progression.
  • Inherited variants are implicated in familial MM cases.

Conclusions:

  • The genomic landscape of MM is intricate, involving a spectrum of primary and secondary genetic alterations.
  • NGS technologies have significantly advanced our understanding of MM's genetic complexity and evolution.
  • Further dissection of clonal heterogeneity and genomic alterations is essential for improving MM diagnosis and treatment strategies.