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Paraproteinaemias: pathophysiology.

D Samson1

  • 1Imperial College School of Medicine, London, GB, UK. d.samson@ic.ac.uk

Schweizerische Medizinische Wochenschrift
|December 5, 2000
PubMed
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Multiple myeloma originates from specific B cells that home to bone marrow, where stromal cells promote their growth. Chromosome 13 deletions are key indicators of disease progression and prognosis in multiple myeloma.

Area of Science:

  • Hematology
  • Oncology
  • Immunology

Background:

  • Paraproteinaemias encompass benign and malignant plasma cell/lymphocyte disorders like multiple myeloma (MM), monoclonal gammopathy of undetermined significance (MGUS), and Waldenström's macroglobulinaemia.
  • Primary amyloidosis, often linked to MM or lymphoid malignancies, can be viewed as a form of MGUS where paraproteins cause damage via amyloidogenesis.
  • This review focuses on recent biological insights into multiple myeloma.

Purpose of the Study:

  • To discuss recent advances in understanding the biology of multiple myeloma.
  • To elucidate the cellular origins and microenvironmental interactions driving multiple myeloma.
  • To review the genetic abnormalities and their prognostic implications in multiple myeloma.

Main Methods:

Related Experiment Videos

  • Review of current literature on multiple myeloma biology.
  • Analysis of cellular origins, including B cell differentiation and bone marrow homing.
  • Examination of cell-cell interactions within the bone marrow microenvironment.
  • Investigation of genetic abnormalities, including cytogenetics and chromosomal translocations/deletions.

    • Main Results:

    • Multiple myeloma arises from post-germinal center B cells homing to the bone marrow, where stromal cell interactions (e.g., IL-6) promote growth.
    • Myeloma cells induce bone disease via osteoclast activation (TNF-alpha, IL-1 beta) and promote tumor growth via angiogenesis (VEGF).
    • Cytogenetic studies reveal near-universal abnormalities in MM, with 14q translocations common in MGUS, while chromosome 13 deletions are linked to MM progression and poor prognosis.

    Conclusions:

    • Multiple myeloma pathogenesis involves complex interactions between myeloma cells and the bone marrow microenvironment.
    • Kaposi's sarcoma-associated herpesvirus (HHV8) role in MM remains unclear due to conflicting study results.
    • Chromosome 13 deletions are significant indicators of disease progression and survival outcomes in multiple myeloma patients.