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Inflammatory profile of lower risk myelodysplastic syndromes

Joanne Topping1, Adele Taylor2, Fatima Nadat3

  • 1Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds, Leeds, UK.

British Journal of Haematology
|May 21, 2024
PubMed

Insights

Inflammasome specks, indicators of inflammation, are elevated in myelodysplastic syndromes (MDS). These findings suggest inflammation plays a role in MDS pathogenesis and progression, warranting further biomarker validation.

Area of Science:

  • Immunology
  • Hematology
  • Molecular Biology

Background:

  • The precise role of inflammation in myelodysplastic syndromes (MDS) pathogenesis remains unclear.
  • Inflammasomes, particularly the NLRP3 inflammasome, are key regulators of inflammatory responses.

Purpose of the Study:

  • To investigate the role of inflammasome activation in lower-risk MDS.
  • To characterize inflammatory markers in MDS patients compared to healthy controls and autoinflammatory disorders (AIDs).

Main Methods:

  • Development of a novel method to quantify ASC/NLRP3 protein specks, specific to the NLRP3 inflammasome.
  • Cytokine profiling of a large cohort of lower-risk MDS patients, healthy controls, and AIDs patients.

Main Results:

  • Significantly elevated ASC/NLRP3 specks in MDS patients compared to healthy controls (p < 0.001), comparable to AIDs patients.
  • Distinct distribution patterns of ASC-only specks suggest involvement of other ASC-containing inflammasomes in MDS.
  • Specific cytokine profiles observed in MDS subtypes, with lower levels of IL-1β, TNF, IL-23, IL-33, IFNγ, and IFNα2 in MDS-SLD.
  • Tumor necrosis factor (TNF) associated with MDS progression; IL-6 and IL-1β linked to red blood cell transfusion time.

Conclusions:

  • Inflammasome activation and specific inflammatory cytokines are implicated in MDS pathogenesis.
  • Inflammatory biomarkers show potential diagnostic and prognostic value in MDS, requiring further validation.
Keywords:
MDSNLRP3 inflammasomecytokinesinflammation

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