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July 18, 2002Blood

Clinical significance of phenotypic features of blasts in patients with myelodysplastic syndrome

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Authors

KOKíyoyuki OgataCenter for Cancer and Blood Disorders

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Overview

Observational study reveals immature blast immunophenotypes and CD7-linked poor prognosis in myelodysplastic syndrome, highlighting cellular markers for disease progression risk.

Key Points

  • To characterize the immunophenotypic profile of enriched blast cells in myelodysplastic syndrome and evaluate their association with disease subtype, progression, and clinical prognosis.
  • Enriched blast cells using a novel density centrifugation reagent from blood and bone marrow samples of 95 patients with myelodysplastic syndrome and 21 patients with transformed acute leukemia (N=116).
  • Analyzed surface antigen expression across myeloid, lymphoid, and stem cell markers using flow cytometry, along with cytochemical evaluation for myeloperoxidase.
  • Enriched blasts exhibited an immature committed myeloid precursor phenotype (CD34+CD38+HLA-DR+CD13+CD33+) across subtypes, with myeloperoxidase cytochemical negativity in 58% of cases.
  • Blasts from low-risk disease more frequently expressed myeloid maturation markers (CD10 and CD15), whereas high-risk and transformed disease predominantly expressed immaturity markers (CD7 and CD117).
  • Sequential testing showed a shift toward more immature phenotypes as disease advanced, and blast CD7 positivity was identified as an independent predictor of poor prognosis.

Cite This Study

Kíyoyuki Ogata (2002) studied this question.

synapsesocial.com/papers/69d847a57392c8ce61beeaechttps://doi.org/10.1182/blood-2002-01-0222
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