Evaluation of the prognostic relevance of L-selectin and ICAM1 expression in myelodysplastic syndromes.

Abstract:

OBJECTIVES:An aberrant pattern of expression of L-selectin and intercellular adhesion molecule 1 (ICAM1) may characterise CD34+ blast cells in myelodysplastic syndromes (MDS) and secondary acute myeloid leukaemia (sAML). METHODS:In a three-colour flow cytometric assay, we evaluated the expression of L-selectin and ICAM1 on CD34+ blast cells from the bone marrow (BM) of 66 MDS patients; for the purpose of comparison CD34+ blast cells of 18 sAML and CD34+ stem cells of 17 normal donors were also analysed. RESULTS:The ratio of L-selectin/ICAM1 expression was identified as a parameter correlated with the percentage of BM blast infiltration and the time to leukaemic progression among MDS patients. In fact, the values of L-selectin/ICAM1 ratio were inversely correlated with the BM blast infiltration (r = -0.34, P = 0.004). Furthermore, MDS patients with a baseline ratio <1 had a higher leukaemic progression rate (41% vs. 19%, P = 0.008); the actuarial risk of disease progression for this subgroup of MDS patients was also higher (64% vs. 11% at 2 yr, P = 0.002). Furthermore, in two patients a decrease of the ratio was observed when overt leukaemic transformation occurred; conversely, restoration of a normal ratio was observed in two patients after a chemotherapy-induced remission. CONCLUSION:(i) L-selectin is defective in the stem cell compartment of MDS and sAML, whereas ICAM1 is overexpressed; (ii) the ratio of their expression has a prognostic role; and (iii) a ratio <1 significantly predicts progression to overt leukaemia in MDS patients.

journal_name

Eur J Haematol

authors

Buccisano F,Maurillo L,Tamburini A,Del Poeta G,Del Principe MI,Ammatuna E,Consalvo MI,Campagna S,Ottaviani L,Sarlo C,Renzi D,Faccia S,Fraboni D,Lo Coco F,Amadori S,Venditti A

doi

10.1111/j.1600-0609.2007.00986.x

subject

Has Abstract

pub_date

2008-02-01 00:00:00

pages

107-14

issue

2

eissn

0902-4441

issn

1600-0609

pii

EJH986

journal_volume

80

pub_type

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