PMID- 10606893 OWN - NLM STAT- MEDLINE DCOM- 20000210 LR - 20190705 IS - 0007-1048 (Print) IS - 0007-1048 (Linking) VI - 107 IP - 4 DP - 1999 Dec TI - Phenotypic and functional characteristics of monocyte-derived dendritic cells from patients with myelodysplastic syndromes. PG - 844-50 AB - We have compared the phenotypic and functional characteristics of dendritic cells (DC) generated in vitro from the peripheral blood mononuclear fraction of myelodysplastic syndrome (MDS) patients (four refractory anaemia, four refractory anaemia with excess of blasts) with DCs generated in a similar way from eight healthy donors. After 10 d of culture in the presence of GM-CSF and IL-4, reduced numbers and percentages of DCs were obtained in MDS subjects. MDS DCs exhibited significantly lower expression of CD1a, CD54, CD80 and MHC class II molecules. Their ability to stimulate T lymphocytes in an allogeneic mixed leucocyte reaction was reduced in comparison to normal subjects. Furthermore, MDS DCs also showed a reduced receptor-mediated endocytosis as demonstrated by FITC-dextran uptake. Simultaneous fluorescence in situ hybridization (FISH) and immunophenotypic analysis demonstrated that MDS DCs have the same cytogenetic abnormality of the malignant clone. Taken together these findings indicate that, in MDS, DCs are part of the malignant clone and exhibit a deficient antigen uptake and presentation. FAU - Matteo Rigolin, G AU - Matteo Rigolin G AD - Department of Haematological Medicine, Guy's, King's and St Thomas' School of Medicine, London, U.K. FAU - Howard, J AU - Howard J FAU - Buggins, A AU - Buggins A FAU - Sneddon, C AU - Sneddon C FAU - Castoldi, G AU - Castoldi G FAU - Hirst, W J AU - Hirst WJ FAU - Mufti, G J AU - Mufti GJ LA - eng PT - Journal Article PL - England TA - Br J Haematol JT - British journal of haematology JID - 0372544 SB - IM MH - Dendritic Cells/*pathology MH - Endocytosis/physiology MH - Humans MH - Immunophenotyping MH - In Situ Hybridization, Fluorescence MH - Lymphocyte Culture Test, Mixed MH - Myelodysplastic Syndromes/*pathology MH - Phenotype EDAT- 1999/12/22 00:00 MHDA- 1999/12/22 00:01 CRDT- 1999/12/22 00:00 PHST- 1999/12/22 00:00 [pubmed] PHST- 1999/12/22 00:01 [medline] PHST- 1999/12/22 00:00 [entrez] AID - bjh1781 [pii] AID - 10.1046/j.1365-2141.1999.01781.x [doi] PST - ppublish SO - Br J Haematol. 1999 Dec;107(4):844-50. doi: 10.1046/j.1365-2141.1999.01781.x.