Abstract:
BACKGROUND:Dendritic cells (DC) are important in the development of acute graft-versus-host disease (GVHD) after allogeneic hemopoietic cell transplantation (alloHCT). The trafficking of immature DC from blood to GVHD target organs is likely to be regulated by chemokine receptors. METHODS:We performed flow cytometry to document the expression of chemokine receptors on circulating DC and correlated the findings after alloHCT with occurrence of acute GVHD. RESULTS:In normal individuals, plasmacytoid DC (pDC) expressed high levels of CCR5, whereas the major CD16 myeloid DC subpopulation lacked CCR5. However, its expression on CD16 cells was induced by culture in allogeneic mixed lymphocyte reaction supernatant, an effect largely mediated by interferon-γ. CCR5 was expressed on a significant proportion of CD16 DC in 42 alloHCT patients, whereas it was down-regulated on pDC. The maximum percentage of CCR5CD16 DC, at any time after transplantation, correlated with acute GVHD, whereas the minimum CCR5 on pDC showed a similar correlation. Before developing signs of GVHD, the maximum percentage CCR5CD16 DC was higher in patients with GVHD grades II to IV than in GVHD grades 0 and I, whereas the minimum percentage CCR5 on pDC was lower in GVHD grades II to IV than in GVHD grades 0 and I. CCR5 levels more than 20.5% on CD16 myeloid DC and less than 22.6% on CD123 pDC correlated with subsequent GVHD grades II to IV with high sensitivities and specificities. CONCLUSIONS:These observations may reflect DC activation and altered homing during the alloimmune response and could allow early diagnosis and therapeutic intervention before the clinical diagnosis of GVHD.
journal_name
Transplantationjournal_title
Transplantationauthors
Shahin K,Sartor M,Hart DN,Bradstock KFdoi
10.1097/TP.0b013e31829e6d5bsubject
Has Abstractpub_date
2013-10-27 00:00:00pages
753-62issue
8eissn
0041-1337issn
1534-6080journal_volume
96pub_type
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