Blood dendritic cells in patients with chronic lymphocytic leukaemia.
Myeloid and plasmacytoid dendritic cells (MDC, PDC) play a key role in the initiation of immune responses. We found a reduction of both DC subsets in 42 patients with chronic lymphocytic leukaemia (CLL) at diagnosis (P<0.0001 and 0.0001 vs. controls, respectively), likely related to the high secretion of CCL22 and CXCL12 (P=0.04 and 0.008 vs. controls, respectively) by leukaemic cells. However, CD14+ monocytes from CLL patients could give rise to functional IL-12p70-secreting monocyte-derived DCs, capable of inducing a type 1 polarization immunostimulatory profile. These monocyte-derived DCs from CLL patients efficiently migrate in response to CCL19/MIP-3beta chemokine, suggesting that functional autologous DCs can be generated for immunotherapeutic purposes to circumvent DC defects in CLL.
Laboratoire d'Immunologie des Tumeurs, Institut Paoli-Calmettes, Université de la Méditerranée, 232 Bd. Ste. Marguerite, 13273 Marseille, Cedex 09, France.
Naira Ben
NB
Mami
Mohamad
M
Mohty
Thérèse
T
Aurran-Schleinitz
Daniel
D
Olive
Béatrice
B
Gaugler
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology* / Q000378:metabolism; D016207:Cytokines / Q000276:immunology / Q000378:metabolism*; D003713:Dendritic Cells / Q000276:immunology* / Q000378:metabolism; D005260:Female; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000276:immunology* / Q000378:metabolism; D016131:Lymphocyte Subsets / Q000276:immunology* / Q000378:metabolism; D008297:Male; D008875:Middle Aged
D016207:Cytokines