PMID- 10989961 OWN - NLM STAT- MEDLINE DCOM- 20010104 LR - 20041117 IS - 0753-3322 (Print) IS - 0753-3322 (Linking) VI - 54 IP - 6 DP - 2000 Jul TI - Dysfunctional regulation of the development of monocyte-derived dendritic cells in cancer patients. PG - 291-8 AB - Dendritic cells (DCs) are highly effective antigen (Ag)-presenting cells (APCs) that are required for the initiation of the immune response. DCs derived from cancer patients have been shown to be defective in several phenotypic and functional properties. However, little is known about the capacity of monocytes derived from cancer patients to differentiate into DCs. Herein, we examined the differentiation of monocyte-derived DCs in cancer patients. Flow cytometric analysis revealed that monocytes derived from cancer patients cultured with granulocyte-macrophage colony-stimulating factor (GM-CSF) plus interleukin-4 (IL-4) exhibited lower levels of CD11c, CD40, CD86, and HLA-DR expression as compared with those of monocyte-derived DCs from healthy volunteers. Furthermore, the capacities of DCs derived from cancer patients' monocytes to stimulate allogeneic T cell responses and to migrate in response to regulated-on-activation normal T cells expressed and secreted (RANTES) were impaired in comparison with those of monocyte-derived DCs from healthy volunteers. However, the two cell types had similar pinocytotic capacities for fluorescein isothiocyanate labeled-dextran (FITC-DX) and lucifer yellow (LY). These results suggest that monocytes from cancer patients may be defective in the capacity to develop into DCs. FAU - Hasebe, H AU - Hasebe H AD - Department of Surgery, The Institute of Medical Science. The University of Tokyo, Japan. FAU - Nagayama, H AU - Nagayama H FAU - Sato, K AU - Sato K FAU - Enomoto, M AU - Enomoto M FAU - Takeda, Y AU - Takeda Y FAU - Takahashi, T A AU - Takahashi TA FAU - Hasumi, K AU - Hasumi K FAU - Eriguchi, M AU - Eriguchi M LA - eng PT - Journal Article PL - France TA - Biomed Pharmacother JT - Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie JID - 8213295 RN - 0 (Antigens, CD) RN - 0 (HLA-DR Antigens) SB - IM MH - Aged MH - Antigens, CD/analysis MH - Cell Differentiation MH - Dendritic Cells/*physiology MH - Endocytosis MH - Female MH - HLA-DR Antigens/analysis MH - Humans MH - Male MH - Middle Aged MH - Monocytes/*physiology MH - Neoplasms/*immunology MH - T-Lymphocytes/immunology MH - Vaccination EDAT- 2000/09/16 11:00 MHDA- 2001/02/28 10:01 CRDT- 2000/09/16 11:00 PHST- 2000/09/16 11:00 [pubmed] PHST- 2001/02/28 10:01 [medline] PHST- 2000/09/16 11:00 [entrez] AID - S0753-3322(00)80050-5 [pii] AID - 10.1016/S0753-3322(00)80050-5 [doi] PST - ppublish SO - Biomed Pharmacother. 2000 Jul;54(6):291-8. doi: 10.1016/S0753-3322(00)80050-5.