PMID- 15643009 OWN - NLM STAT- MEDLINE DCOM- 20050616 LR - 20181113 IS - 1071-412X (Print) IS - 1098-6588 (Electronic) IS - 1071-412X (Linking) VI - 12 IP - 1 DP - 2005 Jan TI - Differentiation, maturation, and survival of dendritic cells by osteopontin regulation. PG - 206-12 AB - Dendritic cells (DCs) are antigen-presenting cells with the ability to induce primary immune responses necessary in innate immunity and adaptive immunity. Osteopontin (OPN) is a secreted acidic phosphoprotein containing an arginine-glycine-aspartate sequence and has been suggested to play an important role in early cellular immune responses. The interaction between DCs and OPN has not been clarified. We hypothesized that there is an important interaction between DCs and OPN, which is an indispensable extracellular matrix component in early cellular immune responses. Human monocyte-derived DCs synthesized OPN especially during the differentiation from monocytes to immature DCs. By blocking of OPN with anti-OPN antibody, cultured DCs became smaller and expressed lower levels of costimulatory molecules and major histocompatibility complex class II antigens than untreated DCs. Furthermore, DCs treated with anti-OPN antibody easily underwent apoptosis. These results suggest that human DCs can produce OPN and that OPN may play a role in the differentiation, maturation, and survival of DCs by autocrine and/or paracrine pathways. FAU - Kawamura, Kodai AU - Kawamura K AD - Department of Respiratory Medicine, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan. FAU - Iyonaga, Kazuhiro AU - Iyonaga K FAU - Ichiyasu, Hidenori AU - Ichiyasu H FAU - Nagano, Junji AU - Nagano J FAU - Suga, Moritaka AU - Suga M FAU - Sasaki, Yutaka AU - Sasaki Y LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Clin Diagn Lab Immunol JT - Clinical and diagnostic laboratory immunology JID - 9421292 RN - 0 (SPP1 protein, human) RN - 0 (Sialoglycoproteins) RN - 106441-73-0 (Osteopontin) SB - IM MH - Apoptosis/physiology MH - Cell Differentiation/*physiology MH - Cell Survival/physiology MH - Dendritic Cells/*cytology/*metabolism MH - Flow Cytometry MH - Humans MH - Monocytes/cytology/metabolism MH - Osteopontin MH - Sialoglycoproteins/*metabolism MH - Stem Cells/cytology/metabolism PMC - PMC540203 EDAT- 2005/01/12 09:00 MHDA- 2005/06/17 09:00 PMCR- 2005/01/01 CRDT- 2005/01/12 09:00 PHST- 2005/01/12 09:00 [pubmed] PHST- 2005/06/17 09:00 [medline] PHST- 2005/01/12 09:00 [entrez] PHST- 2005/01/01 00:00 [pmc-release] AID - 12/1/206 [pii] AID - 0172-04 [pii] AID - 10.1128/CDLI.12.1.206-212.2005 [doi] PST - ppublish SO - Clin Diagn Lab Immunol. 2005 Jan;12(1):206-12. doi: 10.1128/CDLI.12.1.206-212.2005.