PMID- 18714538 OWN - NLM STAT- MEDLINE DCOM- 20081006 LR - 20171116 IS - 1018-9068 (Print) IS - 1018-9068 (Linking) VI - 18 IP - 4 DP - 2008 TI - Activation of basophils by stem cell factor: comparison with insulin-like growth factor-I. PG - 293-9 AB - BACKGROUND: Basophils are an active participant in the pathogenesis of local inflammation in allergic diseases such as asthma, but it is not fully known how basophil activation is regulated in inflamed tissue. OBJECTIVE: In order to clarify the control mechanisms of basophil activation in chronic inflammation and at remodeling sites, we analyzed the effects of fibroblast-derived cytokines, stem cell factor (SCF), and insulin-like growth factor-I (IGF-I) on basophils. METHODS: The effects of SCF and IGF-I on degranulation and surface activation marker expression by basophils were assessed and compared. RESULTS: SCF enhanced human basophil histamine release elicited by some, but not all, secretagogues; degranulation in response to IgE- or FcepsilonRI-mediated stimulation and 12-o-tetradecanoyl-phorbol-13-acetate (TPA) was enhanced by SCF. SCF slightly enhanced ionophore A23187-induced histamine release by basophils from some donors, but it failed to affect the release elicited by monocyte chemoattractant protein-1 (MCP-1), formylmethionyl-leucyl-phenylalanine (FMLP) or C5a. The repertoire of secretagogues responsive to SCF was similar to that of IGF-I. Expression levels of both CD11b and CD69 markers were significantly enhanced by the combination of SCF and IGF-I. CONCLUSIONS: These results suggest that SCF and IGF-I may modify the activation of basophils in a similar and/or synergistic fashion. Interaction of basophils with these cytokines might be involved in the pathogenesis of local inflammation and the remodeling process in asthma. FAU - Koketsu, R AU - Koketsu R AD - Department of Allergy and Rheumatology, University of Tokyo Graduate School of Medicine, Tokyo, Japan. FAU - Suzukawa, M AU - Suzukawa M FAU - Kawakami, A AU - Kawakami A FAU - Komiya, A AU - Komiya A FAU - Ra, C AU - Ra C FAU - Yamamoto, K AU - Yamamoto K FAU - Yamaguchi, M AU - Yamaguchi M LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Spain TA - J Investig Allergol Clin Immunol JT - Journal of investigational allergology & clinical immunology JID - 9107858 RN - 0 (Antigens, CD) RN - 0 (Antigens, Differentiation, T-Lymphocyte) RN - 0 (CD11b Antigen) RN - 0 (CD69 antigen) RN - 0 (Lectins, C-Type) RN - 0 (Recombinant Proteins) RN - 0 (Stem Cell Factor) RN - 67763-96-6 (Insulin-Like Growth Factor I) SB - IM MH - Antigens, CD/immunology/*metabolism MH - Antigens, Differentiation, T-Lymphocyte/immunology/*metabolism MH - Basophils/drug effects/*immunology/metabolism MH - CD11b Antigen/drug effects/immunology/*metabolism MH - Cell Degranulation/*drug effects MH - Histamine Release/*drug effects MH - Humans MH - Insulin-Like Growth Factor I/immunology/*pharmacology MH - Lectins, C-Type MH - Recombinant Proteins/pharmacology MH - Stem Cell Factor/immunology/*pharmacology EDAT- 2008/08/22 09:00 MHDA- 2008/10/07 09:00 CRDT- 2008/08/22 09:00 PHST- 2008/08/22 09:00 [pubmed] PHST- 2008/10/07 09:00 [medline] PHST- 2008/08/22 09:00 [entrez] PST - ppublish SO - J Investig Allergol Clin Immunol. 2008;18(4):293-9.