title: Neutrophils and B cells express XCR1 receptor and chemotactically respond to lymphotactin.
abstract: The C chemokine lymphotactin (Lptn) has been reported to act specifically on CD4(+) and CD8(+) T lymphocytes and natural killer (NK) cells, but not monocytes. However, the chemotactic effect of Lptn on other types of hematopoietic cells has not been well studied. In this study we investigated (i) the chemotactic influences of Lptn on T and B lymphocytes, neutrophils, monocytes, and dendritic cells, and (ii) the expression of the Lptn receptor (XCR1) by these cells, using RT-PCR. Our data showed that Lptn is chemotactic for B lymphocytes and neutrophils as well as T lymphocytes, but not for monocytes or dendritic cells, and that XCR1 expression is found only in association with T and B lymphocytes and neutrophils, but not monocytes or dendritic cells. Thus, this study is the first demonstration of a chemotactic effect of Lptn on neutrophils and confirms the association of this effect with expression of the XCR1 receptor on these cells. These data suggest that Lptn could potentially be an important protein in the regulation of T and B lymphocytes and neutrophil trafficking, and thereby also their roles in inflammatory and immunological responses.
authors.affiliation: Department of Microbiology, College of Medicine, Saskatoon Cancer Center, University of Saskatchewan, Saskatoon, Saskatchewan S7N 0W0, Canada.
authors.forename: H
authors.initials: H
authors.lastname: Huang
authors.forename: F
authors.initials: F
authors.lastname: Li
authors.forename: C M
authors.initials: CM
authors.lastname: Cairns
authors.forename: J R
authors.initials: JR
authors.lastname: Gordon
authors.forename: J
authors.initials: J
authors.lastname: Xiang
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D019744:Chemokines, C; D002630:Chemotactic Factors / Q000494:pharmacology; D002633:Chemotaxis / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D015870:Gene Expression; D008222:Lymphokines / Q000494:pharmacology*; D008565:Membrane Proteins; D051379:Mice; D008807:Mice, Inbred BALB C; D009504:Neutrophils / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051381:Rats; D011956:Receptors, Cell Surface / Q000235:genetics*; D043562:Receptors, G-Protein-Coupled; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012795:Sialoglycoproteins / Q000494:pharmacology*; D013601:T-Lymphocytes / Q000166:cytology / Q000187:drug effects / Q000378:metabolism
chemical_list: D019744:Chemokines, C; D002630:Chemotactic Factors; D008222:Lymphokines; D008565:Membrane Proteins; D012333:RNA, Messenger; D011956:Receptors, Cell Surface; D043562:Receptors, G-Protein-Coupled; D012795:Sialoglycoproteins; C092390:XCL1 protein, human; C091671:XCR1 protein, human; C486249:Xcl1 protein, mouse; C018997:lymphotactin