Clever-1/Stabilin-1 regulates lymphocyte migration within lymphatics and leukocyte entrance to sites of inflammation.
Clever-1/Stabilin-1 is a scavenger receptor present on lymphatic and sinusoidal endothelium as well as on a subset of type II macrophages. It is also induced on vasculature at sites of inflammation. However, its in vivo function has remained practically unknown and this work addresses those unknown aspects. We demonstrate using in vivo models that Clever-1/Stabilin-1 mediates migration of T and B lymphocytes to the draining lymph nodes in vivo and identify the adhesive epitope of the Clever-1/Stabilin-1 molecule responsible for the interaction between lymphocytes and lymphatic endothelium. Moreover, we demonstrate that Ab blocking of Clever-1/Stabilin-1 efficiently inhibits peritonitis in mice by decreasing the entrance of granulocytes by 50%, while migration of monocytes and lymphocytes into the inflamed peritoneum is prevented almost completely. Despite efficient anti-inflammatory activity the Ab therapy does not dramatically dampen immune responses against the bacterial and foreign protein Ag tested and bacterial clearance. These results indicate that anti-Clever-1/Stabilin-1 treatment can target two different arms of the vasculature--traffic via lymphatics and inflamed blood vessels.
Karikoski
Marika
M
MediCity and Department of Medical Microbiology and Immunology, University of Turku and National Institute of Health and Welfare, Turku, Finland.
Irjala
Heikki
H
Maksimow
Mikael
M
Miiluniemi
Mari
M
Granfors
Kaisa
K
Hernesniemi
Sari
S
Elima
Kati
K
Moldenhauer
Gerhard
G
Schledzewski
Kai
K
Kzhyshkowska
Julia
J
Goerdt
Sergij
S
Salmi
Marko
M
Jalkanen
Sirpa
S
D000818:Animals; D000906:Antibodies / Q000276:immunology / Q000494:pharmacology; D002448:Cell Adhesion; D015816:Cell Adhesion Molecules, Neuronal / Q000276:immunology / Q000378:metabolism*; D002465:Cell Movement; D004729:Endothelium, Lymphatic / Q000378:metabolism; D018604:Epitope Mapping; D005434:Flow Cytometry; D006801:Humans; D007249:Inflammation / Q000378:metabolism* / Q000473:pathology / Q000517:prevention & control; D007962:Leukocytes / Q000378:metabolism* / Q000473:pathology; D008198:Lymph Nodes / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D008208:Lymphatic System / Q000378:metabolism*; D008214:Lymphocytes / Q000187:drug effects / Q000378:metabolism* / Q000473:pathology; D051379:Mice; D008807:Mice, Inbred BALB C; D010538:Peritonitis / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control; D011817:Rabbits; D016201:Receptors, Lymphocyte Homing / Q000276:immunology / Q000378:metabolism; D013203:Staphylococcal Infections / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control
D000906:Antibodies; D015816:Cell Adhesion Molecules, Neuronal; D016201:Receptors, Lymphocyte Homing; C486732:Stab1 protein, mouse