Augmented expression of daintain/allograft inflammatory factor-1 is associated with clinical disease: dynamics of daintain/allograft inflammatory factor-1 expression in spleen, peripheral nerves and sera during experimental autoimmune neuritis.
Experimental autoimmune neuritis (EAN) is an animal model of Guillain-Barré syndrome, characterized by inflammation and demyelination of the peripheral nervous system (PNS). Daintain/allograft inflammatory factor-1 (daintain/AIF-1) is a novel interferon-gamma-inducible protein expressed by macrophages during organ specific autoimmune diseases. To study the involvement of daintain/AIF-1 in EAN we induced EAN in Lewis rats by immunizing with bovine PNS myelin (BPM) and complete Freund's adjuvant (CFA). The expression of daintain/AIF-1 was examined in the spleen, peripheral nerves and sera during the course of EAN by immunohistochemistry and radioimunoassay (RIA). The expression of daintain/AIF-1 in the spleen and in the sciatic nerves peaked at the preclinical stage (day 7 post immunization (p.i.)) and at the height (day 15 p.i.) of clinical EAN, consistent with a disease promoting role for daintain/AIF-1. Daintain/AIF-1 expressing cells represented a subset of ED1+ or CD11b/c+ mononuclear cells. A significant increase of daintain/AIF-1-like immunoreactivity in sera occurred at the preclinical stage of EAN. Taken together, these data indicate that daintain/AIF-1 may play a proinflammatory role in the pathogenesis of EAN.
Pashenkov
M
M
Division of Neurology, Huddinge University Hospital, Stockholm, Sweden.
Efendic
S
S
Zhu
J
J
Zou
L P
LP
Ostenson
C G
CG
Mustafa
M
M
D000818:Animals; D001327:Autoimmune Diseases / Q000209:etiology / Q000276:immunology* / Q000378:metabolism*; D002135:Calcium-Binding Proteins / Q000097:blood / Q000276:immunology* / Q000378:metabolism*; D002417:Cattle; D004268:DNA-Binding Proteins; D004195:Disease Models, Animal; D020275:Guillain-Barre Syndrome / Q000209:etiology / Q000276:immunology / Q000378:metabolism; D006801:Humans; D018836:Inflammation Mediators / Q000378:metabolism; D008264:Macrophages / Q000276:immunology / Q000378:metabolism / Q000473:pathology; D008840:Microfilament Proteins; D009443:Neuritis / Q000209:etiology / Q000276:immunology* / Q000378:metabolism*; D051381:Rats; D011917:Rats, Inbred Lew; D012584:Sciatic Nerve / Q000276:immunology / Q000378:metabolism / Q000473:pathology; D013154:Spleen / Q000276:immunology / Q000378:metabolism / Q000473:pathology
C112986:AIF1 protein, human; C100745:Aif1 protein, rat; D002135:Calcium-Binding Proteins; D004268:DNA-Binding Proteins; D018836:Inflammation Mediators; D008840:Microfilament Proteins