Advanced intercross line mapping suggests that ncf1 (ean6) regulates severity in an animal model of guillain-barre syndrome.
We here present the first genetic fine mapping of experimental autoimmune neuritis (EAN), the animal model of Guillain-Barré syndrome, in a rat advanced intercross line. We identified and refined a total of five quantitative trait loci on rat chromosomes 4, 10, and 12 (RNO4, RNO10, RNO12), showing linkage to splenic IFN-gamma secretion and disease severity. All quantitative trait loci were shared with other models of complex inflammatory diseases. The quantitative trait locus showing strongest linkage to clinical disease was Ean6 and spans 4.3 Mb on RNO12, harboring the neutrophil cytosolic factor 1 (Ncf1) among other genes. Polymorphisms in Ncf1, a member of the NADPH oxidase complex, have been associated with disease regulation in experimental arthritis and encephalomyelitis. We therefore tested the Ncf1 pathway by treating rats with a NADPH oxidase complex activator and ameliorated EAN compared the oil-treated control group. By proving the therapeutic effect of stimulating the NADPH oxidase complex, our data strongly suggest the first identification of a gene regulating peripheral nervous system inflammation. Taken together with previous reports, our findings suggest a general role of Ncf1 and oxidative burst in pathogenesis of experimental autoimmune animal models.
Huberle
Alexander
A
Hertie Institute for Clinical Brain Research, University of Tübingen, Germany.
Beyeen
Amennai Daniel
AD
Ockinger
Johan
J
Ayturan
Miriam
M
Jagodic
Maja
M
de Graaf
Katrien L
KL
Fissolo
Nicolas
N
Marta
Monica
M
Olofsson
Peter
P
Hultqvist
Malin
M
Holmdahl
Rikard
R
Olsson
Tomas
T
Weissert
Robert
R
D000818:Animals; D001323:Autoantibodies / Q000097:blood / Q000276:immunology; D001324:Autoantigens / Q000276:immunology; D002874:Chromosome Mapping; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D008040:Genetic Linkage; D005838:Genotype; D020275:Guillain-Barre Syndrome / Q000235:genetics / Q000276:immunology / Q000473:pathology; D007371:Interferon-gamma / Q000276:immunology / Q000378:metabolism; D008297:Male; D009097:Multienzyme Complexes / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D009247:NADH, NADPH Oxidoreductases / Q000235:genetics / Q000276:immunology / Q000378:metabolism; D019255:NADPH Oxidases / Q000235:genetics*; D009444:Neuritis, Autoimmune, Experimental / Q000235:genetics* / Q000276:immunology / Q000473:pathology*; D010836:Phytol / Q000494:pharmacology; D011110:Polymorphism, Genetic; D040641:Quantitative Trait Loci; D051381:Rats; D016897:Respiratory Burst / Q000502:physiology
D001323:Autoantibodies; D001324:Autoantigens; D009097:Multienzyme Complexes; D010836:Phytol; D007371:Interferon-gamma; C023107:NADH oxidase; D009247:NADH, NADPH Oxidoreductases; D019255:NADPH Oxidases; C060505:neutrophil cytosolic factor 1