@phdthesis{Groh2013, author = {Groh, Janos Michael}, title = {Pathogenic impact of immune cells in mouse models of neuronal ceroid lipofuscinosis}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-77684}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2013}, abstract = {The neuronal ceroid lipofuscinoses (NCLs) are fatal neurodegenerative disorders in which the visual system is affected in early stages of disease. A typical accompanying feature is neuroinflammation, the pathogenic impact of which is presently unknown. In this study, the role of inflammatory cells in the pathogenesis was investigated in Palmitoyl-protein thioesterase 1-deficient (Ppt1-/-) and Ceroidlipofuscinosis, neuronal 3-deficient (Cln3-/-) mice, models of the infantile and juvenile forms of NCL, respectively. Focusing predominantly on the visual system, an infiltration of CD8+ cytotoxic Tlymphocytes and an activation of microglia/macrophage-like cells was observed early in disease. To analyze the pathogenic impact of lymphocytes, Ppt1-/- mice were crossbred with mice lacking lymphocytes (Rag1-/-) and axonal transport, perturbation and neuronal survival were scored. Lack of lymphocytes led to a significant amelioration of neuronal disease and reconstitution experiments revealed a crucial role of CD8+ cytotoxic T-lymphocytes. Lack of lymphocytes also caused an improved clinical phenotype and extended longevity. To investigate the impact of microglia/macrophage-like cells, Ppt1-/- and Cln3-/- mice were crossbred with mice lacking sialoadhesin (Sn-/-), a monocyte lineage-restricted cell adhesion molecule important for interactions between macrophage-like cells and lymphocytes. Similar to the lack of lymphocytes, absence of sialoadhesin significantly ameliorated the disease in Ppt1-/- and Cln3-/- mice. Taken together, both T-lymphocytes and microglia/macrophage-like cells were identified as pathogenic mediators in two distinct forms of fatal inherited neurodegenerative storage disorders. These studies expand the concept of secondary inflammation as a common pathomechanistic feature in some neurological diseases and provide novel insights that may be crucial for developing treatment strategies for different forms of NCL.}, subject = {Nervendegeneration}, language = {en} } @phdthesis{Rott2005, author = {Rott, Evelyn}, title = {Experimentelle autoimmune Enzephalomyelitis in beta2 Mikroglobulin knock-out M{\"a}usen : axonaler Schaden entsteht unabh{\"a}ngig von MHC-I Expression}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-19500}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2005}, abstract = {CD4 T-Zellen wurden lange als die vor allem pathogen wirkenden Immunzellen bei chronisch entz{\"u}ndlichen ZNS-Erkrankungen angesehen. Wir untersuchten die Wirkung von CD8 T-Zellen in der EAE (exp. autoimmunen Enzephalomyelitis = Tiermodell der Multiplen Sklerose) anhand von beta2-Mikroglobulin knock-out M{\"a}usen (fehlende CD8 T-Zellen). Ergebnis: im Vergleich zu den Wildtyptieren zeigten die Knock-outs eine signifikant st{\"a}rker ausgepr{\"a}gte Erkrankung bei der mit verschiedenen Antigenen (MOG, MBP) induzierten EAE mit erh{\"o}hter Mortalit{\"a}t. Histologisch fnad sich eine vermehrte Infiltration von Makrophagen und Mikroglia. Die Demyelinisierung war bei den Knock-outs st{\"a}rker ausgepr{\"a}gt, ebenso auch der axonale Schaden. Das Fehlen von funktionellen CD8 T-Zellen f{\"u}hrte demnach zu einer Verst{\"a}rkung der autoimmunen Gewebssch{\"a}digung im ZNS.}, language = {de} }