@article{ArndtHoffackerZellmeretal.2014, author = {Arndt, Andreas and Hoffacker, Peter and Zellmer, Konstantin and Goecer, Oktay and Recks, Mascha S. and Kuerten, Stefanie}, title = {Conventional Housing Conditions Attenuate the Development of Experimental Autoimmune Encephalomyelitis}, series = {PLoS ONE}, volume = {9}, journal = {PLoS ONE}, number = {6}, doi = {10.1371/journal.pone.0099794}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-119603}, pages = {e99794}, year = {2014}, abstract = {BACKGROUND: The etiology of multiple sclerosis (MS) has remained unclear, but a causative contribution of factors outside the central nervous system (CNS) is conceivable. It was recently suggested that gut bacteria trigger the activation of CNS-reactive T cells and the development of demyelinative disease. METHODS: C57BL/6 (B6) mice were kept either under specific pathogen free or conventional housing conditions, immunized with the myelin basic protein (MBP)-proteolipid protein (PLP) fusion protein MP4 and the development of EAE was clinically monitored. The germinal center size of the Peyer's patches was determined by immunohistochemistry in addition to the level of total IgG secretion which was assessed by ELISPOT. ELISPOT assays were also used to measure MP4-specific T cell and B cell responses in the Peyer's patches and the spleen. Ear swelling assays were performed to determine the extent of delayed-type hypersensitivity reactions in specific pathogen free and conventionally housed mice. RESULTS: In B6 mice that were actively immunized with MP4 and kept under conventional housing conditions clinical disease was significantly attenuated compared to specific pathogen free mice. Conventionally housed mice displayed increased levels of IgG secretion in the Peyer's patches, while the germinal center formation in the gut and the MP4-specific TH17 response in the spleen were diminished after immunization. Accordingly, these mice displayed an attenuated delayed type hypersensitivity (DTH) reaction in ear swelling assays. CONCLUSIONS: The data corroborate the notion that housing conditions play a substantial role in the induction of murine EAE and suggest that the presence of gut bacteria might be associated with a decreased immune response to antigens of lower affinity. This concept could be of importance for MS and calls for caution when considering the therapeutic approach to treat patients with antibiotics."}, language = {en} } @article{AdelfingerGentschevdeGuibertetal.2014, author = {Adelfinger, Marion and Gentschev, Ivaylo and de Guibert, Julio Grimm and Weibel, Stephanie and Langbein-Laugwitz, Johanna and H{\"a}rtl, Barbara and Escobar, Hugo Murua and Nolte, Ingo and Chen, Nanhai G. and Aguilar, Richard J. and Yu, Yong A. and Zhang, Qian and Frentzen, Alexa and Szalay, Aladar A.}, title = {Evaluation of a New Recombinant Oncolytic Vaccinia Virus Strain GLV-5b451 for Feline Mammary Carcinoma Therapy}, series = {PLoS ONE}, volume = {9}, journal = {PLoS ONE}, number = {8}, doi = {10.1371/journal.pone.0104337}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-119387}, pages = {e104337}, year = {2014}, abstract = {Virotherapy on the basis of oncolytic vaccinia virus (VACV) infection is a promising approach for cancer therapy. In this study we describe the establishment of a new preclinical model of feline mammary carcinoma (FMC) using a recently established cancer cell line, DT09/06. In addition, we evaluated a recombinant vaccinia virus strain, GLV-5b451, expressing the anti-vascular endothelial growth factor (VEGF) single-chain antibody (scAb) GLAF-2 as an oncolytic agent against FMC. Cell culture data demonstrate that GLV-5b451 virus efficiently infected, replicated in and destroyed DT09/06 cancer cells. In the selected xenografts of FMC, a single systemic administration of GLV-5b451 led to significant inhibition of tumor growth in comparison to untreated tumor-bearing mice. Furthermore, tumor-specific virus infection led to overproduction of functional scAb GLAF-2, which caused drastic reduction of intratumoral VEGF levels and inhibition of angiogenesis. In summary, here we have shown, for the first time, that the vaccinia virus strains and especially GLV-5b451 have great potential for effective treatment of FMC in animal model.}, language = {en} }