@article{PetersKnoepperGrafenetal.2022, author = {Peters, Annika E. and Kn{\"o}pper, Konrad and Grafen, Anika and Kastenm{\"u}ller, Wolfgang}, title = {A multifunctional mouse model to study the role of Samd3}, series = {European Journal of Immunology}, volume = {52}, journal = {European Journal of Immunology}, number = {2}, doi = {10.1002/eji.202149469}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-257362}, pages = {328-337}, year = {2022}, abstract = {The capacity to develop immunological memory is a hallmark of the adaptive immune system. To investigate the role of Samd3 for cellular immune responses and memory development, we generated a conditional knock-out mouse including a fluorescent reporter and a huDTR cassette for conditional depletion of Samd3-expressing cells. Samd3 expression was observed in NK cells and CD8 T cells, which are known for their specific function against intracellular pathogens like viruses. After acute viral infections, Samd3 expression was enriched within memory precursor cells and the frequency of Samd3-expressing cells increased during the progression into the memory phase. Similarly, during chronic viral infections, Samd3 expression was predominantly detected within precursors of exhausted CD8 T cells that are critical for viral control. At the functional level however, Samd3-deficient CD8 T cells were not compromised in the context of acute infection with Vaccinia virus or chronic infection with Lymphocytic choriomeningitis virus. Taken together, we describe a novel multifunctional mouse model to study the role of Samd3 and Samd3-expressing cells. We found that Samd3 is specifically expressed in NK cells, memory CD8 T cells, and precursor exhausted T cells during viral infections, while the molecular function of this enigmatic gene remains further unresolved.}, language = {en} }