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T Cell Immunity In Pancreatic Cancer Is Undermined By Dendritic Cell Dysfunction, Samarth Hegde Dec 2019

T Cell Immunity In Pancreatic Cancer Is Undermined By Dendritic Cell Dysfunction, Samarth Hegde

Arts & Sciences Electronic Theses and Dissertations

Pancreatic cancer carries a dismal prognosis, and desperately needs viable therapeutic interventions beyond chemo-radiation. T cell-dependent immunotherapies have shown great promise in several tumor types, but have not been effective for the vast majority of pancreatic cancer patients. This is, in part, due to our limited understanding of how antigenicity of pancreatic lesions is recognized, and how adaptive immunity is overcome in this disease. We sought to study tumor-immune interactions and identify mechanisms for this immune-failure using several spontaneous and unperturbed mouse models of pancreatic adenocarcinoma. We found that early pancreatic lesions fail to elicit tumor-limiting CD4+ TH1 and CD8+ …


A Double Humanized Blt-Mice Model Featuring A Stable Human-Like Gut Microbiome And Human Immune System, Lance Daharsh, Jianshui Zhang, Amanda E. Ramer-Tait, Qingsheng Li Jan 2019

A Double Humanized Blt-Mice Model Featuring A Stable Human-Like Gut Microbiome And Human Immune System, Lance Daharsh, Jianshui Zhang, Amanda E. Ramer-Tait, Qingsheng Li

Nebraska Center for Virology: Faculty Publications

Humanized mice (hu-mice) that feature a functional human immune system have fundamentally changed the study of human pathogens and disease. They can be used to model diseases that are otherwise difficult or impossible to study in humans or other animal models. The gut microbiome can have a profound impact on human health and disease. However, the murine gut microbiome is very different than the one found in humans. There is a need for improved pre-clinical hu-mice models that have an engrafted human gut microbiome. Therefore, we created double hu-mice that feature both a human immune system and stable human-like gut …