Seminario - Biotecnologie e Bioscienze - Giovedì 11 giugno 2026, 16.30, edificio U3-BIOS, aula U3-09.
Andrea Morrione, Temple University, USA.
Abstract
Progranulin is a pleiotropic growth factor with important physiological roles in embryogenesis and maintenance of adult tissue homeostasis. While progranulin deficiency is associated with a broad range of pathological conditions affecting the brain, such as frontotemporal dementia and neuronal ceroid lipofuscinosis, progranulin upregulation characterizes many tumors, including brain tumors, multiple myeloma, leiomyosarcoma, mesothelioma and epithelial cancers such as ovarian, liver, breast, bladder, adrenal, prostate and kidney carcinomas. The increase of progranulin levels in tumors might have diagnostic and prognostic significance. In cancer, progranulin has a pro-tumorigenic role by promoting cancer cell proliferation, migration, invasiveness, anchorage-independent growth and resistance to chemotherapy. In addition, progranulin regulates the tumor microenvironment, affects the function of cancer-associated fibroblasts, and modulates tumor immune surveillance. However, the molecular mechanisms of progranulin oncogenic function are not fully elucidated.
We previously demonstrated that, in bladder cancer, progranulin action relies on the activation of its functional signaling receptor EphA2. Notably, more recent data suggest that progranulin can also modulate a functional crosstalk between multiple receptor-tyrosine kinases, demonstrating a more complex and context-dependent role of progranulin in cancer. Here, we will present data on the identification by proteomic approaches of a novel progranulin/EphA2 downstream effector, FAM120A, and its critical role in modulating progranulin-dependent biological responses and in vivo tumor initiation in bladder cancer. We will also discuss the role that ubiquitination and trafficking play in modulating EphA2 signal intensity and the putative role of Nedd4L in regulating EphA2 action.
Ospite: Vanoni, Sacco
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