Dr. Fen Xia's lab focuses on improving cancer treatment, specifically for head and neck squamous cell carcinoma (HNSCC). They investigate how certain proteins affect the immune response to tumors, particularly how a pathway involving GSK3 and 53BP1 can lead to T cell exhaustion, which limits the success of immunotherapies. By understanding and disrupting this pathway, the lab aims to enhance T cell survival and effectiveness against tumors, contributing to better treatment options.