BRD4 and head and neck squamous cell carcinoma: The downregulation of pathways such as “Epithelial-Mesenchymal Transition,” (EMT) “E2F Targets,” and “G2M Checkpoint” following JQ1 treatment indicates that inhibition of BRD4 disrupts critical processes involved in cell proliferation, cell cycle progression, and metastasis in HNSCC cells.