Background/Objectives: This study investigated the gene expression levels of High Mobility Group Box 1 (HMGB1), nuclear factor kappa B (NF-κB) and interleukin-17 (IL-17) in the serum of patients with acute pancreatitis (AP) and analyzed the correlation of these three with the severity of AP, local and systemic complications, transfer to intensive care unit (ICU) and death. This evidence concerns the gene HMGB1 and acute pancreatitis.