The Role of Magnesium in Acute Pancreatitis and Pancreatic Injury: A Systematic Review.

Introduction: As natural calcium (Ca) antagonist, magnesium (Mg) seems to counteract Ca-signaling pathways involved in the intracellular protease activation leading to acute pancreatitis. We systematically reviewed the current literature to investigate the role of Mg in the pathogenesis of acute pancreatitis and its possible use in detecting, predicting, and preventing acute pancreatitis. Methods: A systematic search was performed in PubMed/Scopus/Web of Science to identify in vivo and in vitro studies reporting data on Mg in acute pancreatitis. Results: Twelve studies were included. Due to their heterogeneity, we conducted a review without the intent of inference. Mg deficiency in pancreatic acinar cells seems to be frequently associated with serum hypocalcemia and acute pancreatitis. Mg seems to contrast intracellular Ca accumulation which induces premature enzyme activation and acute pancreatitis. Several in vivo and in vitro experiments showed beneficial effects of Mg supplementation in counteracting Ca-signaling pathways and subsequent pathological events. Moreover, a recent randomized trial demonstrated the efficacy of Mg supplementation in reducing the incidence of post-endoscopic retrograde cholangiopancreatography (ERCP) pancreatitis in high-risk patients. Conclusion: Mg is a natural antagonist of Ca-signaling pathways and, when deficient, predisposes to acute pancreatitis. Mg supplementation may be useful to prevent acute pancreatitis in many contexts, such as post-ERCP or after pancreatic surgery. The heterogeneity of the included studies represents an important limitation that may hinder robust conclusions.