Urinary tract infections (UTIs), including pyelonephritis, are among the most common and serious infections encountered by nephrologists. Emerging evidence suggests a fundamental role for the innate immune system in protecting the urothelium from bacterial challenge. This Review provides an overview of UTI pathogenesis in the upper and lower urinary tract. The authors describe the role of intercalated cells and the innate immune response in preventing UTI, focusing on the role of antimicrobial peptides in maintaining urinary tract sterility.
- Brian Becknell
- Andrew Schwaderer
- John David Spencer
