Atypical Hemolytic: Uremic Syndrome

Research identified mutations in genes encoding complement regulatory proteins—most notably CFH (Complement Factor H), CFI , MCP , and C3 itself. In a healthy individual, Factor H acts as a brake pedal, slowing down the alternative complement pathway to prevent it from attacking healthy tissue. In aHUS patients, this brake pedal is broken or missing due to genetic mutations.

For years, aHUS was considered an unpredictable lightning strike. However, the turn of the 21st century brought a revelation: aHUS is rarely random. It is a genetic disease waiting for a trigger.