CHESHIRE, Conn.--(BUSINESS WIRE)--Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) announced today that a Phase 2 clinical study investigating Soliris® (eculizumab) as a treatment for patients with atypical Hemolytic Uremic Syndrome (aHUS) who are resistant to plasma therapy met primary and key secondary endpoints with high levels of statistical and clinical significance, according to results presented today at the American Society of Nephrology (ASN) annual meeting in Denver. The new data are consistent with an earlier interim analysis contained in the abstract of today’s presentation and published online by ASN on October 20, 2010. Soliris is a first-in-class terminal complement inhibitor discovered and developed by Alexion.