June 12 (Reuters) - Novartis (NOVN.S) said it has agreed to acquire U.S. biotech firm Chinook Therapeutics (KDNY.O) for up to $3.5 billion to boost its late-stage drug development line-up, raising the stakes in the race for a rare kidney disease treatment. The other drug hopeful is iptacopan, which is being trialled against a number of rare genetic disorders, including IgAN and another kidney disease. IgAN is a progressive autoimmune disease that mostly affects young adults and which can lead to kidney failure that requires dialysis or organ transplantation. IgAN is the most common cause of kidney failure in Caucasian young adults, Novartis added. Additional reporting by Miranda Murray; Editing by Kim Coghill, Sonali Paul and Alexander SmithOur Standards: The Thomson Reuters Trust Principles.

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Persons: Novartis, Vas Narasimhan, Narasimham, atrasentan, Narasimhan, Kisqali, Roche, Vera, Muddy Waters, Miranda Murray, Kim Coghill, Sonali Paul, Alexander Smith Organizations: Novartis, Chinook Therapeutics, Vera Therapeutics, Sandoz, Chinook, Thomson Locations: Seattle, United States