WASHINGTON, Sept 17 (Reuters) - A judge ruled for the

U.S. Federal Trade Commission and against Amazon ( AMZN ) on

several key issues ahead of a trial next week on the agency's

claims that the retail giant's Prime subscription practices

violated consumer protection law.

(Reporting by Kanishka Singh in Washington and Jody Godoy in

New York; Editing by Muralikumar Anantharaman)