HYBRIDON CHANGES NAME TO IDERA PHARMACEUTICALS

Hybridon, Inc. (Amex: HBY) announced today that it has changed its name to Idera Pharmaceuticals, Inc. (Amex: IDP). Idera common shares will begin trading under a new American Stock Exchange symbol 'IDP' on Tuesday, September 13, 2005. The Company's new website is located at http://www.iderapharma.com. (Logo: http://www.newscom.com/cgi-bin/prnh/20050912/NEM028LOGO.) "This name change signifies a new era for our Company and reflects the significant progress we have made in the development of targeted immune therapies based on Toll-like receptors" commented Sudhir Agrawal, D.Phil., President and CEO of Idera Pharmaceuticals.
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