News Pressroom

September 26, 2005

Cancer Target Collaboration Agreement Signed Between MedImmune and Georgetown University

GAITHERSBURG, Md., Sept 26, 2005 /PRNewswire-FirstCall via COMTEX News Network/ -- MedImmune, Inc. (Nasdaq: MEDI) announced today that it has entered into a licensing and collaboration agreement with Georgetown University for the development of monoclonal antibodies (MAbs) targeting anaplastic lymphoma kinase (ALK), a member of the insulin receptor family of tyrosine kinases. ALK is believed to play an important role in the growth of solid tumors including those associated with prostate, colon and lung cancers.

"Over the last several years, MedImmune has strategically and substantially added to its portfolio of promising targets and technologies, especially in the area of oncology," said Dr. Peter Kiener, senior vice president, research. "The addition of the ALK preclinical program further leverages our growing expertise in receptor tyrosine kinases. Since 2001, MedImmune has been working on developing a library of antibodies targeting the largest subfamily of receptor tyrosine kinases, the Eph kinases, the first of which we hope to take into the clinic in 2006. We look forward to applying what we have learned to date to advancing MAbs targeting ALK."

"Georgetown University is delighted to strengthen its collaborative relationship with MedImmune in the cancer therapeutic field," said Martin Mullins, vice president, technology licensing, Georgetown University.

Under the terms of the agreement, MedImmune will receive exclusive worldwide rights to develop oncology therapies using MAbs targeting ALK. MedImmune will be responsible for the clinical development and commercialization of any resulting products. Georgetown University will receive an upfront payment as well as potential development milestone payments and royalties on future marketed products. The organizations will also participate in an ongoing research collaboration as part of the agreement.

About ALK

ALK is a receptor tyrosine kinase that is found at high levels in cancer cells, where it is believed to play an important role in tumor cell growth and survival. Over-expression of ALK and its ligand, pleiotrophin (PTN), has been confirmed in numerous cancer types, including prostate, breast, colon, lung, pancreatic and ovarian cancers. Research has shown that high levels of PTN are associated with lower survival rates, and in vivo study results suggest that anti-ALK antibodies may potentially reduce tumor growth and survival.

About MedImmune

MedImmune strives to provide better medicines to patients, new medical options for physicians, rewarding careers to employees, and increased value to shareholders. Dedicated to advancing science and medicine to help people live better lives, the company is focused on the areas of infectious diseases, cancer and inflammatory diseases. With approximately 2,000 employees worldwide, MedImmune is headquartered in Maryland. For more information, visit http://www.medimmune.com.

This announcement may contain, in addition to historical information, certain forward-looking statements that involve risks and uncertainties, in particular, related to the research and development of antibodies targeting ALK. Such statements reflect management's current views and are based on certain assumptions about the success of this program. Actual results could differ materially from those currently anticipated as a result of a number of factors, including risks and uncertainties discussed in MedImmune's filings with the SEC. MedImmune is developing ALK-related product candidates for potential future marketing. There can be no assurance that such development efforts will succeed, that such products will receive required regulatory clearance or that, even if such regulatory clearance were received, such products would ultimately achieve commercial success.

This press release can be found on MedImmune's website at http://www.medimmune.com in the box marked "News" or with the archived press releases on the Investor Summary page.

SOURCE MedImmune, Inc.

Media: Kate Barrett, +1-301-398-4320, or Investors: Peter Vozzo, +1-301-398-4358, both of MedImmune, Inc.