News

Horizon Oncology Center to Participate in Clinical Research Study of a New Investigational Drug for Lung Cancer

Lafayette, Indiana, February 16, 2010 - Horizon Oncology Center is now recruiting

qualified participants for phase one of a two part clinical research study using the

investigational drug MM-121. Horizon Oncology Center is the first of only three study

centers in the United States to offer this clinical research study.

In this first phase of the research study, study participants with non-small cell lung cancer

will be treated with MM-121 in combination with Tarveca ® (erlotinib) – an oral targeted

drug used to treat non-small cell lung cancer.

The ErbB3 receptor is a novel target known to be a key mediator of signaling in the ErbB

pathway (also known as the EGFR or HER pathway) – a signaling network that impacts a

broad array of cancers. Research data has also shown that ErbB3 may play a central role

in resistance to both targeted therapies and chemotherapy in a number of tumor types. By

targeting ErbB3, MM-121 is designed to have a broad application across cancer as both a

monotherapy and in combination with other therapeutics.

“This study will help answer the question of whether this new investigational drug is a

safe and effective method of delivering potent drugs to cancer cells without the serious

side effects associated with traditional chemotherapy,” added Dr. Harb.

Merrimack developed MM-121 after identifying the importance of ErbB3 through its

Network Biology approach, a fully integrated drug discovery and development technique

that combines biology, engineering, and computational modeling to better understand the

underlying complexity of disease pathways. The information derived from Network

Biology informs the strategic decisions guiding early pharmaceutical discovery as well as

helping to advance investigational drugs through pre-clinical, clinical development and

towards commercialization.

To participate in this research study, individuals must be at least 18 years of age and have

been previously treated with at least one, but not more than two, chemotherapy regimens.

Individuals with no previous chemotherapy treatment may be eligible depending on the

characteristics of his/her disease. Additional details and eligibility criteria can be found at

www.clinicaltrials.gov by searching with the keyword “MM-121” or by contacting

Horizon Oncology Center at 765-446-5111.

About Merrimack

Merrimack is a biopharmaceutical company dedicated to the discovery and development

of investigational drugs for cancer and inflammation. Merrimack’s first two oncology

investigational drugs, MM-121, in partnership with sanofi-aventis, and MM-111, are in

Phase 1 clinical testing with multiple pre-clinical development and research studies.

MM-121 and MM-111 are investigational drugs and have not been approved by any

regulatory agency. For additional information, please visit

http://www.merrimackpharma.com.

About Horizon Oncology Center

Horizon Oncology Center, located in Lafayette, Indiana is a cancer treatment center

offering some of the nation’s most advanced treatment options to patients throughout the

country. The center connects doctors and researchers to provide patients with access to a

broad range of leading-edge treatments and national clinical research studies.

Led by Wael Harb, MD – Medical Oncologist, Horizon Oncology Center maintains

active affiliations and partnerships with some of the nation’s leading oncology

treatment/research centers and pharmaceutical manufacturers including MD Anderson,

the IU Simon Cancer Center, the National Cancer Institute and the Purdue Cancer Center.

Horizon Oncology Center maintains a dedicated Clinical Research Director that works

directly with patients, caregivers and family members to provide information regarding

specific cancers and study options.

For more information about Horizon Oncology Center visit www.horizononcology.com.

Tarceva® is marketed by Genentech and OSI Pharmaceuticals. Tarceva® and its logo

mark are trademarks of OSI Pharmaceuticals, Inc.

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