November 1, 2012

Athersys Receives Cell Therapy Manufacturing Award

Company Recognized for Development of Automated Bioreactor Manufacturing System for Its MultiStem(R) Therapy

CLEVELAND, Nov. 1, 2012 (GLOBE NEWSWIRE) -- Athersys, Inc. (Nasdaq:ATHX) announced that its subsidiary, ReGenesys BVBA, recently received the BioProcess International Award for the "Technical Application of the Decade" in Manufacturing for its use of an automated bioreactor system for the production of MultiStem®, Athersys' proprietary, off-the-shelf stem cell therapy. Award winners in other categories included Bayer Healthcare and Technology Services and GE Healthcare, among others.

The work conducted by ReGenesys scientists, with the support of Terumo BCT of Lakewood, Colorado, demonstrates that MultiStem cell therapy can be successfully manufactured in an automated bioreactor system. Unlike other cell therapies, the MultiStem product may be manufactured on a large scale, allowing up to a million or more doses to be produced from a single donor. The unique biological characteristics of MultiStem allow for substantial expansion of the cell product in culture, while maintaining potency and product consistency.

"MultiStem has some key advantages relative to other cell therapy approaches, including superior expansion potential and scalability, as well as distinctive therapeutic properties. This award highlights the manufacturability of MultiStem cells in automated bioreactor systems," said Robert Deans, Ph.D., Executive Vice President and Head of Regenerative Medicine at Athersys. "We are excited by the progress made by our Belgian team and remain committed to building on our inherent expansion advantages to develop the best-in-class commercial manufacturing platform to supply the many therapeutic indications for which MultiStem could be developed."

About MultiStem

MultiStem® cell therapy is a patented product that has shown the ability to promote tissue repair and healing in a variety of ways, such as through the production of multiple therapeutic factors produced in response to signals of inflammation and tissue damage. MultiStem has demonstrated therapeutic potential for the treatment of inflammatory and immune disorders, neurological conditions, and cardiovascular disease, as well as other areas, and represents a unique "off-the-shelf" stem cell product that can be manufactured in a scalable manner, may be stored for years in frozen form, and is administered without tissue matching or the need for immune suppression. The product is extensively characterized for safety, consistency and potency. Athersys has forged strategic partnerships with Pfizer Inc. to develop MultiStem for inflammatory bowel disease and with RTI Biologics, Inc. to develop cell therapy for use with a bone allograft product in the orthopedic market.

About Athersys

Athersys is a clinical stage biotechnology company engaged in the discovery and development of therapeutic product candidates designed to extend and enhance the quality of human life. The Company is developing its MultiStem® cell therapy product, a patented, adult-derived "off-the-shelf" stem cell product platform for disease indications in the cardiovascular, neurological, inflammatory and immune disease areas. The Company currently has several clinical stage programs involving MultiStem, including treatment of inflammatory bowel disease, ischemic stroke, damage caused by myocardial infarction, and for the prevention of graft versus host disease. Athersys has also developed a diverse portfolio that includes other technologies and product development opportunities, and has forged strategic partnerships and collaborations with leading pharmaceutical and biotechnology companies, as well as world-renowned research institutions in the United States and Europe to further develop its platform and products. More information is available at www.athersys.com.

The Athersys, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=4548

Forward-Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve risks and uncertainties. These forward-looking statements relate to, among other things, the expected timetable for development of our product candidates, our growth strategy, and our future financial performance, including our operations, economic performance, financial condition, prospects, and other future events. We have attempted to identify forward-looking statements by using such words as "anticipates," "believes," "can," "continue," "could," "estimates," "expects," "intends," "may," "plans," "potential," "should," "suggest," "will," or other similar expressions. These forward-looking statements are only predictions and are largely based on our current expectations. A number of known and unknown risks, uncertainties, and other factors could affect the accuracy of these statements. Some of the more significant known risks that we face that could cause actual results to differ materially from those implied by forward-looking statements are the risks and uncertainties inherent in the process of discovering, developing, and commercializing products that are safe and effective for use as human therapeutics, such as the uncertainty regarding market acceptance of our product candidates and our ability to generate revenues, including MultiStem for the treatment of inflammatory bowel disease, acute myocardial infarction, stroke and other disease indications, including lysosomal storage disorders, and the prevention of graft-versus-host disease. These risks may cause our actual results, levels of activity, performance, or achievements to differ materially from any future results, levels of activity, performance, or achievements expressed or implied by these forward-looking statements. Other important factors to consider in evaluating our forward-looking statements include: our ability to raise additional capital; final results from our MultiStem clinical trials; the possibility of delays in, adverse results of, and excessive costs of the development process; our ability to successfully initiate and complete clinical trials; changes in external market factors; changes in our industry's overall performance; changes in our business strategy; our ability to protect our intellectual property portfolio; our possible inability to realize commercially valuable discoveries in our collaborations with pharmaceutical and other biotechnology companies; our ability to meet milestones under our collaboration agreements; our collaborators' ability to continue to fulfill their obligations under the terms of our collaboration agreements; our possible inability to execute our strategy due to changes in our industry or the economy generally; changes in productivity and reliability of suppliers; and the success of our competitors and the emergence of new competitors. You should not place undue reliance on forward-looking statements contained in this press release, and we undertake no obligation to publicly update forward-looking statements, whether as a result of new information, future events or otherwise.

CONTACT: William (B.J.) Lehmann, J.D.

         President and Chief Operating Officer

         Tel: (216) 431-9900

         bjlehmann@athersys.com



         Investor Relations:

         Lisa M. Wilson

         In-Site Communications

         Tel: (917) 543-9932

         lwilson@insitecony.com

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Source: Athersys, Inc.

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