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Compugen Announces Validation Of Two Immune System Modulating Drug Candidates

Speaking today at the Rodman & Renshaw Annual Global Investment Conference in New York City, Martin Gerstel, chairman of Compugen Ltd. (NASDAQ: CGEN), reviewed the current status of the Company and announced the validation of two therapeutic product candidates, CGEN-15021 and CGEN-15091, in various autoimmune disease animal models. These two molecules are soluble proteins based on two B7/CD28-like proteins recently discovered by Compugen. In view of its key role in modulating immune response, the B7/CD28 family of proteins is of high interest in medical research and to the pharmaceutical industry, and these newly discovered molecules share key characteristics with this protein family. In addition to the potential use of CGEN-15021 and CGEN-15091 as protein therapeutics for multiple autoimmune diseases, the two proteins they are based on are predicted to have utility as drug targets for monoclonal antibody therapy in oncology.

CGEN-15021 and CGEN-15091 are both soluble fusion proteins, each combining the extracellular domain of one of the newly discovered B7/CD28-like proteins and an Fc antibody fragment. Fusion to an Fc antibody fragment is an established methodology to create soluble long-acting therapeutic proteins. The results being announced today relate to the recent validation of CGEN-15021 in animal disease models of both multiple sclerosis and rheumatoid arthritis, and of CGEN-15091 in an animal disease model of multiple sclerosis. In each of these disease models, the Compugen fusion proteins demonstrated dramatic therapeutic effects in ameliorating disease symptoms. In addition, in earlier in vitro experiments, CGEN-15021 and CGEN-15091 exhibited inhibition of T cell activation, confirming their predicted role in the modulation of the immune system.

In his presentation (which has been posted on Compugen’s website:, Mr. Gerstel stated, “The discovery process for these two immunomodulatory proteins is an excellent example of the power and uniqueness of the broad based scientific infrastructure for predictive discovery that has been established at Compugen over the past decade. This infrastructure now allows the rapid development of accurate in silico capabilities for the prediction of innovative therapeutic solutions in selected areas of unmet medical need. In this case, we initially directed these capabilities to the B7/CD28 protein family, a protein family of very high industry interest due to its key role in regulating immune responses, and one with significant therapeutic potential in major pathological conditions, such as autoimmune diseases, transplantation and cancer.”

Mr. Gerstel continued, “Within approximately six months, we had integrated multiple components of our infrastructure capabilities to develop the Protein Family Members Discovery Platform, which during its initial discovery process, predicted nine new proteins sharing characteristics with the B7/CD28 protein family. The first three of these nine, consisting of the previously disclosed CGEN-15001 which is currently moving forward in our Pipeline Program, and the two proteins for which positive in vivo results are being announced today, have now been validated in established animal disease models. In addition, we subsequently extended this discovery capability beyond the B7/CD28 family, as well as developing additional capabilities for the discovery of other types of immune related proteins, some of which are now beginning the validation process.”

Mr. Gerstel continued, “With respect to today’s disclosure, the in vitro validation experiments and the in vivo study in a multiple sclerosis animal model of CGEN-15021 and CGEN-15091 were part of Compugen’s long-term research agreement with Prof. Stephen Miller’s laboratory at Northwestern University. The in vivo validation of CGEN-15021 in a rheumatoid arthritis model was conducted at Dr. Richard Williams’ laboratory at the Kennedy Institute of Rheumatology, Oxford University. Having long-term relationships with leading scientists at academic laboratories with well established assays and animal models, enables Compugen to quickly and efficiently validate its new discoveries.”

Mr. Gerstel concluded, “We enthusiastically look forward to the further development of these very attractive drug candidates, and to the ongoing application of our unique capabilities to additional areas of unmet medical need.”

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