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   04. Jun, 2012

   Cleveland BioLabs Reports Strong Survival Results Which Met the Primary Endpoint of Its GLP Efficacy Study With Radiation Countermeasure CBLB502

   BUFFALO, N.Y., June 4, 2012 (GLOBE NEWSWIRE) — Cleveland BioLabs, Inc. (Nasdaq:CBLI – News) today announced strong survival results for its randomized, blinded, placebo-controlled efficacy study of CBLB502 in 179 non-human primates (NHPs) conducted under Good Laboratory Practice (GLP) with elements of Good Clinical Practice (GCP), as required by the U.S. Food and Drug Administration’s (FDA) Animal Rule. The study demonstrated with a high degree of statistical significance the dose-response relationship between the administration of CBLB502 and the survival of lethally irradiated animals, the study’s primary endpoint.

   Animals in the study received a 70% lethal dose of total body irradiation (TBI) followed by a single injection of a range of doses of CBLB502 or a placebo, in each case, 25 hours after irradiation. In addition to determination of 60-day survival, the study measured multiple pharmacodynamic parameters which the Company believes are essential for animal-to-human dose conversion.

   A minimal efficacious dose of CBLB502 was determined and doses above the minimal efficacious dose formed a plateau at approximately 75% survival, compared to 27.5% survival in the placebo treated group. These results demonstrated with a high degree of statistical significance (p < 0.0001 for the trend up to the 40 ug/kg dose and p = 0.0021 for the trend up to the 10 ug/kg dose) that a single administration of CBLB502 given 25 hours after TBI led to a nearly three-fold increase in overall survival in the subject animals.

   Ann Hards, Ph.D., Executive Vice President of Regulatory Affairs and Quality Assurance, stated, "We are very pleased with the compelling survival data reported in this study. In addition to demonstrating CBLB502's effect on survival, we believe this study supports our methodology for dose conversion between animals and humans. We plan on using the findings from this trial as a basis for finalizing our remaining development steps with the FDA and, ultimately, submitting our Biologic License Application."

   Yakov Kogan, Ph.D., MBA, interim Chief Executive Officer, commented: "I congratulate our team on the rigorous execution of this study. To our knowledge, this trial is the first ever GLP/GCP compliant, randomized, blinded study done with any radiation countermeasure. CBLB502 continues to exceed our expectations and we are as committed as ever to moving this program forward."

   About Cleveland BioLabs, Inc.

   Cleveland BioLabs, Inc. is a clinical-stage biotechnology company leveraging deep mechanistic understanding of the cell death process, apoptosis, to develop a robust pipeline of compounds primarily focused on oncology applications and mitigation of radiation injury. The Company's lead compound is being developed as both a radiation countermeasure and a direct acting anticancer agent. The Company has two operating subsidiaries, Incuron, LLC, and Panacela Labs, Inc., and strategic relationships with the Cleveland Clinic, Roswell Park Cancer Institute, the Children's Cancer Institute of Australia and the Armed Forces Radiobiology Research Institute. To learn more about Cleveland BioLabs, Inc., please visit the Company's website at http://www.cbiolabs.com.

   The Cleveland BioLabs, Inc. logo is available at http://www.globenewswire.com/newsroom/prs/?pkgid=11668

   This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect management’s current expectations, as of the date of this press release, and involve certain risks and uncertainties. The Company’s actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors.

   These factors include, among others, the Company’s history of operating losses and the potential for future losses, which may lead the Company to not be able to continue as a going concern; the Company’s need for substantial additional financing to meet its business objectives; the potential for the loss of funding from the Company’s R&D grants and contracts and its ability to win additional funding under such grants and contracts; the Company’s failure to successfully and timely develop new products; the risks inherent in the early stages of drug development and in conducting clinical trials; the Company’s inability to obtain regulatory approval in a timely manner or at all; the Company’s collaborative relationships and the financial risks related thereto; the Company’s ability to comply with its obligations under license agreements; the potential for significant product liability claims; and the Company’s ability to comply with various safety, environmental and other governmental regulations. Some of these factors could cause future results to materially differ from the recent results or those projected in forward-looking statements. See also the “Risk Factors” and “Forward-Looking Statements” described in the Company’s periodic filings with the Securities and Exchange Commission.