SOURCE: DOR BioPharma, Inc.

September 12, 2007 07:59 ET

DOR BioPharma Announces Initiation of GI Radiation Injury Program Pursuant to $1 Million NIH Grant

MIAMI, FL--(Marketwire - September 12, 2007) - DOR BioPharma, Inc. (OTCBB: DORB) ("DOR" or the "Company") announced today that its academic partner, the Fred Hutchinson Cancer Research Center (FHCRC), has received a $1 million grant from the National Institute of Health (NIH) to conduct preclinical studies of oral Beclomethasone Dipropionate (oral BDP, also the active ingredient in orBec®) for the treatment of gastrointestinal (GI) radiation injury.

The purpose of the studies funded by the grant entitled "Improving Gastrointestinal Recovery after Radiation," is to evaluate the ability of three promising clinical-grade drugs including oral BDP, given alone or in combination, that are likely to significantly mitigate the damage to the gastrointestinal epithelium caused by exposure to high doses of radiation using a well-established dog model. The GI tract is highly sensitive to ionizing radiation and the destruction of epithelial tissue is one of first effects of radiation exposure. The rapid loss of epithelial cells leads to inflammation and infection that are often the primary cause of death in acute radiation injury. This type of therapy, if successful, will benefit cancer patients undergoing radiation, chemotherapy, or victims of nuclear-terrorism.

In most radiation scenarios, injury to the hematopoietic (blood) system and gastrointestinal tract are the main determinants of survival. The studies will compare overall survival and markers of intestinal cell regeneration when the drug regimens are added to supportive care intended to boost proliferation of blood cells. The Principal Investigator of the study is George E. Georges, MD, Associate Member of the Fred Hutchinson Cancer Research Center.

"We are very excited about this research," said Dr. Georges. "There is an urgent need to develop specific countermeasures against the lethality caused by intestinal exposure to radiation and against the pathophysiological manifestations of radiation-induced gastrointestinal injury. In the event of a nuclear terrorist attack, radiation victims will likely not be given prior warning. Therefore, it is imperative to identify drug treatment that can be given after radiation exposure which will enhance survival and promote immune reconstitution. We are encouraged by the supportive evidence that oral BDP will have GI radioprotective effects."

"The GI radiation injury program nicely straddles our 2 business segments of Biotherapeutics and Biodefense," stated Christopher J. Schaber, PhD, President and Chief Executive Officer of DOR. "Given the positive outcomes of our lead product orBec® (oral BDP) for the treatment of gastrointestinal GVHD, a debilitating and many times fatal inflammatory condition, we believe we will be able to demonstrate that oral BDP will be effective in GI radiation injury, an unmet medical need in both the cancer and bioterror areas. DOR is further committed to expanding the clinical application of oral BDP into other inflammatory diseases of the GI tract. DOR remains committed to working closely with the medical community to explore the many potential uses of oral BDP to benefit patients."

About GI Radiation Injury

Injury to the GI tract following accidental exposure to ionizing radiation has been shown in a number of cases to have a significant role in patient survival or mortality. Following radiation exposure, GI tract injury is due to the direct effects of irradiation owing to the radiation sensitivity of the GI tract, as well as from indirect effects associated with radiation exposure on other sensitive organs such as the bone marrow and skin. Several factors contribute to the GI tract injury. One important factor is the damage to the intestinal epithelial cell barrier and the intestinal stem cells. Renewal of the intestinal epithelial barrier depends upon an active stem cell compartment similar to the hematopoietic system, and the intestinal stem cells are particularly sensitive to ionizing radiation exposure. With increasing radiation dose, the intestinal stem cells cannot produce enough cells to repopulate the villi, which results in blunting and diminution in villus height and eventual functional incapacity. This leads to decreased nutrient absorption and barrier function, loss of fluid and electrolytes, and bacterial translocation through the intestinal barrier.

orBec® (Oral BDP) Submitted for Regulatory Approval

orBec®'s New Drug Application ("NDA") for the treatment of GI GVHD was filed with the U.S. Food and Drug Application ("FDA"), and the Marketing Authorization Application ("MAA") was filed with the European Medicines Evaluation Agency ("EMEA"). Both health authorities have accepted the filings for review and after supplemental data submission to the FDA in July, the FDA has said it will respond to DOR's NDA by October 21, 2007 under PDUFA guidelines.

About orBec®

orBec® represents a first-of-its-kind oral, locally acting therapy tailored to treat the gastrointestinal manifestation of GVHD, the organ system where GVHD is most frequently encountered and highly problematic. orBec®, if approved by the EMEA and the FDA, would be the first oral formulation of beclomethasone dipropionate ("BDP") available in the European Union and the United States, respectively. orBec® is intended to reduce the need for systemic immunosuppressive drugs to treat GI GVHD. BDP is a highly potent, topically active corticosteroid that has a local effect on inflamed tissue. BDP has been marketed in the U.S. and worldwide since the early 1970s as the active pharmaceutical ingredient in a nasal spray and in a metered dose inhaler for the treatment of patients with allergic rhinitis and asthma. orBec® is formulated for oral administration as a single product consisting of two tablets; one tablet is intended to release BDP in the proximal portions of the GI tract and the other tablet is intended to release BDP in the distal portions of the GI tract.

In addition to issued patents and pending worldwide patent applications held by or exclusively licensed to DOR, orBec® also benefits from orphan drug designations in the U.S. and in Europe for the treatment of GI GVHD, which provide for 7 and 10 years of post-approval market exclusivity, respectively.

About DOR BioPharma, Inc.

DOR BioPharma, Inc. (DOR) is a biopharmaceutical company developing products to treat life-threatening side effects of cancer treatments and serious gastrointestinal diseases, and vaccines for certain bioterrorism agents. DOR's lead product, orBec® (oral beclomethasone dipropionate), is a potent, locally acting corticosteroid being developed for the treatment of GI GVHD, a common and potentially life-threatening complication of bone marrow transplantation. DOR has filed an NDA for orBec® with the FDA for the treatment of GI GVHD, and subsequent to supplemental information recently submitted, the FDA has extended the PDUFA (Prescription Drug User Fee Act) date to October 21, 2007. An MAA (Marketing Authorization Application) with the EMEA (European Medicines Evaluation Agency) has also been filed and validated. orBec® may also have application in treating other gastrointestinal disorders characterized by severe inflammation. DOR has also recently initiated a development program with its Lipid Polymer Micelle (LPM™) oral drug delivery technology for the oral delivery of leuprolide for the treatment of prostate cancer and endometriosis.

Through its Biodefense Division, DOR is developing biomedical countermeasures pursuant to the recently enacted Project BioShield Act of 2004. DOR's biodefense products in development are recombinant subunit vaccines designed to protect against the lethal effects of exposure to ricin toxin and botulinum toxin. DOR's ricin toxin vaccine, RiVax™, has been shown to be well tolerated and immunogenic in a Phase 1 clinical trial in normal volunteers.

For further information regarding DOR BioPharma, please visit the Company's website located at

The project described above was supported by Grant Number RC1AI078517 from the National Institute of Allergy and Infectious Diseases. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institute of Allergy and Infectious Diseases or the National Institutes of Health.

This press release contains forward-looking statements, within the meaning of Section 21E of the Securities Exchange Act of 1934, that reflect DOR BioPharma, Inc.'s current expectations about its future results, performance, prospects and opportunities, including statements regarding the potential use of orBec® for the treatment of gastrointestinal GVHD and the prospects for regulatory filings for orBec®. Where possible, DOR has tried to identify these forward-looking statements by using words such as "anticipates," "believes," "intends," or similar expressions. These statements are subject to a number of risks, uncertainties and other factors that could cause actual events or results in future periods to differ materially from what is expressed in, or implied by, these statements. DOR cannot assure you that it will be able to successfully develop or commercialize products based on its technology, including orBec®, particularly in light of the significant uncertainty inherent in developing vaccines against bioterror threats, manufacturing and conducting preclinical and clinical trials of vaccines, and obtaining regulatory approvals, that its technologies will prove to be safe and effective, that its cash expenditures will not exceed projected levels, that it will be able to obtain future financing or funds when needed, that product development and commercialization efforts will not be reduced or discontinued due to difficulties or delays in clinical trials or due to lack of progress or positive results from research and development efforts, that it will be able to successfully obtain any further grants and awards, maintain its existing grants which are subject to performance, enter into any biodefense procurement contracts with the U.S. Government or other countries, that the U.S. Congress may not pass any legislation that would provide additional funding for the Project BioShield program, that it will be able to patent, register or protect its technology from challenge and products from competition or maintain or expand its license agreements with its current licensors, or that its business strategy will be successful. Important factors which may affect the future use of orBec® for gastrointestinal GVHD include the risks that: because orBec® did not achieve statistical significance in its primary endpoint in the pivotal Phase 3 clinical study (i.e. a p-value of less than or equal to 0.05), the Oncologic Drug Advisory Committee ("ODAC") appointed by the FDA voted that the data supporting orBec® did not show substantial evidence of efficacy by a margin of 7 to 2 for the treatment of GI GVHD, although the FDA is not bound by ODAC's decision, the FDA may not consider orBec® approvable based upon existing studies, orBec® may not show therapeutic effect or an acceptable safety profile in future clinical trials, if required, or could take a significantly longer time to gain regulatory approval than DOR expects or may never gain approval; DOR is dependent on the expertise, effort, priorities and contractual obligations of third parties in the clinical trials, manufacturing, marketing, sales and distribution of its products; or orBec® may not gain market acceptance; and others may develop technologies or products superior to orBec®. These and other factors are described from time to time in filings with the Securities and Exchange Commission, including, but not limited to, DOR's most recent reports on Form 10-QSB and Form 10-KSB. DOR assumes no obligation to update or revise any forward-looking statements as a result of new information, future events, and changes in circumstances or for any other reason.

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