SOURCE: DOR BioPharma, Inc

November 28, 2006 08:00 ET

European Medicines Agency Accepts DOR BioPharma's MAA Filing for orBec®

MIAMI, FL -- (MARKET WIRE) -- November 28, 2006 -- DOR BioPharma, Inc. (OTCBB: DORB) ("DOR" or the "Company") announced today that the European Medicines Agency ("EMEA") has determined that the Marketing Authorization Application ("MAA") for orBec® for the treatment of gastrointestinal Graft-versus-Host disease ("GI GVHD") is valid. Validation of the MAA indicates that DOR's application is complete and that the review process has begun.

In the United States, DOR filed a New Drug Application ("NDA") with the U.S. Food and Drug Administration ("FDA") for approval to market orBec® for the treatment of GI GVHD. As announced last week, the FDA has accepted the NDA filing and has established a target date of July 21, 2007 for completion of review of the NDA.

Christopher J. Schaber, Ph.D., President and Chief Executive Officer of DOR, stated, "Validation of the MAA for orBec® in Europe initiates the official review process by the EMEA. This is critical to our worldwide orBec® development strategy and coincides with the FDA's review of our NDA for use of the product to treat GI GVHD. We believe that the data included in both filings clearly demonstrate the clinical benefit of orBec® in treating patients suffering from GI GVHD. As with the FDA, we are looking forward to productive interactions with the EMEA in order to potentially gain marketing approval for this new therapy."

GI GVHD is the most common life-threatening complication of allogeneic hematopoetic stem cell transplantation ("HSCT"). Currently, there are no approved treatments for GI GVHD, rendering this often fatal disease an area of unmet medical need. orBec® is a two-pill system containing the highly potent, topically active corticosteroid, beclomethasone dipropionate, designed to specifically target and treat upper and lower GI GVHD with reduced systemic immunosuppressive side effects. Although not approved for this indication, systemic immunosuppressive agents, such as prednisone, are currently the standard treatment for GI GVHD despite being associated with high rates of mortality due to infection and debility.

The data provided in the MAA and NDA submissions demonstrate that orBec® safely provides a lower risk of mortality compared with the current standard of care, and a lower exposure to systemic corticosteroids following allogeneic HSCT transplantation. Both filings are supported by data from two randomized, double-blinded, placebo-controlled clinical trials. The first was a 129 patient pivotal Phase 3 clinical trial for orBec® conducted at 16 bone marrow/stem cell transplant centers in the U.S. and France. The second trial was a 60 patient Phase 2 clinical trial conducted at the Fred Hutchinson Cancer Research Center. While orBec® did not achieve statistical significance in the primary endpoint of its pivotal trial, namely time to treatment failure through Day 50 (p-value 0.1177), orBec® did achieve statistical significance in other key outcomes, such as median time to treatment failure through Day 80 (p-value 0.0226), and, most importantly, it demonstrated a statistically significant survival advantage in comparison to placebo. In the pivotal Phase 3 trial, analysis of patient survival at the pre-specified endpoint of 200 days post-transplant showed a clinically meaningful and statistically significant 66% reduction (p-value 0.0139) in mortality among patients randomized to orBec®. The mortality benefit in favor of orBec® was corroborated earlier this year in a retrospective analysis of the Phase 2 study in which there was a 55% reduction in mortality at 200 days post-transplant. At one year after randomization, there were relatively consistent 51% and 45% reductions in the risk of mortality among patients randomized to orBec® in both the Phase 3 and Phase 2 studies, respectively. In the pivotal Phase 3 trial, a subgroup analysis also revealed that patients dosed with orBec® who had received stem cells from unrelated donors had a 94% reduction in the risk of mortality at Day 200.

orBec® has been granted orphan drug status by both the FDA and EMEA, which provides for seven and ten years of marketing exclusivity in each territory respectively. If approved, it is DOR's intention to commercialize orBec® on its own in the U.S. and to partner it in Europe and the rest of the world.

About Allogeneic Bone Marrow/ Hematopoietic Stem Cell Transplantation (HSCT)

Allogeneic hematopoietic stem cell transplantation ("HSCT") is considered a potentially curative option for many leukemias as well as for other forms of blood cancer. In an allogeneic HSCT procedure, hematopoietic stem cells are harvested from a closely matched relative or unrelated person, and are transplanted into the patient following either high-dose chemotherapy or intense immunosuppressive conditioning therapy. The curative potential of allogeneic HSCT is now partly attributed to the so-called graft-versus-leukemia (GVL) or graft-versus-tumor (GVT) effects of the newly transplanted donor cells to recognize and destroy malignant cells in the recipient patient.

The use of allogeneic HSCT has grown substantially over the last decade due to advances in human immunogenetics, the establishment of unrelated donor programs, the use of cord blood as a source of hematopoietic stem cells and the advent of non-myeloablative conditioning regimens ("mini-transplants") that avoid the side effects of high-dose chemotherapy. High rates of morbidity and mortality occur in this patient population. Clinical trials are also underway testing allogeneic HSCT for treatment of some metastatic solid tumors such as breast cancer, renal cell carcinoma, melanoma and ovarian cancer. Allogeneic transplants have also been used as curative therapy for several genetic disorders, including immunodeficiency syndromes, inborn errors of metabolism, thalassemia and sickle cell disease. The primary toxicity of allogeneic HSCT, however, is GVHD, in which the newly transplanted donor cells damage cells in the recipient's gastrointestinal tract, liver and skin.

About Gastrointestinal Graft-versus-Host Disease (GI GVHD)

The gastrointestinal manifestation of GVHD (GI GVHD) occurs in approximately 60% of related donor and 70% of unrelated donor allogeneic transplant patients. Of the organ systems affected by GVHD, GI GVHD is the most common and often the most persistent manifestation of the GVHD process. Symptoms include anorexia, nausea, vomiting, diarrhea, bloody stool, cramping, epithelial cell necrosis and, in severe cases, ulceration and exfoliation of the intestinal mucosa.

GI GVHD patients are often hospitalized if they cannot sustain nutrition from oral intake, in which case they rely on parenteral nutrition for sustenance. Under current standards of care, these patients have a high rate of readmission due to relapse of GI GVHD and the side effects of immunosuppressive therapy that is given to treat GVHD. Infection by cytomegalovirus, adenovirus, bacteria and fungi are particularly common among patients who require prolonged prednisone treatment. These factors contribute to the high rates of hospitalization and mortality in GI GVHD patients.

For more information about allogeneic HSCT and GVHD, please visit the website of the American Society for Blood and Marrow Transplantation at: or visit

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 is 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 more distal portions of the GI tract.

About DOR BioPharma, Inc.

DOR BioPharma, Inc. 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 with the FDA for the treatment of GI GVHD, and has received an FDA PDUFA date of July 21, 2007. An MAA with the EMEA for orBec® has also been filed and validated. orBec® may also have application in treating other gastrointestinal disorders characterized by severe inflammation.

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. The ricin toxin vaccine, RiVax™, has successfully completed a Phase 1 clinical trial in normal volunteers.

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

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 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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