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Aastrom Biosciences Initiates Pivotal Trial of The AastromReplicell(TM) System in Breast Cancer Patients
ANN ARBOR, Mich., Dec. 2 /PRNewswire/ --Following positive results from initial studies announced in October 1998, Aastrom Biosciences, Inc. (Nasdaq: ASTM) announced today the initiation of a pivotal clinical trial to evaluate the use of the AastromReplicell(TM) Cell Production System (System) to provide an alternative method of cell collection for cancer patients requiring an autologous stem cell transplant.
Results from an earlier multi-center trial, completed under an Investigational Device Exemption (IDE) from the U.S Food and Drug Administration (FDA), demonstrated that patients achieved rapid blood cell and immune system recoveries when treated with a combination of bone marrow cells produced in the AastromReplicell(TM) System and a low dose of peripheral blood stem cells (PBSC) collected in a single blood apheresis procedure. In spite of the low doses of PBSC used, which for some of the patients treated was as low as one-tenth of an optimal targeted dose of PBSC, the median recovery times for platelets and neutrophils for these patients were comparable to the average rates reported for similar patients receiving standard doses of PBSC collected through multiple blood apheresis cycles.
"The results from our previous clinical trial demonstrated that blood and immune system recoveries for patients treated with a combination of cells produced in the AastromReplicell(TM) System, plus a low dose of PBSC, appear to provide targeted recovery rates similar to patients treated with traditional large-dose PBSC methods involving multiple blood apheresis collection procedures," said R. Douglas Armstrong, Ph.D., President and Chief Executive Officer of Aastrom. "The pivotal trial represents an extension of the earlier trial and will now include the addition of a randomized control patient group receiving standard of care PBSC. We believe the subsequent trial results will further demonstrate the clinical utility of the AastromReplicell(TM) System to produce therapeutic quantities of cells for the treatment of cancer patients."
Dr. Armstrong added, "We recently achieved our first product objective with receipt of the CE Mark and approval to market the AastromReplicell(TM) System instrument platform in Europe. We expect similar approvals by year-end for our two lead therapy kits used in the production of bone marrow and umbilical cord blood cells used in stem cell therapy. We intend to use this growing body of positive clinical data to support marketing activities in Europe and to later support a Pre-Market Approval Application with the FDA."
The AastromReplicell(TM) System is designed to be a first of its kind product, providing a cost-effective, efficient method to produce cells useful in a broad range of therapies. The AastromReplicell(TM) System clinical trial intends to demonstrate a solution to some of the key problems in the current field of cell therapy by offering patients a potentially less invasive and more reliable cell collection procedure.
Invasiveness, cost and procedure uncertainty represent challenges and concerns in current stem cell therapy practice. The results of the clinical trials completed to date indicate that the AastromReplicell(TM) System has the potential to address these challenges and may offer many patients a better overall standard of care. The potential of this procedure is particularly promising for the large percentage of patients for whom the desired therapeutic dose of PBSC can either not be achieved, or requires multiple cycles of blood apheresis to do so. The pivotal trial will elucidate if these patients have acceptable bone marrow for use in the AastromReplicell(TM) System, which may provide an opportunity for an optimal transplant recovery with only a single apheresis procedure.
Stem cell transplants are commonly used to treat patients with cancer or other diseases who have undergone extensive chemotherapy or radiation treatments. These therapies damage or destroy the patient's bone marrow and blood and immune system cells. Consequently, patients receive a stem cell transplant to restore these vital cells and tissues. Standard practice in stem cell therapy involves collecting a large number of stem cells through multiple PBSC apheresis procedures, each of which typically lasts from three to five hours. A dose of 5 x 10(6) CD34+ cells/kg is generally viewed as an optimal target dose of cells for transplantation use. More often, patients receive 2.0 to 2.5 x 10(6) CD34+ cells/kg, and in a significant number of patients, collection of 1.0 x 106 CD34+ cells/kg cannot be obtained even after multiple blood apheresis procedures. Such lower transplant cell doses generally lead to delayed patient recoveries following the transplant. Study Design and Rationale
The trial will be conducted at three to four clinical sites and will enroll a minimum of 80 patients with Stage II-IV breast cancer who have undergone ablative chemotherapy and require a stem cell transplant. The trial format is an extension of the feasibility trial with the addition of a randomized control group of patients. Patients will be randomized to either receive a targeted dose of PBSC, generally collected through multiple blood apheresis procedures, or stem cells produced with the AastromReplicell(TM) System in combination with a low dose of PBSC, collected from a single apheresis procedure. Reduction in cell collection and apheresis procedures, and recovery of the patient's blood and immune system function within an equivalent recovery period to that provided with standard methods are, respectively, the primary efficacy and safety endpoints for the study. As secondary endpoints, the study will evaluate the number of days that the patient is at significant risk of infection following the transplant (febrile neutropenia), and the level of tumor cell contamination in AastromReplicell(TM) System-produced cells in comparison to cells collected through the standard PBSC apheresis method. Clinical Impact of the AastromReplicell(TM) System
The AastromReplicell(TM) System is an automated clinical system designed to be used on-site by hospital personnel to produce therapeutic cells from small starting quantities. By combining AastromReplicell(TM) System-produced cells with a dose of PBSC obtained from a single blood apheresis procedure, this procedure may provide an efficient and consistent method for stem cell therapy, with more predictable treatment schedules. In addition, because the procedure can be performed with a very low dose of PBSC, it may enable the treatment of certain patients who might not otherwise be eligible for stem cell transplants due to the inability to obtain a sufficient quantity of cells even after multiple apheresis procedures. The AastromReplicell(TM) System procedure may also reduce the incidence of tumor cell contamination in the transplant by reducing the overall large-volume cell collection apheresis requirement.
Aastrom Biosciences, Inc. is pioneering the development of proprietary clinical systems including the AastromReplicell(TM) System, a first of its kind product, to enable physicians and patients greater accessibility to cells used for therapy. The AastromReplicell(TM) System product line consists of an instrumentation platform that can operate a growing number of patient specific therapy kits tailored to each cell therapy application. Aastrom has received patents covering methods and devices for the ex vivo production of human stem and other types of cells, as well as for the genetic modification of stem cells. The AastromReplicell(TM) System is an experimental device under development, and is not available for sale at this time in the U.S.
This document contains forward-looking statements, including without limitation, statements concerning clinical trial results, product development objectives, commercial introduction, and potential advantages of the AastromReplicell(TM) System, which involve certain risks and uncertainties. The forward-looking statements are also identified through use of the words "anticipates," "believes," "expects," "plans," and other words of similar meaning. Actual results may differ significantly from the expectations contained in the forward-looking statements. Among the factors that may result in differences are the uncertainties inherent in clinical trial and development activities, regulatory approval requirements, availability of resources and the degree to which the Company's products achieve market acceptance. These and other significant factors are discussed in greater detail in Aastrom's Annual Report on Form-10K and other filings with the Securities and Exchange Commission.
/CONTACT: Todd E. Simpson, VP Finance & Administration, CFO of Aastrom Biosciences, Inc., 734-930-5777 or Investor & Media: Francesca T. DeVellis of Feinstein Kean Partners Inc., 617-577-8110/
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