[Authorization of tissue and blood stem cell preparations for hematopoietic reconstitution: Documentation of clinical and nonclinical data in a central expert report]. / Genehmigungsverfahren für Gewebezubereitungen und Blutstammzellzubereitungen zur hämatopoetischen Rekonstitution: Dokumentation klinischer und nicht klinischer Daten mittels eines Zentralgutachtens.

In order to address the European Directive 2004/23 on human tissues and cells, the authorization obligation for tissue and blood stem cell preparations was introduced (§ 21a AMG) in the year 2007 in the German medicinal products act. Stem cell transplantation for hematopoietic reconstitution has been in use for decades and is well established for the treatment of many malignancies. The manufacture of stem cell preparations varies, but in terms of hematopoietic reconstitution, different products are intended for the same indication. Taking these aspects into account, it was considered inappropriate that every single applicant should provide their own documentation, including an expert report on clinical and nonclinical data. Consequently, the idea came up to create a central expert report, to which all applicants could refer and would include relevant clinical and nonclinical data according to current knowledge. A central expert report was therefore generated, called the "Gemeinsame Stellungnahme der Fachgesellschaften Deutsche Gesellschaft für Transfusionsmedizin und Immunhämatologie (DGTI), Deutsche Gesellschaft für Hämatologie und Onkologie (DGH) und Gesellschaft für Pädiatrische Onkologie und Hämatologie (GPOH)". Applicants are allowed to refer to this central expert report provided their stem cell product is comparable with the cell preparations included in the report. In order to represent current knowledge, the content of the central expert report was already reworked once, but should be updated regularly.

Report on Notifications Pursuant to section sign21 German Transfusion Act for 2007.

The present report contains the data collected in 2007, pursuant to Section 21 German Transfusion Act, and an analysis of the supply situation over the past 8 years. As in previous years, all blood donation centres located in Germany transmitted data on the collection, manufacture, import and export of blood components for transfusion. According to these data, a total of 6.7 million blood collections were performed in 2007. With 4.7 million, the portion of whole blood donations was at the level of previous years, whereas the number of apheresis donations rose again, to 1.9 million. The portion of autologous blood collections accounts for only 1.1% and thus continues to decline. Since 2003, the number of red blood cell concentrates prepared has been a constant 4.5 million transfusion units. The decay of red blood cell concentrates on the user side in 2000 accounted for 5% while in 2007 it was just above 3%, referred to the total quantity of data reported as transfused and decayed. The manufacture of platelet concentrates rose from 366,000 to 480,000 transfusion units between 2003 and 2007. The production of therapeutic single plasmas, too, markedly increased in 2007 (to 1.2 million transfusion units). In 2007, 2.2 million I of plasma for fractionation were collected in Germany. In addition, 1.0 million I were imported, and 1.8 million I were exported. The quantity available in Germany from a pure arithmetic point of view of 1.4 million I was almost entirely allocated to basic fractionation so that a sufficient plasma supply can be assumed. Due to the fact that manufacturing capacities are still lacking in Germany, recombinant factors need to be imported in their entirety. Since 2003, Germany has by far been the leader in Europe with more than 20 I of fractionation plasma collected per 1,000 inhabitants. Furthermore, regarding the manufacturing figures of red blood cell concentrates, platelet concentrates, and therapeutic single plasma, Germany is in the top third for all these products compared with other European countries. The manufacture of allogeneic stem cell products for haematopoietic reconstitution, obtained by apheresis, has continuously risen to 4,700. A large portion of this (1,810 transplants) could be exported while only a small number (179 preparations) had to be imported. The manufacture of autologous stem cell preparations from cord blood has risen drastically to more than 10,000 in 2007. The interest in the figures collected in compliance with Section 21, German Transfusion Act remains high both in Germany and at an international level. Meanwhile reliable data are available.

Microbial safety of cell based medicinal products--what can we learn from cellular blood components?

Today, sterility of established parenteral drugs including biologicals, such as plasma derived products, is practically guaranteed. Bacterially contaminated products are extremely rare exceptions owing to the efficiency of the manufacturing processes in the pharmaceutical industry. In contrast, the manufacturing processes of cell based medicinal products or tissue preparations show much less defined conditions. The sterility of source materials cannot be guaranteed in many cases. As a rule, these source materials cannot be sterilised, as it holds true for the final products. Furthermore, the established methods for sterility testing are not applicable for cell preparations. Sterility of a restricted sample does not guarantee sterility of the whole preparation. Thus, small amounts of residual bacteria in the product can be overlooked and can grow up to enormous numbers during storage and shipping of cell based medicinal products. Considering these problems, there are some parallels in the warranty of microbial safety of cellular blood components. Therefore, the experiences collected in transfusion medicine in the past decade can be successfully used in the production of cell based medicinal products. Comparable to the situation regarding cellular blood components, there is a need for new principles in rapid bacteria detection.