Der Grundsatz der regenerativen Medizin in der Arthrosebehandlung verfolgt eine funktionelle
Wiederherstellung von Knorpelgewebe statt nur Reparatur von Knorpeldefekten. Mit dem
Einsatz von Blutprodukten sollen chronische Entzündungsprozesse gehemmt und Geweberegeneration
gefördert werden. Stammzelltherapien basieren in der Arthrosetherapie häufig auf mesenchymalen
Stammzellen aus Fettgewebe oder Knochenmarkaspirat. Extrazelluläre Vesikel als mögliche
Botenstoffe der Regeneration könnten Wirkmechanismen erklären.
Abstract
The principle of regenerative medicine in the treatment of osteoarthritis pursues
a functional restoration of cartilage tissue instead of just repairing cartilage defects.
The use of blood products is intended to inhibit chronic inflammatory processes and
promote tissue regeneration. Intraarticular injection of autologous platelet-rich
plasma (PRP) is a prominent procedure. Clinical evidence supports PRP injection over
hyaluronic acid or glucocorticoid injection. Comparability of studies is difficult
due to missing standardisation of production procedures, dosing and donor variability.
In particular, whether presence of residual leukocytes is required or should be avoided
is an open debate. In contrast, stem cell therapies in osteoarthritis therapy are
often based on mesenchymal stem cells (MSC) from adipose tissue or bone marrow aspirate.
Different sources of MSC might render the cells more suitable for application in a
given context. Nevertheless, it became evident that
their secretome rather than the cells themselves are responsible for observed regenerative
processes. Research on the mechanisms of action have focused on growth factors. However,
an overlooked component of blood products called extracellular vesicles (EV) came
to the center of attention, which are also released by MSC as intercellular signal
carriers. EV cargo molecules such as miRNAs open up new dimensions in the investigation
and explanation of clinically observed anti-inflammatory and regenerative effects.
Schlüsselwörter
Platelet-rich Plasma - mesenchymale Stammzellen - extrazelluläre Vesikel - Knorpelgewebe
Keywords
platelet-rich plasma - mesenchymal stem cells - extracellular vesicle - cartilage
tissue