Hamostaseologie 2005; 25(03): 301-310
DOI: 10.1055/s-0037-1619664
Original Article
Schattauer GmbH

Tumorassoziierte Prognosefaktoren der Plasminogenaktivator-Familie

Bestimmung und klinische Wertigkeit von u-PA, t-PA, PAI-1 und PAI-2Tumor-associated prognostic factors of the plasminogen activator familydetermination and clinical value of u-PA, t-PA, PAI-1, and PAI-2
K. Mengele
1   Klinische Forschergruppe der Frauenklinik (Direktorin: Prof. Dr. Marion Kiechle) der Technischen Universität München
,
N. Harbeck
1   Klinische Forschergruppe der Frauenklinik (Direktorin: Prof. Dr. Marion Kiechle) der Technischen Universität München
,
U. Reuning
1   Klinische Forschergruppe der Frauenklinik (Direktorin: Prof. Dr. Marion Kiechle) der Technischen Universität München
,
V. Magdolen
1   Klinische Forschergruppe der Frauenklinik (Direktorin: Prof. Dr. Marion Kiechle) der Technischen Universität München
,
M. Schmitt
1   Klinische Forschergruppe der Frauenklinik (Direktorin: Prof. Dr. Marion Kiechle) der Technischen Universität München
› Author Affiliations
Further Information

Publication History

Publication Date:
27 December 2017 (online)

Zusammenfassung

Proteolysefaktoren aus der Plasminogenaktivator-Familie (Plasmin, t-PA, u-PA, u-PAR, PAI-1, PAI-2), die an Blutgerinnung und Abbau von Blutgerinnseln beteiligt sind, kommen in gesunden und Krebszellen (z. B. der Niere, Lunge, Leber, Brust, Prostata, des Ovars, Gehirns und Magen-Darmtrakts) vor und sind dort an Neuronalentwicklung, Blutgefäßausbreitung und Wundheilung sowie der Plazentabildung und Embryonalentwicklung beteiligt. Diese Proteolysefaktoren sind im malignen Gewebe oft in größerer Menge als im Normalgewebe der befallenen Organe anzutreffen. Bei Brustkrebspatientinnen geht ein hoher Gehalt des Plasminogenaktivators u-PA, des Plasminogenaktivator-Inhibitors PAI-1 und des u-PA-Rezeptors u-PAR (CD87) im Tumorgewebe mit erhöhter Tumoraggressivität und schlechter Prognose einher, ein erhöhter Gehalt des Plasminogenaktivators t-PA und des Inhibitors PAI-2 jedoch mit einer guten Prognose. Zur klinisch relevanten Bestimmung dieser Proteolysefaktoren im Tumorgewebeextrakt werden enzymimmunometrische ELISA-Tests empfohlen. Die enzymatische und zymographische Aktivität dieser Faktoren wird nur im Rahmen experimenteller, vorklinischer Untersuchungen bestimmt.

Summary

Proteolytic factors belonging to the plasminogen activator family (plasmin, u-PA, t-PA, u-PAR, PAI-1, and PAI-2), which usually are involved in blood clotting and degradation of blood clots, are also present in healthy and diseased tissue of the kidney, lung, liver, gastro-intestinal tract, breast, prostate, ovary, and brain. These factors are engaged in brain development, angiogenesis and vascular invasion, wound healing as well as in placenta development and embryogenesis. Plasminogen activators u-PA and t-PA, their inhibitors PAI-1 and PAI-2, and the u-PA-receptor (u-PAR, CD87) are often elevated in solid malignant tumour tissues compared to their normal counterparts. In breast cancer patients, an elevated tumour tissue extract antigen content of u-PA, PAI-1, and u-PAR is associated with increased tumour aggressiveness and poor prognosis; in contrary, an elevated content of t-PA and PAI-2 indicates a favourable prognosis. For clinical relevant determination of these proteolytic factors in tumour tissue extracts, only enzymo-immunometric tests (ELISA) are recommended. Enzymometric and enzymographic tests are actually conducted only in an experimental, preclinical context.

 
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