Zusammenfassung
Hodgkin-Lymphome (HL) sind die häufigsten nodalen Lymphome in Europa. Die von B-Zellen abstammenden Hodgkin-Reed-Sternberg- (HRS-) Zellen zeigen einen nahezu vollständigen Verlust ihres B-Zell-Phänotyps. In etwa 40% aller HL ist das Epstein-Barr-Virus (EBV) nachweisbar. Für Vorläufer der HRS-Zellen stellt EBV wahrscheinlich einen Schutz vor Apoptose dar. Histologisch finden sich nur einzelne HRS-Zellen in einem gemischtzellulären entzündlichen Infiltrat. Das Zusammenspiel zwischen den HRS-Zellen und diesem zellulären Infiltrat ist für HL von zentraler Bedeutung, die sich in einer Vielzahl von parakrinen Aktivierungsmechanismen widerspiegelt. Daneben sind auch zahlreiche autokrine Stimulationsmechanismen in HRS-Zellen bekannt. Die aberrante Expression und Aktivierung 7 verschiedener Rezeptor-Tyrosinkinasen in HL stellt dabei einen Aktivierungsmechanismus von besonderem Interesse dar, da eine Reihe verschiedener Antikörper und niedermolekularer Substanzen zur Inhibition von Rezeptor-Tyrosinkinasen bereits klinisch zur Therapie verschiedenster Tumorentitäten eingesetzt wird. Die Blockade von Rezeptor-Tyrosinkinasen könnte daher auch in HL eine neue Therapieoption darstellen.
Abstract
Hodgkin lymphoma (HL) is the most frequent nodal lymphoma in Europe. The B-cell derived Hodgkin-Reed Sternberg (HRS) cells are nearly completely deficient for expression of B-cell markers. Epstein-Barr virus (EBV) can be detected in about 40% of HL cases. Presumably, EBV protects HRS cell precursors from apoptosis. Histologically only single HRS cells are dispersed in a broad reactive cellular background. Interactions between HRS cells and their surrounding cellular infiltrate, among them paracrine activation of several signalling pathways, is crucial in HL. HRS cells also show autocrine activation of several signalling pathways. Among these, the aberrant expression and activation of seven different receptor tyrosine kinases (RTK) is of special interest, as many different antibodies and low molecular substances which inhibit RTK activity are already in clinical use for anticancer therapy. Therefore, blocking of RTK activities in HL may be a novel therapeutic option.
Abbreviations
- CCL28:
-
Chemokinrezeptorligand 28
- cHL:
-
Klassisches Hodgkin-Lymphom
- EBF:
-
„Early B cell factor“
- EBV:
-
Epstein-Barr-Virus
- EGFR:
-
„Epidermal growth factor receptor“
- EPHB1:
-
„Ephrin type B receptor 1“
- FLT3:
-
„FMS-related tyrosine kinase 3“
- HER2:
-
„Human epidermal growth receptor 2“
- HL:
-
Hodgkin-Lymphom
- HRS-Zellen:
-
Hodgkin-Reed-Sternberg-Zellen
- ID:
-
„Inhibitor of DNA-binding“
- IL:
-
Interleukin
- JAK:
-
Januskinase
- LMP-1:
-
„Late membrane protein 1“
- lpHL:
-
Lymphozyten-prädominantes Hodgkin-Lymphom
- NF-κB:
-
Nukleärer Faktor kappa B
- NGFβ:
-
„Nerve growth factor beta“
- PDGFRA:
-
„Platelet-derived growth factor receptor“
- PI3K:
-
Phosphatidylinositol-3-Kinase
- RTK:
-
Rezeptor-Tyrosinkinasen
- SOCS:
-
„Suppressor of cytokine signaling“
- STAT:
-
„Signal transducers and activators of transcription“
- TARC:
-
„Thymus and activation regulated chemokine“
- TIE1:
-
„Tyrosin kinase with Ig and EGF homology domain“
- TK:
-
Tyrosinkinase
- TNF-α:
-
Tumor-Nekrose-Faktor alpha
- TRKA:
-
„Tropomyosine related kinase A“
- TRKB:
-
„Tropomyosine related kinase B“
- WHO:
-
World Health Organisation
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Renné, C., Hansmann, M. & Bräuninger, A. Rezeptor-Tyrosinkinasen in Hodgkin-Lymphomen als mögliche Angriffspunkte neuer Therapieoptionen. Pathologe 30, 393–400 (2009). https://doi.org/10.1007/s00292-009-1157-9
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DOI: https://doi.org/10.1007/s00292-009-1157-9