Late proliferating and inflammatory effects on murine microvascular heart and lung endothelial cells after irradiation

Wolfgang Sievert, Klaus Rüdiger Trott, Omid Azimzadeh, Soile Tapio, Horst Zitzelsberger, Gabriele Multhoff

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

46 Zitate (Scopus)

Abstract

Background and purpose Radiotherapy of thoracic tumors increases the risk to develop cardiac diseases at later time-points. We compared time kinetics of radiation-induced changes of surface markers related to proliferation, progenitor cell development and inflammation in lung and heart microvascular endothelial cells (ECs). Material and methods Mice received local thorax irradiation with a single dose of 0, 2 or 8 Gy. Following magnetic bead separation and biotin-streptavidin competition, cell surface markers of isolated ECs from the lung and heart were analyzed 5, 10, 15 and 20 weeks after irradiation by flow cytometry. Results Irradiation with 8 Gy resulted in a temporary and differential up-regulation of proliferation markers (HCAM, Integrin β-3, Endoglin, VE-cadherin, VEGFR-2) on ECs. Mucosialin a progenitor marker increased in lung ECs 15-20 weeks and inflammatory markers (PECAM-1, ICAM-1, ICAM-2, VCAM-1) started to increase 10 weeks after thorax irradiation with 8 Gy. Interestingly, ICAM-1 and VCAM-1 remained up-regulated 20 weeks after irradiation in heart and lung ECs. Conclusions The persistently elevated expression density of ICAM-1 and VCAM-1 on ECs may suggest that an irradiation at 8 Gy induces late inflammatory responses in heart and lung ECs.

OriginalspracheEnglisch
Seiten (von - bis)376-381
Seitenumfang6
FachzeitschriftRadiotherapy and Oncology
Jahrgang117
Ausgabenummer2
DOIs
PublikationsstatusVeröffentlicht - 1 Nov. 2015

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