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Sievert, W. ; Trott, K.-R.* ; Azimzadeh, O. ; Tapio, S. ; Zitzelsberger, H. ; Multhoff, G.

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

Radiother. Oncol. 117, 376-381 (2015)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
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 8Gy. 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 20weeks after irradiation by flow cytometry. RESULTS: Irradiation with 8Gy 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 15-20weeks and inflammatory markers (PECAM-1, ICAM-1, ICAM-2, VCAM-1) started to increase 10weeks after thorax irradiation with 8Gy. Interestingly, ICAM-1 and VCAM-1 remained up-regulated 20weeks 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 8Gy induces late inflammatory responses in heart and lung ECs.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Atherosclerosis ; Endothelial Cells ; Endothelial Progenitor Cells ; Inflammation ; Irradiation ; Proliferation; C57bl/6 Wild-type; Adhesion Molecules; Radiation; Atherosclerosis; Mechanisms; Disease; Damage; Mice; Expression; Vcam-1
ISSN (print) / ISBN 0167-8140
e-ISSN 1879-0887
Journal Radiotherapy and Oncology
Quellenangaben Volume: 117, Issue: 2, Pages: 376-381 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place Clare
Reviewing status Peer reviewed
Institute(s) Institute of Radiation Medicine (IRM)
Translational Metabolic Oncology (IDC-TMO)
Institute of Radiation Biology (ISB)