Helm, Alexander ; Lee, Ryonfa ; Durante, Marco ; Ritter, Sylvia (2016)
The Influence of C-Ions and X-rays on Human Umbilical Vein Endothelial Cells.
In: Frontiers in Oncology, 6
doi: 10.3389/fonc.2016.00005
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Damage to the endothelium of blood vessels, which may occur during radiotherapy, is discussed as a potential precursor to the development of cardiovascular disease. We thus chose human umbilical vein endothelial cells as a model system to examine the effect of low- and high-linear energy transfer (LET) radiation. Cells were exposed to 250 kV X-rays or carbon ions (C-ions) with the energies of either 9.8 MeV/u (LET = 170 keV/μm) or 91 MeV/u (LET = 28 keV/μm). Subculture of cells was performed regularly up to 46 days (~22 population doublings) post-irradiation. Immediately after exposure, cells were seeded for the colony forming assay. Additionally, at regular intervals, mitochondrial membrane potential (MMP) (JC-1 staining) and cellular senescence (senescence-associated β-galactosidase staining) were assessed. Cytogenetic damage was investigated by the micronucleus assay and the high-resolution multiplex fluorescence in situ hybridization (mFISH) technique. Analysis of radiation-induced damage shortly after exposure showed that C-ions are more effective than X-rays with respect to cell inactivation or the induction of cytogenetic damage (micronucleus assay) as observed in other cell systems. For 9.8 and 91 MeV/u C-ions, relative biological effectiveness values of 2.4 and 1.5 were obtained for cell inactivation. At the subsequent time points, the number of micronucleated cells decreased to the control level. Analysis of chromosomal damage by mFISH technique revealed aberrations frequently involving chromosome 13 irrespective of dose or radiation quality. Disruption of the MMP was seen only a few days after exposure to X-rays or C-ions. Cellular senescence was not altered by radiation at any time point investigated. Altogether, our data indicate that shortly after exposure C-ions were more effective in damaging endothelial cells than X-rays. However, late damage to endothelial cells was not found for the applied conditions and endpoints.

Typ des Eintrags:	Artikel
Erschienen:	2016
Autor(en):	Helm, Alexander ; Lee, Ryonfa ; Durante, Marco ; Ritter, Sylvia
Art des Eintrags:	Bibliographie
Titel:	The Influence of C-Ions and X-rays on Human Umbilical Vein Endothelial Cells
Sprache:	Englisch
Publikationsjahr:	20 Januar 2016
Ort:	Lausanne
Verlag:	Frontiers Media S.A.
Titel der Zeitschrift, Zeitung oder Schriftenreihe:	Frontiers in Oncology
Jahrgang/Volume einer Zeitschrift:	6
Kollation:	10 Seiten
DOI:	10.3389/fonc.2016.00005
Zugehörige Links:	TUprints Zweitveröffentlichung
Kurzbeschreibung (Abstract):	Damage to the endothelium of blood vessels, which may occur during radiotherapy, is discussed as a potential precursor to the development of cardiovascular disease. We thus chose human umbilical vein endothelial cells as a model system to examine the effect of low- and high-linear energy transfer (LET) radiation. Cells were exposed to 250 kV X-rays or carbon ions (C-ions) with the energies of either 9.8 MeV/u (LET = 170 keV/μm) or 91 MeV/u (LET = 28 keV/μm). Subculture of cells was performed regularly up to 46 days (~22 population doublings) post-irradiation. Immediately after exposure, cells were seeded for the colony forming assay. Additionally, at regular intervals, mitochondrial membrane potential (MMP) (JC-1 staining) and cellular senescence (senescence-associated β-galactosidase staining) were assessed. Cytogenetic damage was investigated by the micronucleus assay and the high-resolution multiplex fluorescence in situ hybridization (mFISH) technique. Analysis of radiation-induced damage shortly after exposure showed that C-ions are more effective than X-rays with respect to cell inactivation or the induction of cytogenetic damage (micronucleus assay) as observed in other cell systems. For 9.8 and 91 MeV/u C-ions, relative biological effectiveness values of 2.4 and 1.5 were obtained for cell inactivation. At the subsequent time points, the number of micronucleated cells decreased to the control level. Analysis of chromosomal damage by mFISH technique revealed aberrations frequently involving chromosome 13 irrespective of dose or radiation quality. Disruption of the MMP was seen only a few days after exposure to X-rays or C-ions. Cellular senescence was not altered by radiation at any time point investigated. Altogether, our data indicate that shortly after exposure C-ions were more effective in damaging endothelial cells than X-rays. However, late damage to endothelial cells was not found for the applied conditions and endpoints.
Freie Schlagworte:	cardiovascular disease, endothelial cells, high-LET radiation, carbon ions, carbon ion therapy, chromosome 13, micronucleus formation, senescence-associated β-galactosidase
ID-Nummer:	Artikel-ID: 5
Zusätzliche Informationen:	This article is part of the Research Topic: Charged Particles in Oncology Specialty section: This article was submitted to Radiation Oncology, a section of the journal Frontiers in Oncology
Sachgruppe der Dewey Dezimalklassifikatin (DDC):	500 Naturwissenschaften und Mathematik > 530 Physik 600 Technik, Medizin, angewandte Wissenschaften > 610 Medizin, Gesundheit
Fachbereich(e)/-gebiet(e):	05 Fachbereich Physik 05 Fachbereich Physik > Institut für Physik Kondensierter Materie (IPKM)
Hinterlegungsdatum:	12 Mär 2024 07:42
Letzte Änderung:	12 Mär 2024 07:42
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