Relationship between aberration yield and mitotic delay in human lymphocytes exposed to 200 MeV/u Fe-ions or X-rays. Export

@article{citeulike:5973716, abstract = {The time-course of Fe-ion (200 MeV/u, 440 keV/microm) and X-ray induced chromosomal damage was investigated in human lymphocytes. After cells were exposed in G0 and stimulated to grow, aberrations were measured in first-cycle metaphases harvested 48, 60 and 72 h post-irradiation. Additionally, lesions were analysed in G2 and mitotic (M) cells collected at 48 h using calyculin A-induced premature chromosome condensation (PCC). Following X-irradiation, similar aberration yields were found in all of the samples scored. In contrast, after Fe-ion exposure a drastic increase in the aberration frequency with sampling time was observed, i.e. cells arriving late at the first mitosis carried more aberrations than those arriving at earlier times. The PCC data indicate that the delayed entry of heavily damaged cells into mitosis observed after Fe-ion irradiation resulted from a prolonged arrest in G2. Altogether these experiments provide further evidence that in the case of high-LET exposure cell-cycle delays of severely damaged cells have to be taken into account for any meaningful quantification of chromosomal damage and, consequently, for an accurate estimate of the RBE.}, author = {Ritter, Sylvia and Nasonova, Elena and Furusawa, Yoshiya and Ando, Koichi}, citeulike-article-id = {5973716}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/12793754}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=12793754}, issn = {0449-3060}, journal = {Journal of radiation research}, keywords = {fe-ion, lymphocytes}, month = {December}, posted-at = {2009-10-20 13:12:36}, priority = {2}, title = {Relationship between aberration yield and mitotic delay in human lymphocytes exposed to 200 MeV/u Fe-ions or X-rays.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/12793754}, volume = {43 Suppl}, year = {2002} }

TY - JOUR ID - citeulike:5973716 L3 - citeulike-article-id:5973716 N2 - The time-course of Fe-ion (200 MeV/u, 440 keV/microm) and X-ray induced chromosomal damage was investigated in human lymphocytes. After cells were exposed in G0 and stimulated to grow, aberrations were measured in first-cycle metaphases harvested 48, 60 and 72 h post-irradiation. Additionally, lesions were analysed in G2 and mitotic (M) cells collected at 48 h using calyculin A-induced premature chromosome condensation (PCC). Following X-irradiation, similar aberration yields were found in all of the samples scored. In contrast, after Fe-ion exposure a drastic increase in the aberration frequency with sampling time was observed, i.e. cells arriving late at the first mitosis carried more aberrations than those arriving at earlier times. The PCC data indicate that the delayed entry of heavily damaged cells into mitosis observed after Fe-ion irradiation resulted from a prolonged arrest in G2. Altogether these experiments provide further evidence that in the case of high-LET exposure cell-cycle delays of severely damaged cells have to be taken into account for any meaningful quantification of chromosomal damage and, consequently, for an accurate estimate of the RBE. JF - Journal of radiation research SN - 0449-3060 TI - Relationship between aberration yield and mitotic delay in human lymphocytes exposed to 200 MeV/u Fe-ions or X-rays. VL - 43 Suppl KW - fe-ion KW - lymphocytes AU - Ritter, Sylvia AU - Nasonova, Elena AU - Furusawa, Yoshiya AU - Ando, Koichi PY - 2002/12// UR - http://view.ncbi.nlm.nih.gov/pubmed/12793754 ER -