Abstract：
:We examined the effect of gamma-irradiation (4 Gy) alone or combined with estrogen (17beta-estradiol 15 microM) treatment on the radiation response of stromal fibroblasts from cervical tumors. The fibroblasts were derived from tumors of 9 younger (<50 years) and 9 older (>50 years) cervical cancer patients. A normal fibroblast GSH+/+ cell strain was used as a reference cell. The end-points examined 2 days after irradiation were cell cycle distribution and apoptosis as measured of the cellular response to gamma-radiation. The response of examined fibroblast groups to gamma-rays alone was comparable but apoptotic death was more marked in fibroblasts derived from the younger patients with TNM 1+2 tumors than from the older ones. There was a considerable estrogen effect on the response to gamma-rays that differed between stromal fibroblasts from the examined age groups and was dependent on the tumor stage. In particular, we found a marked decrease in the number of apoptotic cells and debris after estrogen + irradiation, as compared to irradiation alone, only in younger patients and TNM 1+2 tumors. These results indicate that the response of stromal fibroblasts to gamma-rays to a considerable extent depends on donors age and tumor stage. Since stromal fibroblasts have been used for prediction of normal tissue late effects in patients treated with radiotherapy, we conclude that they may not be an adequate model for this purpose.
journal_name
Neoplasmajournal_title
Neoplasmaauthors
Gasinska A,Adamczyk A,Kojs Z,Szumiel Isubject
Has Abstractpub_date
2004-01-01 00:00:00pages
285-92issue
4eissn
0028-2685issn
1338-4317journal_volume
51pub_type
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