Flow cytometric determination of the time of metastasis during fractionated radiation therapy of the rat rhabdomyosarcoma R1H.
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Flow cytometric determination of the time of metastasis during fractionated radiation therapy of the rat rhabdomyosarcoma R1H. / Baumann, M; Becker, S; Krüger, H J; Vogler, H; Maurer, T; Beck-Bornholdt, Hans-Peter.
in: INT J RADIAT BIOL, Jahrgang 58, Nr. 2, 2, 1990, S. 361-369.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Flow cytometric determination of the time of metastasis during fractionated radiation therapy of the rat rhabdomyosarcoma R1H.
AU - Baumann, M
AU - Becker, S
AU - Krüger, H J
AU - Vogler, H
AU - Maurer, T
AU - Beck-Bornholdt, Hans-Peter
PY - 1990
Y1 - 1990
N2 - A technique is presented for determining the time of metastasis during fractionated radiation therapy of the rat rhabdomyosarcoma R1H by flow cytmetric DNA index measurements. The DNA index is the relative DNA content of the tumour cells compared with normal cells. The DNA index of the highly hyperploid R1H tumour decreases linearly during radiation therapy dependent on the total dose applied, with a rate of 0.22% per Gy. Since metastatic cells escape further irradiation, their DNA index should correspond to the DNA index at time of spread. If so, cells disseminated late during a course of fractionated irradiation are expected to produce symptoms later and to have a lower DNA index compared with cells that metastasized at the start of treatment. The results obtained fitted these expectations, showing that timing of metastases by DNA flow cytometry, in principle, is possible. A first application of this method indicates that the risk per clonogenic R1H tumour cell to matastasize increases during fractionated irradiation.
AB - A technique is presented for determining the time of metastasis during fractionated radiation therapy of the rat rhabdomyosarcoma R1H by flow cytmetric DNA index measurements. The DNA index is the relative DNA content of the tumour cells compared with normal cells. The DNA index of the highly hyperploid R1H tumour decreases linearly during radiation therapy dependent on the total dose applied, with a rate of 0.22% per Gy. Since metastatic cells escape further irradiation, their DNA index should correspond to the DNA index at time of spread. If so, cells disseminated late during a course of fractionated irradiation are expected to produce symptoms later and to have a lower DNA index compared with cells that metastasized at the start of treatment. The results obtained fitted these expectations, showing that timing of metastases by DNA flow cytometry, in principle, is possible. A first application of this method indicates that the risk per clonogenic R1H tumour cell to matastasize increases during fractionated irradiation.
M3 - SCORING: Zeitschriftenaufsatz
VL - 58
SP - 361
EP - 369
JO - INT J RADIAT BIOL
JF - INT J RADIAT BIOL
SN - 0955-3002
IS - 2
M1 - 2
ER -