Radiobiology of ultrasoft X rays. IV. Flat and round-shaped hamster cells (CHO-10B, HS-23)

S. Carpenter; M. N. Cornforth; W. F. Harvey; M. R. Raju; M. E. Schillaci; M. E. Wilder; D. T. Goodhead

doi:10.2307/3577523

Radiobiology of ultrasoft X rays. IV. Flat and round-shaped hamster cells (CHO-10B, HS-23)

S. Carpenter, M. N. Cornforth, W. F. Harvey, M. R. Raju, M. E. Schillaci, M. E. Wilder, D. T. Goodhead

Research output: Contribution to journal › Article

37 Scopus citations

Abstract

The results reported earlier in this series indicated that the relative biological effectiveness (RBE) of ultrasoft X rays decreases with decreasing cell thickness, approaching unity for the thinnest cells used, plateau-phase human skin fibroblasts (HSF). The possible dependence of RBE on the configuration of the cell nucleus is investigated further in this paper using two CHO cell lines that attach well and have similar intrinsic radiosensitivities to ⁶⁰Co γ rays. One of the lines forms monolayers similar to V79 cells, while the other remains more spherical during growth. We find an increasing RBE with decreasing X-ray energy for both of these cell lines, consistent with our results using V79 cells. Also consistent with our results obtained with 10T 1/2 and HSF cells, we find an increasing RBE with increasing cell thickness. The possible dependence of RBE on radiosensitivity and the use of the concept of mean dose for ultrasoft X rays is discussed.

Original language	English (US)
Pages (from-to)	523-533
Number of pages	11
Journal	Radiation research
Volume	119
Issue number	3
DOIs	https://doi.org/10.2307/3577523
State	Published - Jan 1 1989
Externally published	Yes

ASJC Scopus subject areas

Biophysics
Radiation
Radiology Nuclear Medicine and imaging

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Carpenter, S., Cornforth, M. N., Harvey, W. F., Raju, M. R., Schillaci, M. E., Wilder, M. E., & Goodhead, D. T. (1989). Radiobiology of ultrasoft X rays. IV. Flat and round-shaped hamster cells (CHO-10B, HS-23). Radiation research, 119(3), 523-533. https://doi.org/10.2307/3577523

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title = "Radiobiology of ultrasoft X rays. IV. Flat and round-shaped hamster cells (CHO-10B, HS-23)",

abstract = "The results reported earlier in this series indicated that the relative biological effectiveness (RBE) of ultrasoft X rays decreases with decreasing cell thickness, approaching unity for the thinnest cells used, plateau-phase human skin fibroblasts (HSF). The possible dependence of RBE on the configuration of the cell nucleus is investigated further in this paper using two CHO cell lines that attach well and have similar intrinsic radiosensitivities to 60Co γ rays. One of the lines forms monolayers similar to V79 cells, while the other remains more spherical during growth. We find an increasing RBE with decreasing X-ray energy for both of these cell lines, consistent with our results using V79 cells. Also consistent with our results obtained with 10T 1/2 and HSF cells, we find an increasing RBE with increasing cell thickness. The possible dependence of RBE on radiosensitivity and the use of the concept of mean dose for ultrasoft X rays is discussed.",

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AU - Carpenter, S.

AU - Cornforth, M. N.

AU - Harvey, W. F.

AU - Raju, M. R.

AU - Schillaci, M. E.

AU - Wilder, M. E.

AU - Goodhead, D. T.

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N2 - The results reported earlier in this series indicated that the relative biological effectiveness (RBE) of ultrasoft X rays decreases with decreasing cell thickness, approaching unity for the thinnest cells used, plateau-phase human skin fibroblasts (HSF). The possible dependence of RBE on the configuration of the cell nucleus is investigated further in this paper using two CHO cell lines that attach well and have similar intrinsic radiosensitivities to 60Co γ rays. One of the lines forms monolayers similar to V79 cells, while the other remains more spherical during growth. We find an increasing RBE with decreasing X-ray energy for both of these cell lines, consistent with our results using V79 cells. Also consistent with our results obtained with 10T 1/2 and HSF cells, we find an increasing RBE with increasing cell thickness. The possible dependence of RBE on radiosensitivity and the use of the concept of mean dose for ultrasoft X rays is discussed.

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