Dose-survival relationship for epithelial cells of human skin after multifraction irradiation: evaluation by a quantitative method in vivo

Journal Article · Tue Jul 01 00:00:00 EDT 1980 · Int. J. Radiat. Oncol., Biol. Phys.; (United States)

DOI:https://doi.org/10.1016/0360-3016(80)90321-1· OSTI ID:6757913

Arcangeli, G ^[1]; Mauro, F; Nervi, C; Withers, H R

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1. Istituto Medico Scientifico, Rome Italy

The dose-survival relationship for normal epithelial cells after single and fractionated radiation exposures has been established by Withers for the mouse, but it is not available for humans according to a strict criterion for survival of single cell reproductive integrity. In an attempt to obtain such a quantitative estimation, 2 patients requiring radical radiation therapy to the chest wall were treated according to particular Multiple Daily Fractionation (MDF) protocols: i) 250 + 150 + 150 rad/day, 4 hr interval, 5 days/week; and ii) 150 + 150 + 150 + 150 rad/day, 3.5 hr interval, 5 days/week. In both cases, different strips of skin received different total doses: 6300, 6850, and 7150 rad, and 6300, 6750, and 7200 rad, respectively. In case (i), moist desquamation appeared and thereafter repopulating colonies of epithelium could be recognized and counted. Using these counts a survival curve having a D/sub o/ value of 490 +- 150 rad was estimated according to the formula proposed by Withers. In case (ii), no moist desquamation was reached at the doses delivered. The difference observed may imply that the initial region of the survival curve deviates appreciably from exponential between doses of 150 and 250 rad. If such is the case, a /sub 1/D/sub o/ value of 490 rad may represent an underestimate. These results are discussed from the point of view of both the shape of the survival curve and the effectiveness of nonconventional fractionation courses.

• OSTI ID: 6757913
• Journal Information: Int. J. Radiat. Oncol., Biol. Phys.; (United States), Vol. 6:7
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
62 RADIOLOGY AND NUCLEAR MEDICINE
59 BASIC BIOLOGICAL SCIENCES
ANIMAL CELLS
RADIOSENSITIVITY
EPITHELIUM
BIOLOGICAL RADIATION EFFECTS
SKIN
CFU
DOSE-RESPONSE RELATIONSHIPS
FRACTIONATED IRRADIATION
IN VIVO
LINEAR ACCELERATORS
MEV RANGE 01-10
PATIENTS
RADIATION DOSES
SURVIVAL CURVES
ACCELERATORS
ANIMAL TISSUES
BIOLOGICAL EFFECTS
BODY
DOSES
ENERGY RANGE
IRRADIATION
MEV RANGE
ORGANS
RADIATION EFFECTS
TISSUES
560151* - Radiation Effects on Animals- Man
550603 - Medicine- External Radiation in Therapy- (1980-)
550300 - Cytology