Abstract
Tumor hypoxia is a major factor inducing resistance to radiotherapy. Spatial limitation in oxygen (O2) diffusion usually leads to chronic hypoxia, whereas temporary shut-down of perfusion or fluctuations in red blood cell flux can cause acute hypoxia. Since the role of temporal heterogeneity of pO2 in acute hypoxia during radiotherapy remains unclear, this study focuses on analyzing the influence of temporal heterogeneity of tumor hypoxia upon radiotherapy by modeling the temporal variance of acute hypoxia. The computational simulation was conducted on digital 2D tumor phantoms. The O2 diffusion and consumption within the tumor tissues were calculated using the reaction-diffusion equation. A total of nine experimental tumor lines (FaDu, GL, C3H, RIF, SCCVII, KHT, MEF, MTG, HT29) were modeled according to known pO2 distributions. Each tumor line was first simulated 36 times with various temporal heterogeneities (dynamic hypoxia) and once again without temporal heterogeneity (static hypoxia). Temporal pO2 fluctuations were modeled according to known red blood cell (RBC) fluxes. All tumor phantoms were irradiated with 30 fractions of 2 Gy. Cell survival was calculated as a function of pO2 and radiation dose via linear quadratic model. The simulation results indicate that the temporal heterogeneity varies with different tumor types, and tumor line HT29 shows the most significant impact of temporal heterogeneity upon the treatment effect. The ratio between the surviving fractions without and with temporal variance ranges from 1.44 to 6.28. Given the same mean pO2, the fraction of killed tumor cells in dynamic hypoxia is higher than in static hypoxia. A temporal heterogeneity index (THI) denoting normalized average pO2 temporal variance is proposed. The results show that for similar mean tumor pO2, a strong inverse correlation between THI and the surviving fraction is observed for each tumor line. THI is highly proportional to the fraction of acute hypoxia and to the RBC flux. The proposed THI corresponds well to the fraction of acute hypoxia.
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References
Vaupel P, Kallinowski F, Okunieff P (1989) Blood flow, oxygen and nutrient supply, and metabolic microenvironment of human tumors: a review. Cancer Res 49:6449–6465
Vaupel P, Harrison L (2004) Tumor hypoxia: causative factors, compensatory mechanisms, and cellular response. Oncologist 9:4–9
Moeller BJ, Richardson RA, Dewhirst MW (2007) Hypoxia and radiotherapy: opportunities for improved outcomes in cancer treatment. Cancer Metastasis Rev 26:241–248
Vaupel P (2004) The role of hypoxia-induced factors in tumor progression. Oncologist 9:10–17
Bayer C, Shi K, Astner ST et al (2011) Acute versus chronic hypoxia: why a simplified classification is simply not enough. Int J Radiat Oncol Biol Phys 80:965–968
Toma-Daşu I, Daşu A, Karlsson M (2004) The relationship between temporal variation of hypoxia, polarographic measurements and predictions of tumour response to radiation. Phys Med Biol 49:4463
Bruley DF (1993) Modeling oxygen transport: development of methods and current state. Adv Exp Med Biol 345:33–42
Toma-Daşu I, Uhrdin J, Antonovic L et al (2012) Dose prescription and treatment planning based on FMISO-PET hypoxia. Acta Oncol 51:222–230
Toma-Daşu I, Daşu A (2013) Modelling tumour oxygenation, reoxygenation and implications on treatment outcome. Comput Math Methods Med 2013:1–9
Yang Y, Xing L (2005) Towards biologically conformal radiation therapy (BCRT): selective IMRT dose escalation under the guidance of spatial biology distribution. Med Phys 32:1473–1484
Thorwarth D, Eschmann S-M, Paulsen F et al (2007) Hypoxia dose painting by numbers: a planning study. Int J Radiat Oncol Biol Phys 68:291–300
Petit SF, Dekker AL, Seigneuric R et al (2009) Intra-voxel heterogeneity influences the dose prescription for dose-painting with radiotherapy: a modelling study. Phys Med Biol 54:2179–2196
Adam MF, Dorie MJ, Brown JM (1999) Oxygen tension measurements of tumors growing in mice. Int J Radiat Oncol Biol Phys 45:171–180
Wang Q, Vaupel P, Ziegler SI et al (2015) Exploring the quantitative relationship between metabolism and enzymatic phenotype by physiological modeling of glucose metabolism and lactate oxidation in solid tumors. Phys Med Biol 60:2547–2571
Mönnich D, Troost EG, Kaanders JH et al (2011) Modelling and simulation of [18F] fluoromisonidazole dynamics based on histology-derived microvessel maps. Phys Med Biol 56:2045–2057
Daşu A, Toma-Daşu I, Karlsson M (2003) Theoretical simulation of tumour oxygenation and results from acute and chronic hypoxia. Phys Med Biol 48:2829
Tannock IF (1972) Oxygen diffusion and the distribution of cellular radiosensitivity in tumours. Br J Radiol 45:515–524
Goldman D (2008) Theoretical models of microvascular oxygen transport to tissue. Microcirculation 15:795–811
Wouters BG, Brown JM (1997) Cells at intermediate oxygen levels can be more important than the “hypoxic fraction” in determining tumor response to fractionated radiotherapy. Radiat Res 147:541–550
Maftei C, Bayer C, Shi K et al (2011) Quantitative assessment of hypoxia subtypes in microcirculatory supply units of malignant tumors using (immuno-) fluorescence techniques. Strahlenther Onkol 187:260–266
Maftei C, Bayer C, Shi K, et al. (2012) Intra- and intertumor heterogeneities in total, chronic, and acute hypoxia in xenografted squamous cell carcinomas. Strahlenther Onkol 188:606–615
Michiels C, Tellier C, Feron O (2016) Cycling hypoxia: a key feature of the tumor microenvironment. Biochim Biophys Acta 1866:76–86
Kato Y, Yashiro M, Fuyuhiro Y et al (2011) Effects of acute and chronic hypoxia on the radiosensitivity of gastric and esophageal cancer cells. Anticancer Res 31:3369–3375
Bayer C, Vaupel P (2012) Acute versus chronic hypoxia in tumors. Strahlenther Onkol 188:616–627
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Xu, L., Vaupel, P., Menze, B.H., Shi, K. (2018). Impact of Temporal Heterogeneity of Acute Hypoxia on the Radiation Response of Experimental Tumors. In: Thews, O., LaManna, J., Harrison, D. (eds) Oxygen Transport to Tissue XL. Advances in Experimental Medicine and Biology, vol 1072. Springer, Cham. https://doi.org/10.1007/978-3-319-91287-5_30
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DOI: https://doi.org/10.1007/978-3-319-91287-5_30
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