A comparative study has been performed on the effects of high-dose-rate (DR) X-ray beams produced by a plasma focus device (PFMA-3), to exploit its potential medical applications (e.g. radiotherapy), and low-DR X-ray beams produced by a conventional source (XRT). Experiments have been performed at 0.5 and 2 Gy doses on a human glioblastoma cell line (T98G). Cell proliferation rate and potassium outward currents (IK) have been investigated by time lapse imaging and patch clamp recordings. The results showed that PFMA-3 irradiation has a greater capability to reduce the proliferation rate activity with respect to XRT, while it does not affect IK of T98G cells at any of the dose levels tested. XRT irradiation significantly reduces the mean IK amplitude of T98G cells only at 0.5 Gy. This work confirms that the DR, and therefore the source of radiation, is crucial for the planning and optimisation of radiotherapy applications.
Early effects comparison of x rays delivered at high-dose-rate pulses by a plasma focus device and at low dose rate on human tumour cells / Virelli, A.; Zironi, I.; Pasi, F.; Ceccolini, E.; Nano, R.; Facoetti, A.; Gavoci, E.; Fiore, M. R.; Rocchi, F.; Mostacci, D.; Cucchi, G.; Castellani, G.; Sumini, M.; Orecchia, R.. - In: RADIATION PROTECTION DOSIMETRY. - ISSN 0144-8420. - STAMPA. - 166:1-4(2015), pp. 383-387. [10.1093/rpd/ncv163]
Early effects comparison of x rays delivered at high-dose-rate pulses by a plasma focus device and at low dose rate on human tumour cells
VIRELLI, ANGELA;ZIRONI, ISABELLA;MOSTACCI, DOMIZIANO;CASTELLANI, GASTONE;SUMINI, MARCO;
2015
Abstract
A comparative study has been performed on the effects of high-dose-rate (DR) X-ray beams produced by a plasma focus device (PFMA-3), to exploit its potential medical applications (e.g. radiotherapy), and low-DR X-ray beams produced by a conventional source (XRT). Experiments have been performed at 0.5 and 2 Gy doses on a human glioblastoma cell line (T98G). Cell proliferation rate and potassium outward currents (IK) have been investigated by time lapse imaging and patch clamp recordings. The results showed that PFMA-3 irradiation has a greater capability to reduce the proliferation rate activity with respect to XRT, while it does not affect IK of T98G cells at any of the dose levels tested. XRT irradiation significantly reduces the mean IK amplitude of T98G cells only at 0.5 Gy. This work confirms that the DR, and therefore the source of radiation, is crucial for the planning and optimisation of radiotherapy applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
