Study of Tumour and Surrounding Tissue Heating with Near-Infrared Radiation after the Injection of Gold Nanoparticles into the Tissue

We study the heating kinetics in transplanted model tumours after the intravenous injection of suspension of gold nanorods having the concentration from 400 to 1200 µg/mL under the laser irradiation at the wavelength 808 nm during 15 min. The object of study were 40 outbred white laboratory rats with transplanted liver cancer tumours (Cholangiocarcinoma PC1). The obtained results allow the optimisation of the gold nanorods injection technique at different degrees of vascularisation of tumour tissues aimed to provide the maximal heating of tumours by the laser radiation. It is shown that the maximal increase of the tumour temperature is related to the maximal accumulation of gold nanorods in the tumour tissues, observed in the case of its high vascularisation.