Institute of Fundamental Technological Research
Polish Academy of Sciences

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Damian Strzemecki


Recent publications
1.  Kaplińska-Kłosiewicz P.M., Fura Ł., Kujawska T., Andrzejewski K., Kaczyńska K., Strzemecki D., Sulejczak M., Chrapusta S., Macias M., Sulejczak D., Study of Biological Effects Induced in Solid Tumors by Shortened-Duration Thermal Ablation Using High-Intensity Focused Ultrasound, Cancers, ISSN: 2072-6694, DOI: 10.3390/cancers16162846, Vol.16, No.2846, pp.1-23, 2024

Abstract:
The HIFU ablation technique is limited by the long duration of the procedure, which results from the large difference between the size of the HIFU beam’s focus and the tumor size. Ablation of large tumors requires treating them with a sequence of single HIFU beams, with a specific time interval in-between. The aim of this study was to evaluate the biological effects induced in a malignant solid tumor of the rat mammary gland, implanted in adult Wistar rats, during HIFU treatment according to a new ablation plan which allowed researchers to significantly shorten the duration of the procedure. We used a custom, automated, ultrasound imaging-guided HIFU ablation device. Tumors with a 1 mm thickness margin of healthy tissue were subjected to HIFU. Three days later, the animals were sacrificed, and the HIFU-treated tissues were harvested. The biological effects were studied, employing morphological, histological, immunohistochemical, and ultrastructural techniques. Massive cell death, hemorrhages, tissue loss, influx of immune cells, and induction of pro-inflammatory cytokines were observed in the HIFU-treated tumors. No damage to healthy tissues was observed in the area surrounding the safety margin. These results confirmed the efficacy of the proposed shortened duration of the HIFU ablation procedure and its potential for the treatment of solid tumors.

Keywords:
HIFU thermal ablation, breast cancer model, treatment plan, morphology, histology, ultrastructure, immune response, cell death, apoptosis, necrosis

Affiliations:
Kaplińska-Kłosiewicz P.M. - other affiliation
Fura Ł. - IPPT PAN
Kujawska T. - IPPT PAN
Andrzejewski K. - other affiliation
Kaczyńska K. - other affiliation
Strzemecki D. - other affiliation
Sulejczak M. - other affiliation
Chrapusta S. - other affiliation
Macias M. - other affiliation
Sulejczak D. - other affiliation

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