Objective: We sought to examine high-intensity focused ultrasound (HIFU)-induced hyperthermia, in the liver of a rat model to focally induce green-fluorescent protein (GFP). Materials and Methods: A total of 25 Copenhagen rats were included in this study. Rats were divided into groups treated with an adenovirus coding for green fluorescent protein (GFP) under the control of a hsp70B promoter and a CMV promoter. Ad-CMV-GFP-treated rats served as positive control. Untreated controls only subjected to MRI +/- HIFU-treatment served to find out optimal power of HIFU in the target area of the liver. Temperature was noninvasively monitored by temperature sensitive magnetic resonance imaging (MRI). Results: Rats treated with Ad-bsp70B-GFP demonstrated localized gene induction within the liver parenchyma, in good correlation with MRI and histology. Applying an acoustic power of 1.92 W a relatively uniform focal temperature up to 42 +/- 5 degrees C within the liver parenchyma could be documented. 3 x 10(9) plaque-forming units proved to account for a very homogeneous liver infection. Number of fluorescent cells in the region of hyperthermia was similar to the control group treated with Ad-CMV-GFP. Conclusion: Using the introduced parameters spatially controlled gene induction within a parenchymal organ such as the liver in rats using HIFU under control of MR1 is feasible.
|Data di pubblicazione:||2005|
|Titolo:||Focal gene induction in the liver of rats by a heat-inducible promoter using focused ultrasound hyperthermia - Preliminary results|
|Autore/i:||Plathow, C; Lohr, F; Divkovic, G; Rademaker, G; Farhan, N; Peschke, P; Zuna, I; Debus, J; Claussen, Cd; Kauczor, Hu; Li, Cy; Jenne, J; Huber, P|
|Digital Object Identifier (DOI):||10.1097/01.rli.0000184763.62578.06|
|Codice identificativo ISI:||WOS:000232753400007|
|Codice identificativo Scopus:||2-s2.0-27544500119|
|Citazione:||Focal gene induction in the liver of rats by a heat-inducible promoter using focused ultrasound hyperthermia - Preliminary results / Plathow, C; Lohr, F; Divkovic, G; Rademaker, G; Farhan, N; Peschke, P; Zuna, I; Debus, J; Claussen, Cd; Kauczor, Hu; Li, Cy; Jenne, J; Huber, P. - In: INVESTIGATIVE RADIOLOGY. - ISSN 0020-9996. - 40:11(2005), pp. 729-735.|
|Tipologia||Articolo su rivista|
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