Visualisation of tumour regression after local chemotherapy with magnetic nanoparticles - a pilot study.

Abstract:

UNLABELLED:Magnetic drug targeting (MDT) is a new locoregional chemotherapy method that increases the drug dose in the tumour region, while simultaneously reducing the overall dose through the application of chemotherapeutic-bound superparamagnetic nanoparticles, which are focused by an external magnetic field to the desired body compartment. An important factor in this kind of therapy is the vascularisation of the targeted tumour. In this pilot study, the visualisation of the tumour-vascularisation before and after MDT was investigated. MATERIALS AND METHODS:In a rabbit VX-2 tumour model, mitoxantrone bound to Fe(3)O(4)-nanoparticles was applied through the femoral artery close to the tumour. The visualisation of vascularisation and tumour size before and after MDT was performed using a biplane angiographic system (Siemens Axiom Artis dBA) to obtain conventional angiographic series with a standard iodine contrast agent. In addition, cross-sectional images were obtained with the new technique of flat panel detector computed tomography (FD-CT) called DYNA-CT. RESULTS:The tumours and the supplying vessels were clearly displayed by FD-CT before and after MDT. The tumours of the study group showed considerable size reductions and the angiography showed a drastic reduction of the tumour supporting vessels following MDT. CONCLUSION:MDT leads to significant tumour size reductions within several weeks after a single administration of chemotherapy. In this pilot study, FD-CT offered an excellent possibility to monitor the vascularisation and the size of the tumours before and after MDT.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Lyer S,Tietze R,Jurgons R,Struffert T,Engelhorn T,Schreiber E,Dörfler A,Alexiou C

subject

Has Abstract

pub_date

2010-05-01 00:00:00

pages

1553-7

issue

5

eissn

0250-7005

issn

1791-7530

pii

30/5/1553

journal_volume

30

pub_type

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