MR-guided pulsed high intensity focused ultrasound enhancement of docetaxel combined with radiotherapy for prostate cancer treatment.
The purpose of this study is to evaluate the efficacy of the enhancement of docetaxel by pulsed focused ultrasound (pFUS) in combination with radiotherapy (RT) for treatment of prostate cancer in vivo. LNCaP cells were grown in the prostates of male nude mice. When the tumors reached a designated volume by MRI, tumor bearing mice were randomly divided into seven groups (n = 5): (1) pFUS alone; (2) RT alone; (3) docetaxel alone; (4) docetaxel + pFUS; (5) docetaxel + RT; (6) docetaxel + pFUS + RT, and (7) control. MR-guided pFUS treatment was performed using a focused ultrasound treatment system (InSightec ExAblate 2000) with a 1.5T GE MR scanner. Animals were treated once with pFUS, docetaxel, RT or their combinations. Docetaxel was given by i.v. injection at 5 mg kg(-1) before pFUS. RT was given 2 Gy after pFUS. Animals were euthanized 4 weeks after treatment. Tumor volumes were measured on MRI at 1 and 4 weeks post-treatment. Results showed that triple combination therapies of docetaxel, pFUS and RT provided the most significant tumor growth inhibition among all groups, which may have potential for the treatment of prostate cancer due to an improved therapeutic ratio.
Department of Radiation Oncology, Fox Chase Cancer Center, Philadelphia, PA, USA.
Zhaomei
Z
Mu
C-M
CM
Ma
Xiaoming
X
Chen
Dusica
D
Cvetkovic
Alan
A
Pollack
Lili
L
Chen
D000818:Animals; D001692:Biological Transport; D045744:Cell Line, Tumor; D003131:Combined Modality Therapy; D000077143:Docetaxel; D057086:High-Intensity Focused Ultrasound Ablation; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D051379:Mice; D011471:Prostatic Neoplasms / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology / Q000532:radiotherapy*; D025321:Surgery, Computer-Assisted; D043823:Taxoids / Q000378:metabolism / Q000494:pharmacology* / Q000627:therapeutic use; D016896:Treatment Outcome; D047368:Tumor Burden / Q000187:drug effects / Q000528:radiation effects; D023041:Xenograft Model Antitumor Assays
D043823:Taxoids; D000077143:Docetaxel