Treatment of solid tumors by interstitial release of recoiling short-lived alpha emitters

被引:80
作者
Arazi, L. [1 ]
Cooks, T.
Schmidt, M.
Keisari, Y.
Kelson, I.
机构
[1] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
[2] Tel Aviv Univ, Sackler Fac Med, Dept Human Microbiol, IL-69978 Tel Aviv, Israel
关键词
D O I
10.1088/0031-9155/52/16/021
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
A new method utilizing alpha particles to treat solid tumors is presented. Tumors are treated with interstitial radioactive sources which continually release short-lived alpha emitting atoms from their surface. The atoms disperse inside the tumor, delivering a high dose through their alpha decays. We implement this scheme using thin wire sources impregnated with Ra-224, which release by recoil Rn-220, Po-216 and Pb-212 atoms. This work aims to demonstrate the feasibility of our method by measuring the activity patterns of the released radionuclides in experimental tumors. Sources carrying Ra-224 activities in the range 10-130 kBq were used in experiments on murine squamous cell carcinoma tumors. These included gamma spectroscopy of the dissected tumors and major organs, Fuji-plate autoradiography of histological tumor sections and tissue damage detection by Hematoxylin-Eosin staining. The measurements focused on Pb-212 and Bi-212. The Rn-220/Po-216 distribution was treated theoretically using a simple diffusion model. A simplified scheme was used to convert measured Pb-212 activities to absorbed dose estimates. Both physical and histological measurements confirmed the formation of a 5-7 mm diameter necrotic region receiving a therapeutic alpha-particle dose around the source. The necrotic regions shape closely corresponded to the measured activity patterns. Pb-212 was found to leave the tumor through the blood at a rate which decreased with tumor mass. Our results suggest that the proposed method, termed DART (diffusing alpha-emitters radiation therapy), may potentially be useful for the treatment of human patients.
引用
收藏
页码:5025 / 5042
页数:18
相关论文
共 32 条
[1]  
ALLEN B, 2006, PHYS MED BIOL, V51
[2]   Intralesional targeted alpha therapy for metastatic melanoma [J].
Allen, BJ ;
Raja, C ;
Rizvi, S ;
Li, Y ;
Tsui, W ;
Graham, P ;
Thompson, JF ;
Reisfeld, RA ;
Kearsley, J ;
Morgenstern, A ;
Apostolidis, C .
CANCER BIOLOGY & THERAPY, 2005, 4 (12) :1318-1324
[3]   Preclinical targeted alpha therapy for subcutaneous melanoma [J].
Allen, BJ ;
Rizvi, SMA ;
Tian, Z .
MELANOMA RESEARCH, 2001, 11 (02) :175-182
[4]   IMAGING PLATE ILLUMINATES MANY FIELDS [J].
AMEMIYA, Y ;
MIYAHARA, J .
NATURE, 1988, 336 (6194) :89-90
[5]   Antimetastatic activity of the photodynamic agent hypericin in the dark [J].
Blank, M ;
Lavie, G ;
Mandel, M ;
Hazan, S ;
Orenstein, A ;
Meruelo, D ;
Keisari, Y .
INTERNATIONAL JOURNAL OF CANCER, 2004, 111 (04) :596-603
[6]   THE POINT-SPREAD FUNCTION OF X-RAY IMAGE-INTENSIFIERS CCD-CAMERA AND IMAGING-PLATE SYSTEMS IN CRYSTALLOGRAPHY - ASSESSMENT AND CONSEQUENCES FOR THE DYNAMIC-RANGE [J].
BOURGEOIS, D ;
MOY, JP ;
SVENSSON, SO ;
KVICK, A .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1994, 27 :868-877
[7]  
Christiansen J, 2004, MOL CANCER THER, V3, P1493
[8]  
COOKS T, 2007, UNPUB INT J CANC
[9]   Cancer radioimmunotherapy with alpha-emitting nuclides [J].
Couturier, O ;
Supiot, S ;
Degraef-Mougin, M ;
Faivre-Chauvet, A ;
Carlier, T ;
Chatal, JF ;
Davodeau, F ;
Cherel, M .
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING, 2005, 32 (05) :601-614
[10]   The biological chemistry of lead [J].
Godwin, HA .
CURRENT OPINION IN CHEMICAL BIOLOGY, 2001, 5 (02) :223-227