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Yoshii Y, Matsumoto H, Yoshimoto M, Oe Y, Zhang MR, Nagatsu K, Sugyo A, Tsuji AB, Higashi T. 64Cu-Intraperitoneal Radioimmunotherapy: A Novel Approach for Adjuvant Treatment in a Clinically Relevant Preclinical Model of Pancreatic Cancer. J Nucl Med 2019; 60:1437-1443. [PMID: 30850497 PMCID: PMC6785796 DOI: 10.2967/jnumed.118.225045] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 02/20/2019] [Indexed: 01/11/2023] Open
Abstract
Pancreatic cancer (PC) has a very poor prognosis. Surgery is the primary treatment for patients with resectable PC; however, local recurrence, hepatic metastasis, and peritoneal dissemination often occur even after extensive surgery. Adjuvant chemotherapy, typically with gemcitabine, has been used clinically but with only a modest survival benefit. To achieve a better outcome, we investigated the efficacy of 64Cu-intraperitoneal radioimmunotherapy (ipRIT) with 64Cu-labeled antiepidermal growth factor receptor antibody cetuximab as an adjuvant treatment after PC surgery using an orthotopic xenografted mouse model. Methods: The efficacy of adjuvant 64Cu-ipRIT was investigated in a human PC mouse model harboring orthotopic xenografts of xPA-1-DC cells. To reproduce the clinical situation, PC xenografts were surgically resected when pancreatic tumors were readily visible but not metastatic tumors. Increasing doses of 64Cu-cetuximab were intraperitoneally injected, and the mice were monitored for toxicity to determine the safe therapeutic dose. For adjuvant 64Cu-ipRIT, the day after tumor resection, the mice were intraperitoneally administered 22.2 MBq of 64Cu-PCTA-cetuximab and the survival was compared with that in surgery-only controls. For comparison, adjuvant chemotherapy with gemcitabine was also examined using the same model. Results: The mouse model not only developed primary tumors in the pancreas but also subsequently reproduced local recurrence, hepatic metastasis, and peritoneal dissemination after surgery, which is similar to the manifestations that occur with human PC. Adjuvant 64Cu-ipRIT with 64Cu-labeled cetuximab after surgery effectively suppressed local recurrence, hepatic metastasis, and peritoneal dissemination in this model. Significant improvement of the survival with minimal toxicity was achieved by adjuvant 64Cu-ipRIT compared with that in control mice that underwent surgery only. Adjuvant chemotherapy with gemcitabine nominally prolonged the survival, but the effect was not statistically significant. Conclusion:64Cu-ipRIT with cetuximab can be an effective adjuvant therapy after PC surgery.
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Affiliation(s)
- Yukie Yoshii
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | | | - Mitsuyoshi Yoshimoto
- Division of Functional Imaging, National Cancer Center Hospital East, Chiba, Japan
| | - Yoko Oe
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Ming-Rong Zhang
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Kotaro Nagatsu
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Aya Sugyo
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Atsushi B Tsuji
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Tatsuya Higashi
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
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Yoshii Y, Yoshimoto M, Matsumoto H, Tashima H, Iwao Y, Takuwa H, Yoshida E, Wakizaka H, Yamaya T, Zhang MR, Sugyo A, Hanadate S, Tsuji AB, Higashi T. Integrated treatment using intraperitoneal radioimmunotherapy and positron emission tomography-guided surgery with 64Cu-labeled cetuximab to treat early- and late-phase peritoneal dissemination in human gastrointestinal cancer xenografts. Oncotarget 2018; 9:28935-28950. [PMID: 29989003 PMCID: PMC6034757 DOI: 10.18632/oncotarget.25649] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 06/03/2018] [Indexed: 02/03/2023] Open
Abstract
Peritoneal dissemination is a common cause of death from gastrointestinal cancers and is difficult to treat using current therapeutic options, particularly late-phase disease. Here, we investigated the feasibility of integrated therapy using 64Cu-intraperitoneal radioimmunotherapy (ipRIT), alone or in combination with positron emission tomography (PET)-guided surgery using a theranostic agent (64Cu-labeled anti-epidermal growth factor receptor antibody cetuximab) to treat early- and late-phase peritoneal dissemination in mouse models. In this study, we utilized the OpenPET system, which has open space for conducting surgery while monitoring objects at high resolution in real time, as a novel approach to make PET-guided surgery feasible. 64Cu-ipRIT with cetuximab inhibited tumor growth and prolonged survival with little toxicity in mice with early-phase peritoneal dissemination of small lesions. For late-phase peritoneal dissemination, a combination of 64Cu-ipRIT for down-staging and subsequent OpenPET-guided surgery for resecting large tumor masses effectively prolonged survival. OpenPET clearly detected tumors (≥3 mm in size) behind other organs in the peritoneal cavity and was useful for confirming the presence or absence of residual tumors during an operation. These findings suggest that integrated 64Cu therapy can serve as a novel treatment strategy for peritoneal dissemination.
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Affiliation(s)
- Yukie Yoshii
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Mitsuyoshi Yoshimoto
- Division of Functional Imaging, National Cancer Center Hospital East, Chiba, Japan
| | | | - Hideaki Tashima
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Yuma Iwao
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Hiroyuki Takuwa
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Eiji Yoshida
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Hidekatsu Wakizaka
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Taiga Yamaya
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Ming-Rong Zhang
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Aya Sugyo
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Sayaka Hanadate
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Atsushi B Tsuji
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Tatsuya Higashi
- National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
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Gremonprez F, Willaert W, Ceelen W. Animal models of colorectal peritoneal metastasis. Pleura Peritoneum 2016; 1:23-43. [PMID: 30911606 DOI: 10.1515/pp-2016-0006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 03/04/2016] [Indexed: 12/13/2022] Open
Abstract
Colorectal cancer remains an important cause of mortality worldwide. The presence of peritoneal carcinomatosis (PC) causes significant symptoms and is notoriously difficult to treat. Therefore, informative preclinical research into the mechanisms and possible novel treatment options of colorectal PC is essential in order to improve the prognostic outlook in these patients. Several syngeneic and xenograft animal models of colorectal PC were established, studying a wide range of experimental procedures and substances. Regrettably, more sophisticated models such as those giving rise to spontaneous PC or involving genetically engineered mice are lacking. Here, we provide an overview of all reported colorectal PC animal models and briefly discuss their use, strengths, and limitations.
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Affiliation(s)
- Félix Gremonprez
- Department of Gastrointestinal Surgery, Ghent University Hospital, Ghent, Belgium
| | - Wouter Willaert
- Department of Gastrointestinal Surgery, Ghent University Hospital, Ghent, Belgium
| | - Wim Ceelen
- Department of Gastrointestinal Surgery, Ghent University Hospital, 2K12 IC UZ Gent De Pintelaan 185, 9000 Ghent, Belgium
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Abstract
Peritoneal carcinomatosis is the most common secondary cancerous disease to affect the peritoneal cavity, implying poor prognosis. Standard therapy consists of cytoreductive surgery in combination with adjuvant chemotherapy. To improve the therapeutic outcome, targeted therapy using radionuclides such as α-, β- and Auger emitters coupled to antibodies seems a promising option. Although β-emitters have shown promising results in preclinical and clinical Phase I/II studies, these results could not be confirmed in Phase III studies. Because α-particles very efficiently eradicate small tumor cell nodules, they represent a promising option for treatment of micrometastatic disease characteristic of peritoneal carcinomatosis. α-emitter radioimmunoconjugates have been successfully used in various experimental studies and in a first clinical Phase I study in human ovarian cancer. Although confirmation of these results in clinical trials is missing and problems still exist concerning worldwide availability, α-emitters could contribute to optimizing strategies for therapy of peritoneal carcinomatosis.
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Affiliation(s)
- Christof Seidl
- Technische Universität München, Department of Nuclear Medicine, Ismaninger Strasse 22, 81675 Munich, Germany.
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Enhanced efficacy of combined 213Bi-DTPA-F3 and paclitaxel therapy of peritoneal carcinomatosis is mediated by enhanced induction of apoptosis and G2/M phase arrest. Eur J Nucl Med Mol Imaging 2012; 39:1886-97. [PMID: 22872310 DOI: 10.1007/s00259-012-2203-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 07/16/2012] [Indexed: 10/28/2022]
Abstract
PURPOSE Targeted therapy with α-particle emitting radionuclides is a promising new option in cancer therapy. Stable conjugates of the vascular tumour-homing peptide F3 with the α-emitter (213)Bi specifically target tumour cells. The aim of our study was to determine efficacy of combined (213)Bi-diethylenetriaminepentaacetic acid (DTPA)-F3 and paclitaxel treatment compared to treatment with either (213)Bi-DTPA-F3 or paclitaxel both in vitro and in vivo. METHODS Cytotoxicity of treatment with (213)Bi-DTPA-F3 and paclitaxel, alone or in combination, was assayed towards OVCAR-3 cells using the alamarBlue assay, the clonogenic assay and flow cytometric analyses of the mode of cell death and cell cycle arrest. Therapeutic efficacy of the different treatment options was assayed after repeated treatment of mice bearing intraperitoneal OVCAR-3 xenograft tumours. Therapy monitoring was performed by bioluminescence imaging and histopathologic analysis. RESULTS Treatment of OVCAR-3 cells in vitro with combined (213)Bi-DTPA-F3 and paclitaxel resulted in enhanced cytotoxicity, induction of apoptosis and G2/M phase arrest compared to treatment with either (213)Bi-DTPA-F3 or paclitaxel. Accordingly, i.p. xenograft OVCAR-3 tumours showed the best response following repeated (six times) combined therapy with (213)Bi-DTPA-F3 (1.85 MBq) and paclitaxel (120 μg) as demonstrated by bioluminescence imaging and histopathologic investigation of tumour spread on the mesentery of the small and large intestine. Moreover, mean survival of xenograft mice that received combined therapy with (213)Bi-DTPA-F3 and paclitaxel was significantly superior to mice treated with either (213)Bi-DTPA-F3 or paclitaxel alone. CONCLUSION Combined treatment with (213)Bi-DTPA-F3 and paclitaxel significantly increased mean survival of mice with peritoneal carcinomatosis of ovarian origin, thus favouring future therapeutic application.
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Boudousq V, Ricaud S, Garambois V, Bascoul-Mollevi C, Boutaleb S, Busson M, Quenet F, Colombo PE, Bardiès M, Kotzki PO, Navarro-Teulon I, Pèlegrin A, Pouget JP. Brief intraperitoneal radioimmunotherapy of small peritoneal carcinomatosis using high activities of noninternalizing 125I-labeled monoclonal antibodies. J Nucl Med 2010; 51:1748-55. [PMID: 20956481 DOI: 10.2967/jnumed.110.080226] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
UNLABELLED We assessed the efficiency and toxicity of brief intraperitoneal radioimmunotherapy using high activities of (125)I-labeled monoclonal antibody (mAb) in the treatment of small-volume peritoneal carcinomatosis. METHODS Brief intraperitoneal radioimmunotherapy consisted of a 185-MBq (740 MBq/mg) intraperitoneal injection of (125)I-35A7 (an anti-carcinoembryonic antigen mAb) into athymic nude mice 4 d after peritoneal tumor xenografting and, after 1 h, abundant washing of the peritoneal cavity with saline solution to remove unbound radioactivity. Another group of mice received this treatment plus a 37-MBq intravenous injection of (125)I-35A7 on day 7 or 11 after grafting. Control groups received a brief treatment followed by an additional intravenous injection on day 7 of either saline solution or irrelevant (125)I-PX. Tumor growth was monitored by bioluminescence imaging and SPECT/CT, and hematologic toxicity was evaluated by complete blood counts. Survival time was reported, and the mice were sacrificed when the bioluminescence signal reached 4.5 × 10(7) photons/s. The biodistribution of (125)I-35A7 mAb after intravenous or brief treatment was assessed, and the mean absorbed irradiation dose by organs and tumors was calculated using the MIRD formalism. RESULTS Mild, transient hematologic toxicity was observed after the brief treatment plus intravenous (125)I-mAb, with no weight loss. Median survival increased from 32 d in the control groups, to 46 d in the brief treatment group, to 66 d in the group additionally receiving intravenous treatment on day 11, to 73 d in the group additionally receiving intravenous treatment on day 7. The brief treatment alone resulted in a 3-fold higher tumor-to-blood uptake ratio than did the standard intravenous treatment, and the mean absorbed irradiation doses by tumors were 11.6 Gy for the brief treatment and 16.7 Gy for the additional intravenous treatment. For healthy tissues other than blood, the mean absorbed irradiation dose did not exceed 1 Gy after brief treatment and 4.2 Gy after intravenous treatment. CONCLUSION The efficiency, low toxicity, and high tumor-to-healthy tissue uptake ratio associated with brief intraperitoneal (125)I-35A7 radioimmunotherapy suggest that this method can be used in combination with radiation-synergistic drugs in the therapy of small-volume peritoneal carcinomatosis after cytoreductive surgery.
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Affiliation(s)
- Vincent Boudousq
- IRCM, Institut de Recherche en Cancérologie de Montpellier, Montpellier, France
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Yagi Y, Fushida S, Harada S, Tsukada T, Kinoshita J, Oyama K, Fujita H, Ninomiya I, Fujimura T, Kayahara M, Kinuya S, Yashiro M, Hirakawa K, Ohta T. Biodistribution of humanized anti-VEGF monoclonal antibody/bevacizumab on peritoneal metastatic models with subcutaneous xenograft of gastric cancer in mice. Cancer Chemother Pharmacol 2009; 66:745-53. [PMID: 20033809 DOI: 10.1007/s00280-009-1219-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2009] [Accepted: 12/09/2009] [Indexed: 01/12/2023]
Abstract
PURPOSE Vascular endothelial growth factor (VEGF) is correlated with peritoneal metastasis of gastric cancer, increasing vascular permeability accompanied by accumulation of ascites. The aim of the current study is to investigate the biodistribution of bevacizumab in a peritoneal metastatic model of gastric cancer and to clarify which is more suited to treatment of peritoneal metastasis, systemic or regional therapy. METHODS A highly peritoneal-seeding cell line of gastric cancer, OCUM-2MD3, which exhibited high production and release of VEGF was used in this study. The biodistribution of bevacizumab was investigated using peritoneal metastatic models together with subcutaneous xenografts, and (125)I-radiolabelled bevacizumab was administrated to these models subcutaneously (s.c.) or intraperitoneally (i.p.), respectively. In addition, the anti-tumor response of bevacizumab and paclitaxel was assessed as single agents or in combination using peritoneal metastatic models. RESULTS In the analysis of biodistribution, (125)I-bevacizumab administrated i.p. indicated low peritoneal clearance. On the other hand, s.c. administration of (125)I-bevacizumab showed preferential accumulation in subcutaneous tumors and peritoneal nodules, with a high blood concentration. In peritoneal metastatic models, the effects of bevacizumab were found for both the growth inhibition of peritoneal nodules (P < 0.01) and the reduction of ascites (P < 0.05). These effects were more prominent by s.c. administration compared with i.p. administration and were increased in combination with i.p. paclitaxel. CONCLUSION Bevacizumab should be administrated systemically compared to regionally, and the combination with i.p. paclitaxel has a potential to be useful for patients with peritoneal metastasis of gastric cancer.
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Affiliation(s)
- Yasumichi Yagi
- Department of Gastroenterologic Surgery, Division of Cancer Medicine, Graduate School of Medical Science, Kanazawa University, 13-1 Takara-machi, Kanazawa, Ishikawa, Japan.
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Yin XL, Yan X, Wen M, Peng ZP, Li SL. Synergistic antitumor effects of 131I-LC-1 IgM and IL-12 vaccine on Lewis lung carcinoma. Int Immunopharmacol 2009; 10:284-9. [PMID: 19951748 DOI: 10.1016/j.intimp.2009.11.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 11/14/2009] [Accepted: 11/24/2009] [Indexed: 11/16/2022]
Abstract
This study was designed to determine the antitumor effects of iodine-131 labeled monoclonal antibody LC-1 ((131)I-LC-1), interleukin-12 (IL-12) vaccine, or the combination of both on C57BL/6 mice bearing Lewis lung carcinoma (LLC) tumors. Tumor-bearing mice models were randomly divided into 4 groups that were respectively injected intratumorally with phosphate buffered solution (PBS), IL-12 vaccine gene therapy (GT), (131)I-LC-1 radioimmuno-therapy (RIT), or GT+RIT. Tumor volumes were measured before and after treatment. ELISA and RT-PCR determined the expression of IL-l2. LC-1 monoclonal antibody (Mab) was labeled with Na(131)I. Cytolytic T lymphocyte (CTL) activity assay, Natural Killer cell (NK) activity assay and apoptosis analysis were performed. Intratumoral (131)I-LC-1 injection leads to higher delivery of the antibody to the tumor. Tumor apoptosis occurred in the GT, RIT and GT+RIT groups. Tumor growth was inhibited in the GT, RIT and GT+RIT groups. Compared with other groups, the combination of GT+RIT up-regulated the expression of IL-l2 gene and inhibited the tumor growth more effectively than either GT or RIT alone (p<0.05). These results suggest that GT+RIT have the synergistic antitumor effects on tumor-bearing mice.
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Affiliation(s)
- Xiao Ling Yin
- Department of Radiological Medicine, Chongqing Medical University, Chongqing, PR China
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Drecoll E, Gaertner FC, Miederer M, Blechert B, Vallon M, Müller JM, Alke A, Seidl C, Bruchertseifer F, Morgenstern A, Senekowitsch-Schmidtke R, Essler M. Treatment of peritoneal carcinomatosis by targeted delivery of the radio-labeled tumor homing peptide bi-DTPA-[F3]2 into the nucleus of tumor cells. PLoS One 2009; 4:e5715. [PMID: 19479088 PMCID: PMC2682652 DOI: 10.1371/journal.pone.0005715] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2009] [Accepted: 04/24/2009] [Indexed: 12/02/2022] Open
Abstract
Background α-particle emitting isotopes are effective novel tools in cancer therapy, but targeted delivery into tumors is a prerequisite of their application to avoid toxic side effects. Peritoneal carcinomatosis is a widespread dissemination of tumors throughout the peritoneal cavity. As peritoneal carcinomatosis is fatal in most cases, novel therapies are needed. F3 is a tumor homing peptide which is internalized into the nucleus of tumor cells upon binding to nucleolin on the cell surface. Therefore, F3 may be an appropriate carrier for α-particle emitting isotopes facilitating selective tumor therapies. Principal Findings A dimer of the vascular tumor homing peptide F3 was chemically coupled to the α-emitter 213Bi (213Bi-DTPA-[F3]2). We found 213Bi-DTPA-[F3]2 to accumulate in the nucleus of tumor cells in vitro and in intraperitoneally growing tumors in vivo. To study the anti-tumor activity of 213Bi-DTPA-[F3]2 we treated mice bearing intraperitoneally growing xenograft tumors with 213Bi-DTPA-[F3]2. In a tumor prevention study between the days 4–14 after inoculation of tumor cells 6×1.85 MBq (50 µCi) of 213Bi-DTPA-[F3]2 were injected. In a tumor reduction study between the days 16–26 after inoculation of tumor cells 6×1.85 MBq of 213Bi-DTPA-[F3]2 were injected. The survival time of the animals was increased from 51 to 93.5 days in the prevention study and from 57 days to 78 days in the tumor reduction study. No toxicity of the treatment was observed. In bio-distribution studies we found 213Bi-DTPA-[F3]2 to accumulate in tumors but only low activities were found in control organs except for the kidneys, where 213Bi-DTPA-[F3]2 is found due to renal excretion. Conclusions/Significance In conclusion we report that 213Bi-DTPA-[F3]2 is a novel tool for the targeted delivery of α-emitters into the nucleus of tumor cells that effectively controls peritoneal carcinomatosis in preclinical models and may also be useful in oncology.
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Affiliation(s)
- Enken Drecoll
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
| | | | - Matthias Miederer
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
| | - Birgit Blechert
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
| | - Mario Vallon
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
| | - Jan M. Müller
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
| | - Andrea Alke
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
| | - Christof Seidl
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
| | - Frank Bruchertseifer
- European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe, Germany
| | - Alfred Morgenstern
- European Commission, Joint Research Centre, Institute for Transuranium Elements, Karlsruhe, Germany
| | | | - Markus Essler
- Department of Nuclear Medicine, Klinikum-rechts-der-Isar, München, Germany
- * E-mail:
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Milenic DE, Garmestani K, Brady ED, Baidoo KE, Albert PS, Wong KJ, Flynn J, Brechbiel MW. Multimodality therapy: potentiation of high linear energy transfer radiation with paclitaxel for the treatment of disseminated peritoneal disease. Clin Cancer Res 2008; 14:5108-15. [PMID: 18698028 DOI: 10.1158/1078-0432.ccr-08-0256] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Studies herein explore paclitaxel enhancement of the therapeutic efficacy of alpha-particle-targeted radiation therapy. EXPERIMENTAL DESIGN Athymic mice bearing 3 day i.p. LS-174T xenografts were treated with 300 or 600 microg paclitaxel at 24 h before, concurrently, or 24 h after [213Bi] or [212Pb]trastuzumab. RESULTS Paclitaxel (300 or 600 microg) followed 24 h later with [213Bi]trastuzumab (500 microCi) provided no therapeutic enhancement. Paclitaxel (300 microg) administered concurrently with [213Bi]trastuzumab or [213Bi]HuIgG resulted in median survival of 93 and 37 days, respectively; no difference was observed with 600 microg paclitaxel. Mice receiving just [213Bi]trastuzumab or [213Bi]HuIgG or left untreated had a median survival of 31, 21, and 15 days, respectively, 23 days for just either paclitaxel dose alone. Paclitaxel (300 or 600 microg) given 24 h after [213Bi]trastuzumab increased median survival to 100 and 135 days, respectively. The greatest improvement in median survival (198 days) was obtained with two weekly doses of paclitaxel (600 microg) followed by [213Bi]trastuzumab. Studies were also conducted investigating paclitaxel administered 24 h before, concurrently, or 24 h after [212Pb]trastuzumab (10 microCi). The 300 microg paclitaxel 24 h before radioimmunotherapy (RIT) failed to provide benefit, whereas 600 microg extended the median survival from 44 to 171 days. CONCLUSIONS These results suggest that regimens combining chemotherapeutics and high linear energy transfer (LET) RIT may have tremendous potential in the management and treatment of cancer patients. Dose dependency and administration order appear to be critical factors requiring careful investigation.
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Affiliation(s)
- Diane E Milenic
- Radioimmune and Inorganic Chemistry Section, Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA.
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Fidarova EF, El-Emir E, Boxer GM, Qureshi U, Dearling JLJ, Robson MP, Begent RHJ, Trott KR, Pedley RB. Microdistribution of targeted, fluorescently labeled anti-carcinoembryonic antigen antibody in metastatic colorectal cancer: implications for radioimmunotherapy. Clin Cancer Res 2008; 14:2639-46. [PMID: 18451227 DOI: 10.1158/1078-0432.ccr-07-2031] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Most radioimmunotherapy studies on radiolabeled antibody distribution are based on autoradiographic and radioluminographic data, which provide a lack of detailed information due to low resolution. We used fluorescently labeled anti-carcinoembryonic antigen (CEA) antibody (A5B7) to investigate quantitatively the kinetics and microdistribution of antibody in a clinically relevant orthotopic colorectal cancer model (LS174T) using high-resolution digital microscopy. EXPERIMENTAL DESIGN Nude mice bearing LS174T liver orthotopic tumors received a single i.v. injection of fluorescently labeled A5B7 and were sacrificed at 10 minutes, 1 hour, or 24 hours postinjection. Before sacrifice, mice were injected with the perfusion marker Hoechst 33342. An anti-CD31 antibody was used to detect blood vessel distribution. Cryostat sections were processed with immunofluorescence procedures and analyzed with fluorescence microscopy and image analysis techniques. The fluorescence images were related to morphologic images of the same or adjacent tumor sections. RESULTS Fluorescently labeled antibody showed rapid, selective uptake into tumor deposits, with a strong negative correlation with tumor size at 10 minutes and 1 hour (P < or = 0.01). By 24 hours, the correlation was no longer significant. The study showed movement of antibody across the tumor with time and a tendency to localize more uniformly by later time points (24 hours). The rate of antibody motility was similar in small and large tumor metastases, but small deposits showed more rapid antibody localization. Intratumoral vessels were positively related to tumor size (P < or = 0.001). CONCLUSION The obtained data suggest that radioimmunotherapy can be highly efficient in an adjuvant or minimal residual disease setting.
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Affiliation(s)
- Elena F Fidarova
- Cancer Research UK Targeting and Imaging Group, Department of Oncology, University College London, London, United Kingdom
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Gunn AJ, Brechbiel MW, Choyke PL. The emerging role of molecular imaging and targeted therapeutics in peritoneal carcinomatosis. Expert Opin Drug Deliv 2007; 4:389-402. [PMID: 17683252 DOI: 10.1517/17425247.4.4.389] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Peritoneal carcinomatosis is a common and often fatal late-stage complication of many gastrointestinal and gynecologic malignancies. This review discusses the ongoing evolution of diagnostic and treatment strategies for peritoneal carcinomatosis and the role that molecular imaging and radioimmunotherapy may play in improving patient survival. An overview of recent developments in targeted imaging and therapeutics for peritoneal carcinomatosis, as well as the authors' opinions as to future developments in this field is also provided.
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Affiliation(s)
- Andrew J Gunn
- Howard Hughes Medical Institute, 4000 Jones Bridge Road, Chevy Chase, MD 20815-6789, USA
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