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Tremblay S, Beaudoin JF, Bélissant Benesty O, Ait-Mohand S, Dumulon-Perreault V, Rousseau É, Turcotte ÉE, Guérin B. 68Ga-DOTATATE Prepared from Cyclotron-Produced 68Ga: An Integrated Solution from Cyclotron Vault to Safety Assessment and Diagnostic Efficacy in Neuroendocrine Cancer Patients. J Nucl Med 2023; 64:232-238. [PMID: 35906092 PMCID: PMC9902856 DOI: 10.2967/jnumed.121.263768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 07/18/2022] [Accepted: 07/18/2022] [Indexed: 02/04/2023] Open
Abstract
Cyclotron production of 68Ga is a promising approach to supply 68Ga radiopharmaceuticals. To validate this capability, an integrated solution for a robust synthesis of 68Ga-DOTATATE prepared from cyclotron-produced 68Ga was achieved. A retrospective comparison analysis was performed on patients who underwent PET/CT imaging after injection of DOTATATE labeled with 68Ga produced by a cyclotron or eluted from a generator to demonstrate the clinical safety and diagnostic efficacy of the radiopharmaceutical as a routine standard-of-care diagnostic tool in the clinic. Methods: An enriched pressed 68Zn target was irradiated by a cyclotron with a proton beam set at 12.7 MeV for 100 min. The fully automated process uses an in-vault dissolution system in which a liquid distribution system transfers the dissolved target to a dedicated hot cell for the purification of 68GaCl3 and radiolabeling of DOTATATE using a cassette-based automated module. Quality control tests were performed on the resulting tracer solution. The internal radiation dose for 68Ga-DOTATATE was based on extrapolation from rat biodistribution experiments. A retrospective comparison analysis was performed on patients who underwent PET/CT imaging after injection of DOTATATE labeled with cyclotron- or generator-produced 68Ga. Results: The synthesis of 68Ga-DOTATATE (20.7 ± 1.3 GBq) with high apparent molar activity (518 ± 32 GBq/μmol at the end of synthesis) was completed in 65 min, and the radiopharmaceutical met the requirements specified in the European Pharmacopoeia monograph on 68Ga-chloride (accelerator-produced) solution for radiolabeling. 68Ga-DOTATATE was stable for at least 5 h after formulation. The dosimetry calculated with OLINDA for cyclotron- and generator-produced 68Ga-DOTATATE was roughly equivalent. The SUVmean or SUVmax of tumoral lesions with cyclotron-produced 68Ga-DOTATATE was equivalent to that with generator-produced 68Ga. Among physiologic uptake levels, a significant difference was found in kidneys, spleen, and stomach wall, with lower values in cyclotron-produced 68Ga-DOTATATE in all cases. Conclusion: Integrated cyclotron production achieves reliable high yields of clinical-grade 68Ga-DOTATATE. The clinical safety and imaging efficacy of cyclotron-produced 68Ga-DOTATATE in humans provide supporting evidence for its use in routine clinical practice.
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Affiliation(s)
- Sébastien Tremblay
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and
| | | | - Ophélie Bélissant Benesty
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and,Sherbrooke Molecular Imaging Center of the CRCHUS, Sherbrooke, Quebec, Canada
| | - Samia Ait-Mohand
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and
| | | | - Étienne Rousseau
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and,Sherbrooke Molecular Imaging Center of the CRCHUS, Sherbrooke, Quebec, Canada
| | - Éric E. Turcotte
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and,Sherbrooke Molecular Imaging Center of the CRCHUS, Sherbrooke, Quebec, Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and .,Sherbrooke Molecular Imaging Center of the CRCHUS, Sherbrooke, Quebec, Canada
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Milot MC, Bélissant-Benesty O, Dumulon-Perreault V, Ait-Mohand S, Geha S, Richard PO, Rousseau É, Guérin B. Theranostic 64Cu-DOTHA 2-PSMA allows low toxicity radioligand therapy in mice prostate cancer model. Front Oncol 2023; 13:1073491. [PMID: 36741017 PMCID: PMC9889868 DOI: 10.3389/fonc.2023.1073491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/05/2023] [Indexed: 01/20/2023] Open
Abstract
Introduction We have previously shown that copper-64 (64Cu)-DOTHA2-PSMA can be used for positron emission tomography (PET) imaging of prostate cancer. Owing to the long-lasting, high tumoral uptake of 64Cu-DOTHA2-PSMA, the objective of the current study was to evaluate the therapeutic potential of 64Cu-DOTHA2-PSMA in vivo. Methods LNCaP tumor-bearing NOD-Rag1nullIL2rgnull (NRG) mice were treated with an intraveinous single-dose of 64Cu-DOTHA2-PSMA at maximal tolerated injected activity, natCu-DOTHA2-PSMA at equimolar amount (control) or lutetium-177 (177Lu)-PSMA-617 at 120 MBq to assess their impact on survival. Weight, well-being and tumor size were followed until mice reached 62 days post-injection or ethical limits. Toxicity was assessed through weight, red blood cells (RBCs) counts, pathology and dosimetry calculations. Results Survival was longer with 64Cu-DOTHA2-PSMA than with natCu-DOTHA2-PSMA (p < 0.001). Likewise, survival was also longer when compared to 177Lu-PSMA-617, although it did not reach statistical significance (p = 0.09). RBCs counts remained within normal range for the 64Cu-DOTHA2-PSMA group. 64Cu-DOTHA2-PSMA treated mice showed non-pathological fibrosis and no other signs of radiation injury. Human extrapolation of dosimetry yielded an effective dose of 3.14 × 10-2 mSv/MBq, with highest organs doses to gastrointestinal tract and liver. Discussion Collectively, our data showed that 64Cu-DOTHA2-PSMA-directed radioligand therapy was effective for the treatment of LNCaP tumor-bearing NRG mice with acceptable toxicity and dosimetry. The main potential challenge is the hepatic and gastrointestinal irradiation.
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Affiliation(s)
- Marie-Christine Milot
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Ophélie Bélissant-Benesty
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | | | - Samia Ait-Mohand
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Sameh Geha
- Department of Pathology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Patrick O. Richard
- Department of Surgery, Division of urology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Étienne Rousseau
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada,Sherbrooke Molecular Imaging Center (CIMS), Centre de recherche du CHUS, Sherbrooke, QC, Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada,Sherbrooke Molecular Imaging Center (CIMS), Centre de recherche du CHUS, Sherbrooke, QC, Canada,*Correspondence: Brigitte Guérin,
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Khosravifarsani M, Ait-Mohand S, Paquette B, Sanche L, Guérin B. In vivo behavior of [64Cu]NOTA-terpyridine platinum, a novel chemo-radio-theranostic agent for imaging, and therapy of colorectal cancer. Front Med (Lausanne) 2022; 9:975213. [PMID: 36226156 PMCID: PMC9549809 DOI: 10.3389/fmed.2022.975213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Accepted: 08/29/2022] [Indexed: 11/16/2022] Open
Abstract
To overcome resistance to chemotherapy for colorectal cancer, we propose to validate in vivo a novel terpyridine-platinum (TP) compound radiolabeled with the radio-theranostic isotope 64Cu. In vivo stability, biodistribution, PET imaging, tumor growth delay, toxicity and dosimetry of [64Cu]NOTA-C3-TP were determined. The current experimental studies show that [64Cu]NOTA-C3-TP is stable in vivo, rapidly eliminated by the kidneys and has a promising tumor uptake ranging from 1.8 ± 0.4 to 3.0 ± 0.2 %ID/g over 48 h. [64Cu]NOTA-C3-TP retarded tumor growth by up to 6 ± 2.0 days and improved survival relative to vehicle and non-radioactive [NatCu]NOTA-C3-TP over 17 days of tumor growth observation. This effect was obtained with only 0.4 nmol i.v. injection of [64Cu]NOTA-C3-TP, which delivers 3.4 ± 0.3 Gy tumoral absorbed dose. No evidence of toxicity, by weight loss or mortality was revealed. These findings confirm the high potential of [64Cu]NOTA-TP as a novel radio-theranostic agent.
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Affiliation(s)
- Meysam Khosravifarsani
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Samia Ait-Mohand
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Benoit Paquette
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Léon Sanche
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
- Sherbrooke Molecular Imaging Center (CIMS), Centre de Recherche du CHUS (CRCHUS), Université de Sherbrooke, Sherbrooke, QC, Canada
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Milot MC, Benesty OB, Dumulon-Perreault V, Ait-Mohand S, Richard PO, Rousseau É, Guérin B. 64Cu-DOTHA 2-PSMA, a Novel PSMA PET Radiotracer for Prostate Cancer with a Long Imaging Time Window. Pharmaceuticals (Basel) 2022; 15:ph15080996. [PMID: 36015144 PMCID: PMC9412875 DOI: 10.3390/ph15080996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
Prostate cancer imaging and late-stage management can be improved with prostate-specific membrane antigen (PSMA)-targeting radiotracers. We developed a PSMA positron emission tomography (PET) radiotracer, DOTHA2-PSMA radiolabeled with 64Cu (T1/2: 12.7 h), to leverage its large imaging time window. This preclinical study aimed to evaluate the biological and imaging properties of 64Cu-DOTHA2-PSMA. Its stability was assessed in plasma ex vivo and in mice. Cellular behavior was studied for up to 48 h in LNCaP cells. Biodistribution studies were performed in balb/c mice for up to 48 h. Dynamic (1 h) and static (4 h and 24 h) PET imaging was completed in LNCaP tumor-bearing mice. 64Cu-DOTHA2-PSMA was stable ex vivo in plasma and reached cellular internalization up to 34.1 ± 4.9% injected activity (IA)/106 cells at 48 h post-injection (p.i.). Biodistribution results showed significantly lower uptake in kidneys than 68Ga-PSMA-617, our reference PET tracer (p < 0.001), but higher liver uptake at 2 h p.i. (p < 0.001). PET images showed 64Cu-DOTHA2-PSMA’s highest tumoral uptake at 4 h p.i., with a significant difference between blocked and non-blocked groups from the time of injection to 24 h p.i. The high stability and tumor uptake with a long tumor imaging time window of 64Cu-DOTHA2-PSMA potentially contribute to the prostate cancer theranostic approach and its local recurrence detection.
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Affiliation(s)
- Marie-Christine Milot
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Ophélie Bélissant Benesty
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Véronique Dumulon-Perreault
- Sherbrooke Molecular Imaging Center (CIMS), Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), 3001, 12e Avenue Nord, Sherbrooke, QC J1H 5N4, Canada
| | - Samia Ait-Mohand
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Patrick O. Richard
- Department of Surgery, Division of Urology, Faculty of Medicine and Health Sciences, University de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
| | - Étienne Rousseau
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- Sherbrooke Molecular Imaging Center (CIMS), Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), 3001, 12e Avenue Nord, Sherbrooke, QC J1H 5N4, Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada
- Sherbrooke Molecular Imaging Center (CIMS), Centre de Recherche du Centre Hospitalier Universitaire de Sherbrooke (CRCHUS), 3001, 12e Avenue Nord, Sherbrooke, QC J1H 5N4, Canada
- Correspondence:
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Khosravifarsani M, Ait-Mohand S, Paquette B, Sanche L, Guerin B. Pharmacokinetic, dosimetry and antitumor efficacy of 64Cu/NOTA-terpyridine platinum, a potential radio-chemo-theranostic agent. Nucl Med Biol 2022. [DOI: 10.1016/s0969-8051(22)00148-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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6
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Khosravifarsani M, Ait-Mohand S, Paquette B, Sanche L, Guérin B. High Cytotoxic Effect by Combining Copper-64 with a NOTA-Terpyridine Platinum Conjugate. J Med Chem 2021; 64:6765-6776. [PMID: 33909440 DOI: 10.1021/acs.jmedchem.1c00039] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Terpyridine platinum (TP)-based chemotherapeutic agents target three-dimensional structures on DNA known as G-quadruplexes. We report the rational design and synthesis of a TP conjugate combined with copper-64 (64Cu), the decay characteristics of which include emission of β- and Auger electrons for radiotherapy and β+ particles for positron emission tomography (PET) imaging. The present experimental studies show that the novel [64Cu]Cu-1,4,7-triazacyclononane-1,4,7-triacetic acid (NOTA)-TP is stable, permitting selective killing of cancer cells. The antitumor activity of [64Cu]Cu-NOTA-TP at high apparent molar activity is in the low nanomolar range and 27,800-fold greater than that of natCu-NOTA-TP at 24 h post treatment. These results suggest that this combination of a cytotoxic TP agent with 64Cu has considerable potential for cancer treatment and PET imaging.
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Affiliation(s)
- Meysam Khosravifarsani
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Samia Ait-Mohand
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Benoit Paquette
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Léon Sanche
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada.,Sherbrooke Molecular Imaging Center (CIMS), CRCHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
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7
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Richard G, Noll C, Archambault M, Lebel R, Tremblay L, Ait-Mohand S, Guérin B, Blondin DP, Carpentier AC, Lepage M. Contribution of perfusion to the 11 C-acetate signal in brown adipose tissue assessed by DCE-MRI and 68 Ga-DOTA PET in a rat model. Magn Reson Med 2020; 85:1625-1642. [PMID: 33010059 DOI: 10.1002/mrm.28535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 08/15/2020] [Accepted: 09/07/2020] [Indexed: 12/29/2022]
Abstract
PURPOSE Determine if dynamic contrast enhanced (DCE) -MRI and/or 68 gallium 1,4,7,10-tetraazacyclododecane N, N', N″, N‴-tretraacetic acid (68 Ga-DOTA) positron emission tomography (PET) can assess perfusion in rat brown adipose tissue (BAT). Evaluate changes in perfusion between cold-stimulated and heat-inhibited BAT. Determine if the 11 C-acetate pharmacokinetic model can be constrained with perfusion information to improve assessment of BAT oxidative metabolism. METHODS Rats were split into three groups. In group 1 (N = 6), DCE-MRI with gadobutrol was compared directly to 68 Ga-DOTA PET following exposure to 10 °C for 48 h. 11 C-Acetate PET was also performed to assess oxidation. In group 2 (N = 4), only 68 Ga-DOTA PET was acquired following exposure to 10 °C for 48 h. Finally, in group 3 (N = 10), perfusion was assessed with DCE-MRI in rats exposed to 10 °C or 30 °C for 48 h, and oxidation was measured with 11 C-acetate. Perfusion was quantified with a two-compartment pharmacokinetic model, while oxidation was assessed by a four-compartment model. RESULTS DCE-MRI and 68 Ga-DOTA PET provided similar perfusion measures, but a decrease in the perfusion signal was noted with longer imaging sessions. Exposure to 10 °C or 30 °C did not affect the perfusion measures, but the 11 C-acetate signal increased in BAT at 10 °C. Without prior information about blood volume, the 11 C-acetate compartment model overestimated blood volume and underestimated oxidation in 10 °C BAT. CONCLUSION Precise assessment of oxidation via 11 C-acetate PET requires prior information about blood volume which can be obtained by DCE-MRI or 68 Ga-DOTA PET. Since perfusion can change rapidly, simultaneous PET-MRI would be preferred.
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Affiliation(s)
- Gabriel Richard
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Christophe Noll
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHUS, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Mélanie Archambault
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Réjean Lebel
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Luc Tremblay
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Samia Ait-Mohand
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Brigitte Guérin
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Denis P Blondin
- Division of Neurology, Department of Medicine, Centre de recherche du CHUS, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - André C Carpentier
- Division of Endocrinology, Department of Medicine, Centre de recherche du CHUS, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Martin Lepage
- Sherbrooke Molecular Imaging Center, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
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Milot M, Benesty OB, Dumulon-Perreault V, Ait-Mohand S, Rousseau É, Richard P, Guérin B. Theranostic 64Cu-DOTHA2-PSMA for metastatic prostate cancer treatment, a preclinical study. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)31128-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Alnahwi A, Ait-Mohand S, Dumulon-Perreault V, Dory YL, Guérin B. Promising Performance of 4HMS, a New Zirconium-89 Octadendate Chelator. ACS Omega 2020; 5:10731-10739. [PMID: 32455192 PMCID: PMC7240819 DOI: 10.1021/acsomega.0c00207] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
Over the last decade, the interest in zirconium-89 (89Zr) as a positron-emitting radionuclide increased considerably because of its standardized production and its physical half-life (78.41 h), which matches the biological half-life of antibodies and its successful use in preclinical and clinical applications. So far, desferrioxamine (DFO), a commercially available chelator, has been mainly used as a bifunctional chelating system. However, there are some concerns regarding the in vivo stability of the [89Zr]Zr-DFO complex. In this study, we report the synthesis of an acyclic N-hydroxy-N-methyl succinamide-based chelator (4HMS) with 8 coordination sites and our first investigations into the use of this new chelator for 89Zr complexation. In vitro and in vivo comparative studies with [89Zr]Zr-4HMS and [89Zr]Zr-DFO are presented. The 4HMS chelator was synthesized in four steps starting with an excellent overall yield. Both chelators were quantitatively labeled with 89Zr within 5-10 min at pH 7 and room temperature; the molar activity of [89Zr]Zr-4HMS exceeded (>3 times) that of [89Zr]Zr-DFO. [89Zr]Zr-4HMS remained stable against transmetalation and transchelation and cleared from most tissues within 24 h. The kidney, liver, bone, and spleen uptakes were significantly low for this 89Zr-complex. Positron emission tomography images were in accordance with the results of the biodistribution in healthy mice. Based on DFT calculations, a rationale is provided for the high stability of 89Zr-4HMS. This makes 4HMS a promising chelator for future development of 89Zr-radiopharmaceuticals.
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Affiliation(s)
- Aiman
H. Alnahwi
- Department
of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health
Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Samia Ait-Mohand
- Department
of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health
Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
| | - Véronique Dumulon-Perreault
- Sherbrooke
Molecular Imaging Center (CIMS), CRCHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Yves L. Dory
- Laboratoire
de Synthèse Supramoléculaire. Department of Chemistry,
Institut de Pharmacologie, Université
de Sherbooke, 3001, 12e
Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Brigitte Guérin
- Department
of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health
Sciences, Université de Sherbrooke, Sherbrooke, Québec J1H 5N4, Canada
- Sherbrooke
Molecular Imaging Center (CIMS), CRCHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
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10
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Alnahwi AH, Tremblay S, Ait-Mohand S, Beaudoin JF, Guérin B. Automated radiosynthesis of 68Ga for large-scale routine production using 68Zn pressed target. Appl Radiat Isot 2020; 156:109014. [DOI: 10.1016/j.apradiso.2019.109014] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 11/13/2019] [Accepted: 12/01/2019] [Indexed: 01/05/2023]
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Mansour N, Paquette M, Ait-Mohand S, Dumulon-Perreault V, Guérin B. Evaluation of a novel GRPR antagonist for prostate cancer PET imaging: [ 64 Cu]-DOTHA 2 -PEG-RM26. Nucl Med Biol 2018; 56:31-38. [DOI: 10.1016/j.nucmedbio.2017.10.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 10/17/2017] [Accepted: 10/18/2017] [Indexed: 02/08/2023]
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Pirisedigh A, Blais V, Ait-Mohand S, Abdallah K, Holleran BJ, Leduc R, Dory YL, Gendron L, Guérin B. Synthesis and Evaluation of a 64Cu-Conjugate, a Selective δ-Opioid Receptor Positron Emission Tomography Imaging Agent. Org Lett 2017; 19:2018-2021. [DOI: 10.1021/acs.orglett.7b00575] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Azadeh Pirisedigh
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Véronique Blais
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Samia Ait-Mohand
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Khaled Abdallah
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Brian J. Holleran
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Richard Leduc
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Yves L. Dory
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Louis Gendron
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
| | - Brigitte Guérin
- Department
of Nuclear Medicine and Radiobiology, ‡Department of Pharmacology and
Physiology, Faculty of Medicine and Health Sciences,
and §Laboratoire de Synthèse
Supramoléculaire, Department of Chemistry, Faculty of Sciences,
Institut de Pharmacologie, Université de Sherbrooke, Centre
de recherche du CHUS, 3001, 12e Avenue Nord, Sherbrooke, Québec J1H 5N4, Canada
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13
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Mansour N, Dumulon-Perreault V, Ait-Mohand S, Paquette M, Lecomte R, Guérin B. Impact of dianionic and dicationic linkers on tumor uptake and biodistribution of [64Cu]Cu/NOTA peptide-based gastrin-releasing peptide receptors antagonists. J Labelled Comp Radiopharm 2017; 60:200-212. [DOI: 10.1002/jlcr.3491] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/12/2017] [Accepted: 01/24/2017] [Indexed: 12/25/2022]
Affiliation(s)
- Nematallah Mansour
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences; Université de Sherbrooke and Sherbrooke Molecular Imaging Centre, Centre de recherche du CHUS (CRCHUS); Sherbrooke Canada
| | - Véronique Dumulon-Perreault
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences; Université de Sherbrooke and Sherbrooke Molecular Imaging Centre, Centre de recherche du CHUS (CRCHUS); Sherbrooke Canada
| | - Samia Ait-Mohand
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences; Université de Sherbrooke and Sherbrooke Molecular Imaging Centre, Centre de recherche du CHUS (CRCHUS); Sherbrooke Canada
| | - Michel Paquette
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences; Université de Sherbrooke and Sherbrooke Molecular Imaging Centre, Centre de recherche du CHUS (CRCHUS); Sherbrooke Canada
| | - Roger Lecomte
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences; Université de Sherbrooke and Sherbrooke Molecular Imaging Centre, Centre de recherche du CHUS (CRCHUS); Sherbrooke Canada
| | - Brigitte Guérin
- Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences; Université de Sherbrooke and Sherbrooke Molecular Imaging Centre, Centre de recherche du CHUS (CRCHUS); Sherbrooke Canada
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14
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Couture F, Levesque C, Dumulon-Perreault V, Ait-Mohand S, D'Anjou F, Day R, Guérin B. PACE4-based molecular targeting of prostate cancer using an engineered ⁶⁴Cu-radiolabeled peptide inhibitor. Neoplasia 2015; 16:634-43. [PMID: 25220591 PMCID: PMC4235008 DOI: 10.1016/j.neo.2014.07.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 07/28/2014] [Accepted: 07/31/2014] [Indexed: 01/14/2023] Open
Abstract
The potential of PACE4 as a pharmacological target in prostate cancer has been demonstrated as this proprotein convertase is strongly overexpressed in human prostate cancer tissues and its inhibition, using molecular or pharmacological approaches, results in reduced cell proliferation and tumor progression in mouse tumor xenograft models. We developed a PACE4 high-affinity peptide inhibitor, namely, the multi-leucine (ML), and sought to determine whether this peptide could be exploited for the targeting of prostate cancer for diagnostic or molecular imaging purposes. We conjugated a bifunctional chelator 1,4,7-triazacyclononane-1,4,7- triacetic acid (NOTA) to the ML peptide for copper-64 ((64)Cu) labeling and positron emission tomography (PET)- based prostate cancer detection. Enzyme kinetic assays against recombinant PACE4 showed that the NOTA-modified ML peptide displays identical inhibitory properties compared to the unmodified peptide. In vivo biodistribution of the (64)Cu/NOTA-ML peptide evaluated in athymic nude mice bearing xenografts of two human prostate carcinoma cell lines showed a rapid and high uptake in PACE4-expressing LNCaP tumor at an early time point and in PACE4-rich organs. Co-injection of unlabeled peptide confirmed that tumor uptake was target-specific. PACE4-negative tumors displayed no tracer uptake 15 minutes after injection, while the kidneys, demonstrated high uptake due to rapid renal clearance of the peptide. The present study supports the feasibility of using a (64)Cu/NOTA-ML peptide for PACE4-targeted prostate cancer detection and PACE4 status determination by PET imaging but also provides evidence that ML inhibitor-based drugs would readily reach tumor sites under in vivo conditions for pharmacological intervention or targeted radiation therapy.
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Affiliation(s)
- Frédéric Couture
- Institut de Pharmacologie de Sherbrooke, Department of Surgery/Urology Division, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Christine Levesque
- Institut de Pharmacologie de Sherbrooke, Department of Surgery/Urology Division, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Véronique Dumulon-Perreault
- Centre de Recherche Clinique Étienne-Le Bel, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Samia Ait-Mohand
- Centre de Recherche Clinique Étienne-Le Bel, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - François D'Anjou
- Institut de Pharmacologie de Sherbrooke, Department of Surgery/Urology Division, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - Robert Day
- Institut de Pharmacologie de Sherbrooke, Department of Surgery/Urology Division, Université de Sherbrooke, Sherbrooke, Québec, Canada.
| | - Brigitte Guérin
- Centre de Recherche Clinique Étienne-Le Bel, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, Sherbrooke, Québec, Canada.
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15
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Ait-Mohand S, Denis C, Tremblay G, Paquette M, Guérin B. Development of Bifunctional Chelates Bearing Hydroxamate Arms for Highly Efficient 64Cu Radiolabeling. Org Lett 2014; 16:4512-5. [DOI: 10.1021/ol5020575] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Samia Ait-Mohand
- Department
of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001 12th
North Avenue Sherbrooke, Quebec J1H 5N4, Canada
| | - Céline Denis
- Department
of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001 12th
North Avenue Sherbrooke, Quebec J1H 5N4, Canada
| | - Geneviève Tremblay
- Department
of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001 12th
North Avenue Sherbrooke, Quebec J1H 5N4, Canada
| | - Michel Paquette
- Department
of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001 12th
North Avenue Sherbrooke, Quebec J1H 5N4, Canada
| | - Brigitte Guérin
- Department
of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001 12th
North Avenue Sherbrooke, Quebec J1H 5N4, Canada
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), 3001 12th North Avenue Sherbrooke, Quebec J1H 5N4, Canada
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16
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Inkster J, Lin KS, Ait-Mohand S, Gosselin S, Bénard F, Guérin B, Pourghiasian M, Ruth T, Schaffer P, Storr T. 2-Fluoropyridine prosthetic compounds for the 18F labeling of bombesin analogues. Bioorg Med Chem Lett 2013; 23:3920-6. [PMID: 23683595 DOI: 10.1016/j.bmcl.2013.04.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 04/12/2013] [Accepted: 04/22/2013] [Indexed: 12/28/2022]
Abstract
Acetylene-bearing 2-[(18)F]fluoropyridines [(18)F]FPy5yne and PEG-[(18)F]FPyKYNE were prepared via efficient nucleophilic heteroaromatic [(18)F]fluorination of their corresponding 2-trimethylammoniumpyrdinyl precursors. The prosthetic groups were conjugated to azide- and PEG3-modified bombesin(6-14) analogues via copper-catalyzed azide-alkyne cycloaddition couplings to yield mono- and di-mini-PEGylated ligands for PET imaging of the gastrin- releasing peptide receptor. The PEG3- and PEG2/PEG3-bearing (18)F peptides showed decreased lipophilicity relative to an analogous non-mini-PEGylated (18)F peptide. Assessment of water-soluble peptide pharmacokinetics and tumour-targeting capabilities in a mouse model of prostate cancer is currently underway.
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Affiliation(s)
- James Inkster
- TRIUMF, Nuclear Medicine Division, 4004 Wesbrook Mall, Vancouver, Canada BC V6T 2A3.
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17
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Fournier P, Dumulon-Perreault V, Ait-Mohand S, Tremblay S, Bénard F, Lecomte R, Guérin B. Novel Radiolabeled Peptides for Breast and Prostate Tumor PET Imaging: 64Cu/and 68Ga/NOTA-PEG-[d-Tyr6,βAla11,Thi13,Nle14]BBN(6–14). Bioconjug Chem 2012; 23:1687-93. [DOI: 10.1021/bc3002437] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick Fournier
- Centre d’imagerie moléculaire
de Sherbrooke (CIMS), Centre Hospitalier Universitaire de Sherbrooke
and, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th Avenue
North, Sherbrooke, Quebec, Canada, J1H 5N4
| | - Véronique Dumulon-Perreault
- Centre d’imagerie moléculaire
de Sherbrooke (CIMS), Centre Hospitalier Universitaire de Sherbrooke
and, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th Avenue
North, Sherbrooke, Quebec, Canada, J1H 5N4
| | - Samia Ait-Mohand
- Centre d’imagerie moléculaire
de Sherbrooke (CIMS), Centre Hospitalier Universitaire de Sherbrooke
and, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th Avenue
North, Sherbrooke, Quebec, Canada, J1H 5N4
| | - Sébastien Tremblay
- Centre d’imagerie moléculaire
de Sherbrooke (CIMS), Centre Hospitalier Universitaire de Sherbrooke
and, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th Avenue
North, Sherbrooke, Quebec, Canada, J1H 5N4
| | - François Bénard
- BC Cancer Agency Research Centre, Vancouver, British Columbia, Canada
| | - Roger Lecomte
- Centre d’imagerie moléculaire
de Sherbrooke (CIMS), Centre Hospitalier Universitaire de Sherbrooke
and, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th Avenue
North, Sherbrooke, Quebec, Canada, J1H 5N4
| | - Brigitte Guérin
- Centre d’imagerie moléculaire
de Sherbrooke (CIMS), Centre Hospitalier Universitaire de Sherbrooke
and, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th Avenue
North, Sherbrooke, Quebec, Canada, J1H 5N4
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18
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Inkster JAH, Liu K, Ait-Mohand S, Schaffer P, Guérin B, Ruth TJ, Storr T. Sulfonyl fluoride-based prosthetic compounds as potential 18F labelling agents. Chemistry 2012; 18:11079-87. [PMID: 22807282 DOI: 10.1002/chem.201103450] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 05/03/2012] [Indexed: 12/12/2022]
Abstract
Nucleophilic incorporation of [(18)F]F(-) under aqueous conditions holds several advantages in radiopharmaceutical development, especially with the advent of complex biological pharmacophores. Sulfonyl fluorides can be prepared in water at room temperature, yet they have not been assayed as a potential means to (18)F-labelled biomarkers for PET chemistry. We developed a general route to prepare bifunctional 4-formyl-, 3-formyl-, 4-maleimido- and 4-oxylalkynl-arylsulfonyl [(18)F]fluorides from their sulfonyl chloride analogues in 1:1 mixtures of acetonitrile, THF, or tBuOH and Cs[(18)F]F/Cs(2)CO(3(aq.)) in a reaction time of 15 min at room temperature. With the exception of 4-N-maleimide-benzenesulfonyl fluoride (3), pyridine could be used to simplify radiotracer purification by selectively degrading the precursor without significantly affecting observed yields. The addition of pyridine at the start of [(18)F]fluorination (1:1:0.8 tBuOH/Cs(2)CO(3(aq.))/pyridine) did not negatively affect yields of 3-formyl-2,4,6-trimethylbenzenesulfonyl [(18)F]fluoride (2) and dramatically improved the yields of 4-(prop-2-ynyloxy)benzenesulfonyl [(18)F]fluoride (4). The N-arylsulfonyl-4-dimethylaminopyridinium derivative of 4 (14) can be prepared and incorporates (18)F efficiently in solutions of 100 % aqueous Cs(2)CO(3) (10 mg mL(-1)). As proof-of-principle, [(18)F]2 was synthesised in a preparative fashion [88(±8) % decay corrected (n=6) from start-of-synthesis] and used to radioactively label an oxyamino-modified bombesin(6-14) analogue [35(±6) % decay corrected (n=4) from start-of-synthesis]. Total preparation time was 105-109 min from start-of-synthesis. Although the (18)F-peptide exhibited evidence of proteolytic defluorination and modification, our study is the first step in developing an aqueous, room temperature (18)F labelling strategy.
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Affiliation(s)
- James A H Inkster
- Department of Nuclear Medicine, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada.
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19
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Fournier P, Dumulon-Perreault V, Ait-Mohand S, Langlois R, Bénard F, Lecomte R, Guérin B. Comparative study of 64Cu/NOTA-[D-Tyr6,βAla11,Thi13,Nle14]BBN(6-14) monomer and dimers for prostate cancer PET imaging. EJNMMI Res 2012; 2:8. [PMID: 22333272 PMCID: PMC3323469 DOI: 10.1186/2191-219x-2-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Accepted: 02/14/2012] [Indexed: 01/15/2023] Open
Abstract
Background Gastrin-releasing peptide receptors [GRPR] are highly over-expressed in multiple cancers and have been studied as a diagnostic target. Multimeric gastrin-releasing peptides are expected to have enhanced tumor uptake and affinity for GRPR. In this study, a 64Cu-labeled 1,4,7-triazacyclononane-1,4,7-triacetic acid [NOTA]-monomer and two NOTA-dimers of [D-Tyr6,βAla11, Thi13, Nle14]bombesin(6-14) ] [BBN(6-14)] were compared. Methods Monomeric and dimeric peptides were synthesized on solid phase support and radiolabeled with 64Cu. NOTA-dimer 1 consists of asymmetrically linked BBN(6-14), while NOTA-dimer 2 has similar spacer between the two BBN(6-14) ligands and the chelator. In vitro GRPR-binding affinities were determined with competitive binding assays on PC3 human prostate cancer cells. In vivo stability and biodistribution of radiolabeled compounds were assessed in Balb/c mice. Cellular uptake and efflux were measured with radiolabeled NOTA-monomer and NOTA-dimer 2 on PC3 cells for up to 4 h. In vivo biodistribution kinetics were measured in PC3 tumor-bearing Balb/c nude mice by μ-positron emission tomography [μPET] imaging and confirmed by dissection and counting. Results NOTA-monomer, NOTA-dimers 1 and 2 were prepared with purity of 99%. The inhibition constants of the three BBN peptides were comparable and in the low nanomolar range. All 64Cu-labeled peptides were stable up to 24 h in mouse plasma and 1 h in vivo. 64Cu/NOTA-dimer 2 featuring a longer spacer between the two BBN(6-14) ligands is a more potent GRPR-targeting probe than 64Cu/NOTA-dimer 1. PC3 tumor uptake profiles are slightly different for 64Cu/NOTA-monomer and 64Cu/NOTA-dimer 2; the monomeric BBN-peptide tracer exhibited higher tumor uptake during the first 0.5 h and a fast renal clearance resulting in higher tumor-to-muscle ratio when compared to 64Cu/NOTA-dimer 2. The latter exhibited higher tumor-to-blood ratio and was retained longer at the tumor site when compared to 64Cu/NOTA-monomer. Lower ratios of tumor-to-blood and tumor-to-muscle in blocking experiments showed GRPR-dependant tumor uptake for both tracers. Conclusion Both 64Cu/NOTA-monomer and 64Cu/NOTA-dimer 2 are suitable for detecting GRPR-positive prostate cancer in vivo by PET. Tumor retention was improved in vivo with 64Cu/NOTA-dimer 2 by applying polyvalency effect and/or statistical rebinding.
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Affiliation(s)
- Patrick Fournier
- Centre d'imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th North Avenue, Sherbrooke, Quebec, J1H 5N4, Canada.
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20
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Beaudoin J, Ioannoni R, López-Maury L, Bähler J, Ait-Mohand S, Guérin B, Dodani SC, Chang CJ, Labbé S. Mfc1 is a novel forespore membrane copper transporter in meiotic and sporulating cells. J Biol Chem 2011; 286:34356-72. [PMID: 21828039 DOI: 10.1074/jbc.m111.280396] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
To gain insight in the molecular basis of copper homeostasis during meiosis, we have used DNA microarrays to analyze meiotic gene expression in the model yeast Schizosaccharomyces pombe. Profiling data identified a novel meiosis-specific gene, termed mfc1(+), that encodes a putative major facilitator superfamily-type transporter. Although Mfc1 does not exhibit any significant sequence homology with the copper permease Ctr4, it contains four putative copper-binding motifs that are typically found in members of the copper transporter family of copper transporters. Similarly to the ctr4(+) gene, the transcription of mfc1(+) was induced by low concentrations of copper. However, its temporal expression profile during meiosis was distinct to ctr4(+). Whereas Ctr4 was observed at the plasma membrane shortly after induction of meiosis, Mfc1 appeared later in precursor vesicles and, subsequently, at the forespore membrane of ascospores. Using the fluorescent copper-binding tracker Coppersensor-1 (CS1), labile cellular copper was primarily detected in the forespores in an mfc1(+)/mfc1(+) strain, whereas an mfc1Δ/mfc1Δ mutant exhibited an intracellular dispersed punctate distribution of labile copper ions. In addition, the copper amine oxidase Cao1, which localized primarily in the forespores of asci, was fully active in mfc1(+)/mfc1(+) cells, but its activity was drastically reduced in an mfc1Δ/mfc1Δ strain. Furthermore, our data showed that meiotic cells that express the mfc1(+) gene have a distinct developmental advantage over mfc1Δ/mfc1Δ mutant cells when copper is limiting. Taken together, the data reveal that Mfc1 serves to transport copper for accurate and timely meiotic differentiation under copper-limiting conditions.
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Affiliation(s)
- Jude Beaudoin
- Départements de Biochimie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Quebec J1H 5N4, Canada
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21
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Ait-Mohand S, Fournier P, Dumulon-Perreault V, Kiefer GE, Jurek P, Ferreira CL, Bénard F, Guérin B. Evaluation of 64Cu-labeled bifunctional chelate-bombesin conjugates. Bioconjug Chem 2011; 22:1729-35. [PMID: 21761921 DOI: 10.1021/bc2002665] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Several bifunctional chelates (BFCs) were investigated as carriers of (64)Cu for PET imaging. The most widely used chelator for (64)Cu labeling of BFCs is DOTA (1,4,7,10-tetraazacyclododecane-N,N',N″,N'''-tretraacetic acid), even though this complex exhibits only moderate in vivo stability. In this study, we prepared a series of alternative chelator-peptide conjugates labeled with (64)Cu, measured in vitro receptor binding affinities in human breast cancer T47D cells expressing the gastrin-releasing peptide receptor (GRPR) and compared their in vivo stability in mice. DOTA-, NOTA-(1,4,7-triazacyclononane-1,4,7-triacetic acid), PCTA-(3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene-3,6,9-triacetic acid), and Oxo-DO3A-(1-oxa-4,7,10-triazacyclododecane-4,7,10-triacetic acid) peptide conjugates were prepared using H(2)N-Aoc-[d-Tyr(6),βAla(11),Thi(13),Nle(14)]bombesin(6-14) (BBN) as a peptide template. The BBN moiety was selected since it binds with high affinity to the GRPR, which is overexpressed on human breast cancer cells. A convenient synthetic approach for the attachment of aniline-BFC to peptides on solid support is also presented. To facilitate the attachment of the aniline-PCTA and aniline-Oxo-DO3A to the peptide via an amide bond, a succinyl spacer was introduced at the N-terminus of BBN. The partially protected aniline-BFC (p-H(2)N-Bn-PCTA(Ot-Bu)(3) or p-H(2)N-Bn-DO3A(Ot-Bu)(3)) was then coupled to the resulting N-terminal carboxylic acid preactivated with DEPBT/ClHOBt on resin. After cleavage and purification, the peptide-conjugates were labeled with (64)Cu using [(64)Cu]Cu(OAc)(2) in 0.1 M ammonium acetate buffer at 100 °C for 15 min. Labeling efficacy was >90% for all peptides; Oxo-DO3A-BBN was incubated an additional 150 min at 100 °C to achieve this high yield. Specific activities varied from 76 to 101 TBq/mmol. Competition assays on T47D cells showed that all BFC-BBN complexes retained high affinity for the GRPR. All BFC-BBN (64)Cu-conjugates were stable for over 20 h when incubated at 37 °C in mouse plasma samples. However, in vivo, only 37% of the (64)Cu/Oxo-DO3A complex remained intact after 20 h while the (64)Cu/DOTA-BBN complex was completely demetalated. In contrast, both (64)Cu/NOTA- and (64)Cu/PCTA-BBN conjugates remained stable during the 20 h time period. Our results indicate that it is possible to successfully conjugate aniline-BFC with peptide on solid support. Our data also show that (64)Cu-labeled NOTA- and PCTA-BBN peptide conjugates are promising radiotracers for PET imaging of many human cancers overexpressing the GRP receptor.
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Affiliation(s)
- Samia Ait-Mohand
- Centre d'imagerie moléculaire de Sherbrooke, Department of Nuclear Medicine and Radiobiology, Université de Sherbrooke, 3001, 12th North Avenue Sherbrooke, Qubec, Canada, J1H 5N4
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22
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Ali H, Ait-Mohand S, Gosselin S, van Lier JE, Guérin B. Phthalocyanine-Peptide Conjugates via Palladium-Catalyzed Cross-Coupling Reactions. J Org Chem 2011; 76:1887-90. [DOI: 10.1021/jo102083g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hasrat Ali
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, Canada J1H 5N4
| | - Samia Ait-Mohand
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, Canada J1H 5N4
| | - Simon Gosselin
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, Canada J1H 5N4
| | - Johan E. van Lier
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, Canada J1H 5N4
| | - Brigitte Guérin
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12e Avenue Nord, Sherbrooke, Québec, Canada J1H 5N4
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Guérin B, Ait-Mohand S, Tremblay MC, Dumulon-Perreault V, Fournier P, Bénard F. Total Solid-Phase Synthesis of NOTA-Functionalized Peptides for PET Imaging. Org Lett 2009; 12:280-3. [DOI: 10.1021/ol902601x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brigitte Guérin
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12th Avenue North, Sherbrooke, Québec, Canada J1H 5N4, and Department of Molecular Oncology, BC Cancer Agency Research Centre, and Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - Samia Ait-Mohand
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12th Avenue North, Sherbrooke, Québec, Canada J1H 5N4, and Department of Molecular Oncology, BC Cancer Agency Research Centre, and Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - Marie-Claude Tremblay
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12th Avenue North, Sherbrooke, Québec, Canada J1H 5N4, and Department of Molecular Oncology, BC Cancer Agency Research Centre, and Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - Véronique Dumulon-Perreault
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12th Avenue North, Sherbrooke, Québec, Canada J1H 5N4, and Department of Molecular Oncology, BC Cancer Agency Research Centre, and Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - Patrick Fournier
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12th Avenue North, Sherbrooke, Québec, Canada J1H 5N4, and Department of Molecular Oncology, BC Cancer Agency Research Centre, and Department of Radiology, University of British Columbia, Vancouver, BC, Canada
| | - François Bénard
- Centre d’imagerie moléculaire de Sherbrooke (CIMS), Department of Nuclear Medicine and Radiobiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12th Avenue North, Sherbrooke, Québec, Canada J1H 5N4, and Department of Molecular Oncology, BC Cancer Agency Research Centre, and Department of Radiology, University of British Columbia, Vancouver, BC, Canada
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Medebielle M, Ait-Mohand S, Burkhloder C, Dolbier WR, Laumond G, Aubertin AM. Syntheses of new difluoromethylene benzoxazole and 1,2,4-oxadiazole derivatives, as potent non-nucleoside HIV-1 reverse transcriptase inhibitors. J Fluor Chem 2005. [DOI: 10.1016/j.jfluchem.2004.12.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Auclair K, Kor C, Jackson S, Ait-Mohand S, Bernard D. P1-162 Progress towards the synthesis of a stable alpha-helical amyloid-β peptide. Neurobiol Aging 2004. [DOI: 10.1016/s0197-4580(04)80475-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Dolbier WR, Tian F, Duan JX, Li AR, Ait-Mohand S, Bautista O, Buathong S, Marshall Baker J, Crawford J, Anselme P, Cai XH, Modzelewska A, Koroniak H, Battiste MA, Chen QY. Trimethylsilyl fluorosulfonyldifluoroacetate (TFDA): a new, highly efficient difluorocarbene reagent. J Fluor Chem 2004. [DOI: 10.1016/j.jfluchem.2003.12.002] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
[reaction: see text] A novel method for highly regioselective and stereospecific nucleophilic trifluoromethylation of vicinal diol cyclic sulfates, using the reagent derived from reduction of trifluoromethyl iodide by tetrakis(dimethylamino)ethylene (TDAE), is presented.
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Affiliation(s)
- Naoto Takechi
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, USA
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Muzart J, N'Ait Ajjou A, Ait-Mohand S. Effective chromium-mediated oxidation of allylic and benzylic alcohols by sodium percarbonate. Tetrahedron Lett 1994. [DOI: 10.1016/s0040-4039(00)73029-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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