1
|
George J, Salcedo R, Greenberg R, Elshendidi H, McGregor D, Burton-Pye B, Francesconi LC, Paulenova A, Gelis AV, Poineau F. Speciation of Technetium Dibutylphosphate in the Third Phase Formed in the TBP/HNO 3 Solvent Extraction System. ACS Omega 2024; 9:15527-15534. [PMID: 38585070 PMCID: PMC10993392 DOI: 10.1021/acsomega.4c00393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/07/2024] [Accepted: 03/01/2024] [Indexed: 04/09/2024]
Abstract
The speciation of technetium in the nitric acid/dibutylphosphoric acid (HDBP)-n-dodecane system was studied by extended X-ray absorption fine structure (EXAFS) spectroscopy and theoretical methods. Tetravalent technetium, produced by the hydrazine reduction of TcO4- in 3 M HNO3, was extracted by HDBP in n-dodecane (30% by volume). During extraction, the splitting of the organic phase into a heavy phase and a light phase was observed. EXAFS analysis is consistent with the presence of Tc(NO3)3(DBP)(HDBP)2 in the light phase and Tc(NO3)2(DBP)2(HDBP)2 in the heavy phase. Density functional theory calculations at the B3LYP/6-31G* level confirm the stability of the proposed species and indicate that stereoisomers -mer- and fac-Tc(NO3)3(DBP)(HDBP)2 for the light phase and cis- and trans-Tc(NO3)2(DBP)2(HDBP)2 for the heavy phase] could coexist in the system (in the n-dodecane solution). Mechanisms of formation of Tc(NO3)3(DBP)(HDBP)2 and Tc(NO3)2(DBP)2(HDBP)2 are proposed.
Collapse
Affiliation(s)
- Jonathan George
- Radiochemistry
Program, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, Nevada 89154, United States
| | - Ramsey Salcedo
- Ph.D.
Program in Chemistry, Graduate Center of
the City University of New York, New York, New York 10016, United States
- Hunter
College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Lehman
College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Rachel Greenberg
- Ph.D.
Program in Chemistry, Graduate Center of
the City University of New York, New York, New York 10016, United States
- Hunter
College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Lehman
College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Hossam Elshendidi
- Ph.D.
Program in Chemistry, Graduate Center of
the City University of New York, New York, New York 10016, United States
- Hunter
College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Lehman
College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Donna McGregor
- Ph.D.
Program in Chemistry, Graduate Center of
the City University of New York, New York, New York 10016, United States
- Lehman
College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Benjamin Burton-Pye
- Ph.D.
Program in Chemistry, Graduate Center of
the City University of New York, New York, New York 10016, United States
- Lehman
College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Lynn C. Francesconi
- Ph.D.
Program in Chemistry, Graduate Center of
the City University of New York, New York, New York 10016, United States
- Hunter
College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Alena Paulenova
- School
of Nuclear Science and Engineering, 100 Radiation Center, Oregon State University, Corvallis, Oregon 97331-5903, United States
| | - Artem V. Gelis
- Radiochemistry
Program, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, Nevada 89154, United States
| | - Frederic Poineau
- Radiochemistry
Program, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, Nevada 89154, United States
| |
Collapse
|
2
|
Phipps MD, Cingoranelli S, Bhupathiraju NVSDK, Younes A, Cao M, Sanders VA, Neary MC, Daveny MH, Cutler CS, Lopez GE, Saini S, Parker CC, Fernandez SR, Lewis JS, Lapi SE, Francesconi LC, Deri MA. Sc-HOPO: A Potential Construct for Use in Radioscandium-Based Radiopharmaceuticals. Inorg Chem 2023; 62:20567-20581. [PMID: 36724083 PMCID: PMC10390652 DOI: 10.1021/acs.inorgchem.2c03931] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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] [Indexed: 02/02/2023]
Abstract
Three isotopes of scandium─43Sc, 44Sc, and 47Sc─have attracted increasing attention as potential candidates for use in imaging and therapy, respectively, as well as for possible theranostic use as an elementally matched pair. Here, we present the octadentate chelator 3,4,3-(LI-1,2-HOPO) (or HOPO), an effective chelator for hard cations, as a potential ligand for use in radioscandium constructs with simple radiolabeling under mild conditions. HOPO forms a 1:1 Sc-HOPO complex that was fully characterized, both experimentally and theoretically. [47Sc]Sc-HOPO exhibited good stability in chemical and biological challenges over 7 days. In healthy mice, [43,47Sc]Sc-HOPO cleared the body rapidly with no signs of demetalation. HOPO is a strong candidate for use in radioscandium-based radiopharmaceuticals.
Collapse
Affiliation(s)
- Michael D Phipps
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY 10016
- Department of Chemistry, City University of New York Hunter College, 695 Park Avenue, New York, New York 10065
- Department of Chemistry, Lehman College of the City University of New York, Bronx, NY 10468
- Medical Isotope Research & Production Laboratory, Collider-Accelerator Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Shelbie Cingoranelli
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | | | - Ali Younes
- Department of Chemistry, City University of New York Hunter College, 695 Park Avenue, New York, New York 10065
| | - Minhua Cao
- Department of Chemistry, City University of New York Hunter College, 695 Park Avenue, New York, New York 10065
| | - Vanessa A. Sanders
- Medical Isotope Research & Production Laboratory, Collider-Accelerator Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Michelle C. Neary
- Department of Chemistry, City University of New York Hunter College, 695 Park Avenue, New York, New York 10065
| | - Matthew H. Daveny
- Department of Chemistry, City University of New York Hunter College, 695 Park Avenue, New York, New York 10065
| | - Cathy S. Cutler
- Medical Isotope Research & Production Laboratory, Collider-Accelerator Division, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Gustavo E. Lopez
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY 10016
- Department of Chemistry, Lehman College of the City University of New York, Bronx, NY 10468
| | - Shefali Saini
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Candace C. Parker
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Solana R. Fernandez
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Jason S. Lewis
- Program in Molecular Pharmacology and Chemistry, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Suzanne E. Lapi
- Department of Radiology, University of Alabama at Birmingham, Birmingham, AL 35294
| | - Lynn C. Francesconi
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY 10016
- Department of Chemistry, City University of New York Hunter College, 695 Park Avenue, New York, New York 10065
| | - Melissa A. Deri
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY 10016
- Department of Chemistry, Lehman College of the City University of New York, Bronx, NY 10468
| |
Collapse
|
3
|
George J, Salcedo R, Greenberg R, Elshendidi H, McGregor D, Burton-Pye B, Francesconi LC, Paulenova A, Gelis AV, Poineau F. Structural Investigation of Technetium Dibutylphosphate Species Using X-ray Absorption Fine Structure Spectroscopy. Inorg Chem 2023; 62:16378-16387. [PMID: 37751567 DOI: 10.1021/acs.inorgchem.3c02010] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
The speciation of Tc after the extraction of Tc(IV) from H2O and 1 M HNO3 by dibutylphosphoric acid (HDBP) in dodecane has been studied by X-ray absorption fine structure (XAFS) spectroscopy. Results show the formation of dimeric species with Tc2O2 and Tc2O units, and the formulas [Tc2O2(DBP·HDBP)4] (1) and [Tc2O(NO3)2(DBP)2(DBP·HDBP)2] (2) were, respectively, proposed for the species extracted from H2O and 1 M HNO3. The interatomic Tc-Tc distances found in the Tc2O2 and Tc2O units [2.55(3) and 3.57(4) Å, respectively] are similar to the ones found in Tc(IV) dinuclear species. It is likely that the speciation of Tc(IV) in dodecane is due to the extraction of a species with a Tc2O unit for (2) and to the redissolution of a Tc(IV)-DBP solid for (1). The XAFS results for (1) and (2) were compared to that obtained for the extraction of Tc(IV) with TBP/HDBP/dodecane from 0.5 M HNO3, (3) which highlight the formation of Tc mononuclear nitrate species {i.e., [Tc(NO3)3(DBP)] or [Tc(NO3)2(DBP·HDBP)]}. These results confirm the importance of the preparation and speciation of the Tc(IV) aqueous solutions prior to extraction and how much this influences and drives the final Tc speciation in organic extraction. These studies outline the complexity of Tc separation chemistry and provide insights into the behavior of Tc during the reprocessing of used nuclear fuel.
Collapse
Affiliation(s)
- Jonathan George
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 S.Maryland Parkway, Las Vegas, Nevada 89154, United States
| | - Ramsey Salcedo
- Ph.D. Program in Chemistry, Graduate Center of the City University of New York, New York, New York 10016, United States
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Lehman College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Rachel Greenberg
- Ph.D. Program in Chemistry, Graduate Center of the City University of New York, New York, New York 10016, United States
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Lehman College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Hossam Elshendidi
- Ph.D. Program in Chemistry, Graduate Center of the City University of New York, New York, New York 10016, United States
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Lehman College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Donna McGregor
- Ph.D. Program in Chemistry, Graduate Center of the City University of New York, New York, New York 10016, United States
- Lehman College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Benjamin Burton-Pye
- Ph.D. Program in Chemistry, Graduate Center of the City University of New York, New York, New York 10016, United States
- Lehman College of the City University of New York, 250 Bedford Park Boulevard West, Bronx, New York 10468, United States
| | - Lynn C Francesconi
- Ph.D. Program in Chemistry, Graduate Center of the City University of New York, New York, New York 10016, United States
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Alena Paulenova
- Department of Nuclear Engineering and Radiation Health Physics, 100 Radiation Center, Oregon State University, Corvallis, Oregon 97331-5903, United States
| | - Artem V Gelis
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 S.Maryland Parkway, Las Vegas, Nevada 89154, United States
| | - Frederic Poineau
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 S.Maryland Parkway, Las Vegas, Nevada 89154, United States
| |
Collapse
|
4
|
Radivojevic Jovanovic I, Gallagher CMB, Salcedo R, Elshendidi H, Samson J, Drain CM, McGregor D, Lukens WW, Burton‐Pye BP, Francesconi LC. Reduction of Pertechnetate by Chemical and Photochemical Approaches and Incorporation of Tc(IV) into Titanium Dioxide. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ivana Radivojevic Jovanovic
- Department of Chemistry New York City College of Technology of the City University of New York 285 Jay Street, Brooklyn NY, 11201 New York USA
| | - Colleen M. B. Gallagher
- Department of Chemistry Hunter College of the City University of New York 695 Park Avenue NY, 10065 New York USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York NY, 10016 New York USA
| | - Ramsey Salcedo
- Department of Chemistry Hunter College of the City University of New York 695 Park Avenue NY, 10065 New York USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York NY, 10016 New York USA
| | - Hossam Elshendidi
- Ph.D. Program in Chemistry Graduate Center of the City University of New York NY, 10016 New York USA
- Department of Chemistry Lehman College of the City University of New York 250 Bedford Park Boulevard West, Bronx NY, 10468 New York USA
| | - Jacopo Samson
- Department of Chemistry Hunter College of the City University of New York 695 Park Avenue NY, 10065 New York USA
| | - Charles M. Drain
- Department of Chemistry Hunter College of the City University of New York 695 Park Avenue NY, 10065 New York USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York NY, 10016 New York USA
| | - Donna McGregor
- Ph.D. Program in Chemistry Graduate Center of the City University of New York NY, 10016 New York USA
- Department of Chemistry Lehman College of the City University of New York 250 Bedford Park Boulevard West, Bronx NY, 10468 New York USA
| | - Wayne W. Lukens
- Chemical Sciences Division The Glenn T. Seaborg Center E. O. Lawrence Berkley National Laboratory (LBNL) One Cyclotron Road 94720 Berkeley California USA
| | - Benjamin P. Burton‐Pye
- Ph.D. Program in Chemistry Graduate Center of the City University of New York NY, 10016 New York USA
- Department of Chemistry Lehman College of the City University of New York 250 Bedford Park Boulevard West, Bronx NY, 10468 New York USA
| | - Lynn C. Francesconi
- Department of Chemistry Hunter College of the City University of New York 695 Park Avenue NY, 10065 New York USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York NY, 10016 New York USA
| |
Collapse
|
5
|
Hatcher-Lamarre JL, Sanders VA, Rahman M, Cutler CS, Francesconi LC. Alpha emitting nuclides for targeted therapy. Nucl Med Biol 2021; 92:228-240. [PMID: 33558017 PMCID: PMC8363053 DOI: 10.1016/j.nucmedbio.2020.08.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/25/2020] [Accepted: 08/26/2020] [Indexed: 02/07/2023]
Abstract
Targeted alpha therapy (TAT) is an area of research with rapidly increasing importance as the emitted alpha particle has a significant effect on inducing cytotoxic effects on tumor cells while mitigating dose to normal tissues. Two significant isotopes of interest within the area of TAT are thorium-227 and actinium-225 due to their nuclear characteristics. Both isotopes have physical half-lives suitable for coordination with larger biomolecules, and additionally actinium-225 has potential to serve as an in vivo generator. In this review, the authors will discuss the production, purification, labeling reactions, and biological studies of actinium-225 and thorium-227 complexes and clinical studies.
Collapse
Affiliation(s)
| | - Vanessa A Sanders
- Collider Accelerator Department, Brookhaven National Laboratory, USA
| | - Mohammed Rahman
- Chemistry Department, Hunter College of the City University of New York, USA
| | - Cathy S Cutler
- Collider Accelerator Department, Brookhaven National Laboratory, USA
| | - Lynn C Francesconi
- Chemistry Department, Hunter College of the City University of New York, USA; Chemistry Department, Graduate Center of the City University of New York, USA.
| |
Collapse
|
6
|
Radivojevic Jovanovic I, Gallagher CMB, Salcedo R, Lukens WW, Burton‐Pye BP, McGregor D, Francesconi LC. Strategies for the Photoreduction of Tc‐99 Pertechnetate to Low‐Valent Tc by Keggin Polyoxometalates. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ivana Radivojevic Jovanovic
- Department of Chemistry, of the City University of New York New York City College of Technology 285 Jay Street 11201 Brooklyn NY USA
| | - Colleen M. B. Gallagher
- Hunter College of the City University of New York 695 Park Avenue 10065 New York NY USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
| | - Ramsey Salcedo
- Hunter College of the City University of New York 695 Park Avenue 10065 New York NY USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
- Lehman College of the City University of New York 250 Bedford Park Boulevard West 10468 Bronx NY USA
| | - Wayne W. Lukens
- Chemical Sciences Division The Glenn T. Seaborg Center E.O. Lawrence Berkeley National Laboratory (LBNL) One Cyclotron Road 94720 Berkeley California USA
| | - Benjamin P. Burton‐Pye
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
- Lehman College of the City University of New York 250 Bedford Park Boulevard West 10468 Bronx NY USA
| | - Donna McGregor
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
- Lehman College of the City University of New York 250 Bedford Park Boulevard West 10468 Bronx NY USA
| | - Lynn C. Francesconi
- Hunter College of the City University of New York 695 Park Avenue 10065 New York NY USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
| |
Collapse
|
7
|
Radivojevic Jovanovic I, Gallagher CMB, Salcedo R, Lukens WW, Burton‐Pye BP, McGregor D, Francesconi LC. Front Cover: Strategies for the Photoreduction of Tc‐99 Pertechnetate to Low‐Valent Tc by Keggin Polyoxometalates (Eur. J. Inorg. Chem. 22/2020). Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ivana Radivojevic Jovanovic
- Department of Chemistry, of the City University of New York New York City College of Technology 285 Jay Street Brooklyn NY USA
| | - Colleen M. B. Gallagher
- Hunter College of the City University of New York 695 Park Avenue 10065 New York NY USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
| | - Ramsey Salcedo
- Hunter College of the City University of New York 695 Park Avenue 10065 New York NY USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
- Lehman College of the City University of New York 250 Bedford Park Boulevard West 10468 Bronx NY USA
| | - Wayne W. Lukens
- Chemical Sciences Division The Glenn T. Seaborg Center E.O. Lawrence Berkeley National Laboratory (LBNL) One Cyclotron Road 94720 Berkeley California USA
| | - Benjamin P. Burton‐Pye
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
- Lehman College of the City University of New York 250 Bedford Park Boulevard West 10468 Bronx NY USA
| | - Donna McGregor
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
- Lehman College of the City University of New York 250 Bedford Park Boulevard West 10468 Bronx NY USA
| | - Lynn C. Francesconi
- Hunter College of the City University of New York 695 Park Avenue 10065 New York NY USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York 10016 New York NY USA
| |
Collapse
|
8
|
Abstract
Metallic radionuclides have been instrumental in the field of nuclear imaging for over half a century. While recent years have played witness to a dramatic rise in the use of radiometals as labels for chelator-bearing biomolecules, imaging agents based solely on coordination compounds of radiometals have long played a critical role in the discipline as well. In this work, we seek to provide a brief overview of metal complex-based radiopharmaceuticals for positron emission tomography (PET) and single photon emission computed tomography (SPECT). More specifically, we have focused on imaging agents in which the metal complex itself rather than a pendant biomolecule or targeting moiety is responsible for the in vivo behavior of the tracer. This family of compounds contains metal complexes based on an array of different nuclides as well as probes that have been used for the imaging of a variety of pathologies, including infection, inflammation, cancer, and heart disease. Indeed, two of the defining traits of transition metal complexes-modularity and redox chemistry-have both been creatively leveraged in the development of imaging agents. In light of our audience, particular attention is paid to structure and mechanism, though clinical data is addressed as well. Ultimately, it is our hope that this review will not only educate readers about some of the seminal work performed in this space over the last 30 years but also spur renewed interest in the creation of radiopharmaceuticals based on small metal complexes.
Collapse
Affiliation(s)
- Douglas S MacPherson
- Department of Chemistry, Hunter College of the City University of New York, New York, NY 10028, USA.
| | | | | | | | | |
Collapse
|
9
|
Burton‐Pye BP, Dembowski M, Lukens WW, Cruz A, Althour A, Lopez GE, Salcedo R, Gallagher CMB, McGregor D, Francesconi LC. Synthesis and Characterization of Non‐Aqueous [Tc
X
M‐PW
11
O
39
]
n
–
with M = O, N: Comparing Tc
V
and Tc
VI
in Metal Oxide Matrices. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900864] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Benjamin P. Burton‐Pye
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Mateusz Dembowski
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
| | - Wayne W. Lukens
- Chemical Sciences Division The Glenn T. Seaborg Center E.O. Lawrence Berkeley National Laboratory (LBNL) One Cyclotron Road Berkeley California 94720 USA
| | - Anthony Cruz
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Alrasheed Althour
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
| | - Gustavo E. Lopez
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Ramsey Salcedo
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
| | - Colleen M. B. Gallagher
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
| | - Donna McGregor
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Lynn C. Francesconi
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
| |
Collapse
|
10
|
Bhupathiraju NVSDK, Younes A, Cao M, Ali J, Cicek HT, Tully KM, Ponnala S, Babich JW, Deri MA, Lewis JS, Francesconi LC, Drain CM. Improved synthesis of the bifunctional chelator p-SCN-Bn-HOPO. Org Biomol Chem 2019; 17:6866-6871. [PMID: 31268109 PMCID: PMC6640124 DOI: 10.1039/c9ob01068h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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] [Indexed: 11/21/2022]
Abstract
The bifunctional ligand p-SCN-Bn-HOPO, which has four 1,2-hydroxypyridinone groups on a spermine backbone with an isothiocyanate linker, has been shown to be an efficient and stable chelator for Zr(iv) and, more importantly, the radioisotope 89Zr for use in radiolabeling antibodies for positron emission tomography (PET) imaging. Previous studies of 89Zr-HOPO-trastuzumab in mice showed low background, good tumor to organ contrast, and very low bone uptake which show p-SCN-Bn-HOPO to be an important next-generation bifunctional chelator for radioimmunoPET imaging with 89Zr. However, the reported synthesis of p-SCN-Bn-HOPO involves nine steps and multiple HPLC purifications with an overall yield of about 1.4%. Herein we report an improved and efficient synthesis of p-SCN-Bn-HOPO in four steps with 14.3% overall yield which will improve its availability for further biological studies and wider application in PET imaging. The new synthetic route also allows variation in linker length and chemistries which may be helpful in modifying in vivo clearance behaviors of future agents.
Collapse
Affiliation(s)
| | - Ali Younes
- Department of Chemistry, Hunter College of the City University of New York, New York, New York 10065, USA.
| | - Minhua Cao
- Department of Chemistry, Hunter College of the City University of New York, New York, New York 10065, USA.
| | - Jafar Ali
- Department of Chemistry, Hunter College of the City University of New York, New York, New York 10065, USA.
| | - Huseyin T Cicek
- Department of Chemistry, Hunter College of the City University of New York, New York, New York 10065, USA.
| | - Kathryn M Tully
- Department of Pharmacology, Weill Cornell Medicine, New York, NY 10065, USA and Department of Radiology, the Program in Pharmacology, and the Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Shashikanth Ponnala
- Radiopharmaceutical Sciences and Department of Radiology, Weill Cornell Medicine, New York, NY, USA
| | - John W Babich
- Radiopharmaceutical Sciences and Department of Radiology, Weill Cornell Medicine, New York, NY, USA
| | - Melissa A Deri
- Lehman College of the City University of New York, Bronx, New York 10468, USA and Chemistry Program, Graduate Center of the City University of New York, New York, New York 10016, USA
| | - Jason S Lewis
- Department of Pharmacology, Weill Cornell Medicine, New York, NY 10065, USA and Department of Radiology, the Program in Pharmacology, and the Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA
| | - Lynn C Francesconi
- Department of Chemistry, Hunter College of the City University of New York, New York, New York 10065, USA. and Chemistry Program, Graduate Center of the City University of New York, New York, New York 10016, USA
| | - Charles Michael Drain
- Department of Chemistry, Hunter College of the City University of New York, New York, New York 10065, USA. and Chemistry Program, Graduate Center of the City University of New York, New York, New York 10016, USA
| |
Collapse
|
11
|
Sanders VA, Iskhakov D, Abdel-Atti D, Devany M, Neary MC, Czerwinski KR, Francesconi LC. Synthesis, characterization and biological studies of rhenium, technetium-99m and rhenium-188 pentapeptides. Nucl Med Biol 2018; 68-69:1-13. [PMID: 30578134 DOI: 10.1016/j.nucmedbio.2018.11.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 05/10/2018] [Revised: 10/19/2018] [Accepted: 11/01/2018] [Indexed: 02/05/2023]
Abstract
A pentapeptide macrocyclic ligand, KYCAR (lysyl-tyrosyl-cystyl-alanyl-arginine), has been designed as a potential chelating ligand for SPECT imaging and therapeutic in vivo agents. This study shows the synthesis and characterization of KYCAR complexes containing nonradioactive rhenium, 99mTc, or 188Re. The metal complexes were also biologically evaluated to determine in vivo distribution in healthy mice. The overall goals of this project were (1) to synthesize the Tc/Re pentapeptide complexes, (2) to identify spectroscopic methods for characterization of syn versus anti rhenium peptide complexes, (3) to analyze the ex vivo stability, and (4) to assess the biological properties of the [99mTc]TcO-KYCAR and [188Re]ReO-KYCAR complexes in vivo. Details on these efforts are provided below. METHODS NatRe/99mTc/188ReO-KYCAR complexes were synthesized, and macroscopic species were characterized via HPLC, IR, NMR, and CD. These characterization data were compared to the crystallographic data of ReO-KYC to assist in the assignment of diastereomers and to aid in the determination of the structure of the complex. RESULTS The radiometal complexes were synthesized with high purity (>95%). HPLC, IR, NMR and CD data on the macroscopic natReO-KYCAR complexes confirm the successful complexation as well as the presence of two diastereomers in syn and anticonformations. Tracer level complexes show favorable stabilities ex vivo for 2+ h. CONCLUSION Macroscopic metal complexes form diastereomers with the KYCAR ligand; however, this phenomenon is not readily observed on the tracer level due to the rapid interconversion. It was determined through pKa measurements that the macroscopic natReO-KYCAR complex is 0 at physiological pH. The [99mTc]TcO-KYCAR is stable in vitro while the [188Re]ReO-KYCAR shows 50% decomposition in PBS and serum. Biologically, the tracer level complexes clear through the hepatobiliary pathway. Some decomposition of both tracers is evident by uptake in the thyroid and stomach.
Collapse
Affiliation(s)
- Vanessa A Sanders
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, NV, USA; Department of Chemistry, Hunter College of the City University of New York, New York, NY, USA.
| | - David Iskhakov
- Department of Chemistry, Hunter College of the City University of New York, New York, NY, USA
| | - Dalya Abdel-Atti
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Matthew Devany
- Department of Chemistry, Hunter College of the City University of New York, New York, NY, USA
| | - Michelle C Neary
- Department of Chemistry, Hunter College of the City University of New York, New York, NY, USA
| | - Ken R Czerwinski
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, NV, USA
| | - Lynn C Francesconi
- Department of Chemistry, Hunter College of the City University of New York, New York, NY, USA; Department of Chemistry, Graduate Center of the City University of New York, New York, NY, USA
| |
Collapse
|
12
|
Poty S, Francesconi LC, McDevitt MR, Morris MJ, Lewis JS. α-Emitters for Radiotherapy: From Basic Radiochemistry to Clinical Studies-Part 1. J Nucl Med 2018; 59:878-884. [PMID: 29545378 DOI: 10.2967/jnumed.116.186338] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [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: 08/04/2017] [Accepted: 02/03/2018] [Indexed: 12/11/2022] Open
Abstract
With a short particle range and high linear energy transfer, α-emitting radionuclides demonstrate high cell-killing efficiencies. Even with the existence of numerous radionuclides that decay by α-particle emission, only a few of these can reasonably be exploited for therapeutic purposes. Factors including radioisotope availability and physical characteristics (e.g., half-life) can limit their widespread dissemination. The first part of this review will explore the diversity, basic radiochemistry, restrictions, and hurdles of α-emitters.
Collapse
Affiliation(s)
- Sophie Poty
- Department of Radiology and Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Lynn C Francesconi
- Department of Chemistry, Hunter College, New York, New York.,Graduate Center of City University of New York, New York, New York
| | - Michael R McDevitt
- Department of Radiology and Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York.,Department of Radiology, Weill Cornell Medical College, New York, New York
| | - Michael J Morris
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York; and
| | - Jason S Lewis
- Department of Radiology and Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York .,Departments of Radiology and Pharmacology, Weill Cornell Medical College, New York, New York
| |
Collapse
|
13
|
Poty S, Francesconi LC, McDevitt MR, Morris MJ, Lewis JS. α-Emitters for Radiotherapy: From Basic Radiochemistry to Clinical Studies-Part 2. J Nucl Med 2018; 59:1020-1027. [PMID: 29496984 DOI: 10.2967/jnumed.117.204651] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [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: 11/03/2017] [Accepted: 02/03/2018] [Indexed: 12/30/2022] Open
Abstract
The use of radioactive sources to deliver cytotoxic ionizing radiation to disease sites dates back to the early 20th century, with the discovery of radium and its physiologic effects. α-emitters are of particular interest in the field of clinical oncology for radiotherapy applications. The first part of this review explored the basic radiochemistry, high cell-killing potency, and availability of α-emitting radionuclides, together with hurdles such as radiolabeling methods and daughter redistribution. The second part of this review will give an overview of the most promising and current uses of α-emitters in preclinical and clinical studies.
Collapse
Affiliation(s)
- Sophie Poty
- Department of Radiology and Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Lynn C Francesconi
- Department of Chemistry, Hunter College, New York, New York.,Graduate Center of City University of New York, New York, New York
| | - Michael R McDevitt
- Department of Radiology and Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York.,Department of Radiology, Weill Cornell Medical College, New York, New York
| | - Michael J Morris
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, New York; and
| | - Jason S Lewis
- Department of Radiology and Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center, New York, New York .,Departments of Radiology and Pharmacology, Weill Cornell Medical College, New York, New York
| |
Collapse
|
14
|
Gupta R, Huang W, Francesconi LC, Polenova T. Effect of positional isomerism and vanadium substitution on 51V magic angle spinning NMR Spectra Of Wells-Dawson polyoxotungstates. Solid State Nucl Magn Reson 2017; 84:28-33. [PMID: 27998683 PMCID: PMC5466850 DOI: 10.1016/j.ssnmr.2016.12.004] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 06/06/2023]
Abstract
We examined the positional isomerism and vanadium substitution on the 51V magic angle spinning NMR spectra of potassium salts of vanadium-substituted polyoxotungstates of the Wells-Dawson series. NMR parameters of this class of catalytically active polyoxotungstates effect of are reported. Multiple species, indicative of differences in the local environment at the substitution sites, are observed in solid-state NMR spectra of the di- and tri- substituted complexes in contrast to solution NMR spectra, where single average chemical shift was observed. The quadrupolar and chemical shift anisotropy parameters depend strongly on the position and the degree of the vanadium substitution into the oxoanion core establishing 51V SATRAS NMR spectroscopy as a sensitive probe of the local electronic environment in these catalytically active solids.
Collapse
Affiliation(s)
- Rupal Gupta
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Wenlin Huang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Lynn C Francesconi
- Department of Chemistry, City University of New York, Hunter College, 695 Park Avenue, New York 10021, USA; Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York 10016, USA.
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
| |
Collapse
|
15
|
Yazdani A, Bilton H, Vito A, Genady AR, Rathmann SM, Ahmad Z, Janzen N, Czorny S, Zeglis BM, Francesconi LC, Valliant JF. A Bone-Seeking trans-Cyclooctene for Pretargeting and Bioorthogonal Chemistry: A Proof of Concept Study Using 99mTc- and 177Lu-Labeled Tetrazines. J Med Chem 2016; 59:9381-9389. [PMID: 27676258 DOI: 10.1021/acs.jmedchem.6b00938] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A high yield synthesis of a novel, small molecule, bisphosphonate-modified trans-cyclooctene (TCO-BP, 2) that binds to regions of active bone metabolism and captures functionalized tetrazines in vivo, via the bioorthogonal inverse electron demand Diels-Alder (IEDDA) cycloaddition, was developed. A 99mTc-labeled derivative of 2 demonstrated selective localization to shoulder and knee joints in a biodistribution study in normal mice. Compound 2 reacted rapidly with a 177Lu-labeled tetrazine in vitro, and pretargeting experiments in mice, using 2 and the 177Lu-labeled tetrazine, yielded high activity concentrations in shoulder and knee joints, with minimal uptake in other tissues. Pretargeting experiments with 2 and a novel 99mTc-labeled tetrazine also produced high activity concentrations in the knees and shoulders. Critically, both radiolabeled tetrazines showed negligible uptake in the skeleton and joints when administered in the absence of 2. Compound 2 can be utilized to target functionalized tetrazines to bone and represents a convenient reagent to test novel tetrazines for use with in vivo bioorthogonal pretargeting strategies.
Collapse
Affiliation(s)
- Abdolreza Yazdani
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Holly Bilton
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Alyssa Vito
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Afaf R Genady
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Stephanie M Rathmann
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Zainab Ahmad
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Nancy Janzen
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Shannon Czorny
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - Brian M Zeglis
- Department of Chemistry, Hunter College , 695 Park Avenue New York, New York 10065, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York , 365 Fifth Avenue, New York, New York 10016, United States
| | - Lynn C Francesconi
- Department of Chemistry, Hunter College , 695 Park Avenue New York, New York 10065, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York , 365 Fifth Avenue, New York, New York 10016, United States
| | - John F Valliant
- Department of Chemistry and Chemical Biology, McMaster University , 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| |
Collapse
|
16
|
Deri MA, Ponnala S, Kozlowski P, Burton-Pye BP, Cicek HT, Hu C, Lewis JS, Francesconi LC. p-SCN-Bn-HOPO: A Superior Bifunctional Chelator for (89)Zr ImmunoPET. Bioconjug Chem 2015; 26:2579-91. [PMID: 26550847 DOI: 10.1021/acs.bioconjchem.5b00572] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Zirconium-89 has an ideal half-life for use in antibody-based PET imaging; however, when used with the chelator DFO, there is an accumulation of radioactivity in the bone, suggesting that the (89)Zr(4+) cation is being released in vivo. Therefore, a more robust chelator for (89)Zr could reduce the in vivo release and the dose to nontarget tissues. Evaluation of the ligand 3,4,3-(LI-1,2-HOPO) demonstrated efficient binding of (89)Zr(4+) and high stability; therefore, we developed a bifunctional derivative, p-SCN-Bn-HOPO, for conjugation to an antibody. A Zr-HOPO crystal structure was obtained showing that the Zr is fully coordinated by the octadentate HOPO ligand, as expected, forming a stable complex. p-SCN-Bn-HOPO was synthesized through a novel pathway. Both p-SCN-Bn-HOPO and p-SCN-Bn-DFO were conjugated to trastuzumab and radiolabeled with (89)Zr. Both complexes labeled efficiently and achieved specific activities of approximately 2 mCi/mg. PET imaging studies in nude mice with BT474 tumors (n = 4) showed good tumor uptake for both compounds, but with a marked decrease in bone uptake for the (89)Zr-HOPO-trastuzumab images. Biodistribution data confirmed the lower bone activity, measuring 17.0%ID/g in the bone at 336 h for (89)Zr-DFO-trastuzumab while (89)Zr-HOPO-trastuzumab only had 2.4%ID/g. We successfully synthesized p-SCN-Bn-HOPO, a bifunctional derivative of 3,4,3-(LI-1,2-HOPO) as a potential chelator for (89)Zr. In vivo studies demonstrate the successful use of (89)Zr-HOPO-trastuzumab to image BT474 breast cancer with low background, good tumor to organ contrast, and, importantly, very low bone uptake. The reduced bone uptake seen with (89)Zr-HOPO-trastuzumab suggests superior stability of the (89)Zr-HOPO complex.
Collapse
Affiliation(s)
- Melissa A Deri
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States.,Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York , 365 Fifth Ave, New York, New York 10016, United States
| | - Shashikanth Ponnala
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States.,Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Paul Kozlowski
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States.,Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Benjamin P Burton-Pye
- Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Huseyin T Cicek
- Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States
| | - Chunhua Hu
- Department of Chemistry, New York University , 100 Washington Square East, New York, New York 10003, United States
| | - Jason S Lewis
- Department of Radiology and the Program in Molecular Pharmacology, Memorial Sloan Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States
| | - Lynn C Francesconi
- Department of Chemistry, Hunter College of the City University of New York , 695 Park Avenue, New York, New York 10065, United States.,Ph.D. Program in Chemistry, The Graduate Center of the City University of New York , 365 Fifth Ave, New York, New York 10016, United States
| |
Collapse
|
17
|
Wagner T, Zeglis BM, Groveman S, Hille C, Pöthig A, Francesconi LC, Herrmann WA, Kühn FE, Reiner T. Synthesis of the first radiolabeled 188Re N-heterocyclic carbene complex and initial studies on its potential use in radiopharmaceutical applications. J Labelled Comp Radiopharm 2014; 57:441-7. [PMID: 24889257 PMCID: PMC4381871 DOI: 10.1002/jlcr.3203] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 03/27/2014] [Accepted: 04/01/2014] [Indexed: 11/08/2022]
Abstract
A novel approach towards the synthesis of radiolabeled organometallic rhenium complexes is presented. We successfully synthesized and analyzed the first (188)Re-labeled N-heterocyclic biscarbene complex, trans-dioxobis(1,1'-methylene-bis(3,3'-diisopropylimidazolium-2-ylidene))(188)rhenium(V) hexafluorophosphate ((188)Re-4) via transmetalation using an air-stable and moisture-stable silver(I) biscarbene complex. In order to assess the viability of this complex as a potential lead structure for in vivo applications, the stability of the (188)Re-NHC complex was tested in physiologically relevant media. Ultimately, our studies illustrate that the complex we synthesized dissociates rapidly and is therefore unsuitable for use in radiopharmaceuticals. However, it is clear that the transmetalation approach we have developed is a rapid, robust, and mild method for the synthesis of new (188)Re-labeled carbene complexes.
Collapse
Affiliation(s)
- Thomas Wagner
- Chair of Inorganic Chemistry/Molecular Catalysis, Department of Chemistry and Catalysis Research Center, Technische Universität München, Garching b. München, Germany
| | - Brian M. Zeglis
- Radiochemistry and Imaging Sciences Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | | | - Claudia Hille
- Chair of Inorganic Chemistry/Molecular Catalysis, Department of Chemistry and Catalysis Research Center, Technische Universität München, Garching b. München, Germany
| | - Alexander Pöthig
- Chair of Inorganic Chemistry/Molecular Catalysis, Department of Chemistry and Catalysis Research Center, Technische Universität München, Garching b. München, Germany
| | | | - Wolfgang A. Herrmann
- Chair of Inorganic Chemistry/Molecular Catalysis, Department of Chemistry and Catalysis Research Center, Technische Universität München, Garching b. München, Germany
| | - Fritz E. Kühn
- Chair of Inorganic Chemistry/Molecular Catalysis, Department of Chemistry and Catalysis Research Center, Technische Universität München, Garching b. München, Germany
| | - Thomas Reiner
- Radiochemistry and Imaging Sciences Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
- Center for Molecular Imaging and Nanotechnology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| |
Collapse
|
18
|
Deri MA, Ponnala S, Zeglis BM, Pohl G, Dannenberg JJ, Lewis JS, Francesconi LC. Alternative chelator for ⁸⁹Zr radiopharmaceuticals: radiolabeling and evaluation of 3,4,3-(LI-1,2-HOPO). J Med Chem 2014; 57:4849-60. [PMID: 24814511 PMCID: PMC4059252 DOI: 10.1021/jm500389b] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [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] [Indexed: 12/12/2022]
Abstract
![]()
Zirconium-89 is an effective radionuclide
for antibody-based positron
emission tomography (PET) imaging because its physical half-life (78.41
h) matches the biological half-life of IgG antibodies. Desferrioxamine
(DFO) is currently the preferred chelator for 89Zr4+; however, accumulation of 89Zr in the bones of
mice suggests that 89Zr4+ is released from DFO
in vivo. An improved chelator for 89Zr4+ could eliminate the release of osteophilic 89Zr4+ and lead to a safer PET tracer with reduced
background radiation dose. Herein, we present an octadentate chelator
3,4,3-(LI-1,2-HOPO) (or HOPO) as a potentially superior alternative
to DFO. The HOPO ligand formed a 1:1 Zr-HOPO complex that was evaluated
experimentally and theoretically. The stability of 89Zr-HOPO
matched or surpassed that of 89Zr-DFO in every experiment.
In healthy mice, 89Zr-HOPO cleared the body rapidly with
no signs of demetalation. Ultimately, HOPO has the potential to replace
DFO as the chelator of choice for 89Zr-based PET imaging
agents.
Collapse
Affiliation(s)
- Melissa A Deri
- Department of Radiology and the Program in Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Center , 1275 York Avenue, New York, New York 10065, United States
| | | | | | | | | | | | | |
Collapse
|
19
|
Thompson S, Ballard B, Jiang Z, Revskaya E, Sisay N, Miller WH, Cutler CS, Dadachova E, Francesconi LC. 166Ho and 90Y labeled 6D2 monoclonal antibody for targeted radiotherapy of melanoma: comparison with 188Re radiolabel. Nucl Med Biol 2014; 41:276-81. [PMID: 24533987 PMCID: PMC5437724 DOI: 10.1016/j.nucmedbio.2013.12.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Revised: 12/13/2013] [Accepted: 12/19/2013] [Indexed: 10/25/2022]
Abstract
INTRODUCTION An approach to radioimmunotherapy (RIT) of metastatic melanoma is the targeting of melanin pigment with monoclonal antibodies (mAbs) to melanin radiolabeled with therapeutic radionuclides. The proof of principle experiments were performed using a melanin-binding antibody 6D2 of IgM isotype radiolabeled with a β emitter (188)Re and demonstrated the inhibition of tumor growth. In this study we investigated the efficacy of 6D2 antibody radiolabeled with two other longer lived β emitters (90)Y and (166)Ho in treatment of experimental melanoma, with the objective to find a possible correlation between the efficacy and half-life of the radioisotopes which possess high energy β (E(max)>1.5 MeV) emission properties. METHODS 6D2 was radiolabeled with longer lived β emitters (90)Y and (166)Ho in treatment of experimental melanoma in A2058 melanoma tumor-bearing nude mice. The immunoreactivity of the radiolabeled 6D2 mAb, its in vitro binding to the MNT1 human melanoma cells, the biodistribution and therapy in A2058 human melanoma bearing nude mice as well as dosimetry calculations were performed. RESULTS When labeled with the longer lived (90)Y radionuclide, the 6D2 mAb did not produce any therapeutic effect in tumor bearing mice while the reduction of the tumor growth by (166)Ho-6D2 was very similar to the previously reported therapy results for (188)Re-6D2. In addition, (166)Ho-labeled mAb produced the therapeutic effect on the tumor without any toxic effects while the administration of the (90)Y-labeled radioconjugate was toxic to mice with no appreciable anti-tumor effect. CONCLUSIONS (166)Ho-labeled mAb to melanin produced some therapeutic effect on the tumor without any toxic effects while the administration of the (90)Y-labeled radioconjugate was toxic to mice with no appreciable anti-tumor effect. We concluded that the serum half-life of the 6D2 carrier antibody matched well the physical half-life of (166)Ho to deliver the tumoricidal absorbed dose to the tumor. Further investigation of this radionuclide for RIT of melanoma is warranted.
Collapse
Affiliation(s)
- S Thompson
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA.
| | - B Ballard
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA
| | - Z Jiang
- Albert Einstein College of Medicine, Bronx, NY, USA
| | - E Revskaya
- Albert Einstein College of Medicine, Bronx, NY, USA
| | - N Sisay
- Missouri University Research Reactor, Columbia, MO, 65211 USA
| | - W H Miller
- Missouri University Research Reactor, Columbia, MO, 65211 USA
| | - C S Cutler
- Missouri University Research Reactor, Columbia, MO, 65211 USA
| | - E Dadachova
- Albert Einstein College of Medicine, Bronx, NY, USA
| | - L C Francesconi
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA
| |
Collapse
|
20
|
McGregor D, Burton‐Pye BP, Lukens WW, Howell RC, Francesconi LC. Insights into Stabilization of the
99
Tc
V
O Core for Synthesis of
99
Tc
V
O Compounds. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201301034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Donna McGregor
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA, http://www.hunter.cuny.edu
- Department of Chemistry, Graduate Center of the City University of New York, New York, NY 10016, USA
| | - Benjamin P. Burton‐Pye
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA, http://www.hunter.cuny.edu
| | - Wayne W. Lukens
- Actinide Chemistry Group, Chemical Sciences Division, Lawrence Berkeley National Laboratory (LBNL) Berkeley, CA 94720, USA
| | - Robertha C. Howell
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA, http://www.hunter.cuny.edu
| | - Lynn C. Francesconi
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA, http://www.hunter.cuny.edu
- Department of Chemistry, Graduate Center of the City University of New York, New York, NY 10016, USA
| |
Collapse
|
21
|
Poineau F, Weck PF, Burton-Pye BP, Kim E, Francesconi LC, Sattelberger AP, German KE, Czerwinski KR. Diperoxo Pertechnetic Acid Characterized by Spectroscopic and Quantum Chemical Studies. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300383] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
22
|
Poineau F, Burton-Pye BP, Maruk A, Kirakosyan G, Denden I, Rego DB, Johnstone EV, Sattelberger AP, Fattahi M, Francesconi LC, German KE, Czerwinski KR. On the nature of heptavalent technetium in concentrated nitric and perchloric acid. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.12.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
23
|
Poineau F, Weck PF, Burton-Pye BP, Denden I, Kim E, Kerlin W, German KE, Fattahi M, Francesconi LC, Sattelberger AP, Czerwinski KR. Reactivity of HTcO4 with methanol in sulfuric acid: Tc-sulfate complexes revealed by XAFS spectroscopy and first principles calculations. Dalton Trans 2013; 42:4348-52. [DOI: 10.1039/c3dt32951h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Radivojevic I, Ithisuphalap K, Burton-Pye BP, Saleh R, Francesconi LC, Drain CM. Ternary phthalocyanato Hf(iv) and Zr(iv) polyoxometalate complexes. RSC Adv 2013. [DOI: 10.1039/c2ra22903j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
|
25
|
Deri MA, Zeglis BM, Francesconi LC, Lewis JS. PET imaging with ⁸⁹Zr: from radiochemistry to the clinic. Nucl Med Biol 2012; 40:3-14. [PMID: 22998840 DOI: 10.1016/j.nucmedbio.2012.08.004] [Citation(s) in RCA: 246] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2012] [Revised: 08/07/2012] [Accepted: 08/12/2012] [Indexed: 02/08/2023]
Abstract
The advent of antibody-based cancer therapeutics has led to the concomitant rise in the development of companion diagnostics for these therapies, particularly nuclear imaging agents. A number of radioisotopes have been employed for antibody-based PET and SPECT imaging, notably ⁶⁴Cu, ¹²⁴I, ¹¹¹In, and (99m)Tc; in recent years, however, the field has increasingly focused on ⁸⁹Zr, a radiometal with near ideal physical and chemical properties for immunoPET imaging. In the review at hand, we seek to provide a comprehensive portrait of the current state of ⁸⁹Zr radiochemical and imaging research, including work into the production and purification of the isotope, the synthesis of new chelators, the development of new bioconjugation strategies, the creation of novel ⁸⁹Zr-based agents for preclinical imaging studies, and the translation of ⁸⁹Zr-labeled radiopharmaceuticals to the clinic. Particular attention will also be dedicated to emerging trends in the field, ⁸⁹Zr-based imaging applications using vectors other than antibodies, the comparative advantages and limitations of ⁸⁹Zr-based imaging compared to that with other isotopes, and areas that would benefit from more extensive investigation. At bottom, it is hoped that this review will provide both the experienced investigator and new scientist with a full and critical overview of this exciting and fast-developing field.
Collapse
Affiliation(s)
- Melissa A Deri
- Department of Radiology and the Program in Molecular Pharmacology and Chemistry, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | | | | | | |
Collapse
|
26
|
Radivojevic I, Bazzan G, Burton-Pye BP, Ithisuphalap K, Saleh R, Durstock MF, Francesconi LC, Drain CM. Zirconium((IV)) and Hafnium((IV)) Porphyrin and Phthalocyanine Complexes as New Dyes for Solar Cell Devices. J Phys Chem C Nanomater Interfaces 2012; 116:15867-15877. [PMID: 22962625 PMCID: PMC3433074 DOI: 10.1021/jp301853d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Metalloporphyrin and metallophthalocyanine dyes ligating Hf(IV) and Zr(IV) ions bind to semiconductor oxide surfaces such as TiO(2) via the protruding group IV metal ions. The use of oxophylic metal ions with large ionic radii that protrude from the macrocycle is a unique mode of attaching chromophores to oxide surfaces in the design of dye-sensitized solar cells (DSSCs). Our previous report on the structure and physical properties of ternary complexes wherein the Hf(IV) and Zr(IV) ions are ligated to both a porphyrinoid and to a defect site on a polyoxometalate (POM) represents a model for this new way of binding dyes to oxide surfaces. The Zr(IV) and Hf(IV) complexes of 5,10,15,20-tetraphenylporphyrin (TPP) with two ligated acetates, (TPP)Hf(OAc)(2) and (TPP)Zr(OAc)(2), and the corresponding metallophthalocyanine (Pc) diacetate complexes, (Pc)Hf(OAc)(2) and (Pc)Zr(OAc)(2), were evaluated as novel dyes for the fabrication of dye-sensitized solar cells. Similarly to the ternary complexes with the POM, the oxide surface replaces the acetates to affect binding. In DSSCs the Zr(IV) phthalocyanine dye performs better than the Zr(IV) porphyrin dye, and reaches an overall efficiency of ~ 1.0%. The Hf(IV) dyes are less efficient. The photophysical properties of these complexes in solution suggested energetically favorable injection of electrons into the conduction band of TiO(2) semiconductor nanoparticles, as well as a good band gap match with I(3) (-)/I(-) pair in liquid 1-butyl-3-methyl imidazolium iodide. The combination of blue absorbing TPP with the red absorbing Pc complexes can increase the absorbance of solar light in the device; however, the overall conversion efficiency of DSSCs using TiO(2) nanoparticles treated with a mixture of both Zr(IV) complexes is comparable, but not greater than, the single (Pc)Zr. Thus, surface bound (TPP)Zr increases the absorbance in blue region of the spectra, but at the cost of diminished absorbance in the red in this DSSC architecture.
Collapse
|
27
|
McGregor D, Burton-Pye BP, Mbomekalle IM, Aparicio PA, Romo S, López X, Poblet JM, Francesconi LC. 99Tc and Re incorporated into metal oxide polyoxometalates: oxidation state stability elucidated by electrochemistry and theory. Inorg Chem 2012; 51:9017-28. [PMID: 22839965 DOI: 10.1021/ic3011713] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The radioactive element technetium-99 ((99)Tc, half-life = 2.1 × 10(5) years, β(-) of 253 keV), is a major byproduct of (235)U fission in the nuclear fuel cycle. (99)Tc is also found in radioactive waste tanks and in the environment at National Lab sites and fuel reprocessing centers. Separation and storage of the long-lived (99)Tc in an appropriate and stable waste-form is an important issue that needs to be addressed. Considering metal oxide solid-state materials as potential storage matrixes for Tc, we are examining the redox speciation of Tc on the molecular level using polyoxometalates (POMs) as models. In this study we investigate the electrochemistry of Tc complexes of the monovacant Wells-Dawson isomers, α(1)-P(2)W(17)O(61)(10-) (α1) and α(2)-P(2)W(17)O(61)(10-) (α2) to identify features of metal oxide materials that can stabilize the immobile Tc(IV) oxidation state accessed from the synthesized Tc(V)O species and to interrogate other possible oxidation states available to Tc within these materials. The experimental results are consistent with density functional theory (DFT) calculations. Electrochemistry of K(7-n)H(n)[Tc(V)O(α(1)-P(2)W(17)O(61))] (Tc(V)O-α1), K(7-n)H(n)[Tc(V)O(α(2)-P(2)W(17)O(61))] (Tc(V)O-α2) and their rhenium analogues as a function of pH show that the Tc-containing derivatives are always more readily reduced than their Re analogues. Both Tc and Re are reduced more readily in the lacunary α1 site as compared to the α2 site. The DFT calculations elucidate that the highest oxidation state attainable for Re is VII while, under the same electrochemistry conditions, the highest oxidation state for Tc is VI. The M(V)→ M(IV) reduction processes for Tc(V)O-α1 are not pH dependent or only slightly pH dependent suggesting that protonation does not accompany reduction of this species unlike the M(V)O-α2 (M = (99)Tc, Re) and Re(V)O-α1 where M(V/IV) reduction process must occur hand in hand with protonation of the terminal M═O to make the π*(M═O) orbitals accessible to the addition of electrons. This result is consistent with previous extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) data that reveal that the Tc(V) is "pulled" into the -α1 framework and that may facilitate the reduction of Tc(V)O-α1 and stabilize lower Tc oxidation states. This study highlights the inequivalency of the two sites, and their impact on the chemical properties of the Tc substituted in these positions.
Collapse
Affiliation(s)
- Donna McGregor
- Hunter College, City University of New York, 695 Park Avenue, New York, New York 10065, USA
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Burton-Pye BP, Jones I, Cutler CS, Howell RC, Francesconi LC. Investigation into the extraction speciation of rare-earth radioisotopes from aqueous solution using polyoxometalates. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.09.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
29
|
Burton-Pye BP, Radivojevic I, McGregor D, Mbomekalle IM, Lukens WW, Francesconi LC. Photoreduction of 99Tc Pertechnetate by Nanometer-Sized Metal Oxides: New Strategies for Formation and Sequestration of Low-Valent Technetium. J Am Chem Soc 2011; 133:18802-15. [DOI: 10.1021/ja2060929] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Benjamin P. Burton-Pye
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Ivana Radivojevic
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Donna McGregor
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Department of Chemistry, Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| | - Israel M. Mbomekalle
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Wayne W. Lukens
- Chemical Sciences Division, The Glenn T. Seaborg Center, E.O. Lawrence Berkeley National Laboratory (LBNL), One Cyclotron Road, Berkeley, California 94720, United States
| | - Lynn C. Francesconi
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Department of Chemistry, Graduate Center of the City University of New York, 365 Fifth Avenue, New York, New York 10016, United States
| |
Collapse
|
30
|
Ballard B, Jiang Z, Soll CE, Revskaya E, Cutler CS, Dadachova E, Francesconi LC. In vitro and in vivo evaluation of melanin-binding decapeptide 4B4 radiolabeled with 177Lu, 166Ho, and 153Sm radiolanthanides for the purpose of targeted radionuclide therapy of melanoma. Cancer Biother Radiopharm 2011; 26:547-56. [PMID: 21970319 DOI: 10.1089/cbr.2011.0954] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Melanoma is a malignancy with increasing incidence. Although primary tumors that are localized to the skin can be successfully treated by surgical removal, there is no satisfactory treatment for metastatic melanoma, a condition that has currently an estimated 5-year survival of just 6%. During the last decade, β- or α-emitter-radiolabeled peptides that bind to different receptors on a variety of tumors have been investigated as potential therapeutic agents in both the preclinical and clinical settings with encouraging results. A recent study demonstrated that 188-Rhenium ((188)Re)-labeled, via HYNIC ligand, fungal melanin-binding decapeptide 4B4 was effective against experimental MNT1 human melanoma and was safe to normal melanized tissues. The availability of radiolanthanides with diverse nuclear emission schemes and half-lives provides an opportunity to expand the repertoire of peptides for radionuclide therapy of melanoma. The melanin-binding decapeptide 4B4 was radiolabeled with (177)Lu, (166)Ho, and (153)Sm via a DO3A chelate. The stability studies of Ln*-DO3A-4B4 in phosphate-buffered saline, serum, and a hydroxyapatite assay demonstrated that (177)Lu-labeled peptide was more stable than (166)Ho- and (153)Sm-labeled peptides, most likely because of the smallest ionic radius of the former allowing for better complexation with DO3A. Binding of Ln*-DO3A-4B4 to the lysed highly melanized MNT1 melanoma cells demonstrated the specificity of peptides binding to melanin. In vivo biodistribution data for (177)Lu-DO3A-4B4 given by intraperitoneal administration to lightly pigmented human metastatic A2058 melanoma-bearing mice demonstrated very high uptake in the kidneys and low tumor uptake. Intravenous administration did not improve the tumor uptake. The plausible explanation of low tumor uptake of (177)Lu-DO3A-4B4 could be its decreased ability to bind to melanin during in vitro binding studies in comparison with (188)Re-HYNIC-4B4, exacerbated by the very fast clearance from the blood and the kidneys "sink" effect.
Collapse
Affiliation(s)
- Beau Ballard
- Department of Chemistry, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA
| | | | | | | | | | | | | |
Collapse
|
31
|
McGregor D, Burton-Pye BP, Howell RC, Mbomekalle IM, Lukens WW, Bian F, Mausolf E, Poineau F, Czerwinski KR, Francesconi LC. Synthesis, Structure Elucidation, and Redox Properties of 99Tc Complexes of Lacunary Wells−Dawson Polyoxometalates: Insights into Molecular 99Tc−Metal Oxide Interactions. Inorg Chem 2011; 50:1670-81. [DOI: 10.1021/ic102111t] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Donna McGregor
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Graduate Center of the City University of New York, New York, New York 10016, United States
| | - Benjamin P. Burton-Pye
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Robertha C. Howell
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Israel M. Mbomekalle
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
| | - Wayne W. Lukens
- Chemical Sciences Division, The Glenn T. Seaborg Center, E.O. Lawrence Berkeley National Laboratory (LBNL), One Cyclotron Road, Berkeley, California 94720, United States
| | - Fang Bian
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Graduate Center of the City University of New York, New York, New York 10016, United States
| | - Edward Mausolf
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, Nevada 89154, United States
| | - Frederic Poineau
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, Nevada 89154, United States
| | - Kenneth R. Czerwinski
- Department of Chemistry, University of Nevada Las Vegas, Las Vegas, Nevada 89154, United States
| | - Lynn C. Francesconi
- Hunter College of the City University of New York, 695 Park Avenue, New York, New York 10065, United States
- Graduate Center of the City University of New York, New York, New York 10016, United States
| |
Collapse
|
32
|
|
33
|
Burton-Pye BP, McGregor D, Mbomekalle IM, Francesconi LC. Investigation of new strategies for reduction of redox active radiometals Re-188/186 and Tc-99m. Nucl Med Biol 2010. [DOI: 10.1016/j.nucmedbio.2010.04.059] [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: 10/19/2022]
|
34
|
Antonio MR, Jing J, Burton-Pye BP, Francesconi LC. Series behavior of lanthanoid(iii) complexes with the α-1-Wells-Dawson heteropolyoxoanion in acetonitrile: electrochemistry and Ln coordination. Dalton Trans 2010; 39:7980-92. [PMID: 20672167 DOI: 10.1039/c0dt00394h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mark R Antonio
- Chemical Sciences & Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | | | | | | |
Collapse
|
35
|
Jyothish K, Vemula PK, Jadhav SR, Francesconi LC, John G. Self-standing, metal nanoparticle embedded transparent films from multi-armed cardanol conjugates through in situ synthesis. Chem Commun (Camb) 2009:5368-70. [DOI: 10.1039/b900208a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
36
|
Mishra PP, Jing J, Francesconi LC, Liu T. Self-assembly of Yttrium-containing lacunary polyoxotungstate macroanions in solution with controllable supramolecular structure size by pH or solvent content. Langmuir 2008; 24:9308-9313. [PMID: 18680322 DOI: 10.1021/la801366r] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The self-assembly and the formation of "Blackberry" type supramolecular structures for a type of Yttrium-containing polyoxometalate (K 15Na 6(H 3O) 9[(PY 2W 10O 38) 4(W 3O 14)].9H 2O, or {P 4Y 8W 43}) macroanions is characterized by using static and dynamic light scattering techniques. {P 4Y 8W 43} macroions are found to form hollow, spherical, single-layer "blackberry" structures in water and water-acetone mixed solvents. Very interestingly, the blackberry size can be accurately controlled by either changing acetone content in water-acetone mixed solvents, or by changing solution pH in aqueous solution. The blackberry size increases with decreasing pH (lower charge density) or higher acetone content in the mixed solvent (lower dielectric constant) and the blackberry size can change in responding to the change of external conditions. This indicates that the {P 4Y 8W 43} macroanions possess the properties of both "strong electrolyte type" and "weak electrolyte type" macroions, as we outlined previously. This is due to the special chemical feature of such clusters, which can be treated as Na 2HPO 4-type electrolytes in solution. The kinetics of the blackberry formation can be controlled by temperature.
Collapse
Affiliation(s)
- Padmaja P Mishra
- Department of Chemistry, Lehigh University, Bethlehem, Pennsylvania 18015, USA
| | | | | | | |
Collapse
|
37
|
Abstract
Strategies to create thin films using layer-by-layer methods use oppositely charged polymeric polyelectrolytes for both or at least one component to beneficially exploit multitopic electrostatic interactions between the deposited layers with opposite charges. In contrast, the electrostatic deposition of tetracationic 5,10,15,20-tetrakis(1'-methyl-4'-pyridinio)porphyrin tetra(p-toluenesulfonate) (TMPyP(4+)) with tetraanionic polyoxometalates such as EuPW(11)O(39)(4-) or SiW(12)O(40)(4-) onto charged substrates, such as mica, or polar substrates, such as glass and indium-tin oxide (ITO), demonstrates that the use of polymeric components is not a priori necessary. The use of molecules in sequential dipping approaches requires a careful balance in the interaction energies between the oppositely charged molecules, as demonstrated by the observation that a tetraanionic porphyrin such as 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrin does not form layers with TMPyP(4+). In the present case, these systems require several rounds of dipping to obtain films of uniform coverage and durability. The thin films deposited onto glass, quartz, ITO, and mica are surprisingly robust, since they are not removed by sonication in either organic solvents or 100 mM NaCl.
Collapse
Affiliation(s)
- Giorgio Bazzan
- Department of Chemistry and Biochemistry, Hunter College and Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10065
| | - Wendy Smith
- Department of Chemistry and Biochemistry, Hunter College and Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10065
| | - Lynn C. Francesconi
- Department of Chemistry and Biochemistry, Hunter College and Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10065
| | - Charles Michael Drain
- Department of Chemistry and Biochemistry, Hunter College and Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10065
- The Rockefeller University, 1230 York Avenue, New York, New York 10065
| |
Collapse
|
38
|
Huang W, Schopfer M, Zhang C, Howell RC, Todaro L, Gee BA, Francesconi LC, Polenova T. 31P magic angle spinning NMR spectroscopy of paramagnetic rare-earth-substituted Keggin and Wells-Dawson solids. J Am Chem Soc 2007; 130:481-90. [PMID: 18095677 DOI: 10.1021/ja0714585] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Paramagnetic rare-earth elements have been examined as NMR structural probes in polyoxoanionic solids, which have a variety of applications as luminescent materials that are usually disordered and therefore intractable by traditional structural methods. Thirteen Keggin and Wells-Dawson polyoxotungstates containing substitutions with lanthanides of different effective magnetic moments have been examined by 31P magic angle spinning NMR spectroscopy. The electron-nuclear dipolar interaction dominating the spinning sideband envelopes is determined by the lanthanide's magnetic moment and was found to be a sensitive probe of the nature of the polyoxoanion, of the positional isomerism, and of the ion stoichiometry. Electron-nuclear dipolar anisotropies computed based on the point-dipole approximation are generally in good agreement with the experimental results. The choice of a specific lanthanide as a structural probe can be tailored to the desired distance range between the phosphorus atoms and the paramagnetic centers to be probed. This approach is expected to be particularly useful in the paramagnetic polyoxoanionic materials lacking long-range order.
Collapse
Affiliation(s)
- Wenlin Huang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Cantorias MV, Howell RC, Todaro L, Cyr JE, Berndorff D, Rogers RD, Francesconi LC. MO tripeptide diastereomers (M=99/99mTc, Re): models to identify the structure of 99mTc peptide targeted radiopharmaceuticals. Inorg Chem 2007; 46:7326-40. [PMID: 17691766 PMCID: PMC2270398 DOI: 10.1021/ic070077p] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [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] [Indexed: 11/30/2022]
Abstract
Biologically active molecules, such as many peptides, serve as targeting vectors for radiopharmaceuticals based on 99mTc. Tripeptides can be suitable chelates and are easily and conveniently synthesized and linked to peptide targeting vectors through solid-phase peptide synthesis and form stable TcVO complexes. Upon complexation with [TcO]3+, two products form; these are syn and anti diastereomers, and they often have different biological behavior. This is the case with the approved radiopharmaceutical [99mTcO]depreotide ([99mTcO]P829, NeoTect) that is used to image lung cancer. [99mTcO]depreotide indeed exhibits two product peaks in its HPLC profile, but assignment of the product peaks to the diastereomers has proven to be difficult because the metal peptide complex is difficult to crystallize for structural analysis. In this study, we isolated diastereomers of [99TcO] and [ReO] complexes of several tripeptide ligands that model the metal chelator region of [99mTcO]depreotide. Using X-ray crystallography, we observed that the early eluting peak (A) corresponds to the anti diastereomer, where the Tc=O group is on the opposite side of the plane formed by the ligand backbone relative to the pendant groups of the tripeptide ligand, and the later eluting peak (B) corresponds to the syn diastereomer, where the Tc=O group is on the same side of the plane as the residues of the tripeptide. 1H NMR and circular dichroism (CD) spectroscopy report on the metal environment and prove to be diagnostic for syn or anti diastereomers, and we identified characteristic features from these techniques that can be used to assign the diastereomer profile in 99mTc peptide radiopharmaceuticals like [99mTcO]depreotide and in 188Re peptide radiotherapeutic agents. Crystallography, potentiometric titration, and NMR results presented insights into the chemistry occurring under physiological conditions. The tripeptide complexes where lysine is the second amino acid crystallized in a deprotonated metallo-amide form, possessing a short N1-M bond. The pKa measurements of the N1 amine (pKa approximately 5.6) suggested that this amine is rendered more acidic by both metal complexation and the presence of the lysine residue. Furthermore, peptide chelators incorporating a lysine (like the chelator of [TcO]depreotide) likely exist in the deprotonated form in vivo, comprising a neutral metal center. Deprotonation possibly mediates the interconversion process between the syn and anti diastereomers. The N1 amine group on non-lysine-containing metallopeptides is not as acidic (pKa approximately 6.8) and does not deprotonate and crystallize as do the metallo-amide species. Three of the tripeptide ligands (FGC, FSC, and FKC) were radiolabeled with 99mTc, and the individual syn and anti isomers were isolated for biodistribution studies in normal female nude mice. The main organs of uptake were the liver, intestines, and kidneys, with the FGC compounds exhibiting the highest liver uptake. In comparing the diastereomers, the syn compounds had substantially higher organ uptake and slower blood clearance than the anti compounds.
Collapse
Affiliation(s)
- Melchor V. Cantorias
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - Robertha C. Howell
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - Louis Todaro
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - John E. Cyr
- Research Laboratories of Schering AG, Radiopharmaceuticals Research, Berlin, Germany
| | - Dietmar Berndorff
- Research Laboratories of Schering AG, Radiopharmaceuticals Research, Berlin, Germany
| | - Robin D. Rogers
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487
| | - Lynn C. Francesconi
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| |
Collapse
|
40
|
Huang W, Francesconi LC, Polenova T. 31P Magic Angle Spinning NMR Spectroscopy for Probing Local Environments in Paramagnetic Europium-Substituted Wells−Dawson Polyoxotungstates. Inorg Chem 2007; 46:7861-9. [PMID: 17715914 DOI: 10.1021/ic700521p] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [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] [Indexed: 11/29/2022]
Abstract
A series of europium-substituted Wells-Dawson polyoxotungstates were addressed by 31P magic angle spinning (MAS) NMR spectroscopy. The electron-nuclear dipolar interaction dominates the 31P spinning-sideband envelopes. The experimental electron-nuclear dipolar anisotropies were found to be in good agreement with those calculated based on the known crystallographic coordinates and effective magnetic moments and assuming a point-dipole approximation. These electron-nuclear dipolar anisotropies directly report on the anion stoichiometry and on the positional isomerism, indicating that 31P MAS NMR spectroscopy may be a useful and quick analytical probe of the local environment in Wells-Dawson solids containing localized europium paramagnetic centers.
Collapse
Affiliation(s)
- Wenlin Huang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
| | | | | |
Collapse
|
41
|
Cyr JE, Pearson DA, Nelson CA, Lyons BA, Zheng Y, Bartis J, He J, Cantorias MV, Howell RC, Francesconi LC. Isolation, characterization, and biological evaluation of syn and anti diastereomers of [(99m)Tc]technetium depreotide: a somatostatin receptor binding tumor imaging agent. J Med Chem 2007; 50:4295-303. [PMID: 17691760 PMCID: PMC2330168 DOI: 10.1021/jm060887v] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [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] [Indexed: 10/23/2022]
Abstract
The early and later eluting [(99m)TcO]depreotide products on RP-HPLC were confirmed to be the anti and syn diastereomers, respectively, based on proton NMR and circular dichroism spectroscopy. NMR provided evidence of a folded, conformationally constrained structure for the syn diastereomer. The syn diastereomer is predominant (anti/syn approximately 10:90) in the [(99m)TcO]depreotide preparation and shows a slightly higher affinity (IC50 = 0.15 nM) for the somatostatin receptor than the anti diastereomer (IC50 = 0.89 nM). Both diastereomers showed higher binding affinities than the free peptide (IC(50) = 7.4 nM). Biodistribution studies in AR42J tumor xenograft nude mice also showed higher tumor uptake for syn [(99m)TcO]depreotide (6.58% ID/g) than for the anti [(99m)TcO]depreotide (3.38% ID/g). Despite the differences in biological efficacy, the favorable binding affinity, tumor uptake, and tumor-to-background ratio results for both diastereomeric species predict that both are effective for imaging somatostatin receptor-positive tumors in vivo.
Collapse
Affiliation(s)
- John E. Cyr
- Diatide Research Laboratories, 9 Delta Drive, Londonderry, New Hampshire 03053
- Research Laboratories of Schering AG, Radiopharmaceuticals Research, Berlin, Germany
- * To whom correspondence should be addressed. John Cyr, Bayer Healthcare Pharmaceuticals, 2600 Hilltop Dr., Richmond, California 94804. Phone: (510) 669-4225. Fax: (510) 669-4770. E-mail: . Lynn C. Francesconi, Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, New York, New York 10021. Phone: (212) 772-5353. Fax: (212) 772-5332. E-mail:
| | - Daniel A. Pearson
- Diatide Research Laboratories, 9 Delta Drive, Londonderry, New Hampshire 03053
| | - Carol A. Nelson
- Diatide Research Laboratories, 9 Delta Drive, Londonderry, New Hampshire 03053
| | - Barbara A. Lyons
- University of Vermont College of Medicine, Burlington, Vermont 05405
| | - Yongyong Zheng
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - Judit Bartis
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - Jiafang He
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - Melchor V. Cantorias
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - Robertha C. Howell
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
| | - Lynn C. Francesconi
- Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, 695 Park Avenue, New York, New York 10021
- * To whom correspondence should be addressed. John Cyr, Bayer Healthcare Pharmaceuticals, 2600 Hilltop Dr., Richmond, California 94804. Phone: (510) 669-4225. Fax: (510) 669-4770. E-mail: . Lynn C. Francesconi, Department of Chemistry, Hunter College and the Graduate Center of the City University of New York, New York, New York 10021. Phone: (212) 772-5353. Fax: (212) 772-5332. E-mail:
| |
Collapse
|
42
|
Huang W, Schopfer M, Zhang C, Howell RC, Gee BA, Francesconi LC, Polenova T. Probing Local Environments in Paramagnetic Europium-Substituted Keggin Solids by 31P Magic Angle Spinning NMR Spectroscopy. J Phys Chem B 2006; 110:12340-50. [PMID: 16800557 DOI: 10.1021/jp061990z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [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] [Indexed: 11/30/2022]
Abstract
Paramagnetic Eu-substituted Keggin oxopolytungstates crystallize in different forms, determined by the nature of the counterions. The crystal packing is in turn responsible for the variations in the geometry of paramagnetic Eu sites with respect to the anion core. We probed the paramagnetic environments in a series of Eu-substituted Keggin solids, by 31P magic angle spinning NMR spectroscopy. 31P spinning sideband envelopes are dominated by the electron-nuclear dipolar interaction. For the compounds under investigation, both the magnitude and the asymmetry parameter of the electron-nuclear dipolar coupling tensor are sensitive to the mutual arrangements of paramagnetic Eu sites in the crystal lattice. and also report on the stoichiometry of the anion. The electron-nuclear dipolar coupling tensors were calculated from the crystallographic coordinates and the experimentally determined effective magnetic moments, assuming a point dipole approximation. The computed tensors are in very good agreement with the experimental spectra. Furthermore, the P-Eu distance estimates, accurate to within 0.06-0.12 A, can be obtained directly from the magnitude of the electron-nuclear dipolar coupling. This work demonstrates that 31P MAS NMR spectroscopy is a useful probe for investigating local environments in paramagnetic Keggin solids.
Collapse
Affiliation(s)
- Wenlin Huang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
| | | | | | | | | | | | | |
Collapse
|
43
|
Zhang C, Bensaid L, McGregor D, Fang X, Howell RC, Burton-Pye B, Luo Q, Todaro L, Francesconi LC. Influence of the Lanthanide Ion and Solution Conditions on Formation of Lanthanide Wells–Dawson Polyoxotungstates. J CLUST SCI 2006. [DOI: 10.1007/s10876-006-0066-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
44
|
Boglio C, Lenoble G, Duhayon C, Hasenknopf B, Thouvenot R, Zhang C, Howell RC, Burton-Pye BP, Francesconi LC, Lacôte E, Thorimbert S, Malacria M, Afonso C, Tabet JC. Production and Reactions of Organic-Soluble Lanthanide Complexes of the Monolacunary Dawson [α1-P2W17O61]10- Polyoxotungstate. Inorg Chem 2006; 45:1389-98. [PMID: 16441151 DOI: 10.1021/ic051679g] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [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] [Indexed: 11/28/2022]
Abstract
The incorporation of lanthanides into polyoxometalates provides entry to new classes of potentially useful materials that combine the intrinsic properties of both constituents. To utilize the [alpha1-Ln(H2O)4P2W17O61]7- species in applications of catalysis and development of luminescent materials, the chemistry of this family of lanthanide polyoxometalates in organic solvents has been developed. Organic-soluble polyoxometalate-lanthanide complexes TBA5H2[alpha1-Ln(H2O)4P2W17O61] (Ln = La(III), Sm(III), Eu(III), Yb(III)) were prepared and characterized by elemental analysis, acid-base titration, IR, 31P NMR, and mass spectrometry. The synthetic procedure involves a cation metathesis reaction in aqueous solution under strict pH control. A solid-liquid-phase transfer protocol yielded a unique species (TBA)8K3[Yb(alpha1-YbP2W17O61)2] with three ytterbium ions and two [alpha1-P2W17O61]10- polyoxotungstates. A centrosymmetric dimeric complex [{alpha1-La(H2O)4P2W17O61}2]14- was crystallized from aqueous solution and characterized by X-ray diffraction. ESI mass spectral analysis of the complexes TBA5H2[alpha1-Ln(H2O)4P2W17O61] shows that similar dimers exist in organic solution, in particular for the early lanthanides. Fragmentation in the mass spectrometer of the complexes from dry acetonitrile solution involves double protonation of an oxo ligand and loss of one water molecule. Low mass tungstate fragments combine into [(WO3)n]2- (n = 1-5) ions and their condensation products with phosphate. Reaction of TBA5H2[alpha1-Eu(H2O)4P2W17O61] with 1,10-phenanthroline or 2,2'-bipyridine showed an increase of the europium luminescence. This result is explained by the formation of a ternary complex of [alpha1-Eu(H2O)4P2W17O61]7- and two sensitizing ligands.
Collapse
Affiliation(s)
- Cécile Boglio
- Laboratoire de Chimie Inorganique et Matériaux Moléculaires, UMR CNRS 7071, Institut de Chimie Moléculaire FR 2769, Université Pierre et Marie Curie, Case Courrier 42, 4 place Jussieu, 75005 Paris, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Zhang X, Zhang C, Guo H, Huang W, Polenova T, Francesconi LC, Akins DL. Optical Spectra of a Novel Polyoxometalate Occluded within Modified MCM-41. J Phys Chem B 2005; 109:19156-60. [PMID: 16853470 DOI: 10.1021/jp052858m] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [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] [Indexed: 11/28/2022]
Abstract
The novel polyoxometalate ([(Eu2PW10O38)4(W3O8(H2O)2(OH)4)]22-), also referred to herein as Eu8P4W43, has been immobilized inside the channels of MCM-41 mesoporous molecular sieve material by means of the incipient wetness method. For proper host-guest interaction, amine groups were introduced into the system as a result of an aminosilylation procedure. A stable and integrated Eu8P4W43 polyoxometalate was shown to be formed inside the channels of the modified MCM-41. The products were characterized by XRD, UV-vis absorption, emission, Raman excitation, Raman, and 31P solid-state NMR measurements. Infrared and Raman spectra of the polyoxometalate/MCM-41 composite systems are interpreted as showing spectral shifts due to site induced electrostatic interactions. The photoluminescent behavior of the composite at room temperature indicates a characteristic Eu3+ emission pattern corresponding to 5D0- 7F(J) transitions. A strong photoluminescence suggests the potential utility of the polyoxometalate as a luminescent material.
Collapse
Affiliation(s)
- Xiaoming Zhang
- Center for Analysis of Structures and Interfaces (CASI), Department of Chemistry, The City College of The City University of New York (CUNY), New York, New York 10031, USA
| | | | | | | | | | | | | |
Collapse
|
46
|
Zhang C, Howell RC, McGregor D, Bensaid L, Rahyab S, Nayshtut M, Lekperic S, Francesconi LC. Synthesis of a cluster containing Eu(III) α2-P2W17O6110- and preliminary luminescence experiments. CR CHIM 2005. [DOI: 10.1016/j.crci.2005.03.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
47
|
Zhang C, Howell RC, Luo QH, Fieselmann HL, Todaro LJ, Francesconi LC. Influence of Steric and Electronic Properties of the Defect Site, Lanthanide Ionic Radii, and Solution Conditions on the Composition of Lanthanide(III) α1-P2W17O6110- Polyoxometalates. Inorg Chem 2005; 44:3569-78. [PMID: 15877440 DOI: 10.1021/ic050103o] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [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] [Indexed: 11/28/2022]
Abstract
This study identifies the principles that govern the formation and stability of Ln complexes of the (alpha(1)-P(2)W(17)O(61))(10-) isomer. The conditional stability constants for the stepwise formation equilibria, K(1cond) and K(2cond), determined by (31)P NMR spectroscopy, show that the high log K(1cond)/log K(2cond) ratio predicts the stabilization of the 1:1 Ln/ (alpha(1)-P(2)W(17)O(61))(10-) species. The value of log K(1cond) increases as the Ln series is traversed, consistent with the high charge/size requirement of the basic alpha(1) defect site. The conditional stability constants, K(2), are very low and are highly dependent on the countercations in the buffer. The source of the instability is understood from the crystal structures of the early-mid lanthanide analogues, where the close contact of the (alpha(1)-P(2)W(17)O(61))(10-) units result in severe steric encumbrance. The electronic properties of the alpha(1) defect along with the lanthanide ionic radii and countercation composition are important parameters that need to be considered for a rational synthesis of lanthanide polyoxometalates.
Collapse
Affiliation(s)
- Cheng Zhang
- Department of Chemistry, Hunter College and the Graduate School of the City University of New York, New York, 10021, USA
| | | | | | | | | | | |
Collapse
|
48
|
Abstract
The incorporation of lanthanide ions into polyoxometalates may be a unique approach to generate new luminescent, magnetic, and catalytic functional materials. To realize these new applications of lanthanide polyoxometalates, it is imperative to understand the solution speciation chemistry and its impact on solid-state materials. In this study we find that the aqueous speciation of europium(III) and the trivacant polyoxometalate, PW9O34 9-, is a function of pH, countercation, and stoichiometry. For example, at low pH, the lacunary (PW11O39)7- predominates and the 1:1 Eu(PW11O39)4-, 2, forms. As the pH is increased, the 1:2 complex, Eu(PW11O39)2 11- species, 3, and (NH4)22[(Eu2PW10O38)4(W3O8(H2O)2(OH)4].44H2O, a Eu8 hydroxo/oxo cluster, 1, form. Countercations modulate this effect; large countercations, such as K+ and Cs+, promote the formation of species 3 and 1. Addition of Al(III) as a counterion results in low pH and formation of [Eu(H2O)3(alpha-2-P2W17O61)]2, 4, with Al(III) counterions bound to terminal W-O bonds. The four species observed in these speciation studies have been isolated, crystallized, and characterized by X-ray crystallography, solution multinuclear NMR spectroscopy, and other appropriate tech-niques. These species are 1, (NH4)22[(Eu2PW10O38)4(W3O8(H2O)2(OH)4].44H2O (P; a=20.2000(0), b=22.6951(6), c=25.3200(7) A; alpha=65.6760(10), beta=88.5240(10), gamma=86.0369(10) degrees; V=10550.0(5) A3; Z=2), 2, Al(H3O)[Eu(H2O)2PW11O34].20H2O (P, a=11.4280(23), b=11.5930(23), c=19.754(4) A; alpha=103.66(3), beta=95.29(3), gamma=102.31(3) degrees; V =2456.4(9) A3; Z=2), 3, Cs11Eu(PW11O34)2.28H2O (P; a=12.8663(14), b=19.8235(22), c=21.7060(23) A; alpha=114.57(0), beta=91.86(0), gamma=102.91(0) degrees ; V=4858.3(9) A3; Z=2), 4, Al2(H3O)8[Eu(H2O)3(alpha-2-P2W17O61)]2.29H2O (P; a=12.649(6), b=16.230(8), c=21.518(9) A; alpha=111.223(16), beta=94.182(18), gamma=107.581(17) degrees ; V=3842(3) A3; Z=1).
Collapse
Affiliation(s)
- Cheng Zhang
- Department of Chemistry, Hunter College and Graduate School of the City University of New York, New York 10021, USA
| | | | | | | | | | | |
Collapse
|
49
|
Huang W, Todaro L, Yap GPA, Beer R, Francesconi LC, Polenova T. 51V Magic Angle Spinning NMR Spectroscopy of Keggin Anions [PVnW12-nO40](3+n)-: Effect of Countercation and Vanadium Substitution on Fine Structure Constants. J Am Chem Soc 2004; 126:11564-73. [PMID: 15366903 DOI: 10.1021/ja0475499] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.8] [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] [Indexed: 11/30/2022]
Abstract
Vanadium environments in Keggin oxopolytungstates were characterized by (51)V solid-state MAS NMR spectroscopy. (C(4)H(9))(4)N(+)-, K(+)-, Cs(+)-, as well as mixed Na(+)/Cs(+)- salts of the mono-, di-, and trivanadium substituted oxotungstates, [VW(11)O(40)](4-), [V(2)W(10)O(40)](5-), and [V(3)W(9)O(40)](6-), have been prepared as microcrystalline and crystalline solids. Solid-state NMR spectra report on the local environment of the vanadium site in these Keggin ions via their anisotropic quadrupolar and chemical-shielding interactions. These (51)V fine structure constants in the solid state are determined by the number of vanadium atoms present in the oxoanion core. Surprisingly, the quadrupolar anisotropy tensors do not depend to any significant extent on the nature of the countercations. On the other hand, the chemical-shielding anisotropy tensors, as well as the isotropic chemical shifts, display large variations as a function of the cationic environment. This information can be used as a probe of the local cationic environment in the vanadium-substituted Keggin solids.
Collapse
Affiliation(s)
- Wenlin Huang
- Contribution from the Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | | | | | | | | | | |
Collapse
|
50
|
Francesconi LC, Zheng Y, Bartis J, Blumenstein M, Costello C, De Rosch MA. Preparation and Characterization of [99TcO] Apcitide: A Technetium Labeled Peptide. Inorg Chem 2004; 43:2867-75. [PMID: 15106974 DOI: 10.1021/ic035473w] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [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] [Indexed: 11/29/2022]
Abstract
[99mTcO] apcitide (99mTcO(P246)), the technetium complex of the 13 amino acid, apcitide, cyclo-(D-Tyr-Apc-Gly-Asp-Cys)-Gly-Gly-Cys(Acm)-Gly-Cys(Acm)-Gly-Gly-Cys-NH2, where Apc is L-[S-(3-aminopropyl)]cysteine (an arginine mimetic) and Acm is the acetamidomethyl protecting group, has high affinity and selectivity for the GPIIb/IIIa receptor that is expressed on the membrane surface of activated platelets and plays an integral role in platelet aggregation and thrombus formation. Bibapcitide, a 26 amino acid, bis-succinimidomethyl ether-linked dimer of the peptide apcitide has been formulated as a single-vial, lyophilized kit having the trade name AcuTect. When sterile, nonpyrogenic sodium pertechnetate (99mTcO4-) in 0.9% sodium chloride is added to the AcuTect radiopharmaceutical kit and the resulting kit is heated, [99mTcO] apcitide forms. This is the first radiopharmaceutical to target acute deep vein thrombosis (DVT) in the lower extremities. We report here the preparation, purification, and isolation of the 99Tc complex of apcitide and its characterization to determine the mode of binding of Tc to apcitide. [99TcO] apcitide was prepared, on the macroscopic level, by reaction of [99TcOCl4]- with apcitide, purified by preparative HPLC and isolated as a trifluoroacetate salt. [99TcO] apcitide can also be formed from the reaction of bibapcitide and 99TcO4- in the presence of Sn(II) and glucoheptonate at 80 degrees C, conditions that mimic the radiopharmaceutical kit preparation. FTIR data show a Tc=O stretch at 961.2 cm(-1), in the range observed for anionic [TcVO]3+ amide thiolate complexes. The mass spectral data is in agreement with the formula, [C51H73O20N17S5Tc]-, consistent with retention of Acm groups and the Tc binding in the Gly11-Gly12-Cys13 region of the peptide. Despite significant spectral overlap due to numerous similar amino acids, all protons of apcitide and [99TcO] apcitide were unambiguously assigned. The observation of two nonequivalent Acm groups and the observation of only 10 NH-CH cross-peaks in the TOCSY and COSY spectra of [99TcO] apcitide (NH-CH cross-peaks were absent for Gly11-Gly12-Cys13), compared to all 13 cross-peaks found in apcitide, provided compelling evidence to support the 99Tc binding to the terminal Gly11-Gly12-Cys13 region of apcitide.
Collapse
Affiliation(s)
- Lynn C Francesconi
- Department of Chemistry, Hunter College and the Graduate School of the City University of New York, New York, New York 10021, USA.
| | | | | | | | | | | |
Collapse
|