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Morris O, Fairclough M, Grigg J, Prenant C, McMahon A. A review of approaches to 18
F radiolabelling affinity peptides and proteins. J Labelled Comp Radiopharm 2018; 62:4-23. [DOI: 10.1002/jlcr.3634] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 04/23/2018] [Accepted: 04/23/2018] [Indexed: 12/15/2022]
Affiliation(s)
- O. Morris
- Wolfson Molecular Imaging Centre; The University of Manchester; UK
- CRUK/EPSRC Imaging Centre in Cambridge & Manchester; The University of Manchester; UK
| | - M. Fairclough
- Wolfson Molecular Imaging Centre; The University of Manchester; UK
- CRUK/EPSRC Imaging Centre in Cambridge & Manchester; The University of Manchester; UK
| | | | - C. Prenant
- Wolfson Molecular Imaging Centre; The University of Manchester; UK
- CRUK/EPSRC Imaging Centre in Cambridge & Manchester; The University of Manchester; UK
| | - A. McMahon
- Wolfson Molecular Imaging Centre; The University of Manchester; UK
- CRUK/EPSRC Imaging Centre in Cambridge & Manchester; The University of Manchester; UK
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Fairclough M, Ellis B, Boutin H, Jones A, McMahon A, Alzabin S, Gennari A, Prenant C. Development of a method for the preparation of zirconium-89 radiolabelled chitosan nanoparticles as an application for leukocyte trafficking with positron emission tomography. Appl Radiat Isot 2017; 130:7-12. [DOI: 10.1016/j.apradiso.2017.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 09/01/2017] [Accepted: 09/04/2017] [Indexed: 01/08/2023]
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Morris O, Elsawy MA, Fairclough M, Williams KJ, Mcmahon A, Grigg J, Forster D, Miller AF, Saiani A, Prenant C. In vivo characterisation of a therapeutically relevant self-assembling 18 F-labelled β-sheet forming peptide and its hydrogel using positron emission tomography. J Labelled Comp Radiopharm 2017. [PMID: 28623878 PMCID: PMC5601235 DOI: 10.1002/jlcr.3534] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Positron emission tomography (PET) and fluorescence labelling have been used to assess the pharmacokinetics, biodistribution and eventual fate of a hydrogel‐forming nonapeptide, FEFKFEFKK (F9), in healthy mice, using 18F‐labelled and fluorescein isothiocyanate (FITC)‐labelled F9 analogues. F9 was site‐specifically radiolabelled with 2‐[18F]fluoro‐3‐pyridinecarboxaldehyde ([18F]FPCA) via oxime bond formation. [18F]FPCA‐F9 in vivo fate was evaluated both as a solution, following intravenous administration, and as a hydrogel when subcutaneously injected. The behaviour of FITC‐F9 hydrogel was assessed following subcutaneous injection. [18F]FPCA‐F9 demonstrated high plasma stability and primarily renal excretion; [18F]FPCA‐F9 when in solution and injected into the bloodstream displayed prompt bladder uptake (53.4 ± 16.6 SUV at 20 minutes postinjection) and rapid renal excretion, whereas [18F]FPCA‐F9 hydrogel, formed by co‐assembly of [18F]FPCA‐F9 monomer with unfunctionalised F9 peptide and injected subcutaneously, showed gradual bladder accumulation of hydrogel fragments (3.8 ± 0.4 SUV at 20 minutes postinjection), resulting in slower renal excretion. Gradual disaggregation of the F9 hydrogel from the site of injection was monitored using FITC‐F9 hydrogel in healthy mice (60 ± 3 over 96 hours), indicating a biological half‐life between 1 and 4 days. The in vivo characterisation of F9, both as a gel and a solution, highlights its potential as a biomaterial.
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Affiliation(s)
- O Morris
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - M A Elsawy
- School of Materials, The University of Manchester, UK.,Manchester Institute of Biotechnology, The University of Manchester, UK.,School of Pharmacy and Biomedical Sciences, University of Central Lancashire, UK
| | - M Fairclough
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - K J Williams
- CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK.,Manchester Pharmacy School, The University of Manchester, UK
| | - A Mcmahon
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - J Grigg
- GE Healthcare, Little Chalfont, UK
| | - D Forster
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
| | - A F Miller
- Manchester Institute of Biotechnology, The University of Manchester, UK.,School of Chemical Engineering and Analytical Science, The University of Manchester, UK
| | - A Saiani
- School of Materials, The University of Manchester, UK.,Manchester Institute of Biotechnology, The University of Manchester, UK.,School of Chemical Engineering and Analytical Science, The University of Manchester, UK
| | - C Prenant
- Wolfson Molecular Imaging Centre, The University of Manchester, UK.,CRUK/EPSRC Imaging Centre in Cambridge & Manchester, The University of Manchester, UK
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Fairclough M, Prenant C, Ellis B, Boutin H, McMahon A, Brown G, Locatelli P, Jones A. A new technique for the radiolabelling of mixed leukocytes with zirconium-89 for inflammation imaging with positron emission tomography. J Labelled Comp Radiopharm 2016; 59:270-6. [PMID: 27061114 PMCID: PMC5074313 DOI: 10.1002/jlcr.3392] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 02/01/2016] [Accepted: 02/29/2016] [Indexed: 12/11/2022]
Abstract
Mixed leukocyte (white blood cells [WBCs]) trafficking using positron emission tomography (PET) is receiving growing interest to diagnose and monitor inflammatory conditions. PET, a high sensitivity molecular imaging technique, allows precise quantification of the signal produced from radiolabelled moieties. We have evaluated a new method for radiolabelling WBCs with either zirconium-89 ((89) Zr) or copper-64 ((64) Cu) for PET imaging. Chitosan nanoparticles (CNs) were produced by a process of ionotropic gelation and used to deliver radiometals into WBCs. Experiments were carried out using mixed WBCs freshly isolated from whole human blood. WBCs radiolabelling efficiency was higher with [(89) Zr]-loaded CN (76.8 ± 9.6% (n = 12)) than with [(64) Cu]-loaded CN (26.3 ± 7.0 % (n = 7)). [(89) Zr]-WBCs showed an initial loss of 28.4 ± 5.8% (n = 2) of the radioactivity after 2 h. This loss was then followed by a plateau as (89) Zr remains stable in the cells. [(64) Cu]-WBCs showed a loss of 85 ± 6% (n = 3) of the radioactivity after 1 h, which increased to 96 ± 6% (n = 3) loss after 3 h. WBC labelling with [(89) Zr]-loaded CN showed a fast kinetic of leukocyte association, high labelling efficiency and a relatively good retention of the radioactivity. This method using (89) Zr has a potential application for PET imaging of inflammation.
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Affiliation(s)
| | - C. Prenant
- Wolfson Molecular Imaging CentreManchesterUK
| | - B. Ellis
- NHS Foundation TrustCentral Manchester University HospitalManchesterUK
| | - H. Boutin
- Wolfson Molecular Imaging CentreManchesterUK
| | - A. McMahon
- Wolfson Molecular Imaging CentreManchesterUK
| | - G. Brown
- Wolfson Molecular Imaging CentreManchesterUK
| | - P. Locatelli
- Materials Science BuildingUniversity of ManchesterManchesterUK
| | - A.K.P. Jones
- Clinical Sciences BuildingSalford Royal NHS Foundation TrustManchesterUK
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Abstract
We developed a visual field simulator for teaching perimetry on a Goldmann-type perimeter. It can present reproducible normal and defective visual fields, is portable and can be used without being attached to the perimeter, and will provide an easier way to train individuals in the correct techniques of perimetry.
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Drance SM, Susanna R, Fairclough M. [Early defects in the visual field in glaucoma (author's transl)]. Klin Monbl Augenheilkd 1978; 173:519-23. [PMID: 732167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This study shows that the field defects in simple glaucoma can occur as paracentral scotoma (77%) as well as nasal skip defects (20%) in the central or peripheral field. Also a combination (54%) of both defects is already possible at the start. This points out that more than one nerve bundle can be affected either simultaneously or one shortly after the other. It was also remarkable that by Drance's modification of Armaly's method for two eyes a typical nasal skip and/or a paracentral scotoma with temporal visual field defect occurred as the first sign.
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Drance SM, Fairclough M, Butler DM, Kottler MS. The importance of disc hemorrhage in the prognosis of chronic open angle glaucoma. Arch Ophthalmol 1977; 95:226-8. [PMID: 836207 DOI: 10.1001/archopht.1977.04450020028004] [Citation(s) in RCA: 153] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The progression of field damage of 48 eyes with chronic simple glaucoma and a splinter hemorrhage on the disc was compared with that of 48 chronic simple glaucoma eyes without hemorrhage. The incidence of visual field progression was substantially higher among those with a hemorrhage. Similar visual field progression was substantially higher in 29 eyes with elevated introcular pressure and a disc hemorrhage when compared with 29 ocular hypertensive patients with no hemorrhage. The prognostic importance of a disc hemorrhage is discussed.
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