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Influence of compos...
Influence of composition of cysteine-containing peptide-based chelators on biodistribution of Tc-99m-labeled anti-EGFR affibody molecules
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- Oroujeni, Maryam, PhD, 1982- (author)
- Uppsala universitet,Medicinsk strålningsvetenskap
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- Andersson, Ken G. (author)
- Uppsala universitet,Medicinsk strålningsvetenskap
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- Steinhardt, Xenia (author)
- KTH,Proteinvetenskap,KTH Royal Inst Technol, Dept Prot Sci, Stockholm, Sweden.
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- Altai, Mohamed (author)
- Uppsala universitet,Medicinsk strålningsvetenskap
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- Orlova, Anna, 1960- (author)
- Uppsala universitet,Theranostics
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- Mitran, Bogdan (author)
- Uppsala universitet,Theranostics
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- Vorobyeva, Anzhelika (author)
- Uppsala universitet,Medicinsk strålningsvetenskap
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- Garousi, Javad (author)
- Uppsala universitet,Medicinsk strålningsvetenskap
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- Tolmachev, Vladimir (author)
- Uppsala universitet,Medicinsk strålningsvetenskap
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- Löfblom, John (author)
- KTH,Proteinvetenskap,KTH Royal Inst Technol, Dept Prot Sci, Stockholm, Sweden.
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(creator_code:org_t)
- 2018-05-04
- 2018
- English.
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In: Amino Acids. - : Springer. - 0939-4451 .- 1438-2199. ; 50:8, s. 981-994
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https://doi.org/10.1...
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Abstract
Subject headings
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- Epidermal growth factor receptor (EGFR) is overexpressed in a number of cancers and is the molecular target for several anti-cancer therapeutics. Radionuclide molecular imaging of EGFR expression should enable personalization of anti-cancer treatment. Affibody molecule is a promising type of high-affinity imaging probes based on a non-immunoglobulin scaffold. A series of derivatives of the anti-EGFR affibody molecule ZEGFR:2377, having peptide-based cysteine-containing chelators for conjugation of Tc-99m, was designed and evaluated. It was found that glutamate-containing chelators Gly-Gly-Glu-Cys (GGEC), Gly-Glu-Glu-Cys (GEEC) and Glu-Glu-Glu-Cys (EEEC) provide the best labeling stability. The glutamate containing conjugates bound to EGFR-expressing cells specifically and with high affinity. Specific targeting of EGFR-expressing xenografts in mice was demonstrated. The number of glutamate residues in the chelator had strong influence on biodistribution of radiolabeled affibody molecules. Increase of glutamate content was associated with lower uptake in normal tissues. The Tc-99m-labeled variant containing the EEEC chelator provided the highest tumor-to-organ ratios. In conclusion, optimizing the composition of peptide-based chelators enhances contrast of imaging of EGFR-expression using affibody molecules.
Subject headings
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Läkemedelskemi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medicinal Chemistry (hsv//eng)
Keyword
- Affibody molecules
- EGFR
- Tc-99m
- Peptide-based chelators
- Glutamate
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Oroujeni, Maryam ...
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Andersson, Ken G ...
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Steinhardt, Xeni ...
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Altai, Mohamed
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Orlova, Anna, 19 ...
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Mitran, Bogdan
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Vorobyeva, Anzhe ...
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Garousi, Javad
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Tolmachev, Vladi ...
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Löfblom, John
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Biochemistry and ...
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Cell and Molecul ...
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Basic Medicine
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and Medicinal Chemis ...
- Articles in the publication
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Amino Acids
- By the university
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Royal Institute of Technology
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Uppsala University