Stapled peptides as scaffolds for developing radiotracers for intracellular targets: Preliminary evaluation of a radioiodinated MDM2-binding stapled peptide in the SJSA-1 osteosarcoma model.
MDM2
Radioiodine
SJSA-1
Stapled peptide
VIP116
Journal
Bioorganic & medicinal chemistry letters
ISSN: 1464-3405
Titre abrégé: Bioorg Med Chem Lett
Pays: England
ID NLM: 9107377
Informations de publication
Date de publication:
15 06 2022
15 06 2022
Historique:
received:
09
03
2022
revised:
04
04
2022
accepted:
06
04
2022
pubmed:
19
4
2022
medline:
4
5
2022
entrez:
18
4
2022
Statut:
ppublish
Résumé
Stapled peptides are promising scaffolds for inhibiting protein-protein interactions in cells, including between the intracellular oncoprotein MDM2 and p53. Herein, we have investigated the potential utility of a stapled peptide, VIP116, for developing radiolabeled agents targeting MDM2. VIP116 was radioiodinated using the prosthetic agent N-succinimidyl-3-[*I]iodobenzoate ([*I]SIB). The resulting labeled peptide [*I]SIB-VIP116 exhibited high uptake (165.3 ± 27.7%/mg protein) and specificity in SJSA-1 tumor cells. Tissue distribution studies of [*I]SIB-VIP116 revealed a peak tumor uptake of 2.19 ± 0.56 percent injected dose per gram (%ID/g) in SJSA-1 xenografts at 2 h post-injection, which was stable until 6 h. [*I]SIB-VIP116 exhibited high activity (8.33 ± 1.18%ID/g) in the blood pool but had high tumor-to-muscle ratios (12.0 ± 5.7), at 30 min. Metabolic stability studies in mice indicated that about 80% of the activity in plasma was intact [*I]SIB-VIP116 at 4 h. Our results confirm the cell permeability and specific binding of [*I]SIB-VIP116 to MDM2 and the suitability of the VIP116 scaffold for radiolabeled probe development.
Identifiants
pubmed: 35436588
pii: S0960-894X(22)00201-3
doi: 10.1016/j.bmcl.2022.128725
pmc: PMC9940446
mid: NIHMS1871000
pii:
doi:
Substances chimiques
Peptides
0
MDM2 protein, human
EC 2.3.2.27
Proto-Oncogene Proteins c-mdm2
EC 2.3.2.27
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
128725Subventions
Organisme : NCI NIH HHS
ID : R21 CA241823
Pays : United States
Informations de copyright
Copyright © 2022 Elsevier Ltd. All rights reserved.
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