PET imaging of antisense oligonucleotide distribution in rat and nonhuman primate brains using click chemistry
Rattachement africain : us, se, gb. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Determination of a drug’s biodistribution is critical to ensure that it reaches the target tissue of interest. This is particularly challenging in the brain, where invasive sampling methods may not be possible. Here, we present a pretargeted positron emission tomography (PET) imaging methodology that uses bioorthogonal click chemistry to determine the distribution of an antisense oligonucleotide (ASO) in the brains of rats and nonhuman primates after intrathecal dosing of ASO. A PET tracer, [ 18 F]BIO-687, bearing a click-reactive trans -cyclooctene was developed and tested in conjunction with a test Malat1 ASO conjugated with a methyltetrazine group. PET imaging in rats demonstrated that the tracer had good kinetic properties for PET imaging in the rodent central nervous system and could react to form a covalent linkage with high specificity to the methyltetrazine-conjugated ASO in vivo. Furthermore, the amount of PET tracer reacted by cycloaddition with the methyltetrazine was determined to be dependent on the concentration of ASO-methyltetrazine in rat brain tissue, as determined by comparing the PET imaging signal with the liquid chromatography–mass spectrometry signal in the tissue homogenates. The approach was evaluated in cynomolgus macaques using both the Malat1 test ASO and a candidate therapeutic ASO, BIIB080, targeting the microtubule-associated protein tau ( MAPT ) gene. PET imaging showed favorable tracer kinetics and specific binding to both ASOs in nonhuman primate (NHP) brain in vivo. These results suggest that the PET imaging tracer [ 18 F]BIO-687 could show the distribution of intrathecally delivered ASOs in the rat and NHP brains.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- PET imaging of antisense oligonucleotide distribution in rat and nonhuman primate brains using click chemistry
- Date Crossref
- 07/05/2025
- Éditeur
- American Association for the Advancement of Science (AAAS)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Biogen (United States) pays non établi dans la noticeEntreprise
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Region Stockholm pays non établi dans la noticeOrganisme public
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Karolinska Institutet pays non établi dans la noticeUniversité ou école supérieure
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Invicro (United Kingdom) pays non établi dans la noticeEntreprise
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Ionis Pharmaceuticals (United States) pays non établi dans la noticeEntreprise
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Department of Clinical Neuroscience pays non établi dans la noticeÉtablissement de santé
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Ionis Pharmaceuticals Inc. pays non établi dans la noticeEntreprise
Biogen (United States), Region Stockholm et Karolinska Institutet, avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.