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Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles

Reactive microgliosis is a pathological hallmark that accompanies neuronal demise in many neurodegenerative diseases, ranging from acute brain/spinal cord injuries to chronic diseases, such as amyotrophic lateral sclerosis (ALS), Alzheimer’s disease (AD) and age-related dementia. One strategy to ass...

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Autores principales: Auriemma, Renato, Sponchioni, Mattia, Capasso Palmiero, Umberto, Rossino, Giacomo, Rossetti, Arianna, Marsala, Andrea, Collina, Simona, Sacchetti, Alessandro, Moscatelli, Davide, Peviani, Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308144/
https://www.ncbi.nlm.nih.gov/pubmed/34203263
http://dx.doi.org/10.3390/nano11071693
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author Auriemma, Renato
Sponchioni, Mattia
Capasso Palmiero, Umberto
Rossino, Giacomo
Rossetti, Arianna
Marsala, Andrea
Collina, Simona
Sacchetti, Alessandro
Moscatelli, Davide
Peviani, Marco
author_facet Auriemma, Renato
Sponchioni, Mattia
Capasso Palmiero, Umberto
Rossino, Giacomo
Rossetti, Arianna
Marsala, Andrea
Collina, Simona
Sacchetti, Alessandro
Moscatelli, Davide
Peviani, Marco
author_sort Auriemma, Renato
collection PubMed
description Reactive microgliosis is a pathological hallmark that accompanies neuronal demise in many neurodegenerative diseases, ranging from acute brain/spinal cord injuries to chronic diseases, such as amyotrophic lateral sclerosis (ALS), Alzheimer’s disease (AD) and age-related dementia. One strategy to assess and monitor microgliosis is to use positron emission tomography (PET) by exploiting radioligands selective for the 18 kDa translocator protein (TSPO) which is highly upregulated in the brain in pathological conditions. Several TSPO ligands have been developed and validated, so far. Among these, PBR28 has been widely adopted for PET imaging at both preclinical and clinical levels, thanks to its high brain penetration and high selectivity. For this reason, PBR28 represents a good candidate for functionalization strategies, where this ligand could be exploited to drive selective targeting of TSPO-expressing cells. Since the PBR28 structure lacks functional moieties that could be exploited for derivatization, in this work we explored a synthetic pathway for the synthesis of a PBR28 derivative carrying an alkyne group (PBR-alkyne), enabling the fast conjugation of the ligand through azide-alkyne cycloaddition, also known as click-chemistry. As a proof of concept, we demonstrated in silico that the derivatized PBR28 ligand maintains the capability to fit into the TSPO binding pocked, and we successfully exploited PBR-alkyne to decorate zwitterionic biodegradable polymer nanoparticles (NPs) resulting in efficient internalization in cultured microglia-like cell lines.
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spelling pubmed-83081442021-07-25 Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles Auriemma, Renato Sponchioni, Mattia Capasso Palmiero, Umberto Rossino, Giacomo Rossetti, Arianna Marsala, Andrea Collina, Simona Sacchetti, Alessandro Moscatelli, Davide Peviani, Marco Nanomaterials (Basel) Article Reactive microgliosis is a pathological hallmark that accompanies neuronal demise in many neurodegenerative diseases, ranging from acute brain/spinal cord injuries to chronic diseases, such as amyotrophic lateral sclerosis (ALS), Alzheimer’s disease (AD) and age-related dementia. One strategy to assess and monitor microgliosis is to use positron emission tomography (PET) by exploiting radioligands selective for the 18 kDa translocator protein (TSPO) which is highly upregulated in the brain in pathological conditions. Several TSPO ligands have been developed and validated, so far. Among these, PBR28 has been widely adopted for PET imaging at both preclinical and clinical levels, thanks to its high brain penetration and high selectivity. For this reason, PBR28 represents a good candidate for functionalization strategies, where this ligand could be exploited to drive selective targeting of TSPO-expressing cells. Since the PBR28 structure lacks functional moieties that could be exploited for derivatization, in this work we explored a synthetic pathway for the synthesis of a PBR28 derivative carrying an alkyne group (PBR-alkyne), enabling the fast conjugation of the ligand through azide-alkyne cycloaddition, also known as click-chemistry. As a proof of concept, we demonstrated in silico that the derivatized PBR28 ligand maintains the capability to fit into the TSPO binding pocked, and we successfully exploited PBR-alkyne to decorate zwitterionic biodegradable polymer nanoparticles (NPs) resulting in efficient internalization in cultured microglia-like cell lines. MDPI 2021-06-28 /pmc/articles/PMC8308144/ /pubmed/34203263 http://dx.doi.org/10.3390/nano11071693 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Auriemma, Renato
Sponchioni, Mattia
Capasso Palmiero, Umberto
Rossino, Giacomo
Rossetti, Arianna
Marsala, Andrea
Collina, Simona
Sacchetti, Alessandro
Moscatelli, Davide
Peviani, Marco
Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles
title Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles
title_full Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles
title_fullStr Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles
title_full_unstemmed Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles
title_short Synthesis and Characterization of a “Clickable” PBR28 TSPO-Selective Ligand Derivative Suitable for the Functionalization of Biodegradable Polymer Nanoparticles
title_sort synthesis and characterization of a “clickable” pbr28 tspo-selective ligand derivative suitable for the functionalization of biodegradable polymer nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8308144/
https://www.ncbi.nlm.nih.gov/pubmed/34203263
http://dx.doi.org/10.3390/nano11071693
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