Selective detection of phospholipids using molecularly imprinted fluorescent sensory core-shell particles.
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
18 06 2020
18 06 2020
Historique:
received:
09
03
2020
accepted:
28
05
2020
entrez:
20
6
2020
pubmed:
20
6
2020
medline:
15
12
2020
Statut:
epublish
Résumé
Sphingosine-1-phosphate (S1P) is a bioactive sphingo-lipid with a broad range of activities coupled to its role in G-protein coupled receptor signalling. Monitoring of both intra and extra cellular levels of this lipid is challenging due to its low abundance and lack of robust affinity assays or sensors. We here report on fluorescent sensory core-shell molecularly imprinted polymer (MIP) particles responsive to near physiologically relevant levels of S1P and the S1P receptor modulator fingolimod phosphate (FP) in spiked human serum samples. Imprinting was achieved using the tetrabutylammonium (TBA) salt of FP or phosphatidic acid (DPPA·Na) as templates in combination with a polymerizable nitrobenzoxadiazole (NBD)-urea monomer with the dual role of capturing the phospho-anion and signalling its presence. The monomers were grafted from ca 300 nm RAFT-modified silica core particles using ethyleneglycol dimethacrylate (EGDMA) as crosslinker resulting in 10-20 nm thick shells displaying selective fluorescence response to the targeted lipids S1P and DPPA in aqueous buffered media. Potential use of the sensory particles for monitoring S1P in serum was demonstrated on spiked serum samples, proving a linear range of 18-60 µM and a detection limit of 5.6 µM, a value in the same range as the plasma concentration of the biomarker.
Identifiants
pubmed: 32555511
doi: 10.1038/s41598-020-66802-3
pii: 10.1038/s41598-020-66802-3
pmc: PMC7303128
doi:
Substances chimiques
Lysophospholipids
0
Polymers
0
sphingosine 1-phosphate
26993-30-6
Silicon Dioxide
7631-86-9
Fingolimod Hydrochloride
G926EC510T
Sphingosine
NGZ37HRE42
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
9924Références
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