Development of a Versatile High-through-put Oligonucleotide LC-MS Method to Accelerate Drug Discovery.
Animals
Rats
Chromatography, Liquid
/ methods
Tandem Mass Spectrometry
/ methods
Drug Discovery
/ methods
Oligonucleotides, Antisense
/ administration & dosage
Liquid-Liquid Extraction
/ methods
Oligonucleotides
High-Throughput Screening Assays
/ methods
RNA, Long Noncoding
Liquid Chromatography-Mass Spectrometry
LC–MS
crosstalk-free internal standard
high-through-put
oligonucleotide (Oligo)
sensitivity improvement
Journal
AAPS PharmSciTech
ISSN: 1530-9932
Titre abrégé: AAPS PharmSciTech
Pays: United States
ID NLM: 100960111
Informations de publication
Date de publication:
10 Oct 2024
10 Oct 2024
Historique:
received:
01
07
2024
accepted:
03
09
2024
medline:
11
10
2024
pubmed:
11
10
2024
entrez:
10
10
2024
Statut:
epublish
Résumé
Liquid chromatography-mass spectrometry (LC-MS) is an effective tool for high-throughput quantification of oligonucleotides that is crucial for understanding their biological roles and developing diagnostic tests. This paper presents a high-throughput LC-MS/MS method that may be versatilely applied for a wide range of oligonucleotides, making it a valuable tool for rapid screening and discovery. The method is demonstrated using an in-house synthesized MALAT-1 Antisense oligonucleotide (ASO) as a test case. Biological samples were purified using a reversed liquid-liquid extraction process automated by a liquid handling workstation and analyzed with ion-pairing LC-MS/MS. The assay was evaluated for sensitivity (LLOQ = 2 nM), specificity, precision, accuracy, recovery, matrix effect, and stability in rat cerebrospinal fluid (CSF) and plasma. Besides some existing considerations such as column selection, ion-pairing reagent, and sample purification, our work focused on the following four subtopics: 1) selecting the appropriate Multiple Reaction Monitoring (MRM) transition to maximize sensitivity for trace-level ASO in biological samples; 2) utilizing a generic risk-free internal standard (tenofovir) to avoid crosstalk interference from the oligo internal standard commonly utilized in the LC-MS assay; 3) automating the sample preparation process to increase precision and throughput; and 4) comparing liquid-liquid extraction (LLE) and solid-phase extraction (SPE) as sample purification methods in oligo method development. The study quantified the concentration of MALAT-1 ASO in rat CSF and plasma after intrathecal injection and used the difference between the two matrices to evaluate the injection technique. The results provide a solid foundation for further internal oligonucleotide discovery and development.
Identifiants
pubmed: 39390148
doi: 10.1208/s12249-024-02934-3
pii: 10.1208/s12249-024-02934-3
doi:
Substances chimiques
Oligonucleotides, Antisense
0
Oligonucleotides
0
RNA, Long Noncoding
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
239Informations de copyright
© 2024. Merck & Co., Inc., Rahway, NJ, USA and its affiliates, under exclusive licence to American Association of Pharmaceutical Scientists.
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