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Determination of the main phase transition temperature of phospholipids by nanoplasmonic sensing
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SYSNO ASEP 0494894 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Determination of the main phase transition temperature of phospholipids by nanoplasmonic sensing Author(s) Chen, W. (FI)
Duša, Filip (UIACH-O) RID, ORCID
Witos, J. (FI)
Ruokonen, S. K. (FI)
Wiedmer, S. K. (FI)Number of authors 5 Article number 14815 Source Title Scientific Reports. - : Nature Publishing Group - ISSN 2045-2322
Roč. 8, OCT (2018)Number of pages 11 s. Publication form Online - E Language eng - English Country GB - United Kingdom Keywords drug-delivery systems ; ionic liquids ; nanomaterials science ; biological-membranes ; liposome Subject RIV CB - Analytical Chemistry, Separation OECD category Nano-processes (applications on nano-scale) Institutional support UIACH-O - RVO:68081715 UT WOS 000446325500027 EID SCOPUS 85054446384 DOI 10.1038/s41598-018-33107-5 Annotation Our study demonstrates that nanoplasmonic sensing (NPS) can be utilized for the determination of the phase transition temperature (T-m) of phospholipids. During the phase transition, the lipid bilayer undergoes a conformational change. Therefore, it is presumed that the T-m of phospholipids can be determined by detecting conformational changes in liposomes. The studied lipids included 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), and 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC). Liposomes in gel phase are immobilized onto silicon dioxide sensors and the sensor cell temperature is increased until passing the T-m of the lipid. The results show that, when the system temperature approaches the T-m, a drop of the NPS signal is observed. The breakpoints in the temperatures are 22.5 degrees C, 41.0 degrees C, and 55.5 degrees C for DMPC, DPPC, and DSPC, respectively. These values are very close to the theoretical T-m values, i.e., 24 degrees C, 41.4 degrees C, and 55 degrees C for DMPC, DPPC, and DSPC, respectively. Our studies prove that the NPS methodology is a simple and valuable tool for the determination of the T-m of phospholipids. Workplace Institute of Analytical Chemistry Contact Iveta Drobníková, drobnikova@iach.cz, Tel.: 532 290 234 Year of Publishing 2019
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