Abstract
Background: Liposomes continue to play an important role in drug delivery research due to their ability to improve transport and targeting of a wide range of active molecules. Analysis of liposomal components is a key point in the characterization and evaluation of formulation stability. The aim of this work was to develop and validate an HPLC-ELSD method for the characterization and quality control of liposomes.
Methods: HPLC-ELSD method was validated by assessing selectivity, linearity, precision, accuracy, limit of detection and quantitation. The mobile phase consisted of a 0.1% (v/v) of trifluoroacetic acid (TFA) and methanol in gradient elution. Initial rate was 20:80 (0.1% TFA: methanol), with a ramp reaching 100% methanol. HPLC-MS/MS was used to confirm the presence of the fatty acid mixture in the analyzed lipids, as well as sub-products generated under pre-determined conditions in the stability study.
Results: A HPLC-ELSD method has been developed to detect and measure cholesterol, phosphatidylcholine and lysophosphatidylcholine. High specificity, sensitivity and linearity within the predetermined range for all the compounds analyzed (R2>0.99) were obtained. Accuracy and precision results for all the compounds were within the acceptance limit of ≤5% and 90-110%, respectively. Mass spectrometry results showed complementary information about the phospholipid composition to evaluate the degree of degradation of liposomes over different storage conditions.
Conclusion: The method was successfully applied as a quality control tool for the analysis of a wide range of lipids, present in liposomal formulations. HPLC-MS/MS was used to ensure complete elucidation of the lipid components and the detected lyso-forms.
Keywords: HPLC-ELSD, LC-MS/MS, phospholipid, degradation, drug delivery systems, lipid-based formulation.
Graphical Abstract
[PMID: 17006053]
[http://dx.doi.org/10.3390/pharmaceutics8030029] [PMID: 27649231]
[http://dx.doi.org/10.1016/S0731-7085(02)00220-0] [PMID: 12367664]
[http://dx.doi.org/10.1081/JLC-100101491]
[PMID: 7057106]
[http://dx.doi.org/10.1194/jlr.D300040-JLR200] [PMID: 15102893]
[http://dx.doi.org/10.1016/0167-7012(93)90066-Q]
[http://dx.doi.org/10.1016/j.jpba.2009.10.001] [PMID: 19896790]
[http://dx.doi.org/10.1016/j.chroma.2005.01.072] [PMID: 15865192]
[http://dx.doi.org/10.1016/j.chroma.2004.04.051] [PMID: 15553150]
[PMID: 2086710]
[http://dx.doi.org/10.1002/jhrc.1240130210]
[http://dx.doi.org/10.1016/0378-4347(95)00576-5] [PMID: 8811429]
[http://dx.doi.org/10.1194/jlr.D200040-JLR200] [PMID: 12562857]
[http://dx.doi.org/10.1038/emm.2000.40] [PMID: 11190278]
[http://dx.doi.org/10.1016/0378-4347(93)80362-8] [PMID: 8454698]
[http://dx.doi.org/10.1016/S0021-9673(01)00988-8] [PMID: 11521886]
[http://dx.doi.org/10.1016/0021-9673(92)85556-9]
[http://dx.doi.org/10.1080/10717544.2018.1492046] [PMID: 30044149]
[http://dx.doi.org/10.1080/10611860802228350] [PMID: 18686120]
[PMID: 11893788]
[http://dx.doi.org/10.1016/S0021-9673(03)00989-0] [PMID: 12943251]
[http://dx.doi.org/10.1016/S0021-9673(01)96693-2]
[http://dx.doi.org/10.1016/j.ejpb.2005.03.001] [PMID: 15913973]
[http://dx.doi.org/10.3109/08982104.2012.668553] [PMID: 22428966]
[http://dx.doi.org/10.1080/87559129.2011.563398]
[http://dx.doi.org/10.1016/j.chroma.2014.10.010] [PMID: 25441077]
[http://dx.doi.org/10.1016/0009-3084(93)90054-7] [PMID: 8242833]
[http://dx.doi.org/10.2147/IJN.S111274] [PMID: 27843312]
[http://dx.doi.org/10.1002/jps.2600820405] [PMID: 8468678]
[http://dx.doi.org/10.3109/21691401.2014.953633] [PMID: 25222036]
[http://dx.doi.org/10.1016/0009-3084(93)90053-6] [PMID: 8242840]
[http://dx.doi.org/10.1016/j.chemphyslip.2008.07.003] [PMID: 18671956]
[http://dx.doi.org/10.1016/j.bbamem.2012.02.002]
[http://dx.doi.org/10.1016/0005-2736(89)90516-6] [PMID: 2917168]
[http://dx.doi.org/10.1016/j.ajps.2013.07.011]
[http://dx.doi.org/10.1016/j.bbamem.2005.08.007] [PMID: 16216216]
[http://dx.doi.org/10.1016/S0009-3084(99)00136-X] [PMID: 10823461]
[http://dx.doi.org/10.1515/znc-1995-7-814] [PMID: 7546044]