Synthesis and biological evaluation of spin-labeled alkylphospholipid analogs

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Item Type:	Article
Title:	Synthesis and biological evaluation of spin-labeled alkylphospholipid analogs
Creators Name:	Mravljak, J., Zeisig, R. and Pecar, S.
Abstract:	Alkylphospholipid analogues of perifosine and miltefosine bearing a nitroxide moiety at different positions on an alkyl chain were synthesized as electron paramagnetic resonance (EPR) probes. Their amphiphilic properties were characterized by determining their critical micelle concentration (cmc) and hemolytic activity on erythrocytes both in free and liposomal form. Spin-labeled analogues as membrane components of large unilamellar liposomes containing cholesterol and dicetyl phosphate or in free solution were evaluated using the MTT assay to determine growth inhibition on MT1, MT3, and MCF7 breast cancer cell lines. 4a (IC50 = 56.4 μM) was found to be significantly more active than the perifosine against the MCF-7 cell line. Its high cmc (194.03 μM) and low hemolytic activity shows that its cytotoxic activity might be more specific; therefore, 4a can be an important molecular tool for further EPR investigations.
Keywords:	Antineoplastic Agents, Antitumor Drug Screening Assays, Cyclic N-Oxides, Hemolysis, Liposomes, Micelles, Organophosphates, Phospholipids, Phosphorylcholine, Solutions, Spin Labels, Structure-Activity Relationship, Surface-Active Agents, Tumor Cell Line
Source:	Journal of Medicinal Chemistry
ISSN:	0022-2623
Publisher:	Amer Chemical Soc
Volume:	48
Number:	20
Page Range:	6393-6399
Date:	6 October 2005
Official Publication:	https://doi.org/10.1021/jm050189v
PubMed:	View item in PubMed

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