201. Effects of n-6 and n-3 polyunsaturated acid-rich soybean phosphatidylcholine on membrane lipid profile and cryotolerance of human sperm.
- Author
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Vireque AA, Tata A, Silva OF, LoTurco EG, Azzolini A, Ferreira CR, Dantas MH, Ferriani RA, and Reis RM
- Subjects
- Cell Membrane metabolism, Cell Membrane ultrastructure, Cell Survival drug effects, Cryoprotective Agents isolation & purification, Egg Yolk chemistry, Fatty Acids, Omega-3 isolation & purification, Fatty Acids, Omega-6 isolation & purification, Humans, Kinetics, Male, Micelles, Microscopy, Electron, Scanning, Phosphatidylcholines isolation & purification, Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization, Sperm Motility drug effects, Spermatozoa metabolism, Spermatozoa ultrastructure, Sphingomyelins isolation & purification, Sphingomyelins pharmacology, Cell Membrane drug effects, Cold Temperature adverse effects, Cryopreservation methods, Cryoprotective Agents pharmacology, Fatty Acids, Omega-3 pharmacology, Fatty Acids, Omega-6 pharmacology, Membrane Lipids metabolism, Phosphatidylcholines pharmacology, Glycine max chemistry, Spermatozoa drug effects
- Abstract
Objective: To study the effects of n-6 and n-3 polyunsaturated acid-rich soybean phosphatidylcholine (soy-PC) on sperm cryotolerance with regard to sperm membrane lipid profile, membrane surface integrity, and routine semen parameters., Design: Experimental study., Setting: University-affiliated tertiary hospital., Patient(s): A total of 20 normospermic fertile men., Intervention(s): Semen samples examined for differences in semen parameters, sperm membrane lipid profile, and plasma membrane surface both before and after cryopreservation using basic freezing medium with N-tris(hydroxymethyl)-methyl-2-aminoethane sulfonic acid (TES) and tris-(hydroxymethyl)-aminomethane (TRIS) supplemented with purified soy-PC (TEST-PC) or egg yolk (TEST-Y), both alone or in association (TEST-Y-PC)., Main Outcome Measure(s): Conventional semen parameters and membrane lipid profile by matrix-assisted laser/desorption ionization mass spectrometry (MALDI-MS)., Result(s): Postthaw sperm cell motility, vitality, and morphology parameters were similar for soy-PC (TEST-PC) and egg yolk (TEST-Y) cryoprotectants. However, sperm exposed to TEST-Y-PC presented better kinetic parameters, which were similar to the original quality of the fresh semen. Human sperm MALDI-MS lipid profiles revealed that the relative abundance of glycerophospholipids of m/z 760.44 [PC (34:1)+H]+, 781.55 [SM (20:0) +Na]+, 784.55 [PC (36:3) +H]+, 806.64 [PC (38:6) +H]+, 807.64 [SM (22:1) +Na]+, and 809.64 [SM (22:0) +Na]+ increased in soy-PC samples (TEST-PC). Nonetheless, only one lipid (m/z 781.55, [SM (20:0) +Na]+) statistically significantly changed when sperm was cryopreserved in TEST-Y-PC., Conclusion(s): Sphingomyelin was defined as a prospective biomarker of soy-PC treatment, and it could be related to the positive cryoprotective effects of soy-PC in human sperm, opening new perspectives to design of a more efficient synthetic cryoprotectant medium containing purified egg yolk biomolecules combined with soy-PC., (Copyright © 2016 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.)
- Published
- 2016
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