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- W2113192512 abstract "The effect of co-incubating human spermatozoa with 8 mmol/L dilauroylphosphatidylcholine (PC12) liposomes containing 6 mmol/L adenosine 5′-triphosphate (LATP) was assessed by CASA and compared to that obtained with blank PC12 liposomes (LB). The aim of this study was to investigate if such treatments can improve sperm movement and sustain sperm motility over time. Significant and similar increases in straight-line velocity and linearity of sperm movement in B2 capacitating medium (both p<0.01) were obtained with LB and LATP treatments (final concentration: 0.38 mmol/L PC12 and 0.5 mmol/L ATP) while in Tyrode's medium supplemented with 10 mg/mL BSA, these movement parameters were increased significantly only in sperm aliquots treated with LATP. Furthermore, after incubation for 0.5 h in Tyrode's, a bioluminescence assay of intracellular ATP indicated no significant change in ATP concentration for LATP-treated spermatozoa while the ATP content of control and LB-treated spermatozoa decreased significantly during the same period (both p<0.05). The effect of liposomes on the acrosome reaction was also investigated jointly with CASA. These experiments were performed by fluorescence microscopy, using PSA-FITC and the supravital stain Hoechst 33258. After a precapacitation period of 3 h in BWW medium the spermatozoa were incubated for 1 h with LATP, LB, LB + free ATP and free ATP alone (final concentration 0.5 mmol/L ATP). Under these conditions the percentage of acrosome-reacted spermatozoa was increased similarly after LATP and LB treatments compared to control (respectively from 4.9 to 12%, p<0.01 and 4.9 to 11.3%, p<0.05) but the percentage of true acrosome-reacted spermatozoa, and the values for all movement characteristics (except percentage motility) were increased significantly only with LATP treatment. The results indicate the potential of PC12 vesicles for introducing highly hydrophilic compounds into spermatozoa, as well as for modulating membrane structures and functions required for fertilization." @default.
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- W2113192512 date "1995-12-01" @default.
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- W2113192512 title "Stimulation of movement and acrosome reaction of human spermatozoa by PC12 liposomes encapsulating ATP" @default.
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- W2113192512 doi "https://doi.org/10.1111/j.1365-2605.1995.tb00564.x" @default.
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