Abstract
Purpose
To study the protection offered by empty liposomes (LPs) alone against acrolein-induced changes in urothelial cell viability and explored uptake of LPs by primary (rat) urothelial cells.
Methods
Acrolein was used as a means to induce cellular damage and reduce urothelial cellular viability. The effect of acrolein or liposomal treatment on cellular proliferation was studied using 5-bromo-2′-deoxy-uridine assay. Cytokine release was measured after urothelial cells were exposed to acrolein. Temperature-dependent uptake study was carried out for fluorescent-labeled LPs using confocal microscopy.
Results
Liposome pretreatment protected against acrolein-induced decrease in urothelial cell proliferation. LPs also significantly affected the acrolein-induced cytokine (interferon-gamma) release offering protection to the urothelial cells against acrolein damage. We also observed a temperature-dependent urothelial uptake of fluorescent-labeled LPs occurred at 37 °C (but not at 4 °C).
Conclusions
Empty LPs alone provide a therapeutic efficacy against acrolein-induced changes in urothelial cell viability and may be a promising local therapy for bladder diseases. Hence, our preliminary evidence provides support for liposome-therapy for urothelial protection and possible repair.
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Acknowledgments
This work was supported in part by NIH grants R37 DK54824 and R01 DK57284 (LAB), R01 DK083323 and a Department of Defense Grant (MBC), grants from the Urology Care Foundation Research Scholars Program and the Allergan Foundation (NJ) and the Kidney Imaging Core of the Pittsburgh Center for Kidney Research (P30-DK079307).
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The authors declare they have no conflict of interest.
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J. Nirmal and A. S. Wolf-Johnston have contributed equally to this work.
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Nirmal, J., Wolf-Johnston, A.S., Chancellor, M.B. et al. Liposomal inhibition of acrolein-induced injury in rat cultured urothelial cells. Int Urol Nephrol 46, 1947–1952 (2014). https://doi.org/10.1007/s11255-014-0745-7
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DOI: https://doi.org/10.1007/s11255-014-0745-7