- 1Laboratoire PROTEE, EA – Université de Toulon, Toulon-La Garde 83957, FRANCE
- 2Inserm U927, Ischémie-reperfusion en transplantation rénale, Poitiers, FRANCE
- 3Laboratoire Velay, Puy en Velay, FRANCE
- 4UF Biosanté, Faculté des Sciences Fondamentales et Appliquées, 40 rue du recteur Pineau, Poitiers Cedex 86022, Université de Poitiers, FRANCE
Can J Biotech, Volume 2, Issue 3, Pages 116-123, DOI: https://doi.org/10.24870/cjb.2018-000123
Received: Jul 18, 2018; Revised: Oct 1, 2018; Accepted: Oct 10, 2018
Background: Herbal plant extracts are a more common alternative to conventional medicine to treat sleep disorders and intermittent hypoxia. Notably, obstructive sleep apnea causes injuries similar to those observed in models of ischemia-reperfusion including the decrease of nitric oxide (NO) availability. Kidney transplantation in end-stage renal disease reverses the sleep apnea. The underlying mechanism linking hypoxia, sleep apnea, and renal protection remains to be defined at the cellular level.
Objective: The aim of this study was to demonstrate the safety and efficacy of herbal plant infusions with a potential for donating NO, to attenuation of damage induced during a hypoxia/reperfusion sequence, on kidney epithelial cells LLC-PK1.
Materials and Methods: Cell death (Lactate Dehydrogenase release assay) and a viability test (MTS assay) after 24 h of incubation with different concentrations of plant infusion were assessed using the LLC-PK1 cell line. Then, measurement of the breakdown product of NO (the NaNO2) and LDH assay were carried out after 24 h of hypoxia, followed by 4 h or 24 h of reperfusion.
Results: The effect of different dilutions of herbal plant infusion on the LLC-PK1 cell viability, after 24 h of incubation, was maximal at a 30% dilution compared to control. After 24 h of hypoxia, there was an increase of NaNO2 and thus of NO, and a concentration-dependent decrease of cell death. Similar results were observed after hypoxia followed by 4 h of reperfusion. These effects were always maximal at 50% dilution of plants infusion.
Conclusion: Safe infusion of plant extracts causes a dose-dependent increase of NO and has a protective effect against the cellular stress caused by hypoxia and reoxygenation. Since it has been demonstrated that there is a NO-dependent mechanism allowing the reduction of injuries induced by ischemia/reoxygenation process, such a mechanism could be responsible for our observations.
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