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Article

Increased Antioxidant Capacity and Pro-Homeostatic Lipid Mediators in Ocular Hypertension—A Human Experimental Model

1
Department of Drug Design and Pharmacology, University of Copenhagen, 2100 Copenhagen, Denmark
2
Neuroscience Center of Excellence, Louisiana State University Health New Orleans, New Orleans, LA 70112, USA
3
Department of Veterinary and Animal Sciences, University of Copenhagen, 2000 Frederiksberg, Denmark
4
Department of Ophthalmology, Copenhagen University Hospital, Rigshospitalet-Glostrup, 2600 Glostrup, Denmark
*
Authors to whom correspondence should be addressed.
Authors contributed equally to this work.
J. Clin. Med. 2020, 9(9), 2979; https://doi.org/10.3390/jcm9092979
Received: 21 August 2020 / Revised: 10 September 2020 / Accepted: 10 September 2020 / Published: 15 September 2020
(This article belongs to the Section Clinical Cytology)
The main risk factor for primary open-angle glaucoma (POAG) is increased intraocular pressure (IOP). It is of interest that about half of the patients have an IOP within the normal range (normal-tension glaucoma, NTG). Additionally, there is a group of patients with a high IOP but no glaucomatous neurodegeneration (ocular hypertension, OHT). Therefore, risk factors other than IOP are involved in the pathogenesis of glaucoma. Since the retina has a very high oxygen-demand, decreased autoregulation and a fluctuating oxygen supply to the retina have been linked to glaucomatous neurodegeneration. To assess the significance of these mechanisms, we have utilized a human experimental model, in which we stress participants with a fluctuating oxygen supply. Levels of oxidative stress molecules, antioxidants, and lipid mediators were measured in the plasma. Patients with NTG, OHT, and control subjects were found to have similar levels of oxidative stress markers. In contrast, patients with OHT had a higher level of total antioxidant capacity (TAC) and pro-homeostatic lipid mediators. Thus, we suggest that OHT patients manage fluctuating oxygen levels more efficiently and, thus, are less susceptible to glaucomatous neurodegenerations, due to enhanced systemic antioxidant protection. View Full-Text
Keywords: antioxidant capacity; oxidative stress; normal-tension glaucoma; ocular hypertension; hypoxia; lipidomics; pro-homeostatic lipid mediators; hydroxyeicosatetraenoic acids; hydroxydocosahexaenoic acids antioxidant capacity; oxidative stress; normal-tension glaucoma; ocular hypertension; hypoxia; lipidomics; pro-homeostatic lipid mediators; hydroxyeicosatetraenoic acids; hydroxydocosahexaenoic acids
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MDPI and ACS Style

Langbøl, M.; Saruhanian, S.; Baskaran, T.; Tiedemann, D.; Mouhammad, Z.A.; Toft-Kehler, A.K.; Jun, B.; Vohra, R.; Bazan, N.G.; Kolko, M. Increased Antioxidant Capacity and Pro-Homeostatic Lipid Mediators in Ocular Hypertension—A Human Experimental Model. J. Clin. Med. 2020, 9, 2979. https://doi.org/10.3390/jcm9092979

AMA Style

Langbøl M, Saruhanian S, Baskaran T, Tiedemann D, Mouhammad ZA, Toft-Kehler AK, Jun B, Vohra R, Bazan NG, Kolko M. Increased Antioxidant Capacity and Pro-Homeostatic Lipid Mediators in Ocular Hypertension—A Human Experimental Model. Journal of Clinical Medicine. 2020; 9(9):2979. https://doi.org/10.3390/jcm9092979

Chicago/Turabian Style

Langbøl, Mia, Sarkis Saruhanian, Thisayini Baskaran, Daniel Tiedemann, Zaynab A. Mouhammad, Anne K. Toft-Kehler, Bokkyoo Jun, Rupali Vohra, Nicolas G. Bazan, and Miriam Kolko. 2020. "Increased Antioxidant Capacity and Pro-Homeostatic Lipid Mediators in Ocular Hypertension—A Human Experimental Model" Journal of Clinical Medicine 9, no. 9: 2979. https://doi.org/10.3390/jcm9092979

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