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Potential metabolic markers in glaucoma and their regulation in response to hypoxia
Author(s) -
Vohra Rupali,
Dalgaard Line Marie,
Vibæk Jeppe,
Langbøl Mia Aggergaard,
Bergersen Linda Hildegaard,
Olsen Niels Vidiendal,
Hassel Bjørnar,
Chaudhry Farrukh Abbas,
Kolko Miriam
Publication year - 2019
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/aos.14021
Subject(s) - hypoxia (environmental) , amino acid , medicine , venous blood , glaucoma , endocrinology , biology , chemistry , biochemistry , ophthalmology , organic chemistry , oxygen
Purpose To assess novel differences in serum levels of glucose, lactate and amino acids in patients with normal‐tension glaucoma ( NTG ) compared to age‐matched controls, at baseline and in response to universal hypoxia. Methods Twelve patients diagnosed with NTG and eleven control subjects underwent normobaric hypoxia for 2 hr. Peripheral venous blood samples were taken at baseline, during hypoxia and in the recovery phase. Serum glucose and lactate levels were measured by a blood gas analyser. Amino acids were analysed by high‐performance liquid chromatography. Results Baseline levels of lactate and total amino acids were significantly lower in patients with NTG compared to healthy controls. No differences were seen in blood glucose levels between the two groups. Lactate levels remained unchanged during hypoxia in the control group, but increased in patients with NTG . In the recovery phase, total amino acid levels were reduced in the control group, whereas no changes were found in patients with NTG . Conclusion Reduced serum levels of lactate and total amino acids were identified as potential markers for NTG . Moreover, significant differential regulatory patterns of certain amino acids were found in patients with NTG compared to control subjects. Overall, our results suggest a link between systemic energy metabolites and NTG and support a novel understanding of glaucoma as an inner retinal manifestation of a systemic condition.