Melatonin Levels in Patients With Primary Open-angle Glaucoma With High or Low Intraocular Pressure.

Abstract:

PURPOSE:To evaluate circulatory melatonin levels by assessing nocturnal urinary excretion of 6-sulfatoxymelatonin (aMT6s) in patients with primary open-angle glaucoma (POAG) and to compare the high-tension group and the low-tension group. METHODS:This study included 80 eyes of 41 POAG patients and 87 eyes of 44 control subjects. POAG group was further classified into high-tension group and low-tension group according to the pretreatment intraocular pressure (IOP). The first urine in the morning was collected and aMT6s were measured using a commercial ELISA kit. Urinary aMT6s levels were expressed as ng aMT6s/mg creatinine. Differences in melatonin levels among the control and POAG subgroups were evaluated by generalized estimating equation adjusting age, sex, sleep duration, and intereye correlation. RESULTS:Urinary aMT6s/creatinine ratio did not differ between POAG and control group (P=0.097). The difference in the aMT6s/creatinine ratio between the 3 groups-high-tension group with baseline IOP≥21 mm Hg (19.74±3.12 ng/mg), low-tension glaucoma group with baseline IOP<21 mm Hg (26.71±3.47 ng/mg), and control group (30.35±3.05 ng/mg)-was statistically significant (P=0.046). Post hoc analysis revealed that the difference between the control and high-tension glaucoma groups was significant (P=0.014), whereas the difference between the control and low-tension glaucoma groups was not (P=0.436). CONCLUSIONS:This study found low melatonin levels in high-tension glaucoma compared with the control.

journal_name

J Glaucoma

journal_title

Journal of glaucoma

authors

Kim JY,Jeong AR,Chin HS,Kim NR

doi

10.1097/IJG.0000000000001130

subject

Has Abstract

pub_date

2019-02-01 00:00:00

pages

154-160

issue

2

eissn

1057-0829

issn

1536-481X

journal_volume

28

pub_type

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