Journal of Food and Nutrition Research
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Journal of Food and Nutrition Research. 2017, 5(8), 553-561
DOI: 10.12691/jfnr-5-8-4
Open AccessArticle

Amelioration of Visual Display Terminal-induced Ocular Fatigue by Aqueous Extracts of Perilla frutescens var. acuta

Jaeyong Kim1, Hakjoon Choi1, Mi-Ri Kim1, Dooi-Ri Oh1, Yujin Kim1, Huwan Kang1, Kyeong-in Jeong2, Geun-chang Ryu2, SangO Pan1 and Chul-yung Choi1,

1Jeonnam Institute of Natural Resources Research, Jangheung-gun, Jeollanamdo, South Korea

2Department of Optometry and Optic science of Dongshin University, Naju, Jeollanamdo, South Korea

Pub. Date: July 26, 2017

Cite this paper:
Jaeyong Kim, Hakjoon Choi, Mi-Ri Kim, Dooi-Ri Oh, Yujin Kim, Huwan Kang, Kyeong-in Jeong, Geun-chang Ryu, SangO Pan and Chul-yung Choi. Amelioration of Visual Display Terminal-induced Ocular Fatigue by Aqueous Extracts of Perilla frutescens var. acuta. Journal of Food and Nutrition Research. 2017; 5(8):553-561. doi: 10.12691/jfnr-5-8-4


In this study, we investigated the effects of Perilla frutescens var. acuta aqueous extract (PFA) on eyestrain using in vitro, ex vivo, and clinical tests. We confirmed the antioxidant activity of compounds present in the extract by using high-performance liquid chromatography. PFA contains antioxidant compounds such as rosmarinic acid, luteolin-7-O-glucuronide, and apigenin-7-O-glucuronide, and has been shown to inhibit reactive oxygen species generation in C2C12 muscle cells. In an ex vivo study, PFA inhibited the carbachol (100 μM)-induced contraction of ciliary muscle from rabbit eyeball. We then investigated the mechanism by which PFA caused muscle relaxation and found that it effectively increased cyclic GMP production and inhibited PDE5A activity, but did not affect the cyclic AMP pathway, in cultured human aortic smooth muscle cells. In addition, PFA (50, 100, and 200 µg/mL) dose-dependently decreased basal intracellular calcium in smooth muscle cells and attenuated the endothelin-1-stimulated increase in intracellular calcium. Finally, we performed a clinical study to evaluate the effects of PFA on the near point of accommodation (NPA) after visual display terminal (VDT) work. Thirty participants were randomized to either PFA (500 mg/day) or placebo, and intake for one consecutive week. NPA was evaluated before and after 2 h of VDT work, and was found to be improved in the PFA-treated group. Thus, our findings show that PFA may ameliorate visual fatigue.

perilla frutescens var. acuta visual display terminal (VDT) visual fatigue near point of accommodation ciliary muscle

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