Publications by authors named "Hakjoon Choi"

Blue light is reported to be harmful to eyes by inducing reactive oxygen species (ROS). Herein, the roles of Thunb. leaf extract (PJE) in corneal wound healing under blue light irradiation are investigated.

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L. (family ) includes approximately 470 species found in most parts of the world and is commonly known as skullcaps. L.

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We previously demonstrated that urban particulate matter (UPM) exposure decreases the migration activity and survival of human corneal epithelial cells (HCECs). Herein, we investigated the potential to improve the corneal wound-healing ability of Thunb. leaf extract (PJE) and its active components on UPM-induced ocular surface damage in vitro and in vivo.

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Purpose: Previously, we demonstrated that the specific ratio of Korean multi-herbal formula (SR-5) exhibits hepatoprotective properties against ethanol-induced hepatic damage in rats. Chronic and excessive alcohol consumption is a major etiological factor involved in gastric disease and ulcer development induced by the inflammatory response and oxidative stress.

Methods: The present study evaluated the gastroprotective effects of SR-5 (100, 150, and 200 mg/kg) against hydrochloride acid/ethanol (HCl/EtOH)-induced and indomethacin/hydrochloride acid (INDO/HCl)-induced gastritis in a mouse model and the mechanisms involved.

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We investigated the time-dependent deleterious ocular changes induced by urban particulate matter (UPM) in vitro and in vivo. UPM treatment decreased human corneal epithelial cell migration and survival. Fluorescein scores were consistently increased by UPM application for 16 weeks.

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Our previous study demonstrated that a 5% ethanol extract of unripe (5-RCK) has hypo-cholesterolemic and anti-obesity activity. However, the molecular mechanisms of its effects are poorly characterized. We hypothesized that 5-RCK and one of its major bioactive compounds, ellagic acid, decrease cellular and plasma cholesterol levels.

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The leaves of var. acuta (PFA) are commonly used as a traditional medicine in Korea, Japan, and China. We previously showed that PFA attenuates eye fatigue by improving visual accommodation through a clinical study.

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The tuber of ( Radix in Korean) is an important medicinal herb in Korea and China; however, it is difficult to differentiate from a related medicinal herb, ( Radix in Chinese) We sought to develop a molecular method that could be used to distinguish between the tubers of and . We aligned the chloroplast genome sequences (available in the NCBI database) of the two species and identified three species-specific insertion and deletion (InDel) sites in the , , and intergenic spacer (IGS) regions. To confirm the presence of these three InDels and validate their use as markers, we designed three primer pairs to amplify the , , and IGS regions.

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The fruit of is commonly used as a traditional anthelmintic in Korea, Japan, and China. However, its anti-inflammatory activity and the underlying mechanisms have not been studied systematically. In the present study, we examined the anti-inflammatory activities of an aqueous extract of fruit (SHF) in lipopolysaccharide (LPS)-activated RAW 264.

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Benign prostatic hyperplasia (BPH) is characterized by uncontrolled proliferation of the prostate gland. has been reported to improve sexual behavior in male rats. In this study, we investigated the protective effect of an aqueous extract of (CWW) against BPH development in a testosterone-induced BPH rat model.

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Perilla () is an economically and culturally important plant in East Asia. Plant breeding between cultivars has enhanced the genetic diversity of perilla overall, but means that functionally diverse subspecies are more difficult to identify and distinguish. In this study, we developed gene-based DNA markers to distinguish between the Korean herbal medicinal perilla varieties.

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Pine needle extract (PE) and fermented pine needle extract (FPE) have been reported to show various biological and pharmacological activities such as antioxidant, anti-inflammatory, anti-bacterial, anti-cholesterol, gastrointestinal motility control, and fibrinolytic effect. The aims of our research were to isolate fibrinolytic compounds from PE and FPE and evaluate their antithrombotic activity in vitro and in vivo. Protocatechuic (1) and shikimic (2) acids were isolated and identified from FPE.

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