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Jaesang Ko

Yonsei University · Medicine

About the Lab

Professor Jaesang Ko's research lab specializes in vitreoretinal diseases and orbital inflammatory disorders, with a focus on the pathophysiology and treatment of conditions such as lamellar macular holes, central retinal vein occlusion, and Graves' orbitopathy. The lab investigates molecular mechanisms involving fibrosis, oxidative stress, and signaling pathways (e.g., S1P, PI3K) in orbital fibroblasts, aiming to identify novel therapeutic targets. Innovative clinical and translational approaches, including 3D-printed ocular prostheses and pharmacological modulation of disease pathways, are also central to the lab’s work.

Graves' orbitopathymacular holefibrosisoxidative stress3D printed ocular prosthesis

Research Overview

Papers
76
Total Citations
850
Papers (5y)
29
Primary Field
Medicine

Research Output Trend

Figures are computed from collected data and may differ slightly.

Publications per year (5y)
29total
2022
2023
2024
2025
2026
Citations per year (5y)
147total
20222023202420252026

Selected Papers

15
1
Article|75 citations·2016
Surgical outcomes of lamellar macular holes with and without lamellar hole‐associated epiretinal proliferation
JaeSang Ko, Gyu Ah Kim, Sung Chul Lee, Ji Hwan Lee, Hyoung Jun Koh, Sung Soo Kim, Suk Ho Byeon, Christopher Seungkyu Lee
SJR Q1Acta OphthalmologicaOA

PURPOSE: To report the clinical findings and surgical outcomes of lamellar macular holes (LMHs) with and without lamellar hole-associated epiretinal proliferation (LHEP). METHODS: A retrospective review was performed of 73 eyes of 73 patients who underwent vitrectomy for LMH. Patients were grouped according to the presence of LHEP on preoperative spectral-domain optical coherence tomography (SD-OCT). Postoperative best-corrected visual acuity (BCVA) and OCT features were compared between LMH pat

Radiology, Nuclear Medicine and ImagingMedicine
2
Article|58 citations·2019
Semi-automated fabrication of customized ocular prosthesis with three–dimensional printing and sublimation transfer printing technology
JaeSang Ko, So Hyun Kim, Seung Woon Baek, Min Kyung Chae, Jin Sook Yoon
SJR Q1Scientific ReportsOA

An ocular prosthesis is a custom-made polymeric insert that can be placed in an anophthalmic socket for cosmetic rehabilitation of patients who have lost their eyes. The process of creating such a custom-made ocular prosthesis is time-consuming and labor-intensive because it involves artistic work that is carried out manually. This paper proposes a novel semi-automated method for fabricating customized ocular prostheses using three-dimensional (3D) printing and sublimation transfer printing. In

GeneticsBiochemistry, Genetics and Molecular Biology
3
Article|56 citations·2017
Hydrophilic surface modification of poly(methyl methacrylate)-based ocular prostheses using poly(ethylene glycol) grafting
JaeSang Ko, Kanghee Cho, Sang Won Han, Hyung Kyung Sung, Seung Woon Baek, Won‐Gun Koh, Jin Sook Yoon
SJR Q1Colloids and Surfaces B BiointerfacesOA
GeneticsBiochemistry, Genetics and Molecular Biology
4
Review|53 citations·2016
Emergent Synapse Organizers: LAR-RPTPs and Their Companions
K.A. Han, Sangmin Jeon, Jun Won Um, JaeSang Ko
International review of cell and molecular biologyOA
Molecular BiologyBiochemistry, Genetics and Molecular Biology
5
Article|44 citations·2017
Sphingosine-1-Phosphate Mediates Fibrosis in Orbital Fibroblasts in Graves' Orbitopathy
JaeSang Ko, Min Kyoung Chae, Joon‐Hyung Lee, Eun Jig Lee, Jin Sook Yoon
SJR Q1Investigative Ophthalmology & Visual ScienceOA

Purpose: To investigate the effect of sphingosine-1-phosphate (S1P) on fibrosis in orbital fibroblasts in Graves' orbitopathy (GO). Methods: Orbital fibroblasts were cultured from orbital adipose/connective tissues of patients with GO and healthy control subjects. Effects of treatment with TGF-β and cigarette smoke extract (CSE) on S1P receptor (S1PR) messenger RNA (mRNA) and S1P expression were evaluated by real-time polymerase chain reaction and Western blotting. To evaluate the role of S1P in

Pathology and Forensic MedicineMedicine
6
Article|41 citations·2013
OPTICAL COHERENCE TOMOGRAPHY PREDICTS VISUAL OUTCOME IN ACUTE CENTRAL RETINAL VEIN OCCLUSION
JaeSang Ko, Oh Woong Kwon, Suk Ho Byeon
SJR Q1RetinaOA

Central retinal vein occlusion showing p-MLM on optical coherence tomography had worse visual outcome with higher incidence of being classified into ischemic type CRVO.

OphthalmologyMedicine
7
Article|31 citations·2018
Inhibitory Effect of Idelalisib, a Selective Phosphatidylinositol 3-Kinase δ Inhibitor, on Adipogenesis in an In Vitro Model of Graves' Orbitopathy
JaeSang Ko, Ji-Young Kim, Eun Jig Lee, Jin Sook Yoon
SJR Q1Investigative Ophthalmology & Visual ScienceOA

Idelalisib inhibited proinflammatory cytokine production and adipogenesis in GO orbital fibroblasts in vitro. These results support the potential use of PI3K inhibitors in GO management.

Pathology and Forensic MedicineMedicine
8
Article|29 citations·2020
Anti-oxidative and anti-adipogenic effects of caffeine in an <i>in vitro</i> model of Graves’ orbitopathy
JaeSang Ko, Ji-Young Kim, Jae Woo Kim, Jin Sook Yoon
SJR Q2Endocrine JournalOA

Oxidative stress and adipogenesis play key roles in the pathogenesis of Graves' orbitopathy (GO). In this study, the therapeutic effects of caffeine on the reduction of oxidative stress and adipogenesis were evaluated in primary cultured GO orbital fibroblasts in vitro. Orbital fibroblasts were cultured from orbital connective tissues obtained from individuals with GO. Intracellular reactive oxygen species (ROS) levels induced by hydrogen peroxide or cigarette smoke extract and the expression of

Pathology and Forensic MedicineMedicine
9
Article|27 citations·2018
Prevalence of Ocular Hypertension and Glaucoma as Well as Associated Factors in Graves' Orbitopathy
Ji Won Kim, JaeSang Ko, Young Jun Woo, Hyoung Won Bae, Jin Sook Yoon
SJR Q1Journal of GlaucomaOA

PURPOSE: The purpose of this study was to determine the prevalence of ocular hypertension (OHT) and open-angle glaucoma (OAG) in patients with Graves' orbitopathy (GO) and to investigate the associations between clinical features of the disease and the prevalence of OHT and OAG. METHODS: A cross-sectional analytic study was conducted among a total of 1128 patients with GO. A complete ophthalmic examination was performed, including intraocular pressure, optic disc photography, visual field testin

Pathology and Forensic MedicineMedicine
10
Article|18 citations·2021
PERK mediates oxidative stress and adipogenesis in Graves’ orbitopathy pathogenesis
JaeSang Ko, Jiyoung Kim, Min Kyung Chae, Eun Jig Lee, Jin Sook Yoon
SJR Q1Journal of Molecular EndocrinologyOA

We examined endoplasmic reticulum (ER) stress-related gene expression in orbital tissues from patients with Graves' orbitopathy (GO) and the effects of silencing protein kinase RNA-like endoplasmic reticulum kinase (PERK) in primary orbital fibroblast cultures to demonstrate the therapeutic potential of PERK-modulating agents in GO management. The expression of ER stress-related genes in orbital tissue harvested from individuals with or without GO was studied using real-time PCR. The role of PER

Cell BiologyBiochemistry, Genetics and Molecular Biology
11
Article|17 citations·2023
Yes-Associated Protein Mediates the Transition from Inflammation to Fibrosis in Graves' Orbitopathy
JaeSang Ko, Yong Joon Kim, Soo Hyun Choi, Christopher Seungkyu Lee, Jin Sook Yoon
SJR Q1Thyroid

Background: In Graves' orbitopathy (GO), localized orbital inflammation within the fixed orbit often leads to a fibrotic phenotype resulting in restrictive myopathy or refractory proptosis. However, the molecular pathways related to the transition from inflammation to fibrosis in GO are less understood. Yes-associated protein (YAP) and its homolog, transcriptional coactivator with PDZ-binding motif (TAZ; a Hippo pathway effector), are critical mechanosensors of mechanical stimuli and activate si

Cell BiologyBiochemistry, Genetics and Molecular Biology
12
Article|15 citations·2022
Longitudinal association of thyroid-stimulating immunoglobulin levels with clinical characteristics in thyroid eye disease
JaeSang Ko, Koung Hoon Kook, Jin Sook Yoon, Kyung In Woo, Jae Wook Yang
SJR Q1BMJ OpenOA

OBJECTIVES: The clinical course of thyroid eye disease (TED) is heterogeneous and predicting patients who may develop the severe sequelae of the disease is difficult. In this study, we evaluated the longitudinal association between changes in serum thyroid-stimulating hormone (TSH) receptor antibody (TRAb) levels and course of disease activity and severity over time. DESIGN: This was a multicentre, prospective, observational study. SETTING: Fifteen tertiary care oculoplastic service centres in K

Pathology and Forensic MedicineMedicine
13
Review|14 citations·2017
Delayed onset Mycobacterium intracellulare keratitis after laser in situ keratomileusis
JaeSang Ko, Se Kyung Kim, Dong Yong, Tae‐im Kim, Eung Kweon Kim
SJR Q3MedicineOA

This case presents the first case of M intracellulare keratitis after LASIK. LASIK surgeons should aware that post-LASIK keratitis can develop long after the operation and careful suspicion of infectious disease with meticulous diagnostic test is needed.

OphthalmologyMedicine
14
Article|13 citations·2017
Effect of topical loteprednol etabonate with lid hygiene on tear cytokines and meibomian gland dysfunction in prosthetic eye wearers
JaeSang Ko, Yuri Seo, Min Kyung Chae, Sun Young Jang, Jin Sook Yoon
SJR Q1EyeOA
Public Health, Environmental and Occupational HealthMedicine
15
Article|9 citations·2020
Role of binding immunoglobulin protein (BiP) in Graves’ orbitopathy pathogenesis
JaeSang Ko, Ji-Young Kim, Eun Jig Lee, Jin Sook Yoon
SJR Q1Journal of Molecular Endocrinology

Inflammation and adipogenesis represent the main pathogenic mechanisms of Graves' orbitopathy (GO), and oxidative stress is a well-known inducer of GO pathology. Endoplasmic reticulum (ER) stress has been suggested as a major contributor to inflammation and reactive oxygen species (ROS) generation. In this study, we investigated the role of the ER-stress chaperone protein, binding immunoglobulin protein (BiP), in GO pathogenesis. Using primary cultures of orbital fibroblasts from patients with G

Pathology and Forensic MedicineMedicine

Research Areas

Pathology and Forensic MedicineOphthalmologyMolecular BiologySurgeryGeneticsEpidemiology

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