1.Correction: Drug Similarity Search Based on Combined Signatures in Gene Expression Profiles.
Kihoon CHA ; Min Sung KIM ; Kimin OH ; Hyunjung SHIN ; Gwan Su YI
Healthcare Informatics Research 2014;20(2):159-159
We have noticed an inadvertent error in our article.
2.Acebutolol, a Cardioselective Beta Blocker, Promotes Glucose Uptake in Diabetic Model Cells by Inhibiting JNK-JIP1 Interaction.
Yi LI ; Nan Young JUNG ; Jae Cheal YOO ; Yul KIM ; Gwan Su YI
Biomolecules & Therapeutics 2018;26(5):458-463
The phosphorylation of JNK is known to induce insulin resistance in insulin target tissues. The inhibition of JNK-JIP1 interaction, which interferes JNK phosphorylation, becomes a potential target for drug development of type 2 diabetes. To discover the inhibitors of JNK-JIP1 interaction, we screened out 30 candidates from 4320 compound library with In Cell Interaction Trap method. The candidates were further confirmed and narrowed down to five compounds using the FRET method in a model cell. Among those five compounds, Acebutolol showed notable inhibition of JNK phosphorylation and elevation of glucose uptake in diabetic models of adipocyte and liver cell. Structural computation showed that the binding affinity of Acebutolol on the JNK-JIP1 interaction site was comparable to the known inhibitor, BI-78D3. Our results suggest that Acebutolol, an FDA-approved beta blocker for hypertension therapy, could have a new repurposed effect on type 2 diabetes elevating glucose uptake process by inhibiting JNK-JIP1 interaction.
Acebutolol*
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Adipocytes
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Cell Communication
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Diabetes Mellitus
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Drug Evaluation, Preclinical
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Glucose*
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Hypertension
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Insulin
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Insulin Resistance
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Liver
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Methods
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Phosphorylation
3.The clinical prognosis of implants that are placed against super-erupted opposing dentition.
Young Kyun KIM ; Kyo Jin AHN ; Pil Young YUN ; Yang Jin YI ; Su Gwan KIM
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2016;42(3):139-143
OBJECTIVES: If teeth are missing, super-eruption of teeth in the opposing arch can occur in the area and can change the occlusal plane. When missing teeth are replaced with implants, the oral surgeon must determine whether or not the super-erupted teeth need to be treated in order to normalize the occlusal plane. In this study, we evaluated the clinical prognosis of dentition after implant placement and prosthetic treatment were completed in an occlusal plane altered by super-erupted teeth in the opposing arch without additional treatment of the super-erupted teeth. MATERIALS AND METHODS: Twenty-two patients (9 males, 13 females) were treated with implants and prosthetics without addressing the super-erupted opposing dentition from April 2004 to August 2012 at Seoul National University Bundang Hospital. A total of 33 implants were placed. Values of crestal bone loss, survival rates, and surgical and prosthetic complications for an average of 29.6 months after prosthetic loading were recorded. RESULTS: In one case, the cover screw was exposed after implant surgery. The mean crestal bone loss was 0.09±0.30 mm. Of the 33 implants, 31 survived, a survival rate of 93.94%. A prosthetic complication occurred in one case but functioned well after correction. CONCLUSION: Favorable clinical results from prosthetic complications, crestal bone loss, and implant survival rates were exhibited in implants next to a super-erupted opposing tooth.
Dental Occlusion
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Dentition*
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Humans
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Male
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Oral and Maxillofacial Surgeons
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Prognosis*
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Seoul
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Survival Rate
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Tooth
4.Drug Similarity Search Based on Combined Signatures in Gene Expression Profiles.
Kihoon CHA ; Min Sung KIM ; Kimin OH ; Hyunjung SHIN ; Gwan Su YI
Healthcare Informatics Research 2014;20(1):52-60
OBJECTIVES: Recently, comparison of drug responses on gene expression has been a major approach to identifying the functional similarity of drugs. Previous studies have mostly focused on a single feature, the expression differences of individual genes. We provide a more robust and accurate method to compare the functional similarity of drugs by diversifying the features of comparison in gene expression and considering the sample dependent variations. METHODS: For differentially expressed gene measurement, we modified the conventional t-test to normalize variations in diverse experimental conditions of individual samples. To extract significant differentially co-expressed gene modules, we searched maximal cliques among the co-expressed gene network. Finally, we calculated a combined similarity score by averaging the two scaled scores from the above two measurements. RESULTS: This method shows significant performance improvement in comparison to other approaches in the test with Connectivity Map data. In the test to find the drugs based on their own expression profiles with leave-one-out cross validation, the proposed method showed an area under the curve (AUC) score of 0.99, which is much higher than scores obtained with previous methods, ranging from 0.71 to 0.93. In the drug networks, we could find well clustered drugs having the same target proteins and novel relations among drugs implying the possibility of drug repurposing. CONCLUSIONS: Inclusion of the features of a co-expressed module provides more implications to infer drug action. We propose that this method be used to find collaborative cellular mechanisms associated with drug action and to simply identify drugs having similar responses.
Biomarkers, Pharmacological
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Drug Repositioning
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Gene Expression Regulation
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Gene Expression*
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Gene Regulatory Networks
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Methods
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Transcriptome*
5.Corrigendum: The seven-year cumulative survival rate of Osstem implants.
Young Kyun KIM ; Bum Su KIM ; Pil Young YUN ; Sang Un MUN ; Yang Jin YI ; Su Gwan KIM ; Kyung In JEONG
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2014;40(3):152-152
This correction is being published to correct the errors of sentences and spelling in abstract.
6.The seven-year cumulative survival rate of Osstem implants.
Young Kyun KIM ; Bum Su KIM ; Pil Young YUN ; Sang Un MUN ; Yang Jin YI ; Su Gwan KIM ; Kyung In JEONG
Journal of the Korean Association of Oral and Maxillofacial Surgeons 2014;40(2):68-75
OBJECTIVES: This study was performed to analyze the cumulative survival rate of Osstem implants (Osstem Implant Co., Ltd.) over a seven-year period. MATERIALS AND METHODS: A total of 105 patients who had 467 Osstem implants that were placed at the Section of Dentistry, Seoul National University Bundang Hospital (Seongnam, Korea) from June 2003 through December 2005 were analyzed. The life table method and a cross-tubulation analysis, log rank test were used to evaluate the survival curve and the influence that the prognostic factors. The prognostic factors, i.e., age and gender of patients, diameter and length, type of implants, bone graft history and loading time were determined with a Cox proportional hazard model based on logistic regression analysis. RESULTS: The seven-year cumulative survival rate of Osstem implants was 95.37%. The Cox proportional hazard model revealed that the following factors had a significant influence on survival rate; increased diameter, reduced prosthetic loading period and performance of bone grafting. CONCLUSION: The osstem implants showed satisfactory results over the seven-year study period.
Bone Transplantation
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Dental Implants
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Dentistry
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Humans
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Life Tables
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Logistic Models
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Proportional Hazards Models
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Seoul
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Survival Rate*
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Transplants
7.Impact of Age on Clinical Outcomes in Middle-aged Korean Female Patients with Acute Myocardial Infarction - Based on a Cut-off Age of 55 Years.
Mi Sook OH ; Myung Ho JEONG ; Seung Hun LEE ; Jung Ae RHEE ; Jin Su CHOI ; In Hyae PARK ; Chung KIM ; Eun Jung KIM ; Hyun Yi KOOK ; Ki Hong LEE ; Doo Sun SIM ; Kye Hun KIM ; Young Joon HONG ; Hyung Wook PARK ; Ju Han KIM ; Young Keun AHN ; Jeong Gwan CHO ; Jong Chun PARK ; Sang Hyung KIM
Korean Journal of Medicine 2016;91(2):158-165
BACKGROUND/AIMS: It is well known that the menopause is related to interference in lipid metabolism, obesity, and a hypercoagulable state. The aim of the present study was to examine the impact of the menopause in middle-aged Korean females with acute myocardial infarction (AMI). METHODS: A total of 1,781 middle-aged females (aged < 65 years) in the Korean Acute Myocardial Infarction registry were enrolled into this study between November 2005 and December 2013. The patients were divided into two groups; the pre-menopause group (≤ 55 years old) and the menopause group (56-64 years old). Major adverse cardiac events (MACE) were analyzed over a one-year follow-up period. RESULTS: The pre-menopause and menopause groups comprised 669 patients (mean age, 49.1 ± 5.6 years) and 1,112 patients (mean age, 60.6 ± 2.6 years), respectively. The incidence of hypertension (42.2% vs. 59.4%, p < 0.001), diabetes mellitus (DM) (27.4% vs. 35.7%, p < 0.001), and dyslipidemia (12.9% vs. 17.7%, p = 0.008) were more frequent in menopausal patients. Additionally, the rates of smoking (20% vs. 12.7%, p < 0.001) and familial history (12% vs. 6.8%, p < 0.001) were higher in the pre-menopause group. The cumulative rates of MACE did not show any differences between the two groups. A history of atrial fibrillation, previous AMI and DM, higher Killip class, and multi-vessel disease were independent risk factors for predicting one-year MACE. CONCLUSIONS: The survival analysis demonstrated that there was no significant difference in MACE rates between the pre-menopause and menopause groups during the one-year follow-up. Therefore, middle-aged pre-menopausal women should be treated more intensively, regardless of whether they are menopausal.
Atrial Fibrillation
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Diabetes Mellitus
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Dyslipidemias
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Female*
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Follow-Up Studies
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Humans
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Hypertension
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Incidence
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Lipid Metabolism
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Menopause
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Myocardial Infarction*
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Obesity
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Premenopause
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Prognosis
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Risk Factors
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Smoke
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Smoking