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Jang J, Kang KW, Kim YW, Jeong S, Park J, Park J, Moon J, Jang J, Kim S, Kim S, Cho S, Lee Y, Kim HK, Han J, Ko EA, Jung SC, Kim JH, Ko JH. Cardioprotection via mitochondrial transplantation supports fatty acid metabolism in ischemia-reperfusion injured rat heart. Korean J Physiol Pharmacol 2024; 28:209-217. [PMID: 38682169 PMCID: PMC11058541 DOI: 10.4196/kjpp.2024.28.3.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 02/27/2024] [Accepted: 02/28/2024] [Indexed: 05/01/2024]
Abstract
In addition to cellular damage, ischemia-reperfusion (IR) injury induces substantial damage to the mitochondria and endoplasmic reticulum. In this study, we sought to determine whether impaired mitochondrial function owing to IR could be restored by transplanting mitochondria into the heart under ex vivo IR states. Additionally, we aimed to provide preliminary results to inform therapeutic options for ischemic heart disease (IHD). Healthy mitochondria isolated from autologous gluteus maximus muscle were transplanted into the hearts of Sprague-Dawley rats damaged by IR using the Langendorff system, and the heart rate and oxygen consumption capacity of the mitochondria were measured to confirm whether heart function was restored. In addition, relative expression levels were measured to identify the genes related to IR injury. Mitochondrial oxygen consumption capacity was found to be lower in the IR group than in the group that underwent mitochondrial transplantation after IR injury (p < 0.05), and the control group showed a tendency toward increased oxygen consumption capacity compared with the IR group. Among the genes related to fatty acid metabolism, Cpt1b (p < 0.05) and Fads1 (p < 0.01) showed significant expression in the following order: IR group, IR + transplantation group, and control group. These results suggest that mitochondrial transplantation protects the heart from IR damage and may be feasible as a therapeutic option for IHD.
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Affiliation(s)
- Jehee Jang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Ki-Woon Kang
- Divsion of Cardiology, Department of Internal Medicine, College of Medicine, Chung-Ang University Hospital, Seoul 06973, Korea
| | - Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Seohyun Jeong
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jaeyoon Park
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jihoon Park
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jisung Moon
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Junghyun Jang
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Seohyeon Kim
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Sunghun Kim
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Sungjoo Cho
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Yurim Lee
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hyoung Kyu Kim
- Cardiovascular and Metabolic Disease Center, SMART Marine Therapeutics Center, Inje University, Busan 47392, Korea
| | - Jin Han
- Cardiovascular and Metabolic Disease Center, SMART Marine Therapeutics Center, Inje University, Busan 47392, Korea
| | - Eun-A Ko
- Department of Physiology, School of Medicine, Jeju National University, Jeju 63243, Korea
| | - Sung-Cherl Jung
- Department of Physiology, School of Medicine, Jeju National University, Jeju 63243, Korea
| | - Jung-Ha Kim
- Department of Family Medicine, College of Medicine, Chung-Ang University Hospital, Seoul 06973, Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
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Kim YW, Ko EA, Jung SC, Lee D, Seo Y, Kim S, Kim JH, Bang H, Zhou T, Ko JH. Transcriptomic insight into the translational value of two murine models in human atopic dermatitis. Sci Rep 2021; 11:6616. [PMID: 33758305 PMCID: PMC7988112 DOI: 10.1038/s41598-021-86049-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 03/10/2021] [Indexed: 12/12/2022] Open
Abstract
This study sought to develop a novel diagnostic tool for atopic dermatitis (AD). Mouse transcriptome data were obtained via RNA-sequencing of dorsal skin tissues of CBA/J mice affected with contact hypersensitivity (induced by treatment with 1-chloro-2,4-dinitrobenzene) or brush stimulation-induced AD-like skin condition. Human transcriptome data were collected from German, Swedish, and American cohorts of AD patients from the Gene Expression Omnibus database. edgeR and SAM algorithms were used to analyze differentially expressed murine and human genes, respectively. The FAIME algorithm was then employed to assign pathway scores based on KEGG pathway database annotations. Numerous genes and pathways demonstrated similar dysregulation patterns in both the murine models and human AD. Upon integrating transcriptome information from both murine and human data, we identified 36 commonly dysregulated differentially expressed genes, which were designated as a 36-gene signature. A severity score (AD index) was applied to each human sample to assess the predictive power of the 36-gene AD signature. The diagnostic power and predictive accuracy of this signature were demonstrated for both AD severity and treatment outcomes in patients with AD. This genetic signature is expected to improve both AD diagnosis and targeted preclinical research.
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Affiliation(s)
- Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, 06974, Korea
| | - Eun-A Ko
- Department of Physiology, School of Medicine, Jeju National University, Jeju, 63243, Korea
| | - Sung-Cherl Jung
- Department of Physiology, School of Medicine, Jeju National University, Jeju, 63243, Korea
| | - Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, 06974, Korea
| | - Yelim Seo
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, 06974, Korea
| | - Seongtae Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, 06974, Korea
| | - Jung-Ha Kim
- Department of Family Medicine, College of Medicine, Chung-Ang University Hospital, Seoul, 06973, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, 06974, Korea
| | - Tong Zhou
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV, 89557, USA.
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, 06974, Korea.
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3
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Seo Y, Kim YW, Lee D, Kim D, Kim K, Kim T, Baek C, Lee Y, Lee J, Lee H, Jang G, Jeong W, Choi J, Hwang D, Suh JS, Kim SW, Kim HK, Han J, Bang H, Kim JH, Zhou T, Ko JH. Far-infrared rays enhance mitochondrial biogenesis and GLUT3 expression under low glucose conditions in rat skeletal muscle cells. Korean J Physiol Pharmacol 2021; 25:167-175. [PMID: 33602887 PMCID: PMC7893496 DOI: 10.4196/kjpp.2021.25.2.167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 12/25/2020] [Accepted: 12/27/2020] [Indexed: 12/04/2022]
Abstract
Far-infrared rays (FIR) are known to have various effects on atoms and molecular structures within cells owing to their radiation and vibration frequencies. The present study examined the effects of FIR on gene expression related to glucose transport through microarray analysis in rat skeletal muscle cells, as well as on mitochondrial biogenesis, at high and low glucose conditions. FIR were emitted from a bio-active material coated fabric (BMCF). L6 cells were treated with 30% BMCF for 24 h in medium containing 25 or 5.5 mM glucose, and changes in the expression of glucose transporter genes were determined. The expression of GLUT3 (Slc2a3) increased 2.0-fold (p < 0.05) under 5.5 mM glucose and 30% BMCF. In addition, mitochondrial oxygen consumption and membrane potential (ΔΨm) increased 1.5- and 3.4-fold (p < 0.05 and p < 0.001), respectively, but no significant change in expression of Pgc-1a, a regulator of mitochondrial biogenesis, was observed in 24 h. To analyze the relationship between GLUT3 expression and mitochondrial biogenesis under FIR, GLUT3 was down-modulated by siRNA for 72 h. As a result, the ΔΨm of the GLUT3 siRNA-treated cells increased 3.0-fold (p < 0.001), whereas that of the control group increased 4.6-fold (p < 0.001). Moreover, Pgc-1a expression increased upon 30% BMCF treatment for 72 h; an effect that was more pronounced in the presence of GLUT3. These results suggest that FIR may hold therapeutic potential for improving glucose metabolism and mitochondrial function in metabolic diseases associated with insufficient glucose supply, such as type 2 diabetes.
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Affiliation(s)
- Yelim Seo
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Donghyeon Kim
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Kyoungseo Kim
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Taewoo Kim
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Changyeob Baek
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Yerim Lee
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Junhyeok Lee
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hosung Lee
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Geonwoo Jang
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Wonyeong Jeong
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Junho Choi
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Doegeun Hwang
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jung Soo Suh
- Department of Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Sun-Woo Kim
- Cardiovascular and Metabolic Disease Center, SMART Marine Therapeutics Center, Inje University, Busan 47392, Korea
| | - Hyoung Kyu Kim
- Cardiovascular and Metabolic Disease Center, SMART Marine Therapeutics Center, Inje University, Busan 47392, Korea
| | - Jin Han
- Cardiovascular and Metabolic Disease Center, SMART Marine Therapeutics Center, Inje University, Busan 47392, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jung-Ha Kim
- Department of Family Medicine, College of Medicine, Chung-Ang University Hospital, Seoul 06973, Korea
| | - Tong Zhou
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV 89557, USA
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
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Ezeokeke CK, Bobola MS, Selby M, Ko JH, Friedly JL, Mourad PD. Case study of an amputee regaining sensation and muscle function in a residual limb after peripheral nerve stimulation by intense focused ultrasound. Brain Stimul 2020; 13:527-529. [PMID: 32289669 PMCID: PMC7195996 DOI: 10.1016/j.brs.2020.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/03/2020] [Accepted: 01/05/2020] [Indexed: 11/28/2022] Open
Affiliation(s)
- C K Ezeokeke
- Department of Neurological Surgery, University of Washington, Seattle, WA, USA
| | - M S Bobola
- Department of Neurological Surgery, University of Washington, Seattle, WA, USA
| | - M Selby
- Department of Neurological Surgery, University of Washington, Seattle, WA, USA
| | - J H Ko
- Department of Plastic Surgery, Northwestern University, Chicago, IL, USA
| | - J L Friedly
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA
| | - P D Mourad
- Department of Neurological Surgery, University of Washington, Seattle, WA, USA; Division of Engineering and Mathematics, University of Washington, Bothell, WA, USA.
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Ko EA, Kim YW, Lee D, Choi J, Kim S, Seo Y, Bang H, Kim JH, Ko JH. Expression of potassium channel genes predicts clinical outcome in lung cancer. Korean J Physiol Pharmacol 2019; 23:529-537. [PMID: 31680775 PMCID: PMC6819903 DOI: 10.4196/kjpp.2019.23.6.529] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 10/02/2019] [Accepted: 10/02/2019] [Indexed: 12/26/2022]
Abstract
Lung cancer is the most common cause of cancer deaths worldwide and several molecular signatures have been developed to predict survival in lung cancer. Increasing evidence suggests that proliferation and migration to promote tumor growth are associated with dysregulated ion channel expression. In this study, by analyzing high-throughput gene expression data, we identify the differentially expressed K+ channel genes in lung cancer. In total, we prioritize ten dysregulated K+ channel genes (5 up-regulated and 5 down-regulated genes, which were designated as K-10) in lung tumor tissue compared with normal tissue. A risk scoring system combined with the K-10 signature accurately predicts clinical outcome in lung cancer, which is independent of standard clinical and pathological prognostic factors including patient age, lymph node involvement, tumor size, and tumor grade. We further indicate that the K-10 potentially predicts clinical outcome in breast and colon cancers. Molecular signature discovered through K+ gene expression profiling may serve as a novel biomarker to assess the risk in lung cancer.
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Affiliation(s)
- Eun-A Ko
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, Nevada 89557, USA
| | - Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jeongyoon Choi
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Seongtae Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Yelim Seo
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jung-Ha Kim
- Department of Family Medicine, Chung-Ang University Hospital, College of Medicine, Chung-Ang University, Seoul 06973, Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
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6
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Lee D, Seo Y, Kim YW, Kim S, Choi J, Moon SH, Bae H, Kim HS, Kim H, Kim JH, Kim TY, Kim E, Yim S, Lim I, Bang H, Kim JH, Ko JH. Profiling of remote skeletal muscle gene changes resulting from stimulation of atopic dermatitis disease in NC/Nga mouse model. Korean J Physiol Pharmacol 2019; 23:367-379. [PMID: 31496874 PMCID: PMC6717787 DOI: 10.4196/kjpp.2019.23.5.367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/07/2019] [Accepted: 07/09/2019] [Indexed: 01/22/2023]
Abstract
Although atopic dermatitis (AD) is known to be a representative skin disorder, it also affects the systemic immune response. In a recent study, myoblasts were shown to be involved in the immune regulation, but the roles of muscle cells in AD are poorly understood. We aimed to identify the relationship between mitochondria and atopy by genome-wide analysis of skeletal muscles in mice. We induced AD-like symptoms using house dust mite (HDM) extract in NC/Nga mice. The transcriptional profiles of the untreated group and HDM-induced AD-like group were analyzed and compared using microarray, differentially expressed gene and functional pathway analyses, and protein interaction network construction. Our microarray analysis demonstrated that immune response-, calcium handling-, and mitochondrial metabolism-related genes were differentially expressed. In the Kyoto Encyclopedia of Genes and Genomes (KEGG) and Gene Ontology pathway analyses, immune response pathways involved in cytokine interaction, nuclear factor-kappa B, and T-cell receptor signaling, calcium handling pathways, and mitochondria metabolism pathways involved in the citrate cycle were significantly upregulated. In protein interaction network analysis, chemokine family-, muscle contraction process-, and immune response-related genes were identified as hub genes with many interactions. In addition, mitochondrial pathways involved in calcium signaling, cardiac muscle contraction, tricarboxylic acid cycle, oxidation-reduction process, and calcium-mediated signaling were significantly stimulated in KEGG and Gene Ontology analyses. Our results provide a comprehensive understanding of the genome-wide transcriptional changes of HDM-induced AD-like symptoms and the indicated genes that could be used as AD clinical biomarkers.
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Affiliation(s)
- Donghee Lee
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Yelim Seo
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Young-Won Kim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Seongtae Kim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Jeongyoon Choi
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Sung-Hee Moon
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hyemi Bae
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hui-Sok Kim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hangyeol Kim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Jae-Hyun Kim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Tae-Young Kim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Eunho Kim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Suemin Yim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Inja Lim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hyoweon Bang
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Jung-Ha Kim
- Department of Family Medicine, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Korea
| | - Jae-Hong Ko
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
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Kim YW, Zhou T, Ko EA, Kim S, Lee D, Seo Y, Kwon N, Choi T, Lim H, Cho S, Bae G, Hwang Y, Kim D, Park H, Lee M, Jang E, Choi J, Bae H, Lim I, Bang H, Ko JH. Prediction of itching diagnostic marker through RNA sequencing of contact hypersensitivity and skin scratching stimulation mice models. Korean J Physiol Pharmacol 2019; 23:151-159. [PMID: 30820159 PMCID: PMC6384194 DOI: 10.4196/kjpp.2019.23.2.151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 01/04/2019] [Accepted: 01/10/2019] [Indexed: 01/28/2023]
Abstract
Pruritus (itching) is classically defined as an unpleasant cutaneous sensation that leads to scratching behavior. Although the scientific criteria of classification for pruritic diseases are not clear, it can be divided as acute or chronic by duration of symptoms. In this study, we investigated whether skin injury caused by chemical (contact hypersensitivity, CHS) or physical (skin-scratching stimulation, SSS) stimuli causes initial pruritus and analyzed gene expression profiles systemically to determine how changes in skin gene expression in the affected area are related to itching. In both CHS and SSS, we ranked the Gene Ontology Biological Process terms that are generally associated with changes. The factors associated with upregulation were keratinization, inflammatory response and neutrophil chemotaxis. The Kyoto Encyclopedia of Genes and Genomes pathway shows the difference of immune system, cell growth and death, signaling molecules and interactions, and signal transduction pathways. Il1a , Il1b and Il22 were upregulated in the CHS, and Tnf, Tnfrsf1b, Il1b, Il1r1 and Il6 were upregulated in the SSS. Trpc1 channel genes were observed in representative itching-related candidate genes. By comparing and analyzing RNA-sequencing data obtained from the skin tissue of each animal model in these characteristic stages, it is possible to find useful diagnostic markers for the treatment of itching, to diagnose itching causes and to apply customized treatment.
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Affiliation(s)
- Young-Won Kim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Tong Zhou
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV 89557, USA
| | - Eun-A Ko
- Department of Physiology and Cell Biology, University of Nevada, Reno School of Medicine, Reno, NV 89557, USA
| | - Seongtae Kim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Donghee Lee
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Yelim Seo
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Nahee Kwon
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Taeyeon Choi
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Heejung Lim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Sungvin Cho
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Gwanhui Bae
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Yuseong Hwang
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Dojin Kim
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hyewon Park
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Minjae Lee
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Eunkyung Jang
- Department of Medicine, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Jeongyoon Choi
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hyemi Bae
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Inja Lim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hyoweon Bang
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Jae-Hong Ko
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
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8
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Lee D, Seo Y, Kim YW, Kim S, Bae H, Choi J, Lim I, Bang H, Kim JH, Ko JH. Far-infrared radiation stimulates platelet-derived growth factor mediated skeletal muscle cell migration through extracellular matrix-integrin signaling. Korean J Physiol Pharmacol 2019; 23:141-150. [PMID: 30820158 PMCID: PMC6384197 DOI: 10.4196/kjpp.2019.23.2.141] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 01/11/2019] [Accepted: 01/11/2019] [Indexed: 12/12/2022]
Abstract
Despite increased evidence of bio-activity following far-infrared (FIR) radiation, susceptibility of cell signaling to FIR radiation-induced homeostasis is poorly understood. To observe the effects of FIR radiation, FIR-radiated materials-coated fabric was put on experimental rats or applied to L6 cells, and microarray analysis, quantitative real-time polymerase chain reaction, and wound healing assays were performed. Microarray analysis revealed that messenger RNA expressions of rat muscle were stimulated by FIR radiation in a dose-dependent manner in amount of 10% and 30% materials-coated. In 30% group, 1,473 differentially expressed genes were identified (fold change [FC] > 1.5), and 218 genes were significantly regulated (FC > 1.5 and p < 0.05). Microarray analysis showed that extracellular matrix (ECM)-receptor interaction, focal adhesion, and cell migration-related pathways were significantly stimulated in rat muscle. ECM and platelet-derived growth factor (PDGF)-mediated cell migration-related genes were increased. And, results showed that the relative gene expression of actin beta was increased. FIR radiation also stimulated actin subunit and actin-related genes. We observed that wound healing was certainly promoted by FIR radiation over 48 h in L6 cells. Therefore, we suggest that FIR radiation can penetrate the body and stimulate PDGF-mediated cell migration through ECM-integrin signaling in rats.
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Affiliation(s)
- Donghee Lee
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Yelim Seo
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Young-Won Kim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Seongtae Kim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hyemi Bae
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Jeongyoon Choi
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Inja Lim
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Hyoweon Bang
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
| | - Jung-Ha Kim
- Department of Family Medicine, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Korea
| | - Jae-Hong Ko
- Department of Physiology, Chung-Ang University College of Medicine, Seoul 06974, Korea
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Bae H, Choi J, Kim YW, Lee D, Kim JH, Ko JH, Bang H, Kim T, Lim I. Effects of Nitric Oxide on Voltage-Gated K⁺ Currents in Human Cardiac Fibroblasts through the Protein Kinase G and Protein Kinase A Pathways but Not through S-Nitrosylation. Int J Mol Sci 2018. [PMID: 29534509 PMCID: PMC5877675 DOI: 10.3390/ijms19030814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
This study investigated the expression of voltage-gated K+ (KV) channels in human cardiac fibroblasts (HCFs), and the effect of nitric oxide (NO) on the KV currents, and the underlying phosphorylation mechanisms. In reverse transcription polymerase chain reaction, two types of KV channels were detected in HCFs: delayed rectifier K+ channel and transient outward K+ channel. In whole-cell patch-clamp technique, delayed rectifier K+ current (IK) exhibited fast activation and slow inactivation, while transient outward K+ current (Ito) showed fast activation and inactivation kinetics. Both currents were blocked by 4-aminopyridine. An NO donor, S-nitroso-N-acetylpenicillamine (SNAP), increased the amplitude of IK in a concentration-dependent manner with an EC50 value of 26.4 µM, but did not affect Ito. The stimulating effect of SNAP on IK was blocked by pretreatment with 1H-(1,2,4)oxadiazolo[4,3-a]quinoxalin-1-one (ODQ) or by KT5823. 8-bromo-cyclic GMP stimulated the IK. The stimulating effect of SNAP on IK was also blocked by pretreatment with KT5720 or by SQ22536. Forskolin and 8-bromo-cyclic AMP each stimulated IK. On the other hand, the stimulating effect of SNAP on IK was not blocked by pretreatment of N-ethylmaleimide or by DL-dithiothreitol. Our data suggest that NO enhances IK, but not Ito, among KV currents of HCFs, and the stimulating effect of NO on IK is through the PKG and PKA pathways, not through S-nitrosylation.
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Affiliation(s)
- Hyemi Bae
- Department of Physiology, College of Medicine, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea.
| | - Jeongyoon Choi
- Department of Physiology, College of Medicine, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea.
| | - Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea.
| | - Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea.
| | - Jung-Ha Kim
- Department of Family Medicine, College of Medicine, Chung-Ang University Hospital, 102 Heukseok-ro, Seoul 06973, Korea.
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea.
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea.
| | - Taeho Kim
- Department of Internal Medicine, College of Medicine, Chung-Ang University Hospital, 102 Heukseok-ro, Seoul 06973, Korea.
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea.
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Kim JH, Kim GJ, Lee D, Ko JH, Lim I, Bang H, Koes BW, Seong B, Lee DC. Higher maternal vitamin D concentrations are associated with longer leukocyte telomeres in newborns. Matern Child Nutr 2017; 14. [PMID: 28598004 DOI: 10.1111/mcn.12475] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 04/07/2017] [Accepted: 05/05/2017] [Indexed: 12/14/2022]
Abstract
Gestational vitamin D insufficiency is related with increased risks of various diseases and poor health outcomes later in life. Telomere length at birth or early in life is known to be a predictor of individual health. Both vitamin D and telomere length are related with various health conditions, and vitamin D concentrations are associated with leukocyte telomere lengths in women. We investigated the association between maternal vitamin D concentrations and newborn leukocyte telomere lengths. This cross-sectional study included 106 healthy pregnant women without adverse obstetric outcomes and their offspring. We examined the maternal age, weight before pregnancy, health behaviours, and nutritional intakes, along with each newborn's sex and birthweight, and we measured maternal height, telomere length, total white blood cell count, and glycosylated haemoglobin as covariates. Pearson's correlation coefficients were calculated to evaluate the relationship between the baseline variables and newborn leukocyte telomere lengths. To confirm that there was an independent association between newborn leukocyte telomere lengths and maternal vitamin D concentrations, we performed a stepwise multiple linear regression analysis. Newborn leukocyte telomere lengths correlated positively with maternal leukocyte telomere lengths (r = .76, p < .01), maternal 25-hydroxyvitamin D concentrations (r = .72, p < .01), maternal energy intakes (r = .22, p = .03), and newborn body weights (r = .51, p < .01). In the multivariate model, newborn leukocyte telomere lengths were associated with maternal vitamin D concentrations (β = .33, p < .01). These findings suggest that the maternal vitamin D concentration during pregnancy may be a significant determinant of the offspring's telomere length.
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Affiliation(s)
- Jung-Ha Kim
- Department of Family Medicine, Chung-Ang University Medical Center, Seoul, Korea.,Department of Family Medicine, Yonsei University Graduate School, Seoul, Korea
| | - Gwang Jun Kim
- Department of Obstetrics & Gynecology, Chung-Ang University Medical Center, Seoul, Korea
| | - Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Bart W Koes
- Department of General Practice, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Byeongchan Seong
- Department of Applied Statistics, Chung-Ang University, Seoul, Korea
| | - Duk-Chul Lee
- Department of Family Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Zhou T, Tang H, Han Y, Fraidenburg D, Kim YW, Lee D, Choi J, Bang H, Ko JH. Expression profile of mitochondrial voltage-dependent anion channel-1 (VDAC1) influenced genes is associated with pulmonary hypertension. Korean J Physiol Pharmacol 2017; 21:353-360. [PMID: 28461778 PMCID: PMC5409118 DOI: 10.4196/kjpp.2017.21.3.353] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 02/22/2017] [Accepted: 02/27/2017] [Indexed: 11/22/2022]
Abstract
Several human diseases have been associated with mitochondrial voltage-dependent anion channel-1 (VDAC1) due to its role in calcium ion transportation and apoptosis. Recent studies suggest that VDAC1 may interact with endothelium-dependent nitric oxide synthase (eNOS). Decreased VDAC1 expression may limit the physical interaction between VDAC1 and eNOS and thus impair nitric oxide production, leading to cardiovascular diseases, including pulmonary arterial hypertension (PAH). In this report, we conducted meta-analysis of genome-wide expression data to identify VDAC1 influenced genes implicated in PAH pathobiology. First, we identified the genes differentially expressed between wild-type and Vdac1 knockout mouse embryonic fibroblasts in hypoxic conditions. These genes were deemed to be influenced by VDAC1 deficiency. Gene ontology analysis indicates that the VDAC1 influenced genes are significantly associated with PAH pathobiology. Second, a molecular signature derived from the VDAC1 influenced genes was developed. We suggest that, VDAC1 has a protective role in PAH and the gene expression signature of VDAC1 influenced genes can be used to i) predict severity of pulmonary hypertension secondary to pulmonary diseases, ii) differentiate idiopathic pulmonary artery hypertension (IPAH) patients from controls, and iii) differentiate IPAH from connective tissue disease associated PAH.
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Affiliation(s)
- Tong Zhou
- Department of Physiology and Cell Biology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Haiyang Tang
- Department of Medicine, University of Arizona, Tucson, AZ 85721, USA
| | - Ying Han
- Department of Physiology, Nanjing Medical University, Nanjing, Jiangsu 211166, China
| | - Dustin Fraidenburg
- Section of Pulmonary, Critical Care, Sleep & Allergy, Department of Medicine, The University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jeongyoon Choi
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
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Hwang JH, Park SJ, Ko WG, Kang SM, Lee DB, Bang J, Park BJ, Wee CB, Kim DJ, Jang IS, Ko JH. Cordycepin induces human lung cancer cell apoptosis by inhibiting nitric oxide mediated ERK/Slug signaling pathway. Am J Cancer Res 2017; 7:417-432. [PMID: 28401001 PMCID: PMC5385633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 02/16/2017] [Indexed: 06/07/2023] Open
Abstract
Nitric oxide (NO) is an important signaling molecule and a component of the inflammatory cascade. Besides, it is also involved in tumorigenesis. Aberrant upregulation and activation of the ERK cascade by NO often leads to tumor cell development. However, the role of ERK inactivation induced by the negative regulation of NO during apoptosis is not completely understood. In this study, treatment of A549 and PC9 human lung adenocarcinoma cell lines with cordycepin led to a reduction in their viability. Analysis of the effect of cordycepin treatment on ERK/Slug signaling activity in the A549 cell line revealed that LPS-induced inflammatory microenvironments could stimulate the expression of TNF-α, CCL5, IL-1β, IL-6, IL-8 and upregulate NO, phospho-ERK (p-ERK), and Slug expression. In addition, constitutive expression of NO was observed. Cordycepin inhibited LPS-induced stimulation of iNOS, NO, p-ERK, and Slug expression. L-NAME, an inhibitor of NOS, inhibited p-ERK and Slug expression. It was also found that cordycepin-mediated inhibition of ERK downregulated Slug, whereas overexpression of ERK led to an upregulation of Slug levels in the cordycepin-treated A549 cells. Inhibition of Slug by siRNA induced Bax and caspase-3, leading to cordycepin-induced apoptosis. Cordycepin-mediated inhibition of ERK led to a reduction in phospho-GSK3β (p-GSK3β) and Slug levels, whereas LiCl, an inhibitor of GSK3β, upregulated p-GSK3β and Slug. Overall, the results obtained indicate that cordycepin inhibits the ERK/Slug signaling pathway through the activation of GSK3β which, in turn, upregulates Bax, leading to apoptosis of the lung cancer cells.
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Affiliation(s)
- Jung Hoo Hwang
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
| | - Soo Jung Park
- Department of Sasang Constitutional Medicine, Woosuk UniversityWanju 55338, Jeonbuk, Republic of Korea
| | - Won Gyu Ko
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
| | - Seong-Mun Kang
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
| | - Da Bin Lee
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
| | - Junho Bang
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
| | - Byung-Joo Park
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
| | - Chung-Beum Wee
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
| | - Dae Joon Kim
- Department of Biomedical Sciences, School of Medicine, University of Texas Rio Grande ValleyEdinburg, TX 78539, USA
| | - Ik-Soon Jang
- Division of Bioconvergence Analysis, Korea Basic Science InstituteDaejeon 305-333, Republic of Korea
| | - Jae-Hong Ko
- Department of Physiology, Chung-Ang University College of MedicineSeoul 06974, Republic of Korea
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Lee WM, Choi JS, Bae J, Jung US, Koh AR, Ko JH. Can Morcellation Really Worsen the Prognosis of Unexpected Uterine Malignancy? J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Jung US, Choi JS, Bae J, Lee WM, Eom JM, Koh AR, Ko JH. Learning Curve for Systemic Laparoscopic Para-Aortic Lymphadenectomy Up to the Left Renal Vein Level for Gynecologic Cancers: Assessment After 324 Consecutive Patients. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Lee WM, Choi JS, Bae J, Koh AR, Jung US, Ko JH. Laparoscopic Restaging Surgery in Patients With Unexpected Uterine Cancer. J Minim Invasive Gynecol 2016; 22:S228. [PMID: 27679115 DOI: 10.1016/j.jmig.2015.08.804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- W M Lee
- Division of Gynecologic Oncology and Gynecologic Minimally Invasive Surgery, Department of Obstetrics and Gynecology, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - J S Choi
- Division of Gynecologic Oncology and Gynecologic Minimally Invasive Surgery, Department of Obstetrics and Gynecology, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - J Bae
- Division of Gynecologic Oncology and Gynecologic Minimally Invasive Surgery, Department of Obstetrics and Gynecology, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - A R Koh
- Division of Gynecologic Oncology and Gynecologic Minimally Invasive Surgery, Department of Obstetrics and Gynecology, Hanyang University College of Medicine, Seoul, Republic of Korea
| | - U S Jung
- Department of Obstetrics and Gynecology, Hallym University Hangang Sacred Heart Hospital, Seoul, Republic of Korea
| | - J H Ko
- Department of Obstetrics and Gynecology, Kangwon National University Hospital, Gangwon-Do, Republic of Korea
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16
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Koh AR, Choi JS, Bae J, Lee WM, Ko JH, Jung US. Laparoscopic Fertility-Saving Staging Surgery for Woman With Huge Pelvic Mass. J Minim Invasive Gynecol 2016; 22:S129. [PMID: 27678694 DOI: 10.1016/j.jmig.2015.08.403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- A R Koh
- Hanyang University College of Medicine, Seoul, Korea
| | - J S Choi
- Hanyang University College of Medicine, Seoul, Korea
| | - J Bae
- Hanyang University College of Medicine, Seoul, Korea
| | - W M Lee
- Hanyang University College of Medicine, Seoul, Korea
| | - J H Ko
- Kangwon National University Hospital, Chuncheon-Si, Gangwon-Do, Korea
| | - U S Jung
- Hallym University Sacred Hangang Heart Hospital, Seoul, Korea
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17
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Bae H, Lee D, Kim YW, Choi J, Lee HJ, Kim SW, Kim T, Noh YH, Ko JH, Bang H, Lim I. Effects of hydrogen peroxide on voltage-dependent K(+) currents in human cardiac fibroblasts through protein kinase pathways. Korean J Physiol Pharmacol 2016; 20:315-24. [PMID: 27162486 PMCID: PMC4860374 DOI: 10.4196/kjpp.2016.20.3.315] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 04/01/2016] [Accepted: 04/04/2016] [Indexed: 01/29/2023]
Abstract
Human cardiac fibroblasts (HCFs) have various voltage-dependent K(+) channels (VDKCs) that can induce apoptosis. Hydrogen peroxide (H2O2) modulates VDKCs and induces oxidative stress, which is the main contributor to cardiac injury and cardiac remodeling. We investigated whether H2O2 could modulate VDKCs in HCFs and induce cell injury through this process. In whole-cell mode patch-clamp recordings, application of H2O2 stimulated Ca(2+)-activated K(+) (KCa) currents but not delayed rectifier K(+) or transient outward K(+) currents, all of which are VDKCs. H2O2-stimulated KCa currents were blocked by iberiotoxin (IbTX, a large conductance KCa blocker). The H2O2-stimulating effect on large-conductance KCa (BKCa) currents was also blocked by KT5823 (a protein kinase G inhibitor) and 1 H-[1, 2, 4] oxadiazolo-[4, 3-a] quinoxalin-1-one (ODQ, a soluble guanylate cyclase inhibitor). In addition, 8-bromo-cyclic guanosine 3', 5'-monophosphate (8-Br-cGMP) stimulated BKCa currents. In contrast, KT5720 and H-89 (protein kinase A inhibitors) did not block the H2O2-stimulating effect on BKCa currents. Using RT-PCR and western blot analysis, three subtypes of KCa channels were detected in HCFs: BKCa channels, small-conductance KCa (SKCa) channels, and intermediate-conductance KCa (IKCa) channels. In the annexin V/propidium iodide assay, apoptotic changes in HCFs increased in response to H2O2, but IbTX decreased H2O2-induced apoptosis. These data suggest that among the VDKCs of HCFs, H2O2 only enhances BKCa currents through the protein kinase G pathway but not the protein kinase A pathway, and is involved in cell injury through BKCa channels.
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Affiliation(s)
- Hyemi Bae
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Jeongyoon Choi
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hong Jun Lee
- Biomedical Research Institute, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Sang-Wook Kim
- Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Taeho Kim
- Department of Internal Medicine, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Yun-Hee Noh
- Department of Biochemistry, School of Medicine, Konkuk University, Seoul 05029, Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 06974, Korea
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Lee WM, Choi JS, Bae J, Koh AR, Jung US, Ko JH. Laparoscopic Excision of Isolated Para-Aortic Lymph Node Recurrence. J Minim Invasive Gynecol 2015; 22:S117. [DOI: 10.1016/j.jmig.2015.08.317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Choi JS, Bae J, Lee WM, Koh AR, Jung US, Ko JH. Laparoscopic Para-Aortic Lymphadenectomy (LPAL): Standard Surgical Boundary and Technique. J Minim Invasive Gynecol 2015; 22:S116. [DOI: 10.1016/j.jmig.2015.08.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Jung US, Choi JS, Bae J, Lee WM, Koh AR, Ko JH. Standard Surgical Boundary, Surgical Results, and Outcomes of Systemic Laparoscopic Para-Aortic Lymphadenectomy Up to the Left Renal Vein Level for Women With Gynecologic Cancers. J Minim Invasive Gynecol 2015; 22:S105. [DOI: 10.1016/j.jmig.2015.08.284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gu W, Gurguis CI, Zhou JJ, Zhu Y, Ko EA, Ko JH, Wang T, Zhou T. Functional and Structural Consequence of Rare Exonic Single Nucleotide Polymorphisms: One Story, Two Tales. Genome Biol Evol 2015; 7:2929-40. [PMID: 26454016 PMCID: PMC4684694 DOI: 10.1093/gbe/evv191] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Genetic variation arising from single nucleotide polymorphisms (SNPs) is ubiquitously found among human populations. While disease-causing variants are known in some cases, identifying functional or causative variants for most human diseases remains a challenging task. Rare SNPs, rather than common ones, are thought to be more important in the pathology of most human diseases. We propose that rare SNPs should be divided into two categories dependent on whether the minor alleles are derived or ancestral. Derived alleles are less likely to have been purified by evolutionary processes and may be more likely to induce deleterious effects. We therefore hypothesized that the rare SNPs with derived minor alleles would be more important for human diseases and predicted that these variants would have larger functional or structural consequences relative to the rare variants for which the minor alleles are ancestral. We systematically investigated the consequences of the exonic SNPs on protein function, mRNA structure, and translation. We found that the functional and structural consequences are more significant for the rare exonic variants for which the minor alleles are derived. However, this pattern is reversed when the minor alleles are ancestral. Thus, the rare exonic SNPs with derived minor alleles are more likely to be deleterious. Age estimation of rare SNPs confirms that these potentially deleterious SNPs are recently evolved in the human population. These results have important implications for understanding the function of genetic variations in human exonic regions and for prioritizing functional SNPs in genome-wide association studies of human diseases.
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Affiliation(s)
- Wanjun Gu
- Research Center for Learning Sciences, Southeast University, Nanjing, Jiangsu, China
| | | | - Jin J Zhou
- Department of Epidemiology and Biostatistics, The University of Arizona
| | - Yihua Zhu
- School of Biological Science and Medical Engineering, Southeast University, Nanjing, Jiangsu, China College of Information Science and Technology, Nanjing Agricultural University, Nanjing, Jiangsu, China
| | - Eun-A Ko
- Department of Pharmacology, The University of Nevada School of Medicine, Reno
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Ting Wang
- Department of Medicine, The University of Arizona
| | - Tong Zhou
- Department of Medicine, The University of Arizona
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Wang R, Gurguis CI, Gu W, Ko EA, Lim I, Bang H, Zhou T, Ko JH. Ion channel gene expression predicts survival in glioma patients. Sci Rep 2015; 5:11593. [PMID: 26235283 PMCID: PMC4522676 DOI: 10.1038/srep11593] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 05/28/2015] [Indexed: 12/12/2022] Open
Abstract
Ion channels are important regulators in cell proliferation, migration, and apoptosis. The malfunction and/or aberrant expression of ion channels may disrupt these important biological processes and influence cancer progression. In this study, we investigate the expression pattern of ion channel genes in glioma. We designate 18 ion channel genes that are differentially expressed in high-grade glioma as a prognostic molecular signature. This ion channel gene expression based signature predicts glioma outcome in three independent validation cohorts. Interestingly, 16 of these 18 genes were down-regulated in high-grade glioma. This signature is independent of traditional clinical, molecular, and histological factors. Resampling tests indicate that the prognostic power of the signature outperforms random gene sets selected from human genome in all the validation cohorts. More importantly, this signature performs better than the random gene signatures selected from glioma-associated genes in two out of three validation datasets. This study implicates ion channels in brain cancer, thus expanding on knowledge of their roles in other cancers. Individualized profiling of ion channel gene expression serves as a superior and independent prognostic tool for glioma patients.
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Affiliation(s)
- Rong Wang
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, China
| | | | - Wanjun Gu
- Research Center for Learning Sciences, Southeast University, Nanjing, Jiangsu 210096, China
| | - Eun A Ko
- Department of Pharmacology, University of Nevada School of Medicine, Reno, NV 89557, USA
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, South Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, South Korea
| | - Tong Zhou
- Department of Medicine, University of Arizona, Tucson, AZ 85721, USA
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, South Korea
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Lee D, Kim YW, Kim JH, Yang M, Bae H, Lim I, Bang H, Go KC, Yang GW, Rho YH, Park HS, Park EH, Ko JH. Improvement Characteristics of Bio-active Materials Coated Fabric on Rat Muscular Mitochondria. Korean J Physiol Pharmacol 2015; 19:283-9. [PMID: 25954135 PMCID: PMC4422970 DOI: 10.4196/kjpp.2015.19.3.283] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 02/23/2015] [Accepted: 02/23/2015] [Indexed: 11/18/2022]
Abstract
This study surveys the improvement characteristics in old-aged muscular mitochondria by bio-active materials coated fabric (BMCF). To observe the effects, the fabric (10 and 30%) was worn to old-aged rat then the oxygen consumption efficiency and copy numbers of mitochondria, and mRNA expression of apoptosis- and mitophagy-related genes were verified. By wearing the BMCF, the oxidative respiration significantly increased when using the 30% materials coated fabric. The mitochondrial DNA copy number significantly decreased and subsequently recovered in a dose-dependent manner. The respiratory control ratio to mitochondrial DNA copy number showed a dose-dependent increment. As times passed, Bax, caspase 9, PGC-1α and β-actin increased, and Bcl-2 decreased in a dose-dependent manner. However, the BMCF can be seen to have had no effect on Fas receptor. PINK1 expression did not change considerably and was inclined to decrease in control group, but the expression was down-regulated then subsequently increased with the use of the BMCF in a dose-dependent manner. Caspase 3 increased and subsequently decreased in a dose-dependent manner. These results suggest that the BMCF invigorates mitophagy and improves mitochondrial oxidative respiration in skeletal muscle, and in early stage of apoptosis induced by the BMCF is not related to extrinsic death-receptor mediated but mitochondria-mediated signaling pathway.
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Affiliation(s)
- Donghee Lee
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
| | - Young-Won Kim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
| | - Jung-Ha Kim
- Department of Family Medicine, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
| | - Misuk Yang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
| | - Hyemi Bae
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
| | - Kyung-Chan Go
- Research and Development Center, VENTEX Co. Ltd., Seoul 138-220, Korea
| | - Gwang-Wung Yang
- Research and Development Center, VENTEX Co. Ltd., Seoul 138-220, Korea
| | - Yong-Hwan Rho
- Research and Development Center, VENTEX Co. Ltd., Seoul 138-220, Korea
| | - Hyo-Suk Park
- Research and Development Center, VENTEX Co. Ltd., Seoul 138-220, Korea
| | - Eun-Ho Park
- Research and Development Center, VENTEX Co. Ltd., Seoul 138-220, Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
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Bae H, Lee HJ, Kim K, Kim JH, Kim T, Ko JH, Bang H, Lim I. The stimulating effects of nitric oxide on intermediate conductance Ca²⁺-activated K⁺ channels in human dermal fibroblasts through PKG pathways but not the PKA pathways. CHINESE J PHYSIOL 2015; 57:137-51. [PMID: 24826782 DOI: 10.4077/cjp.2014.bab171] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Nitric oxide (NO) is produced by nitric oxide synthase (NOS) in dermal fibroblasts and is important during wound healing. Intermediate conductance Ca²⁺-activated K+ (IK; IK1; KCa3.1; IKCa; SK4; KCNN4) channels contribute to NOS upregulation, NO production, and various NO-mediated essential functions in many kinds of cells. To determine if the action of NO is linked to IK channel regulation in human dermal fibroblasts, we investigated the expression of IK channels in the cells and the effects and mechanisms of NO on the channels using RT-PCR, western blot analysis, immunocytochemistry and whole-cell and single-channel patch-clamp techniques. The presence of functional IK channels at the RNA, protein and membrane levels was demonstrated and S-nitroso-N-acetylpenicillamine (SNAP) was shown to significantly increase IK currents. The effects of NO were abolished by pretreatment with KT5823 or 1H-[1,2,4]-oxadiazolo [4,3-a]quinoxalin-1-one (ODQ) but not with KT5720. In addition, IK currents were increased by protein kinase G1α or 8-bromo-cGMP but not by forskolin, 8-bromo-cAMP, or catalytic subunits of protein kinase A (PKAcs). On the other hand, PKAcs with cGMP did not increase IK currents, and pretreatment with KT5720 did not block the stimulating effects of 8-Br-cGMP on the IK channels. These data suggest that NO activates IK channels through the PKG but not the PKA pathways, and it seems there is no cross activation between PKG and PKA pathways in human dermal fibroblasts.
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Affiliation(s)
- Hyemi Bae
- Department of 1Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Republic of Korea
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Ko JH, Gu W, Lim I, Zhou T, Bang H. Expression profiling of mitochondrial voltage-dependent anion channel-1 associated genes predicts recurrence-free survival in human carcinomas. PLoS One 2014; 9:e110094. [PMID: 25333947 PMCID: PMC4198298 DOI: 10.1371/journal.pone.0110094] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 09/08/2014] [Indexed: 01/17/2023] Open
Abstract
Background Mitochondrial voltage-dependent anion channels (VDACs) play a key role in mitochondria-mediated apoptosis. Both in vivo and in vitro evidences indicate that VDACs are actively involved in tumor progression. Specifically, VDAC-1, one member of the VDAC family, was thought to be a potential anti-cancer therapeutic target. Our previous study demonstrated that the human gene VDAC1 (encoding the VDAC-1 isoform) was significantly up-regulated in lung tumor tissue compared with normal tissue. Also, we found a significant positive correlation between the gene expression of VDAC1 and histological grade in breast cancer. However, the prognostic power of VDAC1 and its associated genes in human cancers is largely unknown. Methods We systematically analyzed the expression pattern of VDAC1 and its interacting genes in breast, colon, liver, lung, pancreatic, and thyroid cancers. The genes differentially expressed between normal and tumor tissues in human carcinomas were identified. Results The expression level of VDAC1 was uniformly up-regulated in tumor tissue compared with normal tissue in breast, colon, liver, lung, pancreatic, and thyroid cancers. Forty-four VDAC1 interacting genes were identified as being commonly differentially expressed between normal and tumor tissues in human carcinomas. We designated VDAC1 and the 44 dysregulated interacting genes as the VDAC1 associated gene signature (VAG). We demonstrate that the VAG signature is a robust prognostic biomarker to predict recurrence-free survival in breast, colon, and lung cancers, and is independent of standard clinical and pathological prognostic factors. Conclusions VAG represents a promising prognostic biomarker in human cancers, which may enhance prediction accuracy in identifying patients at higher risk for recurrence. Future therapies aimed specifically at VDAC1 associated genes may lead to novel agents in the treatment of cancer.
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Affiliation(s)
- Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Wanjun Gu
- Research Center for Learning Sciences, Southeast University, Nanjing, Jiangsu, China
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Tong Zhou
- Department of Medicine, University of Arizona, Tucson, Arizona, United States of America
- * E-mail: (TZ); (HB)
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
- * E-mail: (TZ); (HB)
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Gu W, Xu Y, Xie X, Wang T, Ko JH, Zhou T. The role of RNA structure at 5' untranslated region in microRNA-mediated gene regulation. RNA 2014; 20:1369-1375. [PMID: 25002673 PMCID: PMC4138320 DOI: 10.1261/rna.044792.114] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Accepted: 05/05/2014] [Indexed: 05/29/2023]
Abstract
Recent studies have suggested that the secondary structure of the 5' untranslated region (5' UTR) of messenger RNA (mRNA) is important for microRNA (miRNA)-mediated gene regulation in humans. mRNAs that are targeted by miRNA tend to have a higher degree of local secondary structure in their 5' UTR; however, the general role of the 5' UTR in miRNA-mediated gene regulation remains unknown. We systematically surveyed the secondary structure of 5' UTRs in both plant and animal species and found a universal trend of increased mRNA stability near the 5' cap in mRNAs that are regulated by miRNA in animals, but not in plants. Intra-genome comparison showed that gene expression level, GC content of the 5' UTR, number of miRNA target sites, and 5' UTR length may influence mRNA structure near the 5' cap. Our results suggest that the 5' UTR secondary structure performs multiple functions in regulating post-transcriptional processes. Although the local structure immediately upstream of the start codon is involved in translation initiation, RNA structure near the 5' cap site, rather than the structure of the full-length 5' UTR sequences, plays an important role in miRNA-mediated gene regulation.
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Affiliation(s)
- Wanjun Gu
- Research Center for Learning Sciences, Southeast University, Nanjing, Jiangsu 210096, China
| | - Yuming Xu
- School of Biological Sciences and Medical Engineering, Southeast University, Nanjing, Jiangsu 210096, China
| | - Xueying Xie
- Research Center for Learning Sciences, Southeast University, Nanjing, Jiangsu 210096, China
| | - Ting Wang
- Department of Medicine, University of Arizona, Tucson, Arizona 85721, USA
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, South Korea
| | - Tong Zhou
- Department of Medicine, University of Arizona, Tucson, Arizona 85721, USA
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Gu W, Li M, Xu Y, Wang T, Ko JH, Zhou T. The impact of RNA structure on coding sequence evolution in both bacteria and eukaryotes. BMC Evol Biol 2014; 14:87. [PMID: 24758737 PMCID: PMC4021280 DOI: 10.1186/1471-2148-14-87] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2014] [Accepted: 04/07/2014] [Indexed: 12/03/2022] Open
Abstract
Background Many studies have found functional RNA secondary structures are selectively conserved among species. But, the effect of RNA structure selection on coding sequence evolution remains unknown. To address this problem, we systematically investigated the relationship between nucleotide conservation level and its structural sensitivity in four model organisms, Escherichia coli, yeast, fly, and mouse. Results We define structurally sensitive sites as those with putative local structure-disruptive mutations. Using both the Mantel-Haenszel procedure and association test, we found structurally sensitive nucleotide sites evolved more slowly than non-sensitive sites in all four organisms. Furthermore, we observed that this association is more obvious in highly expressed genes and region near the start codon. Conclusion We conclude that structurally sensitive sites in mRNA sequences normally have less nucleotide divergence in all species we analyzed. This study extends our understanding of the impact of RNA structure on coding sequence evolution, and is helpful to the development of a codon model with RNA structure information.
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Affiliation(s)
- Wanjun Gu
- Research Center for Learning Sciences, Southeast University, Nanjing, Jiangsu 210096, China.
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Ko JH, Gu W, Lim I, Bang H, Ko EA, Zhou T. Ion channel gene expression in lung adenocarcinoma: potential role in prognosis and diagnosis. PLoS One 2014; 9:e86569. [PMID: 24466154 PMCID: PMC3900557 DOI: 10.1371/journal.pone.0086569] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Accepted: 12/13/2013] [Indexed: 01/23/2023] Open
Abstract
Ion channels are known to regulate cancer processes at all stages. The roles of ion channels in cancer pathology are extremely diverse. We systematically analyzed the expression patterns of ion channel genes in lung adenocarcinoma. First, we compared the expression of ion channel genes between normal and tumor tissues in patients with lung adenocarcinoma. Thirty-seven ion channel genes were identified as being differentially expressed between the two groups. Next, we investigated the prognostic power of ion channel genes in lung adenocarcinoma. We assigned a risk score to each lung adenocarcinoma patient based on the expression of the differentially expressed ion channel genes. We demonstrated that the risk score effectively predicted overall survival and recurrence-free survival in lung adenocarcinoma. We also found that the risk scores for ever-smokers were higher than those for never-smokers. Multivariate analysis indicated that the risk score was a significant prognostic factor for survival, which is independent of patient age, gender, stage, smoking history, Myc level, and EGFR/KRAS/ALK gene mutation status. Finally, we investigated the difference in ion channel gene expression between the two major subtypes of non-small cell lung cancer: adenocarcinoma and squamous-cell carcinoma. Thirty ion channel genes were identified as being differentially expressed between the two groups. We suggest that ion channel gene expression can be used to improve the subtype classification in non-small cell lung cancer at the molecular level. The findings in this study have been validated in several independent lung cancer cohorts.
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Affiliation(s)
- Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Wanjun Gu
- Research Center for Learning Sciences, Southeast University, Nanjing, Jiangsu, China
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Eun A. Ko
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
- * E-mail: (TZ); (EAK)
| | - Tong Zhou
- Department of Medicine, University of Arizona, Tucson, Arizona, United States of America
- * E-mail: (TZ); (EAK)
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Ko JH, Ko EA, Gu W, Lim I, Bang H, Zhou T. Expression profiling of ion channel genes predicts clinical outcome in breast cancer. Mol Cancer 2013; 12:106. [PMID: 24053408 PMCID: PMC3849355 DOI: 10.1186/1476-4598-12-106] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 09/16/2013] [Indexed: 11/22/2022] Open
Abstract
Background Ion channels play a critical role in a wide variety of biological processes, including the development of human cancer. However, the overall impact of ion channels on tumorigenicity in breast cancer remains controversial. Methods We conduct microarray meta-analysis on 280 ion channel genes. We identify candidate ion channels that are implicated in breast cancer based on gene expression profiling. We test the relationship between the expression of ion channel genes and p53 mutation status, ER status, and histological tumor grade in the discovery cohort. A molecular signature consisting of ion channel genes (IC30) is identified by Spearman’s rank correlation test conducted between tumor grade and gene expression. A risk scoring system is developed based on IC30. We test the prognostic power of IC30 in the discovery and seven validation cohorts by both Cox proportional hazard regression and log-rank test. Results 22, 24, and 30 ion channel genes are found to be differentially expressed with a change in p53 mutation status, ER status, and tumor histological grade in the discovery cohort. We assign the 30 tumor grade associated ion channel genes as the IC30 gene signature. We find that IC30 risk score predicts clinical outcome (P < 0.05) in the discovery cohort and 6 out of 7 validation cohorts. Multivariate and univariate tests conducted in two validation cohorts indicate that IC30 is a robust prognostic biomarker, which is independent of standard clinical and pathological prognostic factors including patient age, lymph node status, tumor size, tumor grade, estrogen and progesterone receptor status, and p53 mutation status. Conclusions We identified a molecular gene signature IC30, which represents a promising diagnostic and prognostic biomarker in breast cancer. Our results indicate that information regarding the expression of ion channels in tumor pathology could provide new targets for therapy in human cancers.
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Affiliation(s)
- Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, South Korea.
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Kim JH, Kim HK, Ko JH, Bang H, Lee DC. The relationship between leukocyte mitochondrial DNA copy number and telomere length in community-dwelling elderly women. PLoS One 2013; 8:e67227. [PMID: 23785520 PMCID: PMC3681770 DOI: 10.1371/journal.pone.0067227] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 05/15/2013] [Indexed: 12/19/2022] Open
Abstract
Purpose Both telomere length and mitochondrial function are accepted as reflective indices of aging. Recent studies have shown that telomere dysfunction may influence impaired mitochondrial biogenesis and function. However, there has been no study regarding the possible association between telomere and mitochondrial function in humans. Therefore, the purpose of the study was to identify any relationships between mitochondrial and telomere function. Methods The present study included 129 community-dwelling, elderly women. The leukocyte mitochondrial DNA copy number and telomere length were measured using a quantitative real-time polymerase chain reaction method. Anthropometric measurement, biochemical blood testing, a depression screening questionnaire using a 15-question geriatric depression scale (GDS-15), and a cognitive function test using the Korean version of the mini mental state examination (K-MMSE) were performed. Results Leukocyte mtDNA copy number was positively associated with telomere length (r=0.39, p=<0.0001) and K-MMSE score (r=0.06, p=0.02). Additionally, leukocyte mtDNA copy number was negatively correlated with GDS-15 score (r=-0.17, p=0.04). Age (r=-0.15, p=0.09), waist circumference (r=-0.16, p=0.07), and serum ferritin level (r=-0.13, p=0.07) tended to be inversely correlated with leukocyte mtDNA copy number. With a stepwise multiple regression analysis, telomere length was found to be an independent factor associated with leukocyte mtDNA copy number after adjustment for confounding variables including age, body mass index, waist circumference, total cholesterol, HDL-cholesterol, LDL-cholesterol, triglycerides, hs-CRP, serum ferritin, HOMA-IR, K-MMSE, GDS-15, hypertension, diabetes, dyslipidemia, currently smoking, alcohol drinking, and regular exercise. Conclusions This study showed that leukocyte mtDNA copy number was positively correlated with leukocyte telomere length in community-dwelling elderly women. Our findings suggest that telomere function may influence mitochondrial function in humans.
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Affiliation(s)
- Jung-Ha Kim
- Department of Family Medicine, Chung-Ang University Healthcare System, Seoul, Korea
| | - Hye Kyung Kim
- Health Promotion Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, Korea
- * E-mail: (D-CL); (HB)
| | - Duk-Chul Lee
- Department of Family Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
- * E-mail: (D-CL); (HB)
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Park WS, Heo SC, Jeon ES, Hong DH, Son YK, Ko JH, Kim HK, Lee SY, Kim JH, Han J. Functional expression of smooth muscle-specific ion channels in TGF-β(1)-treated human adipose-derived mesenchymal stem cells. Am J Physiol Cell Physiol 2013; 305:C377-91. [PMID: 23761629 DOI: 10.1152/ajpcell.00404.2012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Human adipose tissue-derived mesenchymal stem cells (hASCs) have the power to differentiate into various cell types including chondrocytes, osteocytes, adipocytes, neurons, cardiomyocytes, and smooth muscle cells. We characterized the functional expression of ion channels after transforming growth factor-β1 (TGF-β1)-induced differentiation of hASCs, providing insights into the differentiation of vascular smooth muscle cells. The treatment of hASCs with TGF-β1 dramatically increased the contraction of a collagen-gel lattice and the expression levels of specific genes for smooth muscle including α-smooth muscle actin, calponin, smooth mucle-myosin heavy chain, smoothelin-B, myocardin, and h-caldesmon. We observed Ca(2+), big-conductance Ca(2+)-activated K(+) (BKCa), and voltage-dependent K(+) (Kv) currents in TGF-β1-induced, differentiated hASCs and not in undifferentiated hASCs. The currents share the characteristics of vascular smooth muscle cells (SMCs). RT-PCR and Western blotting revealed that the L-type (Cav1.2) and T-type (Cav3.1, 3.2, and 3.3), known to be expressed in vascular SMCs, dramatically increased along with the Cavβ1 and Cavβ3 subtypes in TGF-β1-induced, differentiated hASCs. Although the expression-level changes of the β-subtype BKCa channels varied, the major α-subtype BKCa channel (KCa1.1) clearly increased in the TGF-β1-induced, differentiated hASCs. Most of the Kv subtypes, also known to be expressed in vascular SMCs, dramatically increased in the TGF-β1-induced, differentiated hASCs. Our results suggest that TGF-β1 induces the increased expression of vascular SMC-like ion channels and the differentiation of hASCs into contractile vascular SMCs.
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Affiliation(s)
- Won Sun Park
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon, Korea
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Abstract
OBJECTIVE It has been reported that women benefit from the maintenance of telomere length by estrogen. Exercise may favorably influence telomere length, although results are inconsistent regarding the duration and type of exercise and the cell type used to measure telomere length. The purpose of this study was to investigate the relationship between habitual physical exercise and telomere length in peripheral blood mononuclear cells (PBMCs) in postmenopausal women. Postmenopausal women were chosen as study participants because they are typically estrogen deficient. METHODS This experimental-control, cross-sectional study included 44 healthy, nondiabetic, nonsmoking, postmenopausal women. Habitual exercisers and sedentary participants were matched for age and body mass index. Body weight, height, blood pressure, and waist and hip circumference were measured. Mitochondrial DNA copy number and telomere length in PBMCs were determined, and biochemical tests were performed. Habitual physical exercise was defined as combined aerobic and resistance exercise performed for at least 60 minutes per session more than three times a week for more than 12 months. RESULTS The mean age of all participants was 58.11 ± 6.84 years, and participants in the habitual exercise group had been exercising more than three times per week for an average of 19.23 ± 5.15 months. Serum triglyceride levels (P = 0.01), fasting insulin concentrations (P < 0.01), and homeostasis model assessment of insulin resistance (P < 0.01) were significantly lower and high-density lipoprotein cholesterol levels (P < 0.01), circulating adiponectin (P < 0.01), mitochondrial DNA copy number (P < 0.01), and telomere length (P < 0.01) were significantly higher in the habitual exercise group than in the sedentary group. In a stepwise multiple regression analysis, habitual exercise (β = 0.522, P < 0.01) and adiponectin levels (β = 0.139, P = 0.03) were the independent factors associated with the telomere length of PBMCs in postmenopausal women. CONCLUSIONS Habitual physical exercise is associated with greater telomere length in postmenopausal women. This finding suggests that habitual physical exercise in postmenopausal women may reduce telomere attrition.
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Affiliation(s)
- Jung-Ha Kim
- Department of Family Medicine, Chung-Ang University Medical Center, Seoul, Korea
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Lee JY, Bang HW, Ko JH, Kim JH, Lee DC. Leukocyte telomere length is independently associated with gait speed in elderly women. Maturitas 2013; 75:165-9. [PMID: 23567265 DOI: 10.1016/j.maturitas.2013.03.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 02/20/2013] [Accepted: 03/08/2013] [Indexed: 01/20/2023]
Abstract
OBJECTIVES Declining gait speed is common in the elderly population and is associated with age-related conditions. Because telomere length is a reflection of aging and known to affect degenerative changes in organ systems, gait speed may be associated with telomere length. We therefore investigated the relationship between gait speed and leukocyte telomere length in elderly Korean women. STUDY DESIGN Cross-sectional study. MAIN OUTCOME MEASURES A total of 117 Korean elderly women participated. Metabolic variables were assessed along with gait speed calculated as walking distance (6m) divided by time. Leukocyte telomere length was measured by real-time quantitative polymerase chain reaction. RESULTS Gait speed correlated with telomere length (r=0.38, p<0.01), fasting insulin (r=-0.19, p=0.04), homeostasis model assessment of insulin resistance index (HOMA-IR; r=-0.22, p=0.02), triglyceride (r=-0.20, p=0.03), and Korean Mini-Mental State Examination (K-MMSE; r=0.20, p=0.03) after adjusting for age. On step-wise multiple regression analysis, telomere length (β=0.35, p<0.01), K-MMSE (β=0.16, p=0.02), age (β=-0.23, p=0.01), and HOMA-IR (β=-0.19, p=0.03) were identified as independent variables associated with gait speed. CONCLUSIONS This study suggested that telomere length may have a role in maintaining overall health status as well as preserving gait speed in the elderly population. Further studies are required to better understand the significance of our findings.
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Affiliation(s)
- Jee-Yon Lee
- Department of Family Medicine, Severance Hospital, Yonsei University, College of Medicine, 250 Seongsanno, Seodaemun-gu, 120-752 Seoul, Republic of Korea
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Yun J, Bae H, Choi SE, Kim JH, Choi YW, Lim I, Lee CS, Lee MW, Ko JH, Seo SJ, Bang H. Taxifolin Glycoside Blocks Human ether-a-go-go Related Gene K(+) Channels. Korean J Physiol Pharmacol 2013; 17:37-42. [PMID: 23440017 PMCID: PMC3579103 DOI: 10.4196/kjpp.2013.17.1.37] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 12/03/2012] [Accepted: 12/11/2012] [Indexed: 11/24/2022]
Abstract
Taxifolin glycoside is a new drug candidate for the treatment of atopic dermatitis (AD). Many drugs cause side effects such as long QT syndrome by blocking the human ether-a-go-go related gene (hERG) K+ channels. To determine whether taxifolin glycoside would block hERG K+ channels, we recorded hERG K+ currents using a whole-cell patch clamp technique. We found that taxifolin glycoside directly blocked hERG K+ current in a concentration-dependent manner (EC50=9.6±0.7 µM). The activation curve of hERG K+ channels was negatively shifted by taxifolin glycoside. In addition, taxifolin glycoside accelerated the activation time constant and reduced the onset of the inactivation time constant. These results suggest that taxifolin glycoside blocks hERG K+ channels that function by facilitating activation and inactivation process.
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Affiliation(s)
- Jihyun Yun
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156-756, Korea
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Jung US, Choi JS, Ko JH, Lee JH, Park SY, Park SH. Decreased prevalence of high-risk human papillomavirus infection is associated with obesity. EUR J GYNAECOL ONCOL 2013; 34:70-74. [PMID: 23590005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
PURPOSE OF INVESTIGATION Obesity is correlated with low education, low economic status, and lower rates of Pap smears, which are known as socio-demographic risk factors for cervical cancer. However, the association between obesity and high-risk human papillomavirus (HR-HPV) infection, the necessary cause of cervical cancer, and its related precursors, is not established. MATERIALS AND METHODS The authors examined the association between obesity and HR-HPV infection in 6,868 patients, who participated in annual health examinations at the Kangbuk Samsung Hospital in Seoul, Korea, from January through December 2007. RESULTS The prevalence of HR-HPV infection was 14.8%. Women infected with HR-HPV had a lower body mass index (BMI), when compared with non-infected women. After adjustment for alcohol intake, cigarette smoking, and marital status, HR-HPV infection was found to be negatively associated with BMI. When the analysis was stratified according to BMI, the risk of HR-HPV infection was significantly lower among those who were overweight (OR = 0.817, 95% CI = 0.680-0.982), or obese (OR = 0.688, 95% CI = 0.556-0.851), when compared with women with normal weight. CONCLUSION HR-HPV infection was associated with obesity defined by BMI, with a lower prevalence of infection observed in obese women.
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Affiliation(s)
- U S Jung
- Department of Obstetrics and Gynecology, Konyang University Hospital, Konyang University College of Medicine, Daejon, Republic of Korea
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Abstract
Synonymous mutations are usually referred to as “silent”, but increasing evidence shows that they are not neutral in a wide range of organisms. We looked into the relationship between synonymous codon usage bias and residue importance of voltage-gated ion channel proteins in mice, rats, and humans. We tested whether translationally optimal codons are associated with transmembrane or channel-forming regions, i.e., the sites that are particularly likely to be involved in the closing and opening of an ion channel. Our hypothesis is that translationally optimal codons are preferred at the sites within transmembrane domains or channel-forming regions in voltage-gated ion channel genes to avoid mistranslation-induced protein misfolding or loss-of-function. Using the Mantel-Haenszel procedure, which applies to categorical data, we found that translationally optimal codons are more likely to be used at transmembrane residues and the residues involved in channel-forming. We also found that the conservation level at synonymous sites in the transmembrane region is significantly higher than that in the non-transmembrane region. This study provides evidence that synonymous sites in voltage-gated ion channel genes are not neutral. Silent mutations at channel-related sites may lead to dysfunction of the ion channel.
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Affiliation(s)
- Tong Zhou
- Institute for Personalized Respiratory Medicine, University of Illinois at Chicago, Chicago, Illinois, United States of America
- Section of Pulmonary, Critical Care, Sleep & Allergy, Department of Medicine, University of Illinois at Chicago, Chicago, Illinois, United States of America
| | - Eun A. Ko
- Department of Medicine, University of California San Francisco, San Francisco, California, United States of America
| | - Wanjun Gu
- Key Laboratory of Child Development and Learning Science of Ministry of Education of China, Southeast University, Nanjing, Jiangsu, China
| | - Inja Lim
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Hyoweon Bang
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
| | - Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
- * E-mail:
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Abstract
The hallmark of puberty is the progressive increase in gonadotropin-releasing hormone (GnRH) activity, reflected by an increase in the circulating concentration of luteinizing hormone (LH). The GnRH stimulation test is widely used in the evaluation of precocious puberty. The aim of our study was to assess the diagnostic utility of basal LH for the diagnosis of central precocious puberty (CPP) in girls. A total of 803 girls were referred to Ajou University Hospital for evaluation of precocious puberty between 2008 and 2011. All subjects underwent GnRH-stimulation tests as part of their evaluation. Serum LH and follicle stimulating hormone (FSH) were measured by immunoradiometric assay before and after the GnRH injection. Of the 803 subjects, 505 (62.9%) were included in the pubertal response group and 298 (37.1%) were in the prepubertal response group. Basal LH level was identified as a significant predictor for CPP. Based on the ROC curve, the optimal cut off point of basal LH related to 'pubertal response' was 1.1 IU/l, which was associated with 69.1% sensitivity and 50.5% specificity, with an area under the ROC curve of 0.620 (95% CI, 0.581-0.660). It is concluded that a single basal LH measurement can be used as a screening test to identify girls with CPP and to determine who should undergo GnRH stimulation test.
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Affiliation(s)
- H S Lee
- Department of Pediatrics, Ajou University School of Medicine, Ajou University Hospital, Suwon, Korea
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Yun J, Bae H, Choi SE, Kim JH, Choi YW, Lim I, Lee CS, Lee MW, Ko JH, Seo SJ, Bang H. Hirsutenone directly blocks human ether-a-go-go related gene K+ channels. Biol Pharm Bull 2012; 34:1815-22. [PMID: 22130236 DOI: 10.1248/bpb.34.1815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The aim of the present study was to investigate whether hirsutenone affects the human ether-a-go-go related gene (hERG) K(+) channels. Many drugs promote formation of the acquired form of long QT syndrome (LQTS) by blocking the hERG K(+) channels. Hirsutenone, a new candidate for the treatment inflammatory skin lesions, induced a concentration-dependent decrease in hERG K(+) current amplitudes. Hirsutenone significantly decreased the time constants at the onset of inactivation. However, the reductions in the time constants of steady-state inactivation and the recovery from inactivation after hirsutenone treatment were not significant. In addition, the drug had no effect on the voltage-dependent activation curve or the steady-state inactivation curve. In summary, hirsutenone potentially acts as a blocker of hERG K(+) channels functioning by modifying the channel inactivation kinetics.
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Affiliation(s)
- Jihyun Yun
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul 156–756, Korea
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Ko JH, Kim YJ. Oculomotor nerve palsy caused by posterior communicating artery aneurysm: evaluation of symptoms after endovascular treatment. Interv Neuroradiol 2011; 17:415-9. [PMID: 22192543 DOI: 10.1177/159101991101700403] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 09/11/2011] [Indexed: 11/16/2022] Open
Abstract
We report the outcome of endovascular treatment in a series of patients presenting with posterior communicating artery aneurysm causing ocular motor nerve palsy. A retrospective study was made of ten patients who were treated by coil embolization of posterior communicating artery aneurysm caused by oculomotor nerve palsy. The assessed parameters were as follows: patient's age, presence of subarachnoid hemorrhage, aneurysm size, preoperative severity of symptoms, and timing of treatment after onset of symptoms. Improvement of oculomotor nerve palsy after treatment was noted in eight patients (80.0%). Complete recovery was noted in seven patients (70.0%), partial recovery in one patient (10.0%), and no recovery in two patients (20%). Clinical presentations with early management (≤2 days) were significant in influencing recovery. Complete recovery from ocular motor nerve palsy was significantly higher in patients with initial incomplete palsy compared with initial complete palsy patients (6/6 versus 1/4). Early treatment and initial partial palsy are relevant to improving prognoses. Endovascular treatment is favored method for treating oculomotor palsy.
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Affiliation(s)
- J H Ko
- Department of Neurosurgery, Dankook University College of Medicine, Cheonan, Choongnam, Korea
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Park WS, Ko JH, Ko EA, Son YK, Hong DH, Jung ID, Park YM, Choi TH, Kim N, Han J. The guanylyl cyclase activator YC-1 directly inhibits the voltage-dependent K+ channels in rabbit coronary arterial smooth muscle cells. J Pharmacol Sci 2010; 112:64-72. [PMID: 20093789 DOI: 10.1254/jphs.09228fp] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
We investigated the effects of YC-1, an activator of soluble guanylyl cyclase (sGC), on voltage-dependent K+ (Kv) channels in smooth muscle cells from freshly isolated rabbit coronary arteries by using the whole-cell patch clamp technique. YC-1 inhibited the Kv current in a dose-dependent fashion with an apparent K(d) of 9.67 microM. It accelerated the decay rate of Kv channel inactivation without altering the kinetics of current activation. The rate constants of association and dissociation for YC-1 were 0.36 +/- 0.01 microM(-1) x s(-1) and 3.44 +/- 0.22 s(-1), respectively. YC-1 did not have a significant effect on the steady-state activation and inactivation curves. The recovery time constant from inactivation was decreased in the presence of YC-1, and application of train pulses (1 or 2 Hz) caused a progressive increase in the YC-1 blockade, indicating that YC-1-induced inhibition of Kv currents is use-dependent. Pretreatment with Bay 41-2272 (also a sGC activator), ODQ (a sGC inhibitor), or Rp-8-Br-PET-cGMPs (a protein kinase G inhibitor) did not affect the basal Kv current and also did not significantly alter the inhibitory effect of YC-1. From these results, we suggest that YC-1 directly inhibits the Kv current independently of sGC activation and in a state-, time-, and use-dependent fashion.
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Affiliation(s)
- Won Sun Park
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, FIRST Mitochondrial Research Group, Biomarker Medical Research Center, Inje University, Korea
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Affiliation(s)
- A S Meyer
- DEPARTMENT OF BIOLOGY, CASE WESTERN RESERVE UNIVERSITY, CLEVELAND, OHIO
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Ko JH, de la Garza M, Marasco PD, Dumanian GA. 71A: THE EFFECTS OF TARGETED REINNERVATION ON NEUROMA FORMATION IN A NOVEL RAT HINDLIMB MODEL. Plast Reconstr Surg 2010. [DOI: 10.1097/01.prs.0000371807.51105.b0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jung WK, Lee DY, Park C, Choi YH, Choi I, Park SG, Seo SK, Lee SW, Yea SS, Ahn SC, Lee CM, Park WS, Ko JH, Choi IW. Cilostazol is anti-inflammatory in BV2 microglial cells by inactivating nuclear factor-kappaB and inhibiting mitogen-activated protein kinases. Br J Pharmacol 2010; 159:1274-85. [PMID: 20128801 DOI: 10.1111/j.1476-5381.2009.00615.x] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND AND PURPOSE Cilostazol is a specific inhibitor of 3'-5'-cyclic adenosine monophosphate (cAMP) phosphodiesterase, which is widely used to treat ischemic symptoms of peripheral vascular disease. Although cilostazol has been shown to exhibit vasodilator properties as well as antiplatelet and anti-inflammatory effects, its cellular mechanism in microglia is unknown. In the present study, we assessed the anti-inflammatory effect of cilostazol on the production of pro-inflammatory mediators in lipopolysaccharide (LPS)-stimulated murine BV2 microglia. EXPERIMENTAL APPROACH We examined the effects of cilostazol on LPS-induced nuclear factor-kappaB (NF-kappaB) activation and phosphorylation of mitogen-activated protein kinases (MAPKs). KEY RESULTS Cilostazol suppressed production of nitric oxide (NO), prostaglandin E(2) (PGE(2)) and the proinflammatory cytokines, interleukin-1 (IL-1), tumour necrosis factor-alpha, and monocyte chemoattractant protein-1 (MCP-1), in a concentration-dependent manner. Inhibitory effects of cilostazol were not affected by treatment with an adenylate cyclase inhibitor, SQ 22536, indicating that these actions of cilostazol were cAMP-independent. Cilostazol significantly inhibited the DNA binding and transcriptional activity of NF-kappaB. Moreover, cilostazol blocked signalling upstream of NF-kappaB activation by inhibiting extracellular signal-regulated kinases 1 and 2 (ERK1/2) and c-Jun N-terminal kinase (JNK), but without affecting the activity of p38 MAPK. CONCLUSION AND IMPLICATIONS Our results demonstrate that suppression of the NF-kappaB, ERK, JNK signalling pathways may inhibit LPS-induced NO and PGE(2) production. Therefore, cilostazol may have therapeutic potential for neurodegenerative diseases by inhibiting pro-inflammatory mediators and cytokine production in activated microglia.
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Affiliation(s)
- Won-Kyo Jung
- Department of Marine Life Science, Chosun University, Gwangju, Republic of Korea
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Ko EA, Park WS, Son YK, Ko JH, Choi TH, Jung ID, Park YM, Hong DH, Kim N, Han J. Calcium Channel Inhibitor, Verapamil, Inhibits the Voltage-Dependent K+ Channels in Rabbit Coronary Smooth Muscle Cells. Biol Pharm Bull 2010; 33:47-52. [DOI: 10.1248/bpb.33.47] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Eun A Ko
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Biomarker Medical Research Center, FIRST Mitochondrial Research Group, Inje University
| | - Won Sun Park
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Biomarker Medical Research Center, FIRST Mitochondrial Research Group, Inje University
| | | | - Jae-Hong Ko
- Department of Physiology, Chung-Ang University
| | - Tae-Hoon Choi
- Department of Physical Education, Andong Science College
| | - In Duk Jung
- Department of Microbiology and Immunology and National Research Laboratory of Dendritic Cell Differentiation & Regulation, Medical Research Institute, Pusan National University, College of Medicine
| | - Yeong-Min Park
- Department of Microbiology and Immunology and National Research Laboratory of Dendritic Cell Differentiation & Regulation, Medical Research Institute, Pusan National University, College of Medicine
| | - Da Hye Hong
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Biomarker Medical Research Center, FIRST Mitochondrial Research Group, Inje University
| | - Nari Kim
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Biomarker Medical Research Center, FIRST Mitochondrial Research Group, Inje University
| | - Jin Han
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Biomarker Medical Research Center, FIRST Mitochondrial Research Group, Inje University
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Ko EA, Park WS, Lim I, Yun J, Kim JH, Kang YK, Kim N, Han J, Bang H, Ko JH. Occurrence and fate of fetal lumbar rib induced byScutellariae radixin rats. ACTA ACUST UNITED AC 2010; 89:201-6. [DOI: 10.1002/bdrb.20242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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Ko JH, Ibrahim MA, Park WS, Ko EA, Kim N, Warda M, Lim I, Bang H, Han J. Cloning of large-conductance Ca(2+)-activated K(+) channel alpha-subunits in mouse cardiomyocytes. Biochem Biophys Res Commun 2009; 389:74-9. [PMID: 19699717 DOI: 10.1016/j.bbrc.2009.08.087] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2009] [Accepted: 08/16/2009] [Indexed: 01/17/2023]
Abstract
Large-conductance Ca(2+)-activated K(+) (BK(Ca)) channels are widely distributed in cellular membranes of various tissues, but have not previously been found in cardiomyocytes. In this study, we cloned a gene encoding the mouse cardiac BK(Ca) channel alpha-subunit (mCardBKa). Sequence analysis of the cDNA revealed an open reading frame encoding 1154 amino acids. Another cDNA variant, identical in amino acid sequence, was also identified by sequence analysis. The nucleotide sequences of the two mCardBKa cDNAs, type 1 (mCardBKa1) and type 2 (mCardBKa2), differed by three nucleotide insertions and one nucleotide substitution in the N-terminal sequence. The amino acid sequence demonstrated that mCardBKa was a unique BK(Ca) channel alpha-subunit in mouse cardiomyocytes, with amino acids 41-1153 being identical to calcium-activated potassium channel SLO1 and amino acids 1-40 corresponding to BK(Ca) channel subfamily M alpha member 1. These findings suggest that a unique BK(Ca) channel alpha-subunit is expressed in mouse cardiomyocytes.
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Affiliation(s)
- Jae-Hong Ko
- Department of Physiology, College of Medicine, Chung-Ang University, Seoul, South Korea
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Han JW, Kwon SY, Won SC, Shin YJ, Ko JH, Lyu CJ. Comprehensive clinical follow-up of late effects in childhood cancer survivors shows the need for early and well-timed intervention. Ann Oncol 2009; 20:1170-7. [PMID: 19270031 DOI: 10.1093/annonc/mdn778] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Due to recent advances in treatment, nearly 80% of childhood cancer patients become long-term survivors. Studies on the late effects of survivors are under way worldwide. However, data on Asian survivors remain limited. METHODS Data on 241 survivors at the Long-term Follow-up Clinic in Severance Hospital, South Korea, were collected and late effects were confirmed by oncologists. RESULTS The median follow-up from diagnosis was 7.8 years. Late effects were identified in 59.8% of survivors and 23.2% had two or more late effects. Grade 3 or higher late effects were present in 10.8%. The most common late effects involved endocrine system (29.0%). Late effects were present in 95.7% of brain tumor survivors and 36.0% of Wilms' tumor survivors. Chemotherapy, hematopoietic stem-cell transplantation and radiotherapy were significant factors associated with the number and severity of late effects (P < 0.05). Brain tumor survivors had more severe late effects (P < 0.001), whereas Wilms' tumor survivors had fewer and milder late effects (P < 0.05). CONCLUSION The observation that over 50% of cancer survivors suffered from late effects during the short follow-up period and that a high frequency of endocrine late effects was present indicates the need for early and well-timed intervention of the survivors.
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Affiliation(s)
- J W Han
- Department of Pediatric Hematology and Oncology, Yonsei University Health System, Seoul, Korea
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Abstract
We admixed cultured porcine keratocytes or corneal endothelial cells in the presence of human sera or peripheral blood mononuclear cells (PBMCs) for 4 to 72 hours to investigate their immune-related susceptibilities to xeno-related rejection. We evaluated complement deposition at 48 hours by flow cytometry after staining with the C3 anti-goat cy3 antibody. The inhibition of proliferation of porcine corneal cells by human sera was examined using the 3-[4,5-dimethy/thiazol-2,5-dephenyl tetrazolium bromide (MTT) assay over 24 to 72 hours. The amount of 51chromium (Cr)-release was estimated after a reaction between the porcine cells and human PBMCs for 4 hours. There was greater C3 deposition in keratocytes (60.2%) than in endothelial cells (26.9%; P = .05, Mann-Whitney U test). Both keratocytes and endothelial cells showed significant levels of proliferative inhibition over a period of 72 hours. The number of 51Cr-release cells on interleukin-2 addition was significantly higher among keratocytes (88.0%) than endothelial cells (51.4%) at a 1:100 target:effector ratio (P = .04, Mann-Whitney U test). Our present data suggested that porcine keratocytes might be key target cells in xeno-related rejections when the porcine cornea is transplanted to primates.
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Affiliation(s)
- M K Kim
- Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Korea
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Jang EH, Moon JS, Ko JH, Ahn CW, Lee HH, Shin JK, Park CS, Kang JH. Novel black soy peptides with antiobesity effects: activation of leptin-like signaling and AMP-activated protein kinase. Int J Obes (Lond) 2008; 32:1161-70. [PMID: 18414417 DOI: 10.1038/ijo.2008.60] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To investigate the mechanisms underlying the antiobesity effects of a novel isoflavone-free peptide mixture (BSP) derived from black soybean. DESIGN Long-term effects of BSP were evaluated in diet-induced obese (DIO) mice fed a high-fat (HF) diet without or with BSP (2, 5 or 10% of energy) for 13 weeks, or for 8 weeks in combination with exercise. Acute effects of BSP on food intake and body weight in rats and leptin-deficient ob/ob mice were evaluated. Cell culture models or tissue extracts were used to investigate the mechanisms underlying the antiobesity effect. MEASUREMENT Total food intake, body weight gain, white adipose tissue (WAT) mass, plasma concentrations of leptin, adiponectin, cholesterol and triglyceride were measured. Janus kinase 2 (JAK2)-dependent signal transducers and activators of the transcription 3 (STAT3) phosphorylation and AMP-activated protein kinase (AMPK) activity were determined using Western-blot in cultured cells or tissue extracts. RESULTS DIO mice fed an HF diet with BSP (2, 5 or 10%) for 13 weeks gained less body weight (21.4, 19.8 or 17.1 g, respectively) than the mice fed an HF diet without BSP (22.6 g) concurrent with inhibition of total food intake in a dose-dependent manner. BSP also significantly decreased food intake in rats and leptin-deficient ob/ob mice. The highest dose of BSP (10%) significantly elevated the plasma adiponectin and decreased plasma triglyceride. BSP activated JAK2-dependent STAT3 in a cell model, and elevated the level of hypothalamic phospho-STAT3 in ob/ob mice. BSP also phosphorylated AMPK and acetyl-CoA carboxylase of C2C12 myocytes in a dose-dependent manner. The antiobesity effect was augmented by low-intensity wheel-based exercise. In exercised mice, BSP significantly decreased periepididymal WAT mass and body weight gain. CONCLUSION These results provided evidences that BSP decreased appetite and HF diet-induced body weight gain particularly in combination with exercise, through leptin-like STAT3 phosphorylation and AMPK activation.
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Affiliation(s)
- E-H Jang
- Department of Pharmacology and Medicinal Toxicology Research Center, Inha Research Institute for Medical Sciences, College of Medicine, Inha University, Incheon, South Korea
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Park WS, Kang SH, Son YK, Kim N, Ko JH, Kim HK, Ko EA, Kim CD, Han J. The mitochondrial Ca2+-activated K+ channel activator, NS 1619 inhibits L-type Ca2+ channels in rat ventricular myocytes. Biochem Biophys Res Commun 2007; 362:31-36. [PMID: 17698036 DOI: 10.1016/j.bbrc.2007.07.057] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2007] [Accepted: 07/13/2007] [Indexed: 11/22/2022]
Abstract
We examined the effects of the mitochondrial Ca(2+)-activated K(+) (mitoBK(Ca)) channel activator NS 1619 on L-type Ca(2+) channels in rat ventricular myocytes. NS 1619 inhibited the Ca(2+) current in a dose-dependent manner. NS 1619 shifted the activation curve to more positive potentials, but did not have a significant effect on the inactivation curve. Pretreatment with inhibitors of membrane BK(Ca) channel, mitoBK(Ca) channel, protein kinase C, protein kinase A, and protein kinase G had little effect on the Ca(2+) current and did not alter the inhibitory effect of NS 1619 significantly. The application of additional NS 1619 in the presence of isoproterenol, a selective beta-adrenoreceptor agonist, reduced the Ca(2+) current to approximately the same level as a single application of NS 1619. In conclusion, our results suggest that NS 1619 inhibits the Ca(2+) current independent of the mitoBK(Ca) channel and protein kinases. Since NS 1619 is widely used to study mitoBK(Ca) channel function, it is essential to verify these unexpected effects of NS 1619 before experimental data can be interpreted accurately.
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Affiliation(s)
- Won Sun Park
- National Research Laboratory for Mitochondrial Signaling, FIRST Mitochondrial Research Group, Department of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, 633-165 Gaegeum-Dong, Busanjin-Gu, Busan 613-735, Republic of Korea
| | - Sung Hyun Kang
- National Research Laboratory for Mitochondrial Signaling, FIRST Mitochondrial Research Group, Department of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, 633-165 Gaegeum-Dong, Busanjin-Gu, Busan 613-735, Republic of Korea
| | - Youn Kyoung Son
- National Research Laboratory for Mitochondrial Signaling, FIRST Mitochondrial Research Group, Department of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, 633-165 Gaegeum-Dong, Busanjin-Gu, Busan 613-735, Republic of Korea
| | - Nari Kim
- National Research Laboratory for Mitochondrial Signaling, FIRST Mitochondrial Research Group, Department of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, 633-165 Gaegeum-Dong, Busanjin-Gu, Busan 613-735, Republic of Korea
| | - Jae-Hong Ko
- National Research Laboratory for Mitochondrial Signaling, FIRST Mitochondrial Research Group, Department of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, 633-165 Gaegeum-Dong, Busanjin-Gu, Busan 613-735, Republic of Korea
| | - Hyoung Kyu Kim
- National Research Laboratory for Mitochondrial Signaling, FIRST Mitochondrial Research Group, Department of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, 633-165 Gaegeum-Dong, Busanjin-Gu, Busan 613-735, Republic of Korea
| | - Eun A Ko
- Department of Pharmacology, College of Medicine and Medical Research Center for Ischemic Tissue Regeneration, Pusan National University, Busan, Republic of Korea
| | - Chi Dae Kim
- Department of Pharmacology, College of Medicine and Medical Research Center for Ischemic Tissue Regeneration, Pusan National University, Busan, Republic of Korea
| | - Jin Han
- National Research Laboratory for Mitochondrial Signaling, FIRST Mitochondrial Research Group, Department of Physiology and Biophysics, College of Medicine, Biohealth Products Research Center, Cardiovascular and Metabolic Disease Center, Inje University, 633-165 Gaegeum-Dong, Busanjin-Gu, Busan 613-735, Republic of Korea.
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