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Yun G, Kwon EJ, Park S, Jeong JC, Kim S, Na KY, Chin HJ. Comparison between characteristics of immunoglobulin M nephropathy and other glomerular diseases. Kidney Res Clin Pract 2024:j.krcp.23.159. [PMID: 38389153 DOI: 10.23876/j.krcp.23.159] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/05/2023] [Indexed: 02/24/2024] Open
Abstract
Background Immunoglobulin M (IgM) nephropathy (IgMN) is characterized by the IgM deposition in the kidney's mesangium. We assessed the impact of electron-dense deposits (EDDs) on IgMN and compared it to other kidney diseases. Methods We enrolled 63 adult patients with IgMN who underwent renal biopsy from May 2003 to June 2017. We compared clinicopathological features of IgMN based on EDD presence; compared characteristics to 91 minimal change disease (MCD), 103 focal segmental glomerulosclerosis (FSGS), and 469 immunoglobulin A nephropathy (IgAN) patients. Renal events were defined as a >50% decrease in estimated glomerular filtration rate (eGFR), eGFR of <15 mL/min/1.73 m2, or end-stage renal disease development. Results IgMN patients with EDDs had increased mesangial cellularity, matrix accumulation, prominent immunofluorescent staining, and more diffuse podocyte effacement than those without EDD. Clinical characteristics and renal outcomes did not differ significantly based on EDD presence. During 79.5 ± 58.8 months of follow-up, renal events developed in 46.2% and 46.0% of IgMN cases with and without EDD. IgMN (46.0%) and FSGS cases (40.8%) had similar frequencies of renal events and higher frequency than MCD (18.7%) or IgAN cases (26.4%). IgMN cases had more severe manifestations than MCD and IgAN; higher blood pressure, lower proteinuria, and eGFR levels at biopsy than MCD cases; higher blood pressure, proteinuria, frequency of acute kidney injury, and lower eGFR levels. Conclusion Clinical characteristics of IgMN did not differ based on EDD presence. Therefore, IgMN should be defined based on IF findings. IgMN shared clinical characteristics with FSGS but had more severe than MCD and IgAN.
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Affiliation(s)
- Giae Yun
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Eun Jeong Kwon
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Seokwoo Park
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Jong Cheol Jeong
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Sejoong Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
| | - Ki Young Na
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Ho Jun Chin
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Republic of Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
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Jang CH, Lee J, Kwon MJ, Kim Y, Chae JH, Jeong YA, Kwon EJ, Oh J, Kim J. Upregulation of GCLC is Responsible for SFN‐induced Tumor Cell Proliferation. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r4214] [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: 11/11/2022]
Affiliation(s)
- Chan Ho Jang
- Food Science and BiotechnologyKyungpook National UniversityDaegu
| | - Jinkyung Lee
- Food Science and BiotechnologyKyungpook National UniversityDaegu
| | - Min Jeong Kwon
- Food Science and BiotechnologyKyungpook National UniversityDaegu
| | - Yoonsu Kim
- Food Science and BiotechnologyKyungpook National UniversityDaegu
| | - Ji Hyeong Chae
- Integrative BiotechnologyKyungpook National UniversityDaegu
| | - Yoon Ah Jeong
- Food Science and BiotechnologyKyungpook National UniversityDaegu
| | - Eun Jeong Kwon
- Food Science and BiotechnologyKyungpook National UniversityDaegu
| | - Jisun Oh
- New Drug Development CenterDaegu‐Gyeongbuk Medical Innovation FoundationDaegu
| | - Jong‐Sang Kim
- School of Food Science and BiotechnologyKyungpook National UniversityDaegu
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Jeong YA, Chae JH, Jang CH, Kim Y, Lee J, Kwon MJ, Kwon EJ, Kim HJ, Oh J, Kim J. Wasp Venom Relieves Alzheimer's Phenotypes in 5xFAD Transgenic Mice through Inhibition of Aβ Aggregation. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r4358] [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: 11/11/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Hyo Jung Kim
- National Development Institute for Korean MedicineGyeongsan
| | - Jisun Oh
- New Drug Development CenterDaegu
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Park TJ, Choi CW, Oh HK, Kim JO, Kim BK, Kang HK, Kwon EJ, Gweon EJ, Park SJ, Kang HI, Jung KK, Park SM, Kim JH, Han KW, Jeong JY. Stability Evaluation of National Reference Standards for Blood Products in Korea. Toxicol Res 2017; 33:225-231. [PMID: 28744354 PMCID: PMC5523560 DOI: 10.5487/tr.2017.33.3.225] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 06/08/2017] [Accepted: 06/12/2017] [Indexed: 11/26/2022] Open
Abstract
National reference standards (NRSs) for biologics are established through potency estimation by a multicenter joint study of standard materials used in the approval process for national lot release and quality control of vaccines, blood products, and other biologics. In this study, a stability evaluation was conducted to determine whether the potency of NRSs for six blood products was being maintained at a consistent level in Korea. The present study conducted real-time stability tests via in-vivo/in-vitro bioassay on NRSs for blood coagulation factor VIII concentrate (2nd standard), antithrombin concentrate, prekallikrein activator, anti-hepatitis B immunoglobulin, blood coagulation factor IX concentrate, and anti-tetanus human immunoglobulin, as well as a trend analysis using cumulative annual results. The real-time stability test results showed that the mean potency of six NRSs was all within the control limit. In the trend analysis, the potency of NRS for blood coagulation factor VIII concentrate (2nd standard) showed a decreasing trend, while the potency of all other products had been stably maintained. The present study confirmed that the mean potency of NRSs for six blood products had been stably maintained in Korea. The findings of the present study establish a foundation that can ensure the quality of NRSs for biologics in Korea, and it is expected to make a major contribution to the supply of high-quality biologics.
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Affiliation(s)
- Tae Jun Park
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Chan Woong Choi
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Ho Kyung Oh
- Blood Products Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Jae Ok Kim
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Byung Kuk Kim
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Hyun Kyung Kang
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Eun Jeong Kwon
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Eun Jeong Gweon
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Sang Jin Park
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Ho Il Kang
- Blood Products Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Ki Kyung Jung
- Blood Products Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Sang Mi Park
- Blood Products Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Ji Hye Kim
- Blood Products Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Ki Won Han
- Blood Products Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
| | - Ja Young Jeong
- Biologics Research Division, National Institute of Food and Drug Safety Evaluation, Cheongju, Korea
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Kim JO, Kwon EJ, Song DW, Lee JS, Kim DH. miR-185 inhibits endoplasmic reticulum stress-induced apoptosis by targeting Na+/H+ exchanger-1 in the heart. BMB Rep 2017; 49:208-13. [PMID: 26521941 PMCID: PMC4915239 DOI: 10.5483/bmbrep.2016.49.4.193] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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: 09/24/2015] [Indexed: 12/27/2022] Open
Abstract
Prolonged ER stress (ERS) can be associated with the induction of apoptotic cell death in various heart diseases. In this study, we searched for microRNAs affecting ERS in the heart using in silico and in vitro methods. We found that miR-185 directly targets the 3′-untranslated region of Na+/H+ exchanger-1 (NHE-1), a protein involved in ERS. Cardiomyocyte ERS-triggered apoptosis induced by 100 ng/ml tunicamycin (TM) or 1 μM thapsigargin (TG), ERS inducers, was significantly reduced by miR-185 overexpression. Protein expression of pro-apoptotic markers such as CCAAT/enhancer-binding protein homologous protein (CHOP) and cleaved-caspase-3 was also markedly reduced by miR-185 in a dose-dependent manner. Cariporide (20 μM), a pharmacological inhibitor of NHE-1, also attenuated ERS-induced apoptosis in cardiomyocytes and CHOP protein expression, suggesting that NHE-1 plays an important role in ERS-associated apoptosis in cardiomyocytes. Collectively, the present results demonstrate that miR-185 is involved in cardio-protection against ERS-mediated apoptotic cell death. [BMB Reports 2016; 49(4): 208-213]
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Affiliation(s)
- Jin Ock Kim
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
| | - Eun Jeong Kwon
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
| | - Dong Woo Song
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
| | - Jong Sub Lee
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
| | - Do Han Kim
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea
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6
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Kim JO, Song DW, Kwon EJ, Hong SE, Song HK, Min CK, Kim DH. miR-185 plays an anti-hypertrophic role in the heart via multiple targets in the calcium-signaling pathways. PLoS One 2015; 10:e0122509. [PMID: 25767890 PMCID: PMC4358957 DOI: 10.1371/journal.pone.0122509] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [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: 09/05/2014] [Accepted: 02/11/2015] [Indexed: 01/15/2023] Open
Abstract
MicroRNA (miRNA) is an endogenous non-coding RNA species that either inhibits RNA translation or promotes degradation of target mRNAs. miRNAs often regulate cellular signaling by targeting multiple genes within the pathways. In the present study, using Gene Set Analysis, a useful bioinformatics tool to identify miRNAs with multiple target genes in the same pathways, we identified miR-185 as a key candidate regulator of cardiac hypertrophy. Using a mouse model, we found that miR-185 was significantly down-regulated in myocardial cells during cardiac hypertrophy induced by transverse aortic constriction. To confirm that miR-185 is an anti-hypertrophic miRNA, genetic manipulation studies such as overexpression and knock-down of miR-185 in neonatal rat ventricular myocytes were conducted. The results showed that up-regulation of miR-185 led to anti-hypertrophic effects, while down-regulation led to pro-hypertrophic effects, suggesting that miR-185 has an anti-hypertrophic role in the heart. Our study further identified Camk2d, Ncx1, and Nfatc3 as direct targets of miR-185. The activity of Nuclear Factor of Activated T-cell (NFAT) and calcium/calmodulin-dependent protein kinase II delta (CaMKIIδ) was negatively regulated by miR-185 as assessed by NFAT-luciferase activity and western blotting. The expression of phospho-phospholamban (Thr-17), a marker of CaMKIIδ activity, was also significantly reduced by miR-185. In conclusion, miR-185 effectively blocked cardiac hypertrophy signaling through multiple targets, rendering it a potential drug target for diseases such as heart failure.
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Affiliation(s)
- Jin Ock Kim
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Dong Woo Song
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Eun Jeong Kwon
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Seong-Eui Hong
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Hong Ki Song
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Choon Kee Min
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
| | - Do Han Kim
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
- * E-mail: (DHK)
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Lee JH, Kwon EJ, Kim DH. Calumenin has a role in the alleviation of ER stress in neonatal rat cardiomyocytes. Biochem Biophys Res Commun 2013; 439:327-32. [DOI: 10.1016/j.bbrc.2013.08.087] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Accepted: 08/28/2013] [Indexed: 10/26/2022]
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8
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Ock Kim J, Jeong Kwon E, Woo Song D, Yong Ryu J, Ki Song H, Hong SE, Han Kim D. Gene Set Enrichment Analysis Identifies miR-185 as a Negative Regulator of Cardiac Hypertrophy through Targeting the PKC Signaling Pathway. Biophys J 2013. [DOI: 10.1016/j.bpj.2012.11.1751] [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: 10/27/2022] Open
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Park CS, Cha H, Kwon EJ, Jeong D, Hajjar RJ, Kranias EG, Cho C, Park WJ, Kim DH. AAV-mediated knock-down of HRC exacerbates transverse aorta constriction-induced heart failure. PLoS One 2012; 7:e43282. [PMID: 22952658 PMCID: PMC3429470 DOI: 10.1371/journal.pone.0043282] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [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: 03/05/2012] [Accepted: 07/23/2012] [Indexed: 01/10/2023] Open
Abstract
Background Histidine-rich calcium binding protein (HRC) is located in the lumen of sarcoplasmic reticulum (SR) that binds to both triadin (TRN) and SERCA affecting Ca2+ cycling in the SR. Chronic overexpression of HRC that may disrupt intracellular Ca2+ homeostasis is implicated in pathogenesis of cardiac hypertrophy. Ablation of HRC showed relatively normal phenotypes under basal condition, but exhibited a significantly increased susceptibility to isoproterenol-induced cardiac hypertrophy. In the present study, we characterized the functions of HRC related to Ca2+ cycling and pathogenesis of cardiac hypertrophy using the in vitro siRNA- and the in vivo adeno-associated virus (AAV)-mediated HRC knock-down (KD) systems, respectively. Methodology/Principal Findings AAV-mediated HRC-KD system was used with or without C57BL/6 mouse model of transverse aortic constriction-induced failing heart (TAC-FH) to examine whether HRC-KD could enhance cardiac function in failing heart (FH). Initially we expected that HRC-KD could elicit cardiac functional recovery in failing heart (FH), since predesigned siRNA-mediated HRC-KD enhanced Ca2+ cycling and increased activities of RyR2 and SERCA2 without change in SR Ca2+ load in neonatal rat ventricular cells (NRVCs) and HL-1 cells. However, AAV9-mediated HRC-KD in TAC-FH was associated with decreased fractional shortening and increased cardiac fibrosis compared with control. We found that phospho-RyR2, phospho-CaMKII, phospho-p38 MAPK, and phospho-PLB were significantly upregulated by HRC-KD in TAC-FH. A significantly increased level of cleaved caspase-3, a cardiac cell death marker was also found, consistent with the result of TUNEL assay. Conclusions/Significance Increased Ca2+ leak and cytosolic Ca2+ concentration due to a partial KD of HRC could enhance activity of CaMKII and phosphorylation of p38 MAPK, causing the mitochondrial death pathway observed in TAC-FH. Our results present evidence that down-regulation of HRC could deteriorate cardiac function in TAC-FH through perturbed SR-mediated Ca2+ cycling.
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Affiliation(s)
- Chang Sik Park
- College of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Republic of Korea
| | - Hyeseon Cha
- College of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Republic of Korea
| | - Eun Jeong Kwon
- College of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Republic of Korea
| | - Dongtak Jeong
- Cardiovascular Research Center, Mount Sinai School of Medicine, New York, New York, United States of America
| | - Roger J. Hajjar
- Cardiovascular Research Center, Mount Sinai School of Medicine, New York, New York, United States of America
| | - Evangelia G. Kranias
- Department of Pharmacology & Cell Biophysics, College of Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Chunghee Cho
- College of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Republic of Korea
| | - Woo Jin Park
- College of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Republic of Korea
| | - Do Han Kim
- College of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Buk-gu, Gwangju, Republic of Korea
- * E-mail:
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Park CS, Cha H, Kwon EJ, Sreenivasaiah PK, Kim DH. The chemical chaperone 4-phenylbutyric acid attenuates pressure-overload cardiac hypertrophy by alleviating endoplasmic reticulum stress. Biochem Biophys Res Commun 2012; 421:578-84. [PMID: 22525677 DOI: 10.1016/j.bbrc.2012.04.048] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [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: 04/09/2012] [Accepted: 04/10/2012] [Indexed: 11/19/2022]
Abstract
Evidence has shown that endoplasmic reticulum stress (ERS) is associated with the pathogenesis of cardiac hypertrophy. The aim of this study was to investigate whether direct alleviation of ER stress by 4-phenylbutyric acid (PBA), a known chemical chaperone drug, could attenuate pressure-overload cardiac hypertrophy in mice. The effects of orally administered PBA (100mg/kg body weight daily for a week) were examined using mice undergoing transverse aortic constriction (TAC-mice), an animal model to produce pressure overload. TAC application for 1 week led to a 1.8-fold increase in the ratio of the heart weight over body weight (HW/BW) and up-regulation of the hypertrophy markers ANF and BNF accompanied by up-regulation of ERS markers (GRP78, p-PERK, and p-elF2α). The oral administration of PBA to the TAC-mice reduced hypertrophy (19%) and severely downregulated the fibrosis-related genes (transforming growth factor-β1, phospho-smad2, and pro-collagen isoforms). We conclude that ERS is induced as a consequence of remodeling during pathological hypertrophy and that PBA may help to relieve ERS and play a protective role against cardiac hypertrophy and possibly heart failure. We suggest PBA as a novel therapeutic agent for cardiac hypertrophy and fibrosis.
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Affiliation(s)
- Chang Sik Park
- School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology, 123 Cheomdan-gwagiro (1 Oryong-dong), Buk-gu, Gwangju 500-712, Republic of Korea
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Kwon EJ, Bergen JM, Park IK, Pun SH. Peptide-modified vectors for nucleic acid delivery to neurons. J Control Release 2008; 132:230-5. [PMID: 18627784 DOI: 10.1016/j.jconrel.2008.06.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2008] [Revised: 06/05/2008] [Accepted: 06/13/2008] [Indexed: 12/26/2022]
Abstract
Neuron-targeted nucleic acid delivery systems are important technologies for realizing the potential of gene therapy for nervous system disorders. However, neurons are difficult cells to transfect using non-viral vectors due in part to the specific and unique delivery challenges present in these cells. We have investigated several bioactive peptides for their ability to assist in overcoming delivery barriers in mammalian cells. We summarize here our recent progress in developing and applying peptide-modified polycations for nucleic acid delivery. In addition, we present data demonstrating the potential of using multicomponent, peptide-modified polycations for nucleic acid delivery to neurons.
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Affiliation(s)
- E J Kwon
- Department of Bioengineering, University of Washington, Seattle WA 98195, USA
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Abstract
BACKGROUND Desmoglein (Dsg) enzyme-linked immunosorbent assay (ELISA) is a highly sensitive and specific method to detect anti-Dsg3 and anti-Dsg1 IgG autoantibodies in pemphigus vulgaris (PV) and pemphigus foliaceus (PF), respectively. Whereas ELISA index values fluctuate in parallel with disease activity, ELISA positivity during clinical remission has been observed. OBJECTIVE To determine the prevalence of positive Dsg ELISA index values during clinical remission. To ascertain how positive Dsg ELISA scores during remission compare with those during active disease. METHODS Dsg ELISA was performed on serum samples of PV and PF patients taken during remission (lesion-free >or= 3 months on <or= 15 mg or <or= 5 mg/day prednisolone) and active disease. We used a modified ELISA protocol with optimal serum dilutions in sera with very high initial index values, as we previously described. RESULTS When remission was defined as no eruption >or= 3 months with <or= 15 mg/day prednisolone, 20 of 43 PV patients (46.5%) and 4 of 12 PF patients (33.3%) showed Dsg3 and Dsg1 ELISA positivity, respectively. With <or= 5 mg/day, 6 of 17 PV (35.3%) and 1 of 6 PF patients (16.7%) showed Dsg3 and Dsg1 ELISA positivity, respectively. The index value of each ELISA-positive remission serum was consistently lower than that of its corresponding active disease serum. We observed consistent correlation between ELISA index values and indirect immunofluorescence titres. CONCLUSIONS Circulating anti-Dsg IgG autoantibodies are found in a considerable percentage of pemphigus patients in remission, who have high levels of antibody production during active stages.
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Affiliation(s)
- E J Kwon
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
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Kwon EJ, Oh EJ, Kim YS, Hirose F, Ohno K, Nishida Y, Matsukage A, Yamaguchi M, Yoo MA. E2F-dependent transcription of the raf proto-oncogene during Drosophila development. Nucleic Acids Res 2001; 29:1808-14. [PMID: 11292854 PMCID: PMC31312 DOI: 10.1093/nar/29.8.1808] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
D-raf, a Drosophila homolog of the raf proto-oncogene, has diverse functions throughout development and is transcribed in a wide range of tissues, with high levels of expression in the ovary and in association with rapid proliferation. The expression pattern resembles those of S phase genes, which are regulated by E2F transcription factors. In the 5'-flanking region of D-raf, four sequences (E2F sites 1-4) similar to the E2F recognition sequence were found, one of them (E2F site 3) being recognized efficiently by Drosophila E2F (dE2F) in vitro. Transient luciferase expression assays confirmed activation of the D-raf gene promoter by dE2F/dDP. Expression of Draf-lacZ was greatly reduced in embryos homozygous for the dE2F mutation. These results suggest that dE2F is likely to be an important regulator of D-raf transcription.
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Affiliation(s)
- E J Kwon
- Department of Molecular Biology, College of Natural Science, Pusan National University, Pusan 609-735, Korea
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Kim YD, Kwon EJ, Kwon TK, Baek SH, Song SY, Suh JS. Regulation of IL-1beta-mediated MUC2 gene in NCI-H292 human airway epithelial cells. Biochem Biophys Res Commun 2000; 274:112-6. [PMID: 10903904 DOI: 10.1006/bbrc.2000.3107] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study demonstrates for the first time the effects of IL-1beta on the regulation of protein production as well as MUC2 gene transcription in cultured human airway epithelial cells. The effect of IL-1beta on the regulation of MUC2 protein was determined by flow cytometric analysis. The expression level of MUC2 induced by IL-1beta increased in a dose-dependent manner. MUC2 transcripts were detected after 2 h of exposure to IL-1beta and reached maximal level after 8 h. Actinomycin D experiments indicated that the IL-1beta-mediated MUC2 expression was controlled by transcriptional regulation. Both RT-PCR and FACS analysis showed that budesonide concomitantly attenuated IL-1beta mediated MUC2 gene as well as protein production levels. Use of the glucocorticoid receptor antagonist, RU-486, restored the inhibitory effect of budesonide on the IL-1beta-mediated MUC2 protein as well as gene. The data suggest that IL-1beta up-regulates MUC2 gene by transcriptional regulation and that budesonide suppresses the IL-1beta-medicated MUC2 expression via decreased transcriptional activation.
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Affiliation(s)
- Y D Kim
- Department of Otorhinolaryngology, Yeungnam University, Taegu, 705-717, South Korea
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15
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Kwon EJ, Park HS, Kim YS, Oh EJ, Nishida Y, Matsukage A, Yoo MA, Yamaguchi M. Transcriptional regulation of the Drosophila raf proto-oncogene by Drosophila STAT during development and in immune response. J Biol Chem 2000; 275:19824-30. [PMID: 10764759 DOI: 10.1074/jbc.m001114200] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Drosophila raf (D-raf) gene promoter contains a recognition consensus sequence for Drosophila STAT (D-STAT). By band mobility shift assay, we detected a factor binding to the D-STAT-recognition sequence in extracts of cultured Drosophila cells treated with vanadate peroxide. UV-cross-linking analyses suggested the size of the binding factor to be almost same as that of D-STAT. Furthermore, the binding activity was increased in cells cotransfected with HOP and D-STAT expression plasmids. These results strongly suggest that D-STAT binds to the D-STAT recognition sequence in the D-raf gene promoter. Transient luciferase expression assay using Schneider 2 cells indicated that the D-raf gene promoter is activated by D-STAT through the D-STAT-binding site. Furthermore, analyses with transgenic flies carrying Draf-lacZ fusion genes with and without mutations in the D-STAT-binding site pointed to an important role in D-raf gene promoter activity throughout development. We also found that the D-STAT-binding site is required for injury-induced activation of the D-raf gene promoter. Here we propose that D-STAT can participate in regulation of the mitogen-activated protein kinase cascade through D-raf gene activation.
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Affiliation(s)
- E J Kwon
- Laboratory of Cell Biology, Aichi Cancer Center Research Institute, Chikusa-ku, Nagoya, 464-8681, Japan
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Ryu JR, Choi TY, Kwon EJ, Lee WH, Nishida Y, Hayashi Y, Matsukage A, Yamaguchi M, Yoo MA. Transcriptional regulation of the Drosophila-raf proto-oncogene by the DNA replication-related element (DRE)/DRE-binding factor (DREF) system. Nucleic Acids Res 1997; 25:794-9. [PMID: 9016631 PMCID: PMC146497 DOI: 10.1093/nar/25.4.794] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The DRE/DREF system plays an important role in transcription of DNA replication genes such as those encoding the 180 and 73 kDa subunits of DNA polymerase alpha as well as that for encoding PCNA. In this study, we found two sequences homologous to DRE (5'-TATCGATA-3') in the 5'-flanking region (-370 to -357 with respect to the transcription initiation site) of the D-raf gene and confirmed transcriptional activity through gel mobility shift assays, transient CAT assays, and spatial patterns of lacZ expression in transgenic larval tissues carrying D-raf and lacZ fusion genes. Further, we demonstrated that the D-raf gene is another target of the Zerknüllt (Zen) protein with observation of D-raf repression by Zen protein in cultured cells and its ectopic expression in the dorsal region of the homozygous zen mutant embryo. The evidence of DRE/DREF involvement in regulation of the D-raf gene obtained in this study strongly supports the idea that the DRE/DREF system is responsible for the coordinated regulation of cell proliferation-related genes in Drosophila.
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Affiliation(s)
- J R Ryu
- Department of Molecular Biology, College of Natural Science, Pusan National University, Korea
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Lee AJ, Kim SH, Seong YH, Yoo SA, Kwon IG, Jeong YI, Nam HK, Kwon EJ. [A clinical study for promoting quality nursing care in a university hospital]. Taehan Kanho 1993; 32:66-77. [PMID: 8127047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The purpose of this study was to develop a new nursing unit which can meet changing health care needs, enhance patients' satisfaction and nurses' job satisfaction, and finally guarantee quality nursing care with present manpower. For this, one medical unit was selected as a unit for quality care. And one medical unit which is similar in staffing and patients' characteristics was selected as a control unit. To assess present problems and identify the remedies to the problems a hospital-wide survey and a workshop were performed. According to the survey results, educational programs and improvement of the facilities and equipment supply system, managerial support for interdepartmental cooperation and intensification of bed-side nursing care were adopted as main principles for operating model unit. This model unit was operated for 3 months from Sep. 1, 1992 to Nov. 30, 1992. To evaluate the effectiveness of the model unit, direct/indirect nursing care hours, patients' satisfaction to nursing care, nurses' job satisfaction, and quality care index were measured. Direct/indirect nursing care hours were compared with that of the control unit, and patients' and nurses' satisfaction and quality care index were measured before and after operating model unit and compared with each other. The results of the study were as follows; 1. In the model unit mean direct nursing care hours per each shift was 146.88 minutes and indirect nursing care hours was 354.72 minutes. The ratio of the direct nursing care hour to indirect nursing hour was 29.6:70.4 and that of the control unit was 26.9:73.1. Direct nursing care hour in model unit was longer than that of the control unit. But, the difference was not significant. In subcategories of direct nursing care, the time spent in mobility and exercise, conservation of body temperature, hygiene, and communication and health education were longer than that of the control unit. 2. Indirect nursing care hour in model unit was shorter than that of the control unit. But, the difference was not significant. In subcategories of indirect nursing care, the time spent in drug management and ward arrangement was shorter than that of the control unit. 3. Patients' satisfaction to nursing care was increased significantly after operating the model unit (T = -3.48, P = 0.002) and satisfaction to subcategories of physical comfort measure, psychological care, and unit management components were significantly higher than before.(ABSTRACT TRUNCATED AT 400 WORDS)
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