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De Falla V, Figueroa F, Michalski J, van Rheenen J, Gay H, Ruiz Furlan E, Kihn A, Hugo G, Sobrevilla L, Garcia M, Davila S, Powderly W, Velarde A, Sun B, Lee K, Huang Y, Ma K, Najera K, García C, Reyes F, Ixquiac M, Henke L. Quality of Life of Patients Treated with Radiotherapy in an Upper Middle-Income Country. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1698] [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: 12/01/2022]
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Sun Q, Tripathi V, Yoon JH, Singh D, Hao Q, Min KW, Davila S, Zealy R, Li X, Polycarpou-Schwarz M, Lehrmann E, Zhang Y, Becker K, Freier S, Zhu Y, Diederichs S, Prasanth S, Lal A, Gorospe M, Prasanth K. MIR100 host gene-encoded lncRNAs regulate cell cycle by modulating the interaction between HuR and its target mRNAs. Nucleic Acids Res 2018; 46:10405-10416. [PMID: 30102375 PMCID: PMC6212728 DOI: 10.1093/nar/gky696] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 07/12/2018] [Accepted: 07/23/2018] [Indexed: 12/15/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) regulate vital biological processes, including cell proliferation, differentiation and development. A subclass of lncRNAs is synthesized from microRNA (miRNA) host genes (MIRHGs) due to pre-miRNA processing, and are categorized as miRNA-host gene lncRNAs (lnc-miRHGs). Presently, the cellular function of most lnc-miRHGs is not well understood. We demonstrate a miRNA-independent role for a nuclear-enriched lnc-miRHG in cell cycle progression. MIR100HG produces spliced and stable lncRNAs that display elevated levels during the G1 phase of the cell cycle. Depletion of MIR100HG-encoded lncRNAs in human cells results in aberrant cell cycle progression without altering the levels of miRNA encoded within MIR100HG. Notably, MIR100HG interacts with HuR/ELAVL1 as well as with several HuR-target mRNAs. Further, MIR100HG-depleted cells show reduced interaction between HuR and three of its target mRNAs, indicating that MIR100HG facilitates interaction between HuR and target mRNAs. Our studies have unearthed novel roles played by a MIRHG-encoded lncRNA in regulating RNA binding protein activity, thereby underscoring the importance of determining the function of several hundreds of lnc-miRHGs that are present in human genome.
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Affiliation(s)
- Qinyu Sun
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S Goodwin Avenue, Urbana, IL 61801, USA
| | - Vidisha Tripathi
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S Goodwin Avenue, Urbana, IL 61801, USA
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
- Laboratory of Genetics and Genomics, National Institute of Aging-Intramural Research program, NIH, Baltimore, MD 21224, USA
| | - Deepak K Singh
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S Goodwin Avenue, Urbana, IL 61801, USA
| | - Qinyu Hao
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S Goodwin Avenue, Urbana, IL 61801, USA
| | - Kyung-Won Min
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sylvia Davila
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Richard W Zealy
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Xiao Ling Li
- Regulatory RNAs and Cancer Section, Genetics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Maria Polycarpou-Schwarz
- Division of RNA Biology and Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany
| | - Elin Lehrmann
- Laboratory of Genetics and Genomics, National Institute of Aging-Intramural Research program, NIH, Baltimore, MD 21224, USA
| | - Yongqing Zhang
- Laboratory of Genetics and Genomics, National Institute of Aging-Intramural Research program, NIH, Baltimore, MD 21224, USA
| | - Kevin G Becker
- Laboratory of Genetics and Genomics, National Institute of Aging-Intramural Research program, NIH, Baltimore, MD 21224, USA
| | | | - Yuelin Zhu
- Molecular Genetics Section, CCR, NCI, NIH, Bethesda, MD, USA
| | - Sven Diederichs
- Division of RNA Biology and Cancer, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69120 Heidelberg, Germany
- Division of Cancer Research, Dept. of Thoracic Surgery, Medical Center – University of Freiburg, Faculty of Medicine, University of Freiburg, Breisacher Str. 115, 79106 Freiburg & German Cancer Consortium (DKTK), Freiburg, Germany
| | - Supriya G Prasanth
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S Goodwin Avenue, Urbana, IL 61801, USA
| | - Ashish Lal
- Regulatory RNAs and Cancer Section, Genetics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute of Aging-Intramural Research program, NIH, Baltimore, MD 21224, USA
| | - Kannanganattu V Prasanth
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, 601 S Goodwin Avenue, Urbana, IL 61801, USA
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Min KW, Zealy RW, Davila S, Fomin M, Cummings JC, Makowsky D, Mcdowell CH, Thigpen H, Hafner M, Kwon SH, Georgescu C, Wren JD, Yoon JH. Profiling of m6A RNA modifications identified an age-associated regulation of AGO2 mRNA stability. Aging Cell 2018; 17:e12753. [PMID: 29573145 PMCID: PMC5946072 DOI: 10.1111/acel.12753] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [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] [Accepted: 01/29/2018] [Indexed: 11/30/2022] Open
Abstract
Gene expression is dynamically regulated in a variety of mammalian physiologies. During mammalian aging, there are changes that occur in protein expression that are highly controlled by the regulatory steps in transcription, post-transcription, and post-translation. Although there are global profiles of human transcripts during the aging processes available, the mechanism(s) by which transcripts are differentially expressed between young and old cohorts remains unclear. Here, we report on N6-methyladenosine (m6A) RNA modification profiles of human peripheral blood mononuclear cells (PBMCs) from young and old cohorts. An m6A RNA profile identified a decrease in overall RNA methylation during the aging process as well as the predominant modification on proteincoding mRNAs. The m6A-modified transcripts tend to be more highly expressed than nonmodified ones. Among the many methylated mRNAs, those of DROSHA and AGO2 were heavily methylated in young PBMCs which coincided with a decreased steady-state level of AGO2 mRNA in the old PBMC cohort. Similarly, downregulation of AGO2 in proliferating human diploid fibroblasts (HDFs) also correlated with a decrease in AGO2 mRNA modifications and steady-state levels. In addition, the overexpression of RNA methyltransferases stabilized AGO2 mRNA but not DROSHA and DICER1 mRNA in HDFs. Moreover, the abundance of miRNAs also changed in the young and old PBMCs which are possibly due to a correlation with AGO2 expression as observed in AGO2-depleted HDFs. Taken together, we uncovered the role of mRNA methylation on the abundance of AGO2 mRNA resulting in the repression of miRNA expression during the process of human aging.
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Affiliation(s)
- Kyung-Won Min
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - Richard W. Zealy
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - Sylvia Davila
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - Mikhail Fomin
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - James C. Cummings
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - Daniel Makowsky
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - Catherine H. Mcdowell
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - Haley Thigpen
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
| | - Markus Hafner
- Laboratory of Muscle Stem Cells and Gene Regulation; National Institute of Arthritis and Musculoskeletal and Skin Diseases; Bethesda MD USA
| | - Sang-Ho Kwon
- Department of Medicine; Division of Nephrology; Medical University of South Carolina; Charleston SC USA
| | - Constantin Georgescu
- Arthritis and Clinical Immunology Research Program; Division of Genomics and Data Sciences; Oklahoma Medical Research Foundation; Oklahoma City OK USA
| | - Jonathan D. Wren
- Arthritis and Clinical Immunology Research Program; Division of Genomics and Data Sciences; Oklahoma Medical Research Foundation; Oklahoma City OK USA
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology; Medical University of South Carolina; Charleston SC USA
- Laboratory of Genetics; National Institute on Aging-Intramural Research Program, NIH; Baltimore MD USA
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Zealy RW, Fomin M, Davila S, Makowsky D, Thigpen H, McDowell CH, Cummings JC, Lee ES, Kwon SH, Min KW, Yoon JH. Long noncoding RNA complementarity and target transcripts abundance. Biochim Biophys Acta Gene Regul Mech 2018; 1861:224-234. [PMID: 29421307 DOI: 10.1016/j.bbagrm.2018.02.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 02/02/2018] [Accepted: 02/02/2018] [Indexed: 01/05/2023]
Abstract
Eukaryotic mRNA metabolism regulates its stability, localization, and translation using complementarity with counter-part RNAs. To modulate their stability, small and long noncoding RNAs can establish complementarity with their target mRNAs. Although complementarity of small interfering RNAs and microRNAs with target mRNAs has been studied thoroughly, partial complementarity of long noncoding RNAs (lncRNAs) with their target mRNAs has not been investigated clearly. To address that research gap, our lab investigated whether the sequence complementarity of two lncRNAs, lincRNA-p21 and OIP5-AS1, influenced the quantity of target RNA expression. We predicted a positive correlation between lncRNA complementarity and target mRNA quantity. We confirmed this prediction using RNA affinity pull down, microarray, and RNA-sequencing analysis. In addition, we utilized the information from this analysis to compare the quantity of target mRNAs when two lncRNAs, lincRNA-p21 and OIP5-AS1, are depleted by siRNAs. We observed that human and mouse lincRNA-p21 regulated target mRNA abundance in complementarity-dependent and independent manners. In contrast, affinity pull down of OIP5-AS1 revealed that changes in OIP5-AS1 expression influenced the amount of some OIP5-AS1 target mRNAs and miRNAs, as we predicted from our sequence complementarity assay. Altogether, the current study demonstrates that partial complementarity of lncRNAs and mRNAs (even miRNAs) assist in determining target RNA expression and quantity.
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Affiliation(s)
- Richard W Zealy
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Mikhail Fomin
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sylvia Davila
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Daniel Makowsky
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Haley Thigpen
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Catherine H McDowell
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - James C Cummings
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Edward S Lee
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sang-Ho Kwon
- Department of Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Kyung-Won Min
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA.
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; Laboratory of Genetics, National Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA.
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Min KW, Jo MH, Shin S, Davila S, Zealy RW, Kang SI, Lloyd LT, Hohng S, Yoon JH. AUF1 facilitates microRNA-mediated gene silencing. Nucleic Acids Res 2017; 45:6064-6073. [PMID: 28334781 PMCID: PMC5449627 DOI: 10.1093/nar/gkx149] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [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: 05/18/2016] [Accepted: 02/21/2017] [Indexed: 01/02/2023] Open
Abstract
Eukaryotic mRNA decay is tightly modulated by RNA-binding proteins (RBPs) and microRNAs (miRNAs). RBP AU-binding factor 1 (AUF1) has four isoforms resulting from alternative splicing and is critical for miRNA-mediated gene silencing with a distinct preference of target miRNAs. Previously, we have shown that AUF1 facilitates miRNA loading to Argonaute 2 (AGO2), the catalytic component of the RNA-induced silencing complex. Here, we further demonstrate that depletion of AUF1 abolishes the global interaction of miRNAs and AGO2. Single-molecule analysis revealed that AUF1 slowed down assembly of AGO2-let-7b-mRNA complex unexpectedly. However, target mRNAs recognized by both miRNA and AUF1 are less abundant upon AUF1 overexpression implying that AUF1 is a decay-promoting factor influencing multiple steps in AGO2-miRNA-mediated mRNA decay. Our findings indicate that AUF1 functions in promoting miRNA-mediated mRNA decay globally.
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Affiliation(s)
- Kyung-Won Min
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Myung Hyun Jo
- Department of Physics and Astronomy, Institute of Applied Physics, National Center for Creative Research Initiatives, Seoul National University, Seoul 151-747, Korea
| | - Soochul Shin
- Department of Physics and Astronomy, Institute of Applied Physics, National Center for Creative Research Initiatives, Seoul National University, Seoul 151-747, Korea
| | - Sylvia Davila
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Richard W Zealy
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Soo Im Kang
- Department of Plastic Surgery, Seoul National University Bundang Hospital, Seongnam 13605, Korea
| | - Lawson T Lloyd
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sungchul Hohng
- Department of Physics and Astronomy, Institute of Applied Physics, National Center for Creative Research Initiatives, Seoul National University, Seoul 151-747, Korea
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA.,Laboratory of Genetics, National Institute on Aging-Intramural Research Program, NIH, Baltimore, MD 21224, USA
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6
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Min KW, Davila S, Zealy RW, Lloyd LT, Lee IY, Lee R, Roh KH, Jung A, Jemielity J, Choi EJ, Chang JH, Yoon JH. eIF4E phosphorylation by MST1 reduces translation of a subset of mRNAs, but increases lncRNA translation. Biochim Biophys Acta Gene Regul Mech 2017; 1860:761-772. [PMID: 28487214 DOI: 10.1016/j.bbagrm.2017.05.002] [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] [Key Words] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 05/03/2017] [Accepted: 05/05/2017] [Indexed: 10/19/2022]
Abstract
Post-transcriptional gene regulation is an important step in eukaryotic gene expression. The last step to govern production of nascent peptides is during the process of mRNA translation. mRNA translation is controlled by many translation initiation factors that are susceptible to post-translational modifications. Here we report that one of the translation initiation factors, eIF4E, is phosphorylated by Mammalian Ste20-like kinase (MST1). Upon phosphorylation, eIF4E weakly interacts with the 5' CAP to inhibit mRNA translation. Simultaneously, active polyribosome is more associated with long noncoding RNAs (lncRNAs). Moreover, the linc00689-derived micropeptide, STORM (Stress- and TNF-α-activated ORF Micropeptide), is triggered by TNF-α-induced and MST1-mediated eIF4E phosphorylation, which exhibits molecular mimicry of SRP19 and, thus, competes for 7SL RNA. Our findings have uncovered a novel function of MST1 in mRNA and lncRNA translation by direct phosphorylation of eIF4E. This novel signaling pathway will provide new platforms for regulation of mRNA translation via post-translational protein modification.
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Affiliation(s)
- Kyung-Won Min
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Sylvia Davila
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Richard W Zealy
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Lawson T Lloyd
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - In Young Lee
- Laboratory of Cell Death and Human Diseases, Department of Life Sciences, School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Rumi Lee
- Laboratory of Cell Death and Human Diseases, Department of Life Sciences, School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Kyung Hye Roh
- Laboratory of Cell Death and Human Diseases, Department of Life Sciences, School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Ahjin Jung
- Department of Biology Education, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Jacek Jemielity
- Centre of New Technologies, University of Warsaw, S. Banacha 2c, 02-097 Warsaw, Poland
| | - Eui-Ju Choi
- Laboratory of Cell Death and Human Diseases, Department of Life Sciences, School of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Jeong Ho Chang
- Department of Biology Education, Kyungpook National University, Daegu 41566, Republic of Korea.
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; Laboratory of Genetics, National Institute on Aging-Intramural Research Program, NIH, Baltimore, MD 21224, USA.
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7
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Zealy RW, Wrenn SP, Davila S, Min KW, Yoon JH. microRNA-binding proteins: specificity and function. WIREs RNA 2017; 8. [DOI: 10.1002/wrna.1414] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 12/14/2016] [Accepted: 12/20/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Richard W. Zealy
- Department of Biochemistry and Molecular Biology, College of Medicine; Medical University of South Carolina; Charleston SC USA
| | - Samuel P. Wrenn
- Department of Biochemistry and Molecular Biology, College of Medicine; Medical University of South Carolina; Charleston SC USA
| | - Sylvia Davila
- Department of Biochemistry and Molecular Biology, College of Medicine; Medical University of South Carolina; Charleston SC USA
| | - Kyung-Won Min
- Department of Biochemistry and Molecular Biology, College of Medicine; Medical University of South Carolina; Charleston SC USA
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, College of Medicine; Medical University of South Carolina; Charleston SC USA
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8
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Sun ZJ, Ng KH, Liao P, Zhang Y, Ng JL, Liu ID, Tan PH, Chong SSC, Chan YH, Liu J, Davila S, Heng CK, Jordan SC, Soong TW, Yap HK. Genetic Interactions Between TRPC6 and NPHS1 Variants Affect Posttransplant Risk of Recurrent Focal Segmental Glomerulosclerosis. Am J Transplant 2015; 15:3229-38. [PMID: 26147534 DOI: 10.1111/ajt.13378] [Citation(s) in RCA: 16] [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: 03/13/2015] [Revised: 04/20/2015] [Accepted: 05/05/2015] [Indexed: 01/25/2023]
Abstract
Individuals with TRPC6 mutations have variable phenotypes, ranging from healthy carrier to focal segmental glomerulosclerosis (FSGS) leading to renal failure. Here, we describe a family where six members had a novel TRPC6 p.R68W (c.202C>T) mutation, two of whom had renal failure from FSGS, and one had proteinuria. One healthy carrier donated a kidney to her sister. Both donor and recipient had no proteinuria at 20 years posttransplant. Two synonymous NPHS1 polymorphisms, rs2285450 (c.294C>T) and rs437168 (c.2289C>T) segregated with renal failure in this family. These variants had higher allele frequencies in 97 unrelated patients with nephrotic syndrome or FSGS compared to 224 controls. Using patch-clamp experiments in HEK293 and podocytes, we showed that the p.R68W mutation increased TRPC6 current amplitudes, which may be explained by enhanced TRPC6 surface expression. Additionally, while wild-type nephrin suppressed TRPC6 currents, this ability was lost in the presence of NPHS1 c.294C>T polymorphism. When cells were transfected according to combined TRPC6 and NPHS1 genotypes in the family, those representing the donor had lower TRPC6 currents than cells representing the recipient, suggesting that interactions between TRPC6 and NPHS1 variants could possibly account for the variable penetrance of TRPC6 mutations and the absence of recurrence in the graft.
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Affiliation(s)
- Z J Sun
- Department of Pediatrics, National University of Singapore, Singapore, Singapore
| | - K H Ng
- Department of Pediatrics, National University of Singapore, Singapore, Singapore.,Khoo Teck Puat - National University Children's Medical Institute, National University Health System, Singapore, Singapore
| | - P Liao
- Department of Research, National Neuroscience Institute, Singapore, Singapore.,Department of Physiology, National University of Singapore, Singapore, Singapore
| | - Y Zhang
- Department of Pediatrics, National University of Singapore, Singapore, Singapore
| | - J L Ng
- Khoo Teck Puat - National University Children's Medical Institute, National University Health System, Singapore, Singapore.,Department of Pediatrics, National University of Singapore, Singapore, Singapore
| | - I D Liu
- Khoo Teck Puat - National University Children's Medical Institute, National University Health System, Singapore, Singapore
| | - P H Tan
- Department of Pathology, Singapore General Hospital, Singapore, Singapore
| | - S S C Chong
- Department of Pediatrics, National University of Singapore, Singapore, Singapore
| | - Y H Chan
- Biostatistics Unit, National University of Singapore, Singapore, Singapore
| | - J Liu
- Human Genetics, Genome Institute of Singapore, Singapore, Singapore
| | - S Davila
- Human Genetics, Genome Institute of Singapore, Singapore, Singapore
| | - C K Heng
- Khoo Teck Puat - National University Children's Medical Institute, National University Health System, Singapore, Singapore.,Department of Pediatrics, National University of Singapore, Singapore, Singapore
| | - S C Jordan
- David Geffen School of Medicine at UCLA, Los Angeles, CA.,Cedars-Sinai Medical Center, Los Angeles, CA
| | - T W Soong
- Department of Physiology, National University of Singapore, Singapore, Singapore
| | - H K Yap
- Khoo Teck Puat - National University Children's Medical Institute, National University Health System, Singapore, Singapore.,Department of Pediatrics, National University of Singapore, Singapore, Singapore
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Vranes J, Davila S, Stipesevic-Rakamaric I, Retkovac B, Koscak I, Horvat J. Hepatitis C virus genotypes in population of prisoners and intravenous drug addicts in Croatia. Int J Infect Dis 2014. [DOI: 10.1016/j.ijid.2014.03.1229] [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: 11/17/2022] Open
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10
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Khor CC, Davila S, Shimizu C, Sheng S, Matsubara T, Suzuki Y, Newburger JW, Baker A, Burgner D, Breunis W, Kuijpers T, Wright VJ, Levin M, Hibberd ML, Burns JC. Genome-wide linkage and association mapping identify susceptibility alleles in ABCC4 for Kawasaki disease. J Med Genet 2011; 48:467-72. [DOI: 10.1136/jmg.2010.086611] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Davila S, Froeling FEM, Tan A, Bonnard C, Boland GJ, Snippe H, Hibberd ML, Seielstad M. New genetic associations detected in a host response study to hepatitis B vaccine. Genes Immun 2010; 11:232-8. [PMID: 20237496 DOI: 10.1038/gene.2010.1] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The immune response to hepatitis B vaccination differs greatly among individuals, with 5-10% of healthy people failing to produce protective levels of antibodies. Several factors have been implicated in determining this response, chiefly individual genetic variation and age. Aiming to identify genes involved in the response to hepatitis B vaccination, a two-stage investigation of 6091 single-nucleotide polymorphisms (SNPs) in 914 immune genes was performed in an Indonesian cohort of 981 individuals showing normal levels of anti-HBs versus 665 individuals displaying undetectable levels of anti-HBs 18 months after initial dose of the vaccine. Of 275 SNPs identified in the first stage (476 normal/372 nonresponders) with P<0.05, significant associations were replicated for 25 polymorphisms in 15 genes (503 normal/295 nonresponders). We validated previous findings (HLA-DRA, rs5000563, P-value combined=5.57 x 10(-10); OR (95%CI)=0.61 (0.52-0.71)). In addition, we detected a new association outside of the human leukocyte antigen loci region that passed correction for multiple testing. This SNP is in the 3' downstream region of FOXP1, a transcription factor involved in B-cell development (P-value combined=9.2 x 10(-6); OR (95%CI)=1.38 (1.2-1.6)).These findings might help to understand the biological reasons behind vaccine failure and other aspects of variation in the immune responses of healthy individuals.
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Affiliation(s)
- S Davila
- Genome Institute of Singapore, Singapore
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12
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Davila S, Augustin G, Premuzic I, Antoljak T, Dobric I, Jarza-Davila N. Perforated retroperitoneal retrofascial sigmoid diverticulitis as a cause of osteomyelitis and septic necrosis of the acetabulum and proximal femur. Acta Gastroenterol Belg 2010; 73:71-73. [PMID: 20458856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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13
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Grijalva MJ, Palomeque-Rodríguez FS, Costales JA, Davila S, Arcos-Teran L. High household infestation rates by synanthropic vectors of Chagas disease in southern Ecuador. J Med Entomol 2005; 42:68-74. [PMID: 15691011 DOI: 10.1093/jmedent/42.1.68] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Entomological surveys were conducted in five rural communities (138 domiciliary units [DUs]) in the southern Andes of Ecuador. Adobe walls and ceramic tile roofs were predominant construction materials. A 35% house infestation rate with Panstrongylus chinai (Del Ponte, 1929) (0.7%), Panstrongylus rufotuberculatus (Champion, 1899) (0.7%), Rhodnius ecuadoriensis (Lent & León, 1958) (27%), and/or Triatoma carrioni (Larrousse, 1926) (7%) was found. Adults and nymphs of R. ecuadoriensis and T. carrioni were found in intradomiciliary and peridomiciliary areas. Breeding triatomine colonies were present in 85% of infested DUs, and the average insect crowding was 52+/-113 triatomine bugs per infested house. T. cruzi-like organisms were found by microscopic examination in the feces or hindgut but not the salivary glands of 4% of examined R. ecuadoriensis and 12% T. carrioni. Serological tests detected a general anti-T. cruzi antibody seroprevalence of 3.9% (n = 1136). Only 2% of individuals had heard of Chagas disease, and although triatomines were reported as a major nuisance by the population they were not considered vectors of disease. Additional baseline field research is needed for the design and implementation of a Chagas disease control program in the region.
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Affiliation(s)
- M J Grijalva
- Tropical Disease Institute, Biomedical Sciences Department, Ohio University College of Osteopathic Medicine, Athens, OH 45701, USA
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Abstract
BACKGROUND Clavicular pseudoarthrosis is a rare condition, the management of which should not be underestimated because it requires re-operations and causes serious morbidity or even a lifelong handicap. PATIENTS AND METHODS We reviewed a series of 13 patients with non-union of a clavicular fracture who underwent a surgical treatment from the year 1993 to 2002. Twelve fractures were a result of trauma and one was a result of osteomyelitis. Twelve non-unions were located in the middle third of the clavicle, while only one was in the lateral third. Seven non-unions were atrophic and six were hypertrophic. The average age of patients was 33 years (range: 14-52 years). Average post-operative follow-up time was 4.7 years (range: 1-11 years). In the study, we used intramedullar osteosynthesis such as Kirschner wire, different kinds of plates and screws, followed by autogeneous or heterogeneous bone grafting. Constant scoring system was used to evaluate mobility and strength of the upper extremity. RESULTS AND CONCLUSION A single operation was adequate in seven cases; two operations were adequate in four cases and three operations were adequate in one case. Fractures healed properly in 11 cases, but in some cases mild-to-moderate symptoms still persisted post-operatively. The results of 13 patients who underwent various surgical procedures show that a reconstruction plate should be the first choice of osteosynthesis, followed by a dynamic-compression plate, and a semitubular plate should be the last choice. To conclude, with this kind of treatment of clavicular pseudoarthrosis, we achieved a high degree of patient satisfaction, as well as objective improvements in status reports.
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Affiliation(s)
- I Petrovic
- Clinical Hospital Center "Rebro", Surgical Clinic, Department of Traumatology and Bone and Joint Surgery, Kispatićeva 12, 10 000 Zagreb, Croatia.
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Rodriguez JF, Melendez M, Blanco R, Rosario O, Delgado W, Davila S, Casiano D, Garcia H, Mendez O, Marrero S, Costas P, Gonzalez C, Perez C, Rodriguez JR, Santana J. 62 REDUCTION OF ZDV-TP AFTER 12 WEEKS OF TREATMENT WITH REBETRON® IN HIV-HCV CO-INFECTED PATIENTS. J Investig Med 2004. [DOI: 10.1136/jim-52-suppl2-136] [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: 11/03/2022]
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Persu A, Stoenoiu MS, Messiaen T, Davila S, Robino C, El-Khattabi O, Mourad M, Horie S, Feron O, Balligand JL, Wattiez R, Pirson Y, Chauveau D, Lens XM, Devuyst O. Modifier effect of ENOS in autosomal dominant polycystic kidney disease. Hum Mol Genet 2002; 11:229-41. [PMID: 11823442 DOI: 10.1093/hmg/11.3.229] [Citation(s) in RCA: 124] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A significant phenotypical variability is observed in autosomal dominant polycystic kidney disease (ADPKD). ADPKD is associated with altered endothelial-dependent vasodilation and decreased vascular production of nitric oxide (NO). Thus, ENOS, the gene coding for the endothelial nitric oxide synthase (eNOS), could have a modifier effect in ADPKD. In order to test this hypothesis, we genotyped 173 unrelated ADPKD patients from Belgium and the north of France for the Glu298Asp, intron 4 VNTR and T-786C polymorphisms of ENOS and looked for their influence on the age at end-stage renal disease (ESRD). In males (n = 93), the Glu298Asp polymorphism was associated with a lower age at ESRD (Glu/Asp + Asp/Asp: 49.0 +/- 1.2 years, n = 53; Glu/Glu: 53.5 +/- 1.5 years, n = 40; simple regression, P = 0.02; multiple regression, P = 0.006). This effect was confirmed in a subset of males linked to PKD1 and reaching ESRD before age 45, and by a cumulative renal survival analysis in PKD1-linked families. Further studies demonstrated that NO synthase (NOS) activity was decreased in renal artery samples from ADPKD males harbouring the Asp298 allele, in association with post-translational modifications and partial cleavage of eNOS. No significant effect of the other polymorphisms was found in males, and no polymorphism influenced the age at ESRD in females. In conclusion, the frequent Glu298Asp polymorphism of ENOS is associated with a 5 year lower mean age at ESRD in this subset of ADPKD males. This effect could be due to a decreased NOS activity and a partial cleavage of eNOS, leading to a further decrease in the vascular production of NO.
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Affiliation(s)
- A Persu
- Division of Nephrology, Université catholique de Louvain Medical School, Brussels, Belgium
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Davila S, Mikulić D. War injuries of the talus. Mil Med 2001; 166:705-7. [PMID: 11515321] [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: 02/21/2023] Open
Abstract
Twenty-eight patients with war fractures of the talus were reviewed to determine the incidence of infection and late functional results. The average age of our patients was 37.5 years. Twenty-one injuries were explosive fractures that resulted from shell fragments or mines; seven fractures resulted from gunshot missiles. Seven patients had isolated talus injuries, whereas 21 patients had associated fractures of other bones of the foot or lower leg. All patients were initially treated with debridement, tetanus immunization, intravenous antibiotics, and stabilization, either with cast immobilization or an external fixator. Five days after injury, wound cultures were positive in 25 of 28 feet. Infection was eventually eradicated in all patients, allowing for soft tissue coverage. One patient eventually required a below-knee amputation. The patients were reviewed for functional outcome at 36 to 60 months after injury. Most patients reported a certain degree of residual complaints. The overall result can be considered excellent in only one patient.
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Affiliation(s)
- S Davila
- Clinical Medical Center-Zagreb, Department of Surgery, Kispatićeva 12, 10000 Zagreb, Croatia
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Davila S, Crkvenac A, Mikulić D, Popović L, Antabak A. [Analysis of results of surgical treatment of malleolar fractures]. Lijec Vjesn 2001; 123:59-63. [PMID: 11488217] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Late results of operatively treated malleolar fractures were analyzed. 101 patients were operated on, 58 (57.4%) were available for follow-up. There were 5 patients with A-type fractures according to Weber's classification, 28 with type-B and 25 with type-C fractures. One year or more after the treatment the patients were evaluated on follow-up checks where ranges of ankle dorsiflexion, plantar extension, pronation and supination were recorded, circumference of the injured ankle was measured and the patients were interviewed about subjective complaints. Normal range of motion of the injured ankle (normal range of motion represented by the healthy ankle) was found only in patients with type-A fractures while in other two groups the patients had significantly decreased motility of the injured ankle (P < 0.05). The circumference of the injured ankle was increased in most patients with 25.9% patients ankles being 20 mm or more thicker than the uninjured side. Only seven patients (12.1%) were without subjective complaints while other patients experienced pain with load, pain with weather changes, swelling of the ankle etc. Malleolar fractures still represent a significant surgical problem and only an early operation, anatomic reduction and fixation as well as proper rehabilitation guarantee good results.
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Affiliation(s)
- S Davila
- Klinika za kirurgiju Medicinskog fakulteta i KBC-a Zagreb, Kispatićeva 12, 10000 Zagreb
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Davila S, Mikulić D, Haiman M, Zagar Z, Popović L, Antabak A. [Treatment of pseudarthroses of the olecranon with the anatomical hook plate]. Lijec Vjesn 2000; 122:226-8. [PMID: 11210818] [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] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
We report the results in seven patients treated surgically for nonunion of the olecranon. Four nonunions occurred after primary treatment with tension band wiring and three nonunions occurred after open reduction internal fixation with plates and screws or lag screws only. All patients were treated with cancellous bone grafting and open reduction internal fixation using anatomical hook plates. All nonunions united within 6 months after the treatment. In all patients the range of motion of the elbow improved significantly.
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Affiliation(s)
- S Davila
- Klinika za kirurgiju Medicinskog fakulteta i KBC-a Zagreb, Kispatićeva 12, 10000 Zagreb
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Hancević J, Turcić J, Davila S, Livaković M, Antoljak T, Matović M, Spoljar S. [Views on war injuries of the locomotor system]. Lijec Vjesn 1991; 113:257-8. [PMID: 1762493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- J Hancević
- Klinika za kirurgiju, Medicinski fakultet Sveucilista u Zagrebu
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Radanović B, Simunić S, Stojanović J, Potocki K, Hancević J, Davila S. [Embolization therapy of a femoral hemangiolipoma with intra-osseous invasion]. Aktuelle Traumatol 1990; 20:267-71. [PMID: 1978975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The paper presents the case of a gigantic inoperable hemangiolipoma of the right upper leg with infiltration into femur. Performed embolization therapy resulted in satisfactory subjective and objective improvement.
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Affiliation(s)
- B Radanović
- Institut für klinische Radiologie und Chirurgische Klinik am Klinikum Rebro der Universität Zagreb
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Cubeddu LX, Hoffmann IS, Davila S, Escontrelas C, Morales C, Rios A. Effects of propranolol, clonidine and hydrochlorothiazide treatment and abrupt discontinuation on central and peripheral noradrenergic activity in essential hypertension. Life Sci 1986; 39:2463-74. [PMID: 3540504 DOI: 10.1016/0024-3205(86)90489-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
This study was undertaken to investigate further the CNS actions of commonly employed antihypertensive drugs. Measurements of cerebrospinal fluid (CSF) and plasma catecholamines (CA) were made in an attempt to estimate the activity of central and peripheral noradrenergic neurons during treatment with or after abrupt discontinuation of treatment with clonidine (CLO), propranolol (PRO), hydrochlorothiazide (HCTZ) or placebo, in patients with essential hypertension. A randomized, parallel, placebo-controlled, single-blind design was employed. BP reductions equal to or greater than 10 mmHg were observed with CLO (0.36 +/- 0.07 mg daily), PRO (160 mg +/- 0 mg daily) or HCTZ (70 +/- 12 mg daily). CLO reduced plasma norepinephrine (NE) by 64% and PRO increased it by 25%. Neither HCTZ nor placebo modified plasma NE. Plasma renin activity (PRA) was reduced by PRO (51%, P less than 0.01) and CLO (35%, P less than 0.05). CSF-NE levels (pg/ml) were significantly lower in the CLO group (CLO: 175 +/- 23; PRO: 278 +/- 35; HCTZ: 255 +/- 34; placebo: 203 +/- 7).
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Borcić V, Ignjatovski B, Davila S. [Infection as a cause of complications in biliary surgery. (Acute suppurative cholangitis, biliary sepsis, and endotoxemia)]. Acta Chir Iugosl 1980; 27 Suppl 1:177-184. [PMID: 6775485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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Davila S, Dolgos K, Bolcić-Wickerhauser J. [A comparative clinical trial of the effects of halothane anesthesia and of neuroleptanalgesia on liver function tests (author's transl)]. Lijec Vjesn 1979; 101:203-6. [PMID: 481065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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