1
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Lim Y. Transcription factors in microcephaly. Front Neurosci 2023; 17:1302033. [PMID: 38094004 PMCID: PMC10716367 DOI: 10.3389/fnins.2023.1302033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/06/2023] [Indexed: 02/01/2024] Open
Abstract
Higher cognition in humans, compared to other primates, is often attributed to an increased brain size, especially forebrain cortical surface area. Brain size is determined through highly orchestrated developmental processes, including neural stem cell proliferation, differentiation, migration, lamination, arborization, and apoptosis. Disruption in these processes often results in either a small (microcephaly) or large (megalencephaly) brain. One of the key mechanisms controlling these developmental processes is the spatial and temporal transcriptional regulation of critical genes. In humans, microcephaly is defined as a condition with a significantly smaller head circumference compared to the average head size of a given age and sex group. A growing number of genes are identified as associated with microcephaly, and among them are those involved in transcriptional regulation. In this review, a subset of genes encoding transcription factors (e.g., homeobox-, basic helix-loop-helix-, forkhead box-, high mobility group box-, and zinc finger domain-containing transcription factors), whose functions are important for cortical development and implicated in microcephaly, are discussed.
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Affiliation(s)
- Youngshin Lim
- Department of Pathology and Laboratory Medicine, Cedars-Sinai Medical Center, Los Angeles, CA, United States
- Department of Biomedical Science Education, Charles R. Drew University of Medicine and Science, Los Angeles, CA, United States
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2
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Nishio Y, Kato K, Tran Mau-Them F, Futagawa H, Quélin C, Masuda S, Vitobello A, Otsuji S, Shawki HH, Oishi H, Thauvin-Robinet C, Takenouchi T, Kosaki K, Takahashi Y, Saitoh S. Gain-of-function MYCN causes a megalencephaly-polydactyly syndrome manifesting mirror phenotypes of Feingold syndrome. HGG ADVANCES 2023; 4:100238. [PMID: 37710961 PMCID: PMC10550848 DOI: 10.1016/j.xhgg.2023.100238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 09/08/2023] [Accepted: 09/08/2023] [Indexed: 09/16/2023] Open
Abstract
MYCN, a member of the MYC proto-oncogene family, regulates cell growth and proliferation. Somatic mutations of MYCN are identified in various tumors, and germline loss-of-function variants are responsible for Feingold syndrome, characterized by microcephaly. In contrast, one megalencephalic patient with a gain-of-function variant in MYCN, p.Thr58Met, has been reported, and additional patients and pathophysiological analysis are required to establish the disease entity. Herein, we report two unrelated megalencephalic patients with polydactyly harboring MYCN variants of p.Pro60Leu and Thr58Met, along with the analysis of gain-of-function and loss-of-function Mycn mouse models. Functional analyses for MYCN-Pro60Leu and MYCN-Thr58Met revealed decreased phosphorylation at Thr58, which reduced protein degradation mediated by FBXW7 ubiquitin ligase. The gain-of-function mouse model recapitulated the human phenotypes of megalencephaly and polydactyly, while brain analyses revealed excess proliferation of intermediate neural precursors during neurogenesis, which we determined to be the pathomechanism underlying megalencephaly. Interestingly, the kidney and female reproductive tract exhibited overt morphological anomalies, possibly as a result of excess proliferation during organogenesis. In conclusion, we confirm an MYCN gain-of-function-induced megalencephaly-polydactyly syndrome, which shows a mirror phenotype of Feingold syndrome, and reveal that MYCN plays a crucial proliferative role, not only in the context of tumorigenesis, but also organogenesis.
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Affiliation(s)
- Yosuke Nishio
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan; Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan; Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya 464-8601, Japan
| | - Kohji Kato
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan; Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan; Department of Genetics, Research Institute of Environmental Medicine, Nagoya University, Nagoya 464-8601, Japan.
| | - Frederic Tran Mau-Them
- Unité Fonctionnelle 6254 d'Innovation en Diagnostique Génomique des Maladies Rares, Pôle de Biologie, CHU Dijon Bourgogne, 21070 Dijon, France; INSERM UMR1231 GAD, 21000 Dijon, France
| | - Hiroshi Futagawa
- Department of Clinical Genetics, Tokyo Metropolitan Children's Medical Center, Tokyo 183-8561, Japan
| | - Chloé Quélin
- Service de Génétique Clinique, CLAD Ouest, CHU Rennes, Hôpital Sud, 35200 Rennes, France
| | - Saori Masuda
- Department of Hematology and Oncology, Tokyo Metropolitan Children's Medical Center, Tokyo 183-8561, Japan
| | - Antonio Vitobello
- Unité Fonctionnelle 6254 d'Innovation en Diagnostique Génomique des Maladies Rares, Pôle de Biologie, CHU Dijon Bourgogne, 21070 Dijon, France; INSERM UMR1231 GAD, 21000 Dijon, France
| | - Shiomi Otsuji
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan
| | - Hossam H Shawki
- Department of Comparative and Experimental Medicine, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya 467-8601, Japan
| | - Hisashi Oishi
- Department of Comparative and Experimental Medicine, Nagoya City University Graduate School of Medical Sciences and Medical School, Nagoya 467-8601, Japan
| | - Christel Thauvin-Robinet
- Unité Fonctionnelle 6254 d'Innovation en Diagnostique Génomique des Maladies Rares, Pôle de Biologie, CHU Dijon Bourgogne, 21070 Dijon, France; INSERM UMR1231 GAD, 21000 Dijon, France; Centre de Référence Maladies Rares "Anomalies du développement et syndromes malformatifs", Centre de Génétique, FHU TRANSLAD et Institut GIMI, CHU Dijon Bourgogne, 21070 Dijon, France
| | - Toshiki Takenouchi
- Department of Pediatrics, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo 160-8582, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan
| | - Shinji Saitoh
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan.
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3
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Gouveia I, Geraldo AF, Godinho C, Castedo S. Feingold syndrome type 1: a rare cause of fetal microcephaly (prenatal diagnosis). BMJ Case Rep 2023; 16:e254366. [PMID: 36889805 PMCID: PMC10008251 DOI: 10.1136/bcr-2022-254366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023] Open
Abstract
We report a case of fetal microcephaly found during the second trimester ultrasound and confirmed by further ultrasound scans and fetal MRI. The array comparative genomic hybridisation analysis of the fetus and the male parent showed a 1.5 Mb deletion overlapping the Feingold syndrome region, an autosomal dominant syndrome that can cause microcephaly, facial/hand abnormalities, mild neurodevelopmental delay and others. This case illustrates the need for a detailed investigation by a multidisciplinary team to provide prenatal counselling regarding a postnatal outcome to the parents and orient their decision towards the continuation or termination of pregnancy.
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Affiliation(s)
- Inês Gouveia
- Obstetrics and Gynecology, Centro Hospitalar de Vila Nova de Gaia Espinho EPE, Vila Nova de Gaia, Portugal
| | - Ana Filipa Geraldo
- Diagnostic Neuroradiology Unit, Radiology Department, Centro Hospitalar de Vila Nova de Gaia Espinho EPE, Vila Nova de Gaia, Portugal
| | - Cristina Godinho
- Obstetrics and Gynecology, Centro Hospitalar de Vila Nova de Gaia Espinho EPE, Vila Nova de Gaia, Portugal
| | - Sérgio Castedo
- Genetics Department of Faculty of Medicine, Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
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4
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Wu X, He X, Liu Q, Li H. The developmental miR-17-92 cluster and the Sfmbt2 miRNA cluster cannot rescue the abnormal embryonic development generated using obstructive epididymal environment-producing sperm in C57BL/6 J mice. Reprod Biol Endocrinol 2022; 20:164. [PMID: 36451157 PMCID: PMC9710060 DOI: 10.1186/s12958-022-01025-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 10/16/2022] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Sperm, during epididymal transit, acquires microRNAs(miRNAs), which are crucial for embryonic development. However, whether sperm miRNAs influenced by an obstructive epididymal environment affect embryonic development remains unknown. METHOD The sham operation and vasectomy were performed in C57BL/6 J mice to create the control group (CON) and the obstructive epididymal environment group(OEE) group, respectively. The morphology of the testis and epididymis was observed using hematoxylin and eosin staining (HE staining) to establish the OEE mice model. The sperm quality test, intracytoplasmic sperm injection (ICSI), and epididymosomes fusion were employed to observe the effect of the obstructive epididymal environment on sperm and resultant embryonic development. The alteration of the sperm small RNA (sRNA) profile was analyzed by sRNA sequencing. RT-qPCR and DNA methylation were applied to observe the effect of obstructive epididymis on the expression of sperm miRNAs. The miRNAs microinjection was used to explore the impacts of sperm miRNAs on embryonic development. RESULTS We confirmed postoperative 8-week mice as the OEE mice model by examining the morphology of the testis and epididymis. In the OEE group, we observed that sperm quality degraded and the development potential of embryos was reduced, which can be saved by the normal epididymal environment. The sperm sRNA sequencing revealed that the expression of the developmental miR-17-92 cluster and the Sfmbt2 miRNA cluster was downregulated in the OEE group. The expression of these two miRNA clusters in epididymis was also downregulated and regulated by DNA methylation. However, the downregulation of either the miR-17-92 cluster or the Sfmbt2 miRNA cluster in normal zygotes did not impair embryonic development. CONCLUSION The obstructive epididymal environment influences sperm quality and resultant embryonic development, as well as the abundance of the developmental miR-17-92 cluster and the Sfmbt2 miRNA cluster in sperm, but these miRNA clusters are not the cause of abnormal embryonic development. It implies that epididymis is important in early embryonic development and may play a potential role in sperm epigenome.
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Affiliation(s)
- Xunwei Wu
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Xiaomei He
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Qian Liu
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Honggang Li
- Institute of Reproductive Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.
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5
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Zeka N, Bejiqi R, Gerguri A, Zogaj L, Jashari H. A new variant of MYCN gene as a cause of Feingold syndrome. Clin Case Rep 2022; 10:e05886. [PMID: 35620261 PMCID: PMC9125397 DOI: 10.1002/ccr3.5886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 04/29/2022] [Accepted: 05/07/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Naim Zeka
- Pediatric Clinic Department of Neurology University Clinical Center of Kosovo Pristina Kosovo
| | - Ramush Bejiqi
- Pediatric Clinic Department of Cardiology University Clinical Center of Kosovo Pristina Kosovo
- Faculty of Medicine University of Gjakova Pristina Kosovo
| | - Abdurrahim Gerguri
- Pediatric Clinic Department of Neurology University Clinical Center of Kosovo Pristina Kosovo
| | - Leonore Zogaj
- Pediatric Clinic Department of Neurology University Clinical Center of Kosovo Pristina Kosovo
| | - Haki Jashari
- Pediatric Clinic Department of Neurology University Clinical Center of Kosovo Pristina Kosovo
- Pediatric Clinic University Children’s Hospital Skopje Republic of North Macedonia
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6
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Overexpression of miR-17 predicts adverse prognosis and disease recurrence for acute myeloid leukemia. Int J Clin Oncol 2022; 27:1222-1232. [PMID: 35536524 PMCID: PMC9209371 DOI: 10.1007/s10147-022-02161-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/24/2022] [Indexed: 11/24/2022]
Abstract
Background The clinical significance of miR-17 in patients with acute myeloid leukemia (AML) remains unknown. Methods Real-time quantitative reverse transcription-polymerase chain reaction (qPCR) was performed to detect the miR-17 expression in 115 de novo AML patients, 31 patients at complete remission (CR) time, 8 patients at relapse time and 30 normal controls. Results MiR-17 was upregulated in de novo AML compared with normal controls. Patients with high expression of miR-17 had less CEBPA double mutation, less favorable ELN-risk and lower CR rate. The level of miR-17 was significantly decreased at CR phase and was returned to primary level even higher when in relapse phase. In addition, Cox regression analysis revealed that miR-17 expression retained independent prognostic significance for overall survival (OS). Moreover, the gene-expression profile analysis of miR-17 in AML obtained from TCGA database was involved in multiple biological functions and signal pathways. Among the differential expressed genes (DEGs), we identified FGL2, PLAUR, SLC2A3, GPR65, CTSS, TLR7, S1PR3, OGFRL1, LILRB1, IL17RA, SIGLEC10, SLAMF7, PLXDC2, HPSE, TCF7 and MYCL as potential direct targets of miR-17 according to in silico analysis. Conclusions High expression of miR-17 in de novo AML patients pointed to dismal clinical outcome and disease recurrence, which could serve as novel prognostic biomarker for AML patients.
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Abstract
MicroRNAs (miRNAs) belong to a class of endogenous small noncoding RNAs that regulate gene expression at the posttranscriptional level, through both translational repression and mRNA destabilization. They are key regulators of kidney morphogenesis, modulating diverse biological processes in different renal cell lineages. Dysregulation of miRNA expression disrupts early kidney development and has been implicated in the pathogenesis of developmental kidney diseases. In this Review, we summarize current knowledge of miRNA biogenesis and function and discuss in detail the role of miRNAs in kidney morphogenesis and developmental kidney diseases, including congenital anomalies of the kidney and urinary tract and Wilms tumor. We conclude by discussing the utility of miRNAs as potentially novel biomarkers and therapeutic agents.
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Affiliation(s)
- Débora Malta Cerqueira
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- John G. Rangos Sr. Research Center, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Maliha Tayeb
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- John G. Rangos Sr. Research Center, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Jacqueline Ho
- Division of Nephrology, Department of Pediatrics, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
- John G. Rangos Sr. Research Center, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
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8
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Muirhead KJ, Clause AR, Schlachetzki Z, Dubbs H, Perry DL, Hagelstrom RT, Taft RJ, Vanderver A. Genome sequencing identifies three molecular diagnoses including a mosaic variant in the COL2A1 gene in an individual with Pol III-related leukodystrophy and Feingold syndrome. Cold Spring Harb Mol Case Stud 2021; 7:a006143. [PMID: 34737199 PMCID: PMC8751417 DOI: 10.1101/mcs.a006143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/02/2021] [Indexed: 12/30/2022] Open
Abstract
Undiagnosed genetic disease imposes a significant burden on families and health-care resources, especially in cases with a complex phenotype. Here we present a child with suspected leukodystrophy in the context of additional features, including hearing loss, clinodactyly, rotated thumbs, tapered fingers, and simplified palmar crease. Trio genome sequencing (GS) identified three molecular diagnoses in this individual: compound heterozygous missense variants associated with polymerase III (Pol III)-related leukodystrophy, a 4-Mb de novo copy-number loss including the MYCN gene associated with Feingold syndrome, and a mosaic single-nucleotide variant associated with COL2A1-related disorders. These variants fully account for the individual's features, but also illustrate the potential for superimposed and unclear contributions of multiple diagnoses to an individual's overall presentation. This report demonstrates the advantage of GS in detection of multiple variant types, including low-level mosaic variants, and emphasizes the need for comprehensive genetic analysis and detailed clinical phenotyping to provide individuals and their families with the maximum benefit for clinical care and genetic counseling.
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Affiliation(s)
- Kayla J Muirhead
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Amanda R Clause
- Illumina Clinical Services Laboratory, Illumina Inc., San Diego, California 92122, USA
| | - Zinayida Schlachetzki
- Illumina Clinical Services Laboratory, Illumina Inc., San Diego, California 92122, USA
| | - Holly Dubbs
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
| | - Denise L Perry
- Illumina Clinical Services Laboratory, Illumina Inc., San Diego, California 92122, USA
| | - R Tanner Hagelstrom
- Illumina Clinical Services Laboratory, Illumina Inc., San Diego, California 92122, USA
| | - Ryan J Taft
- Illumina Clinical Services Laboratory, Illumina Inc., San Diego, California 92122, USA
| | - Adeline Vanderver
- Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, USA
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9
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Pirozzi F, Lee B, Horsley N, Burkardt DD, Dobyns WB, Graham JM, Dentici ML, Cesario C, Schallner J, Porrmann J, Di Donato N, Sanchez-Lara PA, Mirzaa GM. Proximal variants in CCND2 associated with microcephaly, short stature, and developmental delay: A case series and review of inverse brain growth phenotypes. Am J Med Genet A 2021; 185:2719-2738. [PMID: 34087052 DOI: 10.1002/ajmg.a.62362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 01/28/2023]
Abstract
Cyclin D2 (CCND2) is a critical cell cycle regulator and key member of the cyclin D2-CDK4 (DC) complex. De novo variants of CCND2 clustering in the distal part of the protein have been identified as pathogenic causes of brain overgrowth (megalencephaly, MEG) and severe cortical malformations in children including the megalencephaly-polymicrogyria-polydactyly-hydrocephalus (MPPH) syndrome. Megalencephaly-associated CCND2 variants are localized to the terminal exon and result in accumulation of degradation-resistant protein. We identified five individuals from three unrelated families with novel variants in the proximal region of CCND2 associated with microcephaly, mildly simplified cortical gyral pattern, symmetric short stature, and mild developmental delay. Identified variants include de novo frameshift variants and a dominantly inherited stop-gain variant segregating with the phenotype. This is the first reported association between proximal CCND2 variants and microcephaly, to our knowledge. This series expands the phenotypic spectrum of CCND2-related disorders and suggests that distinct classes of CCND2 variants are associated with reciprocal effects on human brain growth (microcephaly and megalencephaly due to possible loss or gain of protein function, respectively), adding to the growing paradigm of inverse phenotypes due to dysregulation of key brain growth genes.
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Affiliation(s)
- Filomena Pirozzi
- Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Benson Lee
- Division of Medical Genetics, Department of Medicine, Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles, California, USA
| | - Nicole Horsley
- Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, Washington, USA
| | - Deepika D Burkardt
- National Human Genome Research Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - William B Dobyns
- Division of Genetics and Metabolism, Department of Pediatrics, University of Minnesota, Minneapolis, Minnesota, USA
| | - John M Graham
- Medical Genetics Institute, Cedars-Sinai Medical Center, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Maria L Dentici
- Medical Genetics Unit, Academic Department of Pediatrics, Bambino Gesù Children's Hospital, IRCSS, Rome, Italy.,Genetics and Rare Diseases Research Division, Bambino Gesù Children's Hospital, IRCSS, Rome, Italy
| | - Claudia Cesario
- Translational Cytogenomics Research Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Jens Schallner
- Department of Neuropediatrics, School of Medicine, Carl Gustav Carus, TU Dresden, Dresden, Germany
| | - Joseph Porrmann
- Institute for Clinical Genetics, University Hospital, TU Dresden, Dresden, Germany
| | - Nataliya Di Donato
- Institute for Clinical Genetics, University Hospital, TU Dresden, Dresden, Germany
| | - Pedro A Sanchez-Lara
- Medical Genetics Institute, Cedars-Sinai Medical Center, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Ghayda M Mirzaa
- Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, Washington, USA.,Division of Medical Genetics, Department of Pediatrics, University of Washington, Seattle, Washington, USA.,Brotman-Baty Institute for Precision Medicine, Seattle, Washington, USA.,Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington, USA
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10
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miR-9-5p promotes wear-particle-induced osteoclastogenesis through activation of the SIRT1/NF-κB pathway. 3 Biotech 2021; 11:258. [PMID: 33987074 DOI: 10.1007/s13205-021-02814-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/26/2021] [Indexed: 10/21/2022] Open
Abstract
To explore the potential function of miR-9-5p in wear-particle-induced osteoclastogenesis, we examined the expression of SIRT1 and miR-9-5p in particle-induced osteolysis (PIO) mice calvariae and polyethylene (PE)-induced RAW 264.7 cells and found that SIRT1 expression was downregulated while miR-9-5p expression was upregulated in both models. We then verified that miR-9-5p targets SIRT1. miR-9-5p was found to promote PE-induced osteoclast formation from RAW 264.7 cells by tartrate-resistant acid phosphatase staining and detection of osteoclast markers, and miR-9-5p activation of the SIRT1/NF-kB signaling pathway was found in cells by detecting the expression of SIRT1/NF-kB pathway-related proteins and rescue assays. In conclusion, we found that miR-9-5p activated the SIRT1/NF-κB pathway to promote wear-particle-induced osteoclastogenesis. miR-9-5p may be a useful therapeutic target for PIO remission and treatment.
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11
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Tedesco MG, Lonardo F, Ceccarini C, Cesarano C, Digilio MC, Magliozzi M, Rogaia D, Mencarelli A, Leoni C, Piscopo C, Imperatore V, Falco MT, Fontana P, Nardone AM, Novelli A, Troiani S, Seri M, Prontera P. Clinical and molecular characterizations of 11 new patients with type 1 Feingold syndrome: Proposal for selecting diagnostic criteria and further genetic testing in patients with severe phenotype. Am J Med Genet A 2021; 185:1204-1210. [PMID: 33442900 DOI: 10.1002/ajmg.a.62068] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 12/18/2020] [Accepted: 12/19/2020] [Indexed: 11/07/2022]
Abstract
Feingold Syndrome type 1 (FS1) is an autosomal dominant disorder due to a loss of function mutations in the MYCN gene. FS1 is generally clinically characterized by mild learning disability, microcephaly, short palpebral fissures, short stature, brachymesophalangy, hypoplastic thumbs, as well as syndactyly of toes, variably associated with organ abnormalities, the most common being gastrointestinal atresia. In current literature, more than 120 FS1 patients have been described, but diagnostic criteria are not well agreed upon, likewise the genotype-phenotype correlations are not well understood. Here, we describe 11 FS1 patients, belonging to six distinct families, where we have identified three novel MYCN mutations along with three pathogenetic variants, the latter which have already been reported. Several patients presented a mild phenotype of the condition and they have been diagnosed as being affected only after segregation analyses of the MYCN mutation identified in the propositus. We also describe here the first ever FS1 patient with severe intellectual disability having a maternally inherited MYCN variant together with an additional GNAO1 mutation inherited paternally. Mutations in the GNAO1 gene are associated with a specific form of intellectual disability and epilepsy, thus the finding of two different rare diseases in the same patient could explain his severe phenotype. Therein, a thorough investigation is merited into the possibility that additional variants in patients with a MYCN mutation and severe phenotype do exist. Finally, in order to guarantee a more reliable diagnosis of FS1, we suggest using both major and minor clinical-molecular diagnostic criteria.
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Affiliation(s)
- Maria Giovanna Tedesco
- Medical Genetics Unit, Santa Maria della Misericordia Hospital and University of Perugia, Perugia, Italy.,Genetics Unit, "Mauro Baschirotto" Institute for Rare Diseases (B.I.R.D.), Vicenza, Italy
| | | | - Caterina Ceccarini
- Cytogenetics Unit, Policlinico Riuniti, University Hospitals Foggia, Foggia, Italy
| | - Carla Cesarano
- Cytogenetics Unit, Policlinico Riuniti, University Hospitals Foggia, Foggia, Italy
| | - Maria Cristina Digilio
- Laboratory of Medical Genetics, Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Monia Magliozzi
- Laboratory of Medical Genetics, Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Daniela Rogaia
- Medical Genetics Unit, Santa Maria della Misericordia Hospital and University of Perugia, Perugia, Italy
| | - Amedea Mencarelli
- Medical Genetics Unit, Santa Maria della Misericordia Hospital and University of Perugia, Perugia, Italy
| | - Chiara Leoni
- Department of Woman and Child Health and Public Health, Center for Rare Diseases and Birth Defects, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Carmelo Piscopo
- U.O.S.C. Medical Genetics, A.O.R.N. "A. Cardarelli", Naples, Italy
| | - Valentina Imperatore
- Medical Genetics Unit, Santa Maria della Misericordia Hospital and University of Perugia, Perugia, Italy
| | | | - Paolo Fontana
- Medical Genetics Unit, "San Pio" Hospital, Benevento, Italy
| | - Anna Maria Nardone
- Medical Genetics Laboratory, "Policlinico Tor Vergata" Hospital, Rome, Italy
| | - Antonio Novelli
- Laboratory of Medical Genetics, Medical Genetics, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Stefania Troiani
- Medical Genetics Unit, Santa Maria della Misericordia Hospital and University of Perugia, Perugia, Italy.,Division of Neonatology and Neonatal Intensive Care Unit, Santa Maria della Misericordia Hospital of Perugia, Perugia, Italy
| | - Marco Seri
- Medical Genetics Unit, Policlinico S. Orsola-Malpighi, University of Bologna, Bologna, Italy
| | - Paolo Prontera
- Medical Genetics Unit, Santa Maria della Misericordia Hospital and University of Perugia, Perugia, Italy
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Yang M, Xu B, Wang J, Zhang Z, Xie H, Wang H, Hu T, Liu S. Genetic diagnoses in pediatric patients with epilepsy and comorbid intellectual disability. Epilepsy Res 2021; 170:106552. [PMID: 33486335 DOI: 10.1016/j.eplepsyres.2021.106552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/19/2020] [Accepted: 01/05/2021] [Indexed: 01/14/2023]
Abstract
PURPOSE The aim of this retrospective study is to investigate the genetic etiology and propose a diagnostic strategy for pediatric patients with epilepsy and comorbid intellectual disability (ID). METHODS From September 2014 to May 2020, a total of 102 pediatric patients diagnosed with epilepsy with co-morbid ID with unknown causes were included in this study. All patients underwent tests of single nucleotide polymorphism (SNP) array for chromosomal abnormalities. Whole exome sequencing (WES) was consecutively performed in patients without diagnostic copy number variants (CNVs) (n = 85) for single nucleotide variants (SNVs). Subgroup analyses based on the age of seizure onset and ID severity were done. RESULTS The overall diagnostic yield of genetic aberrations was 33.3 % (34/102), which comprised 50.0 % with diagnostic CNVs and 50.0 % with diagnostic SNVs. The yield nominally increased with ID severity and decreased with age of seizure onset, though this result was not statistically significant. The diagnostic yield of SNVs in patients with seizure onset in the first year of life (25.0 % (11/44)) was significantly higher than those with childhood-onset epilepsy (10.3 % (6/58)) (p = 0.049), however, the diagnostic yield of CNVs in patients with childhood-onset epilepsy (17.2 % (10/58) was higher than the diagnostic yield of SNVs (10.3 % (6/58)). The most frequently syndromic epilepsy detected by SNP array was Angelman syndrome (n=4), including one confirmed with paternal uniparental disomy. Meanwhile, the most frequent SNVs were mutations of MECP2 (n=2) and IQSEC2 (n = 2) in sporadic cases. CONCLUSION Both CMA and WES are advantageous as unbiased approaches for a genetically heterogeneous condition. We proposed an effective diagnostic strategy for pediatric patients with epilepsy. For patients with seizure onset in the first year of life, WES is recommended as the first-tier test. However, for patients with childhood-onset epilepsy, SNP array should be considered for the first-tier test.
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Affiliation(s)
- Mei Yang
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Bocheng Xu
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Jiamin Wang
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Zhu Zhang
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Hanbing Xie
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - He Wang
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China
| | - Ting Hu
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China.
| | - Shanling Liu
- Department of Obstetrics & Gynecology, West China Second University Hospital, Sichuan University, Chengdu, Sichuan, 610041, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, 610041, China.
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13
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Klaniewska M, Toczewski K, Rozensztrauch A, Bloch M, Dzielendziak A, Gasperowicz P, Slezak R, Ploski R, Rydzanicz M, Smigiel R, Patkowski D. Occurrence of Esophageal Atresia With Tracheoesophageal Fistula in Siblings From Three-Generation Family Affected by Variable Expressivity MYCN Mutation: A Case Report. Front Pediatr 2021; 9:783553. [PMID: 34926353 PMCID: PMC8674716 DOI: 10.3389/fped.2021.783553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 11/04/2021] [Indexed: 11/13/2022] Open
Abstract
The MYCN oncogene encodes a transcription factor belonging to the MYC family. It is primarily expressed in normal developing embryos and is thought to be critical in brain and other neural development. Loss-of-function variants resulting in haploinsufficiency of MYCN, which encodes a protein with a basic helix-loop-helix domain causes Feingold syndrome (OMIM 164280, ORPHA 391641). We present an occurrence of esophageal atresia (EA) with tracheoesophageal fistula in siblings from a three-generation family affected by variable expressivity of MYCN mutation p.(Ser90GlnfsTer176) as a diagnostic effect of searching the cause of familial esophageal atresia using NGS-based whole-exome sequencing (WES). All of our affected patients showed microcephaly and toe syndactyly, which were frequently reported in the literature. Just one patient exhibited clinodactyly. None of the patients exhibited brachymesophalangy or hypoplastic thumbs. The latest report noted that patients with EA and Feingold syndrome were also those with the more complex and severe phenotype. However, following a thorough review of the present literature, the same association was not found, which is also confirmed by the case we described. The variable phenotypic expression of the patients we described and the data from the literature guide a careful differential diagnosis of Feingold syndrome even in cases of poorly expressed and non-specific symptoms.
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Affiliation(s)
- Magdalena Klaniewska
- Department of Pediatrics and Rare Disorders, Medical University, Wroclaw, Poland
| | - Krystian Toczewski
- Department of Pediatric Surgery and Urology, Medical University, Wroclaw, Poland
| | - Anna Rozensztrauch
- Department of Pediatrics and Rare Disorders, Medical University, Wroclaw, Poland
| | - Michal Bloch
- Department of Pediatrics and Rare Disorders, Medical University, Wroclaw, Poland
| | - Agata Dzielendziak
- Department of Pediatric Surgery and Urology, Medical University, Wroclaw, Poland
| | | | - Ryszard Slezak
- Department of Genetics, Medical University, Wroclaw, Poland
| | - Rafał Ploski
- Department of Medical Genetics, Medical University, Warsaw, Poland
| | | | - Robert Smigiel
- Department of Pediatrics and Rare Disorders, Medical University, Wroclaw, Poland
| | - Dariusz Patkowski
- Department of Pediatric Surgery and Urology, Medical University, Wroclaw, Poland
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14
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Nowosad K, Hordyjewska-Kowalczyk E, Tylzanowski P. Mutations in gene regulatory elements linked to human limb malformations. J Med Genet 2019; 57:361-370. [PMID: 31857429 DOI: 10.1136/jmedgenet-2019-106369] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 10/09/2019] [Accepted: 11/03/2019] [Indexed: 01/08/2023]
Abstract
Most of the human genome has a regulatory function in gene expression. The technological progress made in recent years permitted the revision of old and discovery of new mutations outside of the protein-coding regions that do affect human limb morphology. Steadily increasing discovery rate of such mutations suggests that until now the largely neglected part of the genome rises to its well-deserved prominence. In this review, we describe the recent technological advances permitting this unprecedented advance in identifying non-coding mutations. We especially focus on the mutations in cis-regulatory elements such as enhancers, and trans-regulatory elements such as miRNA and long non-coding RNA, linked to hereditary or inborn limb defects. We also discuss the role of chromatin organisation and enhancer-promoter interactions in the aetiology of limb malformations.
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Affiliation(s)
- Karol Nowosad
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland.,The Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Ewa Hordyjewska-Kowalczyk
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland.,The Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Przemko Tylzanowski
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland .,Department of Development and Regeneration, Skeletal Biology and Engineering Research Center, University of Leuven, Leuven, Belgium
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15
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Yan S, Miao L, Lu Y, Wang L. MicroRNA-506 upregulation contributes to sirtuin 1 inhibition of osteoclastogenesis in bone marrow stromal cells induced by TNF-α treatment. Cell Biochem Funct 2019; 37:598-607. [PMID: 31515847 DOI: 10.1002/cbf.3436] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 08/06/2019] [Accepted: 08/26/2019] [Indexed: 11/07/2022]
Abstract
As a deacetylase relying on NAD, sirtuin 1 (SIRT1) has been proven to inhibit osteoclastogenesis directly by repressing reactive oxygen species (ROS) production and TRPV1 channel stimulation modulated by TNF-α. MicroRNAs do not have coding functions, but they influence the expression of particular genes after transcription. Nevertheless, the current understanding of the impact of SIRT1 on osteoclastogenesis is insufficient. Our research explored whether and how miRNAs contributed to osteoclast differentiation modulated by SIRT1 in vitro. In osteoclastogenesis induced by RANKL in bone marrow-derived macrophages (BMMs), repression of SIRT1 expression and enhancement of miR-506 expression were discovered. Transfection with an miR-506 inhibitor repressed miR-506 concentration in BMMs treated with RANKL. Additional research revealed that BMMs with repressed miR-506 treated with RANKL displayed phenotypes with suppressed osteoclastogenesis, as demonstrated by TRAP staining, reduced function, decreased expression of osteoclast markers and correlated genes, and reduced multinuclear cell quantity. Bioinformatics prediction outcomes and the dual-luciferase reporter test suggested that miR-506 targeted the SIRT1 3'-UTR for silencing. Decreased miR-506 in BMMs induced by RANKL caused SIRT1 upregulation. Additionally, treatment with EX-527 (SIRT1 repressor) or SIRT1 silencing attenuated repression caused by miR-506 depletion in BMMs treated with RANKL. Furthermore, TNF-α was repressed via miR-506 inhibition but was enhanced following EX-527 incubation as well as SIRT1 depletion. TRPV1 channel stimulation and ROS generation, which was related to osteoclastogenesis, were reduced via miR-506 depletion. miR-506 modulated osteoclastogenesis by targeting SIRT1 expression in part through modulation of the TRPV1 channel, ROS production, and TNF-α.
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Affiliation(s)
- Shu Yan
- General Medical Wards, the Third Hospital Affiliated from Soochow University, Changzhou, China
| | - Lujie Miao
- Department of Gastroenterology, the Third Hospital Affiliated from Soochow University, Changzhou, China
| | - Yahua Lu
- General Medical Wards, the Third Hospital Affiliated from Soochow University, Changzhou, China
| | - Liangzhi Wang
- General Medical Wards, the Third Hospital Affiliated from Soochow University, Changzhou, China
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16
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Deletions and loss-of-function variants in TP63 associated with orofacial clefting. Eur J Hum Genet 2019; 27:1101-1112. [PMID: 30850703 DOI: 10.1038/s41431-019-0370-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 02/04/2019] [Accepted: 02/12/2019] [Indexed: 11/08/2022] Open
Abstract
We aimed to identify novel deletions and variants of TP63 associated with orofacial clefting (OFC). Copy number variants were assessed in three OFC families using microarray analysis. Subsequently, we analyzed TP63 in a cohort of 1072 individuals affected with OFC and 706 population-based controls using molecular inversion probes (MIPs). We identified partial deletions of TP63 in individuals from three families affected with OFC. In the OFC cohort, we identified several TP63 variants predicting to cause loss-of-function alleles, including a frameshift variant c.569_576del (p.(Ala190Aspfs*5)) and a nonsense variant c.997C>T (p.(Gln333*)) that introduces a premature stop codon in the DNA-binding domain. In addition, we identified the first missense variants in the oligomerization domain c.1213G>A (p.(Val405Met)), which occurred in individuals with OFC. This variant was shown to abrogate oligomerization of mutant p63 protein into oligomeric complexes, and therefore likely represents a loss-of-function allele rather than a dominant-negative. All of these variants were inherited from an unaffected parent, suggesting reduced penetrance of such loss-of-function alleles. Our data indicate that loss-of-function alleles in TP63 can also give rise to OFC as the main phenotype. We have uncovered the dosage-dependent functions of p63, which were previously rejected.
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17
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Muriello M, Kim AY, Schatz KS, Beck N, Gunay-Aygun M, Hoover-Fong JE. Growth hormone deficiency, aortic dilation, and neurocognitive issues in Feingold syndrome 2. Am J Med Genet A 2019; 179:410-416. [PMID: 30672094 PMCID: PMC7038632 DOI: 10.1002/ajmg.a.61037] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 12/12/2018] [Accepted: 12/17/2018] [Indexed: 11/07/2022]
Abstract
We report three patients with Feingold 2 syndrome with the novel features of growth hormone deficiency associated with adenohypophyseal compression, aortic dilation, phalangeal joint contractures, memory, and sleep problems in addition to the typical features of microcephaly, brachymesophalangy, toe syndactyly, short stature, and cardiac anomalies. Microdeletions of chromosome 13q that include the MIR17HG gene were found in all three. One of the patients was treated successfully with growth hormone. In addition to expanding the phenotype of Feingold 2 syndrome, we suggest management of patients with Feingold 2 syndrome include echocardiography at the time of diagnosis in all patients and consideration of evaluation for growth hormone deficiency in patients with short stature.
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Affiliation(s)
- Michael Muriello
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Alexander Y. Kim
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland
| | | | - Natalie Beck
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland
- Greenberg Center for Skeletal Dysplasia, Johns Hopkins University, Baltimore, Maryland
| | - Meral Gunay-Aygun
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland
| | - Julie E. Hoover-Fong
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University, Baltimore, Maryland
- Greenberg Center for Skeletal Dysplasia, Johns Hopkins University, Baltimore, Maryland
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18
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Lord J, McMullan DJ, Eberhardt RY, Rinck G, Hamilton SJ, Quinlan-Jones E, Prigmore E, Keelagher R, Best SK, Carey GK, Mellis R, Robart S, Berry IR, Chandler KE, Cilliers D, Cresswell L, Edwards SL, Gardiner C, Henderson A, Holden ST, Homfray T, Lester T, Lewis RA, Newbury-Ecob R, Prescott K, Quarrell OW, Ramsden SC, Roberts E, Tapon D, Tooley MJ, Vasudevan PC, Weber AP, Wellesley DG, Westwood P, White H, Parker M, Williams D, Jenkins L, Scott RH, Kilby MD, Chitty LS, Hurles ME, Maher ER. Prenatal exome sequencing analysis in fetal structural anomalies detected by ultrasonography (PAGE): a cohort study. Lancet 2019; 393:747-757. [PMID: 30712880 PMCID: PMC6386638 DOI: 10.1016/s0140-6736(18)31940-8] [Citation(s) in RCA: 362] [Impact Index Per Article: 72.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 07/26/2018] [Accepted: 08/15/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND Fetal structural anomalies, which are detected by ultrasonography, have a range of genetic causes, including chromosomal aneuploidy, copy number variations (CNVs; which are detectable by chromosomal microarrays), and pathogenic sequence variants in developmental genes. Testing for aneuploidy and CNVs is routine during the investigation of fetal structural anomalies, but there is little information on the clinical usefulness of genome-wide next-generation sequencing in the prenatal setting. We therefore aimed to evaluate the proportion of fetuses with structural abnormalities that had identifiable variants in genes associated with developmental disorders when assessed with whole-exome sequencing (WES). METHODS In this prospective cohort study, two groups in Birmingham and London recruited patients from 34 fetal medicine units in England and Scotland. We used whole-exome sequencing (WES) to evaluate the presence of genetic variants in developmental disorder genes (diagnostic genetic variants) in a cohort of fetuses with structural anomalies and samples from their parents, after exclusion of aneuploidy and large CNVs. Women were eligible for inclusion if they were undergoing invasive testing for identified nuchal translucency or structural anomalies in their fetus, as detected by ultrasound after 11 weeks of gestation. The partners of these women also had to consent to participate. Sequencing results were interpreted with a targeted virtual gene panel for developmental disorders that comprised 1628 genes. Genetic results related to fetal structural anomaly phenotypes were then validated and reported postnatally. The primary endpoint, which was assessed in all fetuses, was the detection of diagnostic genetic variants considered to have caused the fetal developmental anomaly. FINDINGS The cohort was recruited between Oct 22, 2014, and June 29, 2017, and clinical data were collected until March 31, 2018. After exclusion of fetuses with aneuploidy and CNVs, 610 fetuses with structural anomalies and 1202 matched parental samples (analysed as 596 fetus-parental trios, including two sets of twins, and 14 fetus-parent dyads) were analysed by WES. After bioinformatic filtering and prioritisation according to allele frequency and effect on protein and inheritance pattern, 321 genetic variants (representing 255 potential diagnoses) were selected as potentially pathogenic genetic variants (diagnostic genetic variants), and these variants were reviewed by a multidisciplinary clinical review panel. A diagnostic genetic variant was identified in 52 (8·5%; 95% CI 6·4-11·0) of 610 fetuses assessed and an additional 24 (3·9%) fetuses had a variant of uncertain significance that had potential clinical usefulness. Detection of diagnostic genetic variants enabled us to distinguish between syndromic and non-syndromic fetal anomalies (eg, congenital heart disease only vs a syndrome with congenital heart disease and learning disability). Diagnostic genetic variants were present in 22 (15·4%) of 143 fetuses with multisystem anomalies (ie, more than one fetal structural anomaly), nine (11·1%) of 81 fetuses with cardiac anomalies, and ten (15·4%) of 65 fetuses with skeletal anomalies; these phenotypes were most commonly associated with diagnostic variants. However, diagnostic genetic variants were least common in fetuses with isolated increased nuchal translucency (≥4·0 mm) in the first trimester (in three [3·2%] of 93 fetuses). INTERPRETATION WES facilitates genetic diagnosis of fetal structural anomalies, which enables more accurate predictions of fetal prognosis and risk of recurrence in future pregnancies. However, the overall detection of diagnostic genetic variants in a prospectively ascertained cohort with a broad range of fetal structural anomalies is lower than that suggested by previous smaller-scale studies of fewer phenotypes. WES improved the identification of genetic disorders in fetuses with structural abnormalities; however, before clinical implementation, careful consideration should be given to case selection to maximise clinical usefulness. FUNDING UK Department of Health and Social Care and The Wellcome Trust.
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Affiliation(s)
| | - Dominic J McMullan
- West Midlands Regional Genetics Service, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, UK
| | | | | | - Susan J Hamilton
- West Midlands Regional Genetics Service, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, UK
| | - Elizabeth Quinlan-Jones
- West Midlands Fetal Medicine Centre, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, UK; Centre for Women's and Newborn Health, Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
| | | | - Rebecca Keelagher
- West Midlands Regional Genetics Service, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, UK
| | - Sunayna K Best
- North East Thames Regional Genetics Service, UCL Great Ormond Street Institute of Child Health, Great Ormond Street NHS Foundation Trust, London UK
| | - Georgina K Carey
- West Midlands Regional Genetics Service, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, UK
| | - Rhiannon Mellis
- North East Thames Regional Genetics Service, UCL Great Ormond Street Institute of Child Health, Great Ormond Street NHS Foundation Trust, London UK
| | - Sarah Robart
- North East Thames Regional Genetics Service, UCL Great Ormond Street Institute of Child Health, Great Ormond Street NHS Foundation Trust, London UK
| | - Ian R Berry
- The Leeds Genetics Laboratory, St James's University Hospital, Yorkshire Regional Genetics Service, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Kate E Chandler
- Manchester Centre for Genomic Medicine, Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Deirdre Cilliers
- Oxford Genomic Medicine Centre, Nuffield Orthopaedic Centre, Oxford, UK
| | - Lara Cresswell
- Department of Cytogenetics, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Sandra L Edwards
- Cytogenetics Service, Norfolk and Norwich University Hospital Foundation Trust, Norwich, UK
| | - Carol Gardiner
- West of Scotland Genetics Services, Queen Elizabeth University Hospital, Glasgow, UK
| | - Alex Henderson
- Northern Genetics Service, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Simon T Holden
- Department of Clinical Genetics, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK
| | - Tessa Homfray
- South West Thames Regional Genetics Centre, St George's University Hospitals NHS Foundation Trust, London, UK
| | - Tracy Lester
- Oxford Regional Genetics Services, The Churchill Hospital, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Rebecca A Lewis
- Bristol Genetics Laboratory, Southmead Hospital, North Bristol NHS Trust, Bristol, UK
| | - Ruth Newbury-Ecob
- Department of Clinical Genetics, St Michael's Hospital, University Hospitals Bristol, Bristol, UK
| | - Katrina Prescott
- Chapel Allerton Hospital, Yorkshire Regional Genetics Service, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Oliver W Quarrell
- Department of Clinical Genetics, Sheffield Children's NHS Foundation Trust, Sheffield, UK
| | - Simon C Ramsden
- Manchester Centre for Genomic Medicine, Manchester University Hospitals NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Eileen Roberts
- Bristol Genetics Laboratory, Southmead Hospital, North Bristol NHS Trust, Bristol, UK
| | - Dagmar Tapon
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - Madeleine J Tooley
- Department of Clinical Genetics, St Michael's Hospital, University Hospitals Bristol, Bristol, UK
| | - Pradeep C Vasudevan
- Department of Clinical Genetics, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK
| | - Astrid P Weber
- Department of Clinical Genetics, Liverpool Women's NHS Foundation Trust, Liverpool, UK
| | - Diana G Wellesley
- Faculty of Medicine, University of Southampton, Southampton, UK; Wessex Regional Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Paul Westwood
- West of Scotland Genetics Services, Queen Elizabeth University Hospital, Glasgow, UK
| | - Helen White
- Faculty of Medicine, University of Southampton, Southampton, UK; Wessex Regional Clinical Genetics Service, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Michael Parker
- The Ethox Centre, Nuffield Department of Population Health and Wellcome Centre for Ethics and Humanities, University of Oxford, Oxford, UK
| | - Denise Williams
- West Midlands Regional Genetics Service, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, UK
| | - Lucy Jenkins
- North East Thames Regional Genetics Service, UCL Great Ormond Street Institute of Child Health, Great Ormond Street NHS Foundation Trust, London UK
| | - Richard H Scott
- North East Thames Regional Genetics Service, UCL Great Ormond Street Institute of Child Health, Great Ormond Street NHS Foundation Trust, London UK
| | - Mark D Kilby
- West Midlands Fetal Medicine Centre, Birmingham Women's and Children's National Health Service (NHS) Foundation Trust, Birmingham, UK; Centre for Women's and Newborn Health, Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, UK
| | - Lyn S Chitty
- North East Thames Regional Genetics Service, UCL Great Ormond Street Institute of Child Health, Great Ormond Street NHS Foundation Trust, London UK
| | | | - Eamonn R Maher
- Department of Clinical Genetics, Cambridge University Hospitals NHS Foundation Trust, Cambridge, UK; Department of Medical Genetics, University of Cambridge, Cambridge, UK; Cambridge Biomedical Research Centre, National Institute for Health Research, Cambridge, UK.
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19
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Kato K, Miya F, Hamada N, Negishi Y, Narumi-Kishimoto Y, Ozawa H, Ito H, Hori I, Hattori A, Okamoto N, Kato M, Tsunoda T, Kanemura Y, Kosaki K, Takahashi Y, Nagata KI, Saitoh S. MYCN de novo gain-of-function mutation in a patient with a novel megalencephaly syndrome. J Med Genet 2018; 56:388-395. [PMID: 30573562 DOI: 10.1136/jmedgenet-2018-105487] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 11/07/2018] [Accepted: 11/30/2018] [Indexed: 01/31/2023]
Abstract
BACKGROUND In this study, we aimed to identify the gene abnormality responsible for pathogenicity in an individual with an undiagnosed neurodevelopmental disorder with megalencephaly, ventriculomegaly, hypoplastic corpus callosum, intellectual disability, polydactyly and neuroblastoma. We then explored the underlying molecular mechanism. METHODS Trio-based, whole-exome sequencing was performed to identify disease-causing gene mutation. Biochemical and cell biological analyses were carried out to elucidate the pathophysiological significance of the identified gene mutation. RESULTS We identified a heterozygous missense mutation (c.173C>T; p.Thr58Met) in the MYCN gene, at the Thr58 phosphorylation site essential for ubiquitination and subsequent MYCN degradation. The mutant MYCN (MYCN-T58M) was non-phosphorylatable at Thr58 and subsequently accumulated in cells and appeared to induce CCND1 and CCND2 expression in neuronal progenitor and stem cells in vitro. Overexpression of Mycn mimicking the p.Thr58Met mutation also promoted neuronal cell proliferation, and affected neuronal cell migration during corticogenesis in mouse embryos. CONCLUSIONS We identified a de novo c.173C>T mutation in MYCN which leads to stabilisation and accumulation of the MYCN protein, leading to prolonged CCND1 and CCND2 expression. This may promote neurogenesis in the developing cerebral cortex, leading to megalencephaly. While loss-of-function mutations in MYCN are known to cause Feingold syndrome, this is the first report of a germline gain-of-function mutation in MYCN identified in a patient with a novel megalencephaly syndrome similar to, but distinct from, CCND2-related megalencephaly-polymicrogyria-polydactyly-hydrocephalus syndrome. The data obtained here provide new insight into the critical role of MYCN in brain development, as well as the consequences of MYCN defects.
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Affiliation(s)
- Kohji Kato
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.,Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Fuyuki Miya
- Department of Medical Science Mathematics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.,Laboratory for Medical Science Mathematics, Center for Integrative Medical Sciences, Tokyo, Japan
| | - Nanako Hamada
- Department of Molecular Neurobiology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Japan
| | - Yutaka Negishi
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | | | - Hiroshi Ozawa
- Department of Pediatrics, Shimada Ryoiku Center Hachiouji, Tokyo, Japan
| | - Hidenori Ito
- Department of Molecular Neurobiology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Japan
| | - Ikumi Hori
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Ayako Hattori
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Nobuhiko Okamoto
- Department of Medical Genetics, Osaka Women's and Children's Hospital, Osaka, Japan
| | - Mitsuhiro Kato
- Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
| | - Tatsuhiko Tsunoda
- Department of Medical Science Mathematics, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan.,Laboratory for Medical Science Mathematics, Center for Integrative Medical Sciences, Tokyo, Japan
| | - Yonehiro Kanemura
- Division of Biomedical Research and Innovation, Institute for Clinical Research, Osaka National Hospital, National Hospital Organization, Osaka, Japan.,Department of Neurosurgery, Osaka National Hospital, National Hospital Organization, Osaka, Japan
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Yoshiyuki Takahashi
- Department of Pediatrics, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Koh-Ichi Nagata
- Department of Molecular Neurobiology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Japan
| | - Shinji Saitoh
- Department of Pediatrics and Neonatology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
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20
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A conserved HH-Gli1-Mycn network regulates heart regeneration from newt to human. Nat Commun 2018; 9:4237. [PMID: 30315164 PMCID: PMC6185975 DOI: 10.1038/s41467-018-06617-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 08/15/2018] [Indexed: 01/07/2023] Open
Abstract
The mammalian heart has a limited regenerative capacity and typically progresses to heart failure following injury. Here, we defined a hedgehog (HH)-Gli1-Mycn network for cardiomyocyte proliferation and heart regeneration from amphibians to mammals. Using a genome-wide screen, we verified that HH signaling was essential for heart regeneration in the injured newt. Next, pharmacological and genetic loss- and gain-of-function of HH signaling demonstrated the essential requirement for HH signaling in the neonatal, adolescent, and adult mouse heart regeneration, and in the proliferation of hiPSC-derived cardiomyocytes. Fate-mapping and molecular biological studies revealed that HH signaling, via a HH-Gli1-Mycn network, contributed to heart regeneration by inducing proliferation of pre-existing cardiomyocytes and not by de novo cardiomyogenesis. Further, Mycn mRNA transfection experiments recapitulated the effects of HH signaling and promoted adult cardiomyocyte proliferation. These studies defined an evolutionarily conserved function of HH signaling that may serve as a platform for human regenerative therapies. Due to the limited proliferation capacity of adult mammalian cardiomyocytes, the human heart has negligible regenerative capacity after injury. Here the authors show that a Hedgehog-Gli1-Mycn signaling cascade regulates cardiomyocyte proliferation and cardiac regeneration from amphibians to mammals.
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21
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Yu X, Hu L, Liu X, Zhan G, Mei M, Wang H, Zhang X, Qiu Z, Zhou W, Yang L. A Novel MYCN Variant Associated with Intellectual Disability Regulates Neuronal Development. Neurosci Bull 2018; 34:854-858. [PMID: 29786759 DOI: 10.1007/s12264-018-0236-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 04/17/2018] [Indexed: 11/25/2022] Open
Affiliation(s)
- Xiuya Yu
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Liyuan Hu
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Xu Liu
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Guodong Zhan
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Mei Mei
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Huijun Wang
- Key Laboratory of Birth Defects, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Xiaohua Zhang
- Department of Neurosurgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Zilong Qiu
- Institute of Neuroscience, Shanghai Institute of Biological Sciences, Chinese Academy of Sciences, Shanghai, 200031, China
| | - Wenhao Zhou
- Department of Neonatology, Children's Hospital of Fudan University, Shanghai, 201102, China
- Key Laboratory of Birth Defects, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Lin Yang
- Key Laboratory of Birth Defects, Children's Hospital of Fudan University, Shanghai, 201102, China.
- Department of Genetics, Children's Hospital of Fudan University, Shanghai, 201102, China.
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22
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Burnside RD, Molinari S, Botti C, Brooks SS, Chung WK, Mehta L, Schwartz S, Papenhausen P. Features of Feingold syndrome 1 dominate in subjects with 2p deletions including
MYCN. Am J Med Genet A 2018; 176:1956-1963. [DOI: 10.1002/ajmg.a.40355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 04/14/2018] [Accepted: 04/17/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Rachel D. Burnside
- Laboratory Corporation of America HoldingsCenter for Molecular Biology and Pathology, Research Triangle Park North Carolina
| | - Sharon Molinari
- Laboratory Corporation of America HoldingsCenter for Molecular Biology and Pathology, Research Triangle Park North Carolina
| | - Christina Botti
- Division of Medical Genetics, Department of PediatricsRutgers‐Robert Wood Johnson Medical School New Brunswick New Jersey
| | - Susan Sklower Brooks
- Division of Medical Genetics, Department of PediatricsRutgers‐Robert Wood Johnson Medical School New Brunswick New Jersey
| | - Wendy K. Chung
- Department of PediatricsColumbia University New York New York
- Department of MedicineColumbia University New York New York
| | - Lakshmi Mehta
- Department of Genetics and Genomic SciencesIcahn School of Medicine at Mount Sinai New York New York
| | - Stuart Schwartz
- Laboratory Corporation of America HoldingsCenter for Molecular Biology and Pathology, Research Triangle Park North Carolina
| | - Peter Papenhausen
- Laboratory Corporation of America HoldingsCenter for Molecular Biology and Pathology, Research Triangle Park North Carolina
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23
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Ruan L, Yang Y, Huang Y, Ding L, Zhang C, Wu X. Functional prediction of miR-3144-5p in human cardiac myocytes based on transcriptome sequencing and bioinformatics. Medicine (Baltimore) 2017; 96:e7539. [PMID: 28796037 PMCID: PMC5556203 DOI: 10.1097/md.0000000000007539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND RAN guanine nucleotide release factor (RANGRF) encoding protein MOG1 plays an important role in cardiac arrhythmia, so we intended to investigate the regulatory miRNA of RANGRF and explore its potential regulatory mechanism in arrhythmogenesis. METHODS Based on bioinformatic analysis, miR-3144-5p was predicted to be a regulatory miRNA of RANGRF, which were then validated through a dual-luciferase reporter plasmid assay. Subsequently, the expression level of miR-3144-5p in human cardiac myocytes (HCMs) was detected, followed by cell transfection with miR-3144-5p mimics. Transcriptome sequencing was then performed in HCMs with or without transfection. The sequencing results were subjected to bioinformatic analyses, including differentially expressed gene (DEG) analysis, functional enrichment analysis, protein-protein interaction (PPI) network analysis, miRNA-target gene analysis, and miRNA-transcription factor (TF)-target gene coregulatory network analysis. RESULTS There really existed a regulatory relation between miR-3144-5p and RANGRF. The expression level of miR-3144-5p was low in HCMs. After cell transfection, miR-3144-5p expression level significantly increased in HCMs. Bioinformatic analyses of the transcriptome sequencing results identified 300 upregulated and 271 downregulated DEGs between miR-3144-5p mimic and control group. The upregulated genes ISL1 and neuregulin 1 (NRG1) were significantly enriched in cardiac muscle cell myoblast differentiation (GO:0060379). CCL21 was one of the hub genes in the PPI network and also a target gene of miR-3144-5p. Moreover, the TF of v-Myc avian myelocytomatosis viral oncogene neuroblastoma-derived homolog (MYCN) was involved in the miR-3144-5p-TF-target gene coregulatory network and interacted with the target genes of miR-3144-5p. CONCLUSION ISL1, NRG1, CCL21, and MYCN were differentially expressed in the miR-3144-5p mimic group, suggesting that miR-3144-5p overexpression plays a role in HCMs by regulating these genes and TF. This study may provide new insight into the mechanisms behind the progression of cardiac arrhythmia.
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24
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MicroRNA therapeutics: towards a new era for the management of cancer and other diseases. Nat Rev Drug Discov 2017; 16:203-222. [PMID: 28209991 DOI: 10.1038/nrd.2016.246] [Citation(s) in RCA: 3241] [Impact Index Per Article: 463.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In just over two decades since the discovery of the first microRNA (miRNA), the field of miRNA biology has expanded considerably. Insights into the roles of miRNAs in development and disease, particularly in cancer, have made miRNAs attractive tools and targets for novel therapeutic approaches. Functional studies have confirmed that miRNA dysregulation is causal in many cases of cancer, with miRNAs acting as tumour suppressors or oncogenes (oncomiRs), and miRNA mimics and molecules targeted at miRNAs (antimiRs) have shown promise in preclinical development. Several miRNA-targeted therapeutics have reached clinical development, including a mimic of the tumour suppressor miRNA miR-34, which reached phase I clinical trials for treating cancer, and antimiRs targeted at miR-122, which reached phase II trials for treating hepatitis. In this article, we describe recent advances in our understanding of miRNAs in cancer and in other diseases and provide an overview of current miRNA therapeutics in the clinic. We also discuss the challenge of identifying the most efficacious therapeutic candidates and provide a perspective on achieving safe and targeted delivery of miRNA therapeutics.
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25
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Mogilyansky E, Clark P, Quann K, Zhou H, Londin E, Jing Y, Rigoutsos I. Post-transcriptional Regulation of BRCA2 through Interactions with miR-19a and miR-19b. Front Genet 2016; 7:143. [PMID: 27630665 PMCID: PMC5005319 DOI: 10.3389/fgene.2016.00143] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 07/21/2016] [Indexed: 12/31/2022] Open
Abstract
Breast cancer type 2, early onset susceptibility gene (BRCA2) is a major component of the homologous recombination DNA repair pathway. It acts as a tumor suppressor whose function is often lost in cancers. Patients with specific mutations in the BRCA2 gene often display discrete clinical, histopathological, and molecular features. However, a subset of sporadic cancers has wild type BRCA2 and display defects in the homology-directed repair pathway, which is the hallmark of ‘BRCAness.’ The mechanisms by which BRCAness arises are not well understood but post-transcriptional regulation of BRCA2 gene expression by microRNAs (miRNAs) may contribute to this phenotype. Here, we examine the post-transcriptional effects that some members of the six-miRNA cluster known as the miR-17/92 cluster have on the abundance of BRCA2’s messenger RNA (mRNA) and protein. We discuss two interactions involving the miR-19a and miR-19b members of the cluster and the 3′UTR of BRCA2’s mRNA. We investigated these miRNA:mRNA interactions in 15 cell lines derived from pancreatic, breast, colon, and kidney tissue. We show that over-expression of these two miRNAs results in a concomitant decrease of BRCA2’s mRNA and protein expression in a subset of the tested cell lines. Additionally, using luciferase reporter assays we identified direct interactions between miR-19a/miR-19b and a miRNA response element (MRE) in BRCA2’s 3′UTR. Our results suggest that BRCA2 is subject to a complex post-transcriptional regulatory program that has specific dependencies on the genetic and phenotypic background of cell types.
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Affiliation(s)
- Elena Mogilyansky
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia PA, USA
| | - Peter Clark
- Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, Philadelphia PA, USA
| | - Kevin Quann
- Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia PA, USA
| | - Honglei Zhou
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia PA, USA
| | - Eric Londin
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia PA, USA
| | - Yi Jing
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia PA, USA
| | - Isidore Rigoutsos
- Computational Medicine Center, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia PA, USA
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26
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MicroRNAs in Osteoclastogenesis and Function: Potential Therapeutic Targets for Osteoporosis. Int J Mol Sci 2016; 17:349. [PMID: 27005616 PMCID: PMC4813210 DOI: 10.3390/ijms17030349] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 02/24/2016] [Accepted: 03/03/2016] [Indexed: 02/05/2023] Open
Abstract
Abnormal osteoclast formation and resorption play a fundamental role in osteoporosis pathogenesis. Over the past two decades, much progress has been made to target osteoclasts. The existing therapeutic drugs include bisphosphonates, hormone replacement therapy, selective estrogen receptor modulators, calcitonin and receptor activator of nuclear factor NF-κB ligand (RANKL) inhibitor (denosumab), etc. Among them, bisphosphonates are most widely used due to their low price and high efficiency in reducing the risk of fracture. However, bisphosphonates still have their limitations, such as the gastrointestinal side-effects, osteonecrosis of the jaw, and atypical subtrochanteric fracture. Based on the current situation, research for new drugs to regulate bone resorption remains relevant. MicroRNAs (miRNAs) are a new group of small, noncoding RNAs of 19–25 nucleotides, which negatively regulate gene expression after transcription. Recent studies discovered miRNAs play a considerable function in bone remodeling by regulating osteoblast and osteoclast differentiation and function. An increasing number of miRNAs have been identified to participate in osteoclast formation, differentiation, apoptosis, and resorption. miRNAs show great promise to serve as biomarkers and potential therapeutic targets for osteoporosis. In this review, we will summarize our current understanding of how miRNAs regulate osteoclastogenesis and function. We will further discuss the approach to develop drugs for osteoporosis based on these miRNA networks.
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27
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Petroni M, Sardina F, Heil C, Sahún-Roncero M, Colicchia V, Veschi V, Albini S, Fruci D, Ricci B, Soriani A, Di Marcotullio L, Screpanti I, Gulino A, Giannini G. The MRN complex is transcriptionally regulated by MYCN during neural cell proliferation to control replication stress. Cell Death Differ 2016; 23:197-206. [PMID: 26068589 PMCID: PMC4716299 DOI: 10.1038/cdd.2015.81] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Revised: 04/12/2015] [Accepted: 05/18/2015] [Indexed: 12/27/2022] Open
Abstract
The MRE11/RAD50/NBS1 (MRN) complex is a major sensor of DNA double strand breaks, whose role in controlling faithful DNA replication and preventing replication stress is also emerging. Inactivation of the MRN complex invariably leads to developmental and/or degenerative neuronal defects, the pathogenesis of which still remains poorly understood. In particular, NBS1 gene mutations are associated with microcephaly and strongly impaired cerebellar development, both in humans and in the mouse model. These phenotypes strikingly overlap those induced by inactivation of MYCN, an essential promoter of the expansion of neuronal stem and progenitor cells, suggesting that MYCN and the MRN complex might be connected on a unique pathway essential for the safe expansion of neuronal cells. Here, we show that MYCN transcriptionally controls the expression of each component of the MRN complex. By genetic and pharmacological inhibition of the MRN complex in a MYCN overexpression model and in the more physiological context of the Hedgehog-dependent expansion of primary cerebellar granule progenitor cells, we also show that the MRN complex is required for MYCN-dependent proliferation. Indeed, its inhibition resulted in DNA damage, activation of a DNA damage response, and cell death in a MYCN- and replication-dependent manner. Our data indicate the MRN complex is essential to restrain MYCN-induced replication stress during neural cell proliferation and support the hypothesis that replication-born DNA damage is responsible for the neuronal defects associated with MRN dysfunctions.
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Affiliation(s)
- M Petroni
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - F Sardina
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - C Heil
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - M Sahún-Roncero
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - V Colicchia
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - V Veschi
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - S Albini
- Paediatric Haematology/Oncology Department, IRCCS, Ospedale Pediatrico Bambino Gesù, 00165 Rome, Italy
| | - D Fruci
- Paediatric Haematology/Oncology Department, IRCCS, Ospedale Pediatrico Bambino Gesù, 00165 Rome, Italy
| | - B Ricci
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - A Soriani
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - L Di Marcotullio
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - I Screpanti
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - A Gulino
- Department Molecular Medicine, University La Sapienza, 00161 Rome, Italy
| | - G Giannini
- Istituto Pasteur-Fondazione Cenci Bolognetti, Deptartment of Molecular Medicine, University La Sapienza, 00161 Rome, Italy
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Warrander F, Faas L, Kovalevskiy O, Peters D, Coles M, Antson AA, Genever P, Isaacs HV. lin28 proteins promote expression of 17∼92 family miRNAs during amphibian development. Dev Dyn 2015; 245:34-46. [PMID: 26447465 PMCID: PMC4982076 DOI: 10.1002/dvdy.24358] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 09/22/2015] [Accepted: 09/24/2015] [Indexed: 12/13/2022] Open
Abstract
Background: Lin28 proteins are post‐transcriptional regulators of gene expression with multiple roles in development and the regulation of pluripotency in stem cells. Much attention has focussed on Lin28 proteins as negative regulators of let‐7 miRNA biogenesis; a function that is conserved in several animal groups and in multiple processes. However, there is increasing evidence that Lin28 proteins have additional roles, distinct from regulation of let‐7 abundance. We have previously demonstrated that lin28 proteins have functions associated with the regulation of early cell lineage specification in Xenopus embryos, independent of a lin28/let‐7 regulatory axis. However, the nature of lin28 targets in Xenopus development remains obscure. Results: Here, we show that mir‐17∼92 and mir‐106∼363 cluster miRNAs are down‐regulated in response to lin28 knockdown, and RNAs from these clusters are co‐expressed with lin28 genes during germ layer specification. Mature miRNAs derived from pre‐mir‐363 are most sensitive to lin28 inhibition. We demonstrate that lin28a binds to the terminal loop of pre‐mir‐363 with an affinity similar to that of let‐7, and that this high affinity interaction requires to conserved a GGAG motif. Conclusions: Our data suggest a novel function for amphibian lin28 proteins as positive regulators of mir‐17∼92 family miRNAs. Developmental Dynamics 245:34–46, 2016. © 2015 Wiley Periodicals, Inc. We show that mir‐17∼92 and mir‐106∼363 cluster miRNAs are down regulated in response to lin28 knockdown in Xenopus embryos. We demonstrate that lin28a binds to the terminal loop of pre‐mir‐363 and this interaction requires a conserved a GGAG motif.
Our data suggest a novel function for amphibian lin28 proteins as positive regulators of mir‐17∼92 family miRNAs.
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Affiliation(s)
- Fiona Warrander
- Department of Biology, University of York, York, YO10 5DD, UK
| | - Laura Faas
- Department of Biology, University of York, York, YO10 5DD, UK
| | - Oleg Kovalevskiy
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington York, YO10 5DD, UK
| | - Daniel Peters
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington York, YO10 5DD, UK
| | - Mark Coles
- Centre for Immunology and Infection, University of York, Heslington York, YO10 5DD, UK
| | - Alfred A Antson
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington York, YO10 5DD, UK
| | - Paul Genever
- Department of Biology, University of York, York, YO10 5DD, UK
| | - Harry V Isaacs
- Department of Biology, University of York, York, YO10 5DD, UK
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29
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Grote LE, Repnikova EA, Amudhavalli SM. Expanding the phenotype of feingold syndrome-2. Am J Med Genet A 2015; 167A:3219-25. [PMID: 26360630 DOI: 10.1002/ajmg.a.37368] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 08/24/2015] [Indexed: 12/16/2022]
Abstract
Feingold syndrome-2 has been recently shown to be caused by germline heterozygous deletions of MIR17HG with 10 reported patients to date. Manifestations common to both Feingold syndrome-1 and Feingold syndrome-2 include microcephaly, short stature, and brachymesophalangy; but those with Feingold syndrome-2 lack gastrointestinal atresias. Here we describe a 14-year-old male patient who presented to our Cardiovascular Genetics Clinic with a history of a bicuspid aortic valve with aortic stenosis, short stature, hearing loss, and mild learning disabilities. Upon examination he was noted to have dysmorphic features and brachydactyly of his fingers and toes. His head circumference was 54.5 cm (25th-50th centile) and his height was 161.3 cm (31st centile) after growth hormone therapy. A skeletal survey noted numerous abnormalities prompting suspicion for Feingold syndrome. A comparative genomic hybridization microarray was completed and a ∼3.6 Mb interstitial heterozygous deletion at 13q31.3 including MIR17HG was found consistent with Feingold syndrome-2. Clinically, this patient has the characteristic digital anomalies and short stature often seen in Feingold syndrome-2 with less common features of a congenital heart defect and hearing loss. Although non-skeletal features have been occasionally reported in Feingold syndrome-1, only one other patient with a 13q31 microdeletion including MIR17HG has had non-skeletal manifestations. Additionally, our patient does not have microcephaly and, to our knowledge, is the first reported pediatric patient with Feingold syndrome-2 without this feature. This report illustrates significant phenotypic variability within the clinical presentation of Feingold syndrome-2 and highlights considerable overlap with Feingold syndrome-1.
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Affiliation(s)
- Lauren E Grote
- Division of Clinical Genetics, Children's Mercy Hospital, University of Missouri-Kansas City School of Medicine, Kansas City, Missouri
| | - Elena A Repnikova
- Cytogenetics and Molecular Genetics Laboratories, Children's Mercy Hospital, University of Missouri-Kansas City School of Medicine, Kansas City, Missouri
| | - Shivarajan M Amudhavalli
- Division of Clinical Genetics, Children's Mercy Hospital, University of Missouri-Kansas City School of Medicine, Kansas City, Missouri
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30
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Petroni M, Giannini G. A MYCN-MRN complex axis controls replication stress for the safe expansion of neuroprogenitor cells. Mol Cell Oncol 2015; 3:e1079673. [PMID: 27308604 DOI: 10.1080/23723556.2015.1079673] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 07/30/2015] [Accepted: 07/31/2015] [Indexed: 10/23/2022]
Abstract
DNA replication must be tightly regulated to ensure accurate duplication of the genome and its transfer to the daughter cells. When these regulatory mechanisms fail, replicative stress and DNA damage ensue, eventually leading to cell cycle inhibition or cell death. We have recently uncovered that MYCN-dependent expansion of neuroprogenitor cells is accompanied by replication stress, which is restrained by the MRN complex, a direct transcriptional target of the MYCN proto-oncogene.
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Affiliation(s)
| | - Giuseppe Giannini
- Istituto Pasteur-Fondazione Cenci Bolognetti, Dept. Molecular Medicine, University La Sapienza , Rome, Italy
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31
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Fiori E, Babicola L, Andolina D, Coassin A, Pascucci T, Patella L, Han YC, Ventura A, Ventura R. Neurobehavioral Alterations in a Genetic Murine Model of Feingold Syndrome 2. Behav Genet 2015; 45:547-59. [PMID: 26026879 PMCID: PMC4561592 DOI: 10.1007/s10519-015-9724-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 05/20/2015] [Indexed: 12/13/2022]
Abstract
Feingold syndrome (FS) is an autosomal dominant disorder characterized by microcephaly, short stature, digital anomalies, esophageal/duodenal atresia, facial dysmorphism, and various learning disabilities. Heterozygous deletion of the miR-17-92 cluster is responsible for a subset of FS (Feingold syndrome type 2, FS2), and the developmental abnormalities that characterize this disorder are partially recapitulated in mice that harbor a heterozygous deletion of this cluster (miR-17-92∆/+ mice). Although Feingold patients develop a wide array of learning disabilities, no scientific description of learning/cognitive disabilities, intellectual deficiency, and brain alterations have been described in humans and animal models of FS2. The aim of this study was to draw a behavioral profile, during development and in adulthood, of miR-17-92∆/+ mice, a genetic mouse model of FS2. Moreover, dopamine, norepinephrine and serotonin tissue levels in the medial prefrontal cortex (mpFC), and Hippocampus (Hip) of miR-17-92∆/+ mice were analyzed.Our data showed decreased body growth and reduced vocalization during development. Moreover, selective deficits in spatial ability, social novelty recognition and memory span were evident in adult miR-17-92∆/+ mice compared with healthy controls (WT). Finally, we found altered dopamine as well as serotonin tissue levels, in the mpFC and Hip, respectively, of miR-17-92∆/+ in comparison with WT mice, thus suggesting a possible link between cognitive deficits and altered brain neurotransmission.
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Affiliation(s)
- E. Fiori
- Dipartimento di Psicologia and Centro “Daniel Bovet”, Sapienza - Università di Roma, Rome, Italy
- Santa Lucia Foundation, European Centre for Brain Research (CERC), Via del Fosso di Fiorano, 64, 00143 Rome, Italy
| | - L. Babicola
- Santa Lucia Foundation, European Centre for Brain Research (CERC), Via del Fosso di Fiorano, 64, 00143 Rome, Italy
- Dipartimento di Scienze e Tecnologie Biomediche, Università dell’Aquila, L’Aquila, Italy
| | - D. Andolina
- Santa Lucia Foundation, European Centre for Brain Research (CERC), Via del Fosso di Fiorano, 64, 00143 Rome, Italy
- Dipartimento di Scienze e Tecnologie Biomediche, Università dell’Aquila, L’Aquila, Italy
| | - A. Coassin
- Dipartimento di Psicologia and Centro “Daniel Bovet”, Sapienza - Università di Roma, Rome, Italy
- Santa Lucia Foundation, European Centre for Brain Research (CERC), Via del Fosso di Fiorano, 64, 00143 Rome, Italy
| | - T. Pascucci
- Dipartimento di Psicologia and Centro “Daniel Bovet”, Sapienza - Università di Roma, Rome, Italy
- Santa Lucia Foundation, European Centre for Brain Research (CERC), Via del Fosso di Fiorano, 64, 00143 Rome, Italy
| | - L. Patella
- Santa Lucia Foundation, European Centre for Brain Research (CERC), Via del Fosso di Fiorano, 64, 00143 Rome, Italy
- Dipartimento di Scienze e Tecnologie Biomediche, Università dell’Aquila, L’Aquila, Italy
| | - Y.-C. Han
- Pfizer- Oncology, Pearl River, NY, USA
| | - A. Ventura
- Memorial Sloan-Kettering Cancer Center, Cancer Biology & Genetics Program, New York, NY, USA
| | - R. Ventura
- Santa Lucia Foundation, European Centre for Brain Research (CERC), Via del Fosso di Fiorano, 64, 00143 Rome, Italy
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32
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Tetralogy of Fallot, microcephaly, short stature and brachymesophalangy is associated with hemizygous loss of noncoding MIR17HG and coding GPC5. Clin Dysmorphol 2015; 24:113-4. [DOI: 10.1097/mcd.0000000000000069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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33
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Abstract
PURPOSE OF REVIEW Cystic kidney diseases are common renal disorders characterized by the formation of fluid-filled epithelial cysts in the kidneys. The progressive growth and expansion of the renal cysts replace existing renal tissue within the renal parenchyma, leading to reduced renal function. While several genes have been identified in association with inherited causes of cystic kidney disease, the molecular mechanisms that regulate these genes in the context of post-transcriptional regulation are still poorly understood. There is increasing evidence that microRNA (miRNA) dysregulation is associated with the pathogenesis of cystic kidney disease. RECENT FINDINGS In this review, recent studies that implicate dysregulation of miRNA expression in cystogenesis will be discussed. The relationship of specific miRNAs, such as the miR-17∼92 cluster and cystic kidney disease, miR-92a and von Hippel-Lindau syndrome, and alterations in LIN28-LET7 expression in Wilms tumor will be explored. SUMMARY At present, there are no specific treatments available for patients with cystic kidney disease. Understanding and identifying specific miRNAs involved in the pathogenesis of these disorders may have the potential to lead to the development of novel therapies and biomarkers.
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Díaz NF, Cruz-Reséndiz MS, Flores-Herrera H, García-López G, Molina-Hernández A. MicroRNAs in central nervous system development. Rev Neurosci 2014; 25:675-86. [PMID: 24902008 DOI: 10.1515/revneuro-2014-0014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 05/13/2014] [Indexed: 12/23/2022]
Abstract
During early and late embryo neurodevelopment, a large number of molecules work together in a spatial and temporal manner to ensure the adequate formation of an organism. Diverse signals participate in embryo patterning and organization synchronized by time and space. Among the molecules that are expressed in a temporal and spatial manner, and that are considered essential in several developmental processes, are the microRNAs (miRNAs). In this review, we highlight some important aspects of the biogenesis and function of miRNAs as well as their participation in ectoderm commitment and their role in central nervous system (CNS) development. Instead of giving an extensive list of miRNAs involved in these processes, we only mention those miRNAs that are the most studied during the development of the CNS as well as the most likely mRNA targets for each miRNA and its protein functions.
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Abnormal Sonic hedgehog signaling in the lung of rats with esophageal atresia induced by adriamycin. Pediatr Res 2014; 76:355-62. [PMID: 25003913 DOI: 10.1038/pr.2014.105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 04/17/2014] [Indexed: 11/08/2022]
Abstract
BACKGROUND Abnormal lung development was recently described in the rat model of esophageal atresia and tracheoesophageal fistula (EA-TEF). Since in this condition the ventral-to-dorsal switch of Shh expression in the foregut is disturbed, the present study tested the hypothesis that this abnormal expression at the emergence of the tracheobronchial bud might be translated into the developing lung. METHODS Pregnant rats received either 1.75 mg/kg i.p. adriamycin or vehicle from E7 to E9. Three groups were studied: control and adriamycin-exposed with and without EA-TEF. Embryos were recovered and the lungs were harvested and processed for reverse transcription polymerase chain reaction and immunofluorescence analysis of the Shh signaling cascade. RESULTS Shh signaling was downregulated at the late embryonic stage of lung development (E13) in embryos with EA-TEF. Throughout the subsequent stages of development, the expression of both Shh and its downstream components increased significantly and remained upregulated throughout gestation. Immunofluorescent localization was consistent with these findings. CONCLUSION Defective Shh signaling environment in the foregut is present beyond the emergence of lung buds and probably impairs lung development. Later in gestation, lungs exhibited a remarkable ability to upregulate the Shh cascade, suggesting a compensatory response. These findings may be relevant to understand pulmonary disease suffered by children with EA-TEF.
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Celli J. Genetics of gastrointestinal atresias. Eur J Med Genet 2014; 57:424-39. [DOI: 10.1016/j.ejmg.2014.06.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Accepted: 06/21/2014] [Indexed: 01/04/2023]
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Mogilyansky E, Rigoutsos I. The miR-17/92 cluster: a comprehensive update on its genomics, genetics, functions and increasingly important and numerous roles in health and disease. Cell Death Differ 2014; 20:1603-14. [PMID: 24212931 PMCID: PMC3824591 DOI: 10.1038/cdd.2013.125] [Citation(s) in RCA: 648] [Impact Index Per Article: 64.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 07/15/2013] [Accepted: 07/19/2013] [Indexed: 12/11/2022] Open
Abstract
The miR-17/92 cluster is among the best-studied microRNA clusters. Interest in the cluster and its members has been increasing steadily and the number of publications has grown exponentially since its discovery with more than 1000 articles published in 2012 alone. Originally found to be involved in tumorigenesis, research work in recent years has uncovered unexpected roles for its members in a wide variety of settings that include normal development, immune diseases, cardiovascular diseases, neurodegenerative diseases and aging. In light of its ever-increasing importance and ever-widening regulatory roles, we review here the latest body of knowledge on the cluster's involvement in health and disease as well as provide a novel perspective on the full spectrum of protein-coding and non-coding transcripts that are likely regulated by its members.
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Affiliation(s)
- E Mogilyansky
- Computational Medicine Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
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MicroRNAs: potential regulators of renal development genes that contribute to CAKUT. Pediatr Nephrol 2014; 29:565-74. [PMID: 23996519 PMCID: PMC3944105 DOI: 10.1007/s00467-013-2599-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 08/01/2013] [Accepted: 08/02/2013] [Indexed: 12/31/2022]
Abstract
Congenital anomalies of the kidney and urinary tract (CAKUT) are the leading cause of childhood chronic kidney disease (CKD). While mutations in several renal development genes have been identified as causes for CAKUT, most cases have not yet been linked to known mutations. Furthermore, the genotype-phenotype correlation is variable, suggesting that there might be additional factors that have an impact on the severity of CAKUT. MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression at the post-transcriptional level, and are involved in many developmental processes. Although little is known about the function of specific miRNAs in kidney development, several have recently been shown to regulate the expression of, and/or are regulated by, crucial renal development genes present in other organ systems. In this review, we discuss how miRNA regulation of common developmental signaling pathways may be applicable to renal development. We focus on genes that are known to contribute to CAKUT in humans, for which miRNA interactions in other contexts have been identified, with miRNAs that are present in the kidney. We hypothesize that miRNA-mediated processes might play a role in kidney development through similar mechanisms, and speculate that genotypic variations in these small RNAs or their targets could be associated with CAKUT.
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Marrone AK, Stolz DB, Bastacky SI, Kostka D, Bodnar AJ, Ho J. MicroRNA-17~92 is required for nephrogenesis and renal function. J Am Soc Nephrol 2014; 25:1440-52. [PMID: 24511118 DOI: 10.1681/asn.2013040390] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Deletion of all microRNAs (miRNAs) in nephron progenitors leads to premature loss of these cells, but the roles of specific miRNAs in progenitors have not been identified. Deletions in the MIR17HG cluster (miR-17~92 in mice), detected in a subset of patients with Feingold syndrome, represent the first miRNA mutations to be associated with a developmental defect in humans. Although MIR17HG is expressed in the developing kidney, and patients with Feingold syndrome caused by MYCN mutations have renal anomalies, it remains unclear to what extent MIR17HG contributes to renal development and function. To define the role of miR-17~92, we generated mice with a conditional deletion of miR-17~92 in nephron progenitors and their derivatives. The nephron progenitor population was preserved in these mice; however, this deletion impaired progenitor cell proliferation and reduced the number of developing nephrons. Postnatally, mutant mice developed signs of renal disease, including albuminuria by 6 weeks and focal podocyte foot process effacement and glomerulosclerosis at 3 months. Taken together, these data support a role for this miRNA cluster in renal development, specifically in the regulation of nephron development, with subsequent consequences for renal function in adult mice.
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Affiliation(s)
| | | | - Sheldon I Bastacky
- Department of Pathology, and University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania
| | - Dennis Kostka
- Departments of Developmental Biology and Computational Systems Biology, University of Pittsburgh School of Medicine, and
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Kawahara Y. Human diseases caused by germline and somatic abnormalities in microRNA and microRNA-related genes. Congenit Anom (Kyoto) 2014; 54:12-21. [PMID: 24330020 DOI: 10.1111/cga.12043] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Accepted: 11/29/2013] [Indexed: 12/12/2022]
Abstract
The human genome harbors approximately 2000 genes that encode microRNAs (miRNAs), small non-coding RNAs of approximately 20-22 nt that mediate post-transcriptional gene silencing. MiRNAs are generated from long transcripts through stepwise processing by the Drosha/DGCR8, Exportin-5/RanGTP and Dicer/TRBP complexes. Given that the expression of each individual miRNA is tightly regulated, the altered expression of certain miRNAs plays a pivotal role in human diseases. For instance, germline and somatic mutations in the genes encoding the miRNA processing machinery have been reported in different cancers. Furthermore, certain miRNA genes are encoded within regions that are deleted or duplicated in individuals with chromosomal abnormalities, and the fact that the knockout of these miRNAs in animal models results in lethality or the abnormal development of certain tissues indicates that these miRNA genes contribute to the disease phenotypes. It has also been reported that mutations in miRNA genes or in miRNA-binding sites, which result in the impairment of tight regulation of target mRNA expression, cause human genetic diseases, although these cases are rare. This is in contrast to the aberrant expression of certain miRNAs that results from the impairment of transcriptional or post-transcriptional regulation, which has been reported frequently in various human diseases. The present review focuses on human diseases caused by mutations in genes encoding miRNAs and the miRNA processing machinery as well as in miRNA-binding sites. Furthermore, human diseases caused by chromosomal abnormalities that involve the deletion or duplication of regions harboring genes that encode miRNAs or the miRNA processing machinery are also introduced.
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Affiliation(s)
- Yukio Kawahara
- Laboratory of RNA Function, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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41
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Fragoso AC, Tovar JA. The multifactorial origin of respiratory morbidity in patients surviving neonatal repair of esophageal atresia. Front Pediatr 2014; 2:39. [PMID: 24829898 PMCID: PMC4017156 DOI: 10.3389/fped.2014.00039] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 04/20/2014] [Indexed: 12/18/2022] Open
Abstract
Esophageal atresia with or without tracheoesophageal fistula (EA ± TEF) occurs in 1 out of every 3000 births. Current survival approaches 95%, and research is therefore focused on morbidity and health-related quality of life issues. Up to 50% of neonates with EA ± TEF have one or more additional malformations including those of the respiratory tract that occur in a relatively high proportion of them and particularly of those with vertebral, anal, cardiac, tracheoesophageal, renal, and limb association. Additionally, a significant proportion of survivors suffer abnormal pulmonary function and chronic respiratory tract disease. The present review summarizes the current knowledge about the nature of these symptoms in patients treated for EA ± TEF, and explores the hypothesis that disturbed development and maturation of the respiratory tract could contribute to their pathogenesis.
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Affiliation(s)
- Ana Catarina Fragoso
- INGEMM and Idipaz Research Laboratory, Department of Pediatric Surgery, Hospital Universitario La Paz , Madrid , Spain ; Department of Pediatrics, Universidad Autonoma de Madrid , Madrid , Spain ; Faculty of Medicine, University of Porto , Porto , Portugal
| | - Juan A Tovar
- INGEMM and Idipaz Research Laboratory, Department of Pediatric Surgery, Hospital Universitario La Paz , Madrid , Spain ; Department of Pediatrics, Universidad Autonoma de Madrid , Madrid , Spain
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Bednarczyk D, Smigiel R, Patkowski D, Laczmanska I, Lebioda A, Laczmanski L, Sasiadek MM. Normal exon copy number of the GLI2 and GLI3 genes in patients with esophageal atresia. Dis Esophagus 2013; 26:678-81. [PMID: 23442119 DOI: 10.1111/dote.12036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Esophageal atresia (EA) is a congenital developmental defect of the alimentary tract concerning the interruption of the esophagus with or without connection to the trachea. The incidence of EA is 1 in 3000-3500 of live-born infants, and occurs in both isolated and syndromic (in combination with abnormalities in other organ systems) forms. The molecular mechanisms underlying the development of EA are poorly understood. Knockout studies in mice indicate that genes like Sonic hedgehog, Gli2, and Gli3 play a role in the etiology of EA. These facts led us to hypothesize that Sonic hedgehog-GLI gene rearrangements are associated with EA in humans. To test this hypothesis, we screened patients with isolated and syndromic EA for GLI2 and/or GLI3 microrearrangements using methods to estimate the copy number (Multiplex Ligation-dependent Probe Amplification, real-time polymerase chain reaction). To our best knowledge this is the first study assessing copy number of GLI2 and GLI3 genes in patients with EA.
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Affiliation(s)
- D Bednarczyk
- Department of Genetics, Wroclaw Medical University, Wroclaw, Poland
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43
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Solomon BD, Bear KA, Kimonis V, de Klein A, Scott DA, Shaw-Smith C, Tibboel D, Reutter H, Giampietro PF. Clinical geneticists' views of VACTERL/VATER association. Am J Med Genet A 2012; 158A:3087-100. [PMID: 23165726 PMCID: PMC3507421 DOI: 10.1002/ajmg.a.35638] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 08/02/2012] [Indexed: 01/07/2023]
Abstract
VACTERL association (sometimes termed "VATER association" depending on which component features are included) is typically defined by the presence of at least three of the following congenital malformations, which tend to statistically co-occur in affected individuals: Vertebral anomalies, Anal atresia, Cardiac malformations, Tracheo-Esophageal fistula, Renal anomalies, and Limb abnormalities. Although the clinical criteria for VACTERL association may appear to be straightforward, there is wide variability in the way clinical geneticists define the disorder and the genetic testing strategy they use when confronted with an affected patient. In order to describe this variability and determine the most commonly used definitions and testing modalities, we present the results of survey responses by 121 clinical geneticists. We discuss the results of the survey responses, provide a literature review and commentary from a group of physicians who are currently involved in clinical and laboratory-based research on VACTERL association, and offer an algorithm for genetic testing in patients with this association.
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Affiliation(s)
- Benjamin D Solomon
- Medical Genetics Branch, National Human Genome Research Institute, Bethesda, Maryland, USA.
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44
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Chen CP, Lin SP, Chern SR, Wu PS, Chang SD, Ng SH, Liu YP, Su JW, Wang W. A de novo 4.4-Mb microdeletion in 2p24.3 → p24.2 in a girl with bilateral hearing impairment, microcephaly, digit abnormalities and Feingold syndrome. Eur J Med Genet 2012; 55:666-9. [DOI: 10.1016/j.ejmg.2012.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 07/05/2012] [Indexed: 10/28/2022]
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45
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Vidigal JA, Ventura A. Embryonic stem cell miRNAs and their roles in development and disease. Semin Cancer Biol 2012; 22:428-36. [PMID: 22561239 DOI: 10.1016/j.semcancer.2012.04.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2012] [Accepted: 04/17/2012] [Indexed: 01/07/2023]
Abstract
MicroRNAs have emerged as important modulators of gene expression. Both during development and disease, regulation by miRNAs controls the choice between self-renewal and differentiation, survival and apoptosis and dictates how cells respond to external stimuli. In mouse pluripotent embryonic stem cells, a surprisingly small set of miRNAs, encoded by four polycistronic genes is at the center of such decisions. miR-290-295, miR-302-367, miR-17-92 and miR-106b-25 encode for miRNAs with highly related sequences that seem to control largely overlapping gene sets. Recent studies have highlighted the importance of these miRNAs in the maintenance of 'stemness' and regulation of normal development and have linked the deregulation of their expression to a variety of human diseases.
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Affiliation(s)
- Joana Alves Vidigal
- Memorial Sloan-Kettering Cancer Center, Cancer Biology and Genetics Program, New York, NY 10065, United States
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46
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Abstract
Overwhelming experimental evidence accumulated over the past decade indicates that microRNAs (miRNAs) are key regulators of gene expression in animals and plants and play important roles in development, homeostasis, and disease. The miR-17-92 family of miRNA clusters is composed of 3 related, highly conserved, polycistronic miRNA genes that collectively encode for a total of 15 miRNAs. We discuss recent studies demonstrating that these miRNAs are essential for vertebrate development and homeostasis. We also show how their mutation or deregulation contributes to the pathogenesis of a variety of human diseases, including cancer and congenital developmental defects. Finally, we discuss the current evidence suggesting how the different miRNAs encoded by these 3 clusters can functionally cooperate to fine-tune signaling and developmental pathways.
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Affiliation(s)
- Carla P. Concepcion
- Memorial Sloan Kettering Cancer Center, Cancer Biology and Genetics Program 1275 York Avenue, New York, NY, 10065
| | - Ciro Bonetti
- Memorial Sloan Kettering Cancer Center, Cancer Biology and Genetics Program 1275 York Avenue, New York, NY, 10065
| | - Andrea Ventura
- Memorial Sloan Kettering Cancer Center, Cancer Biology and Genetics Program 1275 York Avenue, New York, NY, 10065
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47
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Iqbal Z, Neveling K, Razzaq A, Shahzad M, Zahoor MY, Qasim M, Gilissen C, Wieskamp N, Kwint MP, Gijsen S, de Brouwer APM, Veltman JA, Riazuddin S, van Bokhoven H. Targeted next generation sequencing reveals a novel intragenic deletion of the TPO gene in a family with intellectual disability. Arch Med Res 2012; 43:312-6. [PMID: 22387573 DOI: 10.1016/j.arcmed.2012.01.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Accepted: 01/18/2012] [Indexed: 11/19/2022]
Abstract
BACKGROUNDS AND AIMS Next generation sequencing (NGS) approaches have revolutionized the identification of mutations underlying genetic disorders. This technology is particularly useful for the identification of mutations in known and new genes for conditions with extensive genetic heterogeneity. In the present study we investigated a consanguineous Pakistani family with intellectual disability (ID). METHODS Genotyping was carried out using 250k and 6k SNP microarrays in order to perform homozygosity mapping and copy number variation (CNV) analysis. Targeted NGS was performed to identify the genetic defect in this family. qPCR was performed to validate and confirm the NGS result. RESULTS Homozygosity mapping positioned the causative defect on chromosome 2p25.3-p25.2. Subsequent targeted NGS revealed an intragenic deletion of five exons of the gene TPO. CONCLUSIONS NGS is a powerful method to uncover submicroscopic structural variations. This result demonstrates that an unbiased screening approach such as NGS can help to identify even unexpected disease-causing mutations.
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Affiliation(s)
- Zafar Iqbal
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, The Netherlands
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Amiel J, de Pontual L, Henrion-Caude A. miRNA, development and disease. ADVANCES IN GENETICS 2012; 80:1-36. [PMID: 23084872 DOI: 10.1016/b978-0-12-404742-6.00001-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jeanne Amiel
- Unité INSERM U781, Université Paris-Sorbonne Cité, Institut IMAGINE, France.
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49
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de Pontual L, Yao E, Callier P, Faivre L, Drouin V, Cariou S, Van Haeringen A, Geneviève D, Goldenberg A, Oufadem M, Manouvrier S, Munnich A, Vidigal JA, Vekemans M, Lyonnet S, Henrion-Caude A, Ventura A, Amiel J. Germline deletion of the miR-17∼92 cluster causes skeletal and growth defects in humans. Nat Genet 2011; 43:1026-30. [PMID: 21892160 PMCID: PMC3184212 DOI: 10.1038/ng.915] [Citation(s) in RCA: 233] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 07/29/2011] [Indexed: 12/27/2022]
Abstract
MicroRNAs (miRNAs) are key regulators of gene expression in animals and plants. Studies in a variety of model organisms show that miRNAs modulate developmental processes. To our knowledge, the only hereditary condition known to be caused by a miRNA is a form of adult-onset non-syndromic deafness, and no miRNA mutation has yet been found to be responsible for any developmental defect in humans. Here we report the identification of germline hemizygous deletions of MIR17HG, encoding the miR-17∼92 polycistronic miRNA cluster, in individuals with microcephaly, short stature and digital abnormalities. We demonstrate that haploinsufficiency of miR-17∼92 is responsible for these developmental abnormalities by showing that mice harboring targeted deletion of the miR-17∼92 cluster phenocopy several key features of the affected humans. These findings identify a regulatory function for miR-17∼92 in growth and skeletal development and represent the first example of an miRNA gene responsible for a syndromic developmental defect in humans.
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Affiliation(s)
- Loïc de Pontual
- Unité INSERM U-781, Université Paris Descartes, Paris, France
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50
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Abstract
VACTERL/VATER association is typically defined by the presence of at least three of the following congenital malformations: vertebral defects, anal atresia, cardiac defects, tracheo-esophageal fistula, renal anomalies, and limb abnormalities. In addition to these core component features, patients may also have other congenital anomalies. Although diagnostic criteria vary, the incidence is estimated at approximately 1 in 10,000 to 1 in 40,000 live-born infants. The condition is ascertained clinically by the presence of the above-mentioned malformations; importantly, there should be no clinical or laboratory-based evidence for the presence of one of the many similar conditions, as the differential diagnosis is relatively large. This differential diagnosis includes (but is not limited to) Baller-Gerold syndrome, CHARGE syndrome, Currarino syndrome, deletion 22q11.2 syndrome, Fanconi anemia, Feingold syndrome, Fryns syndrome, MURCS association, oculo-auriculo-vertebral syndrome, Opitz G/BBB syndrome, Pallister-Hall syndrome, Townes-Brocks syndrome, and VACTERL with hydrocephalus. Though there are hints regarding causation, the aetiology has been identified only in a small fraction of patients to date, likely due to factors such as a high degree of clinical and causal heterogeneity, the largely sporadic nature of the disorder, and the presence of many similar conditions. New genetic research methods offer promise that the causes of VACTERL association will be better defined in the relatively near future. Antenatal diagnosis can be challenging, as certain component features can be difficult to ascertain prior to birth. The management of patients with VACTERL/VATER association typically centers around surgical correction of the specific congenital anomalies (typically anal atresia, certain types of cardiac malformations, and/or tracheo-esophageal fistula) in the immediate postnatal period, followed by long-term medical management of sequelae of the congenital malformations. If optimal surgical correction is achievable, the prognosis can be relatively positive, though some patients will continue to be affected by their congenital malformations throughout life. Importantly, patients with VACTERL association do not tend to have neurocognitive impairment.
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MESH Headings
- Abnormalities, Multiple/diagnosis
- Abnormalities, Multiple/epidemiology
- Abnormalities, Multiple/genetics
- Abnormalities, Multiple/pathology
- Anal Canal/abnormalities
- Anal Canal/pathology
- Anus, Imperforate/complications
- Anus, Imperforate/diagnosis
- Anus, Imperforate/epidemiology
- Anus, Imperforate/genetics
- Anus, Imperforate/pathology
- Esophagus/abnormalities
- Esophagus/pathology
- Female
- Heart Defects, Congenital/complications
- Heart Defects, Congenital/diagnosis
- Heart Defects, Congenital/epidemiology
- Heart Defects, Congenital/genetics
- Heart Defects, Congenital/pathology
- Humans
- Infant, Newborn
- Kidney/abnormalities
- Kidney/pathology
- Limb Deformities, Congenital/complications
- Limb Deformities, Congenital/diagnosis
- Limb Deformities, Congenital/epidemiology
- Limb Deformities, Congenital/genetics
- Limb Deformities, Congenital/pathology
- Male
- Radius/abnormalities
- Radius/pathology
- Spine/abnormalities
- Spine/pathology
- Trachea/abnormalities
- Trachea/pathology
- Tracheoesophageal Fistula/complications
- Tracheoesophageal Fistula/epidemiology
- Tracheoesophageal Fistula/genetics
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Affiliation(s)
- Benjamin D Solomon
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Building 35/Room 1B-207, Bethesda, MD 20892, USA.
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