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Herwig A, Osterhof C, Keppner A, Maric D, Koay TW, Mbemba-Nsungi A, Hoogewijs D. Ectopic MYBL2-Mediated Regulation of Androglobin Gene Expression. Cells 2024; 13:826. [PMID: 38786048 PMCID: PMC11119863 DOI: 10.3390/cells13100826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 05/01/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024] Open
Abstract
Androglobin (ADGB) is a highly conserved and recently identified member of the globin superfamily. Although previous studies revealed a link to ciliogenesis and an involvement in murine spermatogenesis, its physiological function remains mostly unknown. Apart from FOXJ1-dependent regulation, the transcriptional landscape of the ADGB gene remains unexplored. We, therefore, aimed to obtain further insights into regulatory mechanisms governing ADGB expression. To this end, changes in ADGB promoter activity were examined using luciferase reporter gene assays in the presence of a set of more than 475 different exogenous transcription factors. MYBL2 and PITX2 resulted in the most pronounced increase in ADGB promoter-dependent luciferase activity. Subsequent truncation strategies of the ADGB promoter fragment narrowed down the potential MYBL2 and PITX2 binding sites within the proximal ADGB promoter. Furthermore, MYBL2 binding sites on the ADGB promoter were further validated via a guide RNA-mediated interference strategy using reporter assays. Chromatin immunoprecipitation (ChIP)-qPCR experiments illustrated enrichment of the endogenous ADGB promoter region upon MYBL2 and PITX2 overexpression. Consistently, ectopic MYBL2 expression induced endogenous ADGB mRNA levels. Collectively, our data indicate that ADGB is strongly regulated at the transcriptional level and might have functions beyond ciliogenesis.
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Affiliation(s)
| | | | | | | | | | | | - David Hoogewijs
- Department of Endocrinology, Metabolism and Cardiovascular System, University of Fribourg, 1700 Fribourg, Switzerland; (A.H.); (C.O.); (A.K.); (D.M.); (T.W.K.); (A.M.-N.)
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2
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Longtine C, Eliason CM, Mishkind D, Lee C, Chiappone M, Goller F, Love J, Kingsley EP, Clarke JA, Tabin CJ. Homology and the evolution of vocal folds in the novel avian voice box. Curr Biol 2024; 34:461-472.e7. [PMID: 38183987 DOI: 10.1016/j.cub.2023.12.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/29/2023] [Accepted: 12/06/2023] [Indexed: 01/08/2024]
Abstract
The origin of novel traits, those that are not direct modifications of a pre-existing ancestral structure, remains a fundamental problem in evolutionary biology. For example, little is known about the evolutionary and developmental origins of the novel avian vocal organ, the syrinx. Located at the tracheobronchial junction, the syrinx is responsible for avian vocalization, but it is unclear whether avian vocal folds are homologous to the laryngeal vocal folds in other tetrapods or convergently evolved. Here, we identify a core developmental program involved in avian vocal fold formation and infer the morphology of the syrinx of the ancestor of modern birds. We find that this ancestral syrinx had paired sound sources induced by a conserved developmental pathway and show that shifts in these signals correlate with syringeal diversification. We show that, despite being derived from different developmental tissues, vocal folds in the syrinx and larynx have similar tissue composition and are established through a strikingly similar developmental program, indicating that co-option of an ancestral developmental program facilitated the origin of vocal folds in the avian syrinx.
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Affiliation(s)
- Charlie Longtine
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Chad M Eliason
- The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA
| | - Darcy Mishkind
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - ChangHee Lee
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Michael Chiappone
- The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA
| | - Franz Goller
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA; Department of Zoophysiology, University of Münster, 48149 Münster, Germany
| | - Jay Love
- School of Biological Sciences, University of Utah, Salt Lake City, UT 84112, USA
| | - Evan P Kingsley
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
| | - Julia A Clarke
- The Jackson School of Geosciences and Department of Integrative Biology, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Clifford J Tabin
- Department of Genetics, Harvard Medical School, Boston, MA 02115, USA.
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3
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Shaikh Qureshi WM, Hentges KE. Functions of cilia in cardiac development and disease. Ann Hum Genet 2024; 88:4-26. [PMID: 37872827 PMCID: PMC10952336 DOI: 10.1111/ahg.12534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/08/2023] [Accepted: 10/02/2023] [Indexed: 10/25/2023]
Abstract
Errors in embryonic cardiac development are a leading cause of congenital heart defects (CHDs), including morphological abnormalities of the heart that are often detected after birth. In the past few decades, an emerging role for cilia in the pathogenesis of CHD has been identified, but this topic still largely remains an unexplored area. Mouse forward genetic screens and whole exome sequencing analysis of CHD patients have identified enrichment for de novo mutations in ciliary genes or non-ciliary genes, which regulate cilia-related pathways, linking cilia function to aberrant cardiac development. Key events in cardiac morphogenesis, including left-right asymmetric development of the heart, are dependent upon cilia function. Cilia dysfunction during left-right axis formation contributes to CHD as evidenced by the substantial proportion of heterotaxy patients displaying complex CHD. Cilia-transduced signaling also regulates later events during heart development such as cardiac valve formation, outflow tract septation, ventricle development, and atrioventricular septa formation. In this review, we summarize the role of motile and non-motile (primary cilia) in cardiac asymmetry establishment and later events during heart development.
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Affiliation(s)
- Wasay Mohiuddin Shaikh Qureshi
- Division of Evolution, Infection and Genomics, School of Biological Sciences, Faculty of Biology, Medicine, and Health, Manchester Academic Health Science CentreUniversity of ManchesterManchesterUK
| | - Kathryn E. Hentges
- Division of Evolution, Infection and Genomics, School of Biological Sciences, Faculty of Biology, Medicine, and Health, Manchester Academic Health Science CentreUniversity of ManchesterManchesterUK
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4
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Yoshida Y, Uchida K, Kodo K, Ishizaki-Asami R, Maeda J, Katsumata Y, Yuasa S, Fukuda K, Kosaki K, Watanabe Y, Nakagawa O, Yamagishi H. A genetic and developmental biological approach for a family with complex congenital heart diseases-evidence of digenic inheritance. Front Cardiovasc Med 2023; 10:1135141. [PMID: 37180804 PMCID: PMC10166836 DOI: 10.3389/fcvm.2023.1135141] [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: 12/31/2022] [Accepted: 04/10/2023] [Indexed: 05/16/2023] Open
Abstract
Objective Congenital heart disease (CHD) is caused by cardiovascular developmental defects and has a global prevalence of ∼1%. The etiology of CHD is multifactorial and remains generally unknown, despite advances in analytical techniques based on next-generation sequencing (NGS). The aim of our study was to elucidate the multi-genetic origin and pathogenesis of an intriguing familial case with complex CHD. Methods We performed an original trio-based gene panel analysis using NGS of the family, including two siblings with CHD of single ventricular phenotype, and their unaffected parents. The pathogenicity of the detected rare variants was investigated in silico, and the functional effects of the variants were confirmed in vitro using luciferase assays. The combinatorial effect of gene alterations of the putative responsible genes was tested in vivo using genetically engineered mutant mice. Results NGS-based gene panel analyses revealed two heterozygous rare variants in NODAL and in TBX20 common to the siblings and to just one of parents. Both variants were suspected pathogenic in silico, and decreased transcriptional activities of downstream signaling pathways were observed in vitro. The analyses of Nodal and Tbx20 double mutant mice demonstrated that Nodal+/-Tbx20-/- embryos showed more severe defects than Nodal+/+Tbx20-/- embryos during early heart development. The expression of Pitx2, a known downstream target of Nodal, was downregulated in Tbx20-/- mutants. Conclusions Two rare variants on NODAL and TBX20 genes detected in this family were considered to be loss-of-function mutations. Our results suggest that NODAL and TBX20 may be complementary for the cardiac development, and a combinatorial loss-of-function of NODAL and TBX20 could be implicated in digenic inherence as the etiology of complex CHD associated with single ventricle defects in this family.
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Affiliation(s)
- Yu Yoshida
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | - Keiko Uchida
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
- Health Center, Keio University, Kanagawa, Japan
| | - Kazuki Kodo
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | | | - Jun Maeda
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
| | | | - Shinsuke Yuasa
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Keiichi Fukuda
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Yusuke Watanabe
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Osamu Nakagawa
- Department of Molecular Physiology, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan
| | - Hiroyuki Yamagishi
- Department of Pediatrics, Keio University School of Medicine, Tokyo, Japan
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5
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Colleluori V, Khokha MK. Mink1 regulates spemann organizer cell fate in the xenopus gastrula via Hmga2. Dev Biol 2023; 495:42-53. [PMID: 36572140 PMCID: PMC10116378 DOI: 10.1016/j.ydbio.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 11/23/2022] [Accepted: 11/30/2022] [Indexed: 12/24/2022]
Abstract
Congenital Heart Disease (CHD) is the most common birth defect and leading cause of infant mortality, yet molecular mechanisms explaining CHD remain mostly unknown. Sequencing studies are identifying CHD candidate genes at a brisk rate including MINK1, a serine/threonine kinase. However, a plausible molecular mechanism connecting CHD and MINK1 is unknown. Here, we reveal that mink1 is required for proper heart development due to its role in left-right patterning. Mink1 regulates canonical Wnt signaling to define the cell fates of the Spemann Organizer and the Left-Right Organizer, a ciliated structure that breaks bilateral symmetry in the vertebrate embryo. To identify Mink1 targets, we applied an unbiased proteomics approach and identified the high mobility group architectural transcription factor, Hmga2. We report that Hmga2 is necessary and sufficient for regulating Spemann's Organizer. Indeed, we demonstrate that Hmga2 can induce Spemann Organizer cell fates even when β-catenin, a critical effector of the Wnt signaling pathway, is depleted. In summary, we discover a transcription factor, Hmga2, downstream of Mink1 that is critical for the regulation of Spemann's Organizer, as well as the LRO, defining a plausible mechanism for CHD.
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Affiliation(s)
- Vaughn Colleluori
- Pediatric Genomics Discovery Program, Department of Pediatrics and Genetics, Yale University School of Medicine, New Haven, CT, United States.
| | - Mustafa K Khokha
- Pediatric Genomics Discovery Program, Department of Pediatrics and Genetics, Yale University School of Medicine, New Haven, CT, United States
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6
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Restivo A, di Gioia C, Marino B, Putotto C. Transpositions of the great arteries versus aortic dextropositions. A review of some embryogenetic and morphological aspects. Anat Rec (Hoboken) 2023; 306:502-514. [PMID: 36426596 DOI: 10.1002/ar.25129] [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: 07/21/2022] [Revised: 10/15/2022] [Accepted: 10/18/2022] [Indexed: 11/27/2022]
Abstract
This review examines and discusses the morphology and embryology of two main groups of conotruncal cardiac malformations: (a) transposition of the great arteries (complete transposition and incomplete/partial transposition namely double outlet right ventricle), and (b) aortic dextroposition defects (tetralogy of Fallot and Eisenmenger malformation). In both groups, persistent truncus arteriosus was included because maldevelopment of the neural crest cell supply to the outflow tract, contributing to the production of the persistent truncus arteriosus, is shared by both groups of malformations. The potentially important role of the proximal conal cushions in the rotatory sequence of the conotruncus is emphasized. Most importantly, this study emphasizes the differentiation between the double-outlet right ventricle, which is a partial or incomplete transposition of the great arteries, and the Eisenmenger malformation, which is an aortic dextroposition. Special emphasis is also given to the leftward shift of the conoventricular junction, which covers an important morphogenetic role in both aortic dextropositions and transposition defects as well as in normal development, and whose molecular genetic regulation seems to remain unclear at present. Emphasis is placed on the distinct and overlapping roles of Tbx1 and Pitx2 transcription factors in modulating the development of the cardiac outflow tract.
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Affiliation(s)
- Angelo Restivo
- Pediatric Cardiology Unit, Department of Pediatrics, Obstetrics and Gynecology, Sapienza University of Rome, Rome, Italy.,Museum of Pathological Anatomy, Sapienza University of Rome, Rome, Italy
| | - Cira di Gioia
- Museum of Pathological Anatomy, Sapienza University of Rome, Rome, Italy.,Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Rome, Italy
| | - Bruno Marino
- Pediatric Cardiology Unit, Department of Pediatrics, Obstetrics and Gynecology, Sapienza University of Rome, Rome, Italy
| | - Carolina Putotto
- Pediatric Cardiology Unit, Department of Pediatrics, Obstetrics and Gynecology, Sapienza University of Rome, Rome, Italy
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7
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Yagi H, Lo CW. Left-Sided Heart Defects and Laterality Disturbance in Hypoplastic Left Heart Syndrome. J Cardiovasc Dev Dis 2023; 10:jcdd10030099. [PMID: 36975863 PMCID: PMC10054755 DOI: 10.3390/jcdd10030099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/29/2023] Open
Abstract
Hypoplastic left heart syndrome (HLHS) is a complex congenital heart disease characterized by hypoplasia of left-sided heart structures. The developmental basis for restriction of defects to the left side of the heart in HLHS remains unexplained. The observed clinical co-occurrence of rare organ situs defects such as biliary atresia, gut malrotation, or heterotaxy with HLHS would suggest possible laterality disturbance. Consistent with this, pathogenic variants in genes regulating left-right patterning have been observed in HLHS patients. Additionally, Ohia HLHS mutant mice show splenic defects, a phenotype associated with heterotaxy, and HLHS in Ohia mice arises in part from mutation in Sap130, a component of the Sin3A chromatin complex known to regulate Lefty1 and Snai1, genes essential for left-right patterning. Together, these findings point to laterality disturbance mediating the left-sided heart defects associated with HLHS. As laterality disturbance is also observed for other CHD, this suggests that heart development integration with left-right patterning may help to establish the left-right asymmetry of the cardiovascular system essential for efficient blood oxygenation.
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Affiliation(s)
- Hisato Yagi
- Department of Developmental Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15201, USA
| | - Cecilia W Lo
- Department of Developmental Biology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15201, USA
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8
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Forrest K, Barricella AC, Pohar SA, Hinman AM, Amack JD. Understanding laterality disorders and the left-right organizer: Insights from zebrafish. Front Cell Dev Biol 2022; 10:1035513. [PMID: 36619867 PMCID: PMC9816872 DOI: 10.3389/fcell.2022.1035513] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 12/12/2022] [Indexed: 12/24/2022] Open
Abstract
Vital internal organs display a left-right (LR) asymmetric arrangement that is established during embryonic development. Disruption of this LR asymmetry-or laterality-can result in congenital organ malformations. Situs inversus totalis (SIT) is a complete concordant reversal of internal organs that results in a low occurrence of clinical consequences. Situs ambiguous, which gives rise to Heterotaxy syndrome (HTX), is characterized by discordant development and arrangement of organs that is associated with a wide range of birth defects. The leading cause of health problems in HTX patients is a congenital heart malformation. Mutations identified in patients with laterality disorders implicate motile cilia in establishing LR asymmetry. However, the cellular and molecular mechanisms underlying SIT and HTX are not fully understood. In several vertebrates, including mouse, frog and zebrafish, motile cilia located in a "left-right organizer" (LRO) trigger conserved signaling pathways that guide asymmetric organ development. Perturbation of LRO formation and/or function in animal models recapitulates organ malformations observed in SIT and HTX patients. This provides an opportunity to use these models to investigate the embryological origins of laterality disorders. The zebrafish embryo has emerged as an important model for investigating the earliest steps of LRO development. Here, we discuss clinical characteristics of human laterality disorders, and highlight experimental results from zebrafish that provide insights into LRO biology and advance our understanding of human laterality disorders.
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Affiliation(s)
- Kadeen Forrest
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY, United States
| | - Alexandria C. Barricella
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY, United States
| | - Sonny A. Pohar
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY, United States
| | - Anna Maria Hinman
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY, United States
| | - Jeffrey D. Amack
- Department of Cell and Developmental Biology, State University of New York Upstate Medical University, Syracuse, NY, United States,BioInspired Syracuse: Institute for Material and Living Systems, Syracuse, NY, United States,*Correspondence: Jeffrey D. Amack,
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9
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Prieto JM, Wang AW, Halbach J, Cauvi DM, Day JMD, Gembicky M, Ghassemian M, Quehenberger O, Kling K, Ignacio R, DeMaio A, Bickler SW. Elemental, fatty acid, and protein composition of appendicoliths. Sci Rep 2022; 12:19764. [PMID: 36396724 PMCID: PMC9671961 DOI: 10.1038/s41598-022-21397-9] [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] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Accepted: 09/27/2022] [Indexed: 11/18/2022] Open
Abstract
Appendicoliths are commonly found obstructing the lumen of the appendix at the time of appendectomy. To identify factors that might contribute to their formation we investigated the composition of appendicoliths using laser ablation inductively coupled plasma mass spectroscopy, gas chromatography, polarized light microscopy, X-ray crystallography and protein mass spectroscopy. Forty-eight elements, 32 fatty acids and 109 human proteins were identified within the appendicoliths. The most common elements found in appendicoliths are calcium and phosphorus, 11.0 ± 6.0 and 8.2 ± 4.2% weight, respectively. Palmitic acid (29.7%) and stearate (21.3%) are the most common fatty acids. Some stearate is found in crystalline form-identifiable by polarized light microscopy and confirmable by X-ray crystallography. Appendicoliths have an increased ratio of omega-6 to omega-3 fatty acids (ratio 22:1). Analysis of 16 proteins common to the appendicoliths analyzed showed antioxidant activity and neutrophil functions (e.g. activation and degranulation) to be the most highly enriched pathways. Considered together, these preliminary findings suggest oxidative stress may have a role in appendicolith formation. Further research is needed to determine how dietary factors such as omega-6 fatty acids and food additives, redox-active metals and the intestinal microbiome interact with genetic factors to predispose to appendicolith formation.
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Affiliation(s)
- James M Prieto
- Division of Pediatric Surgery, Rady Children's Hospital, San Diego, CA, USA
- Naval Medical Center San Diego, San Diego, CA, USA
| | - Andrew W Wang
- Division of Pediatric Surgery, Rady Children's Hospital, San Diego, CA, USA
- Naval Medical Center San Diego, San Diego, CA, USA
| | - Jonathan Halbach
- Division of Pediatric Surgery, Rady Children's Hospital, San Diego, CA, USA
- Naval Medical Center San Diego, San Diego, CA, USA
| | - David M Cauvi
- Naval Medical Center San Diego, San Diego, CA, USA
- Center for Investigations of Health and Education Disparities, University of California San Diego, La Jolla, CA, USA
| | - James M D Day
- Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA
| | - Milan Gembicky
- Crystallography Facility, Department of Chemistry & Biochemistry, University of California San Diego, La Jolla, CA, USA
| | - Majid Ghassemian
- Biomolecular and Proteomics Mass Spectrometry Facility, University of California San Diego, La Jolla, CA, USA
| | | | - Karen Kling
- Division of Pediatric Surgery, Rady Children's Hospital, San Diego, CA, USA
- Department of Surgery, School of Medicine, University of California San Diego, 9500 Gilman Drive #0739, La Jolla, CA, 92093-0739, USA
| | - Romeo Ignacio
- Division of Pediatric Surgery, Rady Children's Hospital, San Diego, CA, USA
- Department of Surgery, School of Medicine, University of California San Diego, 9500 Gilman Drive #0739, La Jolla, CA, 92093-0739, USA
| | - Antonio DeMaio
- Department of Surgery, School of Medicine, University of California San Diego, 9500 Gilman Drive #0739, La Jolla, CA, 92093-0739, USA
- Center for Investigations of Health and Education Disparities, University of California San Diego, La Jolla, CA, USA
| | - Stephen W Bickler
- Division of Pediatric Surgery, Rady Children's Hospital, San Diego, CA, USA.
- Department of Surgery, School of Medicine, University of California San Diego, 9500 Gilman Drive #0739, La Jolla, CA, 92093-0739, USA.
- Center for Investigations of Health and Education Disparities, University of California San Diego, La Jolla, CA, USA.
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10
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Menon T, Burdine RD. A twist in Pitx2 regulation of gut looping. Dev Cell 2022; 57:2445-2446. [DOI: 10.1016/j.devcel.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Sanketi BD, Zuela-Sopilniak N, Bundschuh E, Gopal S, Hu S, Long J, Lammerding J, Hopyan S, Kurpios NA. Pitx2 patterns an accelerator-brake mechanical feedback through latent TGFβ to rotate the gut. Science 2022; 377:eabl3921. [PMID: 36137018 PMCID: PMC10089252 DOI: 10.1126/science.abl3921] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The vertebrate intestine forms by asymmetric gut rotation and elongation, and errors cause lethal obstructions in human infants. Rotation begins with tissue deformation of the dorsal mesentery, which is dependent on left-sided expression of the Paired-like transcription factor Pitx2. The conserved morphogen Nodal induces asymmetric Pitx2 to govern embryonic laterality, but organ-level regulation of Pitx2 during gut asymmetry remains unknown. We found Nodal to be dispensable for Pitx2 expression during mesentery deformation. Intestinal rotation instead required a mechanosensitive latent transforming growth factor-β (TGFβ), tuning a second wave of Pitx2 that induced reciprocal tissue stiffness in the left mesentery as mechanical feedback with the right side. This signaling regulator, an accelerator (right) and brake (left), combines biochemical and biomechanical inputs to break gut morphological symmetry and direct intestinal rotation.
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Affiliation(s)
- Bhargav D Sanketi
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Noam Zuela-Sopilniak
- Weill Institute for Cell and Molecular Biology and Department of Biomedical Engineering, Cornell University, Ithaca, NY 14850, USA
| | - Elizabeth Bundschuh
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Sharada Gopal
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Shing Hu
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Joseph Long
- Weill Institute for Cell and Molecular Biology and Department of Biomedical Engineering, Cornell University, Ithaca, NY 14850, USA
| | - Jan Lammerding
- Weill Institute for Cell and Molecular Biology and Department of Biomedical Engineering, Cornell University, Ithaca, NY 14850, USA
| | - Sevan Hopyan
- Program in Developmental and Stem Cell Biology, Research Institute, The Hospital for Sick Children, Toronto, Ontario M5G 0A4, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Natasza A Kurpios
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
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12
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Negretti MI, Böse N, Petri N, Kremnyov S, Tsikolia N. Nodal asymmetry and hedgehog signaling during vertebrate left–right symmetry breaking. Front Cell Dev Biol 2022; 10:957211. [PMID: 36172285 PMCID: PMC9511907 DOI: 10.3389/fcell.2022.957211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/04/2022] [Indexed: 11/13/2022] Open
Abstract
Development of visceral left–right asymmetry in bilateria is based on initial symmetry breaking followed by subsequent asymmetric molecular patterning. An important step is the left-sided expression of transcription factor pitx2 which is mediated by asymmetric expression of the nodal morphogen in the left lateral plate mesoderm of vertebrates. Processes leading to emergence of the asymmetric nodal domain differ depending on the mode of symmetry breaking. In Xenopus laevis and mouse embryos, the leftward fluid flow on the ventral surface of the left–right organizer leads through intermediate steps to enhanced activity of the nodal protein on the left side of the organizer and subsequent asymmetric nodal induction in the lateral plate mesoderm. In the chick embryo, asymmetric morphogenesis of axial organs leads to paraxial nodal asymmetry during the late gastrulation stage. Although it was shown that hedgehog signaling is required for initiation of the nodal expression, the mechanism of its asymmetry remains to be clarified. In this study, we established the activation of hedgehog signaling in early chick embryos to further study its role in the initiation of asymmetric nodal expression. Our data reveal that hedgehog signaling is sufficient to induce the nodal expression in competent domains of the chick embryo, while treatment of Xenopus embryos led to moderate nodal inhibition. We discuss the role of symmetry breaking and competence in the initiation of asymmetric gene expression.
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Affiliation(s)
| | - Nina Böse
- Anatomy and Embryology, University Medical Center Göttingen, Göttingen, Germany
| | - Natalia Petri
- Department of Embryology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Stanislav Kremnyov
- Department of Embryology, Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
- Koltzov Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia
| | - Nikoloz Tsikolia
- Anatomy and Embryology, University Medical Center Göttingen, Göttingen, Germany
- *Correspondence: Nikoloz Tsikolia,
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13
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Wang D, Hu X, Yang X, Yang M, Wu Q. Variants rs2200733 and rs6843082 Show Different Associations in Asian and Non-Asian Populations With Ischemic Stroke. Front Genet 2022; 13:905560. [PMID: 36061199 PMCID: PMC9435379 DOI: 10.3389/fgene.2022.905560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 05/30/2022] [Indexed: 11/14/2022] Open
Abstract
A previous genome-wide association study (GWAS) has reported that variants rs2200733 and rs6843082 in the paired-like homeodomain transcription factor 2 (PITX2) gene may be one of the risk factors for ischemic stroke (IS) in European populations. However, more recently, studies in Asia have reported that rs2200733 and rs6843082 are only weakly or not associated with increased risk of IS. This difference may be caused by the sample size and genetic heterogeneity of rs2200733 and rs6843082 among different races. For this study, we selected eight articles with nine studies from the PubMed and Embase databases, including five articles from Asian and three articles from non-Asian, to evaluate the risk of IS caused by rs2200733 and rs6843082. Then, we investigated rs2200733 and rs6843082 single-nucleotide polymorphisms (SNPs) by analysis using allele, recessive, dominant, and additive models. We identified that rs2200733 and rs6843082 are weakly significantly associated with IS for the allele model (p = 0.8), recessive model (p = 0.8), dominant model (p = 0.49), and additive model (p = 0.76) in a pooled population. Next, we performed a subgroup analysis of the population, the result of which showed that rs2200733 and rs6843082 covey genetic risk for IS in a non-Asian population, but not in an Asian population. In conclusion, our analysis shows that the effect of PITX2 rs2200733 and rs6843082 SNPs on IS risk in Asia is inconsistent with the effect observed in European IS cohorts.
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Affiliation(s)
- Dongsen Wang
- Clinical Medical College of Jining Medical University, Jining, China
- Department of Emergency, Jining No. 1 People’s Hospital, Jining, China
| | - Xuemei Hu
- Clinical Medical College of Jining Medical University, Jining, China
- Department of Emergency, Jining No. 1 People’s Hospital, Jining, China
| | - Xue Yang
- Department of Emergency, Jining No. 1 People’s Hospital, Jining, China
| | - Mingfeng Yang
- Second Affiliated Hospital, Key Laboratory of Cerebral Microcirculation in Universities of Shandong, Brain Science Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Taian, China
- *Correspondence: Mingfeng Yang, ; Qingjian Wu,
| | - Qingjian Wu
- Department of Emergency, Jining No. 1 People’s Hospital, Jining, China
- *Correspondence: Mingfeng Yang, ; Qingjian Wu,
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14
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Wang J, Yang Q, Tang M, Liu W. Validation and analysis of expression, prognosis and immune infiltration of WNT gene family in non-small cell lung cancer. Front Oncol 2022; 12:911316. [PMID: 35957916 PMCID: PMC9359207 DOI: 10.3389/fonc.2022.911316] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 06/28/2022] [Indexed: 11/13/2022] Open
Abstract
Early diagnosis and prognosis prediction of non-small cell lung cancer (NSCLC) have been challenging. Signaling cascades involving the Wingless-type (WNT) gene family play important biological roles and show prognostic value in various cancers, including NSCLC. On this basis, this study aimed to investigate the significance of WNTs in the prognosis and tumor immunity in NSCLC by comprehensive analysis. Expression and methylation levels of WNTs were obtained from the ONCOMINE, TIMER, and UALCAN. The dataset obtained from The Cancer Genome Atlas (TCGA) was utilized for prognostic analysis. cBioPortal was used to perform genetic alterations and correlation analysis of WNTs. R software was employed for functional enrichment and pathway analysis, partial statistics, and graph drawing. TRRUST was used to find key transcription factors. GEPIA was utilized for the analysis of expression, pathological staging, etc. Correlative analysis of immune infiltrates from TIMER. TISIDB was used for further immune infiltration validation analysis. Compared with that of normal tissues, WNT2/2B/3A/4/7A/9A/9B/11 expressions decreased, while WNT3/5B/6/7B/8B/10A/10B/16 expressions increased in lung adenocarcinoma (LUAD); WNT2/3A/7A/11 expressions were lessened, while WNT2B/3/5A/5B/6/7B/10A/10B/16 expressions were enhanced in squamous cell lung cancer (LUSC). Survival analysis revealed that highly expressed WNT2B and lowly expressed WNT7A predicted better prognostic outcomes in LUAD and LUSC. In the study of immune infiltration levels, WNT2, WNT9B, and WNT10A were positively correlated with six immune cells in LUAD; WNT1, WNT2, and WNT9B were positively correlated with six immune cells in LUSC, while WNT7B was negatively correlated. Our study indicated that WNT2B and WNT7A might have prognostic value in LUAD, and both of them might be important prognostic factors in LUSC and correlated to immune cell infiltration in LUAD and LUSC to a certain extent. Considering the prognostic value of WNT2B and WNT7A in NSCLC, we validated their mRNA and protein expression levels in NSCLC by performing qRT-PCR, western blot, and immunohistochemical staining on NSCLC pathological tissues and cell lines. This study may provide some direction for the subsequent exploration of the prognostic value of the WNTs and their role as biomarkers in NSCLC.
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Affiliation(s)
- Jianglin Wang
- Department of Pharmacy, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Qingping Yang
- Department of Pharmacy, Zunyi Medical University, Zunyi, China
| | - Mengjie Tang
- Department of Pathology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Wei Liu
- Department of Pharmacy, The Third Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Wei Liu,
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15
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Lozano-Velasco E, Garcia-Padilla C, del Mar Muñoz-Gallardo M, Martinez-Amaro FJ, Caño-Carrillo S, Castillo-Casas JM, Sanchez-Fernandez C, Aranega AE, Franco D. Post-Transcriptional Regulation of Molecular Determinants during Cardiogenesis. Int J Mol Sci 2022; 23:ijms23052839. [PMID: 35269981 PMCID: PMC8911333 DOI: 10.3390/ijms23052839] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/19/2022] [Accepted: 02/26/2022] [Indexed: 12/15/2022] Open
Abstract
Cardiovascular development is initiated soon after gastrulation as bilateral precardiac mesoderm is progressively symmetrically determined at both sides of the developing embryo. The precardiac mesoderm subsequently fused at the embryonic midline constituting an embryonic linear heart tube. As development progress, the embryonic heart displays the first sign of left-right asymmetric morphology by the invariably rightward looping of the initial heart tube and prospective embryonic ventricular and atrial chambers emerged. As cardiac development progresses, the atrial and ventricular chambers enlarged and distinct left and right compartments emerge as consequence of the formation of the interatrial and interventricular septa, respectively. The last steps of cardiac morphogenesis are represented by the completion of atrial and ventricular septation, resulting in the configuration of a double circuitry with distinct systemic and pulmonary chambers, each of them with distinct inlets and outlets connections. Over the last decade, our understanding of the contribution of multiple growth factor signaling cascades such as Tgf-beta, Bmp and Wnt signaling as well as of transcriptional regulators to cardiac morphogenesis have greatly enlarged. Recently, a novel layer of complexity has emerged with the discovery of non-coding RNAs, particularly microRNAs and lncRNAs. Herein, we provide a state-of-the-art review of the contribution of non-coding RNAs during cardiac development. microRNAs and lncRNAs have been reported to functional modulate all stages of cardiac morphogenesis, spanning from lateral plate mesoderm formation to outflow tract septation, by modulating major growth factor signaling pathways as well as those transcriptional regulators involved in cardiac development.
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Affiliation(s)
- Estefania Lozano-Velasco
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
- Fundación Medina, 18007 Granada, Spain
| | - Carlos Garcia-Padilla
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
- Department of Anatomy, Embryology and Zoology, School of Medicine, University of Extremadura, 06006 Badajoz, Spain
| | - Maria del Mar Muñoz-Gallardo
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
| | - Francisco Jose Martinez-Amaro
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
| | - Sheila Caño-Carrillo
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
| | - Juan Manuel Castillo-Casas
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
| | - Cristina Sanchez-Fernandez
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
- Fundación Medina, 18007 Granada, Spain
| | - Amelia E. Aranega
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
- Fundación Medina, 18007 Granada, Spain
| | - Diego Franco
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, 23071 Jaen, Spain; (E.L.-V.); (C.G.-P.); (M.d.M.M.-G.); (F.J.M.-A.); (S.C.-C.); (J.M.C.-C.); (C.S.-F.); (A.E.A.)
- Fundación Medina, 18007 Granada, Spain
- Correspondence:
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16
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Weidle UH, Nopora A. MicroRNAs and Corresponding Targets in Esophageal Cancer as Shown In Vitro and In Vivo in Preclinical Models. Cancer Genomics Proteomics 2022; 19:113-129. [PMID: 35181582 DOI: 10.21873/cgp.20308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/17/2022] [Accepted: 01/19/2022] [Indexed: 02/08/2023] Open
Abstract
Squamous cell carcinoma of the esophagus is associated with a dismal prognosis. Therefore, identification of new targets and implementation of new treatment modalities are issues of paramount importance. Based on a survey of the literature, we identified microRNAs conferring antitumoral activity in preclinical in vivo experiments. In the category of miRs targeting secreted factors and transmembrane receptors, four miRs were up-regulated and 10 were down-regulated compared with five out of nine in the category transcription factors, and six miRs were down-regulated in the category enzymes, including metabolic enzymes. The down-regulated miRs have targets which can be inhibited by small molecules or antibody-related entities, or re-expressed by reconstitution therapy. Up-regulated miRs have targets which can be reconstituted with small molecules or inhibited with antagomirs.
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Affiliation(s)
- Ulrich H Weidle
- Roche Pharma Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
| | - Adam Nopora
- Roche Pharma Research and Early Development, Roche Innovation Center Munich, Penzberg, Germany
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17
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Szenker-Ravi E, Ott T, Khatoo M, Moreau de Bellaing A, Goh WX, Chong YL, Beckers A, Kannesan D, Louvel G, Anujan P, Ravi V, Bonnard C, Moutton S, Schoen P, Fradin M, Colin E, Megarbane A, Daou L, Chehab G, Di Filippo S, Rooryck C, Deleuze JF, Boland A, Arribard N, Eker R, Tohari S, Ng AYJ, Rio M, Lim CT, Eisenhaber B, Eisenhaber F, Venkatesh B, Amiel J, Crollius HR, Gordon CT, Gossler A, Roy S, Attie-Bitach T, Blum M, Bouvagnet P, Reversade B. Discovery of a genetic module essential for assigning left-right asymmetry in humans and ancestral vertebrates. Nat Genet 2022; 54:62-72. [PMID: 34903892 DOI: 10.1038/s41588-021-00970-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 10/14/2021] [Indexed: 01/24/2023]
Abstract
The vertebrate left-right axis is specified during embryogenesis by a transient organ: the left-right organizer (LRO). Species including fish, amphibians, rodents and humans deploy motile cilia in the LRO to break bilateral symmetry, while reptiles, birds, even-toed mammals and cetaceans are believed to have LROs without motile cilia. We searched for genes whose loss during vertebrate evolution follows this pattern and identified five genes encoding extracellular proteins, including a putative protease with hitherto unknown functions that we named ciliated left-right organizer metallopeptide (CIROP). Here, we show that CIROP is specifically expressed in ciliated LROs. In zebrafish and Xenopus, CIROP is required solely on the left side, downstream of the leftward flow, but upstream of DAND5, the first asymmetrically expressed gene. We further ascertained 21 human patients with loss-of-function CIROP mutations presenting with recessive situs anomalies. Our findings posit the existence of an ancestral genetic module that has twice disappeared during vertebrate evolution but remains essential for distinguishing left from right in humans.
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Affiliation(s)
- Emmanuelle Szenker-Ravi
- Laboratory of Human Genetics and Therapeutics, Genome Institute of Singapore (GIS), A*STAR, Singapore, Singapore.
| | - Tim Ott
- Institute of Biology, University of Hohenheim, Stuttgart, Germany
| | - Muznah Khatoo
- Laboratory of Human Genetics and Therapeutics, Genome Institute of Singapore (GIS), A*STAR, Singapore, Singapore
| | - Anne Moreau de Bellaing
- Laboratoire de Cardiogénétique, Groupe Hospitalier Est, Hospices Civils de Lyon, Lyon, France
| | - Wei Xuan Goh
- Laboratory of Human Genetics and Therapeutics, Genome Institute of Singapore (GIS), A*STAR, Singapore, Singapore
| | - Yan Ling Chong
- Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore, Singapore
- Department of Pathology, National University Hospital, Singapore, Singapore
| | - Anja Beckers
- Institute for Molecular Biology, Hannover Medical School, Hannover, Germany
- REBIRTH Cluster of Excellence, Hannover, Germany
| | - Darshini Kannesan
- Laboratory of Human Genetics and Therapeutics, Genome Institute of Singapore (GIS), A*STAR, Singapore, Singapore
| | - Guillaume Louvel
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, CNRS, INSERM, PSL Research University, Paris, France
- Écologie, Systématique et Évolution, UMR 8079 CNRS - Université Paris-Saclay - AgroParisTech, Orsay, France
| | - Priyanka Anujan
- Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore, Singapore
- Institute of Reproductive and Developmental Biology, Hammersmith Hospital, Imperial College, London, UK
| | - Vydianathan Ravi
- Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore, Singapore
| | - Carine Bonnard
- Skin Research Institute of Singapore (SRIS), A*STAR, Singapore, Singapore
| | - Sébastien Moutton
- CPDPN, Pôle mère enfant, Maison de Santé Protestante Bordeaux Bagatelle, Talence, France
| | | | - Mélanie Fradin
- Service de Génétique Médicale, Hôpital Sud, CHU de Rennes, Rennes, France
| | - Estelle Colin
- Service de Génétique Médicale, CHU d'Angers, Angers, France
| | - André Megarbane
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon
- Institut Jérôme LEJEUNE, Paris, France
| | - Linda Daou
- Department of Pediatric Cardiology, Hôtel Dieu de France University Medical Center, Saint Joseph University, Alfred Naccache Boulevard, Achrafieh, Beirut, Lebanon
| | - Ghassan Chehab
- Department of Pediatric Cardiology, Hôtel Dieu de France University Medical Center, Saint Joseph University, Alfred Naccache Boulevard, Achrafieh, Beirut, Lebanon
- Department of Pediatrics, Lebanese University, Faculty of Medical Sciences, Hadath, Greater Beirut, Lebanon
| | - Sylvie Di Filippo
- Service de Cardiologie Pédiatrique, Groupe Hospitalier Est, Hospices Civils de Lyon, Bron, France
| | - Caroline Rooryck
- Service de Génétique, University of Bordeaux, MRGM, INSERM U1211, CHU de Bordeaux, Bordeaux, France
| | - Jean-François Deleuze
- Université Paris-Saclay, CEA, Centre National de Recherche en Génomique Humaine (CNRGH), Evry, France
| | - Anne Boland
- Université Paris-Saclay, CEA, Centre National de Recherche en Génomique Humaine (CNRGH), Evry, France
| | - Nicolas Arribard
- Service de Cardiologie Pédiatrique, Hôpital Universitaire des Enfants Reine Fabiola (HUDERF), Brussels, Belgium
| | - Rukiye Eker
- Pediatrics Department, Pediatric Cardiology Division, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Sumanty Tohari
- Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore, Singapore
| | - Alvin Yu-Jin Ng
- Molecular Diagnosis Centre (MDC), National University Hospital (NUH), Singapore, Singapore
| | - Marlène Rio
- Fédération de Génétique, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Developmental Brain Disorders Laboratory, Université de Paris, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Chun Teck Lim
- Bioinformatics Institute (BII), A*STAR, Singapore, Singapore
- Singapore Institute of Food and Biotechnology Innovation (SIFBI), A*STAR, Singapore, Singapore
| | - Birgit Eisenhaber
- Bioinformatics Institute (BII), A*STAR, Singapore, Singapore
- Genome Institute of Singapore (GIS), A*STAR, Singapore, Singapore
| | - Frank Eisenhaber
- Bioinformatics Institute (BII), A*STAR, Singapore, Singapore
- Genome Institute of Singapore (GIS), A*STAR, Singapore, Singapore
- School of Biological Sciences (SBS), Nanyang Technological University (NTU), Singapore, Singapore
| | - Byrappa Venkatesh
- Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore, Singapore
- Department of Pediatrics, National University of Singapore (NUS), Singapore, Singapore
| | - Jeanne Amiel
- Fédération de Génétique, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Laboratory of Embryology and Genetics of Malformations, Université de Paris, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Hugues Roest Crollius
- Institut de Biologie de l'Ecole Normale Supérieure (IBENS), Ecole Normale Supérieure, CNRS, INSERM, PSL Research University, Paris, France
| | - Christopher T Gordon
- Laboratory of Embryology and Genetics of Malformations, Université de Paris, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Achim Gossler
- Institute for Molecular Biology, Hannover Medical School, Hannover, Germany
- REBIRTH Cluster of Excellence, Hannover, Germany
| | - Sudipto Roy
- Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore, Singapore
- Department of Pediatrics, National University of Singapore (NUS), Singapore, Singapore
- Department of Biological Sciences, National University of Singapore (NUS), Singapore, Singapore
| | - Tania Attie-Bitach
- Fédération de Génétique, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Laboratory of Genetics and Development of the Cerebral Cortex, Université de Paris, Imagine Institute, INSERM UMR 1163, Paris, France
| | - Martin Blum
- Institute of Biology, University of Hohenheim, Stuttgart, Germany.
| | | | - Bruno Reversade
- Laboratory of Human Genetics and Therapeutics, Genome Institute of Singapore (GIS), A*STAR, Singapore, Singapore.
- Institute of Molecular and Cell Biology (IMCB), A*STAR, Singapore, Singapore.
- Department of Pediatrics, National University of Singapore (NUS), Singapore, Singapore.
- Medical Genetics Department, Koç University School of Medicine (KUSOM), Istanbul, Turkey.
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18
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Hu S, Mahadevan A, Elysee IF, Choi J, Souchet NR, Bae GH, Taboada AK, Sanketi B, Duhamel GE, Sevier CS, Tao G, Kurpios NA. The asymmetric Pitx2 gene regulates gut muscular-lacteal development and protects against fatty liver disease. Cell Rep 2021; 37:110030. [PMID: 34818545 PMCID: PMC8650168 DOI: 10.1016/j.celrep.2021.110030] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 08/19/2021] [Accepted: 10/29/2021] [Indexed: 12/25/2022] Open
Abstract
Intestinal lacteals are essential lymphatic channels for absorption and transport of dietary lipids and drive the pathogenesis of debilitating metabolic diseases. However, organ-specific mechanisms linking lymphatic dysfunction to disease etiology remain largely unknown. In this study, we uncover an intestinal lymphatic program that is linked to the left-right (LR) asymmetric transcription factor Pitx2. We show that deletion of the asymmetric Pitx2 enhancer ASE alters normal lacteal development through the lacteal-associated contractile smooth muscle lineage. ASE deletion leads to abnormal muscle morphogenesis induced by oxidative stress, resulting in impaired lacteal extension and defective lymphatic system-dependent lipid transport. Surprisingly, activation of lymphatic system-independent trafficking directs dietary lipids from the gut directly to the liver, causing diet-induced fatty liver disease. Our study reveals the molecular mechanism linking gut lymphatic function to the earliest symmetry-breaking Pitx2 and highlights the important relationship between intestinal lymphangiogenesis and the gut-liver axis.
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Affiliation(s)
- Shing Hu
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Aparna Mahadevan
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Isaac F Elysee
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Joseph Choi
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Nathan R Souchet
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Gloria H Bae
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Alessandra K Taboada
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Bhargav Sanketi
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Gerald E Duhamel
- Department of Biomedical Sciences, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Carolyn S Sevier
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA
| | - Ge Tao
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Natasza A Kurpios
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell, Ithaca, NY 14853, USA.
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19
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Tran TQ, Kioussi C. Pitx genes in development and disease. Cell Mol Life Sci 2021; 78:4921-4938. [PMID: 33844046 PMCID: PMC11073205 DOI: 10.1007/s00018-021-03833-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 03/05/2021] [Accepted: 03/31/2021] [Indexed: 12/17/2022]
Abstract
Homeobox genes encode sequence-specific transcription factors (SSTFs) that recognize specific DNA sequences and regulate organogenesis in all eukaryotes. They are essential in specifying spatial and temporal cell identity and as a result, their mutations often cause severe developmental defects. Pitx genes belong to the PRD class of the highly evolutionary conserved homeobox genes in all animals. Vertebrates possess three Pitx paralogs, Pitx1, Pitx2, and Pitx3 while non-vertebrates have only one Pitx gene. The ancient role of regulating left-right (LR) asymmetry is conserved while new functions emerge to afford more complex body plan and functionalities. In mouse, Pitx1 regulates hindlimb tissue patterning and pituitary development. Pitx2 is essential for the development of the oral cavity and abdominal wall while regulates the formation and symmetry of other organs including pituitary, heart, gut, lung among others by controlling growth control genes upon activation of the Wnt/ß-catenin signaling pathway. Pitx3 is essential for lens development and migration and survival of the dopaminergic neurons of the substantia nigra. Pitx gene mutations are linked to various congenital defects and cancers in humans. Pitx gene family has the potential to offer a new approach in regenerative medicine and aid in identifying new drug targets.
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Affiliation(s)
- Thai Q Tran
- Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR, 97331, USA
| | - Chrissa Kioussi
- Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, OR, 97331, USA.
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20
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Abstract
Cardiac development is a complex developmental process that is initiated soon after gastrulation, as two sets of precardiac mesodermal precursors are symmetrically located and subsequently fused at the embryonic midline forming the cardiac straight tube. Thereafter, the cardiac straight tube invariably bends to the right, configuring the first sign of morphological left–right asymmetry and soon thereafter the atrial and ventricular chambers are formed, expanded and progressively septated. As a consequence of all these morphogenetic processes, the fetal heart acquired a four-chambered structure having distinct inlet and outlet connections and a specialized conduction system capable of directing the electrical impulse within the fully formed heart. Over the last decades, our understanding of the morphogenetic, cellular, and molecular pathways involved in cardiac development has exponentially grown. Multiples aspects of the initial discoveries during heart formation has served as guiding tools to understand the etiology of cardiac congenital anomalies and adult cardiac pathology, as well as to enlighten novels approaches to heal the damaged heart. In this review we provide an overview of the complex cellular and molecular pathways driving heart morphogenesis and how those discoveries have provided new roads into the genetic, clinical and therapeutic management of the diseased hearts.
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21
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Little RB, Norris DP. Right, left and cilia: How asymmetry is established. Semin Cell Dev Biol 2021; 110:11-18. [PMID: 32571625 DOI: 10.1016/j.semcdb.2020.06.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 12/13/2022]
Abstract
The initial breaking of left-right (L-R) symmetry in the embryo is controlled by a motile-cilia-driven leftward fluid flow in the left-right organiser (LRO), resulting in L-R asymmetric gene expression flanking the LRO. Ultimately this results in left- but not right-sided activation of the Nodal-Pitx2 pathway in more lateral tissues. While aspects of the initial breaking event clearly vary between vertebrates, events in the Lateral Plate Mesoderm (LPM) are conserved through the vertebrate lineage. Evidence from model systems and humans highlights the role of cilia both in the initial symmetry breaking and in the ability of more lateral tissues to exhibit asymmetric gene expression. In this review we concentrate on the process of L-R determination in mouse and humans.
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Affiliation(s)
- Rosie B Little
- MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, UK
| | - Dominic P Norris
- MRC Harwell Institute, Harwell Campus, Oxfordshire, OX11 0RD, UK.
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22
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Grzymkowski J, Wyatt B, Nascone-Yoder N. The twists and turns of left-right asymmetric gut morphogenesis. Development 2020; 147:147/19/dev187583. [PMID: 33046455 DOI: 10.1242/dev.187583] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Many organs develop left-right asymmetric shapes and positions that are crucial for normal function. Indeed, anomalous laterality is associated with multiple severe birth defects. Although the events that initially orient the left-right body axis are beginning to be understood, the mechanisms that shape the asymmetries of individual organs remain less clear. Here, we summarize new evidence challenging century-old ideas about the development of stomach and intestine laterality. We compare classical and contemporary models of asymmetric gut morphogenesis and highlight key unanswered questions for future investigation.
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Affiliation(s)
- Julia Grzymkowski
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
| | - Brent Wyatt
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
| | - Nanette Nascone-Yoder
- Department of Molecular Biomedical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27607, USA
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23
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Rahman T, Zhang H, Fan J, Wan LQ. Cell chirality in cardiovascular development and disease. APL Bioeng 2020; 4:031503. [PMID: 32903894 PMCID: PMC7449703 DOI: 10.1063/5.0014424] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/11/2020] [Indexed: 12/15/2022] Open
Abstract
The cardiovascular system demonstrates left-right (LR) asymmetry: most notably, the LR asymmetric looping of the bilaterally symmetric linear heart tube. Similarly, the orientation of the aortic arch is asymmetric as well. Perturbations to the asymmetry have been associated with several congenital heart malformations and vascular disorders. The source of the asymmetry, however, is not clear. Cell chirality, a recently discovered and intrinsic LR asymmetric cellular morphological property, has been implicated in the heart looping and vascular barrier function. In this paper, we summarize recent advances in the field of cell chirality and describe various approaches developed for studying cell chirality at multi- and single-cell levels. We also examine research progress in asymmetric cardiovascular development and associated malformations. Finally, we review evidence connecting cell chirality to cardiac looping and vascular permeability and provide thoughts on future research directions for cell chirality in the context of cardiovascular development and disease.
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Affiliation(s)
- Tasnif Rahman
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - Haokang Zhang
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
| | - Jie Fan
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, USA
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24
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Naaraayan A, Nimkar A, Acharya P, Pomerantz D, Jesmajian S. Dextrocardia: When right is wrong! J Atr Fibrillation 2020; 13:2222. [PMID: 34950286 DOI: 10.4022/jafib.2222] [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: 08/15/2019] [Revised: 08/26/2019] [Accepted: 09/29/2019] [Indexed: 11/10/2022]
Abstract
Introduction/Background Dextrocardia is a malposition of the heart in the thoracic cavity. Dextrocardia has been known to cause diagnostic dilemmas with atypical presentations in acute coronary syndrome, as well as technical challenges in patients who require interventions such as coronary catheterization, transcutaneous aortic valve replacement, ablation for arrhythmias, or pacemaker/defibrillator placement. Transcription factor Pitx2 has been shown to have a fundamental role during cardio-genesis, and its misexpression has been implicated in arrhythmogenesis and congenital heart diseases including visceral situs inversus. This association between congenital heart diseases and arrythmias is intriguing and need exploring. We aimed to quantify the likelihood of arrhythmias in patients with dextrocardia. Materials and Methods A descriptive, retrospective study was conducted on the National Inpatient Sample (NIS) databases for the year 2016. Patients with dextrocardia and arrhythmias were selected based on appropriate diagnostic codes. We used propensity score-matching to assemble a matched cohort in which adults with dextrocardia and controls balanced on measured baseline characteristics. This was done to reduce the confounding effect of between-group imbalances on outcomes. Complex survey design, weights, and clustering were accounted for during analysis. Multivariate regression analysis was performed to determine the relationship of arrhythmias and length of hospitalization with dextrocardia. Results The prevalence of arrhythmias in patients with dextrocardia was significantly higher than the control group. Overall, the odds of arrhythmia were higher for patients in the dextrocardia group when compared to a propensity matched control group [adjusted Odds ratio OR 2.60, Confidence Interval (CI) (1.67-4.06), p<0.001]. When looking at only principal/primary diagnosis on admission, the odds of an admitting diagnosis of arrhythmia were significantly higher in the dextrocardia group when compared to the matched cohort [adjusted OR 3.70, CI (1.26-10.89), p 0.02]. The increased odds of arrhythmia in dextrocardia patients were mostly accounted for by the increased odds of atrial fibrillation/atrial flutter [OR 3.06, CI (1.02-9.18), p 0.046] in these patients. No significant difference was found in the odds of other arrhythmias or the length of stay between the two groups. Conclusion In a large inpatient population, patients with dextrocardia were more likely to have arrhythmias especially atrial fibrillation/atrial flutter than patients without dextrocardia. Ours is the first study that investigates the clinical manifestations of molecular and embryologic associations between congenital heart disease and arrhythmias.
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Affiliation(s)
- Ashutossh Naaraayan
- Montefiore New Rochelle Hospital, Albert Einstein College of Medicine, New Rochelle, NY 10801
| | - Abhishek Nimkar
- Montefiore New Rochelle Hospital, Albert Einstein College of Medicine, New Rochelle, NY 10801
| | - Prakash Acharya
- Montefiore New Rochelle Hospital, Albert Einstein College of Medicine, New Rochelle, NY 10801
| | - Daniel Pomerantz
- Montefiore New Rochelle Hospital, Albert Einstein College of Medicine, New Rochelle, NY 10801
| | - Stephen Jesmajian
- Montefiore New Rochelle Hospital, Albert Einstein College of Medicine, New Rochelle, NY 10801
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25
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Abstract
Comparative studies on brain asymmetry date back to the 19th century but then largely disappeared due to the assumption that lateralization is uniquely human. Since the reemergence of this field in the 1970s, we learned that left-right differences of brain and behavior exist throughout the animal kingdom and pay off in terms of sensory, cognitive, and motor efficiency. Ontogenetically, lateralization starts in many species with asymmetrical expression patterns of genes within the Nodal cascade that set up the scene for later complex interactions of genetic, environmental, and epigenetic factors. These take effect during different time points of ontogeny and create asymmetries of neural networks in diverse species. As a result, depending on task demands, left- or right-hemispheric loops of feedforward or feedback projections are then activated and can temporarily dominate a neural process. In addition, asymmetries of commissural transfer can shape lateralized processes in each hemisphere. It is still unclear if interhemispheric interactions depend on an inhibition/excitation dichotomy or instead adjust the contralateral temporal neural structure to delay the other hemisphere or synchronize with it during joint action. As outlined in our review, novel animal models and approaches could be established in the last decades, and they already produced a substantial increase of knowledge. Since there is practically no realm of human perception, cognition, emotion, or action that is not affected by our lateralized neural organization, insights from these comparative studies are crucial to understand the functions and pathologies of our asymmetric brain.
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Affiliation(s)
- Onur Güntürkün
- Department of Biopsychology, Institute of Cognitive Neuroscience, Ruhr University Bochum, Bochum, Germany
| | - Felix Ströckens
- Department of Biopsychology, Institute of Cognitive Neuroscience, Ruhr University Bochum, Bochum, Germany
| | - Sebastian Ocklenburg
- Department of Biopsychology, Institute of Cognitive Neuroscience, Ruhr University Bochum, Bochum, Germany
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26
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Shiromizu T, Yuge M, Kasahara K, Yamakawa D, Matsui T, Bessho Y, Inagaki M, Nishimura Y. Targeting E3 Ubiquitin Ligases and Deubiquitinases in Ciliopathy and Cancer. Int J Mol Sci 2020; 21:E5962. [PMID: 32825105 PMCID: PMC7504095 DOI: 10.3390/ijms21175962] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/16/2020] [Accepted: 08/17/2020] [Indexed: 12/17/2022] Open
Abstract
Cilia are antenna-like structures present in many vertebrate cells. These organelles detect extracellular cues, transduce signals into the cell, and play an essential role in ensuring correct cell proliferation, migration, and differentiation in a spatiotemporal manner. Not surprisingly, dysregulation of cilia can cause various diseases, including cancer and ciliopathies, which are complex disorders caused by mutations in genes regulating ciliary function. The structure and function of cilia are dynamically regulated through various mechanisms, among which E3 ubiquitin ligases and deubiquitinases play crucial roles. These enzymes regulate the degradation and stabilization of ciliary proteins through the ubiquitin-proteasome system. In this review, we briefly highlight the role of cilia in ciliopathy and cancer; describe the roles of E3 ubiquitin ligases and deubiquitinases in ciliogenesis, ciliopathy, and cancer; and highlight some of the E3 ubiquitin ligases and deubiquitinases that are potential therapeutic targets for these disorders.
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Affiliation(s)
- Takashi Shiromizu
- Department of Integrative Pharmacology, Graduate School of Medicine, Mie University, Tsu, Mie 514-8507, Japan; (T.S.); (M.Y.)
| | - Mizuki Yuge
- Department of Integrative Pharmacology, Graduate School of Medicine, Mie University, Tsu, Mie 514-8507, Japan; (T.S.); (M.Y.)
| | - Kousuke Kasahara
- Department of Physiology, Graduate School of Medicine, Mie University, Tsu, Mie 514-5807, Japan; (K.K.); (D.Y.); (M.I.)
| | - Daishi Yamakawa
- Department of Physiology, Graduate School of Medicine, Mie University, Tsu, Mie 514-5807, Japan; (K.K.); (D.Y.); (M.I.)
| | - Takaaki Matsui
- Gene Regulation Research, Division of Biological Sciences, Nara Institute of Science and Technology, Takayama, Nara 630-0192, Japan; (T.M.); (Y.B.)
| | - Yasumasa Bessho
- Gene Regulation Research, Division of Biological Sciences, Nara Institute of Science and Technology, Takayama, Nara 630-0192, Japan; (T.M.); (Y.B.)
| | - Masaki Inagaki
- Department of Physiology, Graduate School of Medicine, Mie University, Tsu, Mie 514-5807, Japan; (K.K.); (D.Y.); (M.I.)
| | - Yuhei Nishimura
- Department of Integrative Pharmacology, Graduate School of Medicine, Mie University, Tsu, Mie 514-8507, Japan; (T.S.); (M.Y.)
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27
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Daems M, Peacock HM, Jones EAV. Fluid flow as a driver of embryonic morphogenesis. Development 2020; 147:147/15/dev185579. [PMID: 32769200 DOI: 10.1242/dev.185579] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fluid flow is a powerful morphogenic force during embryonic development. The physical forces created by flowing fluids can either create morphogen gradients or be translated by mechanosensitive cells into biological changes in gene expression. In this Primer, we describe how fluid flow is created in different systems and highlight the important mechanosensitive signalling pathways involved for sensing and transducing flow during embryogenesis. Specifically, we describe how fluid flow helps establish left-right asymmetry in the early embryo and discuss the role of flow of blood, lymph and cerebrospinal fluid in sculpting the embryonic cardiovascular and nervous system.
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Affiliation(s)
- Margo Daems
- Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology, KU Leuven, 3000 Leuven, Belgium
| | - Hanna M Peacock
- Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology, KU Leuven, 3000 Leuven, Belgium
| | - Elizabeth A V Jones
- Department of Cardiovascular Sciences, Centre for Molecular and Vascular Biology, KU Leuven, 3000 Leuven, Belgium
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28
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Almeida FV, Gammon L, Laly AC, Pundel OJ, Bishop CL, Connelly JT. High-Content Analysis of Cell Migration Dynamics within a Micropatterned Screening Platform. ACTA ACUST UNITED AC 2020; 3:e1900011. [PMID: 32648701 DOI: 10.1002/adbi.201900011] [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: 01/15/2019] [Revised: 05/31/2019] [Indexed: 01/04/2023]
Abstract
Cell migration is a fundamental biological process that is dynamically regulated by complex interactions between the microenvironment and intrinsic gene expression programs. Here, a high-throughput cell migration assay is developed using micropatterned and dynamically adhesive polymer brush substrates, which support highly precise and consistent control over cell-matrix interactions within a 96-well cell culture plate format. This system is combined with automated imaging and quantitation of both cell motility and organization of the F-actin cytoskeleton for high-content analysis of cell migration phenotypes. Using this platform to screen a library of 147 epigenetic inhibitors identifies a set of EZH2-specific compounds that promote cytoskeletal remodeling and accelerates keratinocyte migration through derepression of an epithelial to mesenchymal transition-like gene expression program. Together, these studies establish the high-throughput, micropatterned assay as a powerful tool for discovery of novel therapeutic targets and for dissecting complex gene-environment interactions involved in wound repair.
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Affiliation(s)
- Filipe V Almeida
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Luke Gammon
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Ana C Laly
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Oscar J Pundel
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - Cleo L Bishop
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - John T Connelly
- Centre for Cell Biology and Cutaneous Research, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
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29
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Kostouros A, Koliarakis I, Natsis K, Spandidos DA, Tsatsakis A, Tsiaoussis J. Large intestine embryogenesis: Molecular pathways and related disorders (Review). Int J Mol Med 2020; 46:27-57. [PMID: 32319546 PMCID: PMC7255481 DOI: 10.3892/ijmm.2020.4583] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 04/08/2020] [Indexed: 02/07/2023] Open
Abstract
The large intestine, part of the gastrointestinal tract (GI), is composed of all three germ layers, namely the endoderm, the mesoderm and the ectoderm, forming the epithelium, the smooth muscle layers and the enteric nervous system, respectively. Since gastrulation, these layers develop simultaneously during embryogenesis, signaling to each other continuously until adult age. Two invaginations, the anterior intestinal portal (AIP) and the caudal/posterior intestinal portal (CIP), elongate and fuse, creating the primitive gut tube, which is then patterned along the antero‑posterior (AP) axis and the radial (RAD) axis in the context of left‑right (LR) asymmetry. These events lead to the formation of three distinct regions, the foregut, midgut and hindgut. All the above‑mentioned phenomena are under strict control from various molecular pathways, which are critical for the normal intestinal development and function. Specifically, the intestinal epithelium constitutes a constantly developing tissue, deriving from the progenitor stem cells at the bottom of the intestinal crypt. Epithelial differentiation strongly depends on the crosstalk with the adjacent mesoderm. Major molecular pathways that are implicated in the embryogenesis of the large intestine include the canonical and non‑canonical wingless‑related integration site (Wnt), bone morphogenetic protein (BMP), Notch and hedgehog systems. The aberrant regulation of these pathways inevitably leads to several intestinal malformation syndromes, such as atresia, stenosis, or agangliosis. Novel theories, involving the regulation and homeostasis of intestinal stem cells, suggest an embryological basis for the pathogenesis of colorectal cancer (CRC). Thus, the present review article summarizes the diverse roles of these molecular factors in intestinal embryogenesis and related disorders.
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Affiliation(s)
- Antonios Kostouros
- Laboratory of Anatomy-Histology-Embryology, Medical School, University of Crete, 71110 Heraklion
| | - Ioannis Koliarakis
- Laboratory of Anatomy-Histology-Embryology, Medical School, University of Crete, 71110 Heraklion
| | - Konstantinos Natsis
- Department of Anatomy and Surgical Anatomy, Medical School, Aristotle University of Thessaloniki, 54124 Thessaloniki
| | | | - Aristidis Tsatsakis
- Laboratory of Toxicology, Medical School, University of Crete, 71409 Heraklion, Greece
| | - John Tsiaoussis
- Laboratory of Anatomy-Histology-Embryology, Medical School, University of Crete, 71110 Heraklion
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30
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Yu W, Sun Z, Sweat Y, Sweat M, Venugopalan SR, Eliason S, Cao H, Paine ML, Amendt BA. Pitx2-Sox2-Lef1 interactions specify progenitor oral/dental epithelial cell signaling centers. Development 2020; 147:dev186023. [PMID: 32439755 PMCID: PMC7286298 DOI: 10.1242/dev.186023] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 04/18/2020] [Indexed: 12/14/2022]
Abstract
Epithelial signaling centers control epithelial invagination and organ development, but how these centers are specified remains unclear. We report that Pitx2 (the first transcriptional marker for tooth development) controls the embryonic formation and patterning of epithelial signaling centers during incisor development. We demonstrate using Krt14Cre /Pitx2flox/flox (Pitx2cKO ) and Rosa26CreERT/Pitx2flox/flox mice that loss of Pitx2 delays epithelial invagination, and decreases progenitor cell proliferation and dental epithelium cell differentiation. Developmentally, Pitx2 regulates formation of the Sox2+ labial cervical loop (LaCL) stem cell niche in concert with two signaling centers: the initiation knot and enamel knot. The loss of Pitx2 disrupted the patterning of these two signaling centers, resulting in tooth arrest at E14.5. Mechanistically, Pitx2 transcriptional activity and DNA binding is inhibited by Sox2, and this interaction controls gene expression in specific Sox2 and Pitx2 co-expression progenitor cell domains. We demonstrate new transcriptional mechanisms regulating signaling centers by Pitx2, Sox2, Lef1 and Irx1.
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Affiliation(s)
- Wenjie Yu
- Department of Anatomy and Cell Biology, and the Craniofacial Anomalies Research Center, The University of Iowa, Iowa City, IA 52242, USA
| | - Zhao Sun
- Department of Anatomy and Cell Biology, and the Craniofacial Anomalies Research Center, The University of Iowa, Iowa City, IA 52242, USA
- Division of Nephrology, Washington University School of Medicine, St Louis, MO 63110, USA
| | - Yan Sweat
- Department of Anatomy and Cell Biology, and the Craniofacial Anomalies Research Center, The University of Iowa, Iowa City, IA 52242, USA
| | - Mason Sweat
- Department of Anatomy and Cell Biology, and the Craniofacial Anomalies Research Center, The University of Iowa, Iowa City, IA 52242, USA
| | | | - Steven Eliason
- Department of Anatomy and Cell Biology, and the Craniofacial Anomalies Research Center, The University of Iowa, Iowa City, IA 52242, USA
| | - Huojun Cao
- Iowa Institute for Oral Health Research, College of Dentistry, The University of Iowa, Iowa City, IA 52242, USA
| | - Michael L Paine
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, Los Angeles, CA 90033, USA
| | - Brad A Amendt
- Department of Anatomy and Cell Biology, and the Craniofacial Anomalies Research Center, The University of Iowa, Iowa City, IA 52242, USA
- Iowa Institute for Oral Health Research, College of Dentistry, The University of Iowa, Iowa City, IA 52242, USA
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31
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Petri ND. Evolutionary Diversity of the Mechanisms Providing the Establishment of Left-Right Asymmetry in Metazoans. Russ J Dev Biol 2020. [DOI: 10.1134/s1062360420020058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Guioli S, Zhao D, Nandi S, Clinton M, Lovell-Badge R. Oestrogen in the chick embryo can induce chromosomally male ZZ left gonad epithelial cells to form an ovarian cortex that can support oogenesis. Development 2020; 147:dev181693. [PMID: 32001442 PMCID: PMC7055392 DOI: 10.1242/dev.181693] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 01/16/2020] [Indexed: 12/25/2022]
Abstract
In chickens, the embryonic ovary differentiates into two distinct domains before meiosis: a steroidogenic core (the female medulla), overlain by the germ cell niche (the cortex). The differentiation of the medulla is a cell-autonomous process based on chromosomal sex identity (CASI). In order to address the extent to which cortex differentiation depends on intrinsic or extrinsic factors, we generated models of gonadal intersex by mixing ZW (female) and ZZ (male) cells in gonadal chimeras, or by altering oestrogen levels of ZW and ZZ embryos. We found that CASI does not apply to the embryonic cortex. Both ZW and ZZ cells can form the cortex and this can happen independently of the phenotypic sex of the medulla as long as oestrogen is provided. We also show that the cortex-promoting activity of oestrogen signalling is mediated via estrogen receptor alpha within the left gonad epithelium. However, the presence of a medulla with an 'intersex' or male phenotype may compromise germ cell progression into meiosis, causing cortical germ cells to remain in an immature state in the embryo.
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Affiliation(s)
| | - Debiao Zhao
- The Roslin Institute and R(D)SVS, Gene Function and Development, University of Edinburgh, Edinburgh, EH25 9RG, UK
| | - Sunil Nandi
- The Roslin Institute and R(D)SVS, Gene Function and Development, University of Edinburgh, Edinburgh, EH25 9RG, UK
| | - Michael Clinton
- The Roslin Institute and R(D)SVS, Gene Function and Development, University of Edinburgh, Edinburgh, EH25 9RG, UK
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HAMADA H. Molecular and cellular basis of left-right asymmetry in vertebrates. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2020; 96:273-296. [PMID: 32788551 PMCID: PMC7443379 DOI: 10.2183/pjab.96.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Although the human body appears superficially symmetrical with regard to the left-right (L-R) axis, most visceral organs are asymmetric in terms of their size, shape, or position. Such morphological asymmetries of visceral organs, which are essential for their proper function, are under the control of a genetic pathway that operates in the developing embryo. In many vertebrates including mammals, the breaking of L-R symmetry occurs at a structure known as the L-R organizer (LRO) located at the midline of the developing embryo. This symmetry breaking is followed by transfer of an active form of the signaling molecule Nodal from the LRO to the lateral plate mesoderm (LPM) on the left side, which results in asymmetric expression of Nodal (a left-side determinant) in the left LPM. Finally, L-R asymmetric morphogenesis of visceral organs is induced by Nodal-Pitx2 signaling. This review will describe our current understanding of the mechanisms that underlie the generation of L-R asymmetry in vertebrates, with a focus on mice.
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Affiliation(s)
- Hiroshi HAMADA
- RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
- Correspondence should be addressed: H. Hamada, RIKEN Center for Biosystems Dynamics Research, 2-2-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan (e-mail: )
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34
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Early sarcomere and metabolic defects in a zebrafish pitx2c cardiac arrhythmia model. Proc Natl Acad Sci U S A 2019; 116:24115-24121. [PMID: 31704768 DOI: 10.1073/pnas.1913905116] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Atrial fibrillation (AF) is the most common type of cardiac arrhythmia. The major AF susceptibility locus 4q25 establishes long-range interactions with the promoter of PITX2, a transcription factor gene with critical functions during cardiac development. While many AF-linked loci have been identified in genome-wide association studies, mechanistic understanding into how genetic variants, including those at the 4q25 locus, increase vulnerability to AF is mostly lacking. Here, we show that loss of pitx2c in zebrafish leads to adult cardiac phenotypes with substantial similarities to pathologies observed in AF patients, including arrhythmia, atrial conduction defects, sarcomere disassembly, and altered cardiac metabolism. These phenotypes are also observed in a subset of pitx2c +/- fish, mimicking the situation in humans. Most notably, the onset of these phenotypes occurs at an early developmental stage. Detailed analyses of pitx2c loss- and gain-of-function embryonic hearts reveal changes in sarcomeric and metabolic gene expression and function that precede the onset of cardiac arrhythmia first observed at larval stages. We further find that antioxidant treatment of pitx2c -/- larvae significantly reduces the incidence and severity of cardiac arrhythmia, suggesting that metabolic dysfunction is an important driver of conduction defects. We propose that these early sarcomere and metabolic defects alter cardiac function and contribute to the electrical instability and structural remodeling observed in adult fish. Overall, these data provide insight into the mechanisms underlying the development and pathophysiology of some cardiac arrhythmias and importantly, increase our understanding of how developmental perturbations can predispose to functional defects in the adult heart.
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35
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Alkylglycerol monooxygenase, a heterotaxy candidate gene, regulates left-right patterning via Wnt signaling. Dev Biol 2019; 456:1-7. [PMID: 31398317 DOI: 10.1016/j.ydbio.2019.07.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 07/08/2019] [Accepted: 07/31/2019] [Indexed: 12/30/2022]
Abstract
Congenital heart disease (CHD) is a major cause of morbidity in the pediatric population yet its genetic and molecular causes remain poorly defined. Previously, we identified AGMO as a candidate heterotaxy disease gene, a disorder of left-right (LR) patterning that can have a profound effect on cardiac function. AGMO is the only known alkylglycerol monooxygenase, an orphan tetrahydrobiopterin dependent enzyme that cleaves the ether linkage in alkylglycerols. However, whether AGMO plays a role in LR patterning was unexplored. Here we reveal that Agmo is required for correct development of the embryonic LR axis in Xenopus embryos recapitulating the patient's heterotaxy phenotype. Mechanistically, we demonstrate that Agmo is a regulator of canonical Wnt signaling, required during gastrulation for normal formation of the left - right organizer. Mutational analysis demonstrates that this function is dependent on Agmo's alkylglycerol monooxygenase activity. Together, our findings identify Agmo as a regulator of canonical Wnt signaling, demonstrate a role for Agmo in embryonic axis formation, and provide insight into the poorly understood developmental requirements for ether lipid cleavage.
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Sergi C, Hager T, Hager J. Congenital Segmental Intestinal Dilatation: A 25-Year Review with Long-Term Follow-up at the Medical University of Innsbruck, Austria. AJP Rep 2019; 9:e218-e225. [PMID: 31304051 PMCID: PMC6624109 DOI: 10.1055/s-0039-1693164] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 04/26/2019] [Indexed: 12/24/2022] Open
Abstract
Background and Aim Congenital segmental intestinal dilatation (CSID) is a neonatal condition with unclear etiology and pathogenesis. Typically, the newborn with CSID presents with a limited (circumscribed) bowel dilatation, an abrupt transition between normal and dilated segments, neither intrinsic nor extrinsic perilesional obstruction, and no aganglionosis or neuronal intestinal dysplasia. We aimed to review this disease and the long-term follow-up at the Children's Hospital of the Medical University of Innsbruck, Tyrol, Austria. Study Design Retrospective 25-year review of medical charts, electronic files, and histopathology of neonates with CSID. Results We identified four infants (three girls and one boy) with CSID. The affected areas included duodenum, ileum, ascending colon, and sigmoid colon. Noteworthy, all patients presented with a cardiovascular defect, of which two required multiple cardiac surgical interventions. Three out of the four patients recovered completely. To date, the three infants are alive. Conclusion This is the first report of patients with CSID and cardiovascular defects. The clinical and surgical intervention for CSID also requires a thorough cardiologic evaluation in these patients. CSID remains an enigmatic entity pointing to the need for joint forces in identifying common loci for genetic investigations.
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Affiliation(s)
- Consolato Sergi
- Department of Orthopedics, Tianyou Hospital, Wuhan University of Science and Technology, Wuhan, Hubei, P.R. China.,Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada.,Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Thomas Hager
- Institute of Pathology, University Hospital of Essen, University Duisburg-Essen, Essen, Germany.,Institute of Pathology, Medical University of Innsbruck, Innsbruck, Austria
| | - Josef Hager
- Department of Pediatric Surgery, Medical University of Innsbruck, Innsbruck, Austria
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Hill MC, Kadow ZA, Li L, Tran TT, Wythe JD, Martin JF. A cellular atlas of Pitx2-dependent cardiac development. Development 2019; 146:dev180398. [PMID: 31201182 PMCID: PMC6602352 DOI: 10.1242/dev.180398] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 05/13/2019] [Indexed: 12/12/2022]
Abstract
The Pitx2 gene encodes a homeobox transcription factor that is required for mammalian development. Disruption of PITX2 expression in humans causes congenital heart diseases and is associated with atrial fibrillation; however, the cellular and molecular processes dictated by Pitx2 during cardiac ontogeny remain unclear. To characterize the role of Pitx2 during murine heart development we sequenced over 75,000 single cardiac cell transcriptomes between two key developmental timepoints in control and Pitx2 null embryos. We found that cardiac cell composition was dramatically altered in mutants at both E10.5 and E13.5. Interestingly, the differentiation dynamics of both anterior and posterior second heart field-derived progenitor cells were disrupted in Pitx2 mutants. We also uncovered evidence for defects in left-right asymmetry within atrial cardiomyocyte populations. Furthermore, we were able to detail defects in cardiac outflow tract and valve development associated with Pitx2 Our findings offer insight into Pitx2 function and provide a compilation of gene expression signatures for further detailing the complexities of heart development that will serve as the foundation for future studies of cardiac morphogenesis, congenital heart disease and arrhythmogenesis.
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Affiliation(s)
- Matthew C Hill
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Zachary A Kadow
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Lele Li
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Tien T Tran
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Joshua D Wythe
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX 77030, USA
| | - James F Martin
- Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77030, USA
- Texas Heart Institute, Houston, TX 77030, USA
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX 77030, USA
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Le Fevre A, Baptista J, Ellard S, Overton T, Oliver A, Gradhand E, Scurr I. Compound heterozygous Pkd1l1 variants in a family with two fetuses affected by heterotaxy and complex Chd. Eur J Med Genet 2019; 63:103657. [PMID: 31026592 DOI: 10.1016/j.ejmg.2019.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/25/2019] [Accepted: 04/21/2019] [Indexed: 11/17/2022]
Abstract
Heterotaxy and congenital heart defects associated with pathogenic variants in the PKD1L1 gene (autosomal visceral heterotaxy type 8, MIM 617205) has been reported in only four individuals from three unrelated families. We describe a further family with two affected fetuses and novel compound heterozygous pathogenic variants in PKD1L1. PKD1L1 has been shown to function in the ciliary sensation of nodal flow at the embryo primitive node and in the restriction of NODAL signalling to the left lateral. plate mesoderm, mechanisms involved in the development of laterality in vertebrates. Individuals affected with this autosomal recessive condition have variable thoracic and abdominal situs. Features of CHD and other anomalies vary between and within families.
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Affiliation(s)
- Anna Le Fevre
- Department of Clinical Genetics, University Hospitals Bristol, Bristol, UK
| | - Julia Baptista
- Department of Molecular Genetics, Royal Devon & Exeter NHS Foundation Trust, UK; University of Exeter Medical School, University of Exeter, UK
| | - Sian Ellard
- Department of Molecular Genetics, Royal Devon & Exeter NHS Foundation Trust, UK; University of Exeter Medical School, University of Exeter, UK
| | - Timothy Overton
- Department of Fetal Medicine, St. Michael's Hospital, Bristol, UK
| | - Ann Oliver
- Department of Clinical Genetics, University Hospitals Bristol, Bristol, UK
| | - Elise Gradhand
- Paediatric and Perinatal Pathology, Department of Cellular Pathology, North Bristol NHS Trust, Bristol, UK
| | - Ingrid Scurr
- Department of Clinical Genetics, University Hospitals Bristol, Bristol, UK.
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PITX2 enhances progression of lung adenocarcinoma by transcriptionally regulating WNT3A and activating Wnt/β-catenin signaling pathway. Cancer Cell Int 2019; 19:96. [PMID: 31043858 PMCID: PMC6460850 DOI: 10.1186/s12935-019-0800-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 03/23/2019] [Indexed: 12/28/2022] Open
Abstract
Background The homeodomain transcription factor, PITX2 is associated with tumorigenesis of multiple cancers. In this research, we aimed to study the expression, function and mechanism of PITX2 in lung adenocarcinoma (LUAD). Methods The TCGA dataset was used to analyze the expression and clinical significance of PITX2 in LUAD. The expression of PITX2 in tumor samples and LUAD cell lines was examined by quantitative real-time PCR (qRT-PCR) and western blotting. Small interfering RNAs (siRNAs) were constructed to knockdown PITX2 and to determine the physiological function of PITX2 in vitro. Xenograft model was used to confirm the role of PITX2 in vivo. Results PITX2 was overexpressed in LUAD and patients with high level of PITX2 had a worse overall survival and an advanced clinical stage. Knockdown of PITX2 inhibited cell proliferation, migration and invasion of LUAD cells. Further study revealed that the oncogenic role of PITX2 was dependent on activating Wnt/β-catenin signaling pathway, especially by transcriptionally regulating the Wnt gene family member, WNT3A. Lastly, we identified miR-140-5p as a negative mediator of PITX2 by binding its 3′UTR and ectopic expression of miR-140-5p inhibited progression of LUAD cells via suppressing the expression of PITX2. Conclusions Up-regulation of PITX2 acts as an oncogene in LUAD by activating Wnt/β-catenin signaling pathway, suggesting that PITX2 may serve as a novel diagnostic and prognostic biomarker in LUAD. Electronic supplementary material The online version of this article (10.1186/s12935-019-0800-7) contains supplementary material, which is available to authorized users.
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Nishimura Y, Kasahara K, Shiromizu T, Watanabe M, Inagaki M. Primary Cilia as Signaling Hubs in Health and Disease. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1801138. [PMID: 30643718 PMCID: PMC6325590 DOI: 10.1002/advs.201801138] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 09/20/2018] [Indexed: 05/13/2023]
Abstract
Primary cilia detect extracellular cues and transduce these signals into cells to regulate proliferation, migration, and differentiation. Here, the function of primary cilia as signaling hubs of growth factors and morphogens is in focus. First, the molecular mechanisms regulating the assembly and disassembly of primary cilia are described. Then, the role of primary cilia in mediating growth factor and morphogen signaling to maintain human health and the potential mechanisms by which defects in these pathways contribute to human diseases, such as ciliopathy, obesity, and cancer are described. Furthermore, a novel signaling pathway by which certain growth factors stimulate cell proliferation through suppression of ciliogenesis is also described, suggesting novel therapeutic targets in cancer.
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Affiliation(s)
- Yuhei Nishimura
- Department of Integrative PharmacologyMie University Graduate School of MedicineTsuMie514‐8507Japan
| | - Kousuke Kasahara
- Department of PhysiologyMie University Graduate School of MedicineTsuMie514‐8507Japan
| | - Takashi Shiromizu
- Department of Integrative PharmacologyMie University Graduate School of MedicineTsuMie514‐8507Japan
| | - Masatoshi Watanabe
- Department of Oncologic PathologyMie University Graduate School of MedicineTsuMie514‐8507Japan
| | - Masaki Inagaki
- Department of PhysiologyMie University Graduate School of MedicineTsuMie514‐8507Japan
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41
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Orlova E, Yeh A, Shi M, Firek B, Ranganathan S, Whitcomb DC, Finegold DN, Ferrell RE, Barmada MM, Marazita ML, Hinds DA, Shaffer JR, Morowitz MJ. Genetic association and differential expression of PITX2 with acute appendicitis. Hum Genet 2019; 138:37-47. [PMID: 30392061 PMCID: PMC6514078 DOI: 10.1007/s00439-018-1956-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 10/30/2018] [Indexed: 12/15/2022]
Abstract
Appendicitis affects 9% of Americans and is the most common diagnosis requiring hospitalization of both children and adults. We performed a genome-wide association study of self-reported appendectomy with 18,773 affected adults and 114,907 unaffected adults of European American ancestry. A significant association with appendectomy was observed at 4q25 near the gene PITX2 (rs2129979, p value = 8.82 × 10-14) and was replicated in an independent sample of Caucasians (59 affected, 607 unaffected; p value = 0.005). Meta-analysis of the associated variant across our two cohorts and cohorts from Iceland and the Netherlands (in which this association had previously been reported) showed strong cumulative evidence of association (OR = 1.12; 95% CI 1.09-1.14; p value = 1.81 × 10-23) and some evidence for effect heterogeneity (p value = 0.03). Eight other loci were identified at suggestive significance in the discovery GWAS. Associations were followed up by measuring gene expression across resected appendices with varying levels of inflammation (N = 75). We measured expression of 27 genes based on physical proximity to the GWAS signals, evidence of being targeted by eQTLs near the signals according to RegulomeDB (score = 1), or both. Four of the 27 genes (including PITX2) showed significant evidence (p values < 0.0033) of differential expression across categories of appendix inflammation. An additional ten genes showed nominal evidence (p value < 0.05) of differential expression, which, together with the significant genes, is more than expected by chance (p value = 6.6 × 10-12). PITX2 impacts morphological development of intestinal tissue, promotes an anti-oxidant response, and its expression correlates with levels of intestinal bacteria and colonic inflammation. Further studies of the role of PITX2 in appendicitis are warranted.
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Affiliation(s)
- Ekaterina Orlova
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, 3131 Parran Hall, Pittsburgh, PA, 15261, USA
- Center for Craniofacial and Dental Genetics, University of Pittsburgh, Pittsburgh, PA, 15219, USA
| | - Andrew Yeh
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
| | - Min Shi
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
| | - Brian Firek
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
| | - Sarangarajan Ranganathan
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
| | - David C Whitcomb
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, 3131 Parran Hall, Pittsburgh, PA, 15261, USA
- Department of Division of Gastroenterology, Hepatology and Nutrition, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA
- Department of Cell Biology and Molecular Physiology, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - David N Finegold
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, 3131 Parran Hall, Pittsburgh, PA, 15261, USA
| | - Robert E Ferrell
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, 3131 Parran Hall, Pittsburgh, PA, 15261, USA
| | - M Michael Barmada
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, 3131 Parran Hall, Pittsburgh, PA, 15261, USA
| | - Mary L Marazita
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, 3131 Parran Hall, Pittsburgh, PA, 15261, USA
- Center for Craniofacial and Dental Genetics, University of Pittsburgh, Pittsburgh, PA, 15219, USA
- Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | | | - John R Shaffer
- Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, 130 De Soto Street, 3131 Parran Hall, Pittsburgh, PA, 15261, USA.
- Center for Craniofacial and Dental Genetics, University of Pittsburgh, Pittsburgh, PA, 15219, USA.
- Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
| | - Michael J Morowitz
- Department of Surgery, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15261, USA.
- Faculty Pavilion 7th Floor, Children's Hospital of Pittsburgh of UPMC, 4401 Penn Avenue, Pittsburgh, PA, 15224, USA.
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Lozano-Velasco E, Garcia-Padilla C, Aránega AE, Franco D. Genetics of Atrial Fibrilation: In Search of Novel Therapeutic Targets. Cardiovasc Hematol Disord Drug Targets 2019; 19:183-194. [PMID: 30727926 DOI: 10.2174/1871529x19666190206150349] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 01/16/2019] [Accepted: 01/23/2019] [Indexed: 06/09/2023]
Abstract
Atrial fibrillation (AF) is the most frequent arrhythmogenic disease in humans, ranging from 2% in the general population and rising up to 10-12% in 80+ years. Genetic analyses of AF familiar cases have identified a series of point mutations in distinct ion channels, supporting a causative link. However, these genetic defects only explain a minority of AF patients. Genomewide association studies identified single nucleotide polymorphisms (SNPs), close to PITX2 on 4q25 chromosome, that are highly associated to AF. Subsequent GWAS studies have identified several new loci, involving additional transcription and growth factors. Furthermore, these risk 4q25 SNPs serve as surrogate biomarkers to identify AF recurrence in distinct surgical and pharmacological interventions. Experimental studies have demonstrated an intricate signalling pathway supporting a key role of the homeobox transcription factor PITX2 as a transcriptional regulator. Furthermore, cardiovascular risk factors such as hyperthyroidism, hypertension and redox homeostasis have been identified to modulate PITX2 driven gene regulatory networks. We provide herein a state-of-the-art review of the genetic bases of atrial fibrillation, our current understanding of the genetic regulatory networks involved in AF and its plausible usage for searching novel therapeutic targets.
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Affiliation(s)
- Estefanía Lozano-Velasco
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, Jaen, Spain
| | - Carlos Garcia-Padilla
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, Jaen, Spain
| | - Amelia E Aránega
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, Jaen, Spain
| | - Diego Franco
- Cardiovascular Development Group, Department of Experimental Biology, University of Jaen, Jaen, Spain
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Sempou E, Lakhani OA, Amalraj S, Khokha MK. Candidate Heterotaxy Gene FGFR4 Is Essential for Patterning of the Left-Right Organizer in Xenopus. Front Physiol 2018; 9:1705. [PMID: 30564136 PMCID: PMC6288790 DOI: 10.3389/fphys.2018.01705] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 11/12/2018] [Indexed: 11/13/2022] Open
Abstract
Congenital heart disease (CHD) is the most common birth defect, yet its genetic causes continue to be obscure. Fibroblast growth factor receptor 4 (FGFR4) recently emerged in a large patient exome sequencing study as a candidate disease gene for CHD and specifically heterotaxy. In heterotaxy, patterning of the left-right (LR) body axis is compromised, frequently leading to defects in the heart's LR architecture and severe CHD. FGF ligands like FGF8 and FGF4 have been previously implicated in LR development with roles ranging from formation of the laterality organ [LR organizer (LRO)] to the transfer of asymmetry from the embryonic midline to the lateral plate mesoderm (LPM). However, much less is known about which FGF receptors (FGFRs) play a role in laterality. Here, we show that the candidate heterotaxy gene FGFR4 is essential for proper organ situs in Xenopus and that frogs depleted of fgfr4 display inverted cardiac and gut looping. Fgfr4 knockdown causes mispatterning of the LRO even before cilia on its surface initiate symmetry-breaking fluid flow, indicating a role in the earliest stages of LR development. Specifically, fgfr4 acts during gastrulation to pattern the paraxial mesoderm, which gives rise to the lateral pre-somitic portion of the LRO. Upon fgfr4 knockdown, the paraxial mesoderm is mispatterned in the gastrula and LRO, and crucial genes for symmetry breakage, like coco, xnr1, and gdf3 are subsequently absent from the lateral portions of the organizer. In summary, our data indicate that FGF signaling in mesodermal LRO progenitors defines cell fates essential for subsequent LR patterning.
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Affiliation(s)
- Emily Sempou
- Department of Pediatrics, Yale School of Medicine, Yale University, New Haven, CT, United States
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Desgrange A, Le Garrec JF, Meilhac SM. Left-right asymmetry in heart development and disease: forming the right loop. Development 2018; 145:145/22/dev162776. [PMID: 30467108 DOI: 10.1242/dev.162776] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Extensive studies have shown how bilateral symmetry of the vertebrate embryo is broken during early development, resulting in a molecular left-right bias in the mesoderm. However, how this early asymmetry drives the asymmetric morphogenesis of visceral organs remains poorly understood. The heart provides a striking model of left-right asymmetric morphogenesis, undergoing rightward looping to shape an initially linear heart tube and align cardiac chambers. Importantly, abnormal left-right patterning is associated with severe congenital heart defects, as exemplified in heterotaxy syndrome. Here, we compare the mechanisms underlying the rightward looping of the heart tube in fish, chick and mouse embryos. We propose that heart looping is not only a question of direction, but also one of fine-tuning shape. This is discussed in the context of evolutionary and clinical perspectives.
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Affiliation(s)
- Audrey Desgrange
- Imagine-Institut Pasteur, Laboratory of Heart Morphogenesis, 75015 Paris, France.,INSERM UMR1163, Université Paris Descartes, 75015 Paris, France
| | - Jean-François Le Garrec
- Imagine-Institut Pasteur, Laboratory of Heart Morphogenesis, 75015 Paris, France.,INSERM UMR1163, Université Paris Descartes, 75015 Paris, France
| | - Sigolène M Meilhac
- Imagine-Institut Pasteur, Laboratory of Heart Morphogenesis, 75015 Paris, France .,INSERM UMR1163, Université Paris Descartes, 75015 Paris, France
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Intrinsic cellular chirality regulates left-right symmetry breaking during cardiac looping. Proc Natl Acad Sci U S A 2018; 115:E11568-E11577. [PMID: 30459275 PMCID: PMC6294912 DOI: 10.1073/pnas.1808052115] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Cell chirality, or handedness of the cell, is a newly discovered, fundamental property of the cell, so far studied in cell culture only with micropatterning or graded biomaterial-based approaches. The relevance of intrinsic cell chirality on organ laterality is yet to be established. Cardiac looping is the first organ-specific left–right asymmetry evident during embryogenesis. Despite extensive insights into the molecular signals regulating cardiac left–right asymmetry, the biophysical mechanism is still unknown. Our findings establish intrinsic cell chirality as a regulator of cardiac laterality. This study combines an in vitro chirality assay with embryonic left–right asymmetry in vivo and will significantly impact the understanding and future studies of embryonic left–right asymmetry and congenital heart diseases. The vertebrate body plan is overall symmetrical but left–right (LR) asymmetric in the shape and positioning of internal organs. Although several theories have been proposed, the biophysical mechanisms underlying LR asymmetry are still unclear, especially the role of cell chirality, the LR asymmetry at the cellular level, on organ asymmetry. Here with developing chicken embryos, we examine whether intrinsic cell chirality or handedness regulates cardiac C looping. Using a recently established biomaterial-based 3D culture platform, we demonstrate that chick cardiac cells before and during C looping are intrinsically chiral and exhibit dominant clockwise rotation in vitro. We further show that cells in the developing myocardium are chiral as evident by a rightward bias of cell alignment and a rightward polarization of the Golgi complex, correlating with the direction of cardiac tube rotation. In addition, there is an LR polarized distribution of N-cadherin and myosin II in the myocardium before the onset of cardiac looping. More interestingly, the reversal of cell chirality via activation of the protein kinase C signaling pathway reverses the directionality of cardiac looping, accompanied by a reversal in cellular biases on the cardiac tube. Our results suggest that myocardial cell chirality regulates cellular LR symmetry breaking in the heart tube and the resultant directionality of cardiac looping. Our study provides evidence of an intrinsic cellular chiral bias leading to LR symmetry breaking during directional tissue rotation in vertebrate development.
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Sivakumar A, Mahadevan A, Lauer ME, Narvaez RJ, Ramesh S, Demler CM, Souchet NR, Hascall VC, Midura RJ, Garantziotis S, Frank DB, Kimata K, Kurpios NA. Midgut Laterality Is Driven by Hyaluronan on the Right. Dev Cell 2018; 46:533-551.e5. [PMID: 30174180 DOI: 10.1016/j.devcel.2018.08.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 06/01/2018] [Accepted: 08/01/2018] [Indexed: 11/24/2022]
Abstract
For many years, biologists have focused on the role of Pitx2, expressed on the left side of developing embryos, in governing organ laterality. Here, we identify a different pathway during left-right asymmetry initiated by the right side of the embryo. Surprisingly, this conserved mechanism is orchestrated by the extracellular glycosaminoglycan, hyaluronan (HA) and is independent of Pitx2 on the left. Whereas HA is normally synthesized bilaterally as a simple polysaccharide, we show that covalent modification of HA by the enzyme Tsg6 on the right triggers distinct cell behavior necessary to drive the conserved midgut rotation and to pattern gut vasculature. HA disruption in chicken and Tsg6-/- mice results in failure to initiate midgut rotation and perturbs vascular development predisposing to midgut volvulus. Our study leads us to revise the current symmetry-breaking paradigm in vertebrates and demonstrates how enzymatic modification of HA matrices can execute the blueprint of organ laterality.
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Affiliation(s)
- Aravind Sivakumar
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Aparna Mahadevan
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Mark E Lauer
- Department of Biomedical Engineering, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195, USA
| | - Ricky J Narvaez
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Siddesh Ramesh
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Cora M Demler
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Nathan R Souchet
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA
| | - Vincent C Hascall
- Department of Biomedical Engineering, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195, USA
| | - Ron J Midura
- Department of Biomedical Engineering, Cleveland Clinic Lerner Research Institute, Cleveland, OH 44195, USA
| | - Stavros Garantziotis
- Division of Intramural Research, National Institute of Environmental Health Sciences, Research Triangle Park, Durham, NC, USA
| | - David B Frank
- Division of Pediatric Cardiology, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia, PA 19104, USA
| | - Koji Kimata
- Institute of Molecular Medical Sciences, Aichi Medical University, Nagakute, Aichi, Japan
| | - Natasza A Kurpios
- Department of Molecular Medicine, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
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Abstract
TGF-β family ligands function in inducing and patterning many tissues of the early vertebrate embryonic body plan. Nodal signaling is essential for the specification of mesendodermal tissues and the concurrent cellular movements of gastrulation. Bone morphogenetic protein (BMP) signaling patterns tissues along the dorsal-ventral axis and simultaneously directs the cell movements of convergence and extension. After gastrulation, a second wave of Nodal signaling breaks the symmetry between the left and right sides of the embryo. During these processes, elaborate regulatory feedback between TGF-β ligands and their antagonists direct the proper specification and patterning of embryonic tissues. In this review, we summarize the current knowledge of the function and regulation of TGF-β family signaling in these processes. Although we cover principles that are involved in the development of all vertebrate embryos, we focus specifically on three popular model organisms: the mouse Mus musculus, the African clawed frog of the genus Xenopus, and the zebrafish Danio rerio, highlighting the similarities and differences between these species.
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Affiliation(s)
- Joseph Zinski
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania 19104-6058
| | - Benjamin Tajer
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania 19104-6058
| | - Mary C Mullins
- University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania 19104-6058
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48
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Barichello S, Roberts JD, Backx P, Boyle PM, Laksman Z. Personalizing therapy for atrial fibrillation: the role of stem cell and in silico disease models. Cardiovasc Res 2018; 114:931-943. [DOI: 10.1093/cvr/cvy090] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Accepted: 04/06/2018] [Indexed: 11/12/2022] Open
Affiliation(s)
- Scott Barichello
- University of British Columbia, 2329 West Mall, Vancouver, BC V6T 1Z4, Canada
| | - Jason D Roberts
- Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, Western University, London, ON, Canada
| | | | - Patrick M Boyle
- Department of Biomedical Engineering and Institute for Computational Medicine, Johns Hopkins University
| | - Zachary Laksman
- Division of Cardiology, University of British Columbia, 211-1033 Davie Street Vancouver, BC V6E 1M7, Canada
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49
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Soukup V, Mrstakova S, Kozmik Z. Asymmetric pitx2 expression in medaka epithalamus is regulated by nodal signaling through an intronic enhancer. Dev Genes Evol 2018; 228:131-139. [PMID: 29663064 DOI: 10.1007/s00427-018-0611-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/03/2018] [Indexed: 12/23/2022]
Abstract
The epithalamic region of fishes shows prominent left-right asymmetries that are executed by nodal signaling upstream of the asymmetry-determining transcription factor pitx2. Previous reports have identified that nodal controls the left-sided pitx2 expression in the lateral plate mesoderm through an enhancer present in the last intron of this gene. However, whether similar regulation occurs also in the case of epithalamic asymmetry is currently unresolved. Here, we address some of the cis-regulatory information that control asymmetric pitx2 expression in epithalamus by presenting a Tg(pitx2:EGFP) 116-17 transgenic medaka model, which expresses enhanced green fluorescent protein (EGFP) under control of an intronic enhancer. We show that this transgene recapitulates epithalamic expression of the endogenous pitx2 and that it responds to nodal signaling inhibition. Further, we identify that three foxh1-binding sites present in this enhancer modulate expression of the transgene and that the second site is absolutely necessary for the left-sided epithalamic expression while the other two sites may have subtler regulative roles. We provide evidence that left-sided epithalamic pitx2 expression is controlled through an enhancer present in the last intron of this gene and that the regulatory logic underlying asymmetric pitx2 expression is shared between epithalamic and lateral plate mesoderm regions.
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Affiliation(s)
- Vladimir Soukup
- Institute of Molecular Genetics of the Czech Academy of Sciences, Videnska 1083, 142 20, Prague, Czech Republic.
- Department of Zoology, Faculty of Science, Charles University in Prague, Vinicna 7, 128 44, Prague, Czech Republic.
| | - Simona Mrstakova
- Institute of Molecular Genetics of the Czech Academy of Sciences, Videnska 1083, 142 20, Prague, Czech Republic
| | - Zbynek Kozmik
- Institute of Molecular Genetics of the Czech Academy of Sciences, Videnska 1083, 142 20, Prague, Czech Republic
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50
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Griffin JN, del Viso F, Duncan AR, Robson A, Hwang W, Kulkarni S, Liu KJ, Khokha MK. RAPGEF5 Regulates Nuclear Translocation of β-Catenin. Dev Cell 2018; 44:248-260.e4. [PMID: 29290587 PMCID: PMC5818985 DOI: 10.1016/j.devcel.2017.12.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 09/04/2017] [Accepted: 11/30/2017] [Indexed: 12/16/2022]
Abstract
Canonical Wnt signaling coordinates many critical aspects of embryonic development, while dysregulated Wnt signaling contributes to common diseases, including congenital malformations and cancer. The nuclear localization of β-catenin is the defining step in pathway activation. However, despite intensive investigation, the mechanisms regulating β-catenin nuclear transport remain undefined. In a patient with congenital heart disease and heterotaxy, a disorder of left-right patterning, we previously identified the guanine nucleotide exchange factor, RAPGEF5. Here, we demonstrate that RAPGEF5 regulates left-right patterning via Wnt signaling. In particular, RAPGEF5 regulates the nuclear translocation of β-catenin independently of both β-catenin cytoplasmic stabilization and the importin β1/Ran-mediated transport system. We propose a model whereby RAPGEF5 activates the nuclear GTPases, Rap1a/b, to facilitate the nuclear transport of β-catenin, defining a parallel nuclear transport pathway to Ran. Our results suggest new targets for modulating Wnt signaling in disease states.
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Affiliation(s)
- John N. Griffin
- Pediatric Genomics Discovery Program, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA,Centre for Craniofacial and Regenerative Biology, King’s College London, London SE1 9RT, United Kingdom
| | - Florencia del Viso
- Pediatric Genomics Discovery Program, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA
| | - Anna R. Duncan
- Pediatric Genomics Discovery Program, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA
| | - Andrew Robson
- Pediatric Genomics Discovery Program, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA
| | - Woong Hwang
- Pediatric Genomics Discovery Program, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA
| | - Saurabh Kulkarni
- Pediatric Genomics Discovery Program, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA
| | - Karen J. Liu
- Centre for Craniofacial and Regenerative Biology, King’s College London, London SE1 9RT, United Kingdom
| | - Mustafa K. Khokha
- Pediatric Genomics Discovery Program, Departments of Pediatrics and Genetics, Yale University School of Medicine, 333 Cedar Street, New Haven, Connecticut 06510, USA,Correspondence to: Lead contact Mustafa Khokha,
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