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Westerberg AC, Degnes MHL, Andresen IJ, Roland MCP, Michelsen TM. Angiogenic and vasoactive proteins in the maternal-fetal interface in healthy pregnancies and preeclampsia. Am J Obstet Gynecol 2024:S0002-9378(24)00441-1. [PMID: 38494070 DOI: 10.1016/j.ajog.2024.03.012] [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: 12/05/2023] [Revised: 03/08/2024] [Accepted: 03/08/2024] [Indexed: 03/19/2024]
Abstract
BACKGROUND Preeclampsia is characterized by maternal endothelial activation and placental dysfunction. Imbalance in maternal angiogenic and vasoactive factors has been linked to the pathophysiology. The contribution of the placenta as a source of these factors remains unclear. Furthermore, little is known about fetal angiogenic and vasoactive proteins and the relation between maternal and fetal levels. OBJECTIVE We describe placental growth factor, soluble Fms-like tyrosine kinase 1, soluble endoglin, and endothelin 1-3 in 5 vessels in healthy pregnancies, early- and late-onset preeclampsia. Specifically, we aimed to (1) compare protein abundance in vessels at the maternal-fetal interface between early- and late-onset preeclampsia, and healthy pregnancies, (2) describe placental uptake and release of proteins, and (3) describe protein abundance in the maternal vs fetal circulations. STUDY DESIGN Samples were collected from the maternal radial artery, uterine vein and antecubital vein, and fetal umbilical vein and artery in 75 healthy and 37 preeclamptic mother-fetus pairs (including 19 early-onset preeclampsia and 18 late-onset preeclampsia), during scheduled cesarean delivery. This method allows estimation of placental release and uptake of proteins by calculation of venoarterial differences on each side of the placenta. The microarray-based SomaScan assay quantified the proteins. RESULTS The abundance of soluble Fms-like tyrosine kinase 1 and endothelin 1 was higher in the maternal vessels in preeclampsia than in healthy pregnancies, with the highest abundance in early-onset preeclampsia. Placental growth factor was lower in the maternal vessels in early-onset preeclampsia than in both healthy and late-onset preeclampsia. Maternal endothelin 2 was higher in preeclampsia, with late-onset preeclampsia having the highest abundance. Our model confirmed placental release of placental growth factor and soluble Fms-like tyrosine kinase 1 to the maternal circulation in all groups. The placenta released soluble Fms-like tyrosine kinase 1 into the fetal circulation in healthy and late-onset preeclampsia pregnancies. Fetal endothelin 1 and soluble Fms-like tyrosine kinase 1 were higher in early-onset preeclampsia, whereas soluble endoglin and endothelin 3 were lower in both preeclampsia groups than healthy controls. Across groups, abundances of placental growth factor, soluble Fms-like tyrosine kinase 1, and endothelin 3 were higher in the maternal artery than the fetal umbilical vein, whereas endothelin 2 was lower. CONCLUSION An increasing abundance of maternal soluble Fms-like tyrosine kinase 1 and endothelin 1 across the groups healthy, late-onset preeclampsia and early-onset combined with a positive correlation may suggest that these proteins are associated with the pathophysiology and severity of the disease. Elevated endothelin 1 in the fetal circulation in early-onset preeclampsia represents a novel finding. The long-term effects of altered protein abundance in preeclampsia on fetal development and health remain unknown. Further investigation of these proteins' involvement in the pathophysiology and as treatment targets is warranted.
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Affiliation(s)
- Ane Cecilie Westerberg
- Division of Obstetrics and Gynecology, Department of Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway; School of Health Sciences, Kristiania University College, Oslo, Norway.
| | - Maren-Helene Langeland Degnes
- Division of Obstetrics and Gynecology, Department of Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway; Department of Biostatistics, Oslo Centre for Biostatistics and Epidemiology, University of Oslo, Oslo, Norway
| | - Ina Jungersen Andresen
- Division of Obstetrics and Gynecology, Department of Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Marie Cecilie Paasche Roland
- Division of Obstetrics and Gynecology, Department of Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Trond Melbye Michelsen
- Division of Obstetrics and Gynecology, Department of Obstetrics, Oslo University Hospital Rikshospitalet, Oslo, Norway; Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
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2
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Han K, He Z, Liu Y, Chen H. Identification of EDNRA as the Key Biomarker for Hypercholesterolemia and Colorectal Cancer. TOHOKU J EXP MED 2024; 262:181-189. [PMID: 38123303 DOI: 10.1620/tjem.2023.j101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Some studies have investigated the role of cholesterol in the progression of colorectal cancer (CRC). However, the underlying mechanism of action is not clear. In this study, we used bioinformatics tools to elucidate the molecular mechanisms involved. We initially obtained CRC datasets from the Gene Expression Omnibus (GEO) database and hypercholesterolemia data from GeneCards and DisGeNE. Common differentially expressed genes (DEGs) were determined by using Venn diagram web tools. Next, we performed Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses using the Database for Annotation, Visualization, and Integrated Discovery (DAVID). The hub gene was identified through common expression pattern analysis and survival analysis. Finally, we conducted an immune regulatory point analysis and predicted target drugs based on the hub gene. The results of our analysis revealed 13 common DEGs, with endothelin receptor type A (EDNRA) identified as the hub gene linking hypercholesterolemia and CRC. The results of the GO analysis showed that the common DEGs were primarily associated with the G-protein coupled receptor signaling pathway, extracellular space, and receptor binding. The results of the KEGG pathway enrichment analysis indicated enrichment in pathways related to cancer and the phospholipase D signaling pathway. Additionally, we identified potential target drugs, including Podocarpus montanus, Diospyros kaki, Herba Salviae japoniae, sitaxentan, and ambrisentan. We found that EDNRA might be an underlying biomarker for both hypercholesterolemia and CRC. The predicted target drugs provide new strategies for treating CRC.
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Affiliation(s)
- Kedong Han
- Department of Cardiology, Maoming People's Hospital
| | - Zhijiang He
- Department of Oncology, Maoming People's Hospital
| | - Yunjun Liu
- Department of Oncology, Maoming People's Hospital
| | - Hua Chen
- Department of Oncology, Maoming People's Hospital
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3
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Dershowitz LB, Kaltschmidt JA. Enteric Nervous System Striped Patterning and Disease: Unexplored Pathophysiology. Cell Mol Gastroenterol Hepatol 2024:S2352-345X(24)00056-0. [PMID: 38479486 DOI: 10.1016/j.jcmgh.2024.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 03/08/2024] [Accepted: 03/08/2024] [Indexed: 04/04/2024]
Abstract
The enteric nervous system (ENS) controls gastrointestinal (GI) motility, and defects in ENS development underlie pediatric GI motility disorders. In disorders such as Hirschsprung's disease (HSCR), pediatric intestinal pseudo-obstruction (PIPO), and intestinal neuronal dysplasia type B (INDB), ENS structure is altered with noted decreased neuronal density in HSCR and reports of increased neuronal density in PIPO and INDB. The developmental origin of these structural deficits is not fully understood. Here, we review the current understanding of ENS development and pediatric GI motility disorders incorporating new data on ENS structure. In particular, emerging evidence demonstrates that enteric neurons are patterned into circumferential stripes along the longitudinal axis of the intestine during mouse and human development. This novel understanding of ENS structure proposes new questions about the pathophysiology of pediatric GI motility disorders. If the ENS is organized into stripes, could the observed changes in enteric neuron density in HSCR, PIPO, and INDB represent differences in the distribution of enteric neuronal stripes? Here, we review mechanisms of striped patterning from other biological systems and propose how defects in striped ENS patterning could explain structural deficits observed in pediatric GI motility disorders.
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Affiliation(s)
- Lori B Dershowitz
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California; Wu Tsai Neurosciences Institute, Stanford University, Stanford, California
| | - Julia A Kaltschmidt
- Department of Neurosurgery, Stanford University School of Medicine, Stanford, California; Wu Tsai Neurosciences Institute, Stanford University, Stanford, California.
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4
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Hamley M, Leyk S, Casar C, Liebold I, Jawazneh AA, Lanzloth C, Böttcher M, Haas H, Richardt U, Rothlin CV, Jacobs T, Huber S, Adlung L, Pelczar P, Henao-Mejia J, Bosurgi L. Nmes1 is a novel regulator of mucosal response influencing intestinal healing potential. Eur J Immunol 2024; 54:e2350434. [PMID: 37971166 DOI: 10.1002/eji.202350434] [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: 02/15/2023] [Revised: 11/14/2023] [Accepted: 11/15/2023] [Indexed: 11/19/2023]
Abstract
The initiation of tissue remodeling following damage is a critical step in preventing the development of immune-mediated diseases. Several factors contribute to mucosal healing, leading to innovative therapeutic approaches for managing intestinal disorders. However, uncovering alternative targets and gaining mechanistic insights are imperative to enhance therapy efficacy and broaden its applicability across different intestinal diseases. Here we demonstrate that Nmes1, encoding for Normal Mucosa of Esophagus-Specific gene 1, also known as Aa467197, is a novel regulator of mucosal healing. Nmes1 influences the macrophage response to the tissue remodeling cytokine IL-4 in vitro. In addition, using two murine models of intestinal damage, each characterized by a type 2-dominated environment with contrasting functions, the ablation of Nmes1 results in decreased intestinal regeneration during the recovery phase of colitis, while enhancing parasitic egg clearance and reducing fibrosis during the advanced stages of Schistosoma mansoni infection. These outcomes are associated with alterations in CX3CR1+ macrophages, cells known for their wound-healing potential in the inflamed colon, hence promising candidates for cell therapies. All in all, our data indicate Nmes1 as a novel contributor to mucosal healing, setting the basis for further investigation into its potential as a new target for the treatment of colon-associated inflammation.
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Affiliation(s)
- Madeleine Hamley
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Stephanie Leyk
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Christian Casar
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Bioinformatics Core, University Medical Centre Hamburg-Eppendorf, Hamburg, Germany
| | - Imke Liebold
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Amirah Al Jawazneh
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Clarissa Lanzloth
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Marius Böttcher
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Ulricke Richardt
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Carla V Rothlin
- Department of Immunobiology, Yale University School of Medicine, New Haven, Connecticut, USA
- Department of Pharmacology, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Thomas Jacobs
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Samuel Huber
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Translational Immunology (HCTI), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lorenz Adlung
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Hamburg Center for Translational Immunology (HCTI), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Center for Biomedical AI, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Penelope Pelczar
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Jorge Henao-Mejia
- The Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Lidia Bosurgi
- I. Department of Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Protozoa Immunology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- Hamburg Center for Translational Immunology (HCTI), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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5
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Kanai SM, Clouthier DE. Endothelin signaling in development. Development 2023; 150:dev201786. [PMID: 38078652 PMCID: PMC10753589 DOI: 10.1242/dev.201786] [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] [Indexed: 12/18/2023]
Abstract
Since the discovery of endothelin 1 (EDN1) in 1988, the role of endothelin ligands and their receptors in the regulation of blood pressure in normal and disease states has been extensively studied. However, endothelin signaling also plays crucial roles in the development of neural crest cell-derived tissues. Mechanisms of endothelin action during neural crest cell maturation have been deciphered using a variety of in vivo and in vitro approaches, with these studies elucidating the basis of human syndromes involving developmental differences resulting from altered endothelin signaling. In this Review, we describe the endothelin pathway and its functions during the development of neural crest-derived tissues. We also summarize how dysregulated endothelin signaling causes developmental differences and how this knowledge may lead to potential treatments for individuals with gene variants in the endothelin pathway.
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Affiliation(s)
- Stanley M. Kanai
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - David E. Clouthier
- Department of Craniofacial Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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6
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Kovács T, Halasy V, Pethő C, Szőcs E, Soós Á, Dóra D, de Santa Barbara P, Faure S, Stavely R, Goldstein AM, Nagy N. Essential Role of BMP4 Signaling in the Avian Ceca in Colorectal Enteric Nervous System Development. Int J Mol Sci 2023; 24:15664. [PMID: 37958648 PMCID: PMC10650322 DOI: 10.3390/ijms242115664] [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: 08/31/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
The enteric nervous system (ENS) is principally derived from vagal neural crest cells that migrate caudally along the entire length of the gastrointestinal tract, giving rise to neurons and glial cells in two ganglionated plexuses. Incomplete migration of enteric neural crest-derived cells (ENCDC) leads to Hirschsprung disease, a congenital disorder characterized by the absence of enteric ganglia along variable lengths of the colorectum. Our previous work strongly supported the essential role of the avian ceca, present at the junction of the midgut and hindgut, in hindgut ENS development, since ablation of the cecal buds led to incomplete ENCDC colonization of the hindgut. In situ hybridization shows bone morphogenetic protein-4 (BMP4) is highly expressed in the cecal mesenchyme, leading us to hypothesize that cecal BMP4 is required for hindgut ENS development. To test this, we modulated BMP4 activity using embryonic intestinal organ culture techniques and retroviral infection. We show that overexpression or inhibition of BMP4 in the ceca disrupts hindgut ENS development, with GDNF playing an important regulatory role. Our results suggest that these two important signaling pathways are required for normal ENCDC migration and enteric ganglion formation in the developing hindgut ENS.
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Affiliation(s)
- Tamás Kovács
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (T.K.); (E.S.); (Á.S.); (D.D.)
| | - Viktória Halasy
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (T.K.); (E.S.); (Á.S.); (D.D.)
| | - Csongor Pethő
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (T.K.); (E.S.); (Á.S.); (D.D.)
| | - Emőke Szőcs
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (T.K.); (E.S.); (Á.S.); (D.D.)
| | - Ádám Soós
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (T.K.); (E.S.); (Á.S.); (D.D.)
| | - Dávid Dóra
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (T.K.); (E.S.); (Á.S.); (D.D.)
| | - Pascal de Santa Barbara
- PhyMedExp, University of Montpellier, INSERM, CNRS, 34295 Montpellier, France; (P.d.S.B.); (S.F.)
| | - Sandrine Faure
- PhyMedExp, University of Montpellier, INSERM, CNRS, 34295 Montpellier, France; (P.d.S.B.); (S.F.)
| | - Rhian Stavely
- Pediatric Surgery Research Laboratories, Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; (R.S.); (A.M.G.)
| | - Allan M. Goldstein
- Pediatric Surgery Research Laboratories, Department of Pediatric Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; (R.S.); (A.M.G.)
| | - Nándor Nagy
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, Semmelweis University, 1094 Budapest, Hungary; (T.K.); (E.S.); (Á.S.); (D.D.)
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7
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Montalva L, Cheng LS, Kapur R, Langer JC, Berrebi D, Kyrklund K, Pakarinen M, de Blaauw I, Bonnard A, Gosain A. Hirschsprung disease. Nat Rev Dis Primers 2023; 9:54. [PMID: 37828049 DOI: 10.1038/s41572-023-00465-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/12/2023] [Indexed: 10/14/2023]
Abstract
Hirschsprung disease (HSCR) is a rare congenital intestinal disease that occurs in 1 in 5,000 live births. HSCR is characterized by the absence of ganglion cells in the myenteric and submucosal plexuses of the intestine. Most patients present during the neonatal period with the first meconium passage delayed beyond 24 h, abdominal distension and vomiting. Syndromes associated with HSCR include trisomy 21, Mowat-Wilson syndrome, congenital central hypoventilation syndrome, Shah-Waardenburg syndrome and cartilage-hair hypoplasia. Multiple putative genes are involved in familial and isolated HSCR, of which the most common are the RET proto-oncogene and EDNRB. Diagnosis consists of visualization of a transition zone on contrast enema and confirmation via rectal biopsy. HSCR is typically managed by surgical removal of the aganglionic bowel and reconstruction of the intestinal tract by connecting the normally innervated bowel down to the anus while preserving normal sphincter function. Several procedures, namely Swenson, Soave and Duhamel procedures, can be undertaken and may include a laparoscopically assisted approach. Short-term and long-term comorbidities include persistent obstructive symptoms, enterocolitis and soiling. Continued research and innovation to better understand disease mechanisms holds promise for developing novel techniques for diagnosis and therapy, and improving outcomes in patients.
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Affiliation(s)
- Louise Montalva
- Department of Paediatric Surgery, Robert-Debré Children's University Hospital, Paris, France.
- Faculty of Health, Paris-Cité University, Paris, France.
- NeuroDiderot, INSERM UMR1141, Paris, France.
| | - Lily S Cheng
- Division of Paediatric Surgery, Texas Children's Hospital, Houston, TX, USA
- Division of Paediatric Surgery, University of Virginia, Charlottesville, VA, USA
| | - Raj Kapur
- Department of Pathology, Seattle Children's Hospital, Seattle, WA, USA
| | - Jacob C Langer
- Division of Paediatric Surgery, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Dominique Berrebi
- Department of Pathology, Robert-Debré and Necker Children's University Hospital, Paris, France
| | - Kristiina Kyrklund
- Department of Paediatric Surgery, Helsinki University Central Hospital, Helsinki, Finland
| | - Mikko Pakarinen
- Department of Paediatric Surgery, Helsinki University Central Hospital, Helsinki, Finland
| | - Ivo de Blaauw
- Department of Surgery, Division of Paediatric Surgery, Radboudumc-Amalia Children's Hospital, Nijmegen, Netherlands
| | - Arnaud Bonnard
- Department of Paediatric Surgery, Robert-Debré Children's University Hospital, Paris, France
- Faculty of Health, Paris-Cité University, Paris, France
- NeuroDiderot, INSERM UMR1141, Paris, France
| | - Ankush Gosain
- Department of Paediatric Surgery, Children's Hospital Colorado, Aurora, CO, USA.
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8
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Vasamsetti BMK, Chon K, Yoon CY, Kim J, Choi JY, Hwang S, Park KH. Transcriptome Profiling of Etridiazole-Exposed Zebrafish ( Danio rerio) Embryos Reveals Pathways Associated with Cardiac and Ocular Toxicities. Int J Mol Sci 2023; 24:15067. [PMID: 37894748 PMCID: PMC10606920 DOI: 10.3390/ijms242015067] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 10/04/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Etridiazole (EDZ) is a thiadiazole-containing fungicide commonly used to control Pythium and Phytophthora spp. Although previous studies have shown that EDZ is teratogenic, the exact molecular mechanisms underlying its toxicity remain unknown. In this study, a zebrafish (Danio rerio; ZF) model was used to explore the molecular pathways associated with EDZ toxicity. The whole transcriptome of ZF embryos exposed to 96 h of EDZ was analyzed, along with developmental abnormalities. EDZ-induced malformations were primarily related to the eyes, heart, and growth of the ZF. Compared to untreated ZF, etridiazole-treated ZF had 2882 differentially expressed genes (DEGs), consisting of 1651 downregulated genes and 1231 upregulated genes. Gene ontology enrichment analysis showed that DEGs were involved in biological processes, such as sensory perception, visual perception, sensory organ development, and visual system development, and showed transmembrane transporter and peptidase regulator activities. Metabolism, phototransduction, aminoacyl-tRNA biosynthesis, MAPK signaling pathway, calcium signaling pathway, and vascular smooth muscle contraction were among the most enriched KEGG pathways. The qPCR analyses of the eight random genes were in good agreement with the transcriptome data. These results suggest several putative mechanisms underlying EDZ-induced developmental deformities in ZF.
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Affiliation(s)
| | - Kyongmi Chon
- Toxicity and Risk Assessment Division, Department of Agro-Food Safety and Crop Protection, National Institute of Agricultural Sciences, Rural Development Administration, Iseo-myeon, Wanju-gun 55365, Jeollabuk-do, Republic of Korea; (B.M.K.V.); (S.H.); (K.-H.P.)
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9
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Alqarni AA, Aldhahir AM, Alghamdi SA, Alqahtani JS, Siraj RA, Alwafi H, AlGarni AA, Majrshi MS, Alshehri SM, Pang L. Role of prostanoids, nitric oxide and endothelin pathways in pulmonary hypertension due to COPD. Front Med (Lausanne) 2023; 10:1275684. [PMID: 37881627 PMCID: PMC10597708 DOI: 10.3389/fmed.2023.1275684] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 09/19/2023] [Indexed: 10/27/2023] Open
Abstract
Pulmonary hypertension (PH) due to chronic obstructive pulmonary disease (COPD) is classified as Group 3 PH, with no current proven targeted therapies. Studies suggest that cigarette smoke, the most risk factor for COPD can cause vascular remodelling and eventually PH as a result of dysfunction and proliferation of pulmonary artery smooth muscle cells (PASMCs) and pulmonary artery endothelial cells (PAECs). In addition, hypoxia is a known driver of pulmonary vascular remodelling in COPD, and it is also thought that the presence of hypoxia in patients with COPD may further exaggerate cigarette smoke-induced vascular remodelling; however, the underlying cause is not fully understood. Three main pathways (prostanoids, nitric oxide and endothelin) are currently used as a therapeutic target for the treatment of patients with different groups of PH. However, drugs targeting these three pathways are not approved for patients with COPD-associated PH due to lack of evidence. Thus, this review aims to shed light on the role of impaired prostanoids, nitric oxide and endothelin pathways in cigarette smoke- and hypoxia-induced pulmonary vascular remodelling and also discusses the potential of using these pathways as therapeutic target for patients with PH secondary to COPD.
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Affiliation(s)
- Abdullah A. Alqarni
- Department of Respiratory Therapy, Faculty of Medical Rehabilitation Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Respiratory Therapy Unit, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
| | - Abdulelah M. Aldhahir
- Respiratory Therapy Department, Faculty of Applied Medical Sciences, Jazan University, Jazan, Saudi Arabia
| | - Sara A. Alghamdi
- Respiratory Care Department, Al Murjan Hospital, Jeddah, Saudi Arabia
| | - Jaber S. Alqahtani
- Department of Respiratory Care, Prince Sultan Military College of Health Sciences, Dammam, Saudi Arabia
| | - Rayan A. Siraj
- Department of Respiratory Care, College of Applied Medical Sciences, King Faisal University, Al Ahsa, Saudi Arabia
| | - Hassan Alwafi
- Faculty of Medicine, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Abdulkareem A. AlGarni
- King Abdulaziz Hospital, The Ministry of National Guard Health Affairs, Al Ahsa, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, College of Applied Medical Sciences, Al Ahsa, Saudi Arabia
| | - Mansour S. Majrshi
- National Heart and Lung Institute, Imperial College London, London, United Kingdom
- Respiratory Medicine, Royal Brompton Hospital, London, United Kingdom
| | - Saad M. Alshehri
- Department of Respiratory Therapy, King Fahad General Hospital, Jeddah, Saudi Arabia
| | - Linhua Pang
- Respiratory Medicine Research Group, Academic Unit for Translational Medical Sciences, University of Nottingham School of Medicine, Nottingham, United Kingdom
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10
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Wang J, Zhi Z, Ding J, Jia N, Hu Y, Cai J, Li H, Tang J, Tang W, Mao X. Suppression of PGE2/EP2 signaling alleviates Hirschsprung disease by upregulating p38 mitogen-activated protein kinase activity. J Mol Med (Berl) 2023; 101:1125-1139. [PMID: 37522903 DOI: 10.1007/s00109-023-02353-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/11/2023] [Accepted: 07/19/2023] [Indexed: 08/01/2023]
Abstract
Hirschsprung disease (HSCR) is a congenital disorder caused by the failure of enteric neural crest cells (ENCCs) to colonize the distal bowel, resulting in absence of enteric nervous system. While a range of molecules and signaling pathways have been found to contribute to HSCR development, the risk factors and pathogenesis of this disease in many patients remain unknown. We previously demonstrated that increased activity of the prostaglandin E2 (PGE2)/PGE2 receptor subtype EP2 pathway can be a risk factor for HSCR. In this study, an Ednrb-deficient mouse model of HSCR was generated and used to investigate if PGE2/EP2 pathway could be a potential therapeutic target for HSCR. We found that downregulation of PGE2/EP2 signaling by siRNA-mediated ablation of a PGE2 synthase or pharmacologic blockage of EP2 enhanced ENCC colonization in the distal bowel of Ednrb-/- mice and alleviated their HSCR-like symptoms. Furthermore, blockage of EP2 was shown to promote ENCC migration through upregulating p38 mitogen-activated protein kinase activity, which was downregulated in the colon of Ednrb-/- mice and in the distal aganglionic bowel of HSCR patients. These data provide evidence that maternal exposure during embryonic development to an environment with dysregulated activation of the PGE2/EP2 pathway may predispose genetically susceptible offspring to HSCR, and avoidance or early disruption of maternal events (e.g. inflammation) that possibly enhance PGE2/EP2 signaling during pregnancy would reduce the occurrence and severity of this disease. KEY MESSAGES : Knockdown of PTGES alleviates HSCR severity in Ednrb-/- mice. Blockage of EP2-mediated PGE2 signaling alleviates HSCR severity in Ednrb-/- mice. Blockage of EP2-mediated PGE2 signaling promotes ENCC migration via enhancing p38 activity.
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Affiliation(s)
- Jiao Wang
- School of Life Science and Technology, Key Laboratory of Ministry of Education for Developmental Genes and Human Disease, Southeast University, Nanjing, Jiangsu, 210096, China
| | - Zhengke Zhi
- Department of Pediatric Surgery, Childrens Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China
| | - Jie Ding
- Department of Biochemistry and Molecular Biology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Na Jia
- School of Life Science and Technology, Key Laboratory of Ministry of Education for Developmental Genes and Human Disease, Southeast University, Nanjing, Jiangsu, 210096, China
| | - Yuqing Hu
- Department of Biochemistry and Molecular Biology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Jiali Cai
- School of Life Science and Technology, Key Laboratory of Ministry of Education for Developmental Genes and Human Disease, Southeast University, Nanjing, Jiangsu, 210096, China
| | - Hongxing Li
- Department of Pediatric Surgery, Childrens Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China
| | - Jie Tang
- Department of Pediatric Surgery, Childrens Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China
| | - Weibing Tang
- Department of Pediatric Surgery, Childrens Hospital of Nanjing Medical University, Nanjing, Jiangsu, 210008, China.
| | - Xiaohua Mao
- School of Life Science and Technology, Key Laboratory of Ministry of Education for Developmental Genes and Human Disease, Southeast University, Nanjing, Jiangsu, 210096, China.
- Department of Biochemistry and Molecular Biology, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
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11
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Dao UM, Lederer I, Tabor RL, Shahid B, Graves CW, Seidel HS. Stripes and loss of color in ball pythons (Python regius) are associated with variants affecting endothelin signaling. G3 (BETHESDA, MD.) 2023; 13:jkad063. [PMID: 37191439 PMCID: PMC10320763 DOI: 10.1093/g3journal/jkad063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 03/10/2023] [Indexed: 05/17/2023]
Abstract
Color patterns in nonavian reptiles are beautifully diverse, but little is known about the genetics and development of these patterns. Here, we investigated color patterning in pet ball pythons (Python regius), which have been bred to show color phenotypes that differ dramatically from the wildtype form. We report that several color phenotypes in pet animals are associated with putative loss-of-function variants in the gene encoding endothelin receptor EDNRB1: (1) frameshift variants in EDNRB1 are associated with conversion of the normal mottled color pattern to skin that is almost fully white, (2) missense variants affecting conserved sites of the EDNRB1 protein are associated with dorsal, longitudinal stripes, and (3) substitutions at EDNRB1 splice donors are associated with subtle changes in patterning compared to wildtype. We propose that these phenotypes are caused by loss of specialized color cells (chromatophores), with loss ranging from severe (fully white) to moderate (dorsal striping) to mild (subtle changes in patterning). Our study is the first to describe variants affecting endothelin signaling in a nonavian reptile and suggests that reductions in endothelin signaling in ball pythons can produce a variety of color phenotypes, depending on the degree of color cell loss.
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Affiliation(s)
- Uyen M Dao
- Department of Biology, Eastern Michigan University, Ypsilanti, MI 48197, USA
| | - Izabella Lederer
- Department of Biology, Eastern Michigan University, Ypsilanti, MI 48197, USA
| | - Ray L Tabor
- Department of Biology, Eastern Michigan University, Ypsilanti, MI 48197, USA
| | - Basmah Shahid
- Department of Biology, Eastern Michigan University, Ypsilanti, MI 48197, USA
| | - Chiron W Graves
- Department of Biology, Eastern Michigan University, Ypsilanti, MI 48197, USA
| | - Hannah S Seidel
- Department of Biology, Eastern Michigan University, Ypsilanti, MI 48197, USA
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12
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Stepwise fate conversion of supporting cells to sensory hair cells in the chick auditory epithelium. iScience 2023; 26:106046. [PMID: 36818302 PMCID: PMC9932131 DOI: 10.1016/j.isci.2023.106046] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 12/17/2022] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
In contrast to mammals, the avian cochlea, specifically the basilar papilla, can regenerate sensory hair cells, which involves fate conversion of supporting cells to hair cells. To determine the mechanisms for converting supporting cells to hair cells, we used single-cell RNA sequencing during hair cell regeneration in explant cultures of chick basilar papillae. We identified dynamic changes in the gene expression of supporting cells, and the pseudotime trajectory analysis demonstrated the stepwise fate conversion from supporting cells to hair cells. Initially, supporting cell identity was erased and transition to the precursor state occurred. A subsequent gain in hair cell identity progressed together with downregulation of precursor-state genes. Transforming growth factor β receptor 1-mediated signaling was involved in induction of the initial step, and its inhibition resulted in suppression of hair cell regeneration. Our data provide new insights for understanding fate conversion from supporting cells to hair cells in avian basilar papillae.
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13
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Nakazawa-Tanaka N, Fujiwara N, Miyahara K, Akazawa C, Urao M, Yamataka A. Increased enteric neural crest cell differentiation after transplantation into aganglionic mouse gut. Pediatr Surg Int 2022; 39:29. [PMID: 36454299 DOI: 10.1007/s00383-022-05324-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/24/2022] [Indexed: 12/03/2022]
Abstract
PURPOSE In recent years, many studies have made considerable progress in the development of stem cell-based therapies for Hirschsprung's disease (HD). However, the question of whether enteric neural crest-derived cells (ENCCs) that are transplanted into the aganglionic gut can migrate, proliferate, and differentiate in a normal manner remains unanswered. Thus, we designed this study to compare the behavior of ENCCs transplanted into the aganglionic gut of endothelin receptor B knockout (Ednrb-KO) mice versus wild-type (WT) mice. METHODS ENCCs were isolated from the fetal guts of Sox10 transgenic mice, in which ENCCs were labeled with an enhanced green fluorescent protein, Venus, on an embryonic day 18.5 (E18.5). Neurospheres were generated and transplanted into the aganglionic region of either Ednrb-KO mice gut, or WT mice gut that had not yet been colonized, on E12.5. Time-lapse imaging of the transplanted ENCCs was performed after 24, 48, and 72 h of culture. Neuronal differentiation was evaluated using whole-mount immunohistochemistry. RESULTS Sox10-positive ENCCs were seen to successfully migrate into the myenteric region of the aganglionic gut following transplantation in both the Ednrb-KO and WT mice. The ratio of Tuj1-positive/Sox10-positive cells was significantly increased after 72 h of culture compared to 24 h in the Ednrb-KO mice, which suggests that the transplanted ENCCs differentiated over time. In addition, at the 72 h timepoint, neuronal differentiation of transplanted ENCC in the aganglionic gut of Ednrb-KO mice was significantly increased compared to that of WT mice. CONCLUSIONS The results of our study demonstrated that transplanted ENCCs migrated into the myenteric region of the aganglionic recipient gut in mice. The increased neuronal differentiation of transplanted ENCC in Endrb-KO mice gut suggests that the microenvironment of this region affects ENCC behavior following transplantation. Further research to explore the characteristics of this microenvironment will improve the potential of developing cell therapy to treat HD patients.
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Affiliation(s)
- Nana Nakazawa-Tanaka
- Department of Pediatric Surgery, Juntendo University Nerima Hospital, 3-1-10 Takanodai Nerima-ku, Tokyo, 177-8521, Japan.
| | - Naho Fujiwara
- Department of Pediatric Surgery, Juntendo University School of Medicine, Tokyo, Japan
| | - Katsumi Miyahara
- Laborotory of Morphology and Image Analysis, Biomedical Research Core Facilities, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Chihiro Akazawa
- Intractable Disease Research Center, Juntendo University School of Medicine, Tokyo, Japan
| | - Masahiko Urao
- Department of Pediatric Surgery, Juntendo University Nerima Hospital, 3-1-10 Takanodai Nerima-ku, Tokyo, 177-8521, Japan
| | - Atsuyuki Yamataka
- Department of Pediatric Surgery, Juntendo University School of Medicine, Tokyo, Japan
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14
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Lee C, Lo M, Chen Y, Lin P, Hsu C, Chen P, Wu C, Hsu JS. Identification of nine novel variants across PAX3, SOX10, EDNRB, and MITF genes in Waardenburg syndrome with next-generation sequencing. Mol Genet Genomic Med 2022; 10:e2082. [PMID: 36331148 PMCID: PMC9747560 DOI: 10.1002/mgg3.2082] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 09/30/2022] [Accepted: 10/21/2022] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Waardenburg syndrome (WS) is a hereditary, genetically heterogeneous disorder characterized by variable presentations of sensorineural hearing impairment and pigmentation anomalies. This study aimed to investigate the clinical features of WS in detail and determine the genetic causes of patients with clinically suspected WS. METHODS A total of 24 patients from 21 Han-Taiwanese families were enrolled and underwent comprehensive physical and audiological examinations. We applied targeted next-generation sequencing (NGS) to investigate the potential causative variants in these patients and further validated the candidate variants through Sanger sequencing. RESULTS We identified 19 causative variants of WS in our cohort. Of these variants, nine were novel and discovered in PAX3, SOX10, EDNRB, and MITF genes, including missense, nonsense, deletion, and splice site variants. Several patients presented with skeletal deformities, hypotonia, megacolon, and neurological disorders that were rarely seen in WS. CONCLUSION This study revealed highly phenotypic variability in Taiwanese WS patients and demonstrated that targeted NGS allowed us to clarify the genetic diagnosis and extend the genetic variant spectrum of WS.
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Affiliation(s)
- Chen‐Yu Lee
- Department of OtolaryngologyNational Taiwan University Hospital, Hsinchu BranchHsinchuTaiwan
| | - Ming‐Yu Lo
- Department of OtolaryngologyNational Taiwan University HospitalTaipeiTaiwan,Graduate Institute of Medical Genomics and Proteomics, College of MedicineNational Taiwan UniversityTaipeiTaiwan
| | - You‐Mei Chen
- Department of Medical GeneticsNational Taiwan University HospitalTaipeiTaiwan
| | - Pei‐Hsuan Lin
- Department of OtolaryngologyNational Taiwan University HospitalTaipeiTaiwan,Department of OtolaryngologyNational Taiwan University Hospital, Yunlin BranchYunlinTaiwan
| | - Chuan‐Jen Hsu
- Department of OtolaryngologyNational Taiwan University HospitalTaipeiTaiwan,Department of OtolaryngologyBuddhist Tzuchi General Hospital, Taichung BranchTaichungTaiwan
| | - Pei‐Lung Chen
- Graduate Institute of Medical Genomics and Proteomics, College of MedicineNational Taiwan UniversityTaipeiTaiwan,Department of Medical GeneticsNational Taiwan University HospitalTaipeiTaiwan
| | - Chen‐Chi Wu
- Department of OtolaryngologyNational Taiwan University HospitalTaipeiTaiwan,Department of Medical ResearchNational Taiwan University Hospital, Hsinchu BranchHsinchuTaiwan
| | - Jacob Shujui Hsu
- Graduate Institute of Medical Genomics and Proteomics, College of MedicineNational Taiwan UniversityTaipeiTaiwan
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15
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Fontanesi L. Genetics and genomics of pigmentation variability in pigs: A review. Livest Sci 2022. [DOI: 10.1016/j.livsci.2022.105079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Ma X, Guo J, Fu Y, Shen C, Jiang P, Zhang Y, Zhang L, Yu Y, Fan J, Chai R. G protein-coupled receptors in cochlea: Potential therapeutic targets for hearing loss. Front Mol Neurosci 2022; 15:1028125. [PMID: 36311029 PMCID: PMC9596917 DOI: 10.3389/fnmol.2022.1028125] [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: 08/25/2022] [Accepted: 09/21/2022] [Indexed: 11/29/2022] Open
Abstract
The prevalence of hearing loss-related diseases caused by different factors is increasing worldwide year by year. Currently, however, the patient’s hearing loss has not been effectively improved. Therefore, there is an urgent need to adopt new treatment measures and treatment techniques to help improve the therapeutic effect of hearing loss. G protein-coupled receptors (GPCRs), as crucial cell surface receptors, can widely participate in different physiological and pathological processes, particularly play an essential role in many disease occurrences and be served as promising therapeutic targets. However, no specific drugs on the market have been found to target the GPCRs of the cochlea. Interestingly, many recent studies have demonstrated that GPCRs can participate in various pathogenic process related to hearing loss in the cochlea including heredity, noise, ototoxic drugs, cochlear structure, and so on. In this review, we comprehensively summarize the functions of 53 GPCRs known in the cochlea and their relationships with hearing loss, and highlight the recent advances of new techniques used in cochlear study including cryo-EM, AI, GPCR drug screening, gene therapy vectors, and CRISPR editing technology, as well as discuss in depth the future direction of novel GPCR-based drug development and gene therapy for cochlear hearing loss. Collectively, this review is to facilitate basic and (pre-) clinical research in this area, and provide beneficial help for emerging GPCR-based cochlear therapies.
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Affiliation(s)
- Xiangyu Ma
- State Key Laboratory of Bioelectronics, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Department of Otolaryngology Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, Advanced Institute for Life and Health, Southeast University, Nanjing, China
| | - Jiamin Guo
- State Key Laboratory of Bioelectronics, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Department of Otolaryngology Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, Advanced Institute for Life and Health, Southeast University, Nanjing, China
| | - Yaoyang Fu
- Department of Psychiatry, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Cangsong Shen
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China
| | - Pei Jiang
- State Key Laboratory of Bioelectronics, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Department of Otolaryngology Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, Advanced Institute for Life and Health, Southeast University, Nanjing, China
| | - Yuan Zhang
- Jiangsu Provincial Key Medical Discipline (Laboratory), Department of Otolaryngology Head and Neck Surgery, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
- Research Institute of Otolaryngology, Nanjing, China
| | - Lei Zhang
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Hospital of Anhui Medical University, Hefei, China
| | - Yafeng Yu
- First Affiliated Hospital of Soochow University, Soochow, China
- *Correspondence: Yafeng Yu,
| | - Jiangang Fan
- Department of Otolaryngology Head and Neck Surgery, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
- Jiangang Fan,
| | - Renjie Chai
- State Key Laboratory of Bioelectronics, Jiangsu Province High-Tech Key Laboratory for Bio-Medical Research, Department of Otolaryngology Head and Neck Surgery, Zhongda Hospital, School of Life Sciences and Technology, Advanced Institute for Life and Health, Southeast University, Nanjing, China
- Department of Otolaryngology Head and Neck Surgery, Sichuan Provincial People’s Hospital, University of Electronic Science and Technology of China, Chengdu, China
- Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, China
- Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- Beijing Key Laboratory of Neural Regeneration and Repair, Capital Medical University, Beijing, China
- Renjie Chai,
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17
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Genetic insights, disease mechanisms, and biological therapeutics for Waardenburg syndrome. Gene Ther 2022; 29:479-497. [PMID: 33633356 DOI: 10.1038/s41434-021-00240-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 01/18/2021] [Accepted: 02/03/2021] [Indexed: 02/06/2023]
Abstract
Waardenburg syndrome (WS), also known as auditory-pigmentary syndrome, is the most common cause of syndromic hearing loss (HL), which accounts for approximately 2-5% of all patients with congenital hearing loss. WS is classified into four subtypes depending on the clinical phenotypes. Currently, pathogenic mutations of PAX3, MITF, SOX10, EDN3, EDNRB or SNAI2 are associated with different subtypes of WS. Although supportive techniques like hearing aids, cochlear implants, or other assistive listening devices can alleviate the HL symptom, there is no cure for WS to date. Recently major progress has been achieved in preclinical studies of genetic HL in animal models, including gene delivery and stem cell replacement therapies. This review focuses on the current understandings of pathogenic mechanisms and potential biological therapeutic approaches for HL in WS, providing strategies and directions for implementing WS biological therapies, as well as possible problems to be faced, in the future.
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18
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Fibroblast morphology, growth rate and gene expression in facial melasma. An Bras Dermatol 2022; 97:575-582. [PMID: 35840442 PMCID: PMC9453522 DOI: 10.1016/j.abd.2021.09.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/07/2021] [Accepted: 09/15/2021] [Indexed: 11/26/2022] Open
Abstract
Background In addition to melanocytic hyperfunction, changes are observed in the upper dermis of melasma, and fibroblasts play a central role in collagen synthesis and pigmentation induction. Objective To explore the morphology, growth rate, and gene expression profile of fibroblasts from the skin with melasma in comparison to fibroblasts from the adjacent healthy skin. Methods Ten women with facial melasma were biopsied (lesion and adjacent healthy skin), and the fragments were processed for fibroblast culture. Samples from five participants were seeded to evaluate growth (days 2, 5 and 8) and senescence (SA-β-gal) curves. The samples from the other participants were submitted to real-time PCR to comparatively evaluation of the expression of 39 genes. Results Cultured fibroblasts from melasma skin were morphologically less fusiform in appearance and on average a 34% (95% CI 4%‒63%) greater proportion of cells labeled with SA-β-gal than the fibroblasts from the adjacent skin. The cell growth rate was lower for the melasma samples after eight days (p < 0.01). TheWNT3A, EDN3, ESR2, PTG2, MMP1, and SOD2 genes were up-regulated, whereas the COL4A1, CSF2, DKK3, COL7A1, TIMP4, CCL2, and CDH11 genes were down-regulated in melasma skin fibroblasts when compared to the ones from adjacent healthy skin. Study limitations Small sample size; absence of functional tests. Conclusions Fibroblasts from the skin with melasma showed a lower growth rate, less fusiform morphology and greater accumulation of SA-β-gal than those from adjacent photo exposed skin. Moreover, their gene expression profile comprised factors that may contribute to upper dermis damage and sustained melanogenesis.
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Bonnamour G, Charrier B, Sallis S, Leduc E, Pilon N. NR2F1 regulates a Schwann cell precursor-vs-melanocyte cell fate switch in a mouse model of Waardenburg syndrome type IV. Pigment Cell Melanoma Res 2022; 35:506-516. [PMID: 35816394 DOI: 10.1111/pcmr.13054] [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: 03/18/2022] [Revised: 06/30/2022] [Accepted: 07/08/2022] [Indexed: 11/27/2022]
Abstract
Waardenburg syndrome type 4 (WS4) combines abnormal development of neural crest cell (NCC)-derived melanocytes (causing depigmentation and inner ear dysfunction) and enteric nervous system (causing aganglionic megacolon). The full spectrum of WS4 phenotype is present in Spot mice, in which an insertional mutation close to a silencer element leads to NCC-specific upregulation of the transcription factor-coding gene Nr2f1. These mice were previously found to develop aganglionic megacolon because of NR2F1-induced premature differentiation of enteric neural progenitors into enteric glia. Intriguingly, this prior work also showed that inner ear dysfunction in Spot mutants specifically affects balance but not hearing, consistent with the absence of melanocytes in the vestibule only. Here, we report an analysis of the effect of Nr2f1 upregulation on the development of both inner ear and skin melanocytes, also taking in consideration their origin relative to the dorsolateral and ventral NCC migration pathways. In the trunk, we found that NR2F1 overabundance in Spot NCCs forces dorso-laterally migrating melanoblasts to abnormally adopt a Schwann cell precursor (SCP) fate and conversely prevents ventrally migrating SCPs to normally adopt a melanoblast fate. In the head, Nr2f1 upregulation appears not to be uniform, which might explain why SCP-derived melanocytes do colonize the cochlea while non-SCP-derived melanocytes cannot reach the vestibule. Collectively, these data point to a key role for NR2F1 in the control of SCP-vs-melanocyte fate choice and unveil a new pathogenic mechanism for WS4. Moreover, our data argue against the proposed existence of a transit-amplifying compartment of melanocyte precursors in hair follicles.
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Affiliation(s)
- Grégoire Bonnamour
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Baptiste Charrier
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Sephora Sallis
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Elizabeth Leduc
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada
| | - Nicolas Pilon
- Molecular Genetics of Development Laboratory, Département des Sciences Biologiques, Université du Québec à Montréal (UQAM), Montréal, Canada.,Centre d'Excellence en Recherche sur les Maladies Orphelines-Fondation Courtois (CERMO-FC), Université du Québec à Montréal, Montréal, Canada.,Département de Pédiatrie, Université de Montréal, Montréal, Canada
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20
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Zada A, Kuil LE, de Graaf BM, Kakiailatu N, Windster JD, Brooks AS, van Slegtenhorst M, de Koning B, Wijnen RMH, Melotte V, Hofstra RMW, Brosens E, Alves MM. TFAP2B Haploinsufficiency Impacts Gastrointestinal Function and Leads to Pediatric Intestinal Pseudo-obstruction. Front Cell Dev Biol 2022; 10:901824. [PMID: 35874825 PMCID: PMC9304996 DOI: 10.3389/fcell.2022.901824] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/14/2022] [Indexed: 11/13/2022] Open
Abstract
Background: Pediatric Intestinal Pseudo-obstruction (PIPO) is a congenital enteric disorder characterized by severe gastrointestinal (GI) dysmotility, without mechanical obstruction. Although several genes have been described to cause this disease, most patients do not receive a genetic diagnosis. Here, we aim to identify the genetic cause of PIPO in a patient diagnosed with severe intestinal dysmotility shortly after birth. Methods: Whole exome sequencing (WES) was performed in the patient and unaffected parents, in a diagnostic setting. After identification of the potential disease-causing variant, its functional consequences were determined in vitro and in vivo. For this, expression constructs with and without the causing variant, were overexpressed in HEK293 cells. To investigate the role of the candidate gene in GI development and function, a zebrafish model was generated where its expression was disrupted using CRISPR/Cas9 editing. Results: WES analysis identified a de novo heterozygous deletion in TFAP2B (NM_003221.4:c.602-5_606delTCTAGTTCCA), classified as a variant of unknown significance. In vitro studies showed that this deletion affects RNA splicing and results in loss of exon 4, leading to the appearance of a premature stop codon and absence of TFAP2B protein. Disruption of tfap2b in zebrafish led to decreased enteric neuronal numbers and delayed transit time. However, no defects in neuronal differentiation were detected. tfap2b crispants also showed decreased levels of ednrbb mRNA, a downstream target of tfap2b. Conclusion: We showed that TFAP2B haploinsufficiency leads to reduced neuronal numbers and GI dysmotility, suggesting for the first time, that this gene is involved in PIPO pathogenesis.
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Affiliation(s)
- Almira Zada
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
- *Correspondence: Almira Zada, ; Maria M. Alves,
| | - Laura E. Kuil
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Bianca M. de Graaf
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Naomi Kakiailatu
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Jonathan D. Windster
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
- Department of Pediatric Surgery, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Alice S. Brooks
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Marjon van Slegtenhorst
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Barbara de Koning
- Department of Pediatric Gastroenterology, Erasmus University Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - René M. H. Wijnen
- Department of Pediatric Surgery, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Veerle Melotte
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
- Department of Pathology, GROW-School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, Netherlands
| | - Robert M. W. Hofstra
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Erwin Brosens
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
| | - Maria M. Alves
- Department of Clinical Genetics, Erasmus Medical Centre-Sophia Children’s Hospital, Rotterdam, Netherlands
- *Correspondence: Almira Zada, ; Maria M. Alves,
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Mahmoud M, Evans I, Wisniewski L, Tam Y, Walsh C, Walker-Samuel S, Frankel P, Scambler P, Zachary I. Bcar1/p130Cas is essential for ventricular development and neural crest cell remodelling of the cardiac outflow tract. Cardiovasc Res 2022; 118:1993-2005. [PMID: 34270692 PMCID: PMC9239580 DOI: 10.1093/cvr/cvab242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Accepted: 07/13/2021] [Indexed: 01/09/2023] Open
Abstract
AIMS The adapter protein p130Cas, encoded by the Bcar1 gene, is a key regulator of cell movement, adhesion, and cell cycle control in diverse cell types. Bcar1 constitutive knockout mice are embryonic lethal by embryonic days (E) 11.5-12.5, but the role of Bcar1 in embryonic development remains unclear. Here, we investigated the role of Bcar1 specifically in cardiovascular development and defined the cellular and molecular mechanisms disrupted following targeted Bcar1 deletions. METHODS AND RESULTS We crossed Bcar1 floxed mice with Cre transgenic lines allowing for cell-specific knockout either in smooth muscle and early cardiac tissues (SM22-Cre), mature smooth muscle cells (smMHC-Cre), endothelial cells (Tie2-Cre), second heart field cells (Mef2c-Cre), or neural crest cells (NCC) (Pax3-Cre) and characterized these conditional knock outs using a combination of histological and molecular biology techniques. Conditional knockout of Bcar1 in SM22-expressing smooth muscle cells and cardiac tissues (Bcar1SM22KO) was embryonically lethal from E14.5-15.5 due to severe cardiovascular defects, including abnormal ventricular development and failure of outflow tract (OFT) septation leading to a single outflow vessel reminiscent of persistent truncus arteriosus. SM22-restricted loss of Bcar1 was associated with failure of OFT cushion cells to undergo differentiation to septal mesenchymal cells positive for SMC-specific α-actin, and disrupted expression of proteins and transcription factors involved in epithelial-to-mesenchymal transformation (EMT). Furthermore, knockout of Bcar1 specifically in NCC (Bcar1PAX3KO) recapitulated part of the OFT septation and aortic sac defects seen in the Bcar1SM22KO mutants, indicating a cell-specific requirement for Bcar1 in NCC essential for OFT septation. In contrast, conditional knockouts of Bcar1 in differentiated smooth muscle, endothelial cells, and second heart field cells survived to term and were phenotypically normal at birth and postnatally. CONCLUSION Our work reveals a cell-specific requirement for Bcar1 in NCC, early myogenic and cardiac cells, essential for OFT septation, myocardialization and EMT/cell cycle regulation and differentiation to myogenic lineages.
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Affiliation(s)
- Marwa Mahmoud
- Centre for Cardiometabolic and Vascular Science, BHF Laboratories, UCL Division of Medicine, 5 University Street, London WC1E 6JF, UK
| | - Ian Evans
- Centre for Cardiometabolic and Vascular Science, BHF Laboratories, UCL Division of Medicine, 5 University Street, London WC1E 6JF, UK
| | - Laura Wisniewski
- Centre for Cardiometabolic and Vascular Science, BHF Laboratories, UCL Division of Medicine, 5 University Street, London WC1E 6JF, UK
| | - Yuen Tam
- Centre for Cardiometabolic and Vascular Science, BHF Laboratories, UCL Division of Medicine, 5 University Street, London WC1E 6JF, UK
| | - Claire Walsh
- UCL Centre for Advanced Biomedical Imaging, Paul O'Gorman Building, 72 Huntley Street, London WC1E 6DD, UK
| | - Simon Walker-Samuel
- UCL Centre for Advanced Biomedical Imaging, Paul O'Gorman Building, 72 Huntley Street, London WC1E 6DD, UK
| | - Paul Frankel
- Institute of Cardiovascular Science, University College London, 5 University Street, London WC1E 6JF, UK
| | - Peter Scambler
- Developmental Biology of Birth Defects Section, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH, UK
| | - Ian Zachary
- Centre for Cardiometabolic and Vascular Science, BHF Laboratories, UCL Division of Medicine, 5 University Street, London WC1E 6JF, UK
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22
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Sahut-Barnola I, Lefrancois-Martinez AM, Dufour D, Jean-Marie BOTTO, Kamilaris C, Faucz FR, Stratakis CA, Val P, Martinez A. Steroidogenic factor-1 lineage origin of skin lesions in Carney complex syndrome. J Invest Dermatol 2022; 142:2949-2957.e9. [PMID: 35568059 DOI: 10.1016/j.jid.2022.04.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 03/28/2022] [Accepted: 04/16/2022] [Indexed: 02/02/2023]
Abstract
Carney complex (CNC) is a rare familial multi-neoplastic syndrome predisposing to endocrine and non-endocrine tumors due to inactivating mutations of PRKAR1A leading to perturbations of the cAMP protein kinase A (PKA) signaling pathway. Skin lesions are the most common manifestation of CNC, including lentigines, blue nevi and cutaneous myxomas, in unusual locations such as oral and genital mucosa. Unlike endocrine disorders, the pathogenesis of skin lesions remains unexplained. Here, we show that embryonic invalidation of the Prkar1a gene in Steroidogenic Factor-1-expressing cells, leads to the development of familial skin pigmentation alterations reminiscent of those in patients. Immunohistological and molecular analyses coupled with genetic monitoring of recombinant cell lineages in mouse skin, suggest that familial lentiginosis and myxomas occurs in skin areas specifically enriched in dermal melanocytes. In lentigines and blue nevi-prone areas from mutant mice and patients, Prkar1a/PRKAR1A invalidation occurs in a subset of dermal fibroblasts capable of inducing, under the influence of PKA signaling, the production of pro-melanogenic EDN3 and HGF signals. Our model strongly suggests that the origin of the typical CNC cutaneous lesions is the result of non-cell-autonomous pro-melanogenic activity of a dermal fibroblast population sharing a community of origin with SF-1 lineage.
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Affiliation(s)
| | | | - Damien Dufour
- iGReD, CNRS, Inserm, Université Clermont-Auvergne, France
| | | | | | | | | | - Pierre Val
- iGReD, CNRS, Inserm, Université Clermont-Auvergne, France
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Advances in the Treatment Strategies in Hypertension: Present and Future. J Cardiovasc Dev Dis 2022; 9:jcdd9030072. [PMID: 35323620 PMCID: PMC8949859 DOI: 10.3390/jcdd9030072] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/27/2022] [Accepted: 03/01/2022] [Indexed: 12/11/2022] Open
Abstract
Hypertension is the most frequent chronic and non-communicable disease all over the world, with about 1.5 billion affected individuals worldwide. Its impact is currently growing, particularly in low-income countries. Even in high-income countries, hypertension remains largely underdiagnosed and undertreated, with consequent low rates of blood pressure (BP) control. Notwithstanding the large number of clinical observational studies and randomized trials over the past four decades, it is sad to note that in the last few years there has been an impressive paucity of innovative studies. Research focused on BP mechanisms and novel antihypertensive drugs is slowing dramatically. The present review discusses some advances in the management of hypertensive patients, and could play a clinical role in the years to come. First, digital/health technology is expected to be increasingly used, although some crucial points remain (development of non-intrusive and clinically validated devices for ambulatory BP measurement, robust storing systems enabling rapid analysis of accrued data, physician-patient interactions, etc.). Second, several areas should be better outlined with regard to BP diagnosis and treatment targets. Third, from a therapeutic standpoint, existing antihypertensive drugs, which are generally effective and well tolerated, should be better used by exploiting available and novel free and fixed combinations. In particular, spironolactone and other mineral-corticoid receptor antagonists should be used more frequently to improve BP control. In particular, some drugs initially developed for conditions different from hypertension including heart failure and diabetes have demonstrated to lower BP significantly and should therefore be considered. Finally, renal artery denervation is another procedure that has proven effective in the management of hypertension.
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Meng X, Jiang L. Prenatal detection of chromosomal abnormalities and copy number variants in fetuses with congenital gastrointestinal obstruction. BMC Pregnancy Childbirth 2022; 22:50. [PMID: 35045821 PMCID: PMC8772214 DOI: 10.1186/s12884-022-04401-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 01/12/2022] [Indexed: 12/13/2022] Open
Abstract
Background Congenital gastrointestinal obstruction (CGIO) mainly refers to the stenosis or atresia of any part from the esophagus to the anus and is one of the most common surgical causes in the neonatal period. The concept of genetic factors as an etiology of CGIO has been accepted, but investigations about CGIO have mainly focused on aneuploidy, and the focus has been on duodenal obstruction. The objective of this study was to evaluate the risk of chromosome aberrations (including numeric and structural aberrations) in different types of CGIO. A second objective was to assess the risk of abnormal CNVs detected by copy number variation sequencing (CNV-seq) in fetuses with different types of CGIO. Methods Data from pregnancies referred for invasive testing and CNV-seq due to sonographic diagnosis of fetal CGIO from 2015 to 2020 were obtained retrospectively from the computerized database. The rates of chromosome aberrations and abnormal CNV-seq findings for isolated CGIOs and complicated CGIOs and different types of CGIOs were calculated. Results Of the 240 fetuses with CGIO that underwent karyotyping, the detection rate of karyotype abnormalities in complicated CGIO was significantly higher than that of the isolated group (33.8% vs. 10.8%, p < 0.01). Ninety-three cases with normal karyotypes further underwent CNV-seq, and CNV-seq revealed an incremental diagnostic value of 9.7% over conventional karyotyping. In addition, the incremental diagnostic yield of CNV-seq analysis in complicated CGIOs (20%) was higher than that in isolated CGIOs (4.8%), and the highest prevalence of pathogenic CNVs/likely pathogenic CNVs was found in the duodenal stenosis/atresia group (17.5%), followed by the anorectal malformation group (15.4%). The 13q deletion, 10q26 deletion, 4q24 deletion, and 2p24 might be additional genetic etiologies of duodenal stenosis/atresia. Conclusions The risk of pathogenic chromosomal abnormalities and CNVs increased in the complicated CGIO group compared to that in the isolated CGIO group, especially when fetuses presented duodenal obstruction (DO) and anorectal malformation. CNV-seq was recommended to detect submicroscopic chromosomal aberrations for DO and anorectal malformation when the karyotype was normal. The relationship between genotypes and phenotypes needs to be explored in the future to facilitate prenatal diagnosis of fetal CGIO and yield new clues into their etiologies.
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25
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Engineering digitizer circuits for chemical and genetic screens in human cells. Nat Commun 2021; 12:6150. [PMID: 34686672 PMCID: PMC8536748 DOI: 10.1038/s41467-021-26359-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 09/30/2021] [Indexed: 12/26/2022] Open
Abstract
Cell-based transcriptional reporters are invaluable in high-throughput compound and CRISPR screens for identifying compounds or genes that can impact a pathway of interest. However, many transcriptional reporters have weak activities and transient responses. This can result in overlooking therapeutic targets and compounds that are difficult to detect, necessitating the resource-consuming process of running multiple screens at various timepoints. Here, we present RADAR, a digitizer circuit for amplifying reporter activity and retaining memory of pathway activation. Reporting on the AP-1 pathway, our circuit identifies compounds with known activity against PKC-related pathways and shows an enhanced dynamic range with improved sensitivity compared to a classical reporter in compound screens. In the first genome-wide pooled CRISPR screen for the AP-1 pathway, RADAR identifies canonical genes from the MAPK and PKC pathways, as well as non-canonical regulators. Thus, our scalable system highlights the benefit and versatility of using genetic circuits in large-scale cell-based screening.
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26
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Pingault V, Zerad L, Bertani-Torres W, Bondurand N. SOX10: 20 years of phenotypic plurality and current understanding of its developmental function. J Med Genet 2021; 59:105-114. [PMID: 34667088 PMCID: PMC8788258 DOI: 10.1136/jmedgenet-2021-108105] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 09/19/2021] [Indexed: 12/25/2022]
Abstract
SOX10 belongs to a family of 20 SRY (sex-determining region Y)-related high mobility group box-containing (SOX) proteins, most of which contribute to cell type specification and differentiation of various lineages. The first clue that SOX10 is essential for development, especially in the neural crest, came with the discovery that heterozygous mutations occurring within and around SOX10 cause Waardenburg syndrome type 4. Since then, heterozygous mutations have been reported in Waardenburg syndrome type 2 (Waardenburg syndrome type without Hirschsprung disease), PCWH or PCW (peripheral demyelinating neuropathy, central dysmyelination, Waardenburg syndrome, with or without Hirschsprung disease), intestinal manifestations beyond Hirschsprung (ie, chronic intestinal pseudo-obstruction), Kallmann syndrome and cancer. All of these diseases are consistent with the regulatory role of SOX10 in various neural crest derivatives (melanocytes, the enteric nervous system, Schwann cells and olfactory ensheathing cells) and extraneural crest tissues (inner ear, oligodendrocytes). The recent evolution of medical practice in constitutional genetics has led to the identification of SOX10 variants in atypical contexts, such as isolated hearing loss or neurodevelopmental disorders, making them more difficult to classify in the absence of both a typical phenotype and specific expertise. Here, we report novel mutations and review those that have already been published and their functional consequences, along with current understanding of SOX10 function in the affected cell types identified through in vivo and in vitro models. We also discuss research options to increase our understanding of the origin of the observed phenotypic variability and improve the diagnosis and medical care of affected patients.
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Affiliation(s)
- Veronique Pingault
- Department of Embryology and Genetics of Malformations, INSERM UMR 1163, Université de Paris and Institut Imagine, Paris, France .,Service de Génétique des Maladies Rares, AP-HP, Hopital Necker-Enfants Malades, Paris, France
| | - Lisa Zerad
- Department of Embryology and Genetics of Malformations, INSERM UMR 1163, Université de Paris and Institut Imagine, Paris, France
| | - William Bertani-Torres
- Department of Embryology and Genetics of Malformations, INSERM UMR 1163, Université de Paris and Institut Imagine, Paris, France
| | - Nadege Bondurand
- Department of Embryology and Genetics of Malformations, INSERM UMR 1163, Université de Paris and Institut Imagine, Paris, France
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27
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Roles of Enteric Neural Stem Cell Niche and Enteric Nervous System Development in Hirschsprung Disease. Int J Mol Sci 2021; 22:ijms22189659. [PMID: 34575824 PMCID: PMC8465795 DOI: 10.3390/ijms22189659] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2021] [Revised: 08/31/2021] [Accepted: 09/03/2021] [Indexed: 12/19/2022] Open
Abstract
The development of the enteric nervous system (ENS) is highly modulated by the synchronized interaction between the enteric neural crest cells (ENCCs) and the neural stem cell niche comprising the gut microenvironment. Genetic defects dysregulating the cellular behaviour(s) of the ENCCs result in incomplete innervation and hence ENS dysfunction. Hirschsprung disease (HSCR) is a rare complex neurocristopathy in which the enteric neural crest-derived cells fail to colonize the distal colon. In addition to ENS defects, increasing evidence suggests that HSCR patients may have intrinsic defects in the niche impairing the extracellular matrix (ECM)-cell interaction and/or dysregulating the cellular niche factors necessary for controlling stem cell behaviour. The niche defects in patients may compromise the regenerative capacity of the stem cell-based therapy and advocate for drug- and niche-based therapies as complementary therapeutic strategies to alleviate/enhance niche-cell interaction. Here, we provide a summary of the current understandings of the role of the enteric neural stem cell niche in modulating the development of the ENS and in the pathogenesis of HSCR. Deciphering the contribution of the niche to HSCR may provide important implications to the development of regenerative medicine for HSCR.
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28
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Chow LS, Bosnakovski D, Mashek DG, Kyba M, Perlingeiro RCR, Magli A. Chromatin accessibility profiling identifies evolutionary conserved loci in activated human satellite cells. Stem Cell Res 2021; 55:102496. [PMID: 34411972 PMCID: PMC8917817 DOI: 10.1016/j.scr.2021.102496] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 07/19/2021] [Accepted: 08/04/2021] [Indexed: 12/04/2022] Open
Abstract
Satellite cells represent the main myogenic population accounting for skeletal muscle homeostasis and regeneration. While our knowledge of the signaling pathways controlling satellite cell regenerative capability is increasing, the underlying epigenetic mechanisms are still not clear, especially in the case of human satellite cells. Here, by performing chromatin accessibility profiling (ATAC-seq) in samples isolated from human and murine muscles, we investigated the changes in the epigenetic landscape occurring during the transition from activated satellite cells to myoblasts. Our analysis identifies a compendium of putative regulatory elements defining human activated satellite cells and myoblasts, respectively. A subset of these differentially accessible loci is shared by both murine and human satellite cells, includes elements associated with known self-renewal regulators, and is enriched for motifs bound by transcription factors participating in satellite cell regulation. Integration of transcriptional and epigenetic data reveals that known regulators of metabolic gene expression, such as PPARGC1A, represent potential PAX7 targets. Through characterization of genomic networks and the underlying effectors, our data represent an important starting point for decoding and manipulating the molecular mechanisms underlying human satellite cell muscle regenerative potential.
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Affiliation(s)
- Lisa S Chow
- Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Darko Bosnakovski
- Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, USA; Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA; University Goce Delcev - Shtip, Faculty of Medical Sciences, Shtip, Macedonia
| | - Douglas G Mashek
- Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, University of Minnesota, Minneapolis, MN, USA; Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, MN, USA
| | - Michael Kyba
- Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, USA; Department of Pediatrics, University of Minnesota, Minneapolis, MN, USA; Stem Cell Institute, University of Minnesota, Minneapolis, MN, USA
| | - Rita C R Perlingeiro
- Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, USA; Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN USA; Stem Cell Institute, University of Minnesota, Minneapolis, MN, USA
| | - Alessandro Magli
- Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, USA; Division of Cardiology, Department of Medicine, University of Minnesota, Minneapolis, MN USA; Stem Cell Institute, University of Minnesota, Minneapolis, MN, USA.
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29
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Kang YN, Fung C, Vanden Berghe P. Gut innervation and enteric nervous system development: a spatial, temporal and molecular tour de force. Development 2021; 148:148/3/dev182543. [PMID: 33558316 DOI: 10.1242/dev.182543] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
During embryonic development, the gut is innervated by intrinsic (enteric) and extrinsic nerves. Focusing on mammalian ENS development, in this Review we highlight how important the different compartments of this innervation are to assure proper gut function. We specifically address the three-dimensional architecture of the innervation, paying special attention to the differences in development along the longitudinal and circumferential axes of the gut. We review recent information about the formation of both intrinsic innervation, which is fairly well-known, as well as the establishment of the extrinsic innervation, which, despite its importance in gut-brain signaling, has received much less attention. We further discuss how external microbial and nutritional cues or neuroimmune interactions may influence development of gut innervation. Finally, we provide summary tables, describing the location and function of several well-known molecules, along with some newer factors that have more recently been implicated in the development of gut innervation.
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Affiliation(s)
- Yi-Ning Kang
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven 3000, Belgium
| | - Candice Fung
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven 3000, Belgium
| | - Pieter Vanden Berghe
- Laboratory for Enteric NeuroScience (LENS), Translational Research Center for Gastrointestinal Disorders (TARGID), University of Leuven, Leuven 3000, Belgium
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30
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Varga L, Danis D, Drsata J, Masindova I, Skopkova M, Slobodova Z, Chrobok V, Profant M, Gasperikova D. Novel variants in EDNRB gene in Waardenburg syndrome type II and SOX10 gene in PCWH syndrome. Int J Pediatr Otorhinolaryngol 2021; 140:110499. [PMID: 33234331 DOI: 10.1016/j.ijporl.2020.110499] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 11/11/2020] [Indexed: 10/23/2022]
Abstract
Waardenburg syndrome (WS) is a clinically and genetically heterogeneous group of inherited disorders manifesting with sensorineural hearing loss and pigmentary anomalies. Here we present two Caucasian families with novel variants in EDNRB and SOX10 representing both sides of phenotype spectrum in WS. The c.521G>A variant in EDNRB identified in Family 1 leads to disruption of the cysteine disulfide bridge between extracellular segments of endothelin receptor type B and causes relatively mild phenotype of WS type II with low penetrance. The novel nonsense variant c.900C>A in SOX10 detected in Family 2 leads to PCWH syndrome and was found to be lethal.
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Affiliation(s)
- Lukas Varga
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine and University Hospital, Comenius University Bratislava, Slovakia; DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Daniel Danis
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Jakub Drsata
- Department of Otorhinolaryngology and Head and Neck Surgery, University Hospital Hradec Kralove, Charles University, Faculty of Medicine in Hradec Kralove, Czech Republic.
| | - Ivica Masindova
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Martina Skopkova
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Zuzana Slobodova
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine and University Hospital, Comenius University Bratislava, Slovakia; DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia.
| | - Viktor Chrobok
- Department of Otorhinolaryngology and Head and Neck Surgery, University Hospital Hradec Kralove, Charles University, Faculty of Medicine in Hradec Kralove, Czech Republic.
| | - Milan Profant
- Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine and University Hospital, Comenius University Bratislava, Slovakia.
| | - Daniela Gasperikova
- DIABGENE Laboratory, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia.
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31
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Pawolski V, Schmidt MHH. Neuron-Glia Interaction in the Developing and Adult Enteric Nervous System. Cells 2020; 10:E47. [PMID: 33396231 PMCID: PMC7823798 DOI: 10.3390/cells10010047] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/17/2020] [Accepted: 12/29/2020] [Indexed: 12/31/2022] Open
Abstract
The enteric nervous system (ENS) constitutes the largest part of the peripheral nervous system. In recent years, ENS development and its neurogenetic capacity in homeostasis and allostasishave gained increasing attention. Developmentally, the neural precursors of the ENS are mainly derived from vagal and sacral neural crest cell portions. Furthermore, Schwann cell precursors, as well as endodermal pancreatic progenitors, participate in ENS formation. Neural precursorsenherite three subpopulations: a bipotent neuron-glia, a neuronal-fated and a glial-fated subpopulation. Typically, enteric neural precursors migrate along the entire bowel to the anal end, chemoattracted by glial cell-derived neurotrophic factor (GDNF) and endothelin 3 (EDN3) molecules. During migration, a fraction undergoes differentiation into neurons and glial cells. Differentiation is regulated by bone morphogenetic proteins (BMP), Hedgehog and Notch signalling. The fully formed adult ENS may react to injury and damage with neurogenesis and gliogenesis. Nevertheless, the origin of differentiating cells is currently under debate. Putative candidates are an embryonic-like enteric neural progenitor population, Schwann cell precursors and transdifferentiating glial cells. These cells can be isolated and propagated in culture as adult ENS progenitors and may be used for cell transplantation therapies for treating enteric aganglionosis in Chagas and Hirschsprung's diseases.
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Affiliation(s)
| | - Mirko H. H. Schmidt
- Institute of Anatomy, Medical Faculty Carl Gustav Carus, Technische Universität Dresden School of Medicine, 01307 Dresden, Germany;
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32
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Mesenteric Neural Crest Cells Are the Embryological Basis of Skip Segment Hirschsprung's Disease. Cell Mol Gastroenterol Hepatol 2020; 12:1-24. [PMID: 33340715 PMCID: PMC8082118 DOI: 10.1016/j.jcmgh.2020.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 12/14/2020] [Accepted: 12/14/2020] [Indexed: 12/22/2022]
Abstract
BACKGROUND & AIMS Defective rostrocaudal colonization of the gut by vagal neural crest cells (vNCCs) results in Hirschsprung's disease (HSCR), which is characterized by aganglionosis in variable lengths of the distal bowel. Skip segment Hirschsprung's disease (SSHD), referring to a ganglionated segment within an otherwise aganglionic intestine, contradicts HSCR pathogenesis and underscores a significant gap in our understanding of the development of the enteric nervous system. Here, we aimed to identify the embryonic origin of the ganglionic segments in SSHD. METHODS Intestinal biopsy specimens from HSCR patients were prepared via the Swiss-roll technique to search for SSHD cases. NCC migration from the neural tube to the gut was spatiotemporally traced using targeted cell lineages and gene manipulation in mice. RESULTS After invading the mesentery surrounding the foregut, vNCCs separated into 2 populations: mesenteric NCCs (mNCCs) proceeded to migrate along the mesentery, whereas enteric NCCs invaded the foregut to migrate along the gut. mNCCs not only produced neurons and glia within the gut mesentery, but also continuously complemented the enteric NCC pool. Two new cases of SSHD were identified from 183 HSCR patients, and Ednrb-mutant mice, but not Ret-/- mice, showed a high incidence rate of SSHD-like phenotypes. CONCLUSIONS mNCCs, a subset of vNCCs that migrate into the gut via the gut mesentery to give rise to enteric neurons, could provide an embryologic explanation for SSHD. These findings lead to novel insights into the development of the enteric nervous system and the etiology of HSCR.
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Park DJ, Ha S, Choi JS, Lee SH, Park JE, Seo YJ. Induced Short-Term Hearing Loss due to Stimulation of Age-Related Factors by Intermittent Hypoxia, High-Fat Diet, and Galactose Injection. Int J Mol Sci 2020; 21:ijms21197068. [PMID: 32992845 PMCID: PMC7582260 DOI: 10.3390/ijms21197068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/23/2020] [Accepted: 09/23/2020] [Indexed: 12/17/2022] Open
Abstract
Age-related hearing loss (ARHL) is the most common sensory disorder among the elderly, associated with aging and auditory hair cell death due to oxidative-stress-induced mitochondrial dysfunction. Although transgenic mice and long-term aging induction cultures have been used to study ARHL, there are currently no ARHL animal models that can be stimulated by intermittent environmental changes. In this study, an ARHL animal model was established by inducing continuous oxidative stress to promote short-term aging of cells, determined on the basis of expression of hearing-loss-induced phenotypes and aging-related factors. The incidence of hearing loss was significantly higher in dual- and triple-exposure conditions than in intermittent hypoxic conditions, high-fat diet (HFD), or d-galactose injection alone. Continuous oxidative stress and HFD accelerated cellular aging. An increase in Ucp2, usually expressed during mitochondrial dysfunction, was observed. Expression of Cdh23, Slc26a4, Kcnq4, Myo7a, and Myo6, which are ARHL-related factors, were modified by oxidative stress in the cells of the hearing organ. We found that intermittent hypoxia, HFD, and galactose injection accelerated cellular aging in the short term. Thus, we anticipate that the development of this hearing loss animal model, which reflects the effects of intermittent environmental changes, will benefit future research on ARHL.
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Affiliation(s)
- Dong Jun Park
- Department of Otorhinolaryngology, Yonsei University Wonju College of Medicine, 20 Ilsan-ro, Wonju, Gangwon-do 26426, Korea; (D.J.P.); (J.S.C.); (S.H.L.)
| | - Sunmok Ha
- Department of Biomedical Laboratory Science, College of Health Sciences, Yonsei University, wonju 26493, Korea;
| | - Jin Sil Choi
- Department of Otorhinolaryngology, Yonsei University Wonju College of Medicine, 20 Ilsan-ro, Wonju, Gangwon-do 26426, Korea; (D.J.P.); (J.S.C.); (S.H.L.)
| | - Su Hoon Lee
- Department of Otorhinolaryngology, Yonsei University Wonju College of Medicine, 20 Ilsan-ro, Wonju, Gangwon-do 26426, Korea; (D.J.P.); (J.S.C.); (S.H.L.)
| | - Jeong-Eun Park
- Department of Otorhinolaryngology Head and Neck Surgery, Hallym University College of Medicine, Dongtan Sacred Heart Hospital, Hwaseong 18450, Korea;
| | - Young Joon Seo
- Department of Otorhinolaryngology, Yonsei University Wonju College of Medicine, 20 Ilsan-ro, Wonju, Gangwon-do 26426, Korea; (D.J.P.); (J.S.C.); (S.H.L.)
- Correspondence: ; Tel.: +82-33-741-0644
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Square TA, Jandzik D, Massey JL, Romášek M, Stein HP, Hansen AW, Purkayastha A, Cattell MV, Medeiros DM. Evolution of the endothelin pathway drove neural crest cell diversification. Nature 2020; 585:563-568. [PMID: 32939088 DOI: 10.1038/s41586-020-2720-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/24/2020] [Indexed: 12/13/2022]
Abstract
Neural crest cells (NCCs) are migratory, multipotent embryonic cells that are unique to vertebrates and form an array of clade-defining adult features. The evolution of NCCs has been linked to various genomic events, including the evolution of new gene-regulatory networks1,2, the de novo evolution of genes3 and the proliferation of paralogous genes during genome-wide duplication events4. However, conclusive functional evidence linking new and/or duplicated genes to NCC evolution is lacking. Endothelin ligands (Edns) and endothelin receptors (Ednrs) are unique to vertebrates3,5,6, and regulate multiple aspects of NCC development in jawed vertebrates7-10. Here, to test whether the evolution of Edn signalling was a driver of NCC evolution, we used CRISPR-Cas9 mutagenesis11 to disrupt edn, ednr and dlx genes in the sea lamprey, Petromyzon marinus. Lampreys are jawless fishes that last shared a common ancestor with modern jawed vertebrates around 500 million years ago12. Thus, comparisons between lampreys and gnathostomes can identify deeply conserved and evolutionarily flexible features of vertebrate development. Using the frog Xenopus laevis to expand gnathostome phylogenetic representation and facilitate side-by-side analyses, we identify ancient and lineage-specific roles for Edn signalling. These findings suggest that Edn signalling was activated in NCCs before duplication of the vertebrate genome. Then, after one or more genome-wide duplications in the vertebrate stem, paralogous Edn pathways functionally diverged, resulting in NCC subpopulations with different Edn signalling requirements. We posit that this new developmental modularity facilitated the independent evolution of NCC derivatives in stem vertebrates. Consistent with this, differences in Edn pathway targets are associated with differences in the oropharyngeal skeleton and autonomic nervous system of lampreys and modern gnathostomes. In summary, our work provides functional genetic evidence linking the origin and duplication of new vertebrate genes with the stepwise evolution of a defining vertebrate novelty.
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Affiliation(s)
- Tyler A Square
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA. .,Department of Molecular and Cellular Biology, University of California, Berkeley, CA, USA.
| | - David Jandzik
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA. .,Department of Zoology, Comenius University in Bratislava, Bratislava, Slovakia. .,Department of Zoology, Charles University in Prague, Prague, Czech Republic.
| | - James L Massey
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA
| | - Marek Romášek
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.,Gymnázium Jiřího Wolkera, Prostějov, Czech Republic
| | - Haley P Stein
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA
| | - Andrew W Hansen
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA
| | - Amrita Purkayastha
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA
| | - Maria V Cattell
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.,Department of Biology, Metropolitan State University, Denver, CO, USA
| | - Daniel M Medeiros
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.
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Decreased expression of β1 integrin in enteric neural crest cells of the endothelin receptor B null mouse model. Pediatr Surg Int 2020; 36:43-48. [PMID: 31576467 DOI: 10.1007/s00383-019-04578-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/12/2019] [Indexed: 10/25/2022]
Abstract
BACKGROUND Interactions between enteric neural crest-derived cells (ENCC) and the surrounding intestinal microenvironment, such as the extracellular matrix (ECM), are critical for regulating enteric nervous system (ENS) development. Integrins are the major receptors for ECM molecules, such as laminin, which have been reported to be involved in the pathogenesis of Hirschsprung's disease. In this study, we examined the expression of β1 integrin in the endothelin receptor B (Ednrb) knock out (KO) mouse gut, which presents with an aganglionic colon. METHODS A Sox10-Venus-positive Ednrb KO mouse, where ENCC is labeled with fluorescent protein, 'Venus', was created. Sox10-Venus-positive Ednrb wild type (WT) were used as controls. Small intestine, proximal colon and distal colon were dissected on E13.5 and E15.5 and β1 integrin expression of the gut tissue was examined by immunohistochemistry and real time RT-PCR. The cells of the gut dissected on E11.5 were isolated and cultured for 2 days. Venus-positive ENCC were immunostained with β1 integrin and Tuj-1, which is a marker for neurons. RESULTS The expression of β1 integrin was not significantly different between KO and WT in all parts of the gut examined. However, the β1 integrin expression in the isolated ENCC was significantly decreased in KO compared to WT. The average threshold area was 42.98 ± 17.47% in KO and 73.53 ± 13.77 in WT (p < 0.001). CONCLUSIONS We demonstrated that β1 integrin expression was specifically decreased in ENCC in Ednrb KO mice. Our results suggest that impaired interaction between integrin and its ligands may disturb normal ENS development, resulting in an aganglionic colon.
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Liu H, Luo Q, Zhang J, Mo C, Wang Y, Li J. Endothelins (EDN1, EDN2, EDN3) and their receptors (EDNRA, EDNRB, EDNRB2) in chickens: Functional analysis and tissue distribution. Gen Comp Endocrinol 2019; 283:113231. [PMID: 31351053 DOI: 10.1016/j.ygcen.2019.113231] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 07/16/2019] [Accepted: 07/23/2019] [Indexed: 11/27/2022]
Abstract
Endothelins (EDNs) and their receptors (EDNRs) are reported to be involved in the regulation of many physiological/pathological processes, such as cardiovascular development and functions, pulmonary hypertension, neural crest cell proliferation, differentiation and migration, pigmentation, and plumage in chickens. However, the functionality, signaling, and tissue expression of avian EDN-EDNRs have not been fully characterized, thus impeding our comprehensive understanding of their roles in this model vertebrate species. Here, we reported the cDNAs of three EDN genes (EDN1, EDN2, EDN3) and examined the functionality and expression of the three EDNs and their receptors (EDNRA, EDNRB and EDNRB2) in chickens. The results showed that: 1) chicken (c-) EDN1, EDN2, and EDN3 cDNAs were predicted to encode bioactive EDN peptides of 21 amino acids, which show remarkable degree of amino acid sequence identities (91-95%) to their respective mammalian orthologs; 2) chicken (c-) EDNRA expressed in HEK293 cells could be preferentially activated by chicken EDN1 and EDN2, monitored by the three cell-based luciferase reporter assays, indicating that cEDNRA is a functional receptor common for both cEDN1 and cEDN2. In contrast, both cEDNRB and cEDNRB2 could be activated by all three EDN peptides with similar potencies, indicating that both receptors can function as common receptors for the three EDNs and share functional similarity. Moreover, activation of three EDNRs could stimulate intracellular calcium, MAPK/ERK, and cAMP/PKA signaling pathways. 3) qPCR assay revealed that cEDNs and cEDNRs are widely, but differentially, expressed in adult chicken tissues. Taken together, our data establishes a clear molecular basis to uncover the physiological/pathological roles of EDN-EDNR system in birds and helps to reveal the conserved actions of EDN-EDNR signaling across vertebrates.
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Affiliation(s)
- Haikun Liu
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, PR China
| | - Qin Luo
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, PR China
| | - Jiannan Zhang
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, PR China
| | - Chunheng Mo
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, PR China
| | - Yajun Wang
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, PR China
| | - Juan Li
- Key Laboratory of Bio-resources and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu 610065, PR China.
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Naz S, Friedman TB. Growth factor and receptor malfunctions associated with human genetic deafness. Clin Genet 2019; 97:138-155. [PMID: 31506927 DOI: 10.1111/cge.13641] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 08/22/2019] [Accepted: 09/03/2019] [Indexed: 12/12/2022]
Abstract
A variety of different signaling pathways are necessary for development and maintenance of the human auditory system. Normal hearing allows for the detection of soft sounds within the frequency range of 20 to 20 000 Hz, but more importantly to perceive the human voice frequency band of 250 to 6000 Hz. Loss of hearing is common, and is a clinically heterogeneous disorder that can be caused by environmental factors such as exposure to loud noise, infections and ototoxic drugs. In addition, variants of hundreds of genes have been reported to disrupt processes required for hearing. Noncoding regulatory variants and variants of additional genes necessary for hearing remain to be discovered as many individuals with inherited deafness are without a genetic diagnosis, despite the advent of whole exome sequencing. Here, we discuss in detail some of these deafness-causing variants of genes encoding a ligand or its receptor. Spotlighted in this review are three growth factor-receptor-pairs EDN3/EDNRB, HGF/MET and JAG/NOTCH, which individually are necessary for normal hearing. We also offer our perspective on unanswered questions, future challenges and potential opportunities for treatments emerging from molecular genetic and mechanistic studies of deafness due to these causes.
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Affiliation(s)
- Sadaf Naz
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Thomas B Friedman
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland
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