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Rencuzogullari E, Ezer BG. A new variant of the ectodysplasin A receptor death domain gene associated with anhidrotic ectodermal dysplasia in a Turkish family and its simple diagnosis by restriction fragment length polymorphism. Genes Genet Syst 2023; 98:171-178. [PMID: 37673591 DOI: 10.1266/ggs.22-00138] [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: 09/08/2023] Open
Abstract
Ectodermal dysplasia (ED), which exhibits a wide range of clinical symptoms, may be classified into three major types: hypohidrotic, anhidrotic, and hidrotic. A male child (proband) showing anhidrotic dysplasia was used as the subject of this study. The biopsy of the big toe revealed that the male child had no sweat glands. Genetic analysis of the patient revealed a mutation caused by a homozygous nucleotide substitution in the EDAR-associated death domain (EDARADD) (rs114632254) gene c.439G>A (p.Gly147Arg). Phenotypically, his teeth were sharp, but eight teeth were missing (oligodontia). The patient had normal nails with dry skin, sparse hair, everted lower lip vermilion, hyperpigmented eyelids, and abnormal nasal bridge morphology around the eyes. There is also a homozygous dominant (healthy) female and a heterozygous male in this family, who are cousins (aunt children) to the heterozygous parents. The daughter of the patient was also heterozygous. This mutation represents homozygous recessive inheritance, which we describe for the first time. Furthermore, we demonstrated that this genetic disorder can be readily diagnosed using the restriction fragment length polymorphism (RFLP) method after digestion with MnII restriction endonuclease.
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Affiliation(s)
| | - Banu Guven Ezer
- Department of Biology, Institute of Graduate Education, Adiyaman University
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2
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Hussain SI, Muhammad N, Shah SUD, Fardous F, Khan SA, Khan N, Rehman AU, Siddique M, Wasan SA, Niaz R, Ullah H, Khan N, Muhammad N, Mirza MU, Wasif N, Khan S. Structural and functional implications of SLC13A3 and SLC9A6 mutations: an in silico approach to understanding intellectual disability. BMC Neurol 2023; 23:353. [PMID: 37794328 PMCID: PMC10548666 DOI: 10.1186/s12883-023-03397-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 09/20/2023] [Indexed: 10/06/2023] Open
Abstract
BACKGROUND Intellectual disability (ID) is a condition that varies widely in both its clinical presentation and its genetic underpinnings. It significantly impacts patients' learning capacities and lowers their IQ below 70. The solute carrier (SLC) family is the most abundant class of transmembrane transporters and is responsible for the translocation of various substances across cell membranes, including nutrients, ions, metabolites, and medicines. The SLC13A3 gene encodes a plasma membrane-localized Na+/dicarboxylate cotransporter 3 (NaDC3) primarily expressed in the kidney, astrocytes, and the choroid plexus. In addition to three Na + ions, it brings four to six carbon dicarboxylates into the cytosol. Recently, it was discovered that patients with acute reversible leukoencephalopathy and a-ketoglutarate accumulation (ARLIAK) carry pathogenic mutations in the SLC13A3 gene, and the X-linked neurodevelopmental condition Christianson Syndrome is caused by mutations in the SLC9A6 gene, which encodes the recycling endosomal alkali cation/proton exchanger NHE6, also called sodium-hydrogen exchanger-6. As a result, there are severe impairments in the patient's mental capacity, physical skills, and adaptive behavior. METHODS AND RESULTS Two Pakistani families (A and B) with autosomal recessive and X-linked intellectual disorders were clinically evaluated, and two novel disease-causing variants in the SLC13A3 gene (NM 022829.5) and the SLC9A6 gene (NM 001042537.2) were identified using whole exome sequencing. Family-A segregated a novel homozygous missense variant (c.1478 C > T; p. Pro493Leu) in the exon-11 of the SLC13A3 gene. At the same time, family-B segregated a novel missense variant (c.1342G > A; p.Gly448Arg) in the exon-10 of the SLC9A6 gene. By integrating computational approaches, our findings provided insights into the molecular mechanisms underlying the development of ID in individuals with SLC13A3 and SLC9A6 mutations. CONCLUSION We have utilized in-silico tools in the current study to examine the deleterious effects of the identified variants, which carry the potential to understand the genotype-phenotype relationships in neurodevelopmental disorders.
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Affiliation(s)
- Syeda Iqra Hussain
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Nazif Muhammad
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Salah Ud Din Shah
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Fardous Fardous
- Department of Medical Lab Technology, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Sher Alam Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Niamatullah Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Adil U Rehman
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Mehwish Siddique
- Department of Zoology, Government Post Graduate College for Women, Satellite Town, Gujranwala, Pakistan
| | - Shoukat Ali Wasan
- Department of Botany, Faculty of Natural Sciences, Shah Abdul Latif University, Khairpur, Sindh, Pakistan
| | - Rooh Niaz
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Hafiz Ullah
- Gomal Center of Biochemistry and Biotechnology (GCBB), Gomal University D. I. Khan, D. I. Khan, Pakistan
| | - Niamat Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Noor Muhammad
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Usman Mirza
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, N9B 1C4, Canada
| | - Naveed Wasif
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, 89081, Ulm, Germany.
- Institute of Human Genetics, University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Germany.
| | - Saadullah Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan.
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Kovalskaia VA, Cherevatova TB, Polyakov AV, Ryzhkova OP. Molecular basis and genetics of hypohidrotic ectodermal dysplasias. Vavilovskii Zhurnal Genet Selektsii 2023; 27:676-683. [PMID: 38023809 PMCID: PMC10643535 DOI: 10.18699/vjgb-23-78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 02/06/2023] [Accepted: 03/24/2023] [Indexed: 12/01/2023] Open
Abstract
Ectodermal dysplasia (ED) is a heterogeneous group of hereditary diseases of the skin and its appendages, which are characterized by impaired development and/or homeostasis of two or more ectoderm derivatives, including: hair, teeth, nails, sweat glands and their modifications (mammary glands, for instance). The overall prevalence of ectodermal dysplasia remains precisely unknown not only in Russia, but also in the world, nor is known the contribution of individual genes to its structure. This complicates the DNA diagnosis establishment of this disease due to the lack of an accurate diagnostic algorithm and a universal cost-effective method of analysis. To date, the most highly-researched genes involved in the development of anhydrous or hypohidrotic forms of ED are EDA, EDAR, EDARADD and WNT10A. The ectodysplasin A (EDA) gene is the cause of the most common X-linked form of ED, a gene from the Wnt family (WNT10A) is responsible for the autosomal recessive form of the disease, and two other genes (EDAR and EDARADD) can cause both autosomal recessive and autosomal dominant forms. This review provides the characteristics of the genes involved in ED, their mutation spectra, the level of their expression in human tissues, as well as the interrelation of the aforementioned genes. The domain structures of the corresponding proteins are considered, as well as the molecular genetic pathways in which they are involved. Animal models for studying this disorder are also taken into consideration. Due to the cross-species genes conservation, their mutations cause the disruption of the development of ectoderm derivatives not only in humans, but also in mice, cows, dogs, and even fish. It can be exploited for a better understanding of the etiopathogenesis of ectodermal dysplasias. Moreover, this article brings up the possibility of recurrent mutations in the EDA and WNT10A genes. The review also presents data on promising approaches for intrauterine ED treatment.
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Affiliation(s)
| | | | - A V Polyakov
- Research Centre for Medical Genetics, Moscow, Russia
| | - O P Ryzhkova
- Research Centre for Medical Genetics, Moscow, Russia
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Muhammad N, Hussain SI, Rehman ZU, Khan SA, Jan S, Khan N, Muzammal M, Abbasi SW, Kakar N, Rehman ZU, Khan MA, Mirza MU, Muhammad N, Khan S, Wasif N. Autosomal recessive variants c.953A>C and c.97-1G>C in NSUN2 causing intellectual disability: a molecular dynamics simulation study of loss-of-function mechanisms. Front Neurol 2023; 14:1168307. [PMID: 37305761 PMCID: PMC10249782 DOI: 10.3389/fneur.2023.1168307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 04/28/2023] [Indexed: 06/13/2023] Open
Abstract
Introduction Intellectual disability (ID) is a clinically and genetically heterogeneous disorder. It drastically affects the learning capabilities of patients and eventually reduces their IQ level below 70. Methods The current genetic study ascertained two consanguineous Pakistani families suffering from autosomal recessive intellectual developmental disorder-5 (MRT5). We have used exome sequencing followed by Sanger sequencing to identify the disease-causing variants. Results and discussion Genetic analysis using whole exome sequencing in these families identified two novel mutations in the NSUN2 (NM_017755.5). Family-A segregated a novel missense variant c.953A>C; p.Tyr318Ser in exon-9 of the NSUN2. The variant substituted an amino acid Tyr318, highly conserved among different animal species and located in the functional domain of NSUN2 known as "SAM-dependent methyltransferase RsmB/NOP2-type". Whereas in family B, we identified a novel splice site variant c.97-1G>C that affects the splice acceptor site of NSUN2. The identified splice variant (c.97-1G>C) was predicted to result in the skipping of exon-2, which would lead to a frameshift followed by a premature stop codon (p. His86Profs*16). Furthermore, it could result in the termination of translation and synthesis of dysfunctional protein, most likely leading to nonsense-mediated decay. The dynamic consequences of NSUN2 missense variant was further explored together with wildtype through molecular dynamic simulations, which uncovered the disruption of NSUN2 function due to a gain in structural flexibility. The present molecular genetic study further extends the mutational spectrum of NSUN2 to be involved in ID and its genetic heterogeneity in the Pakistani population.
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Affiliation(s)
- Nazif Muhammad
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Syeda Iqra Hussain
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Zia Ur Rehman
- Department of General Medicine, Northwest General Hospital & Research Center, Peshawar, Khyber Pakhtunkhwa, Pakistan
| | - Sher Alam Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Samin Jan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Niamatullah Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Muzammal
- Gomal Center of Biochemistry and Biotechnology, Gomal University, D.I.Khan, Khyber Pakhtunkhwa, Pakistan
| | - Sumra Wajid Abbasi
- NUMS Department of Biological Sciences, National University of Medical Sciences, The Mall, Rawalpindi, Punjab, Pakistan
| | - Naseebullah Kakar
- Department of Biotechnology, Faculty of Life Sciences and Informatics, BUITEMS, Quetta, Pakistan
- Institute of Human Genetics, Universitätsklinikum Schleswig-Holstein, Lübeck, Germany
| | - Zia Ur Rehman
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Muzammil Ahmad Khan
- Gomal Center of Biochemistry and Biotechnology, Gomal University, D.I.Khan, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Usman Mirza
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, Canada
| | - Noor Muhammad
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Saadullah Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology (KUST), Kohat, Khyber Pakhtunkhwa, Pakistan
| | - Naveed Wasif
- Institute of Human Genetics, Ulm University, and Ulm University Medical Center, Ulm, Germany
- Institute of Human Genetics, University Hospital Schleswig-Holstein, Kiel, Germany
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5
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Ou S, Jeyalatha MV, Mao Y, Wang J, Chen C, Zhang M, Liu X, Liang M, Lin S, Wu Y, Li Y, Li W. The Role of Ectodysplasin A on the Ocular Surface Homeostasis. Int J Mol Sci 2022; 23:ijms232415700. [PMID: 36555342 PMCID: PMC9779463 DOI: 10.3390/ijms232415700] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/12/2022] [Accepted: 12/02/2022] [Indexed: 12/14/2022] Open
Abstract
Ectodysplasin A (EDA), a ligand of the TNF family, plays an important role in maintaining the homeostasis of the ocular surface. EDA is necessary for the development of the meibomian gland, the lacrimal gland, as well as the proliferation and barrier function of the corneal epithelium. The mutation of EDA can induce the destruction of the ocular surface resulting in keratopathy, abnormality of the meibomian gland and maturation of the lacrimal gland. Experimental animal studies showed that a prenatal ultrasound-guided intra-amniotic injection or postnatal intravenous administration of soluble recombinant EDA protein can efficiently prevent the development of ocular surface abnormalities in EDA mutant animals. Furthermore, local application of EDA could restore the damaged ocular surface to some extent. Hence, a recombinant EDA-based therapy may serve as a novel paradigm to treat ocular surface disorders, such as meibomian gland dysfunction and corneal epithelium abnormalities.
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Affiliation(s)
- Shangkun Ou
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Corneal & Ocular Surface Diseases, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Mani Vimalin Jeyalatha
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
| | - Yi Mao
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Junqi Wang
- Department of Ophthalmology, Graduate School of Medicine, Osaka 5650871, Japan
| | - Chao Chen
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Minjie Zhang
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Xiaodong Liu
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Minghui Liang
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Sijie Lin
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Yiming Wu
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Ophthalmology and Visual Science, Xiamen 361000, China
| | - Yixuan Li
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
| | - Wei Li
- Eye Institute of Xiamen University and Affiliated Xiamen Eye Center, School of Medicine, Xiamen University, Xiamen 361000, China
- Fujian Provincial Key Laboratory of Corneal & Ocular Surface Diseases, Xiamen 361000, China
- Xiang’an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361000, China
- Correspondence: ; Tel./Fax: +86-592-2183761
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6
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The concept of intrinsic versus extrinsic apoptosis. Biochem J 2022; 479:357-384. [PMID: 35147165 DOI: 10.1042/bcj20210854] [Citation(s) in RCA: 64] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 12/12/2022]
Abstract
Regulated cell death is a vital and dynamic process in multicellular organisms that maintains tissue homeostasis and eliminates potentially dangerous cells. Apoptosis, one of the better-known forms of regulated cell death, is activated when cell-surface death receptors like Fas are engaged by their ligands (the extrinsic pathway) or when BCL-2-family pro-apoptotic proteins cause the permeabilization of the mitochondrial outer membrane (the intrinsic pathway). Both the intrinsic and extrinsic pathways of apoptosis lead to the activation of a family of proteases, the caspases, which are responsible for the final cell demise in the so-called execution phase of apoptosis. In this review, I will first discuss the most common types of regulated cell death on a morphological basis. I will then consider in detail the molecular pathways of intrinsic and extrinsic apoptosis, discussing how they are activated in response to specific stimuli and are sometimes overlapping. In-depth knowledge of the cellular mechanisms of apoptosis is becoming more and more important not only in the field of cellular and molecular biology but also for its translational potential in several pathologies, including neurodegeneration and cancer.
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Alksere B, Kornejeva L, Grinfelde I, Dzalbs A, Enkure D, Conka U, Andersone S, Blumberga A, Nikitina-Zake L, Kangare L, Radovica-Spalvina I, Vasiljeva I, Gailite L, Erenpreiss J, Fodina V. A novel EDA variant causing X-linked hypohidrotic ectodermal dysplasia: Case report. Mol Genet Metab Rep 2021; 29:100796. [PMID: 34584847 PMCID: PMC8453221 DOI: 10.1016/j.ymgmr.2021.100796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/22/2021] [Accepted: 08/22/2021] [Indexed: 11/12/2022] Open
Abstract
Hereditary ectodermal dysplasias are a complex group of inherited disorders characterised by abnormalities in two or more ectodermal derivatives (skin, nails, sweat glands, etc.). There are two main types of these disorders – hidrotic and hypohidrotic/anhidrotic ectodermal dysplasias. Hypohidrotic ectodermal dysplasia (HED) or Christ-Siemens-Touraine syndrome (OMIM: 305100) occurs in 1 out of 5000–10,000 births [19] and has an X-linked recessive inheritance pattern (X-linked hypohydrotic ectodermal dysplasia – XLHED) [2]. The main cause of XLHED is a broad range of pathogenic variants in the EDA gene (HGNC:3157, Xq12-13) which encodes the transmembrane protein ectodysplasin-A [4]. We report here the case of a patient with a novel inherited allelic variant in the EDA gene – NM_001399.5:c.337C>T (p.Gln113*) – in the heterozygous state. Targeted family member screening was conducted and other carriers of this EDA gene pathogenic variant were identified and phenotypically characterised. The patient subsequently underwent in vitro fertilisation with preimplantation genetic testing for monogenic diseases (PGT-M).
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Affiliation(s)
- Baiba Alksere
- iVF Riga Clinic, Latvia.,Riga Stradins University, Latvia
| | | | - Ieva Grinfelde
- iVF Riga Clinic, Latvia.,Children's Clinical University Hospital, Latvia
| | - Aigars Dzalbs
- iVF Riga Clinic, Latvia.,Children's Clinical University Hospital, Latvia
| | - Dace Enkure
- iVF Riga Clinic, Latvia.,Children's Clinical University Hospital, Latvia
| | - Una Conka
- iVF Riga Clinic, Latvia.,Riga Stradins University, Latvia
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Chiarini A, Dal Prà I, Faggian G, Armato U, Luciani GB. Maladaptive remodeling of pulmonary artery root autografts after Ross procedure: A proteomic study. J Thorac Cardiovasc Surg 2020; 159:621-632.e3. [DOI: 10.1016/j.jtcvs.2019.07.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 12/15/2022]
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9
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Deleterious Variants in WNT10A, EDAR, and EDA Causing Isolated and Syndromic Tooth Agenesis: A Structural Perspective from Molecular Dynamics Simulations. Int J Mol Sci 2019; 20:ijms20215282. [PMID: 31652981 PMCID: PMC6862269 DOI: 10.3390/ijms20215282] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/18/2019] [Accepted: 10/20/2019] [Indexed: 02/07/2023] Open
Abstract
The dental abnormalities are the typical features of many ectodermal dysplasias along with congenital malformations of nails, skin, hair, and sweat glands. However, several reports of non-syndromic/isolated tooth agenesis have also been found in the literature. The characteristic features of hypohidrotic ectodermal dysplasia (HED) comprise of hypodontia/oligodontia, along with hypohidrosis/anhidrosis, and hypotrichosis. Pathogenic variants in EDA, EDAR, EDARADD, and TRAF6, cause the phenotypic expression of HED. Genetic alterations in EDA and WNT10A cause particularly non-syndromic/isolated oligodontia. In the current project, we recruited 57 patients of 17 genetic pedigrees (A-Q) from different geographic regions of the world, including Pakistan, Egypt, Saudi Arabia, and Syria. The molecular investigation of different syndromic and non-syndromic dental conditions, including hypodontia, oligodontia, generalized odontodysplasia, and dental crowding was carried out by using exome and Sanger sequencing. We have identified a novel missense variant (c.311G>A; p.Arg104His) in WNT10A in three oligodontia patients of family A, two novel sequence variants (c.207delinsTT, p.Gly70Trpfs*25 and c.1300T>G; p.Try434Gly) in EDAR in three patients of family B and four patients of family C, respectively. To better understand the structural and functional consequences of missense variants in WNT10A and EDAR on the stability of the proteins, we have performed extensive molecular dynamic (MD) simulations. We have also identified three previously reported pathogenic variants (c.1076T>C; p.Met359Thr), (c.1133C>T; p.Thr378Met) and (c.594_595insC; Gly201Argfs*39) in EDA in family D (four patients), E (two patients) and F (one patient), correspondingly. Presently, our data explain the genetic cause of 18 syndromic and non-syndromic tooth agenesis patients in six autosomal recessive and X-linked pedigrees (A-F), which expand the mutational spectrum of these unique clinical manifestations.
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10
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Chiarini A, Onorati F, Marconi M, Pasquali A, Patuzzo C, Malashicheva A, Irtyega O, Faggian G, Pignatti PF, Trabetti E, Armato U, Dal Pra I. Studies on sporadic non-syndromic thoracic aortic aneurysms: II. Alterations of extra-cellular matrix components and focal adhesion proteins. Eur J Prev Cardiol 2019; 25:51-58. [PMID: 29708036 DOI: 10.1177/2047487318759120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Background Sporadic non-syndromic thoracic aortic aneurysms (SNSTAAs) are less well understood than familial non-syndromic or syndromic ones. Here, we focused on morphologic and molecular changes of the extracellular matrix of the tunica media of SNSTAAs. Design Single centre design. Methods Surgical media samples from seven SNSTAAs and seven controls underwent quantitative polymerase chain reaction, proteomics-bioinformatics, immunoblotting, histology and immunohistochemistry analysis. Results A down-regulation of Decorin mRNA with unchanged protein levels associated with a remarkable increase of collagen fibres. A reduced and distorted network of elastic fibres partnered with an attenuated expression of microfibril-associated glycoprotein1 despite the rise of MFAP2 gene-encoded mRNA levels. An increasingly proteolysed paxillin (55 kDa PXN), a focal adhesion protein, combined with an upregulated 62 kDa PXN holoprotein, without changes in amount and phosphorylation of focal adhesion kinase (pp125FAK). The upregulation of SPOCK2-encoded Testican2 proteoglycan and of ectodysplasin (EDA) protein was coupled with a down-regulation of EDA2 receptor (EDA2R). Conclusions Several tunica media extracellular matrix-related changes favour SNSTAA development. A steady level of decorin and a microfibril-associated glycoprotein1 protein shortage cause the assembly of structurally defective collagen and elastic fibres. Up-regulation of PXN holoproteins perturbs PXN/pp125FAK interaction and focal adhesion functioning. Testican2 up-regulation suppresses the membrane-type matrix metalloproteinase inhibiting activities of other SPOCK family members thus enhancing extracellular matrix proteolysis. Finally, the altered EDA•EDA2R signalling would impact on the remodelling of SNSTAA tunica media. Altogether, our results pave the way to a deeper molecular understanding of SNSTAAs necessary to identify their early diagnostic biochemical markers.
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Affiliation(s)
- Anna Chiarini
- 1 Histology and Embryology Section, University of Verona Medical School, Italy
| | - Francesco Onorati
- 2 Department of Surgical Sciences, University of Verona Medical School, Italy
| | - Maddalena Marconi
- 1 Histology and Embryology Section, University of Verona Medical School, Italy
| | | | - Cristina Patuzzo
- 3 Biology and Genetics Section, University of Verona Medical School, Italy
| | | | - Olga Irtyega
- 4 Federal Almazov Medical Research Centre, Saint Petersburg, Russia
| | - Giuseppe Faggian
- 2 Department of Surgical Sciences, University of Verona Medical School, Italy
| | - Pier F Pignatti
- 3 Biology and Genetics Section, University of Verona Medical School, Italy
| | | | - Ubaldo Armato
- 1 Histology and Embryology Section, University of Verona Medical School, Italy
| | - Ilaria Dal Pra
- 1 Histology and Embryology Section, University of Verona Medical School, Italy
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11
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Szpak M, Xue Y, Ayub Q, Tyler‐Smith C. How well do we understand the basis of classic selective sweeps in humans? FEBS Lett 2019; 593:1431-1448. [DOI: 10.1002/1873-3468.13447] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 04/29/2019] [Accepted: 05/17/2019] [Indexed: 12/14/2022]
Affiliation(s)
| | - Yali Xue
- The Wellcome Sanger Institute Hinxton UK
| | - Qasim Ayub
- School of Science Monash University Malaysia Bandar Sunway Malaysia
- Tropical Medicine and Biology Multidisciplinary Platform Monash University Malaysia Genomics Facility Bandar Sunway Malaysia
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12
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The integration of epigenetics and genetics in nutrition research for CVD risk factors. Proc Nutr Soc 2016; 76:333-346. [DOI: 10.1017/s0029665116000823] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
There is increasing evidence documenting gene-by-environment (G × E) interactions for CVD related traits. However, the underlying mechanisms are still unclear. DNA methylation may represent one of such potential mechanisms. The objective of this review paper is to summarise the current evidence supporting the interplay among DNA methylation, genetic variants, and environmental factors, specifically (1) the association between SNP and DNA methylation; (2) the role that DNA methylation plays in G × E interactions. The current evidence supports the notion that genotype-dependent methylation may account, in part, for the mechanisms underlying observed G × E interactions in loci such asAPOE, IL6and ATP-binding cassette A1. However, these findings should be validated using intervention studies with high level of scientific evidence. The ultimate goal is to apply the knowledge and the technology generated by this research towards genetically based strategies for the development of personalised nutrition and medicine.
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13
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Wang AB, Zhang YV, Tumbar T. Gata6 promotes hair follicle progenitor cell renewal by genome maintenance during proliferation. EMBO J 2016; 36:61-78. [PMID: 27908934 DOI: 10.15252/embj.201694572] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 09/30/2016] [Accepted: 10/28/2016] [Indexed: 01/29/2023] Open
Abstract
Cell proliferation is essential to rapid tissue growth and repair, but can result in replication-associated genome damage. Here, we implicate the transcription factor Gata6 in adult mouse hair follicle regeneration where it controls the renewal of rapidly proliferating epithelial (matrix) progenitors and hence the extent of production of terminally differentiated lineages. We find that Gata6 protects against DNA damage associated with proliferation, thus preventing cell cycle arrest and apoptosis. Furthermore, we show that in vivo Gata6 stimulates EDA-receptor signaling adaptor Edaradd level and NF-κB pathway activation, known to be important for DNA damage repair and stress response in general and for hair follicle growth in particular. In cultured keratinocytes, Edaradd rescues DNA damage, cell survival, and proliferation of Gata6 knockout cells and restores MCM10 expression. Our data add to recent evidence in embryonic stem and neural progenitor cells, suggesting a model whereby developmentally regulated transcription factors protect from DNA damage associated with proliferation at key stages of rapid tissue growth. Our data may add to understanding why Gata6 is a frequent target of amplification in cancers.
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Affiliation(s)
- Alex B Wang
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
| | - Ying V Zhang
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
| | - Tudorita Tumbar
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY, USA
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14
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Li D, Xu R, Huang F, Wang B, Tao Y, Jiang Z, Li H, Yao J, Xu P, Wu X, Ren L, Zhang R, Kelsoe JR, Ma J. A novel missense mutation in collagenous domain of EDA gene in a Chinese family with X-linked hypohidrotic ectodermal dysplasia. J Genet 2016; 94:115-9. [PMID: 25846883 DOI: 10.1007/s12041-015-0474-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Daxu Li
- Stomatology Clinic, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, People's Republic of China.
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15
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Wohlfart S, Söder S, Smahi A, Schneider H. A novel missense mutation in the geneEDARADDassociated with an unusual phenotype of hypohidrotic ectodermal dysplasia. Am J Med Genet A 2015; 170A:249-53. [DOI: 10.1002/ajmg.a.37412] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 09/18/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Sigrun Wohlfart
- Department of Pediatrics; German Competence Center for Children with Ectodermal Dysplasias; University Hospital Erlangen; Erlangen Germany
| | - Stephan Söder
- Department of Pathology; University Hospital Erlangen; Erlangen Germany
| | - Asma Smahi
- Department of Genetics; INSERM U781; Hôpital Necker-Enfants Malades; Paris France
| | - Holm Schneider
- Department of Pediatrics; German Competence Center for Children with Ectodermal Dysplasias; University Hospital Erlangen; Erlangen Germany
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16
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Molecular basis of hypohidrotic ectodermal dysplasia: an update. J Appl Genet 2015; 57:51-61. [PMID: 26294279 PMCID: PMC4731439 DOI: 10.1007/s13353-015-0307-4] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 07/15/2015] [Accepted: 07/19/2015] [Indexed: 01/16/2023]
Abstract
Recent advances in understanding the molecular events underlying hypohidrotic ectodermal dysplasia (HED) caused by mutations of the genes encoding proteins of the tumor necrosis factor α (TNFα)-related signaling pathway have been presented. These proteins are involved in signal transduction from ectoderm to mesenchyme during development of the fetus and are indispensable for the differentiation of ectoderm-derived structures such as eccrine sweat glands, teeth, hair, skin, and/or nails. Novel data were reviewed and discussed on the structure and functions of the components of TNFα-related signaling pathway, the consequences of mutations of the genes encoding these proteins, and the prospect for further investigations, which might elucidate the origin of HED.
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17
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Bekaert B, Kamalandua A, Zapico SC, Van de Voorde W, Decorte R. Improved age determination of blood and teeth samples using a selected set of DNA methylation markers. Epigenetics 2015; 10:922-30. [PMID: 26280308 DOI: 10.1080/15592294.2015.1080413] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Age estimation from DNA methylation markers has seen an exponential growth of interest, not in the least from forensic scientists. The current published assays, however, can still be improved by lowering the number of markers in the assay and by providing more accurate models to predict chronological age. From the published literature we selected 4 age-associated genes (ASPA, PDE4C, ELOVL2, and EDARADD) and determined CpG methylation levels from 206 blood samples of both deceased and living individuals (age range: 0-91 years). This data was subsequently used to compare prediction accuracy with both linear and non-linear regression models. A quadratic regression model in which the methylation levels of ELOVL2 were squared showed the highest accuracy with a Mean Absolute Deviation (MAD) between chronological age and predicted age of 3.75 years and an adjusted R(2) of 0.95. No difference in accuracy was observed for samples obtained either from living and deceased individuals or between the 2 genders. In addition, 29 teeth from different individuals (age range: 19-70 years) were analyzed using the same set of markers resulting in a MAD of 4.86 years and an adjusted R(2) of 0.74. Cross validation of the results obtained from blood samples demonstrated the robustness and reproducibility of the assay. In conclusion, the set of 4 CpG DNA methylation markers is capable of producing highly accurate age predictions for blood samples from deceased and living individuals.
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Affiliation(s)
- Bram Bekaert
- a KU Leuven - University of Leuven ; Department of Imaging & Pathology ; Leuven , Belgium.,b KU-Leuven - University of Leuven; University Hospitals Leuven; Department of Forensic Medicine; Laboratory of Forensic Genetics and Molecular Archeology ; Leuven , Belgium
| | - Aubeline Kamalandua
- a KU Leuven - University of Leuven ; Department of Imaging & Pathology ; Leuven , Belgium
| | - Sara C Zapico
- c Smithsonian Institution; NMNH; MRC112 ; Anthropology Department ; Washington, DC USA
| | - Wim Van de Voorde
- a KU Leuven - University of Leuven ; Department of Imaging & Pathology ; Leuven , Belgium.,b KU-Leuven - University of Leuven; University Hospitals Leuven; Department of Forensic Medicine; Laboratory of Forensic Genetics and Molecular Archeology ; Leuven , Belgium
| | - Ronny Decorte
- a KU Leuven - University of Leuven ; Department of Imaging & Pathology ; Leuven , Belgium.,b KU-Leuven - University of Leuven; University Hospitals Leuven; Department of Forensic Medicine; Laboratory of Forensic Genetics and Molecular Archeology ; Leuven , Belgium
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18
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Johnson AA, Akman K, Calimport SRG, Wuttke D, Stolzing A, de Magalhães JP. The role of DNA methylation in aging, rejuvenation, and age-related disease. Rejuvenation Res 2013; 15:483-94. [PMID: 23098078 DOI: 10.1089/rej.2012.1324] [Citation(s) in RCA: 232] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
DNA methylation is a major control program that modulates gene expression in a plethora of organisms. Gene silencing through methylation occurs through the activity of DNA methyltransferases, enzymes that transfer a methyl group from S-adenosyl-L-methionine to the carbon 5 position of cytosine. DNA methylation patterns are established by the de novo DNA methyltransferases (DNMTs) DNMT3A and DNMT3B and are subsequently maintained by DNMT1. Aging and age-related diseases include defined changes in 5-methylcytosine content and are generally characterized by genome-wide hypomethylation and promoter-specific hypermethylation. These changes in the epigenetic landscape represent potential disease biomarkers and are thought to contribute to age-related pathologies, such as cancer, osteoarthritis, and neurodegeneration. Some diseases, such as a hereditary form of sensory neuropathy accompanied by dementia, are directly caused by methylomic changes. Epigenetic modifications, however, are reversible and are therefore a prime target for therapeutic intervention. Numerous drugs that specifically target DNMTs are being tested in ongoing clinical trials for a variety of cancers, and data from finished trials demonstrate that some, such as 5-azacytidine, may even be superior to standard care. DNMTs, demethylases, and associated partners are dynamically shaping the methylome and demonstrate great promise with regard to rejuvenation.
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Affiliation(s)
- Adiv A Johnson
- Department of Physiological Sciences, University of Arizona, Tucson, AZ, USA
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19
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Sessler T, Healy S, Samali A, Szegezdi E. Structural determinants of DISC function: new insights into death receptor-mediated apoptosis signalling. Pharmacol Ther 2013; 140:186-99. [PMID: 23845861 DOI: 10.1016/j.pharmthera.2013.06.009] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 06/14/2013] [Indexed: 12/15/2022]
Abstract
Death receptors are members of the tumour necrosis factor (TNF) receptor superfamily characterised by an ~80 amino acid long alpha-helical fold, termed the death domain (DD). Death receptors diversified during early vertebrate evolution indicating that the DD fold has plasticity and specificity that can be easily adjusted to attain additional functions. Eight members of the death receptor family have been identified in humans, which can be divided into four structurally homologous groups or clades, namely: the p75(NTR) clade (consisting of ectodysplasin A receptor, death receptor 6 (DR6) and p75 neurotrophin (NTR) receptor); the tumour necrosis factor receptor 1 clade (TNFR1 and DR3), the CD95 clade (CD95/FAS) and the TNF-related apoptosis-inducing ligand receptor (TRAILR) clade (TRAILR1 and TRAILR2). Receptors in the same clade participate in similar processes indicating that structural diversification enabled functional specialisation. On the surface of nearly all human cells multiple death receptors are expressed, enabling the cell to respond to a plethora of external signals. Activation of different death receptors converges on the activation of three main signal transduction pathways: nuclear factor-κB-mediated differentiation or inflammation, mitogen-associated protein kinase-mediated stress response and caspase-mediated apoptosis. While the ability to induce cell death is true for nearly all DRs, the FAS and TRAILR clades have specialised in inducing cell death. Here we summarise recent discoveries about the molecular regulation and structural requirements of apoptosis induction by death receptors and discuss how this information can be used to better explain the biological functions, similarities and distinguishing features of death receptors.
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Affiliation(s)
- Tamas Sessler
- Apoptosis Research Centre, National University of Ireland, Galway, Ireland
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20
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21
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Li K, McGee LR, Fisher B, Sudom A, Liu J, Rubenstein SM, Anwer MK, Cushing TD, Shin Y, Ayres M, Lee F, Eksterowicz J, Faulder P, Waszkowycz B, Plotnikova O, Farrelly E, Xiao SH, Chen G, Wang Z. Inhibiting NF-κB-inducing kinase (NIK): discovery, structure-based design, synthesis, structure-activity relationship, and co-crystal structures. Bioorg Med Chem Lett 2013; 23:1238-44. [PMID: 23374866 DOI: 10.1016/j.bmcl.2013.01.012] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 12/18/2012] [Accepted: 01/02/2013] [Indexed: 12/17/2022]
Abstract
The discovery, structure-based design, synthesis, and optimization of NIK inhibitors are described. Our work began with an HTS hit, imidazopyridinyl pyrimidinamine 1. We utilized homology modeling and conformational analysis to optimize the indole scaffold leading to the discovery of novel and potent conformationally constrained inhibitors such as compounds 25 and 28. Compounds 25 and 31 were co-crystallized with NIK kinase domain to provide structural insights.
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Affiliation(s)
- Kexue Li
- Amgen Inc., 1120 Veterans Boulevard, South San Francisco, CA 94080, USA.
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22
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García-Martín P, Hernández-Martín A, Torrelo A. Ectodermal dysplasias: a clinical and molecular review. ACTAS DERMO-SIFILIOGRAFICAS 2012; 104:451-70. [PMID: 23103118 DOI: 10.1016/j.ad.2012.07.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Revised: 07/19/2012] [Accepted: 07/20/2012] [Indexed: 01/31/2023] Open
Abstract
The ectodermal dysplasias are a large group of hereditary disorders characterized by alterations of structures of ectodermal origin. Although some syndromes can have specific features, many of them share common clinical characteristics. Two main groups of ectodermal dysplasias can be distinguished. One group is characterized by aplasia or hypoplasia of ectodermal tissues, which fail to develop and differentiate because of a lack of reciprocal signaling between ectoderm and mesoderm, the other has palmoplantar keratoderma as its most striking feature, with additional manifestations when other highly specialized epithelia are also involved. In recent decades, the genes responsible for at least 30 different types of ectodermal dysplasia have been identified, throwing light on the pathogenic mechanisms involved and their correlation with clinical findings.
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Affiliation(s)
- P García-Martín
- Servicio de Dermatología, Hospital Infantil del Niño Jesús, Madrid, Spain
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23
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Effects of an Asian-specific nonsynonymous EDAR variant on multiple dental traits. J Hum Genet 2012; 57:508-14. [DOI: 10.1038/jhg.2012.60] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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24
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Cobourne MT, Sharpe PT. Diseases of the tooth: the genetic and molecular basis of inherited anomalies affecting the dentition. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2012; 2:183-212. [DOI: 10.1002/wdev.66] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Abstract
TRADD (TNFR1-associated death domain protein) was initially identified as an adaptor molecule that transduces the signal downstream of the TNFR1 (tumor necrosis factor receptor 1). TNFR1 belongs to the so-called death receptor (DR) family of receptors that depending on the context can induce either apoptosis or proliferation, as well as NF-κB and MAP kinase activation. The receptors of this group contain death domain (DD) that is necessary for the induction of apoptosis. This review summarizes the recent advances in the field of DR signaling and in particular the role of TRADD.
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Affiliation(s)
- Yelena L Pobezinskaya
- Cell and Cancer Biology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
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26
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Vanlangenakker N, Vanden Berghe T, Vandenabeele P. Many stimuli pull the necrotic trigger, an overview. Cell Death Differ 2012; 19:75-86. [PMID: 22075985 PMCID: PMC3252835 DOI: 10.1038/cdd.2011.164] [Citation(s) in RCA: 306] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 10/17/2011] [Accepted: 10/17/2011] [Indexed: 12/13/2022] Open
Abstract
The lab of Jürg Tschopp was the first to report on the crucial role of receptor-interacting protein kinase 1 (RIPK1) in caspase-independent cell death. Because of this pioneer finding, regulated necrosis and in particular RIPK1/RIPK3 kinase-mediated necrosis, referred to as necroptosis, has become an intensively studied form of regulated cell death. Although necrosis was identified initially as a backup cell death program when apoptosis is blocked, it is now recognized as a cellular defense mechanism against viral infections and as being critically involved in ischemia-reperfusion damage. The observation that RIPK3 ablation rescues embryonic lethality in mice deficient in caspase-8 or Fas-associated-protein-via-a-death-domain demonstrates the crucial role of this apoptotic platform in the negative control of necroptosis during development. Here, we review and discuss commonalities and differences of the increasing list of inducers of regulated necrosis ranging from cytokines, pathogen-associated molecular patterns, to several forms of physicochemical cellular stress. Since the discovery of the crucial role of RIPK1 and RIPK3 in necroptosis, these kinases have become potential therapeutic targets. The availability of new pharmacological inhibitors and transgenic models will allow us to further document the important role of this form of cell death in degenerative, inflammatory and infectious diseases.
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Affiliation(s)
- N Vanlangenakker
- Department for Molecular Biomedical Research, VIB, Zwijnaarde-Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Zwijnaarde-Ghent, Belgium
| | - T Vanden Berghe
- Department for Molecular Biomedical Research, VIB, Zwijnaarde-Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Zwijnaarde-Ghent, Belgium
| | - P Vandenabeele
- Department for Molecular Biomedical Research, VIB, Zwijnaarde-Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Zwijnaarde-Ghent, Belgium
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27
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Kuramoto T, Yokoe M, Hashimoto R, Hiai H, Serikawa T. A rat model of hypohidrotic ectodermal dysplasia carries a missense mutation in the Edaradd gene. BMC Genet 2011; 12:91. [PMID: 22013926 PMCID: PMC3224228 DOI: 10.1186/1471-2156-12-91] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Accepted: 10/21/2011] [Indexed: 11/29/2022] Open
Abstract
Background Hypohidrotic ectodermal dysplasia (HED) is a congenital disorder characterized by sparse hair, oligodontia, and inability to sweat. It is caused by mutations in any of three Eda pathway genes: ectodysplasin (Eda), Eda receptor (Edar), and Edar-associated death domain (Edaradd), which encode ligand, receptor, and intracellular adaptor molecule, respectively. The Eda signaling pathway activates NF-κB, which is central to ectodermal differentiation. Although the causative genes and the molecular pathway affecting HED have been identified, no curative treatment for HED has been established. Previously, we found a rat spontaneous mutation that caused defects in hair follicles and named it sparse-and-wavy (swh). Here, we have established the swh rat as the first rat model of HED and successfully identified the swh mutation. Results The swh/swh rat showed sparse hair, abnormal morphology of teeth, and absence of sweat glands. The ectoderm-derived glands, meibomian, preputial, and tongue glands, were absent. We mapped the swh mutation to the most telomeric part of rat Chr 7 and found a Pro153Ser missense mutation in the Edaradd gene. This mutation was located in the death domain of EDARADD, which is crucial for signal transduction and resulted in failure to activate NF-κB. Conclusions These findings suggest that swh is a loss-of-function mutation in the rat Edaradd and indicate that the swh/swh rat would be an excellent animal model of HED that could be used to investigate the pathological basis of the disease and the development of new therapies.
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Affiliation(s)
- Takashi Kuramoto
- Institute of Laboratory Animals, Graduate School of Medicine, Kyoto University, Yoshidakonoe-cho, Sakyo-ku, Kyoto 606-8501, Japan.
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28
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Bocklandt S, Lin W, Sehl ME, Sánchez FJ, Sinsheimer JS, Horvath S, Vilain E. Epigenetic predictor of age. PLoS One 2011; 6:e14821. [PMID: 21731603 PMCID: PMC3120753 DOI: 10.1371/journal.pone.0014821] [Citation(s) in RCA: 604] [Impact Index Per Article: 46.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 05/11/2011] [Indexed: 12/20/2022] Open
Abstract
From the moment of conception, we begin to age. A decay of cellular structures, gene regulation, and DNA sequence ages cells and organisms. DNA methylation patterns change with increasing age and contribute to age related disease. Here we identify 88 sites in or near 80 genes for which the degree of cytosine methylation is significantly correlated with age in saliva of 34 male identical twin pairs between 21 and 55 years of age. Furthermore, we validated sites in the promoters of three genes and replicated our results in a general population sample of 31 males and 29 females between 18 and 70 years of age. The methylation of three sites—in the promoters of the EDARADD, TOM1L1, and NPTX2 genes—is linear with age over a range of five decades. Using just two cytosines from these loci, we built a regression model that explained 73% of the variance in age, and is able to predict the age of an individual with an average accuracy of 5.2 years. In forensic science, such a model could estimate the age of a person, based on a biological sample alone. Furthermore, a measurement of relevant sites in the genome could be a tool in routine medical screening to predict the risk of age-related diseases and to tailor interventions based on the epigenetic bio-age instead of the chronological age.
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Affiliation(s)
- Sven Bocklandt
- Department of Human Genetics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Wen Lin
- Department of Biostatistics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Mary E. Sehl
- Department of Medicine, University of California Los Angeles, Los Angeles, California, United States of America
| | - Francisco J. Sánchez
- Department of Human Genetics, University of California Los Angeles, Los Angeles, California, United States of America
- Center for Society and Genetics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Janet S. Sinsheimer
- Department of Human Genetics, University of California Los Angeles, Los Angeles, California, United States of America
- Department of Biostatistics, University of California Los Angeles, Los Angeles, California, United States of America
- Department of Biomathematics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Steve Horvath
- Department of Human Genetics, University of California Los Angeles, Los Angeles, California, United States of America
- Department of Biostatistics, University of California Los Angeles, Los Angeles, California, United States of America
| | - Eric Vilain
- Department of Human Genetics, University of California Los Angeles, Los Angeles, California, United States of America
- Center for Society and Genetics, University of California Los Angeles, Los Angeles, California, United States of America
- * E-mail:
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29
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Keratinocyte-specific ablation of the NF-κB regulatory protein A20 (TNFAIP3) reveals a role in the control of epidermal homeostasis. Cell Death Differ 2011; 18:1845-53. [PMID: 21566665 DOI: 10.1038/cdd.2011.55] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The ubiquitin-editing enzyme A20 (tumor necrosis factor-α-induced protein 3) serves as a critical brake on nuclear factor κB (NF-κB) signaling. In humans, polymorphisms in or near the A20 gene are associated with several inflammatory disorders, including psoriasis. We show here that epidermis-specific A20-knockout mice (A20(EKO)) develop keratinocyte hyperproliferation, but no signs of skin inflammation, such as immune cell infiltration. However, A20(EKO) mice clearly developed ectodermal organ abnormalities, including disheveled hair, longer nails and sebocyte hyperplasia. This phenotype resembles that of mice overexpressing ectodysplasin-A1 (EDA-A1) or the ectodysplasin receptor (EDAR), suggesting that A20 negatively controls EDAR signaling. We found that A20 inhibited EDAR-induced NF-κB signaling independent from its de-ubiquitinating activity. In addition, A20 expression was induced by EDA-A1 in embryonic skin explants, in which its expression was confined to the hair placodes, known to be the site of EDAR expression. In summary, our data indicate that EDAR-induced NF-κB levels are controlled by A20, which functions as a negative feedback regulator, to assure proper skin homeostasis and epidermal appendage development.
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30
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Atukorala A, Inohaya K, Baba O, Tabata MJ, Ratnayake R, Abduweli D, Kasugai S, Mitani H, Takano Y. Scale and tooth phenotypes in medaka with a mutated ectodysplasin-A receptor: implications for the evolutionary origin of oral and pharyngeal teeth. ACTA ACUST UNITED AC 2011; 73:139-48. [DOI: 10.1679/aohc.73.139] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- A.D.S. Atukorala
- Section of Biostructural Science, Graduate School of Tokyo Medical and Dental University
- International Research Center for Molecular Science in Tooth and Bone Diseases, Global COE, Tokyo Medical and Dental University
| | - Keiji Inohaya
- Department of Biological Information, Tokyo Institute of Technology
| | - Otto Baba
- Section of Biostructural Science, Graduate School of Tokyo Medical and Dental University
| | - Makoto J. Tabata
- Section of Biostructural Science, Graduate School of Tokyo Medical and Dental University
| | - R.A.R.K Ratnayake
- Section of Biostructural Science, Graduate School of Tokyo Medical and Dental University
| | - Dawud Abduweli
- Section of Biostructural Science, Graduate School of Tokyo Medical and Dental University
- International Research Center for Molecular Science in Tooth and Bone Diseases, Global COE, Tokyo Medical and Dental University
| | - Shohei Kasugai
- International Research Center for Molecular Science in Tooth and Bone Diseases, Global COE, Tokyo Medical and Dental University
- Section of Oral Implantology and Regenerative Dental Medicine, Graduate School of Tokyo Medical and Dental University
| | - Hiroshi Mitani
- Department of Biological Sciences, Graduate School of Frontier Sciences, University of Tokyo
| | - Yoshiro Takano
- Section of Biostructural Science, Graduate School of Tokyo Medical and Dental University
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Suda N, Bazar A, Bold O, Jigjid B, Garidkhuu A, Ganburged G, Moriyama K. A Mongolian patient with hypohidrotic ectodermal dysplasia with a novel P121S variant in EDARADD. Orthod Craniofac Res 2010; 13:114-7. [PMID: 20477971 DOI: 10.1111/j.1601-6343.2010.01484.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
INTRODUCTION Hypohidrotic ectodermal dysplasia is a genetic disorder characterized by diminished or a lack of sweating, congenital missing teeth, and sparse or absent hair. Three genes, EDA, EDAR, and EDARADD, all related to tumor necrosis factor signaling, have been reported as responsible genes for this disorder. Among them, the largest numbers of mutations have been identified in EDA, and only two mutations identified in EDARADD. MATERIALS AND METHODS DNA analysis of EDA, EDAR, and EDARADD was performed on a Mongolian patient by polymerase chain reaction-direct sequencing. RESULTS The 5-year-old Mongolian individual had no erupted deciduous or permanent teeth. A panoramic radiograph showed only one tooth in the right mandible. His hair and eyebrows were sparse, but he did not have a short stature. He showed diminished sweating. The nails of his fingers and toes were normal. Based on these conditions, he was diagnosed with hypohidrotic ectodermal dysplasia. There was no gene mutation of EDA or EDAR. A novel heterozygous variant (P121S; c.361C>T) was identified in the death domain of EDARADD (NM_080738). No other member of his family was affected, and this variant was not identified in his parents or maternal grandparents. CONCLUSION This study reports an individual affected with hypohidrotic ectodermal dysplasia with a novel heterozygous P121S variant in the death domain of EDARADD.
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Affiliation(s)
- N Suda
- Maxillofacial Orthognathics, Division of Maxillofacial/Neck Reconstruction, Department of Maxillofacial Reconstruction and Function, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo, Japan.
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Faherty CS, Merrell DS, Semino-Mora C, Dubois A, Ramaswamy AV, Maurelli AT. Microarray analysis of Shigella flexneri-infected epithelial cells identifies host factors important for apoptosis inhibition. BMC Genomics 2010; 11:272. [PMID: 20429941 PMCID: PMC2996966 DOI: 10.1186/1471-2164-11-272] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Accepted: 04/29/2010] [Indexed: 01/05/2023] Open
Abstract
Background Shigella flexneri inhibits apoptosis in infected epithelial cells. In order to understand the pro-survival effects induced by the bacteria, we utilized apoptosis-specific microarrays to analyze the changes in eukaryotic gene expression in both infected and uninfected cells in the presence and absence of staurosporine, a chemical inducer of the intrinsic pathway of apoptosis. The goal of this research was to identify host factors that contribute to apoptosis inhibition in infected cells. Results The microarray analysis revealed distinct expression profiles in uninfected and infected cells, and these changes were altered in the presence of staurosporine. These profiles allowed us to make comparisons between the treatment groups. Compared to uninfected cells, Shigella-infected epithelial cells, both in the presence and absence of staurosporine, showed significant induced expression of JUN, several members of the inhibitor of apoptosis gene family, nuclear factor κB and related genes, genes involving tumor protein 53 and the retinoblastoma protein, and surprisingly, genes important for the inhibition of the extrinsic pathway of apoptosis. We confirmed the microarray results for a selection of genes using in situ hybridization analysis. Conclusion Infection of epithelial cells with S. flexneri induces a pro-survival state in the cell that results in apoptosis inhibition in the presence and absence of staurosporine. The bacteria may target these host factors directly while some induced genes may represent downstream effects due to the presence of the bacteria. Our results indicate that the bacteria block apoptosis at multiple checkpoints along both pathways so that even if a cell fails to prevent apoptosis at an early step, Shigella will block apoptosis at the level of caspase-3. Apoptosis inhibition is most likely vital to the survival of the bacteria in vivo. Future characterization of these host factors is required to fully understand how S. flexneri inhibits apoptosis in epithelial cells.
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Affiliation(s)
- Christina S Faherty
- Department of Microbiology and Immunology, F, Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
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Priolo M. Ectodermal dysplasias: an overview and update of clinical and molecular-functional mechanisms. Am J Med Genet A 2010; 149A:2003-13. [PMID: 19504607 DOI: 10.1002/ajmg.a.32804] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The ectodermal dysplasias (EDs) are a large and complex group of disorders. In various combinations, they all share anomalies in hair, teeth, nails, and sweat gland function. The anomalies affecting the epidermis and epidermal appendages are extremely variable. Many are associated with malformations in other organs and systems. Clinical overlap is present among EDs. Few causative genes have been identified, to date. Most of the EDs present multisystem involvement with abnormal development of structures also derived from mesoderm. In the last few years, it has become evident that gene expression in the EDs is not limited to the ectoderm and that there is a concomitant effect on developing mesenchymal structures, with modification or abolition of ectodermal-mesenchymal signaling. It is possible to approach this group of diseases basing on functional and molecular findings and to begin to explain the complex clinical consequences of mutations affecting specific developmental pathways. We have reviewed the molecular basis of ectodermal dysplasias applying this new clinical-functional classification. For each subset of the identified ED, we will now describe the genes and related proteins involved in terms of: (1) structure of the genes and their role in differentiation of the epidermis and the ectodermal derivatives; (2) genotype-phenotype correlation.
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Affiliation(s)
- Manuela Priolo
- Operative Unit of Medical Genetics Bianchi-Melacrino-Morelli Hospital, Reggio Calabria, Italy.
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Abstract
Hypohidrotic (anhidrotic) ectodermal dysplasia (HED) is a congenital syndrome characterized by sparse hair, oligodontia, and reduced sweating. It is caused by mutations in any of the three Eda pathway genes: ectodysplasin (Eda), Edar, and Edaradd which encode a ligand, a receptor, and an intracellular signal mediator of a single linear pathway, respectively. In rare cases, HED is associated with immune deficiency caused by mutations in further downstream components of the Eda pathway that are necessary for the activation of the transcription factor NF-kappaB. Here I present a brief research update on the molecular aspects of this evolutionarily conserved pathway. The developmental role of Eda will be discussed in light of loss- and gain-of-function mouse models with emphasis on the past few years.
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Affiliation(s)
- Marja L Mikkola
- Developmental Biology Program, Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland.
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Abstract
The IKK kinase complex is the core element of the NF-κB cascade. It is essentially made of two kinases (IKKα and IKKβ) and a regulatory subunit, NEMO/IKKγ. Additional components may exist, transiently or permanently, but their characterization is still uncertain. In this review, we will focus on the NEMO molecule, and describe the results which have been obtained, and the hypotheses which have been proposed, to explain how NEMO controls the activation of the IKK complex. NEMO is one of the very few non-redundant components of the NF-κB cascade, and the localization of the gene that encodes it on the X chromosome suggests it is likely to be the target of mutations leading to pathologies: this is indeed the case, and we will also present the current status of our knowledge regarding NEMO-associated pathologies.
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Andera L. Signaling activated by the death receptors of the TNFR family. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2009; 153:173-80. [PMID: 19851428 DOI: 10.5507/bp.2009.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The fine balance in cellular life and death is affected by a number of tightly regulated, direct signals that can help to turn the balance either in favor of or against the ultimate fate. Among the most prominent players in the field of the extracellular signals leading to cell death, preferentially through induction of apoptosis belong several receptors from so-called Death Receptors group of the Tumour Necrosis Factors Receptors (TNFR) family. METHODS AND RESULTS Over 15 years of the research on activation and regulation of the most prominent member of this group - receptors for the ligands TRAIL, FasL and TNFalpha brought not only a detail (and still refining) mechanism of these receptors activation and downstream signaling, but also connected them with the ultimate apoptotic gatekeeper - mitochondria. Mitochondria are, in addition to their essential role as the energy factories also repositories of a cavalry of apoptosis-inducing as well as regulatory proteins. However, in addition to the pro-death signaling, these receptors were also shown under certain circumstances to activate an opposite, pro-proliferative signaling as well as to participate in pro-inflammatory responses. CONCLUSIONS Thus despite the concerned effort of a number of groups and thousands of published papers, novel roles for the intriguing group of these receptors and their ligands and fine tuning of their signaling still await to be uncovered. This cut-through review will be mainly focused on the prominent death-inducing members of this group - TNFR1, Fas/CD95 and TRAIL receptors.
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Affiliation(s)
- Ladislav Andera
- Institute of Molecular Genetics AS CR, Videnska, Prague, Czech Republic.
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Duverger O, Morasso MI. Epidermal patterning and induction of different hair types during mouse embryonic development. BIRTH DEFECTS RESEARCH. PART C, EMBRYO TODAY : REVIEWS 2009; 87:263-72. [PMID: 19750518 PMCID: PMC2995294 DOI: 10.1002/bdrc.20158] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An intriguing question in developmental biology is how epidermal pattern formation processes are established and what are the molecular mechanisms involved in these events. The establishment of the pattern is concomitant with the formation of ectodermal appendages, which involves complex interactions between the epithelium and the underlying mesenchyme. Among ectodermal appendages, hair follicles are the "mini organs" that produce hair shafts. Several developmental and structural features are common to all hair follicles and to the hair shaft they produce. However, many different hair types are produced in a single organism. Also, different characteristics can be observed depending on the part of the body where the hair follicle is formed. Here, we review the mechanisms involved in the patterning of different hair types during mouse embryonic development as well as the influence of the body axes on hair patterning.
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Affiliation(s)
- Olivier Duverger
- Developmental Skin Biology Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, NIH, Bethesda, Maryland, USA
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Ulvmar MH, Sur I, Mémet S, Toftgård R. Timed NF-kappaB inhibition in skin reveals dual independent effects on development of HED/EDA and chronic inflammation. J Invest Dermatol 2009; 129:2584-93. [PMID: 19516260 DOI: 10.1038/jid.2009.126] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We have shown earlier that inhibiting NF-kappaB activity in murine basal keratinocytes leads to hyperproliferation, inflammation, and cancer in a tumor necrosis factor receptor 1 (TNFR1)-dependent manner. We report here the outcomes of NF-kappaB abrogation at different stages of epidermal morphogenesis using a conditional IkappaBalpha transgenic mouse model. We find that blocking NF-kappaB during embryogenesis mimics the epidermal and glandular defects seen in the human disease hypohidrotic/anhidrotic ectodermal dysplasia (HED/EDA), independently of the inflammatory phenotype and TNFR1. The onset of transgene expression after birth correlates with nuclear exclusion of the NF-kappaB p50 subunit, hyperplasia, and development of a chronic inflammation initiated and dominated by macrophages. In this model, macrophages are important producers of the vascular endothelial growth factor A (VEGFA), whose inhibition attenuates the excessive angiogenesis otherwise observed. The inflammatory reaction requires the continuous suppression of NF-kappaB in keratinocytes, indicating that an immune cell attractant(s) is directly induced in response to NF-kappaB inhibition. As TNFalpha upregulation is a late event in this model, good candidates for such chemoattraction are the monocyte chemotactic proteins 1, 2, and 3 (MCP-1-2-3), which are upregulated in the epidermal compartment concomitantly with the onset of NF-kappaB inhibition.
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Affiliation(s)
- Maria H Ulvmar
- Department of Bioscience and Nutrition, Karolinska Institutet, Huddinge, Sweden
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Abstract
The skin is the largest organ of the body and protects the organism against external physical, chemical and biological insults, such as wounding, ultraviolet radiation and micro-organisms. The epidermis is the upper part of the skin that is continuously renewed. The keratinocytes are the major cell type in the epidermis and undergo a specialized form of programmed cell death, called cornification, which is different from classical apoptosis. In keep with this view, several lines of evidence indicate that NF-kB is an important factor providing protection against keratinocyte apoptosis in homeostatic and inflammatory conditions. In contrast, the hair follicle is an epidermal appendage that shows cyclic apoptosis-driven involution, as part of the normal hair cycle. The different cell death programs need to be well orchestrated to maintain skin homeostasis. One of the major environmental insults to the skin is UVB radiation, causing the occurrence of apoptotic sunburn cells. Deregulation of cell death mechanisms in the skin can lead to diseases such as cancer, necrolysis and graft-versus-host disease. Here we review the apoptotic and the anti-apoptotic mechanisms in skin homeostasis and disease.
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Gunadi, Miura K, Ohta M, Sugano A, Lee MJ, Sato Y, Matsunaga A, Hayashi K, Horikawa T, Miki K, Wataya-Kaneda M, Katayama I, Nishigori C, Matsuo M, Takaoka Y, Nishio H. Two novel mutations in the ED1 gene in Japanese families with X-linked hypohidrotic ectodermal dysplasia. Pediatr Res 2009; 65:453-7. [PMID: 19127222 DOI: 10.1203/pdr.0b013e3181991229] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
X-linked hypohidrotic ectodermal dysplasia (XLHED), which is characterized by hypodontia, hypotrichosis, and hypohidrosis, is caused by mutations in ED1, the gene encoding ectodysplasin-A (EDA). This protein belongs to the tumor necrosis factor ligand superfamily. We analyzed ED1 in two Japanese patients with XLHED. In patient 1, we identified a 4-nucleotide insertion, c.119-120insTGTG, in exon 1, which led to a frameshift mutation starting from that point (p.L40fsX100). The patient's mother was heterozygous for this mutation. In patient 2, we identified a novel missense mutation, c.1141G>C, in exon 9, which led to a substitution of glycine with arginine in the TNFL domain of EDA (p.G381R). This patient's mother and siblings showed neither symptoms nor ED1 mutations, so this mutation was believed to be a de novo mutation in maternal germline cells. According to molecular simulation analysis of protein structure and electrostatic surface, p.G381R increases the distance between K375 in monomer A and K327 in monomer B, which suggests an alteration of overall structure of EDA. Thus, we identified two novel mutations, p.L40fsX100 and p.G381R, in ED1 of two XLHED patients. Simulation analysis suggested that the p.G381R mutation hampers binding of EDA to its receptor via alteration of overall EDA structure.
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Affiliation(s)
- Gunadi
- Department of Genetic Epidemiology, Kobe University Graduate School of Medicine, Kobe 650-0017, Japan
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Abstract
The role of the transcription factor NF-kappa B, particularly its coupling to inflammation and cancer, has generated considerable interest in recent years. NF-kappa B in the skin is crucial for morphogenesis and homeostasis. Perturbations in its activity are linked to developmental skin defects, inflammatory skin disease, and skin cancer. However, the most striking aspect of NF-kappa B function in the skin is its two-faced behavior--both activation and inhibition of the pathway causes inflammation. In this review, we focus on the role of NF-kappa B in the skin and summarize the current knowledge in the field arising from animal models as well as human disease studies.
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Affiliation(s)
- Inderpreet Sur
- Department of Bioscience and Nutrition, Karolinska Institute, Huddinge, Sweden
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Pispa J, Pummila M, Barker PA, Thesleff I, Mikkola ML. Edar and Troy signalling pathways act redundantly to regulate initiation of hair follicle development. Hum Mol Genet 2008; 17:3380-91. [DOI: 10.1093/hmg/ddn232] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Bryk J, Hardouin E, Pugach I, Hughes D, Strotmann R, Stoneking M, Myles S. Positive selection in East Asians for an EDAR allele that enhances NF-kappaB activation. PLoS One 2008; 3:e2209. [PMID: 18493316 PMCID: PMC2374902 DOI: 10.1371/journal.pone.0002209] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2008] [Accepted: 04/07/2008] [Indexed: 12/18/2022] Open
Abstract
Genome-wide scans for positive selection in humans provide a promising approach to establish links between genetic variants and adaptive phenotypes. From this approach, lists of hundreds of candidate genomic regions for positive selection have been assembled. These candidate regions are expected to contain variants that contribute to adaptive phenotypes, but few of these regions have been associated with phenotypic effects. Here we present evidence that a derived nonsynonymous substitution (370A) in EDAR, a gene involved in ectodermal development, was driven to high frequency in East Asia by positive selection prior to 10,000 years ago. With an in vitro transfection assay, we demonstrate that 370A enhances NF-kappaB activity. Our results suggest that 370A is a positively selected functional genetic variant that underlies an adaptive human phenotype.
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Affiliation(s)
- Jarosław Bryk
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Emilie Hardouin
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Irina Pugach
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - David Hughes
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Rainer Strotmann
- Institute of Biochemistry, Molecular Biochemistry, Medical Faculty, University of Leipzig, Leipzig, Germany
| | - Mark Stoneking
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| | - Sean Myles
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
- * E-mail:
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Fan Y, Dutta J, Gupta N, Fan G, Gélinas C. Regulation of programmed cell death by NF-kappaB and its role in tumorigenesis and therapy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2008; 615:223-50. [PMID: 18437897 DOI: 10.1007/978-1-4020-6554-5_11] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The Rel/NF-kappaB transcription factors are key regulators of programmed cell death (PCD). Their activity has significant physiological relevance for normal development and homeostasis in various tissues and important pathological consequences are associated with aberrant NF-kappaB activity, including hepatocyte apoptosis, neurodegeneration, and cancer. While NF-kappaB is best characterized for its protective activity in response to proapoptotic stimuli, its role in suppressing programmed necrosis has come to light more recently. NF-kappaB most commonly antagonizes PCD by activating the expression of antiapoptotic proteins and antioxidant molecules, but it can also promote PCD under certain conditions and in certain cell types. It is therefore important to understand the pathways that control NF-kappaB activation in different settings and the mechanisms that regulate its anti- vs pro-death activities. Here, we review the role of NF-kappaB in apoptotic and necrotic PCD, the mechanisms involved, and how its activity in the cell death response impacts cancer development, progression, and therapy. Given the role that NF-kappaB plays both in tumor cells and in the tumor microenvironment, recent findings underscore the NF-kappaB signaling pathway as a promising target for cancer prevention and treatment.
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Affiliation(s)
- Yongjun Fan
- Center for Advanced Biotechnology and Medicine, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, Piscataway, NJ 08854-5638, USA
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Pantalacci S, Chaumot A, Benoît G, Sadier A, Delsuc F, Douzery EJP, Laudet V. Conserved features and evolutionary shifts of the EDA signaling pathway involved in vertebrate skin appendage development. Mol Biol Evol 2008; 25:912-28. [PMID: 18304980 DOI: 10.1093/molbev/msn038] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
It is widely accepted that evolutionary changes in conserved developmental signaling pathways play an important role in morphological evolution. However, few in silico studies were interested in tracking such changes in a signaling pathway. The Ectodysplasin (EDA) pathway provides an opportunity to fill this gap because it is involved in vertebrate skin appendage development such as scales, teeth, hair, and feathers that take an obvious part in the adaptation of species to their environment. We benefited from the large amount of genomic data now available to explore the evolution of the upstream genes of the EDA pathway. In mammals, these genes are eda (encoding 2 ligands, EDA-A1 and EDA-A2), edar (EDA-A1 receptor), edaradd (EDA receptor [EDAR] adapter), xedar (EDA-A2 receptor), and troy (a XEDAR-related receptor). We show that the evolution of EDA pathway genes combines both strongly conserved features and evolutionary shifts. These shifts are found at different signaling levels (from the ligand to intracellular signaling) and at different taxonomic levels (class, suborder, and genera). Although conserved features likely participate to the similarities found in the early development of vertebrate skin appendages, these shifts might account for innovations and specializations. Moreover, our study demonstrates that we can now benefit from the large number of sequenced vertebrate genomes to explore the evolution of specific signaling pathways and thereby to open new perspectives for developmental biology and evolutionary developmental biology.
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Affiliation(s)
- Sophie Pantalacci
- Molecular Zoology Team, Institut de Génomique Fonctionnelle de Lyon, Université de Lyon, Institut Fédératif Biosciences 128 Gerland Lyon Sud, CNRS, INRA, Université Claude Bernard Lyon 1, 69364 Lyon cedex 07, France
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Zhang YD, Chen Z, Song YQ, Liu C, Chen YP. Making a tooth: growth factors, transcription factors, and stem cells. Cell Res 2007; 15:301-16. [PMID: 15916718 DOI: 10.1038/sj.cr.7290299] [Citation(s) in RCA: 204] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Mammalian tooth development is largely dependent on sequential and reciprocal epithelial-mesenchymal interactions. These processes involve a series of inductive and permissive interactions that result in the determination, differentiation, and organization of odontogenic tissues. Multiple signaling molecules, including BMPs, FGFs, Shh, and Wnt proteins, have been implicated in mediating these tissue interactions. Transcription factors participate in epithelial-mesenchymal interactions via linking the signaling loops between tissue layers by responding to inductive signals and regulating the expression of other signaling molecules. Adult stem cells are highly plastic and multipotent. These cells including dental pulp stem cells and bone marrow stromal cells could be reprogrammed into odontogenic fate and participated in tooth formation. Recent progress in the studies of molecular basis of tooth development, adult stem cell biology, and regeneration will provide fundamental knowledge for the realization of human tooth regeneration in the near future.
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Knecht AK, Hosemann KE, Kingsley DM. Constraints on utilization of the EDA-signaling pathway in threespine stickleback evolution. Evol Dev 2007; 9:141-54. [PMID: 17371397 DOI: 10.1111/j.1525-142x.2007.00145.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Many traits evolve in parallel in widely separated populations. The evolutionary radiation of threespine sticklebacks provides a powerful model for testing the molecular basis of parallel evolution in vertebrates. Although marine sticklebacks are completely covered with bony armor plates, most freshwater populations have dramatic reductions in plates. Recent genetic studies have shown that major changes in armor patterning are likely due to regulatory alterations in the gene encoding the secreted signaling molecule ectodysplasin (EDA). In mammals, mutations in many different components of the EDA-signaling pathway produce similar changes in hair, teeth, sweat glands, and dermal bones. To test whether other genes in the EDA pathway also control natural variation in armor plates, we identified and mapped stickleback EDA Receptor (EDAR), the EDAR-Associated Death Domain adaptor, Tumor Necrosis Factor Receptor (TNFR) SuperFamily member 19, its adaptor TNFR-Associated Factor 6, and the downstream regulator nuclear factor kappa B Essential Modulator (NEMO). In contrast to the diversity of genes underlying ectodermal dysplasia disease phenotypes in humans, none of these EDA pathway components map to chromosomes previously shown to modify armor plates in natural populations, though EDAR showed a small but significant effect on plate number. We further investigated whether these genes exhibit differences in copy number, target size, or genomic organization that might make them less suitable targets for evolutionary change. In comparison with EDA, all these genes have smaller surrounding noncoding (putative regulatory) regions, with fewer evolutionarily conserved regions. We suggest that the presence of highly modular cis-acting control sequences may be a key factor influencing the likelihood that particular genes will serve as the basis of major phenotypic changes in nature.
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Affiliation(s)
- Anne K Knecht
- Department of Developmental Biology and, Stanford University School of Medicine, Stanford, CA 94305-5329, USA
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Bal E, Baala L, Cluzeau C, El Kerch F, Ouldim K, Hadj-Rabia S, Bodemer C, Munnich A, Courtois G, Sefiani A, Smahi A. Autosomal dominant anhidrotic ectodermal dysplasias at the EDARADD locus. Hum Mutat 2007; 28:703-9. [PMID: 17354266 DOI: 10.1002/humu.20500] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Anhidrotic ectodermal dysplasia (EDA) is a disorder of ectodermal differentiation characterized by sparse hair, abnormal or missing teeth, and inability to sweat. X-linked EDA is the most common form, caused by mutations in the EDA gene, which encodes ectodysplasin, a member of the tumor necrosis factor (TNF) family. Autosomal dominant and recessive forms of EDA have been also described and are accounted for by two genes. Mutations in EDAR, encoding a TNF receptor (EDAR) cause both dominant and recessive forms. In addition, mutations in a recently identified gene, EDARADD, encoding EDAR-associated death domain (EDARADD) have been shown to cause autosomal recessive EDA. Here, we report a large Moroccan family with an autosomal dominant EDA. We mapped the disease gene to chromosome 1q42.2-q43, and identified a novel missense mutation in the EDARADD gene (c.335T>G, p.Leu112Arg). Thus, the EDARADD gene accounts for both recessive and dominant EDA. EDAR is activated by its ligand, ectodysplasin, and uses EDARADD to build an intracellular complex and activate nuclear factor kappa B (NF-kB). We compared the functional consequences of the dominant (p.Leu112Arg) and recessive mutation (p.Glu142Lys), which both occurred in the death domain (DD) of EDARADD. We demonstrated that the p.Leu112Arg mutation completely abrogated NF-kB activation, whereas the p.Glu142Lys retained the ability to significantly activate the NF-kB pathway. The p.Leu112Arg mutation is probably a dominant negative form as its cotransfection impaired the wild-type EDARADD's ability to activate NF-kB. Our results confirm that NF-kB activation is impaired in EDA and support the role of EDARADD DD as a downstream effector of EDAR signaling.
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Affiliation(s)
- E Bal
- INSERM U781 et Département de Génétique, Hôpital Necker-Enfants Malades, Paris, France
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Drew CF, Lin CM, Jiang TX, Blunt G, Mou C, Chuong CM, Headon DJ. The Edar subfamily in feather placode formation. Dev Biol 2007; 305:232-45. [PMID: 17362907 PMCID: PMC2696204 DOI: 10.1016/j.ydbio.2007.02.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2006] [Revised: 01/17/2007] [Accepted: 02/09/2007] [Indexed: 12/24/2022]
Abstract
A subgroup of the TNF receptor family, composed of Edar, Troy and Xedar, are implicated in the development of ectodermal appendages, such as hair follicles, teeth and sweat glands. We have isolated chicken orthologues of these three receptors and analysed their roles in early feather development. Conservation of protein sequences between mammalian and avian proteins is variable, with avian Edar showing the greatest degree of sequence identity. cXedar differs from its mammalian orthologue in that it contains an intracellular death domain. All three receptors are expressed during early feather morphogenesis and dominant negative forms of each receptor impair the epithelial contribution to feather bud morphogenesis, while the dermal contribution appears unaffected. Hyperactivation of each receptor leads to more widespread assumption of placode fate, though in different regions of the skin. Receptor signaling converges on NF-kappaB, and inhibiting this transcription factor alters feather bud number and size in a stage-specific manner. Our findings illustrate the roles of these three receptors during avian skin morphogenesis and also suggest that activators of feather placode fate undergo mutual regulation to reach a decision on skin appendage location and size.
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Affiliation(s)
- Caroline F. Drew
- Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Chih Min Lin
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Ting Xin Jiang
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Geoff Blunt
- Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Chunyan Mou
- Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Cheng Ming Chuong
- Department of Pathology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Denis J. Headon
- Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
- Corresponding author. E-mail address: , Phone: +44 161 2751534
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Grivennikov SI, Kuprash DV, Liu ZG, Nedospasov SA. Intracellular signals and events activated by cytokines of the tumor necrosis factor superfamily: From simple paradigms to complex mechanisms. ACTA ACUST UNITED AC 2007; 252:129-61. [PMID: 16984817 DOI: 10.1016/s0074-7696(06)52002-9] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Tumor necrosis factor (TNF) and several related cytokines can induce opposite effects such as cell activation and proliferation or cell death. How the cell maintains the balance between these seemingly mutually exclusive pathways has long remained a mystery. TNF receptor I (TNFRI) initially emerged as a potent activator of NFkappaB and AP-1 transcription factors, while the related CD95 (Fas, Apo-1) was recognized as a prototype death receptor. Advances in research have uncovered critical molecular players in these intracellular processes. They have also revealed a much more complex picture than originally thought. Several new signaling pathways, including the alternative NFkappaB activation cascade, have been uncovered, and previously unknown modes of cross-talk between intracellular signaling molecules were revealed. It also turned out that signaling mechanisms mediated by the TNF receptor superfamily members can operate not only in the immune system but also in organ development.
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Affiliation(s)
- Sergei I Grivennikov
- Laboratory of Molecular Immunology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, 119991 Moscow, Russia
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