1
|
Ennouri M, Zimmer AD, Bahloul E, Chaabouni R, Marrakchi S, Turki H, Fakhfakh F, Bougacha-Elleuch N, Fischer J. Clinical and genetic investigation of ichthyosis in familial and sporadic cases in south of Tunisia: genotype-phenotype correlation. BMC Med Genomics 2022; 15:4. [PMID: 34983512 PMCID: PMC8729015 DOI: 10.1186/s12920-021-01154-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 12/31/2021] [Indexed: 12/30/2022] Open
Abstract
Background Ichthyosis is a heterogeneous group of Mendelian cornification disorders that includes syndromic and non-syndromic forms. Autosomal Recessive Congenital Ichthyosis (ARCI) and Ichthyosis Linearis Circumflexa (ILC) belong to non-syndromic forms. Syndromic ichthyosis is rather a large group of heterogeneous diseases. Overlapping phenotypes and genotypes between these disorders is a major characteristic. Therefore, determining the specific genetic background for each form would be necessary.
Methods A total of 11 Tunisian patients with non-syndromic (8 with ARCI and 2 with ILC) and autosomal syndromic ichthyosis (1 patient) were screened by a custom Agilent HaloPlex multi-gene panel and the segregation of causative mutations were analyzed in available family members. Results Clinical and molecular characterization, leading to genotype–phenotype correlation in 11 Tunisian patients was carried out. Overall, we identified 8 mutations in 5 genes. Thus, in patients with ARCI, we identified a novel (c.118T > C in NIPAL4) and 4 already reported mutations (c.534A > C in NIPAL4; c.788G > A and c.1042C > T in TGM1 and c.844C > T in CYP4F22). Yellowish severe keratoderma was found to be associated with NIPAL4 variations and brachydactyly to TGM1 mutations. Two novel variations (c.5898G > C and c.2855A > G in ABCA12) seemed to be features of ILC. Delexon13 in CERS3 was reported in a patient with syndromic ichthyosis. Conclusions Our study further extends the spectrum of mutations involved in ichthyosis as well as clinical features that could help directing genetic investigation.
Collapse
Affiliation(s)
- Mariem Ennouri
- Laboratory of Molecular and Functional Genetics, Faculty of Sciences of Sfax, Sfax University, Sfax University, Street of Soukra km 4, BP 1171-3000, Sfax, Tunisia.
| | - Andreas D Zimmer
- Faculty of Medicine, Institute of Human Genetics, Medical Center, University of Freiburg, Freiburg, Germany
| | - Emna Bahloul
- Department of Dermatology, CHU Hedi Chaker, Sfax University, Sfax, Tunisia
| | - Rim Chaabouni
- Department of Dermatology, CHU Hedi Chaker, Sfax University, Sfax, Tunisia
| | | | - Hamida Turki
- Department of Dermatology, CHU Hedi Chaker, Sfax University, Sfax, Tunisia
| | - Faiza Fakhfakh
- Laboratory of Molecular and Functional Genetics, Faculty of Sciences of Sfax, Sfax University, Sfax University, Street of Soukra km 4, BP 1171-3000, Sfax, Tunisia
| | - Noura Bougacha-Elleuch
- Laboratory of Molecular and Functional Genetics, Faculty of Sciences of Sfax, Sfax University, Sfax University, Street of Soukra km 4, BP 1171-3000, Sfax, Tunisia
| | - Judith Fischer
- Faculty of Medicine, Institute of Human Genetics, Medical Center, University of Freiburg, Freiburg, Germany
| |
Collapse
|
2
|
Onal G, Kutlu O, Ozer E, Gozuacik D, Karaduman A, Dokmeci Emre S. Impairment of lipophagy by PNPLA1 mutations causes lipid droplet accumulation in primary fibroblasts of Autosomal Recessive Congenital Ichthyosis patients. J Dermatol Sci 2019; 93:50-57. [DOI: 10.1016/j.jdermsci.2018.11.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 11/26/2018] [Accepted: 11/28/2018] [Indexed: 01/09/2023]
|
3
|
The Molecular Revolution in Cutaneous Biology: Identification of Skin Disease Genes. J Invest Dermatol 2017; 137:e61-e65. [DOI: 10.1016/j.jid.2016.11.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 11/11/2016] [Indexed: 01/01/2023]
|
4
|
Bland PJ, Chronnell C, Plagnol V, Kayserili H, Kelsell DP. A severe collodion phenotype in the newborn period associated with a homozygous missense mutation in ALOX12B. Br J Dermatol 2014; 173:285-7. [PMID: 25524567 DOI: 10.1111/bjd.13627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- P J Bland
- Centre for Cutaneous Research, The Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, U.K
| | - C Chronnell
- Centre for Cutaneous Research, The Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, U.K
| | - V Plagnol
- Department of Genetics, University College London, London, U.K
| | - H Kayserili
- Medical Genetics Department, Istanbul Medical Faculty, Istanbul University, Millet cad, 34093, Fatih Istanbul, Turkey
| | - D P Kelsell
- Centre for Cutaneous Research, The Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London, U.K
| |
Collapse
|
5
|
A novel mutation in the transglutaminase-1 gene in an autosomal recessive congenital ichthyosis patient. BIOMED RESEARCH INTERNATIONAL 2014; 2014:706827. [PMID: 25180191 PMCID: PMC4142565 DOI: 10.1155/2014/706827] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 06/02/2014] [Indexed: 11/18/2022]
Abstract
Structure-function implication on a novel homozygous Trp250/Gly mutation of transglutaminase-1 (TGM1) observed in a patient of autosomal recessive congenital ichthyosis is invoked from a bioinformatics analysis. Structural consequences of this mutation are hypothesized in comparison to homologous enzyme human factor XIIIA accepted as valid in similar structural analysis and are projected as guidelines for future studies at an experimental level on TGM1 thus mutated.
Collapse
|
6
|
|
7
|
Autosomal recessive congenital ichthyosis. ACTAS DERMO-SIFILIOGRAFICAS 2013; 104:270-84. [PMID: 23562412 DOI: 10.1016/j.adengl.2011.11.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 11/13/2011] [Indexed: 12/15/2022] Open
Abstract
The term autosomal recessive congenital ichthyosis (ARCI) refers to a group of rare disorders of keratinization classified as nonsyndromic forms of ichthyosis. This group was traditionally divided into lamellar ichthyosis (LI) and congenital ichthyosiform erythroderma (CIE) but today it also includes harlequin ichthyosis, self-healing collodion baby, acral self-healing collodion baby, and bathing suit ichthyosis. The combined prevalence of LI and CIE has been estimated at 1 case per 138 000 to 300 000 population. In some countries or regions, such as Norway and the coast of Galicia, the prevalence may be higher due to founder effects. ARCI is genetically highly heterogeneous and has been associated with 6 genes to date: TGM1, ALOXE3, ALOX12B, NIPAL4, CYP4F22, and ABCA12. In this article, we review the current knowledge on ARCI, with a focus on clinical, histological, ultrastructural, genetic, molecular, and treatment-related aspects.
Collapse
|
8
|
Walsh DM, Shah SH, Simpson MA, Morgan NV, Khaliq S, Trembath RC, Mehdi SQ, Maher ER. A Novel ABCA12 Mutation in Two Families with Congenital Ichthyosis. SCIENTIFICA 2012; 2012:649090. [PMID: 24278723 PMCID: PMC3820470 DOI: 10.6064/2012/649090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2012] [Accepted: 11/19/2012] [Indexed: 06/02/2023]
Abstract
Autosomal recessive congenital ichthyosis (ARCI) is a rare genetically heterogeneous disorder characterized by hyperkeratosis in addition to dry, scaly skin. There are six genes currently known to be associated with the disease. Exome sequencing data for two affected individuals with ichthyosis from two apparently unrelated consanguineous Pakistani families was analysed. Potential candidate mutations were analysed in additional family members to determine if the putative mutation segregated with disease status. A novel mutation (c.G4676T, p.Gly1559Val) in ABCA12 occurred at a highly conserved residue, segregated with disease status in both families, and was not detected in 143 control chromosomes. Genotyping with microsatellite markers demonstrated a partial common haplotype in the two families, and a common founder mutation could not be excluded. Comparison to previously reported cases was consistent with the hypothesis that severe loss of function ABCA12 mutations are associated with Harlequin Ichthyosis and missense mutations are preferentially associated with milder phenotypes. In addition to identifying a possible founder mutation, this paper illustrates how advances in genome sequencing technologies could be utilised to rapidly elucidate the molecular basis of inherited skin diseases which can be caused by mutations in multiple disease genes.
Collapse
Affiliation(s)
- D. M. Walsh
- Centre for Rare Diseases and Personalised Medicine, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - S. H. Shah
- Centre for Human Genetics, Sindh Institute of Urology and Transplantation, Karachi 74200, Pakistan
| | - M. A. Simpson
- Division of Genetics and Molecular Medicine, King's College London School of Medicine, Guy's Hospital, London, UK
| | - N. V. Morgan
- Centre for Rare Diseases and Personalised Medicine, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - S. Khaliq
- University of Health Sciences, Lahore, Pakistan
| | - R. C. Trembath
- Division of Genetics and Molecular Medicine, King's College London School of Medicine, Guy's Hospital, London, UK
| | - S. Q. Mehdi
- Centre for Human Genetics, Sindh Institute of Urology and Transplantation, Karachi 74200, Pakistan
| | - E. R. Maher
- Centre for Rare Diseases and Personalised Medicine, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
- West Midlands Regional Genetics Service, Birmingham Women's Hospital, Edgbaston, Birmingham B15 2TT, UK
| |
Collapse
|
9
|
Spacek DV, Perez AF, Ferranti KM, Wu LKL, Moy DM, Magnan DR, King TR. The mouse frizzy (fr) and rat 'hairless' (frCR) mutations are natural variants of protease serine S1 family member 8 (Prss8). Exp Dermatol 2010; 19:527-32. [PMID: 20201958 DOI: 10.1111/j.1600-0625.2009.01054.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Please cite this paper as: The mouse frizzy (fr) and rat 'hairless' (fr(CR)) mutations are natural variants of protease serine S1 family member 8 (Prss8). Experimental Dermatology 2010; 19: 527-532. Abstract: We have previously suggested (based on genetic mapping analysis) that the allelic 'fuzzy' and 'hairless' mutations in the rat are likely orthologues of the mouse frizzy mutation (fr). Here, we analysed three large intraspecific backcross panels that segregated for mouse fr to restrict this locus to a 0.6-Mb region that includes fewer than 30 genes. DNA sequencing of one of these candidates known to be expressed in skin, protease serine S1 family member 8 (Prss8), revealed a T to A transversion associated with the fr allele that would result in a valine to aspartate substitution at residue 170 in the gene product. To test whether this missense mutation might be the molecular basis of this frizzy variant, we crossed fr/fr mice with mice that carried a recessive perinatal lethal mutation in Prss8. Hybrid offspring that inherited both fr and the Prss8 null allele displayed abnormal hair and skin, showing that these two mutations are allelic, and suggesting strongly that the T to A mutation in Prss8 is responsible for the mutant frizzy phenotype. Sequence analysis of all Prss8 coding regions in the 'hairless' rat identified a 12-bp deletion in the third exon, indicating that mouse fr and the rat 'hairless' mutations are indeed orthologues. However, this analysis failed to detect any alterations to Prss8 coding sequences in the allelic 'fuzzy' rat variant.
Collapse
Affiliation(s)
- Damek V Spacek
- Biomolecular Sciences, Central Connecticut State University, New Britain, CT, USA
| | | | | | | | | | | | | |
Collapse
|
10
|
Molecular analysis of 250 patients with autosomal recessive congenital ichthyosis: evidence for mutation hotspots in ALOXE3 and allelic heterogeneity in ALOX12B. J Invest Dermatol 2009; 129:1421-8. [PMID: 19131948 DOI: 10.1038/jid.2008.409] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In recent years several new genes for autosomal recessive congenital ichthyosis (ARCI) have been identified. However, little is known about the molecular epidemiology and pathophysiology of this genetically and clinically heterogeneous group of severe disorders of keratinization. ARCI is characterized by intense scaling of the whole integument often associated with erythema. We and others have shown that mutations in ALOX12B and ALOXE3, coding for the lipoxygenases 12R-LOX and eLOX-3 predominantly synthesized in the epidermis, can underlie this rare condition. Here we have surveyed a large group of 250 patients with ARCI for mutations in these two genes. We have identified 11 different previously unreported mutations in ALOX12B and ALOXE3 in 21 ARCI patients from 19 unrelated families and demonstrated that mutations in the two genes are the second most common cause for ARCI in this cohort of patients. Examination of the molecular data revealed allelic heterogeneity for ALOX12B and two mutational hotspots in ALOXE3. Functional analysis of all missense mutations and a splice site mutation demonstrated that complete loss of function of the enzymes underlies the phenotype. Our findings further establish the pivotal role of the 12-lipoxygenase pathway during epidermal differentiation.
Collapse
|
11
|
|
12
|
Schmuth M, Gruber R, Elias PM, Williams ML. Ichthyosis update: towards a function-driven model of pathogenesis of the disorders of cornification and the role of corneocyte proteins in these disorders. ACTA ACUST UNITED AC 2008; 23:231-56. [PMID: 18159904 DOI: 10.1016/j.yadr.2007.07.011] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Matthias Schmuth
- Department of Dermatology, University of California, VAMC Metabolism 111F, 4150 Clement Street, San Francisco, CA 94121, USA.
| | | | | | | |
Collapse
|
13
|
Abstract
The recent convergence of genetic and biochemical evidence on the activities of lipoxygenase (LOX) enzymes has implicated the production of hepoxilin derivatives (fatty acid epoxyalcohols) in the pathways leading to formation of the water-impermeable barrier of the outer epidermis. The enzymes 12R-LOX and eLOX3 are mutated in a rare form of congenital ichthyosis, and, in vitro, the two enzymes function together to convert arachidonic acid to a specific hepoxilin. Taken together, these lines of evidence suggest an involvement of these enzymes and their products in skin barrier function in all normal subjects. The natural occurrence of the specific hepoxilin products, and their biological role, whether structural or signaling, remain to be defined.
Collapse
Affiliation(s)
- Alan R Brash
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Zheyong Yu
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - William E Boeglin
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Claus Schneider
- Department of Pharmacology, Vanderbilt University Medical Center, Nashville, TN, USA
| |
Collapse
|
14
|
Basel-Vanagaite L, Attia R, Ishida-Yamamoto A, Rainshtein L, Ben Amitai D, Lurie R, Pasmanik-Chor M, Indelman M, Zvulunov A, Saban S, Magal N, Sprecher E, Shohat M. Autosomal recessive ichthyosis with hypotrichosis caused by a mutation in ST14, encoding type II transmembrane serine protease matriptase. Am J Hum Genet 2007; 80:467-77. [PMID: 17273967 PMCID: PMC1821100 DOI: 10.1086/512487] [Citation(s) in RCA: 145] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2006] [Accepted: 01/08/2007] [Indexed: 12/25/2022] Open
Abstract
In this article, we describe a novel autosomal recessive ichthyosis with hypotrichosis syndrome, characterized by congenital ichthyosis associated with abnormal hair. Using homozygosity mapping, we mapped the disease locus to 11q24.3-q25. We screened the ST14 gene, which encodes matriptase, since transplantation of skin from matriptase(-/-)-knockout mice onto adult athymic nude mice has been shown elsewhere to result in an ichthyosislike phenotype associated with almost complete absence of erupted pelage hairs. Mutation analysis revealed a missense mutation, G827R, in the highly conserved peptidase S1-S6 domain. Marked skin hyperkeratosis due to impaired degradation of the stratum corneum corneodesmosomes was observed in the affected individuals, which suggests that matriptase plays a significant role in epidermal desquamation.
Collapse
|
15
|
Fürstenberger G, Epp N, Eckl KM, Hennies HC, Jørgensen C, Hallenborg P, Kristiansen K, Krieg P. Role of epidermis-type lipoxygenases for skin barrier function and adipocyte differentiation. Prostaglandins Other Lipid Mediat 2007; 82:128-34. [PMID: 17164140 DOI: 10.1016/j.prostaglandins.2006.05.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2006] [Accepted: 05/14/2006] [Indexed: 11/17/2022]
Abstract
12R-lipoxygenase (12R-LOX) and epidermis-type LOX-3 (eLOX-3) are novel members of the multigene family of mammalian LOX. A considerable gap exists between the identification of these enzymes and their biologic function. Here, we present evidence that 12R-LOX and eLOX-3, acting in sequence, and eLOX-3 in combination with another, not yet identified LOX are critically involved in terminal differentiation of keratinocytes and adipocytes, respectively. Mutational inactivation of 12R-LOX and/or eLOX-3 has been found to be associated with development of an inherited ichthyosiform skin disorder in humans and genetic ablation of 12R-LOX causes a severe impairment of the epidermal lipid barrier in mice leading to post-natal death of the animals. In preadipocytes, a LOX-dependent PPARgamma activating ligand is released into the cell supernatant early upon induction of differentiation and available evidence indicates that this ligand is an eLOX-3-derived product. In accordance with this data is the observation that forced expression of eLOX-3 enhances adipocyte differentiation.
Collapse
Affiliation(s)
- Gerhard Fürstenberger
- Research Group Eicosanoids and Tumor Development, Deutsches Krebsforschungszentrum, Heidelberg, Germany
| | | | | | | | | | | | | | | |
Collapse
|
16
|
Al Aboud D, Al Aboud K, Ramesh V, Kumar J. Lamellar ichthyosis in a Saudi kindred. Skinmed 2007; 6:40-1. [PMID: 17215621 DOI: 10.1111/j.1540-9740.2007.05707.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
A series of 20 patients aged 4-16 years presented with lamellar ichthyosis at the dermatology unit of King Faisal Hospital at Taif in western Saudi Arabia. Though they had come from different families, they all belonged to the same tribe that was confined to a rural area in the precincts of Taif. The tribe is known for consanguineous marriages. The affected children are from 5 sibships. All the children presented with generalized thick dark scales. The history revealed that they all were born with a thick membrane around them, which was shed soon after. Gradually over months and years there was development of generalized scaling. A prototype is shown in the Figure. The scales had become darker and thicker with the passage of time. There was no pruritus. Teeth and mucous membranes were normal. None of the patients had erythroderma. The associated findings in some of the children were ectropion and alopecia. Contractures including pseudoainhum were also observed in some children. None of the patients' parents was found to be affected with a similar condition. There was no improvement with age. Skin biopsies from several of the patients revealed only hyperkeratosis. All had to be managed with topical emollients since they could not afford oral retinoids.
Collapse
Affiliation(s)
- Daifullah Al Aboud
- Dermatology Department, King Khalid Military City Hospital, Hafer Al Baten, Saudi Arabia
| | | | | | | |
Collapse
|
17
|
Oji V, Hautier JM, Ahvazi B, Hausser I, Aufenvenne K, Walker T, Seller N, Steijlen PM, Küster W, Hovnanian A, Hennies HC, Traupe H. Bathing suit ichthyosis is caused by transglutaminase-1 deficiency: evidence for a temperature-sensitive phenotype. Hum Mol Genet 2006; 15:3083-97. [PMID: 16968736 DOI: 10.1093/hmg/ddl249] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Bathing suit ichthyosis (BSI) is a striking and unique clinical form of autosomal recessive congenital ichthyosis characterized by pronounced scaling on the bathing suit areas but sparing of the extremities and the central face. Here we report on a series of 10 BSI patients. Our genetic, ultrastructural and biochemical investigations show that BSI is caused by transglutaminase-1 (TGase-1) deficiency. Altogether, we identified 13 mutations in TGM1-among them seven novel missense mutations and one novel nonsense mutation. Structural modeling for the Tyr276Asn mutation reveals that the residue is buried in the hydrophobic interior of the enzyme and that the hydroxyl side chain of Tyr276 is exposed to solvent in a cavity of the enzyme. Cryosections of healthy skin areas demonstrated an almost normal TGase activity, in contrast to the affected BSI skin, which only showed a cytoplasmic and clearly reduced TGase-1 activity. The distribution of TGase-1 substrates in the epidermis of affected skin corresponded to the situation in TGase-1 deficiency. Interestingly, the expression of TGase-3 and cathepsin D was reduced. Digital thermography validated a striking correlation between warmer body areas and presence of scaling in patients suggesting a decisive influence of the skin temperature. In situ TGase testing in skin of BSI patients demonstrated a marked decrease of enzyme activity when the temperature was increased from 25 to 37 degrees C. We conclude that BSI is caused by TGase-1 deficiency and suggest that it is a temperature-sensitive phenotype.
Collapse
Affiliation(s)
- Vinzenz Oji
- Department of Dermatology, University of Muenster, Von-Esmarch-Str. 58 D-48149, Münster, Germany.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Melin M, Klar J, Jr Gedde-Dahl T, Fredriksson R, Hausser I, Brandrup F, Bygum A, Vahlquist A, Hellström Pigg M, Dahl N. A founder mutation for ichthyosis prematurity syndrome restricted to 76 kb by haplotype association. J Hum Genet 2006; 51:864-871. [PMID: 16946994 DOI: 10.1007/s10038-006-0035-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2006] [Accepted: 06/29/2006] [Indexed: 10/24/2022]
Abstract
Autosomal recessive congenital ichthyosis (ARCI) is a group of keratinisation disorders that includes the ichthyosis prematurity syndrome (IPS). IPS is rare and almost exclusively present in a restricted region in the middle of Norway and Sweden, which indicates a founder effect for the disorder. We recently reported linkage of IPS to chromosome 9q34, and we present here the subsequent fine-mapping of this region with known and novel microsatellite markers as well as single nucleotide polymorphisms (SNPs). Allelic association, evaluated with Fisher's exact test and P (excess), was used to refine the IPS haplotype to approximately 1.6 Mb. On the basis of the average length of the haplotype in IPS patients, we calculated the age of a founder mutation to approximately 1,900 years. The IPS haplotype contains a core region of 76 kb consisting of four marker alleles shared by 97.7% of the chromosomes associated with IPS. This region spans four known genes, all of which are expressed in mature epidermal cells. We present the results from the analysis of these four genes and their corresponding transcripts in normal and patient-derived samples.
Collapse
Affiliation(s)
- M Melin
- Department of Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, 751 85, Sweden
| | - J Klar
- Department of Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, 751 85, Sweden
| | - T Jr Gedde-Dahl
- Department of Dermatology, Rikshospitalet University Hospital, and Institute of Forensic Medicine, University of Oslo, Oslo, Norway
| | - R Fredriksson
- Department of Neuroscience, Uppsala University, Uppsala, Sweden
| | - I Hausser
- Department of Dermatology, University of Heidelberg, Heidelberg, Germany
| | - F Brandrup
- Department of Dermatology, Odense University Hospital, Odense, Denmark
| | - A Bygum
- Department of Dermatology, Odense University Hospital, Odense, Denmark
| | - A Vahlquist
- Department of Medical Science, Uppsala University Hospital, Uppsala, Sweden
| | - M Hellström Pigg
- Department of Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, 751 85, Sweden
| | - N Dahl
- Department of Genetics and Pathology, Rudbeck Laboratory, Uppsala University, Uppsala, 751 85, Sweden.
| |
Collapse
|
19
|
Eckl KM, Krieg P, Küster W, Traupe H, André F, Wittstruck N, Fürstenberger G, Hennies HC. Mutation spectrum and functional analysis of epidermis-type lipoxygenases in patients with autosomal recessive congenital ichthyosis. Hum Mutat 2006; 26:351-61. [PMID: 16116617 DOI: 10.1002/humu.20236] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Autosomal-recessive congenital ichthyosis (ARCI) is a clinically and genetically heterogeneous group of severe hereditary keratinization disorders characterized by intense scaling of the whole integument, and differences in color and shape. It is often associated with erythema. To date, six loci for ARCI have been mapped. Mutations in ALOXE3 and ALOX12B on chromosome 17p13, which code for two different epidermal lipoxygenases, were recently found in patients with ichthyosiform erythroderma from Turkey, France, and North Africa. Here we describe molecular and clinical findings in 17 families with ARCI originating from Central Europe, Turkey, and the Indian subcontinent, with mutations in ALOXE3 or ALOX12B. We identified 11 novel point mutations in ALOX12B (one nonsense mutation and 10 missense mutations) and four different inactivating mutations in ALOXE3. The gene products of ALOX12B and ALOXE3, the epidermal lipoxygenases 12R-LOX and eLOX3, respectively, are preferentially synthesized in the skin. They act in sequence to convert arachidonic acid via 12(R)-HPETE to the corresponding epoxyalcohol, 8(R)-hydroxy-11(R),12(R)-epoxyeicosatrienoic acid. To assess the impairment of enzyme activity, we expressed the mutated genes in vitro and determined the activity of the recombinant proteins toward their genuine substrates. All but one of the recombinant mutants were enzymatically inactive. The characterization of disease-causing mutations in ALOXE3 and ALOX12B and the resulting ARCI phenotypes did not result in clear diagnostic criteria; however, we found a first correlation between the genetic findings and the clinical presentation of ichthyosis.
Collapse
Affiliation(s)
- Katja-Martina Eckl
- Cologne Center for Genomics, Division of Dermatogenetics, University of Cologne, Cologne, Germany
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Ashoor G, Massé M, García Luciano LM, Sheffer R, Martinez-Mir A, Christiano AM, Zlotogorski A. A novel mutation in the 12(R)-lipoxygenase (ALOX12B) gene underlies nonbullous congenital ichthyosiform erythroderma. Br J Dermatol 2006; 155:198-200. [PMID: 16792775 DOI: 10.1111/j.1365-2133.2006.07188.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- G Ashoor
- Genetic Skin Disease Group, St John's Institute of Dermatology, The Guy's, King's College and St Thomas' Hospital Medical School, London, UK
| | | | | | | | | | | | | |
Collapse
|
21
|
Akiyama M. Harlequin ichthyosis and other autosomal recessive congenital ichthyoses: the underlying genetic defects and pathomechanisms. J Dermatol Sci 2006; 42:83-9. [PMID: 16481150 DOI: 10.1016/j.jdermsci.2006.01.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Revised: 01/06/2006] [Accepted: 01/10/2006] [Indexed: 11/24/2022]
Abstract
Autosomal recessive congenital ichthyoses (ARCI) include several severe subtypes including harlequin ichthyosis (HI), lamellar ichthyosis and non-bullous congenital ichthyosiform erythroderma. Patients with these severe types of ichthyoses frequently show severe hyperkeratosis and scales over a large part of the body surface form birth and their quality of life is often severely affected. Recently, research into the pathomechanisms of these severe congenital ichthyoses have advanced dramatically and led to the identification of several causative genes and molecules underlying the genetic defects. To date, seven loci have been identified that are associated with ARCI and, among them, five causative genes and molecules have been detected. The five genes are transglutaminase 1 gene (TGM1), ABCA12, two lipoxygenase genes, ALOXE3 and ALOX12B and ichthyin. One of these components, ABCA12, has recently been shown to be a keratinocyte lipid transporter associated with lipid transport in lamellar granules and loss of ABCA12 function leads to a defective lipid barrier in the stratum corneum, resulting in the HI phenotype. Transglutaminse 1 deficiency was reported to cause a malformed cornified cell envelope leading to a defect in the intercellular lipid layers in the stratum corneum and defective stratum corneum barrier function resulting in an ichthyosis phenotype. Thus, defective intercellular lipid layers are major findings in autosomal recessive congenital ichthyoses. Information concerning ARCI genetic defects and disease pathomechanisms are beneficial for providing better treatments and genetic counseling including prenatal diagnosis for families affect by ichthyoses.
Collapse
Affiliation(s)
- Masashi Akiyama
- Department of Dermatology, Hokkaido University Graduate School of Medicine, North 15 West 7, Sapporo 060-8638, Japan.
| |
Collapse
|
22
|
Mizrachi-Koren M, Geiger D, Indelman M, Bitterman-Deutsch O, Bergman R, Sprecher E. Identification of a novel locus associated with congenital recessive ichthyosis on 12p11.2-q13. J Invest Dermatol 2005; 125:456-62. [PMID: 16117785 DOI: 10.1111/j.0022-202x.2005.23777.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Congenital recessive ichthyoses represent a vast and markedly heterogeneous group of diseases that have been mapped to at least seven distinct chromosomal loci. In this study, we ascertained two consanguineous families presenting with congenital ichthyosis. Using homozygosity mapping, we identified a 6.5 cM homozygous region on 12p11.2-q13 shared by all affected individuals. Multipoint logarithm of odds ratio (LOD) score analysis placed the new locus between markers D12S345 and D12S390 with a maximum LOD score of 4.79 at marker CH12SSR13. This region harbors PPHLN1, encoding periphilin 1, a protein involved in the cornification process. No deleterious mutations were identified within the coding region of this gene, suggesting the existence of another gene associated with epidermal differentiation on 12p11.2-q13.
Collapse
Affiliation(s)
- Mordechai Mizrachi-Koren
- Laboratory of Molecular Dermatology, Department of Dermatology, Rambam Medical Center, Haifa, Israel
| | | | | | | | | | | |
Collapse
|
23
|
Candi E, Schmidt R, Melino G. The cornified envelope: a model of cell death in the skin. Nat Rev Mol Cell Biol 2005; 6:328-40. [PMID: 15803139 DOI: 10.1038/nrm1619] [Citation(s) in RCA: 1206] [Impact Index Per Article: 63.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The epidermis functions as a barrier against the environment by means of several layers of terminally differentiated, dead keratinocytes - the cornified layer, which forms the endpoint of epidermal differentiation and death. The cornified envelope replaces the plasma membrane of differentiating keratinocytes and consists of keratins that are enclosed within an insoluble amalgam of proteins, which are crosslinked by transglutaminases and surrounded by a lipid envelope. New insights into the molecular mechanisms and the physiological endpoints of cornification are increasing our understanding of the pathological defects of this unique form of programmed cell death, which is associated with barrier malfunctions and ichthyosis.
Collapse
Affiliation(s)
- Eleonora Candi
- Biochemistry Laboratory, IDI-IRCCS, c/o Department of Experimental Medicine, University of Rome Tor Vergata, 00133 Rome, Italy
| | | | | |
Collapse
|
24
|
Hernández-Martín A. Avances biomoleculares en los trastornos epidérmicos hereditarios. ACTAS DERMO-SIFILIOGRAFICAS 2005; 96:203-16. [PMID: 16476370 DOI: 10.1016/s0001-7310(05)73072-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
In recent years, the genes responsible for many hereditary skin diseases have been discovered. These genes encode different proteins that participate in the terminal differentiation of the epidermis, so their alteration or absence causes a keratinization disorder and/or an increase in skin fragility. Thanks to genetic analyses, we have been able to understand the physiopathology of numerous genodermatoses and we have become closer to diagnosing many others. In the not-too-distant future, biomolecular techniques may foreseeably help us prevent and treat these processes, which include skin diseases as serious as epidermolysis bullosa or epidermolytic hyperkeratosis. In this article, we will study the most recent biomolecular findings referring to keratinization and epidermal disorders, mentioning the altered genes and/ or the defective proteins that cause them.
Collapse
|
25
|
Lefèvre C, Bouadjar B, Karaduman A, Jobard F, Saker S, Ozguc M, Lathrop M, Prud'homme JF, Fischer J. Mutations in ichthyin a new gene on chromosome 5q33 in a new form of autosomal recessive congenital ichthyosis. Hum Mol Genet 2004; 13:2473-82. [PMID: 15317751 DOI: 10.1093/hmg/ddh263] [Citation(s) in RCA: 132] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report the genomic localization by homozygosity mapping and the identification of a gene for a new form of non-syndromic autosomal recessive congenital ichthyosis. The phenotype usually presents as non-bullous congenital ichthyosiform erythroderma with fine whitish scaling on an erythrodermal background; larger brownish scales are present on the buttocks, neck and legs. A few patients presented a more generalized lamellar ichthyosis. Palmoplantar keratoderma was present in all cases, whereas only 60% of the patients were born as collodion babies. Six homozygous mutations including one nonsense and five missense mutations were identified in a new gene, ichthyin, on chromosome 5q33 in 23 patients from 14 consanguineous families from Algeria, Colombia, Syria and Turkey. Ichthyin encodes a protein with several transmembrane domains which belongs to a new family of proteins of unknown function localized in the plasma membrane (PFAM: DUF803), with homologies to both transporters and G-protein coupled receptors. This family includes NIPA1, in which a mutation was recently described in a dominant form of spastic paraplegia (SPG6). We propose that ichthyin and NIPA1 are membrane receptors for ligands (trioxilins A3 and B3) from the hepoxilin pathway.
Collapse
MESH Headings
- Amino Acid Sequence
- Base Sequence
- Chromosome Mapping
- Chromosomes, Human, Pair 5/genetics
- Consanguinity
- DNA Mutational Analysis
- Female
- Gene Expression
- Haplotypes
- Humans
- Ichthyosiform Erythroderma, Congenital/ethnology
- Ichthyosiform Erythroderma, Congenital/genetics
- Ichthyosis, Lamellar/ethnology
- Ichthyosis, Lamellar/genetics
- Keratoderma, Palmoplantar/ethnology
- Keratoderma, Palmoplantar/genetics
- Linkage Disequilibrium
- Male
- Molecular Sequence Data
- Mutation/genetics
- Pedigree
- Receptors, Cell Surface/genetics
- Receptors, G-Protein-Coupled/genetics
Collapse
|
26
|
Akiyama M, Sawamura D, Shimizu H. The clinical spectrum of nonbullous congenital ichthyosiform erythroderma and lamellar ichthyosis. Clin Exp Dermatol 2003; 28:235-40. [PMID: 12780701 DOI: 10.1046/j.1365-2230.2003.01295.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Until about 20 years ago, the term lamellar ichthyosis (LI) represented all nonbullous autosomal recessive ichthyoses except for harlequin ichthyosis and ichthyosis syndromes. Since the 1980s, nonbullous autosomal recessive ichthyoses have been divided into two major clinical entities, nonbullous congenital ichthyosiform erythroderma (NBCIE) and LI. The nature of scaling and intensity of erythroderma are important clinical features that distinguish between NBCIE and LI. However, a considerable number of cases show an intermediate phenotype between the two classic clinical features. Histologically, parakeratosis and inflammatory cell infiltration are seen more frequently in NBCIE than in LI and the stratum corneum is usually thicker in LI than in NBCIE. However, neither histopathological findings nor ultrastructural features seem to help clearly distinguish between NBCIE and LI. Mutations in any of the three known causative genes, TGM1, ALOXE3 or ALOX12B, can lead either to NBCIE or LI. Candidate genes specific to either NBCIE or LI alone have not been identified. Based on these facts, it might be better to consider NBCIE and LI as variations of a single keratinization disorder, although the classification of these autosomal recessive congenital ichthyosis patients into NBCIE or LI depending on their clinical features is still useful for practical patient management.
Collapse
Affiliation(s)
- M Akiyama
- Department of Dermatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
| | | | | |
Collapse
|
27
|
Paller AS. In this issue: genotype-phenotype correlations: lessons learned from 'milder' genodermatoses. J Invest Dermatol 2003; 120:vi-vii. [PMID: 12542545 DOI: 10.1046/j.1523-1747.2003.t01-1-12002.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
28
|
Baala L, Hadj-Rabia S, Hamel-Teillac D, Hadchouel M, Prost C, Leal SM, Jacquemin E, Sefiani A, de Prost Y, Courtois G, Munnich A, Lyonnet S, Vabres P. Homozygosity mapping of a locus for a novel syndromic ichthyosis to chromosome 3q27-q28. J Invest Dermatol 2002; 119:70-6. [PMID: 12164927 PMCID: PMC6173186 DOI: 10.1046/j.1523-1747.2002.01809.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Ichthyosis is a heterogeneous group of skin disorders characterized by abnormal epidermal scaling. Occasionally, extracutaneous features are associated. A novel autosomal recessive ichthyosis syndrome is described here with scalp hypotrichosis, scarring alopecia, sclerosing cholangitis, and leukocyte vacuolization in two inbred kindreds of Moroccan origin. We also report the mapping of the diseased gene to a 21.2 cM interval of chromosome 3q27-q28. Homo zygosity for polymorphic markers has enabled us to reduce the genetic interval to a 16.2 cM region. Furthermore, comparison of mutant chromosomes in the two families has suggested a common ancestral mutant haplotype. This linkage disequilibrium has reduced the genetic interval encompassing the diseased gene to less than 9.5 cM maximum. Further study of additional families from the same geographic area will hopefully reduce the genetic interval as well as help in the cloning of the gene involved in this rare disorder.
Collapse
Affiliation(s)
- Lekbir Baala
- Département de Génétique et Unité de Recherches sur les Handicaps Génétiques de l’Enfant INSERM U-393, Hôpital Necker-Enfants Malades, Paris, France
- Département de Génétique et Biologie moléculaire, INH Rabat et Faculté des Sciences Kénitra, Morocco
| | - Smaïl Hadj-Rabia
- Département de Génétique et Unité de Recherches sur les Handicaps Génétiques de l’Enfant INSERM U-393, Hôpital Necker-Enfants Malades, Paris, France
- Service de Dermatologie, Hôpital Necker-Enfants Malades Paris, France
| | | | - Michelle Hadchouel
- Service d’Hépatologie Infantile et Unité INSERM U-347 Hôpital Kremlin Bicétre, Bicétre, France
| | - Catherine Prost
- Laboratoire d’Histologie et de Thérapie Génique. UFR SBMH, Bobigny France
| | - Suzanne M. Leal
- Laboratory of Statistical Genetics, The Rockefeller University, New York, New York, U.S.A
| | - Emmanuel Jacquemin
- Service d’Hépatologie Infantile et Unité INSERM U-347 Hôpital Kremlin Bicétre, Bicétre, France
| | - Abdelaziz Sefiani
- Département de Génétique et Biologie moléculaire, INH Rabat et Faculté des Sciences Kénitra, Morocco
| | - Yves de Prost
- Service de Dermatologie, Hôpital Necker-Enfants Malades Paris, France
| | - Gilles Courtois
- Unite de Biologie Moleculaire de l’Expression Genique, URA CNRS 1773, Institut Pasteur, Paris, France
| | - Arnold Munnich
- Département de Génétique et Unité de Recherches sur les Handicaps Génétiques de l’Enfant INSERM U-393, Hôpital Necker-Enfants Malades, Paris, France
| | - Stanislas Lyonnet
- Département de Génétique et Unité de Recherches sur les Handicaps Génétiques de l’Enfant INSERM U-393, Hôpital Necker-Enfants Malades, Paris, France
| | - Pierre Vabres
- Département de Génétique et Unité de Recherches sur les Handicaps Génétiques de l’Enfant INSERM U-393, Hôpital Necker-Enfants Malades, Paris, France
- Service de Dermatologie, Hôpital Necker-Enfants Malades Paris, France
| |
Collapse
|