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Noda T, Takeichi T, Tanahashi K, Ogawa Y, Takeuchi S, Yoshikawa T, Toriyama E, Ashida M, Imakado S, Tsuchihashi H, Okamoto T, Okuno Y, Ogi T, Sugiura K, Kubo A, Muro Y, Suga Y, Ishida-Yamamoto A, Akiyama M. Updated mutational spectrum and genotype-phenotype correlations in ichthyosis patients with ABCA12 pathogenic variants. Exp Dermatol 2024; 33:e15072. [PMID: 38576105 DOI: 10.1111/exd.15072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/18/2024] [Accepted: 03/21/2024] [Indexed: 04/06/2024]
Abstract
Autosomal recessive congenital ichthyoses (ARCI) is a genetically heterogeneous condition that can be caused by pathogenic variants in at least 12 genes, including ABCA12. ARCI mainly consists of congenital ichthyosiform erythroderma (CIE), lamellar ichthyosis (LI) and harlequin ichthyosis (HI). The objective was to determine previously unreported pathogenic variants in ABCA12 and to update genotype-phenotype correlations for patients with pathogenic ABCA12 variants. Pathogenic variants in ABCA12 were detected using Sanger sequencing or a combination of Sanger sequencing and whole-exome sequencing. To verify the pathogenicity of a previously unreported large deletion and intron variant, cDNA analysis was performed using total RNA extracted from hair roots. Genetic analyses were performed on the patients with CIE, LI, HI and non-congenital ichthyosis with unusual phenotypes (NIUP), and 11 previously unreported ABCA12 variants were identified. Sequencing of cDNA confirmed the aberrant splicing of the variant ABCA12 in the patients with the previously unreported large deletion and intron variant. Our findings expand the phenotype spectrum of ichthyosis patients with ABCA12 pathogenic variants. The present missense variants in ABCA12 are considered to be heterogenous in pathogenicity, and they lead to varying disease severities in patients with ARCI and non-congenital ichthyosis with unusual phenotypes (NIUP).
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Affiliation(s)
- Tatsuhiro Noda
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Takuya Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
- Nagoya University Institute for Advanced Research, Nagoya, Japan
| | - Kana Tanahashi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Yasushi Ogawa
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - So Takeuchi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Takenori Yoshikawa
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Erika Toriyama
- Department of Dermatology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - Miwa Ashida
- Department of Dermatology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Sumihisa Imakado
- Department of Dermatology, Japanese Red Cross Medical Center, Tokyo, Japan
| | - Hitoshi Tsuchihashi
- Department of Dermatology, Juntendo University Urayasu Hospital, Urayasu, Japan
| | - Takashi Okamoto
- Department of Dermatology, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Tomoo Ogi
- Department of Genetics, Research Institute of Environmental Medicine (RIeM), Nagoya University, Nagoya, Japan
- Department of Human Genetics and Molecular Biology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kazumitsu Sugiura
- Department of Dermatology, Fujita Health University School of Medicine, Toyoake, Japan
| | - Akiharu Kubo
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan
| | - Yoshinao Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Yasushi Suga
- Department of Dermatology, Juntendo University Urayasu Hospital, Urayasu, Japan
| | | | - Masashi Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
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2
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Thakur K, Sehgal A, Goel B, Chaudhary M. Autosomal recessive ALOX12B gene and consecutive collodion baby. BMJ Case Rep 2024; 17:e257608. [PMID: 38514164 PMCID: PMC10961509 DOI: 10.1136/bcr-2023-257608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024] Open
Abstract
Autosomal recessive congenital ichthyosis is a type of inherited ichthyosis which is a rare cluster of genetic disorders leading to defective keratinisation. The combined prevalence for lamellar ichthyosis and congenital ichthyosiform erythroderma is almost 1 per 200 000-300 000 people. Among all the mutations in this gene, missense and frameshift mutations are most common which account for 80% of the cases. Our patient had a mutation in R-type arachidonate 12-lipoxygenase gene (ALOX12B, OMIM*603741).
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Affiliation(s)
| | - Alka Sehgal
- Obstetrics and Gynecology, GMCH, Chandigarh, India
| | - Bharti Goel
- Obstetrics and Gynecology, GMCH, Chandigarh, India
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3
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Raj C, Singh S, Gupta A. Psychosocial impact of severe autosomal recessive congenital ichthyosis. Br J Dermatol 2024; 190:565-566. [PMID: 37976236 DOI: 10.1093/bjd/ljad456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/06/2023] [Accepted: 12/17/2023] [Indexed: 11/19/2023]
Abstract
A clinician’s and a patient’s perspective on living with lamellar ichthyosis for over half a century.
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Affiliation(s)
- Christina Raj
- Center for Ichthyosis Related Members Foundation India, Secunderabad, Telangana, India
| | - Shrishti Singh
- Department of Dermatology, Dr. D.Y. Patil Medical College, Hospital and Research Centre, Pimpri, Pune, India
| | - Aayush Gupta
- Department of Dermatology, Dr. D.Y. Patil Medical College, Hospital and Research Centre, Pimpri, Pune, India
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Azeez F, Sunil M, Sahadevan G, Kidangazhiathmana A, Mathews I. Lamellar ichthyosis with a novel NIPAL4 variant showing dramatic response to high-dose vitamin D therapy. Pediatr Dermatol 2024; 41:348-350. [PMID: 38018299 DOI: 10.1111/pde.15484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 11/07/2023] [Indexed: 11/30/2023]
Abstract
Therapeutic options are limited in cases of autosomal recessive congenital ichthyosis with inadequate response to topical agents. Acitretin is the current standard of care in these patients, but its use is limited by cumulative toxicity when prolonged therapy is needed in children. There is evidence to suggest that high doses of vitamin D can normalize keratinization and suppress inflammatory cytokines. Here, we report a patient with lamellar ichthyosis with a novel mutation in the Nipa-like Domain-Containing 4 (NIPAL4) gene. High dose short-term vitamin D therapy was administered with a dramatic and sustained clinical response.
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Affiliation(s)
- Femina Azeez
- Department of Dermatology, Government Medical College, Kottayam, Kerala, India
| | - Minu Sunil
- Department of Dermatology, Government Medical College, Kottayam, Kerala, India
| | | | | | - Irene Mathews
- Department of Dermatology, Government Medical College, Kottayam, Kerala, India
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5
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Severino-Freire M, Granier Tournier C, Chiaverini C, Audouze A, Morice-Picard F, Texier H, Dreyfus I, Bing-Lecointe AC, Mallet S, Bodemer C, Fischer J, Jonca N, Mazereeuw-Hautier J. French national protocol for the management of congenital ichthyosis. Ann Dermatol Venereol 2024; 151:103247. [PMID: 38513308 DOI: 10.1016/j.annder.2024.103247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 09/27/2023] [Indexed: 03/23/2024]
Abstract
Congenital ichthyoses (CI) comprise a heterogeneous group of monogenic genetic skin diseases characterized by diffuse scaling, often associated with skin inflammation. Diagnosis of the individual form of ichthyosis is complex and is guided by clinical expertise. CI usually has a major impact on quality of life (QOL) and thus requires lifelong treatment. To date, there are no curative therapies, although various symptomatic treatment options exist. The present protocol for the management of CI has been drawn up in accordance with the recommendations published in 2012 by the French National Authority for Health, based on a literature review, with the help and validation of members of the French network for rare skin diseases (FIMARAD). It provides a summary of evidence and expert-based recommendations and is intended to help clinicians with the management of these rare and often complex diseases.
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Affiliation(s)
- M Severino-Freire
- University Hospital Center of Toulouse, Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, 24, Chemin de Pouvourville, TSA 30030 Toulouse Cedex 9, France
| | - C Granier Tournier
- University Hospital Center of Toulouse, Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, 24, Chemin de Pouvourville, TSA 30030 Toulouse Cedex 9, France
| | - C Chiaverini
- University Hospital Center of Nice, Department of Dermatology, Archet 2 Hospital, CS 23079, 06202 Nice Cedex 3, France
| | - A Audouze
- Association Ichtyose France, 37 rue du Golf, 03700 Bellerive sur Allier, France
| | - F Morice-Picard
- Department of Dermatology, University Hospital Center of Bordeaux - Hôpital Saint André, 1 Rue Jean Burguet, 33075 Bordeaux Cedex, France
| | - H Texier
- University Hospital Center of Toulouse, Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, 24, Chemin de Pouvourville, TSA 30030 Toulouse Cedex 9, France
| | - I Dreyfus
- University Hospital Center of Toulouse, Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, 24, Chemin de Pouvourville, TSA 30030 Toulouse Cedex 9, France
| | - A-C Bing-Lecointe
- Hospital Annecy-Genevois site Annecy, 1 Avenue De L'hôpital, 74370 Annecy, France
| | - S Mallet
- Department of Dermatology, University Hospital Center of Marseille, 264 rue Saint-Pierre, 13005 Marseille, France
| | - C Bodemer
- Department of Dermatology, Reference Center for Genodermatoses and Rare Skin Diseases (MAGEC), Hôpital Necker-Enfants Malades, AP-HP, 149 Rue de Sèvres, 75743 Paris cedex 15, France
| | - J Fischer
- Institute of Human Genetics, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Breisacher Straße 153, 79110 Freiburg, Germany
| | - N Jonca
- University Hospital Center of Toulouse, Hôpital Purpan, Cell Biology and Cytology Laboratory, Institut Fédératif de Biologie, Toulouse F-31300, France
| | - J Mazereeuw-Hautier
- University Hospital Center of Toulouse, Reference Centre for Rare Skin Diseases, Department of Dermatology, Larrey Hospital, 24, Chemin de Pouvourville, TSA 30030 Toulouse Cedex 9, France.
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6
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González RA, Ojeda AV, Nova NA, Prasca RJ. Harlequin ichthyosis, prenatal diagnosis: the ultrasound recognition. BMJ Case Rep 2024; 17:e256859. [PMID: 38233004 PMCID: PMC10806978 DOI: 10.1136/bcr-2023-256859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024] Open
Abstract
Harlequin ichthyosis (HI) is an extremely rare disease with a prevalence of less than 1/300 000 live newborns and no more than 100 cases reported worldwide. It corresponds to a genodermatoses autosomal recessive inheritance, typically, with postnatal recognition due to the complexity of prenatal diagnosis. Advances in prenatal genetic testing allow sequencing of the affected gene and confirmation of the diagnosis after recognition of ultrasound markers. The prenatal acknowledgement of the disease significantly marks the course of the pregnancy; considering the perinatal high risk and neonatal mortality, this entity can be classified as lethal. Taking into account the legislation of each country, the possibility of pregnancy termination should be considered as an acceptable option. We present a case of prenatally diagnosed HI in the first ultrasound evaluation by the Maternal Fetal Medicine unit at 29 weeks of gestation, in which after counselling to the parents, the interruption of the gestation was decided.
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Affiliation(s)
- Ricardo Alfonso González
- Maternal Fetal Medicine Unit, El Bosque University Faculty of Medicine, Bogota, Colombia
- Maternal Fetal Medicine Unit, Fundacion Universitaria de Ciencias de la Salud, Bogota, Colombia
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Takeichi T, Hamada T, Yamamoto M, Ito Y, Kawaguchi A, Kobashi H, Yoshikawa T, Koga H, Ishii N, Nakama T, Muro Y, Ogi T, Akiyama M. Patients with keratinization disorders due to ABCA12 variants showing pityriasis rubra pilaris phenotypes. J Dermatol 2024; 51:101-105. [PMID: 37752865 DOI: 10.1111/1346-8138.16967] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/17/2023] [Accepted: 09/01/2023] [Indexed: 09/28/2023]
Abstract
Pathogenic variants in ABCA12 are important causative genetic defects for autosomal recessive congenital ichthyoses (ARCI), which include congenital ichthyosiform erythroderma (CIE), harlequin ichthyosis, and lamellar ichthyosis. In addition, pathogenic variants in ABCA12 are known to cause a localized nevoid form of CIE due to recessive mosaicism. We previously reported siblings who carried an ABCA12 variant but did not show a "congenital" phenotype. They were considered to have pityriasis rubra pilaris (PRP). Here, we present a further patient with ABCA12 variants whose phenotype was not congenital ichthyosis, in an independent family. Notably, these three patients had geographic unaffected areas. Such areas are not usually found in patients with ARCI who have ABCA12 variants, suggesting mild phenotypes for these patients. Interestingly, the histological features of the ichthyotic lesions in these patients resembled those of PRP. All three patients had homozygous pathogenic missense variants in ABCA12. Our findings expand the phenotypic spectrum of patients with ABCA12 variants.
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Affiliation(s)
- Takuya Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Takahiro Hamada
- Department of Dermatology, Kurume University School of Medicine, Kurume, Japan
| | - Mayuko Yamamoto
- Department of Dermatology, Kochi Medical School, Kochi University, Nankoku, Japan
| | - Yasutoshi Ito
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Aya Kawaguchi
- Department of Dermatology, Kurume University School of Medicine, Kurume, Japan
| | - Haruka Kobashi
- Department of Dermatology, Kochi Medical School, Kochi University, Nankoku, Japan
| | - Takenori Yoshikawa
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hiroshi Koga
- Department of Dermatology, Kurume University School of Medicine, Kurume, Japan
- Kurume University Institute of Cutaneous Cell Biology, Kurume, Japan
| | - Norito Ishii
- Department of Dermatology, Kurume University School of Medicine, Kurume, Japan
- Kurume University Institute of Cutaneous Cell Biology, Kurume, Japan
| | - Takekuni Nakama
- Department of Dermatology, Kurume University School of Medicine, Kurume, Japan
- Kurume University Institute of Cutaneous Cell Biology, Kurume, Japan
| | - Yoshinao Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tomoo Ogi
- Department of Genetics, Research Institute of Environmental Medicine (RIeM), Nagoya University, Nagoya, Japan
- Department of Human Genetics and Molecular Biology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masashi Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Chegini M, Eslami M, Motavaf M, Memarsadeghi O, Hoseini A, Torab E, Hoseininasab F, Amiri H, Ramandi S, Mostofinezhad N, Keivani F, Ghaffari SR, Rafati M. Whole exome sequencing identifies novel pathogenic variants in TGM1 and ALOX12B in patients with hereditary ichthyosis. Arch Dermatol Res 2023; 316:24. [PMID: 38060040 DOI: 10.1007/s00403-023-02775-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 10/25/2023] [Accepted: 11/09/2023] [Indexed: 12/08/2023]
Abstract
BACKGROUND Hereditary ichthyosis is a clinically and genetically heterogeneous disorder associated with more than 50 genes with TGM1, ALOX12B, and ALOXE3 being the most prevalent. Establishing an accurate diagnosis is important for effective genetic counseling and optimal patient management. OBJECTIVE We studied the diagnostic value of whole exome sequencing (WES) in a small case series with hereditary ichthyosis. METHODS During a 1-year period, index cases of 5 unrelated families clinically diagnosed with hereditary ichthyosis went through WES, followed by extensive segregation analysis. Prenatal diagnosis (PND) was conducted where indicated. RESULTS We identified 4 homozygous variants-2 in TGM1 (c.655A > G and c.797A > G) and 2 in ALOX12B (c.527 + 2 T > G and c.1654G > T)-alongside a heterozygous variant in TGM1 (c.428G > A) in 5 families. The variants were all pathogenic/likely pathogenic according to the ACMG classification and segregation analysis, except for c.797A > G in TGM1 which remained a variant of unknown clinical significance. Four variants were novel. All families were referred either during pregnancy or before reproductive planning; 4 benefited from WES as it identified the mutation in the probands and enabled carrier detection in at-risk relatives; PND was conducted in 2 families. CONCLUSION Our findings further support WES is a powerful tool for the comprehensive, accurate, and rapid molecular diagnosis of hereditary ichthyosis and can offer opportunities for reproductive planning, carrier screening and prenatal diagnosis to at-risk families.
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Affiliation(s)
- Mitra Chegini
- Department of Genetics, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- Applied Biotechnology Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Maryam Eslami
- Department of Genetics, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- Applied Biotechnology Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mahsa Motavaf
- Functional Neurosurgery Research Center, Shohada Tajrish Neurosurgical Comprehensive Center of Excellence, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Omid Memarsadeghi
- Applied Biotechnology Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Azadeh Hoseini
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran
| | - Elnaz Torab
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran
| | - Fatemeh Hoseininasab
- Department of Reproductive Genetics, Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran
| | - Hosna Amiri
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran
| | - Somayeh Ramandi
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran
| | - Niusha Mostofinezhad
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran
| | - Fatane Keivani
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran
| | - Saeed Reza Ghaffari
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran.
- Department of Reproductive Genetics, Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
- Department of Genomics, Gene Clinic, Tehran, Iran.
| | - Maryam Rafati
- Department of Genomics, Fetal Health Research Center, Hope Generation Foundation, Tehran, Iran.
- Department of Reproductive Genetics, Reproductive Biotechnology Research Center, Avicenna Research Institute, ACECR, Tehran, Iran.
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Rossel SVJ, Clabbers JMK, Steijlen PM, van den Akker PC, Spuls PI, Middelkamp Hup MA, van Maarle MC, Vreeburg M, Bolling MC, van Geel M, Gostyński A. Expanding the molecular and clinical spectrum of autosomal recessive congenital ichthyosis caused by pathogenic variants in NIPAL4 and PNPLA1 and evaluation of novel therapeutic interventions. J Eur Acad Dermatol Venereol 2023; 37:e1405-e1409. [PMID: 37458571 DOI: 10.1111/jdv.19340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 07/10/2023] [Indexed: 07/25/2023]
Affiliation(s)
- S V J Rossel
- Department of Dermatology, Expertise Centre for Genodermatoses, Maastricht University Medical Centre+, Maastricht, The Netherlands
- GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - J M K Clabbers
- Department of Dermatology, Expertise Centre for Genodermatoses, Maastricht University Medical Centre+, Maastricht, The Netherlands
- GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
- Department of Dermatology, Haga Hospital, The Hague, The Netherlands
| | - P M Steijlen
- Department of Dermatology, Expertise Centre for Genodermatoses, Maastricht University Medical Centre+, Maastricht, The Netherlands
- GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - P C van den Akker
- Department of Genetics, Expertise Centre for Genodermatoses, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - P I Spuls
- Department of Dermatology, Amsterdam Public Health/Infection and Immunology, University of Amsterdam, Amsterdam University Medical Centre, Amsterdam, The Netherlands
| | - M A Middelkamp Hup
- Department of Dermatology, Amsterdam Public Health/Infection and Immunology, University of Amsterdam, Amsterdam University Medical Centre, Amsterdam, The Netherlands
| | - M C van Maarle
- Department of Human Genetics, Amsterdam University Medical Centres, Amsterdam, The Netherlands
| | - M Vreeburg
- Department of Clinical Genetics, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - M C Bolling
- Department of Dermatology, Expertise Centre for Genodermatoses, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - M van Geel
- Department of Dermatology, Expertise Centre for Genodermatoses, Maastricht University Medical Centre+, Maastricht, The Netherlands
- GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
- Department of Clinical Genetics, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - A Gostyński
- Department of Dermatology, Expertise Centre for Genodermatoses, Maastricht University Medical Centre+, Maastricht, The Netherlands
- GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
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10
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Niu X, Li X, Han Q, Hou R, Zhang K. Long-term survival of harlequin ichthyosis in two siblings with novel ABCA12 mutations. Int J Dermatol 2023; 62:e639-e641. [PMID: 37602715 DOI: 10.1111/ijd.16812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 07/16/2023] [Accepted: 08/04/2023] [Indexed: 08/22/2023]
Affiliation(s)
- Xuping Niu
- Shanxi Key Laboratory of Stem Cells for Immunological Dermatosis, Institute of Dermatology, Taiyuan Central Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xinhua Li
- Shanxi Key Laboratory of Stem Cells for Immunological Dermatosis, Institute of Dermatology, Taiyuan Central Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Qixin Han
- Shanxi Key Laboratory of Stem Cells for Immunological Dermatosis, Institute of Dermatology, Taiyuan Central Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ruixia Hou
- Shanxi Key Laboratory of Stem Cells for Immunological Dermatosis, Institute of Dermatology, Taiyuan Central Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Kaiming Zhang
- Shanxi Key Laboratory of Stem Cells for Immunological Dermatosis, Institute of Dermatology, Taiyuan Central Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
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11
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Liu Z, Jing C. Two- and three-dimensional sonographic findings of harlequin ichthyosis: case report and literature review. An Bras Dermatol 2023; 98:806-813. [PMID: 37355352 PMCID: PMC10589490 DOI: 10.1016/j.abd.2022.09.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/24/2022] [Accepted: 09/30/2022] [Indexed: 06/26/2023] Open
Abstract
BACKGROUND Harlequin ichthyosis (HI) is a rare skin disorder with extremely high lethality due to a mutation of the ABCA12 gene. Because of its rarity and the often-late onset, prenatal screening for HI is extremely difficult, and most pregnant women might easily miss the period for optimal examinations. OBJECTIVE To summarize the sonographic features of HI for prenatal diagnostic purposes. METHODS The authors describe a case of HI with no family history who was diagnosed by using prenatal ultrasound scanning. The sonographic features of HI and the clinical characteristics of pregnant women were summarized by searching relevant literature over nearly two decades. RESULTS The unique sonographic presentations including peeling skin, clenched hands and clubfeet, ectropion, flat nose, fetal growth impairment, polyhydramnios and echogenic amniotic fluid may be primarily related to skin disorders in HI fetuses. The authors also identified a novel pathogenic ABCA12 gene mutation and explained the possible pathogenic mechanisms. STUDY LIMITATIONS Caution should be exercised in summarizing disease characteristics because of the small number of cases, and the authors are faced with the possibility of incomplete case searching. CONCLUSIONS HI has relatively unique sonographic features. Therefore, 2D-ultrasound combined with 3D-ultrasound may be an effective method for the prenatal diagnosis of HI. Moreover, a novel pathogenic ABCA12 gene mutation may provide important clues for future research on the etiology of HI. However, the authors consider that additional studies are needed to provide more evidence for prenatal diagnosis.
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Affiliation(s)
- Zesi Liu
- Department of Gynecology and Obstetrics, The First Affiliated Hospital Dalian Medical University, Dalian, China
| | - Chunli Jing
- Department of Ultrasound of Gynecology and Obstetrics, The Second Affiliated Hospital Dalian Medical University, Dalian, China.
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12
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Challamel C, Hernandez-Martin A, Tchitchiama C, Jonca N, Rossel SVJ, Gostyński A, Mazereeuw-Hautier J. Patients with autosomal recessive congenital ichthyosis present a distinctive pattern of alopecia. J Eur Acad Dermatol Venereol 2023; 37:e1274-e1276. [PMID: 37306217 DOI: 10.1111/jdv.19246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 05/30/2023] [Indexed: 06/13/2023]
Affiliation(s)
- C Challamel
- CHU Toulouse, Reference Center for Rare Skin Diseases, Department of Dermatology, Hôpital Larrey, CHU Toulouse, Toulouse, France
| | | | - C Tchitchiama
- CHU Toulouse, Reference Center for Rare Skin Diseases, Department of Dermatology, Hôpital Larrey, CHU Toulouse, Toulouse, France
| | - N Jonca
- Infinity, University of Toulouse, CNRS, INSERM, Université Paul Sabatier, Toulouse, France
- CHU Toulouse, Hôpital Purpan, Laboratoire de Biologie Cellulaire et Cytologie, Institut Fédératif de Biologie, Toulouse, France
| | - S V J Rossel
- Department of Dermatology, Maastricht University Medical Center, The Netherlands and European Reference Network - Skin, Maastricht, The Netherlands
| | - A Gostyński
- Department of Dermatology, Maastricht University Medical Center, The Netherlands and European Reference Network - Skin, Maastricht, The Netherlands
| | - J Mazereeuw-Hautier
- CHU Toulouse, Reference Center for Rare Skin Diseases, Department of Dermatology, Hôpital Larrey, CHU Toulouse, Toulouse, France
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13
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Macriz-Romero N, Vera-Duarte GR, Guerrero-Becerril J, Chacón-Camacho OF, Astiazarán MC, Zenteno JC, Graue-Hernandez EO. Ophthalmic findings in patients with autosomal recessive lamellar ichthyosis due to TGM1 mutations in an isolated population. Int Ophthalmol 2023; 43:3659-3665. [PMID: 37542530 PMCID: PMC10504104 DOI: 10.1007/s10792-023-02774-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 06/22/2023] [Indexed: 08/07/2023]
Abstract
PURPOSE To describe the ocular clinical characteristics of a group of Mexican patients with lamellar ichthyosis (LI) arising from TGM1 pathogenic variants. METHODS Ophthalmological exploration, pedigree analysis and genetic screening were performed in patients with an established clinical diagnosis of lamellar ichthyosis from families located in a small community in the Southeast of Mexico. RESULTS Nine patients with LI in five families were identified. There were six affected females. All patients (9/9) demonstrated eye lid abnormalities with eight patients showing lid margin abnormalities. Madarosis was present in only three individuals and corneal scarring was documented in two. All nine individuals carried biallelic TGM1 variants, either homozygously or as compound heterozygous. CONCLUSION Ocular anomalies are common in individuals with TGM1-related LI. The occurrence of a variety of private or rare mutations hampers the identification of a genotype-phenotype correlation for ocular anomalies in this disorder.
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Affiliation(s)
- Nicole Macriz-Romero
- Department of Cornea, External Disease and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca #14, Colonia Obrera, Cuauhtémoc, 06800, Mexico City, Mexico
| | - Guillermo Raul Vera-Duarte
- Department of Cornea, External Disease and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca #14, Colonia Obrera, Cuauhtémoc, 06800, Mexico City, Mexico
| | - Jesus Guerrero-Becerril
- Department of Cornea, External Disease and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca #14, Colonia Obrera, Cuauhtémoc, 06800, Mexico City, Mexico
| | - Oscar Francisco Chacón-Camacho
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
- Iztacala Faculty of Superior Studies, National Autonomous University of Mexico (UNAM), Mexico City, Mexico
| | - Mirena C Astiazarán
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
| | - Juan Carlos Zenteno
- Department of Genetics, Institute of Ophthalmology "Conde de Valenciana", Mexico City, Mexico
- Biochemistry Department, Faculty Medicine, National Autonomous University of Mexico, Mexico City, Mexico
- Rare Diseases Diagnostic Unit, Faculty of Medicine, National Autonomous University of Mexico (UNAM), Mexico City, Mexico
| | - Enrique O Graue-Hernandez
- Department of Cornea, External Disease and Refractive Surgery, Institute of Ophthalmology "Conde de Valenciana", Chimalpopoca #14, Colonia Obrera, Cuauhtémoc, 06800, Mexico City, Mexico.
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14
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Zhu S, Jiang Y, Shen N, Yin H, Qiao J. Case report of self-improving collodion ichthyosis in the newborn. J Int Med Res 2023; 51:3000605231204491. [PMID: 37848341 PMCID: PMC10585991 DOI: 10.1177/03000605231204491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 09/13/2023] [Indexed: 10/19/2023] Open
Abstract
Self-improving collodion ichthyosis (SICI) is a relatively rare subtype of autosomal recessive congenital ichthyosis (ARCI) that is often characterized by a collodion baby (CB) phenotype at birth. A newborn girl, just 1 hour old, presented with taut, shiny, thick yellow crusts, like parchment, and scales on her trunk and upper limbs. The tightening effect had caused both upper eyelids to appear everted, and her lips and auricles were deformed. Based on whole-exome sequencing and examination of the clinical phenotype, the patient was diagnosed with ARCI. After admission, the exposed mucosa was covered with a sterile Vaseline gauze dressing, and she was placed in an incubator set to a temperature of 32°C with a humidity level of 75%. One week later, the parchment-like scales had begun to flake off, and at the age of 3 weeks, all bodily skin appeared normal. SICI was diagnosed. After discharge, the patient was followed up to 3 months of age, at which time her growth and development were comparable to those of her peers. Clinicians should consider SICI as a possible diagnosis when analyzing the prognosis of patients with CB. Reducing water loss and maintaining the electrolyte balance are particularly important for SICI treatment.
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Affiliation(s)
- Suyue Zhu
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Yazhou Jiang
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Nan Shen
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Hanjun Yin
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
| | - Jibing Qiao
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu, China
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15
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Terrinoni A, Sala G, Bruno E, Pitolli C, Minieri M, Pieri M, Gambacurta A, Campione E, Belardi R, Bernardini S. Partial Loss of Function ABCA12 Mutations Generate Reduced Deposition of Glucosyl-Ceramide, Leading to Patchy Ichthyosis and Erythrodermia Resembling Erythrokeratodermia Variabilis et Progressiva (EKVP). Int J Mol Sci 2023; 24:13962. [PMID: 37762265 PMCID: PMC10530436 DOI: 10.3390/ijms241813962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/25/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
Ichthyoses are genetically determined cornification disorders of the epidermis characterized by the presence of different degrees of scaling, hyperkeratosis, and erythroderma often associated with palmoplantar keratoderma. Different classifications of these diseases have been proposed, often based upon the involved genes and/or the clinical presentation. The clinical features of these diseases present some overlap of phenotypes among distinct genetic entities, depending mainly on the penetrance of mutations. In this study, using a clinical, genetic, and molecular approach, we analyzed a family with two affected members who had clinical and histological features resembling erythrokeratodermia variabilis (EKV) or a type of erythrodermic hyperkeratosis with palmoplantar keratoderma. Despite of the clinical presentation, we demonstrated that the affected patients were genetically double heterozygous for two different mutations in the ABCA12 gene, known to be responsible for harlequin ichthyosis. To explain the mild phenotype of our patients, we performed a molecular characterization of the skin. In the upper layers of the epidermis, the results showed a patchy presence of the glucosyl-ceramides (GlcCer), which is the lipid transported by ABCA12, fundamental in contributing to skin impermeability. Indeed, the two mutations detected do not completely abolish ABCA12 activity, indicating that the mild phenotype is due to a partial loss of function of the enzyme, thus giving rise to an intermediate phenotype resembling EKVP, due to a partial depletion of GlcCer deposition.
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Affiliation(s)
- Alessandro Terrinoni
- Department of Experimental Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (G.S.); (M.M.); (M.P.); (A.G.); (R.B.); (S.B.)
| | - Gabriele Sala
- Department of Experimental Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (G.S.); (M.M.); (M.P.); (A.G.); (R.B.); (S.B.)
| | - Ernesto Bruno
- Department of Clinical Sciences and Translational Medicine University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy;
| | - Consuelo Pitolli
- Department of Neuroscience, Section of Human Anatomy, Catholic University of the Sacred Heart, Largo Francesco Vito 1, 00168 Rome, Italy;
| | - Marilena Minieri
- Department of Experimental Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (G.S.); (M.M.); (M.P.); (A.G.); (R.B.); (S.B.)
| | - Massimo Pieri
- Department of Experimental Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (G.S.); (M.M.); (M.P.); (A.G.); (R.B.); (S.B.)
| | - Alessandra Gambacurta
- Department of Experimental Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (G.S.); (M.M.); (M.P.); (A.G.); (R.B.); (S.B.)
| | - Elena Campione
- Department of System Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy;
| | - Riccardo Belardi
- Department of Experimental Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (G.S.); (M.M.); (M.P.); (A.G.); (R.B.); (S.B.)
| | - Sergio Bernardini
- Department of Experimental Medicine, University of Tor Vergata, Via Montpellier 1, 00133 Rome, Italy; (G.S.); (M.M.); (M.P.); (A.G.); (R.B.); (S.B.)
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16
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Luu Y, Pithadia DJ, Teng J, Khuu P. Ichthyosis, cataracts, and motor delay in an infant: A case of Chanarin-Dorfman syndrome. Pediatr Dermatol 2023; 40:879-881. [PMID: 36709747 DOI: 10.1111/pde.15258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 01/03/2023] [Indexed: 01/30/2023]
Abstract
Chanarin-Dorfman syndrome (CDS) is a rare, autosomal recessive disorder of impaired triacylglycerol catabolism leading to cytoplasmic deposition of triglycerides in various cell types. We describe the case of an 8-month-old boy with cataracts, strabismus, motor delays, and an ichthyosiform rash since birth. Genetic testing revealed a pathogenic variant of the ABHD5 gene, suggestive of CDS, and further workup demonstrated hepatic steatosis and myopathy. His ichthyosis improved with initiation of a diet low in very long-chain fatty acids and medium-chain fatty acid supplementation.
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Affiliation(s)
- Yen Luu
- University of Missouri-Kansas City School of Medicine, Kansas City, Missouri, USA
| | - Deeti J Pithadia
- Division of Pediatric Dermatology, Department of Dermatology, Lucile Packard Children's Hospital, Stanford University School of Medicine, Stanford, California, USA
| | - Joyce Teng
- Division of Pediatric Dermatology, Department of Dermatology, Lucile Packard Children's Hospital, Stanford University School of Medicine, Stanford, California, USA
| | - Phuong Khuu
- Division of Pediatric Dermatology, Department of Dermatology, Lucile Packard Children's Hospital, Stanford University School of Medicine, Stanford, California, USA
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17
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Deng W, Liu R, Chen M, Zhu G, Wang Y. A novel mutation compounded with a known mutation in TGM1 associated with severe lamellar ichthyosis and intellectual disability. Eur J Dermatol 2023; 33:426-428. [PMID: 37823494 DOI: 10.1684/ejd.2023.4512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Affiliation(s)
- Weiping Deng
- Department of Dermatology and Venereology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences),Southern Medical University, Guangzhou 510080,China
| | - Ruihong Liu
- Department of Experimental Medicine, Fifth Affiliated Hospital, SunYat-sen University, Zhuhai 519000, China
| | - Mingwei Chen
- Reproductive Medicine Center, The Third Affiliated Hospital of Guangzhou Medical University,Guangzhou 510150,China
| | - Guoxing Zhu
- Department of Dermatology and Venereology, The Third Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510630, China
| | - Yimimg Wang
- The 5th Affiliated Hospital, Sun Yat Sun University, Zhuhai, 519000, PR China
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18
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Takeichi T, Ito Y, Lee JYW, Murase C, Okuno Y, Muro Y, McGrath JA, Akiyama M. KLK11 ichthyosis: large truncal hyperkeratotic pigmented plaques underscore a distinct autosomal dominant disorder of cornification. Br J Dermatol 2023; 189:134-136. [PMID: 37212630 DOI: 10.1093/bjd/ljad082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/07/2023] [Accepted: 03/15/2023] [Indexed: 05/23/2023]
Abstract
Recently, Gong et al. reported two substitutions, p.(Gly50Glu) and p.(Gly50Arg), located at the last amino acid of the estimated signal peptide in kallikrein11 (KLK11) in three independent ichthyosiform erythroderma or erythrokeratoderma pedigrees (Gong et al., Br J Dermatol, 2023). Here, we present a further case of autosomal dominant congenital ichthyosiform erythroderma caused by the p.(Gly50Glu) substitution in KLK11; the patient had sharply demarcated pigmented hyperkeratotic lesions. Thus, p.(Gly50Glu) in KLK11 might represent a recurrent variant underlying this recently reported autosomal dominant disorder of cornification, and the large hyperkeratotic pigmented plaques seen in all patients may represent a pathognomonic part of the phenotype.
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Affiliation(s)
- Takuya Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasutoshi Ito
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - John Y W Lee
- St John's Institute of Dermatology, King's College London, Guy's Hospital, London, UK
| | - Chiaki Murase
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Okuno
- Department of Virology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Yoshinao Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - John A McGrath
- St John's Institute of Dermatology, King's College London, Guy's Hospital, London, UK
| | - Masashi Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
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19
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Meyer JM, Boeglin WE, Brash AR. Recombinant PNPLA1 catalyzes the synthesis of acylceramides and acyl acids with selective incorporation of linoleic acid. J Lipid Res 2023; 64:100379. [PMID: 37087101 PMCID: PMC10209018 DOI: 10.1016/j.jlr.2023.100379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 04/24/2023] Open
Abstract
Loss-of-function mutations in patatin-like phospholipase domain-containing protein 1 (PNPLA1) cause autosomal recessive congenital ichthyosis, and altered PNPLA1 activity is implicated in the pathogenesis of atopic dermatitis and other common skin diseases. To examine the hypothesis that PNPLA1 catalyzes the synthesis of acylceramides and acyl acids, we expressed and partially purified a soluble, truncated form of PNPLA1 in Escherichia coli, (PNPLA1trun) along with the related protein PNPLA2 (ATGL, adipose triglyceride lipase) and coactivator CGI-58. Liposomal substrates were incubated with recombinant enzymes for 0.5-24 h and products analyzed by HPLC-UV and LC-MS. Using trilinolein or dilinolein substrates, PNPLA1trun, like ATGLtrun, catalyzed lipolysis and acyltransferase reactions with 2-30% conversion into linoleic acid, monolinolein, and trilinolein. CGI-58 enhanced ATGL-catalyzed lipolysis as previously reported, but transacylase activity was not enhanced with ATGL or PNPLA1. In matching the proposed activity in vivo, PNPLA1 catalyzed acyl transfer from trilinolein and dilinolein donors to omega-hydroxy ceramide, omega-hydroxy glucosylceramide, and omega-hydroxy acid acceptors to form acylceramide, glucosyl-acylceramide, and acyl acid, respectively, albeit with only ∼0.05% conversion of the substrates. Notably, in experiments comparing dilinolein vs. diolein acyl donors, PNPLA1 transferred linoleate with 3:1 selectivity over oleate into acylceramide. These results support the role for PNPLA1 in the synthesis of acylceramides and acyl acids in epidermis and suggest that the enrichment of these lipids with linoleic acid could result from the substrate selectivity of PNPLA1.
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Affiliation(s)
- Jason M Meyer
- Department of Dermatology, Vanderbilt University Medical Center, Nashville, TN, USA; Dermatology Service, Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, TN, USA.
| | - William E Boeglin
- Department of Pharmacology, Vanderbilt University, Nashville, TN, USA
| | - Alan R Brash
- Department of Pharmacology, Vanderbilt University, Nashville, TN, USA.
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20
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Frommherz L, Komlosi K, Hewel C, Kopp J, Dewenter M, Zimmer A, Bartsch O, Linke M, Technau-Hafsi K, Gerber S, Fischer J, Has C. Acral lamellar ichthyosis with amino acid substitution in the C-terminus of keratin 2. J Eur Acad Dermatol Venereol 2023; 37:817-822. [PMID: 36331357 DOI: 10.1111/jdv.18719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND Most cases of hereditary ichthyoses present with generalized scaling and skin dryness. However, in some cases skin involvement is restricted to particular body regions as in acral lamellar ichthyosis. OBJECTIVES We report on the genetic basis of acral ichthyosis in two families presenting with a similar phenotype. METHODS Genetic testing was performed by targeted next generation sequencing and whole-exome sequencing. For identity-by-descent analysis, the parents were genotyped and data analysis was performed with the Chromosome Analysis Suite Software. RT-PCR with RNA extracted from skin samples was used to analyse the effect of variants on splicing. RESULTS Genetic testing identified a few heterozygous variants, but only the variant in KRT2 c.1912 T > C, p.Phe638Leu segregated with the disease and remained the strongest candidate. Pairwise identity-by-descent analysis revealed no indication of family relationship. Phenylalanine 638 is the second last amino acid upstream of the termination codon in the tail of K2, and substitution to leucine is predicted as probably damaging. Assessment of the variant is difficult, in part due to the lack of crystal structures of this region. CONCLUSIONS Altogether, we show that a type of autosomal dominant acral ichthyosis is most probably caused by an amino acid substitution in the C-terminus of keratin 2.
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Affiliation(s)
- Leonie Frommherz
- Department of Dermatology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Department of Dermatology and Allergy, Ludwig-Maximilians-Universität München (LMU) Munich, University Hospital, Munich, Germany
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Charlotte Hewel
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Julia Kopp
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Malin Dewenter
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Andreas Zimmer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Oliver Bartsch
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Matthias Linke
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Kristin Technau-Hafsi
- Department of Dermatology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Susanne Gerber
- Institute of Human Genetics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
- Computational Systems Genomics Group, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Judith Fischer
- Institute of Human Genetics, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Cristina Has
- Department of Dermatology, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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21
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Hotz A, Kopp J, Bourrat E, Oji V, Süßmuth K, Komlosi K, Bouadjar B, Tantcheva-Poór I, Hellström Pigg M, Betz RC, Giehl K, Schedel F, Weibel L, Schulz S, Stölzl DV, Tadini G, Demiral E, Berggard K, Zimmer AD, Alter S, Fischer J. Mutational Spectrum of the ABCA12 Gene and Genotype–Phenotype Correlation in a Cohort of 64 Patients with Autosomal Recessive Congenital Ichthyosis. Genes (Basel) 2023; 14:genes14030717. [PMID: 36980989 PMCID: PMC10048568 DOI: 10.3390/genes14030717] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/10/2023] [Accepted: 03/12/2023] [Indexed: 03/17/2023] Open
Abstract
Autosomal recessive congenital ichthyosis (ARCI) is a non-syndromic congenital disorder of cornification characterized by abnormal scaling of the skin. The three major phenotypes are lamellar ichthyosis, congenital ichthyosiform erythroderma, and harlequin ichthyosis. ARCI is caused by biallelic mutations in ABCA12, ALOX12B, ALOXE3, CERS3, CYP4F22, NIPAL4, PNPLA1, SDR9C7, SULT2B1, and TGM1. The most severe form of ARCI, harlequin ichthyosis, is caused by mutations in ABCA12. Mutations in this gene can also lead to congenital ichthyosiform erythroderma or lamellar ichthyosis. We present a large cohort of 64 patients affected with ARCI carrying biallelic mutations in ABCA12. Our study comprises 34 novel mutations in ABCA12, expanding the mutational spectrum of ABCA12-associated ARCI up to 217 mutations. Within these we found the possible mutational hotspots c.4541G>A, p.(Arg1514His) and c.4139A>G, p.(Asn1380Ser). A correlation of the phenotype with the effect of the genetic mutation on protein function is demonstrated. Loss-of-function mutations on both alleles generally result in harlequin ichthyosis, whereas biallelic missense mutations mainly lead to CIE or LI.
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Affiliation(s)
- Alrun Hotz
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
| | - Julia Kopp
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Emmanuelle Bourrat
- Department of Dermatology, Reference Center for Rare Skin Diseases MAGEC, Saint Louis Hospital AP-HP, 75015 Paris, France
| | - Vinzenz Oji
- European Reference Networks (ERN Skin), 75015 Paris, France
- Department of Dermatology and Venereology, Muenster University Medical Center, 48149 Muenster, Germany
| | - Kira Süßmuth
- Department of Dermatology and Venereology, Muenster University Medical Center, 48149 Muenster, Germany
| | - Katalin Komlosi
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
| | - Bakar Bouadjar
- Department of Dermatology, CHU of Bab-El-Oued Algiers, Algiers 16008, Algeria
| | - Iliana Tantcheva-Poór
- Department of Dermatology and Venereology, Faculty of Medicine and University Hospital, University of Cologne, 50937 Cologne, Germany
| | | | - Regina C. Betz
- Institute of Human Genetics, University of Bonn, Medical Faculty & University Hospital Bonn, 53127 Bonn, Germany
| | - Kathrin Giehl
- European Reference Networks (ERN Skin), 75015 Paris, France
- Department of Dermatology, Venerology und Allergology, University Hospital of Munich, 80337 Munich, Germany
| | - Fiona Schedel
- Department of Dermatology and Venereology, Muenster University Medical Center, 48149 Muenster, Germany
| | - Lisa Weibel
- Pediatric Skin Center, Dermatology Department, University Children’s Hospital Zurich, 8032 Zurich, Switzerland
| | - Solveig Schulz
- Synlab Medical Practice for Human Genetics Jena, 07747 Jena, Germany
| | - Dora V. Stölzl
- Center for Inflammatory Skin Diseases, Department of Dermatology and Allergy, University Hospital Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
| | - Gianluca Tadini
- European Reference Networks (ERN Skin), 75015 Paris, France
- Pediatric Dermatology Unit, Department of Pathophysiology and Transplantation, Fondazione IRCCS Ca’ Granda—Ospedale Maggiore Policlinico, University of Milan, 20122 Milan, Italy
| | - Emine Demiral
- Department of Medical Genetics, Inonu University School of Medicine, 44280 Malatya, Turkey
| | - Karin Berggard
- Department of Dermatology and Venereology, Skåne University Hospital, 221 85 Lund, Sweden
| | - Andreas D. Zimmer
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
| | - Svenja Alter
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
| | - Judith Fischer
- Institute of Human Genetics, Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany
- Center for Cornification Disorders, Freiburg Center for Rare Diseases, Medical Center, University of Freiburg, 79106 Freiburg, Germany
- European Reference Networks (ERN Skin), 75015 Paris, France
- Correspondence: ; Tel.: +49-(0)761-270-70510; Fax: +49-(0)761-270-70410
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Almazroea A, Ijaz A, Aziz A, Mushtaq Yasinzai M, Rafiullah R, Rehman FU, Daud S, Shaikh R, Ayub M, Wali A. Identification and In Silico Analysis of a Homozygous Nonsense Variant in TGM1 Gene Segregating with Congenital Ichthyosis in a Consanguineous Family. Medicina (Kaunas) 2023; 59:103. [PMID: 36676727 PMCID: PMC9866252 DOI: 10.3390/medicina59010103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/25/2022] [Accepted: 12/28/2022] [Indexed: 01/04/2023]
Abstract
Background and Objectives: Lamellar ichthyosis is a rare skin disease characterized by large, dark brown plate-like scales on the entire body surface with minimum or no erythema. This phenotype is frequently associated with a mutation in the TGM1 gene, encoding the enzyme transglutaminase 1 which plays a catalytic role in the formation of the cornified cell envelop. The present study aimed to carry out clinical and genetic characterization of the autosomal recessive lamellar ichthyosis family from Balochistan. Materials and Methods: A consanguineous family with lamellar ichthyosis was enrolled from Balochistan, Pakistan. PCR amplification of all the exons and splice site junctions of the TGM1 gene followed by Sanger sequencing was performed on the genomic DNA. The identified variant was checked by In silico prediction tools to evaluate the effect of the variant on protein. Results: Sanger sequencing identified a homozygous nonsense variant c.131G >A (p.Trp44*) in the TGM1 gene that segregated in the autosomal recessive mode of inheritance in the family. The identified variant results in premature termination of transcribed mRNA and is predicted to cause a truncated or absent translation product transglutaminase-1 (TGase-1) accompanied by loss of catalytic activity, causing a severe clinical phenotype of lamellar ichthyosis in the patients. Conclusions: Here, we report a consanguineous lamellar ichthyosis family with a homozygous nonsense variant in the TGM1 gene. The variant is predicted as pathogenic by different In silico prediction tools.
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Affiliation(s)
- Abdulhadi Almazroea
- Pediatrician, Associate Professor at College of Medicine, Taibah University, Madinah 41477, Saudi Arabia
| | - Ambreen Ijaz
- Department of Biotechnology, Faculty of Life Sciences & Informatics, BUITEMS, Quetta 87300, Pakistan
- Department of Zoology, SBK Women’s University, Quetta 87500, Pakistan
| | - Abdul Aziz
- Department of Computer Sciences and Bioinformatics, Khushal Khan Khattak University, Karak 27200, Pakistan
| | - Muhammad Mushtaq Yasinzai
- Department of Biotechnology, Faculty of Life Sciences & Informatics, BUITEMS, Quetta 87300, Pakistan
| | - Rafiullah Rafiullah
- Department of Biotechnology, Faculty of Life Sciences & Informatics, BUITEMS, Quetta 87300, Pakistan
| | - Fazal Ur Rehman
- Department of Microbiology, University of Balochistan, Quetta 87550, Pakistan
| | - Shakeela Daud
- Department of Biotechnology, Faculty of Life Sciences & Informatics, BUITEMS, Quetta 87300, Pakistan
| | - Rozeena Shaikh
- Department of Biotechnology, Faculty of Life Sciences & Informatics, BUITEMS, Quetta 87300, Pakistan
| | - Muhammad Ayub
- Institute of Biochemistry, University of Balochistan, Quetta 87550, Pakistan
| | - Abdul Wali
- Department of Biotechnology, Faculty of Life Sciences & Informatics, BUITEMS, Quetta 87300, Pakistan
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23
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Teng JMC, Bunick CG, Guenthner S, Murrell DF, Marathe K, Kempers S, Eads K, Mendelsohn AM, Raiz J, Tavakkol A, Castelo-Soccio L. The CONTROL study: A randomized, double-blind vehicle-controlled phase 2b study of novel topical isotretinoin formulation demonstrates improvement in recessive X-linked and autosomal recessive lamellar congenital ichthyosis. J Am Acad Dermatol 2022; 87:1455-1458. [PMID: 35872261 DOI: 10.1016/j.jaad.2022.07.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 06/28/2022] [Accepted: 07/09/2022] [Indexed: 11/19/2022]
Affiliation(s)
- Joyce M C Teng
- Department of Dermatology, School of Medicine, Stanford University, Palo Alto, California
| | - Christopher G Bunick
- Department of Dermatology, Yale University School of Medicine, New Haven, Connecticut.
| | - Scott Guenthner
- The Dermatology Center of Indiana, Plainfield, Indiana; The Indiana Clinical Trials Center, PC, Plainfield, Indiana
| | - Dedee F Murrell
- Department of Dermatology, University of New South Wales, School of Medicine, Sydney, New South Wales, Australia
| | - Kalyani Marathe
- Division of Dermatology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Steven Kempers
- Associated Skin Care Specialists, New Brighton, Minnesota
| | - Kimmie Eads
- The Indiana Clinical Trials Center, PC, Plainfield, Indiana
| | | | - Jessica Raiz
- Timber Pharmaceuticals, Basking Ridge, New Jersey
| | | | - Leslie Castelo-Soccio
- Division of Pediartics and Dermatology, University of Pennsylvania, Perelman School of Medicine and Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
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24
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Tham KC, Lefferdink R, Duan K, Lim SS, Wong XFCC, Ibler E, Wu B, Abu-Zayed H, Rangel SM, Del Duca E, Chowdhury M, Chima M, Kim HJ, Lee B, Guttman-Yassky E, Paller AS, Common JEA. Distinct skin microbiome community structures in congenital ichthyosis. Br J Dermatol 2022; 187:557-570. [PMID: 35633118 PMCID: PMC10234690 DOI: 10.1111/bjd.21687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 03/28/2022] [Accepted: 05/21/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND The ichthyoses are rare genetic keratinizing disorders that share the characteristics of an impaired epidermal barrier and increased risk of microbial infections. Although ichthyotic diseases share a T helper (Th) 17 cell immune signature, including increased expression of antimicrobial peptides, the skin microbiota of ichthyoses is virtually unexplored. OBJECTIVES To analyse the metagenome profile of skin microbiome for major congenital ichthyosis subtypes. METHODS Body site-matched skin surface samples were collected from the scalp, upper arm and upper buttocks of 16 healthy control participants and 22 adult patients with congenital forms of ichthyosis for whole metagenomics sequencing analysis. RESULTS Taxonomic profiling showed significant shifts in bacteria and fungi abundance and sporadic viral increases across ichthyosis subtypes. Cutibacterium acnes and Malassezia were significantly reduced across body sites, consistent with skin barrier disruption and depletion of lipids. Microbial richness was reduced, with specific increases in Staphylococcus and Corynebacterium genera, as well as shifts in fungal species, including Malassezia. Malassezia globosa was reduced at all body sites, whereas M. sympodialis was reduced in the ichthyotic upper arm and upper buttocks. Malassezia slooffiae, by contrast, was strikingly increased at all body sites in participants with congenital ichthyosiform erythroderma (CIE) and lamellar ichthyosis (LI). A previously undescribed Trichophyton species was also detected as sporadically colonizing the skin of patients with CIE, LI and epidermolytic ichthyosis subtypes. CONCLUSIONS The ichthyosis skin microbiome is significantly altered from healthy skin with specific changes predominating among ichthyosis subtypes. Skewing towards the Th17 pathway may represent a response to the altered microbial colonization in ichthyosis. What is already known about this topic? The skin microbiome of congenital ichthyoses is largely unexplored. Microbes play an important role in pathogenesis, as infections are common. The relative abundances of staphylococci and corynebacteria is increased in the cutaneous microbiome of patients with Netherton syndrome, but extension of these abundances to all congenital ichthyoses is unexplored. What does this study add? A common skin microbiome signature was observed across congenital ichthyoses. Distinct microbiome features were associated with ichthyosis subtypes. Changes in microbiome may contribute to T helper 17 cell immune polarization. What is the translational message? These data provide the basis for comparison of the microbiome with lipidomic and transcriptomic alterations in these forms of ichthyosis and consideration of correcting the dysbiosis as a therapeutic intervention.
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Affiliation(s)
- Khek-Chian Tham
- A*STAR Skin Research Labs, Agency for Science, Technology and Research, 8A Biomedical Grove, #06-10 Immunos, Singapore, 138648, Singapore
| | - Rachel Lefferdink
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Kaibo Duan
- Singapore Immunology Network, Agency for Science, Technology and Research, 8A Biomedical Grove, #03 Immunos, Singapore, 138648, Singapore
| | - Seong Soo Lim
- A*STAR Skin Research Labs, Agency for Science, Technology and Research, 8A Biomedical Grove, #06-10 Immunos, Singapore, 138648, Singapore
| | - X F Colin C Wong
- A*STAR Skin Research Labs, Agency for Science, Technology and Research, 8A Biomedical Grove, #06-10 Immunos, Singapore, 138648, Singapore
| | - Erin Ibler
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Benedict Wu
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Hajar Abu-Zayed
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Ester Del Duca
- Icahn School of Medicine at Mount Sinai Medical Center, New York, NY, USA
| | - Mashkura Chowdhury
- Icahn School of Medicine at Mount Sinai Medical Center, New York, NY, USA
| | - Margot Chima
- Icahn School of Medicine at Mount Sinai Medical Center, New York, NY, USA
| | - Hee Jee Kim
- Icahn School of Medicine at Mount Sinai Medical Center, New York, NY, USA
| | - Bernett Lee
- Singapore Immunology Network, Agency for Science, Technology and Research, 8A Biomedical Grove, #03 Immunos, Singapore, 138648, Singapore
| | | | - Amy S Paller
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - John E A Common
- A*STAR Skin Research Labs, Agency for Science, Technology and Research, 8A Biomedical Grove, #06-10 Immunos, Singapore, 138648, Singapore
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25
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Kim M, Mikhaylov D, Rangel SM, Pavel AB, He H, Renert-Yuval Y, Del Duca E, Malik K, Huynh T, Ibler E, Sun M, Zhang N, Estrada Y, Krueger J, Paller AS, Guttman-Yassky E. Transcriptomic Analysis of the Major Orphan Ichthyosis Subtypes Reveals Shared Immune and Barrier Signatures. J Invest Dermatol 2022; 142:2363-2374.e18. [PMID: 35421402 PMCID: PMC10234672 DOI: 10.1016/j.jid.2022.03.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 12/30/2022]
Abstract
Preliminary work suggested upregulation of inflammatory pathways in patients with common forms of ichthyosis. However, a comprehensive characterization of skin from various ichthyosis subtypes is unavailable, precluding the development of targeted treatments. Thus, we sought to characterize the immune and barrier profiles of common and subtype-specific skin transcriptomes in a large group of patients with ichthyosis. We performed a global RNA-sequencing analysis in 54 patients with ichthyosis (7 with Netherton syndrome, 13 with epidermolytic ichthyosis, 16 with lamellar ichthyosis, and 18 with congenital ichthyosiform erythroderma) and 40 healthy controls. Differentially expressed genes were defined on the basis of fold changes > 2 and false discovery rate < 0.05 criteria. We found robust and significant T helper (Th) 22/Th17 skewing in all subtypes (e.g., IL-17A/C/F, S100A7/8/9/12; P < 0.001) with modest changes in Th2 pathway, primarily in Netherton syndrome, and Th1 skewing in congenital ichthyosiform erythroderma. Across all subtypes (less evident in epidermolytic ichthyosis), lipid metabolism and barrier junction markers were downregulated (e.g., FA2H, CDH10/11/12/2; P < 0.05), whereas epidermal cornification and proliferation measures were upregulated (e.g., SPRR1A/1B/2C/2G, EREG; P < 0.05). Our findings suggest that the common ichthyosis variants share aberrations in Th17/Th22 and barrier function, with minimal Th2 modulation. This may help to elucidate the pathogeneses of these subtypes and inform the development of subtype-specific treatments.
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Affiliation(s)
- Madeline Kim
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Daniela Mikhaylov
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Stephanie M Rangel
- Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Ana B Pavel
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA; Department of Biomedical Engineering, The University of Mississippi, Oxford, Mississippi, USA
| | - Helen He
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Yael Renert-Yuval
- Laboratory of Investigative Dermatology, The Rockefeller University, New York, New York, USA
| | - Ester Del Duca
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA; Department of Dermatology, Magna Graecia University of Catanzaro, Catanzaro, Italy
| | - Kunal Malik
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Thy Huynh
- Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Erin Ibler
- Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Mary Sun
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ning Zhang
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Yeriel Estrada
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - James Krueger
- Laboratory of Investigative Dermatology, The Rockefeller University, New York, New York, USA
| | - Amy S Paller
- Department of Dermatology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Emma Guttman-Yassky
- Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
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26
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Li D, Deng M, Liao P, Song Y. [Clinical and genetic analysis of a patient with autosomal recessive congenital ichthyosis due to compound heterozygous variants of ALOX12B gene]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2022; 39:321-324. [PMID: 35315045 DOI: 10.3760/cma.j.cn511374-20210526-00442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To explore the clinical and genetic characteristics of a pediatric patient suspected for Autosomal Recessive Congenital Ichthyosis (ARCI). METHODS Clinical data of the patient was analyzed. Peripheral blood samples were collected from the patient and his parents for the extraction of genomic DNA. Next-generation sequencing (NGS) was then carried out. Candidate variants were confirmed by Sanger sequencing. A variety of bioinformatic tools including Mutation Taster, PROVEAN, and PolyPhen2 were used to predict the pathogenicity of the variants based on guidelines from the American College of Medical Genetics and Genomics (ACMG). RESULTS The patient, a 1-month-and-7-day-old male, had presented with cutaneous erythema and fine scaling of the whole body. NGS revealed that he has harbored compound heterozygous variants c.1579G>A (p.Val527Met) (paternal) and c.923T>C (p.Leu308Pro) (maternal) of the ALOX12B gene. The former was known to be likely pathogenic, while the latter was unreported previously and categorized as "likely pathogenic" based on the ACMG guidelines. Based on the clinical and genetic findings, the patient was diagnosed with ARCI. CONCLUSION The c.1579G>A and c.923T>C variants of the ALOX12B genes probably underlay the ARCI in this patient. Above finding has enriched the spectrum of ALOX12B mutations and enabled molecular diagnosis of the patient, based on which genetic counseling and prenatal diagnosis may be provided.
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Affiliation(s)
- Dan Li
- Department of Pediatrics, the First Affiliated Hospital of Jinan University, Guangzhou, Guangdong 510630, China.
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27
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Kiener S, Wiener DJ, Hopke K, Diesel AB, Jagannathan V, Mauldin EA, Casal ML, Leeb T. ABHD5 frameshift deletion in Golden Retrievers with ichthyosis. G3 (Bethesda) 2022; 12:6428539. [PMID: 34791225 PMCID: PMC9210301 DOI: 10.1093/g3journal/jkab397] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Accepted: 11/05/2021] [Indexed: 11/16/2022]
Abstract
Ichthyoses are hereditary skin disorders characterized by the formation of scales and defects in the outermost layer of the epidermis. In dogs, at least six different breed-specific ichthyoses including a relatively common PNPLA1-related autosomal recessive ichthyosis in Golden Retrievers are known. In this study, we investigated 14 Golden Retrievers with scales that were not homozygous for the mutant PNPLA1 allele suggesting a genetically distinct new form of ichthyosis. Histopathological examinations showed lamellar, orthokeratotic hyperkeratosis, and mildly hyperplastic epidermis that led to the diagnosis of a nonepidermolytic ichthyosis. Combined linkage and homozygosity mapping in 14 cases and 30 nonaffected family members delimited a critical interval of ∼12.7 Mb on chromosome 23. Whole-genome sequencing of an affected dog revealed a single protein-changing variant within this region that was not present in 795 control genomes. The identified variant is a 14 bp deletion in the ABHD5 gene (c.1006_1019del), leading to a frameshift and altering the last 14 codons p.(Asp336Serfs*6). The genotypes at this variant showed perfect cosegregation with the ichthyosis phenotype in a large family comprising 14 cases and 72 controls. ABHD5 encodes an acyltransferase required for lipid metabolism. In humans, variants in ABHD5 cause Chanarin-Dorfman syndrome, a neutral lipid storage disease with ichthyosis. Our data in dogs together with the knowledge on the effects of ABHD5 variants in humans strongly suggest ABHD5:c.1006_1019del as candidate causative genetic variant for a new canine form of ichthyosis, which we propose to designate as Golden Retriever ichthyosis type 2 (ICH2).
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Affiliation(s)
- Sarah Kiener
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
- Dermfocus, University of Bern, Bern 3001, Switzerland
| | - Dominique J Wiener
- Department of Veterinary Pathobiology, Texas A&M University, College of Veterinary Medicine and Biomedical Sciences, College Station, TX 77843-4467, USA
| | - Kaitlin Hopke
- Department of Small Animal Clinical Sciences, Texas A&M University, College of Veterinary Medicine and Biomedical Sciences, College Station, TX 77843-4474, USA
| | - Alison B Diesel
- Department of Small Animal Clinical Sciences, Texas A&M University, College of Veterinary Medicine and Biomedical Sciences, College Station, TX 77843-4474, USA
| | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
| | - Elizabeth A Mauldin
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Margret L Casal
- Department of Clinical Sciences and Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tosso Leeb
- Corresponding author: Institute of Genetics, University of Bern, Bremgartenstrasse 109a, 3001 Bern, Switzerland.
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28
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Jacinto JGP, Häfliger IM, Veiga IMB, Letko A, Gentile A, Drögemüller C. A frameshift insertion in FA2H causes a recessively inherited form of ichthyosis congenita in Chianina cattle. Mol Genet Genomics 2021; 296:1313-1322. [PMID: 34599683 PMCID: PMC8550120 DOI: 10.1007/s00438-021-01824-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 09/23/2021] [Indexed: 01/14/2023]
Abstract
The aim of this study was to characterize the phenotype and to identify the genetic etiology of a syndromic form of ichthyosis congenita (IC) observed in Italian Chianina cattle and to estimate the prevalence of the deleterious allele in the population. Sporadic occurrence of different forms of ichthyosis including IC have been previously reported in cattle. However, so far, no causative genetic variant has been found for bovine IC. Nine affected cattle presenting congenital xerosis, hyperkeratosis and scaling of the skin as well as urolithiasis and cystitis associated with retarded growth were examined. Skin histopathology revealed a severe, diffuse orthokeratotic hyperkeratosis with mild to moderate epidermal hyperplasia. The pedigree records indicated a monogenic recessive trait. Homozygosity mapping and whole-genome sequencing allowed the identification of a homozygous frameshift 1 bp insertion in the FA2H gene (c.9dupC; p.Ala4ArgfsTer142) located in a 1.92 Mb shared identical-by-descent region on chromosome 18 present in all cases, while the parents were heterozygous as expected for obligate carriers. These findings enable the selection against this sub-lethal allele showing an estimated frequency of ~ 7.5% in Chianina top sires. A sporadic incidence of mild clinical signs in the skin of heterozygous carriers was observed. So far, pathogenic variants affecting the encoded fatty acid 2-hydroxylase catalyzing the synthesis of 2-hydroxysphingolipids have been associated with myelin disorders. In conclusion, this study represents the first report of an FA2H-related autosomal recessive inherited skin disorder in a mammalian species and adds FA2H to the list of candidate genes for ichthyosis in humans and animals. Furthermore, this study provides a DNA-based diagnostic test that enables selection against the identified pathogenic variant in the Chianina cattle population. However, functional studies are needed to better understand the expression of FA2H in IC-affected Chianina cattle.
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Affiliation(s)
- Joana G. P. Jacinto
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, 40064 Bologna, Italy
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
| | - Irene M. Häfliger
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
| | - Inês M. B. Veiga
- Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland
| | - Anna Letko
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
| | - Arcangelo Gentile
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano Emilia, 40064 Bologna, Italy
| | - Cord Drögemüller
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland
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29
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Kim MR, Oji V, Valentin F, Traupe H, Nofer JR, Hausser I, Hennies HC, Eckl K, Wudy SA, Sánchez-Guijo A, Kerschke L, Fischer J, Süßmuth K. Vitamin D Status in Distinct Types of Ichthyosis: Importance of Genetic Type and Severity of Scaling. Acta Derm Venereol 2021; 101:adv00546. [PMID: 34396419 PMCID: PMC9425607 DOI: 10.2340/00015555-3887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Data on vitamin D status of patients with inherited ichthyosis in Europe is scarce and unspecific concerning the genetic subtype. This study determined serum levels of 25-hydroxyvitamin D3 (25(OH)D3) in 87 patients with ichthyosis; 69 patients were additionally analysed for parathyroid hormone. Vitamin D deficiency was pronounced in keratinopathic ichthyosis (n = 17; median 25(OH)D3: 10.5 ng/ml), harlequin ichthyosis (n = 2;7.0 ng/ml) and rare syndromic sub-types (n = 3; 7.0 ng/ml). Vitamin D levels were reduced in TG1-proficient lamellar ichthyosis (n = 15; 8.9 ng/ml), TG1-deficient lamellar ichthyosis (n = 12; 11.7 ng/ml), congenital ichthyosiform erythroderma (n = 13; 12.4 ng/ml), Netherton syndrome (n = 7; 10.7 ng/ml) and X-linked ichthyosis (n = 8; 13.9 ng/ml). In ichthyosis vulgaris 25(OH)D3 levels were higher (n = 10; 19.7 ng/ml). Parathyroid hormone was elevated in 12 patients. Low 25(OH)D3 levels were associated with high severity of scaling (p = 0.03) implicating scaling as a risk factor for vitamin D deficiency. Thus, this study supports our recent guidelines for ichthyoses, which recommend screening for and substituting of vitamin D deficiency.
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Affiliation(s)
- Mi-Ran Kim
- Department of Dermatology, University of Münster, Münster, Germany
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30
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Abeni D, Rotunno R, Diociaiuti A, Giancristoforo S, Bonamonte D, Filoni A, Schepis C, Siragusa M, Neri I, Virdi A, Castiglia D, Zambruno G, Bodemer C, El Hachem M. The Burden of Autosomal Recessive Congenital Ichthyoses on Patients and their Families: An Italian Multicentre Study. Acta Derm Venereol 2021; 101:adv00477. [PMID: 33954798 PMCID: PMC9380281 DOI: 10.2340/00015555-3822] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Autosomal recessive congenital ichthyoses (ARCI) are characterized by generalized skin scaling, hyperkeratosis, erythroderma, and disabling features affecting the skin (palmoplantar keratoderma, fissures, pain, itch), eyes, ears, and joints. Disease severity and chronicity, patient disfigurement, and time and costs required for care impose a major burden on quality of life. This multicentre cross-sectional study investigated the impact of ARCI on quality of life of patients and families, using the Dermatology Life Quality Index (DLQI), the Children DLQI (CDLQI) and Family Burden of Ichthyosis (FBI) questionnaires. Disease severity was assessed by a dermatologist. A total of 94 patients were recruited, of whom 52 (55.3%) children. Mean age was 20.1 (median 13.5) years. The mean CDLQI/DLQI score was 7.8, and 21 patients scored >10, indicating a major impairment in quality of life: symptoms, feelings and treatment problems were the most affected domains of quality of life. FBI showed a major repercussion on psychological factors and work. The results of this study highlight the impact of ARCI on specific aspects of patient and family life, underlining the need for psychological support.
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Affiliation(s)
- Damiano Abeni
- IDI-IRCCS (Istituto Dermopatico dell'Immacolata-Istituto di Ricovero e Cura a Carattere Scientifico, Dermatological Research Hospital), Via Monti di Creta 104, IT-00167 Rome, Italy
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Mazereeuw-Hautier J, Bourrat E, Tournier E, Battistella M, Bernabeu-Wittel J, Barbarot S, Hernández-Martín Á. Chronic Ulceration of the Scalp Associated with Genetically Different Types of Congenital Ichthyosis: A Series of Four Cases. Acta Derm Venereol 2021; 101:adv00408. [PMID: 33313938 PMCID: PMC9366501 DOI: 10.2340/00015555-3720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Juliette Mazereeuw-Hautier
- Dermatology Department, Reference Center for Rare Skin Diseases, CHU Larrey, Université Paul Sabatier, FR-31000 Toulouse, France. E-mail:
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Li H, Qiao L. [Analysis of PNPLA1 gene mutation in a child with ichthyosis]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2020; 37:1136-1138. [PMID: 32924119 DOI: 10.3760/cma.j.cn511374-20191028-00546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
OBJECTIVE To explore the genetic basis for a child with ichthyosis. METHODS High-throughput sequencing was carried out to detect genomic copy number variants (CNVs) and variant of the medical exome. Candidate variant was verified by Sanger sequencing. RESULTS No disease-related CNV was identified in the patient. High-throughput sequencing revealed that the child has carried compound heterozygous variants of the PNPLA1 gene, including a previously known pathogenic c.100G>A (p.Ala34Thr) mutation and a novel c.56C>A (p.Ser19x) variant which was predicted to be a pathogenic according to the ACMG guidelines. Sanger sequencing confirmed both variants in the child. Her father and mother were found to be heterozygous carriers for the c.56C>A (p.Ser19x) and c.100G>A (p.Ala34Thr) variants, respectively. CONCLUSION The compound heterozygous c.100G>A and c.56C>A variants of the PNPLA1 gene probably underlay the ichthyosis in this child.
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Affiliation(s)
- Han Li
- Zhongda Hospital Affiliated to Southeast University, Nanjing, Jiangsu 210009, China.
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Tani N, Yamada N, Okazaki T, Horie T, Nakano H, Sawamura D, Yamamoto O. Novel TGM1 Gene Mutation in a Japanese Patient with Bathing Suit Ichthyosis. Acta Derm Venereol 2020; 100:adv00285. [PMID: 32965503 PMCID: PMC9274925 DOI: 10.2340/00015555-3643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Affiliation(s)
- Naomi Tani
- Division of Dermatology, Department of Medicine of Sensory and Motor Organs, Faculty of Medicine, Tottori University, 683-8504 Yonago, Japan. E-mail:
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Esperón-Moldes U, Ginarte-Val M, Rodríguez-Pazos L, Fachal L, Martín-Santiago A, Vicente A, Jiménez-Gallo D, Guillén-Navarro E, Sampol LM, González-Enseñat MA, Vega A. Novel CYP4F22 mutations associated with autosomal recessive congenital ichthyosis (ARCI). Study of the CYP4F22 c.1303C>T founder mutation. PLoS One 2020; 15:e0229025. [PMID: 32069299 PMCID: PMC7028276 DOI: 10.1371/journal.pone.0229025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Accepted: 01/28/2020] [Indexed: 11/18/2022] Open
Abstract
Mutations in CYP4F22 cause autosomal recessive congenital ichthyosis (ARCI). However, less than 10% of all ARCI patients carry a mutation in CYP4F22. In order to identify the molecular basis of ARCI among our patients (a cohort of ninety-two Spanish individuals) we performed a mutational analysis using direct Sanger sequencing in combination with a multigene targeted NGS panel. From these, eight ARCI families (three of them with Moroccan origin) were found to carry five different CYP4F22 mutations, of which two were novel. Computational analysis showed that the mutations found were present in highly conserved residues of the protein and may affect its structure and function. Seven of the eight families were carriers of a highly recurrent CYP4F22 variant, c.1303C>T; p.(His435Tyr). A 12Mb haplotype was reconstructed in all c.1303C>T carriers by genotyping ten microsatellite markers flanking the CYP4F22 gene. A prevalent 2.52Mb haplotype was observed among Spanish carrier patients suggesting a recent common ancestor. A smaller core haplotype of 1.2Mb was shared by Spanish and Moroccan families. Different approaches were applied to estimate the time to the most recent common ancestor (TMRCA) of carrier patients with Spanish origin. The age of the mutation was calculated by using DMLE and BDMC2. The algorithms estimated that the c.1303C>T variant arose approximately 2925 to 4925 years ago, while Spanish carrier families derived from a common ancestor who lived in the XIII century. The present study reports five CYP4F22 mutations, two of them novel, increasing the number of CYP4F22 mutations currently listed. Additionally, our results suggest that the recurrent c.1303C>T change has a founder effect in Spanish population and c.1303C>T carrier families originated from a single ancestor with probable African ancestry.
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Affiliation(s)
- Uxia Esperón-Moldes
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
- Departamento de Ciencias Forenses, Anatomía Patolóxica, Xinecoloxía, Obstetricia e Pediatría, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Manuel Ginarte-Val
- Dermatology Service of Complexo Hospitalario Universitario de Santiago, Santiago de Compostela, Spain
| | | | - Laura Fachal
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
| | - Ana Martín-Santiago
- Dermatology Service of Hospital Universitari Son Espases, Palma de Mallorca, Spain
| | - Asunción Vicente
- Dermatology Service of Hospital Sant Joan de Déu, Barcelona, Spain
| | | | | | | | | | - Ana Vega
- Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
- * E-mail:
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Wang Y, Norum M, Oehl K, Yang Y, Zuber R, Yang J, Farine JP, Gehring N, Flötenmeyer M, Ferveur JF, Moussian B. Dysfunction of Oskyddad causes Harlequin-type ichthyosis-like defects in Drosophila melanogaster. PLoS Genet 2020; 16:e1008363. [PMID: 31929524 PMCID: PMC6980720 DOI: 10.1371/journal.pgen.1008363] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 01/24/2020] [Accepted: 12/17/2019] [Indexed: 01/04/2023] Open
Abstract
Prevention of desiccation is a constant challenge for terrestrial organisms. Land insects have an extracellular coat, the cuticle, that plays a major role in protection against exaggerated water loss. Here, we report that the ABC transporter Oskyddad (Osy)-a human ABCA12 paralog-contributes to the waterproof barrier function of the cuticle in the fruit fly Drosophila melanogaster. We show that the reduction or elimination of Osy function provokes rapid desiccation. Osy is also involved in defining the inward barrier against xenobiotics penetration. Consistently, the amounts of cuticular hydrocarbons that are involved in cuticle impermeability decrease markedly when Osy activity is reduced. GFP-tagged Osy localises to membrane nano-protrusions within the cuticle, likely pore canals. This suggests that Osy is mediating the transport of cuticular hydrocarbons (CHC) through the pore canals to the cuticle surface. The envelope, which is the outermost cuticle layer constituting the main barrier, is unaffected in osy mutant larvae. This contrasts with the function of Snu, another ABC transporter needed for the construction of the cuticular inward and outward barriers, that nevertheless is implicated in CHC deposition. Hence, Osy and Snu have overlapping and independent roles to establish cuticular resistance against transpiration and xenobiotic penetration. The osy deficient phenotype parallels the phenotype of Harlequin ichthyosis caused by mutations in the human abca12 gene. Thus, it seems that the cellular and molecular mechanisms of lipid barrier assembly in the skin are conserved during evolution.
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Affiliation(s)
- Yiwen Wang
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, China
| | - Michaela Norum
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
| | - Kathrin Oehl
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
| | - Yang Yang
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
| | - Renata Zuber
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
- Applied Zoology, Technical University of Dresden, Dresden, Germany
| | - Jing Yang
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
| | - Jean-Pierre Farine
- Centre des Sciences du Goût et de l'Alimentation, UMR-CNRS 6265, Université de Bourgogne, Dijon, France
| | - Nicole Gehring
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
| | - Matthias Flötenmeyer
- Microscopy Unit, Max-Planck-Institut für Entwicklungsbiologie, Tübingen, Germany
| | - Jean-François Ferveur
- Centre des Sciences du Goût et de l'Alimentation, UMR-CNRS 6265, Université de Bourgogne, Dijon, France
| | - Bernard Moussian
- Section Animal Genetics, Interfaculty Institute of Cell Biology, University of Tübingen, Tübingen, Germany
- Institute of Biology Valrose, CNRS, Inserm, Université Côte d’Azur, Nice, France
- * E-mail:
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Esperón-Moldes U, Ginarte Val M, Rodríguez-Pazos L, Fachal L, Azaña JM, Barberá Fons M, Viejo Diaz M, Vega A. Novel and Recurrent PNPLA1 Mutations in Spanish Patients with Autosomal Recessive Congenital Ichthyosis; Evidence of a Founder Effect. Acta Derm Venereol 2019; 99:894-898. [PMID: 31120544 DOI: 10.2340/00015555-3227] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Autosomal recessive congenital ichthyosis (ARCI) is a group of rare non-syndrome diseases that affect cornification. PNPLA1 is one of the 12 related genes identified so far. Mutation screening of this gene has resulted in the identification of 13 individuals, from 10 families, who carried 7 different PNPLA1 mutations. These mutations included 2 missense, 2 frame-shift and 3 nonsense, 3 of them being novel. One of the identified variants, c.417_418delinsTC, was highly prevalent, as it was found in 6 out of 10 (60%) of our ARCI families with PNPLA1 mutations. Clinical manifestations varied significantly among patients, but altered sweating; erythema, palmar hyperlinearity and small whitish scales in flexor-extensor and facial areas were common symptoms. Haplotype analyses of c.417_418delinsTC carriers confirmed the existence of a common ancestor. This study expands the spectrum of the PNPLA1 disease, which causes variants and demonstrates that the c.417_418delinsTC mutation has founder effects in the Spanish population.
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Affiliation(s)
- Uxia Esperón-Moldes
- Molecular Medicine, Fundación Pública Galega de Medicina Xenómica-SERGAS, Grupo de Medicina Xenómica-USC, CIBERER, IDIS, Santiago de Compostela, Spain
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Andersen LHJ, Kelstrup L, Olsen TE, Dunø M, Jørgensen FS. [Harlequin ichthyosis with a diaphragmatic hernia and a new mutation]. Ugeskr Laeger 2018; 180:V01180078. [PMID: 30187851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Harlequin ichthyosis (HI) is a rare and severe form of the autosomal recessive congenital ichthyosis. This is a case report of a 30-year-old healthy woman with a pregnancy resulting in preterm birth of a child with severe HI, who did not survive. At the autopsy, the child was found with HI and a diaphragmatic hernia of the Bochdalek type. Genetic analysis showed, that the child was homozygous for the mutation c.5121_5124del in ABCA12. The parents were related and were found heterozygous of this mutation. This clinical presentation with this new mutation has not been described in the literature before.
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Han R, Duan L, Wu S, Liu X. [Analysis of TGM1 gene mutation in a collodion baby]. Zhonghua Yi Xue Yi Chuan Xue Za Zhi 2018; 35:265-267. [PMID: 29653007 DOI: 10.3760/cma.j.issn.1003-9406.2018.02.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To explore the genetic cause for a Uyghur Chinese child with collodion skin. METHODS G-banded chromosomal karyotyping was carried out for the child and his parents. High-throughput sequencing for 25 genes related to ichthyosis and ichthyosiform dermatosis was also performed for the child. RESULTS No karyotypic abnormality was found in the child and his parents. High-throughput sequencing has detected in the patient a previously described pathogenic mutation c.919C>T (p.Arg307Trp) and a novel c.856C>T (p.Arg286Trp) mutation in the TGM1 gene. By Sanger sequencing, the child was verified to have carried both mutations. His father was found to be a heterozygous carrier of the c.856C>T (p.Arg286Trp) mutation, while neither mutation was found in the mother. CONCLUSION Congenital ichthyosis associated with the TGM1 gene may show an autosomal recessive inheritance. The collodion condition of the child is probably due to the compound heterozygous mutations of the TGM1 gene.
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Affiliation(s)
- Rui Han
- Laboratory of Prenatal Diagnostic Center, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, China.
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Chao K, Aleshin M, Goldstein Z, Worswick S, Hogeling M. Lamellar ichthyosis in a female neonate without a collodion membrane. Dermatol Online J 2018; 24:13030/qt24g7w9t8. [PMID: 29630152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 03/02/2018] [Indexed: 06/08/2023] Open
Abstract
The term, autosomal recessive congenital ichthyosis (ARCI), describes a group of rare genetic skin diseases of cornification involving hyperkeratotic scaling at birth. The defective skin barrier function may lead to dehydration, body temperature instability, and high susceptibility to infections. In most cases of ARCI, neonates are born with a collodion membrane covering the body, often presenting with ectropion and eclabium. We report a premature female neonate presenting with hyperkeratotic scaling at birth without a collodion membrane. She was managed with placement in a humidified isolette, prophylactic antibiotics, dilute bleach baths, petrolatum ointment, and artificial eye drops. By the fourth week of life, there was marked improvement in her skin with the large, brown, plate-like scales on the trunk and extremities becoming lighter in color and finer in appearance. The ichthyosis genetic panel showed mutations in the ABCA12 gene resulting in the lamellar ichthyosis phenotype of ARCI. Our literature review revealed at least 28 patients with ARCI who were not born as collodion babies. Although collodion babies are a hallmark of most ARCI cases, clinicians should be aware of neonates with ARCI born without a collodion membrane and expedite appropriate workup and treatment.
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Affiliation(s)
| | | | | | | | - Marcia Hogeling
- Department of Medicine, Division of Dermatology, David Geffen School of Medicine at UCLA, Los Angeles, California.
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Abstract
PURPOSE To describe the ophthalmic manifestations in a series of children with congenital lamellar ichthyosis. These cases presented with varying types of eyelid abnormality associated with the systemic disease. The clinical features and ophthalmic management were studied. METHODS The case histories of three children presenting to the oculoplastic clinic were reviewed. All were diagnosed with congenital lamellar ichthyosis and under the care of the Dermatology department. Family history and pedigree analysis was performed to determine mode of genetic inheritance. Ocular examination for visual acuity, eyelid and eyelash malposition, lid function and closure were carried out. Corneal examination including tests for exposure was also done. RESULTS All three patients had eyelid position abnormalities from the systemic disease. There was no clinical evidence of conjunctival involvement. One patient required full thickness skin grafts to treat corneal exposure secondary to lower lid ectropion. One had mild lower lid ectropion but without corneal exposure. The third case had the unusual finding of inward turning of the anterior lamella of the upper eyelid with a marked lash ptosis and only mild ectropion of the lower lid. CONCLUSIONS Congenital lamellar ichthyosis is a heterogeneous disorder with phenotypic variability. The most common eyelid abnormality is cicatricial ectropion of the upper and mainly lower eyelids. Most cases are managed conservatively although in severe cases secondary corneal exposure may require surgical correction. In this condition, to the best of our knowledge, the tendency for the eyelids to turn inwards has not previously been described.
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Affiliation(s)
- A J Singh
- Department of Ofhthalmology, Leeds General Infirmary, Leeds, England.
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Affiliation(s)
- Kristine A U Pallesen
- Department of Dermatology and Allergy Centre, Odense University Hospital, DK-5000 Odense C, Denmark.
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Ugezu CH, Mazumdar A, Dunn E, Das A. Harlequin Ichthyosis - A Case Report. Ir Med J 2017; 110:606. [PMID: 29341518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Harlequin Ichthyosis is a very rare genetic disorder affecting mainly the skin with severe morbidity and mortality. It affects both sexes with incidence of about 1 in 300,000 live births. Autosomal recessive inheritance has been inferred with mutation in ABCA 12 gene identified. Hence, genetic counseling and mutation screening of this gene should be considered in at-risk patients. Death usually occurred in the first 3 months of life due to sepsis, feeding problems and respiratory distress. With improved neonatal care and early introduction of retinoids, its survival rate has increased.
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Affiliation(s)
- C H Ugezu
- Department of Obstetrics and Gynaecology, Wexford General Hospital, Newtown Road. Wexford
| | - A Mazumdar
- Department of Obstetrics and Gynaecology, Wexford General Hospital, Newtown Road. Wexford
| | - E Dunn
- Department of Obstetrics and Gynaecology, Wexford General Hospital, Newtown Road. Wexford
| | - A Das
- Department of Obstetrics and Gynaecology, Wexford General Hospital, Newtown Road. Wexford
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Takeichi T, Okuno Y, Saito C, Kojima D, Kono M, Morita A, Sugiura K, Akiyama M. Congenital Ichthyosis and Recurrent Eczema Associated with a Novel ALOXE3 Mutation. Acta Derm Venereol 2017; 97:532-533. [PMID: 27868147 DOI: 10.2340/00015555-2549] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Takuya Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
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Gruber R, Rogerson C, Windpassinger C, Banushi B, Straatman-Iwanowska A, Hanley J, Forneris F, Strohal R, Ulz P, Crumrine D, Menon GK, Blunder S, Schmuth M, Müller T, Smith H, Mills K, Kroisel P, Janecke AR, Gissen P. Autosomal Recessive Keratoderma-Ichthyosis-Deafness (ARKID) Syndrome Is Caused by VPS33B Mutations Affecting Rab Protein Interaction and Collagen Modification. J Invest Dermatol 2017; 137:845-854. [PMID: 28017832 PMCID: PMC5358661 DOI: 10.1016/j.jid.2016.12.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 11/30/2016] [Accepted: 12/02/2016] [Indexed: 12/21/2022]
Abstract
In this paper, we report three patients with severe palmoplantar keratoderma associated with ichthyosis and sensorineural deafness. Biallelic mutations were found in VPS33B, encoding VPS33B, a Sec1/Munc18 family protein that interacts with Rab11a and Rab25 proteins and is involved in trafficking of the collagen-modifying enzyme LH3. Two patients were homozygous for the missense variant p.Gly131Glu, whereas one patient was compound heterozygous for p.Gly131Glu and the splice site mutation c.240-1G>C, previously reported in patients with arthrogryposis renal dysfunction and cholestasis syndrome. We demonstrated the pathogenicity of variant p.Gly131Glu by assessing the interactions of the mutant VPS33B construct and its ability to traffic LH3. Compared with wild-type VPS33B, the p.Gly131Glu mutant VPS33B had reduced coimmunoprecipitation and colocalization with Rab11a and Rab25 and did not rescue LH3 trafficking. Confirming the cell-based experiments, we found deficient LH3-specific collagen lysine modifications in patients' urine and skin fibroblasts. Additionally, the epidermal ultrastructure of the p.Gly131Glu patients mirrored defects in tamoxifen-inducible VPS33B-deficient Vps33bfl/fl-ERT2 mice. Both patients and murine models revealed an impaired epidermal structure, ascribed to aberrant secretion of lamellar bodies, which are essential for epidermal barrier formation. Our results demonstrate that p.Gly131Glu mutant VPS33B causes an autosomal recessive keratoderma-ichthyosis-deafness syndrome.
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Key Words
- arc, arthrogryposis renal dysfunction and cholestasis
- arkid, autosomal recessive keratoderma-ichthyosis-deafness
- co-ip, co-immunoprecipitation
- corvet, core vacuole/endosome tethering
- hops, homotypic fusion and vacuole protein sorting
- lb, lamellar body
- mimcd3, murine inner medullary collecting duct 3
- ppk, palmoplantar keratoderma
- snp, single nucleotide polymorphism
- vws, vohwinkel syndrome
- wt, wild type
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Affiliation(s)
- Robert Gruber
- Department of Dermatology, Medical University of Innsbruck, Innsbruck, Austria; Division of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria
| | - Clare Rogerson
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK; Institute of Child Health, University College London, London, UK
| | | | - Blerida Banushi
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK; Institute of Child Health, University College London, London, UK
| | - Anna Straatman-Iwanowska
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK; Institute of Child Health, University College London, London, UK
| | - Joanna Hanley
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK; Institute of Child Health, University College London, London, UK
| | - Federico Forneris
- The Armenise-Harvard Laboratory of Structural Biology, Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Robert Strohal
- Department of Dermatology, Academic Teaching Hospital Feldkirch, Feldkirch, Austria
| | - Peter Ulz
- Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Debra Crumrine
- Department of Dermatology, Veterans Affairs Medical Center, University of California, San Francisco, California, USA
| | | | - Stefan Blunder
- Department of Dermatology, Medical University of Innsbruck, Innsbruck, Austria
| | - Matthias Schmuth
- Department of Dermatology, Medical University of Innsbruck, Innsbruck, Austria
| | - Thomas Müller
- Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria
| | - Holly Smith
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK
| | - Kevin Mills
- Institute of Child Health, University College London, London, UK
| | - Peter Kroisel
- Institute of Human Genetics, Medical University of Graz, Graz, Austria
| | - Andreas R Janecke
- Division of Human Genetics, Medical University of Innsbruck, Innsbruck, Austria; Department of Pediatrics I, Medical University of Innsbruck, Innsbruck, Austria.
| | - Paul Gissen
- MRC Laboratory for Molecular Cell Biology, University College London, London, UK; Institute of Child Health, University College London, London, UK; Inherited Metabolic Diseases Unit, Great Ormond Street Hospital, London, UK.
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45
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Lovric S, Goncalves S, Gee HY, Oskouian B, Srinivas H, Choi WI, Shril S, Ashraf S, Tan W, Rao J, Airik M, Schapiro D, Braun DA, Sadowski CE, Widmeier E, Jobst-Schwan T, Schmidt JM, Girik V, Capitani G, Suh JH, Lachaussée N, Arrondel C, Patat J, Gribouval O, Furlano M, Boyer O, Schmitt A, Vuiblet V, Hashmi S, Wilcken R, Bernier FP, Innes AM, Parboosingh JS, Lamont RE, Midgley JP, Wright N, Majewski J, Zenker M, Schaefer F, Kuss N, Greil J, Giese T, Schwarz K, Catheline V, Schanze D, Franke I, Sznajer Y, Truant AS, Adams B, Désir J, Biemann R, Pei Y, Ars E, Lloberas N, Madrid A, Dharnidharka VR, Connolly AM, Willing MC, Cooper MA, Lifton RP, Simons M, Riezman H, Antignac C, Saba JD, Hildebrandt F. Mutations in sphingosine-1-phosphate lyase cause nephrosis with ichthyosis and adrenal insufficiency. J Clin Invest 2017; 127:912-928. [PMID: 28165339 DOI: 10.1172/jci89626] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 12/12/2016] [Indexed: 12/24/2022] Open
Abstract
Steroid-resistant nephrotic syndrome (SRNS) causes 15% of chronic kidney disease cases. A mutation in 1 of over 40 monogenic genes can be detected in approximately 30% of individuals with SRNS whose symptoms manifest before 25 years of age. However, in many patients, the genetic etiology remains unknown. Here, we have performed whole exome sequencing to identify recessive causes of SRNS. In 7 families with SRNS and facultative ichthyosis, adrenal insufficiency, immunodeficiency, and neurological defects, we identified 9 different recessive mutations in SGPL1, which encodes sphingosine-1-phosphate (S1P) lyase. All mutations resulted in reduced or absent SGPL1 protein and/or enzyme activity. Overexpression of cDNA representing SGPL1 mutations resulted in subcellular mislocalization of SGPL1. Furthermore, expression of WT human SGPL1 rescued growth of SGPL1-deficient dpl1Δ yeast strains, whereas expression of disease-associated variants did not. Immunofluorescence revealed SGPL1 expression in mouse podocytes and mesangial cells. Knockdown of Sgpl1 in rat mesangial cells inhibited cell migration, which was partially rescued by VPC23109, an S1P receptor antagonist. In Drosophila, Sply mutants, which lack SGPL1, displayed a phenotype reminiscent of nephrotic syndrome in nephrocytes. WT Sply, but not the disease-associated variants, rescued this phenotype. Together, these results indicate that SGPL1 mutations cause a syndromic form of SRNS.
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Vahidnezhad H, Youssefian L, Saeidian AH, Zeinali S, Mansouri P, Sotoudeh S, Barzegar M, Mohammadi-Asl J, Karamzadeh R, Abiri M, McCormick K, Fortina P, Uitto J. Gene-Targeted Next Generation Sequencing Identifies PNPLA1 Mutations in Patients with a Phenotypic Spectrum of Autosomal Recessive Congenital Ichthyosis: The Impact of Consanguinity. J Invest Dermatol 2016; 137:678-685. [PMID: 27884779 DOI: 10.1016/j.jid.2016.11.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 10/25/2016] [Accepted: 11/07/2016] [Indexed: 12/19/2022]
Abstract
Autosomal recessive congenital ichthyosis is a heterogeneous group of disorders associated with mutations in at least nine distinct genes. To ascertain the molecular basis of ichthyosis patients in Iran, a country of approximately 80 million people with a high prevalence of customary consanguineous marriages, we have developed a gene-targeted next generation sequencing array consisting of 38 genes reported in association with ichthyosis phenotypes. In a subset of nine extended consanguineous families, we found homozygous missense mutations in the PNPLA1 gene, six of them being distinct and, to our knowledge, previously unpublished. This gene encodes an enzyme with lipid hydrolase activity, important for development and maintenance of the barrier function of the epidermis. These six mutations, as well as four previously published mutations, reside exclusively within the patatin-like subdomain of PNPLA1 containing the catalytic site. The mutations clustered around the active center of the enzyme or resided at the surface of the protein possibly involved in the protein-protein interactions. Clinical features of the patients showed considerable intra- and interfamilial heterogeneity. Knowledge of the specific mutations allows identification of heterozygous carriers, assisting in genetic counseling, prenatal testing, and preimplantation genetic diagnosis in extended families at risk of recurrence of this disorder, the incidence of which is significantly increased in consanguineous marriages.
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Affiliation(s)
- Hassan Vahidnezhad
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Biotechnology Research Center, Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran
| | - Leila Youssefian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Department of Medical Genetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Saeidian
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Sirous Zeinali
- Biotechnology Research Center, Department of Molecular Medicine, Pasteur Institute of Iran, Tehran, Iran; Kawsar Human Genetics Research Center, Tehran, Iran
| | - Parvin Mansouri
- Skin and Stem Cell Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Soheila Sotoudeh
- Department of Dermatology, Children's Medical Center, Center of Excellence, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Javad Mohammadi-Asl
- Department of Genetics, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Razieh Karamzadeh
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran; Department of Molecular Systems Biology, Cell Sciences Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Maryam Abiri
- Department of Medical Genetics, Tehran University of Medical Sciences, Tehran, Iran
| | - Kevin McCormick
- Sidney Kimmel Cancer Center, Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Paolo Fortina
- Sidney Kimmel Cancer Center, Department of Cancer Biology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Department of Molecular Medicine, Sapienza University, Rome, Italy
| | - Jouni Uitto
- Department of Dermatology and Cutaneous Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, USA; Jefferson Institute of Molecular Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA.
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47
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Hotz A, Oji V, Bourrat E, Jonca N, Mazereeuw-Hautier J, Betz RC, Blume-Peytavi U, Stieler K, Morice-Picard F, Schönbuchner I, Markus S, Schlipf N, Fischer J. Expanding the Clinical and Genetic Spectrum of KRT1, KRT2 and KRT10 Mutations in Keratinopathic Ichthyosis. Acta Derm Venereol 2016; 96:473-8. [PMID: 26581228 DOI: 10.2340/00015555-2299] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Twenty-six families with keratinopathic ichthyoses (epidermolytic ichthyosis, superficial epidermolytic ichthyosis or congenital reticular ichthyosiform erythroderma) were studied. Epidermolytic ichthyosis is caused by mutations in the genes KRT1 or KRT10, mutations in the gene KRT2 lead to superficial epidermolytic ichthyosis, and congenital reticular ichthyosiform erythroderma is caused by frameshift mutations in the genes KRT10 or KRT1, which lead to the phenomenon of revertant mosaicism. In this study mutations were found in KRT1, KRT2 and KRT10, including 8 mutations that are novel pathogenic variants. We report here the first case of a patient with congenital reticular ichthyosiform erythroderma carrying a mutation in KRT10 that does not lead to an arginine-rich reading frame. Novel clinical features found in patients with congenital reticular ichthyosiform erythroderma are described, such as mental retardation, spasticity, facial dysmorphisms, symblepharon and malposition of the 4th toe.
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Affiliation(s)
- Alrun Hotz
- Institute of Human Genetics, , University Medical Center Freiburg,, Freiburg, Germany
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48
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Kool ACM, Houtappel M, Filippini LHPM. [Not Available]. Ned Tijdschr Geneeskd 2016; 160:D190. [PMID: 27438390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A newborn had a tight, dry skin with multiple fissures, an eclabium and ectropion. Breathing was compromised and regulation of body temperature was impaired. We described the patient as a 'collodion baby'. After genetic investigation the diagnosis congenital ichtyosis, recessive type 1 was made. At 12 months of age, the skin symptoms were significantly diminished.
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Affiliation(s)
- A C M Kool
- VUmc, afd. Huisartsgeneeskunde, Amsterdam
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49
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Bilgili SG, Karadag AS, Calka O, Onder S, Bayram I. ICHTHYOSIS LINEARIS CIRCUMFLEXA: NOT ALWAYS A PART OF NETHERTON SYNDROME. Genet Couns 2016; 27:353-356. [PMID: 30204963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ichthyosis Linearis Circumfiexa (ILC) is a rarely seen autosomal recessive keratinization disorder and is characterized by erythematous, polycystic, plaques with 'double-edged' scales. Its histological features resemble psoriasis. A triad of ichthyosis (usually Ichthyosis Linearis Circumfiexa), trichorrhexis invaginata (a distinctive hair shaft disorder) and atopy is named as Netherton syndrome. Herein, we report a 12 year-old girl presenting with ILC not accompanied with typical atopy findings and hair shaft disorder.
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50
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Wang T, Xu C, Zhou X, Li C, Zhang H, Lian BQ, Lee JJ, Shen J, Liu Y, Lian CG. Homozygous ALOXE3 Nonsense Variant Identified in a Patient with Non-Bullous Congenital Ichthyosiform Erythroderma Complicated by Superimposed Bullous Majocchi's Granuloma: The Consequences of Skin Barrier Dysfunction. Int J Mol Sci 2015; 16:21791-801. [PMID: 26370990 PMCID: PMC4613280 DOI: 10.3390/ijms160921791] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/30/2015] [Accepted: 09/01/2015] [Indexed: 02/01/2023] Open
Abstract
Non-bullous congenital ichthyosiform erythroderma (NBCIE) is a hereditary disorder of keratinization caused by pathogenic variants in genes encoding enzymes important to lipid processing and terminal keratinocyte differentiation. Impaired function of these enzymes can cause pathologic epidermal scaling, significantly reduced skin barrier function. In this study, we have performed a focused, genetic analysis of a probrand affected by NBCIE and extended this to his consanguineous parents. Targeted capture and next-generation sequencing was performed on NBCIE associated genes in the proband and his unaffected consanguineous parents. We identified a homozygous nonsense variant c.814C>T (p.Arg272*) in ALOXE3 (NM_001165960.1) in the proband and discovered that his parents are both heterozygous carriers of the variant. The clinical manifestations of the proband’s skin were consistent with NBCIE, and detailed histopathological assessment revealed epidermal bulla formation and Majocchi’s granuloma. Infection with Trichophyton rubrum was confirmed by culture. The patient responded to oral terbinafine antifungal treatment. Decreased skin barrier function, such as that caused by hereditary disorders of keratinization, can increase the risk of severe cutaneous fungal infections and the formation of Majocchi’s granuloma and associated alopecia. Patients with NBCIE should be alerted to the possible predisposition for developing dermatophytoses and warrant close clinical follow-up.
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Affiliation(s)
- Tao Wang
- Department of Dermatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Chenchen Xu
- Department of Dermatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Xiping Zhou
- Department of Dermatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Chunjia Li
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
| | - Hongbing Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
| | - Bill Q Lian
- Department of Medicine, University of Massachusetts, Worcester, MA 01655, USA.
| | - Jonathan J Lee
- Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA.
| | - Jun Shen
- Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA.
| | - Yuehua Liu
- Department of Dermatology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China.
| | - Christine Guo Lian
- Department of Pathology, Brigham & Women's Hospital, Harvard Medical School, 221 Longwood Ave. EBRC 401, Boston, MA 02115, USA.
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