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Jan H, Wasif N, Naqvi SKUH, Ullah I, Ahmad W. A novel homozygous splice site variant in CERS3 causes autosomal recessive congenital ichthyosis. Congenit Anom (Kyoto) 2023. [PMID: 37128664 DOI: 10.1111/cga.12518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 02/19/2023] [Accepted: 03/22/2023] [Indexed: 05/03/2023]
Affiliation(s)
- Hamadia Jan
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
| | - Naveed Wasif
- Institute of Human Genetics, Ulm University and Ulm University Medical Center, Ulm, Germany
- Institute of Human Genetics, University Hospital Schleswig-Holstein, Kiel, Germany
| | | | - Imran Ullah
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
| | - Wasim Ahmad
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
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Takeichi T, Ohno Y, Tanahashi K, Ito Y, Shiraishi K, Utsunomiya R, Yoshida S, Ikeda K, Nomura H, Morizane S, Sayama K, Ogi T, Muro Y, Kihara A, Akiyama M. Ceramide Analysis in Combination With Genetic Testing May Provide a Precise Diagnosis for Self-Healing Collodion Babies. J Lipid Res 2022; 63:100308. [PMID: 36332686 DOI: 10.1016/j.jlr.2022.100308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 10/12/2022] [Accepted: 10/14/2022] [Indexed: 11/05/2022] Open
Abstract
Self-healing collodion baby (SHCB), also called "self-improving collodion baby", is a rare mild variant of autosomal recessive congenital ichthyosis and is defined as a collodion baby who shows the nearly complete resolution of scaling within the first 3 months to 1 year of life. However, during the neonatal period, it is not easy to distinguish SHCB from other inflammatory forms of autosomal recessive congenital ichthyosis, such as congenital ichthyosiform erythroderma. Here, we report a case study of two Japanese SHCB patients with compound heterozygous mutations, c.235G>T (p.(Glu79∗))/ c.1189C>T (p.(Arg397Cys)) and c.1295A>G (p.(Tyr432Cys))/ c.1138delG (p.(Asp380Thrfs∗3)), in CYP4F22, which encodes cytochrome P450, family 4, subfamily F, polypeptide 22 (CYP4F22). Immunohistochemically, inflammation with the strong expression of IL-17C, IL-36γ, and TNF-α was seen in the skin at birth. CYP4F22 is an ultra-long-chain FA ω-hydroxylase responsible for ω-O-acylceramide (acylceramide) production. Among the epidermal ceramides, acylceramide is a key lipid in maintaining the epidermal permeability barrier function. We found that the levels of ceramides with ω-hydroxy FAs including acylceramides and the levels of protein-bound ceramides were much lower in stratum corneum samples obtained by tape stripping from SHCB patients than in those from their unaffected parents and individuals without SHCB. Additionally, our cell-based enzyme assay revealed that two mutants, p.(Glu79∗) and p.(Arg397Cys), had no enzyme activity. Our findings suggest that genetic testing coupled with noninvasive ceramide analyses using tape-stripped stratum corneum samples might be useful for the early and precise diagnosis of congenital ichthyoses, including SHCB.
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Affiliation(s)
- Takuya Takeichi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yusuke Ohno
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Kana Tanahashi
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yasutoshi Ito
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Ken Shiraishi
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Ryo Utsunomiya
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Satoshi Yoshida
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - Kenta Ikeda
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Hayato Nomura
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Shin Morizane
- Department of Dermatology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences, Okayama, Japan
| | - Koji Sayama
- Department of Dermatology, Ehime University Graduate School of Medicine, Ehime, 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
| | - Yoshinao Muro
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akio Kihara
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan
| | - Masashi Akiyama
- Department of Dermatology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
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