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Darbord D, Hickman G, Pironon N, Barbieux C, Bonnet-des-Claustres M, Titeux M, Miskinyte S, Cordoliani F, Vignon-Pennamen MD, Amode R, Hovnanian A, Bourrat E. Dystrophic epidermolysis bullosa pruriginosa: a new case series of a rare phenotype unveils skewed Th2 immunity. J Eur Acad Dermatol Venereol 2021; 36:133-143. [PMID: 34543471 DOI: 10.1111/jdv.17671] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 08/03/2021] [Indexed: 12/16/2022]
Abstract
BACKGROUND Dystrophic epidermolysis bullosa pruriginosa (DEB-Pr) is a rare subtype of hereditary epidermolysis bullosa, with a poorly understood pathogenesis and no satisfactory treatment. OBJECTIVES To assess the clinical and biological features, genetic basis and therapeutic management, to better characterize this rare genodermatosis. METHODS We have conducted a retrospective study, reviewing the clinical presentation, genetic diagnosis, immunohistopathological findings and biological characteristics and management of patients with dystrophic epidermolysis bullosa pruriginosa. This study was conducted in the Department of Dermatology at Saint-Louis Hospital and the Department of Genetics at Necker Hospital (Paris, France). All patients with a diagnosis of DEB-Pr seen between 2010 and 2020 were included. RESULTS Seven patients were included, the average age of 50.1 years [range 36-76]. Pruriginous-lichenified papules, plaques or nodules appeared at 27.6 years on average [range 7-66] on pretibial areas and forearms, associated with milia and toenails dystrophy. All patients received multiple treatments, but none could sustainably reduce pruritus. Immunohistopathological analysis of lesion skin revealed subepidermal blister with fibrosis, milia and mast cell infiltration. Serum TNFα, IL1β and IL6 levels were elevated in 2/6 patients. Total serum IgE levels were increased in 7/7 patients, with no history of atopy. Immunophenotyping of circulating T-cells revealed an increased Th2 subset in 4/4 patients, with reduced Th1 and Th17 subpopulations. Genetic analysis of COL7A1 identified 7 distinct causative mutations, six of which were new. Intra-familial clinical variability was documented in 5/7 patients and was associated with the co-inheritance of a recessive COL7A1 mutation or an FLG2 mutation in 2 families. CONCLUSION Our study confirms the stereotyped presentation of DEB-Pr with large intra-familial variability in disease expression. Mast cell infiltration, elevated IgE and increased Th2 subset without atopy strongly support a role of Th2-mediated immunity in DEB-Pr, and further argue for new targeted therapeutic options such as dupilumab.
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Affiliation(s)
- D Darbord
- Department of Dermatology, Hôpital Saint Louis, Assistance Publique des Hôpitaux de Paris (AP-HP), Paris, France
| | - G Hickman
- Department of Dermatology, Hôpital Saint Louis, Assistance Publique des Hôpitaux de Paris (AP-HP), Paris, France.,Centre de référence maladies rares MAGEC Nord Site Saint Louis, Hôpital Saint Louis, Paris, France
| | - N Pironon
- INSERM UMR 1163, Laboratory of genetic skin diseases, Institut Imagine, Paris Université, Paris, France
| | - C Barbieux
- INSERM UMR 1163, Laboratory of genetic skin diseases, Institut Imagine, Paris Université, Paris, France
| | - M Bonnet-des-Claustres
- INSERM UMR 1163, Laboratory of genetic skin diseases, Institut Imagine, Paris Université, Paris, France
| | - M Titeux
- INSERM UMR 1163, Laboratory of genetic skin diseases, Institut Imagine, Paris Université, Paris, France
| | - S Miskinyte
- INSERM UMR 1163, Laboratory of genetic skin diseases, Institut Imagine, Paris Université, Paris, France
| | - F Cordoliani
- Department of Dermatology, Hôpital Saint Louis, Assistance Publique des Hôpitaux de Paris (AP-HP), Paris, France
| | | | - R Amode
- Department of Dermatology, Hôpital Bichat, AP-HP, Paris, France
| | - A Hovnanian
- INSERM UMR 1163, Laboratory of genetic skin diseases, Institut Imagine, Paris Université, Paris, France.,Department of Genetics, Hôpital Necker-enfants malades, AP-HP, Paris, France
| | - E Bourrat
- Department of Dermatology, Hôpital Saint Louis, Assistance Publique des Hôpitaux de Paris (AP-HP), Paris, France.,Centre de référence maladies rares MAGEC Nord Site Saint Louis, Hôpital Saint Louis, Paris, France
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Kim WB, Alavi A, Walsh S, Kim S, Pope E. Epidermolysis bullosa pruriginosa: a systematic review exploring genotype-phenotype correlation. Am J Clin Dermatol 2015; 16:81-7. [PMID: 25690953 DOI: 10.1007/s40257-015-0119-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
INTRODUCTION Epidermolysis bullosa pruriginosa (EBP) is a clinical variant of dystrophic epidermolysis bullosa (DEB), characterized by intense pruritus and hypertrophic, lichenified, prurigo-like papules, plaques, and nodules secondary to scratching. These clinical findings have been attributed to various mutations in the COL7A1 gene. Previous reports have yielded inconsistent findings regarding a possible genotype-phenotype relationship in EBP. OBJECTIVE Our aim was to conduct a systematic review aimed at assessing the genotype-phenotype correlation in EBP. METHODS A systematic review was conducted using PubMed, Medline, EMBASE, and Cochrane databases for all reports of mutation-verified EBP, published from 1946 to September 2014. Statistical comparison of clinical findings between mutation types was performed using logistic regression analysis. RESULTS The review included a total of 28 articles with 74 individuals, which consisted of level 4 non-controlled case series (grade C) and level 5 case reports (grade D). Previous reported mutation types included glycine substitution (GS, 52.7%), in-frame skipping (IFS, 33.8%), non-glycine substitution (NGS, 8.1%), and premature termination codon (PTC, 5.4%). The most common clinical findings were extremities involvement, linear configuration, and nail dystrophy. In comparison with GS mutation carriers, IFS carriers had a higher likelihood of (1) being male (OR 2.99; p = 0.043; 95% CI 1.27-11.4) and (2) presenting with blisters (OR 4.10; p = 0.013; 95% CI 1.34-12.5). CONCLUSIONS To our knowledge, this study is the first systematic review examining the relationship between mutation type and clinical presentation in EBP. The findings in this review (1) identify common clinical characteristics of EBP that may help in the assessment of patients with possible EBP; and (2) indicate that certain mutation carriers may have a higher likelihood of exhibiting particular phenotypes. In the case of potential diagnostic challenge, assessment for presence of common clinical findings as well as molecular testing may facilitate correct identification and prognostication.
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Ni C, Zhang J, Zhang H, Cheng RH, Liang JY, Li CX, Li M, Yao ZR. A novel mutation in the COL7A1 gene results in a unique phenotype of epidermolysis bullosa pruriginosa. J Eur Acad Dermatol Venereol 2015; 30:535-6. [PMID: 25556825 DOI: 10.1111/jdv.12933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- C Ni
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - J Zhang
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - H Zhang
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - R-H Cheng
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - J-Y Liang
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - C-X Li
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - M Li
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
| | - Z-R Yao
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, 1665 Kongjiang Road, Shanghai, 200092, China
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