1
|
Liu Y, Bao L, Sodha D, Li J, Mansini A, Djalilian AR, Li X, Qian H, Ishii N, Hashimoto T, Amber KT. Ocular Mucous Membrane Pemphigoid Demonstrates a Distinct Autoantibody Profile from Those of Other Autoimmune Blistering Diseases: A Preliminary Study. Antibodies (Basel) 2024; 13:91. [PMID: 39584991 PMCID: PMC11586953 DOI: 10.3390/antib13040091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2024] [Revised: 10/28/2024] [Accepted: 11/08/2024] [Indexed: 11/26/2024] Open
Abstract
Background: Ocular predominant mucous membrane pemphigoid (oMMP) is a severe subtype of autoimmune blistering disease (AIBD), which can result in scarring and vision loss. The diagnosis of oMMP is challenging as patients often have undetectable levels of circulating autoantibodies by conventional assays. Likewise, the principal autoantigen in oMMP has been an area of debate. Methods: In this preliminary experiment, we performed Phage Immunoprecipitation Sequencing (PhIP-seq) on sera from patients with oMMP, as well as non-ocular MMP, bullous pemphigoid, and mucocutaneous-type pemphigus vulgaris. Results: We identified several autoantigens unique to oMMP relative to other AIBDs. We then cross-referenced these antigens against previously published single-nuclei datasets, as well as the International Mouse Phenotyping Consortium Database. Several protein hits identified in our study demonstrated enriched expression on the anterior surface epithelia, including TNKS1BP1, SEC16B, FNBP4, CASZ1, GOLGB1, DOT1L, PRDM 15, LARP4B, and RPL6. Likewise, a previous study of mouse knockout models of murine analogs CASZ1, HIP1, and ELOA2 reported that these mice showed abnormalities in terms of the ocular surface and development in the eyes. Notably, PhIP-seq failed to identify the canonical markers of AIBDs such as BP180, BP230, desmogleins 1 and 3, or integrin β4, indicating that the patient autoantibodies react with conformational epitopes rather than linear epitopes. Conclusions: oMMP patients demonstrate a unique autoantibody repertoire relative to the other AIBDs. Further validation of the identified autoantibodies will shed light on their potentially pathogenic role.
Collapse
Affiliation(s)
- Yingzi Liu
- Department of Developmental and Cell Biology, University of California Irvine, Irvine, CA 92617, USA
| | - Lei Bao
- Department of Dermatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Dharm Sodha
- Department of Dermatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Jing Li
- Department of Dermatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Adrian Mansini
- Department of Dermatology, Rush University Medical Center, Chicago, IL 60612, USA
| | - Ali R. Djalilian
- Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Xiaoguang Li
- Central Laboratory, Dermatology Hospital of Jiangxi Province, Dermatology Institute of Jiangxi Province, and the Affiliated Dermatology Hospital of Nanchang University, Nanchang 331332, China
| | - Hua Qian
- Central Laboratory, Dermatology Hospital of Jiangxi Province, Dermatology Institute of Jiangxi Province, and the Affiliated Dermatology Hospital of Nanchang University, Nanchang 331332, China
| | - Norito Ishii
- Department of Dermatology, Kurume University School of Medicine, Kurume University Institute of Cutaneous Cell Biology, Kurume 830-0011, Japan
| | - Takashi Hashimoto
- Department of Dermatology, Graduate School of Medicine, Osaka Metropolitan University, Osaka 545-8585, Japan
| | - Kyle T. Amber
- Department of Dermatology, Rush University Medical Center, Chicago, IL 60612, USA
| |
Collapse
|
2
|
Arase N, Sasaoka Y, Narita J, Kiyohara E, Hashimoto K, Shinzaki S, Nojima S, Takagi J, Fujimoto M. Anti-α6β4 integrin autoantibodies inhibit the binding of laminins to α6β4 integrin in patients with pemphigoid and affect the gastrointestinal tract. J Eur Acad Dermatol Venereol 2024; 38:404-412. [PMID: 37857595 DOI: 10.1111/jdv.19582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 09/27/2023] [Indexed: 10/21/2023]
Abstract
BACKGROUND Anti-α6β4 integrin autoantibodies can be observed in some patients with mucous membrane pemphigoid. We have previously identified anti-α6β4 integrin extracellular domain autoantibodies together with anti-BP180 NC16A antibodies in a patient with DPP-4 inhibitor-induced bullous pemphigoid. However, the significance and impact of anti-α6β4 integrin antibodies are unknown. OBJECTIVES To characterize anti-α6β4 integrin extracellular domain autoantibodies in pemphigoid patients, to determine whether these antibodies inhibit laminin-α6β4 integrin binding and to observe their systemic effects. METHODS Anti-α6β4 integrin autoantibodies were analysed by staining cells expressing the extracellular region of α6β4 integrin with sera from 20 patients with pemphigoid. The anti-α6β4 integrin autoantibodies were characterized using different transfectants. The binding of laminins to α6β4 integrin was studied using cells expressing the activated conformation of α6β4 integrin and the inhibitory effect of the autoantibodies on the binding of laminins to α6β4 integrin was tested. Trends in antibody titres and clinical symptoms were quantified and analysed. RESULTS IgG autoantibodies against the extracellular domain of anti-α6β4 integrin were found in some patients with pemphigoid. Laminin binding to α6β4 integrin was observed in the active conformation of α6β4 integrin, and serum from a patient with a high titre of anti-α6β4 integrin antibodies inhibited the binding of both laminin-511 and laminin-332 to α6β4 integrin. α6β4 integrin is expressed on the basement membrane of both skin and small intestine, and exfoliation was observed in the patient's epidermis and small intestinal epithelium. A reduction in the titre of the anti-α6β4 integrin antibody was associated with improvement in both skin and gastrointestinal symptoms. CONCLUSIONS This study demonstrated the presence of anti-α6β4 integrin extracellular domain-specific autoantibodies in some patients with pemphigoid. In addition, these autoantibodies showed inhibitory activity on α6β4 integrin-laminin binding. Anti-α6β4 integrin antibodies can affect the gastrointestinal tract as well as the skin and oral mucosa.
Collapse
Affiliation(s)
- Noriko Arase
- Department of Dermatology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Yusuke Sasaoka
- Department of Dermatology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Jun Narita
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Eiji Kiyohara
- Department of Dermatology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Kazuhisa Hashimoto
- Department of Pediatrics, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Shinichiro Shinzaki
- Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Osaka, Japan
- Department of Gastroenterology, Hyogo Medical University School of Medicine, Hyogo, Japan
| | - Satoshi Nojima
- Department of Pathology, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Junichi Takagi
- Laboratory for Protein Synthesis and Expression, Institute for Protein Research, Osaka University, Osaka, Japan
| | - Manabu Fujimoto
- Department of Dermatology, Osaka University Graduate School of Medicine, Osaka, Japan
- Laboratory for Cutaneous Immunology, Immunology Frontier Research Center, Osaka University, Osaka, Japan
| |
Collapse
|
3
|
de Nicolas-Ruanes B, Ballester-Martinez A, Garcia-Mouronte E, Berna-Rico E, Azcarraga-Llobet C, Fernandez-Guarino M. From Molecular Insights to Clinical Perspectives in Drug-Associated Bullous Pemphigoid. Int J Mol Sci 2023; 24:16786. [PMID: 38069109 PMCID: PMC10706090 DOI: 10.3390/ijms242316786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Revised: 11/19/2023] [Accepted: 11/22/2023] [Indexed: 12/18/2023] Open
Abstract
Bullous pemphigoid (BP), the most common autoimmune blistering disease, is characterized by the presence of autoantibodies targeting BP180 and BP230 in the basement membrane zone. This leads to the activation of complement-dependent and independent pathways, resulting in proteolytic cleavage at the dermoepidermal junction and an eosinophilic inflammatory response. While numerous drugs have been associated with BP in the literature, causality and pathogenic mechanisms remain elusive in most cases. Dipeptidyl peptidase 4 inhibitors (DPP4i), in particular, are the most frequently reported drugs related to BP and, therefore, have been extensively investigated. They can potentially trigger BP through the impaired proteolytic degradation of BP180, combined with immune dysregulation. DPP4i-associated BP can be categorized into true drug-induced BP and drug-triggered BP, with the latter resembling classic BP. Antineoplastic immunotherapy is increasingly associated with BP, with both B and T cells involved. Other drugs, including biologics, diuretics and cardiovascular and neuropsychiatric agents, present weaker evidence and poorly understood pathogenic mechanisms. Further research is needed due to the growing incidence of BP and the increasing identification of new potential triggers.
Collapse
Affiliation(s)
- Belen de Nicolas-Ruanes
- Dermatology Department, Hospital Universitario Ramon y Cajal, 28034 Madrid, Spain (C.A.-L.); (M.F.-G.)
| | | | | | | | | | | |
Collapse
|