1
|
Karakioulaki M, Eyerich K, Patsatsi A. Advancements in Bullous Pemphigoid Treatment: A Comprehensive Pipeline Update. Am J Clin Dermatol 2024; 25:195-212. [PMID: 38157140 PMCID: PMC10866767 DOI: 10.1007/s40257-023-00832-1] [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] [Accepted: 11/19/2023] [Indexed: 01/03/2024]
Abstract
ABASTRACT Bullous pemphigoid (BP) is a common autoimmune bullous disease affecting mainly the elderly, with rising incidence due to increased life expectancy. This disease is characterized by tense bullous lesions on normal or erythematous skin, accompanied by pruritus. BP pathogenesis involves autoantibodies against hemidesmosomal proteins BP180 and BP230, leading to detachment at the dermo-epidermal junction as well as blister formation. BP is associated with coexisting comorbidities and drug exposure, and its management often requires high doses or chronic use of systemic glucocorticoids, posing risks of adverse effects. This review focuses on novel treatment options for BP, exploring therapies targeting different immune pathways. Rituximab, a CD20 monoclonal antibody, depletes B-lymphocytes and has shown efficacy in severe cases. Dupilumab, targeting interleukin (IL)-4 receptor α and thus blocking IL-4 and IL-13, downregulates type 2 helper (Th2) responses and has demonstrated promising results. Targeting eosinophil-related molecules using bertilimumab and AKST4290 has yielded positive results in clinical trials. Omalizumab, an immunoglobulin (Ig) E antibody, can reduce disease severity and allows corticosteroid tapering in a number of cases. Complement inhibitors such as nomacopan and avdoralimab are being investigated. IL-17 and IL-23 inhibitors such as secukinumab and tildrakizumab have shown potential in a limited number of case reports. Neonatal Fc receptor antagonists such as efgartigimod are under investigation. Additionally, topical therapies and Janus kinase inhibitors are being explored as potential treatments for BP. These novel therapies offer promising alternatives for managing BP, with potential to improve outcomes and reduce high cumulative doses of systemic corticosteroids and related toxicities. Further research, including controlled clinical trials, is needed to establish their efficacy, safety, and optimal dosing regimens for BP management.
Collapse
Affiliation(s)
- Meropi Karakioulaki
- Department of Dermatology and Venerology, Medical Center, University Hospital Freiburg, Freiburg, Germany
| | - Kilian Eyerich
- Department of Dermatology and Venerology, Medical Center, University Hospital Freiburg, Freiburg, Germany
| | - Aikaterini Patsatsi
- Second Department of Dermatology, School of Medicine, Papageorgiou Hospital, Aristotle University, Thessaloníki, Greece.
| |
Collapse
|
2
|
West EE, Woodruff T, Fremeaux-Bacchi V, Kemper C. Complement in human disease: approved and up-and-coming therapeutics. Lancet 2024; 403:392-405. [PMID: 37979593 PMCID: PMC10872502 DOI: 10.1016/s0140-6736(23)01524-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 07/07/2023] [Accepted: 07/20/2023] [Indexed: 11/20/2023]
Abstract
The complement system is recognised as a protector against blood-borne pathogens and a controller of immune system and tissue homoeostasis. However, dysregulated complement activity is associated with unwanted or non-resolving immune responses and inflammation, which induce or exacerbate the pathogenesis of a broad range of inflammatory and autoimmune diseases. Although the merit of targeting complement clinically has long been acknowledged, the overall complement drug approval rate has been modest. However, the success of the humanised anti-C5 antibody eculizumab in effectively treating paroxysmal nocturnal haemoglobinuria and atypical haemolytic syndrome has revitalised efforts to target complement therapeutically. Increased understanding of complement biology has led to the identification of novel targets for drug development that, in combination with advances in drug discovery and development technologies, has resulted in a surge of interest in bringing new complement therapeutics into clinical use. The rising number of approved drugs still almost exclusively target rare diseases, but the substantial pipeline of up-and-coming treatment options will possibly provide opportunities to also expand the clinical targeting of complement to common diseases.
Collapse
Affiliation(s)
- Erin E West
- Complement and Inflammation Research Section, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Trent Woodruff
- School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Veronique Fremeaux-Bacchi
- Inserm UMRS1138, Centre de Recherche des Cordeliers, Inflammation, Complement, and Cancer Team, Paris, France; Department of Immunology, Hôpital Européen Georges Pompidou, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Claudia Kemper
- Complement and Inflammation Research Section, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
| |
Collapse
|
3
|
Sant'Anna MRV, Pereira-Filho AA, Mendes-Sousa AF, Silva NCS, Gontijo NF, Pereira MH, Koerich LB, D'Avila Pessoa GC, Andersen J, Araujo RN. Inhibition of vertebrate complement system by hematophagous arthropods: inhibitory molecules, mechanisms, physiological roles, and applications. INSECT SCIENCE 2024. [PMID: 38246860 DOI: 10.1111/1744-7917.13317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/28/2023] [Accepted: 12/07/2023] [Indexed: 01/23/2024]
Abstract
In arthropods, hematophagy has arisen several times throughout evolution. This specialized feeding behavior offered a highly nutritious diet obtained during blood feeds. On the other hand, blood-sucking arthropods must overcome problems brought on by blood intake and digestion. Host blood complement acts on the bite site and is still active after ingestion, so complement activation is a potential threat to the host's skin feeding environment and to the arthropod gut enterocytes. During evolution, blood-sucking arthropods have selected, either in their saliva or gut, anticomplement molecules that inactivate host blood complement. This review presents an overview of the complement system and discusses the arthropod's salivary and gut anticomplement molecules studied to date, exploring their mechanism of action and other aspects related to the arthropod-host-pathogen interface. The possible therapeutic applications of arthropod's anticomplement molecules are also discussed.
Collapse
Affiliation(s)
- Mauricio Roberto Vianna Sant'Anna
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brazil
| | - Adalberto Alves Pereira-Filho
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | | | - Naylene Carvalho Sales Silva
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Nelder Figueiredo Gontijo
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brazil
| | - Marcos Horácio Pereira
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brazil
| | - Leonardo Barbosa Koerich
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brazil
| | - Grasielle Caldas D'Avila Pessoa
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brazil
| | - John Andersen
- Vector Molecular Biology Section, Laboratory of Malaria and Vector Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, USA
| | - Ricardo Nascimento Araujo
- Department of Parasitology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
- Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular, Rio de Janeiro, RJ, Brazil
| |
Collapse
|
4
|
Chen HC, Wang CW, Toh WH, Lee HE, Chung WH, Chen CB. Advancing Treatment in Bullous Pemphigoid: A Comprehensive Review of Novel Therapeutic Targets and Approaches. Clin Rev Allergy Immunol 2023; 65:331-353. [PMID: 37897588 DOI: 10.1007/s12016-023-08973-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/15/2023] [Indexed: 10/30/2023]
Abstract
Bullous pemphigoid is one of the most common autoimmune bullous diseases occurring primarily in the elderly. Pathogenic autoantibodies against BP180 and BP230 at the dermal-epidermal junction cause subepidermal blisters, erosions, and intense pruritus, all of which adversely affect the patients' quality of life and may increase their morbidity and mortality. Current systemic treatment options for bullous pemphigoid are limited to corticosteroids and immunosuppressants, which can have substantial side effects on these vulnerable patients that even exceed their therapeutic benefits. Therefore, more precisely, targeting therapies to the pathogenic cells and molecules in bullous pemphigoid is an urgent issue. In this review, we describe the pathophysiology of bullous pemphigoid, focusing on autoantibodies, complements, eosinophils, neutrophils, proteases, and the T helper 2 and 17 axes since they are crucial in promoting proinflammatory environments. We also highlight the emerging therapeutic targets for bullous pemphigoid and their latest discoveries in clinical trials or experimental studies. Further well-designed studies are required to establish the efficacy and safety of these prospective therapeutic options.
Collapse
Affiliation(s)
- Hsuan-Chi Chen
- Department of Medical Education, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Chuang-Wei Wang
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Keelung, Linkou, Taipei, Taiwan
- Cancer Vaccine and Immune Cell Therapy Core Laboratory, Department of Medical Research, Chang Gung Memorial Hospital, Linkou, Taiwan
- Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Kaohsiung, Taiwan
- Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China
- Xiamen Chang Gung Allergology Consortium, Xiamen Chang Gung Hospital, Xiamen, China
| | - Wu Han Toh
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, MD, USA
- Translational Tissue Engineering Center, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Computer Science, Johns Hopkins University, Baltimore, MD, USA
- Department of Biology, Johns Hopkins University, Baltimore, MD, USA
| | - Hua-En Lee
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Keelung, Linkou, Taipei, Taiwan
- Cancer Vaccine and Immune Cell Therapy Core Laboratory, Department of Medical Research, Chang Gung Memorial Hospital, Linkou, Taiwan
- College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Wen-Hung Chung
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Keelung, Linkou, Taipei, Taiwan.
- Cancer Vaccine and Immune Cell Therapy Core Laboratory, Department of Medical Research, Chang Gung Memorial Hospital, Linkou, Taiwan.
- Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Kaohsiung, Taiwan.
- Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China.
- Xiamen Chang Gung Allergology Consortium, Xiamen Chang Gung Hospital, Xiamen, China.
- College of Medicine, Chang Gung University, Taoyuan, Taiwan.
- Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan.
- Whole-Genome Research Core Laboratory of Human Diseases, Chang Gung Memorial Hospital, Keelung, Taiwan.
- Department of Dermatology, Beijing Tsinghua Chang Gung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China.
- Department of Dermatology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
- Genomic Medicine Core Laboratory, Chang Gung Memorial Hospital, Linkou, Taiwan.
| | - Chun-Bing Chen
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Keelung, Linkou, Taipei, Taiwan.
- Cancer Vaccine and Immune Cell Therapy Core Laboratory, Department of Medical Research, Chang Gung Memorial Hospital, Linkou, Taiwan.
- Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University, Kaohsiung, Taiwan.
- Department of Dermatology, Xiamen Chang Gung Hospital, Xiamen, China.
- Xiamen Chang Gung Allergology Consortium, Xiamen Chang Gung Hospital, Xiamen, China.
- School of Medicine, National Tsing Hua University, Hsinchu, Taiwan.
- College of Medicine, Chang Gung University, Taoyuan, Taiwan.
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
- Immune-Oncology Center of Excellence, Chang Gung Memorial Hospital, Linkou, Taiwan.
| |
Collapse
|
5
|
Hundt JE, Sadik CD, van Beek N, Busch H, Caux F, Goebeler M, Hammers CM, Hartmann K, Hashimoto T, Ibrahim S, Kasperkiewicz M, Murrell DF, Recke A, Rose C, Schumacher N, Shimanovich I, Sitaru C, Terheyden P, Thaçi D, Ludwig RJ, Schmidt E. A life for autoimmune blistering diseases: in memoriam Detlef Zillikens. Front Immunol 2023; 14:1291590. [PMID: 38175817 PMCID: PMC10621786 DOI: 10.3389/fimmu.2023.1291590] [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: 09/09/2023] [Accepted: 09/22/2023] [Indexed: 01/06/2024] Open
Abstract
Detlef Zillikens, MD, director and chair of the Department of Dermatology at the University of Lübeck, Lübeck, Germany, died in September 2022, aged only 64. He dedicated his professional life to autoimmune blistering diseases (AIBDs) and built his department into one of the world's leading centers for these diseases. Herein, his professional life and the impact on the field of AIBDs and the research landscape at the University of Lübeck are addressed. With his warm, integrative, open-minded, ever-optimistic attitude, he was a highly reliable colleague, mentor, and friend to many in the field including each of the authors. Combined with his in-depth knowledge of dermatology, interest in many fields of life science, and hard work, Detlef Zillikens initiated the founding of two independent research institutes, the Lübeck Institute of Experimental Dermatology and the Institute and Comprehensive Center for Inflammation Medicine. He was also instrumental in establishing the Center for Research on Inflammation of the Skin, where in a new research building, over 140 scientists pursue research questions related to skin inflammation. By inviting numerous researchers and clinicians to his department and hosting two large international meetings, he brought the field of AIBDs much closer together and inspired multiple national and international research initiatives. His ideas will live on and grow in many of his colleagues and mentees.
Collapse
Affiliation(s)
- Jennifer E. Hundt
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | | | - Nina van Beek
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Hauke Busch
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Frédéric Caux
- Department of Dermatology, Groupe Hospitalier Paris Seine-Saint-Denis, AP-HP, Bobigny, France
| | - Matthias Goebeler
- Department of Dermatology, University of Würzburg, Würzburg, Germany
| | - Christoph M. Hammers
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
- Department of Dermatology, University of Kiel, Kiel, Germany
| | | | - Takashi Hashimoto
- Department of Dermatology, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Saleh Ibrahim
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
- Khalifa University, Abu Dhabi, United Arab Emirates
| | - Michael Kasperkiewicz
- Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles, CA, United States
| | - Dedee F. Murrell
- Department of Dermatology, St George Hospital, University of New South Wales (UNSW), Sydney, NSW, Australia
| | - Andreas Recke
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Christian Rose
- Department of Dermatology, University of Lübeck, Lübeck, Germany
- Dermatohistologisches Einsendelabor Lübeck, Lübeck, Germany
| | - Nina Schumacher
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | | | - Cassian Sitaru
- Department of Dermatology, Faculty of Medicine, Medical Center-University of Freiburg, Freiburg, Germany
| | | | - Diamant Thaçi
- Institute and Comprehensive Center for Inflammation Medicine (CCIM), University of Lübeck, Lübeck, Germany
| | - Ralf J. Ludwig
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Enno Schmidt
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| |
Collapse
|
6
|
Didona D, Schmidt MF, Maglie R, Solimani F. Pemphigus and pemphigoids: Clinical presentation, diagnosis and therapy. J Dtsch Dermatol Ges 2023; 21:1188-1209. [PMID: 37587612 DOI: 10.1111/ddg.15174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 06/11/2023] [Indexed: 08/18/2023]
Abstract
Pemphigus and pemphigoid are two potentially life-threatening groups of autoimmune diseases, characterized by autoantibodies targeting structural components of desmosomes or hemidesmosomes, respectively. Affected patients typically show itchy/painful plaques or blistering skin lesions and/or impairing mucosal blistering and erosions, which may strongly impact their quality of life. Since the milestone work of Walter Lever in 1953, who differentiated these two groups of diseases by histopathological analysis of the level of antibody-mediated skin cleavage, enormous progresses occurred. Achievements made in laboratory diagnostics now allow to identify antigen specific structural proteins of the skin that are targeted by pathogenic autoantibodies. These progresses were accompanied by an increased understanding of the pathogenesis of these diseases thanks to the establishment of animal models reproducing disease and on studies on skin and blood of affected individuals, which have been leading to novel and disease-specific treatments. Yet, given their phenotypical overlap with more common dermatological diseases, correct diagnosis and appropriate treatment are often delayed, in some cases leading to irreversible sequelae, including organ dysfunction (i.e., loss of vision in mucous membrane pemphigoid). Here, we provide a concise overview of the clinical appearance, diagnosis and therapeutic management of pemphigus and pemphigoid diseases.
Collapse
Affiliation(s)
- Dario Didona
- Department of Dermatology and Allergology, Philipps-Universität Marburg, Marburg, Germany
| | - Morna F Schmidt
- Department of Dermatology and Allergology, University Hospital RWTH Aachen, Aachen, Germany
| | - Roberto Maglie
- Department of Dermatology and Allergology, Philipps-Universität Marburg, Marburg, Germany
- Department of Health Sciences, Section of Dermatology, University of Florence, Florence, Italy
| | - Farzan Solimani
- Department of Dermatology, Venereology and Allergology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, BIH Charité Clinician Scientist Program, Germany
| |
Collapse
|
7
|
Didona D, Schmidt MF, Maglie R, Solimani F. Pemphigus- und Pemphigoid-Erkrankungen: Klinik, Diagnostik und Therapie: Pemphigus and pemphigoids: Clinical presentation, diagnosis and therapy. J Dtsch Dermatol Ges 2023; 21:1188-1211. [PMID: 37845066 DOI: 10.1111/ddg.15174_g] [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: 11/30/2022] [Accepted: 06/11/2023] [Indexed: 10/18/2023]
Abstract
ZusammenfassungPemphigus und Pemphigoid sind seltene Autoimmunkrankheiten der Haut mit potenziell lebensbedrohlichem Verlauf. Autoantikörper gegen epidermale und junktionale Strukturproteine (Desmosomen sowie Hemidesmosomen) führen bei Betroffenen typischerweise zu juckenden, schmerzhaften Plaques oder Blasen an der Haut und/oder Blasenbildung und Erosionen der Schleimhäute mit möglicher Einschränkung der Lebensqualität. Seit der bahnbrechenden Arbeit von Walter Lever im Jahr 1953, dem es gelang, mittels histopathologischer Untersuchung diese beiden Krankheitsgruppen anhand des Musters der Antikörper‐vermittelten Blasenbildung zu differenzieren, wurden enorme Fortschritte im Verständnis der Erkrankungen erzielt. Die Errungenschaften in der Labordiagnostik ermöglichten die Identifikation von Zielstrukturen zur präzisen Unterscheidung verschiedener Varianten der bullösen Autoimmunerkrankungen. Diese Fortschritte gingen dank der Entwicklung von Tiermodellen mit einem besseren Verständnis der Pathogenese einher. Außerdem haben Studien an Haut und Blut betroffener Patienten zu neuen und krankheitsspezifischen Behandlungen geführt. Aufgrund ihrer Seltenheit und der klinischen Ähnlichkeit mit anderen dermatologischen Erkrankungen verzögern sich die korrekte Diagnosestellung und die Einleitung einer entsprechenden Therapie häufig, was in einigen Fällen zu irreversiblen Folgeerscheinungen, einschließlich Funktionsstörungen von Organen (zum Beispiel Verlust des Sehvermögens beim Schleimhautpemphigoid) führt. Wir geben hier einen Überblick über das klinische Erscheinungsbild, den Diagnosealgorithmus und das therapeutische Management von Pemphigus‐ und Pemphigoid‐Erkrankungen.
Collapse
Affiliation(s)
- Dario Didona
- Klinik für Dermatologie und Allergologie, Philipps-Universität Marburg, Marburg, Deutschland
| | - Morna F Schmidt
- Klinik für Dermatologie und Allergologie, Uniklinik RWTH Aachen, Aachen, Deutschland
| | - Roberto Maglie
- Klinik für Dermatologie und Allergologie, Philipps-Universität Marburg, Marburg, Deutschland
- Abteilung für Gesundheitswissenschaften, Abteilung für Dermatologie, Universität Florenz, Florenz, Italien
| | - Farzan Solimani
- Klinik für Dermatologie, Venerologie und Allergologie, Charité - Universitätsmedizin Berlin, Korporatives Mitglied der Freien Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Deutschland
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, BIH Charité Clinician Scientist Program, Berlin, Deutschland
| |
Collapse
|
8
|
Wiffen L, D’Cruz LG, Brown T, Higenbottam TW, Bernstein JA, Campbell C, Moellman J, Ghosh D, Richardson C, Weston-Davies W, Chauhan AJ. Clinical severity classes in COVID-19 pneumonia have distinct immunological profiles, facilitating risk stratification by machine learning. Front Immunol 2023; 14:1192765. [PMID: 37731491 PMCID: PMC10508987 DOI: 10.3389/fimmu.2023.1192765] [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: 03/23/2023] [Accepted: 07/25/2023] [Indexed: 09/22/2023] Open
Abstract
Objective Clinical triage in coronavirus disease 2019 (COVID-19) places a heavy burden on senior clinicians during a pandemic situation. However, risk stratification based on serum biomarker bioprofiling could be implemented by a larger, nonspecialist workforce. Method Measures of Complement Activation and inflammation in patientS with CoronAvirus DisEase 2019 (CASCADE) patients (n = 72), (clinicaltrials.gov: NCT04453527), classified as mild, moderate, or severe (by support needed to maintain SpO2 > 93%), and healthy controls (HC, n = 20), were bioprofiled using 76 immunological biomarkers and compared using ANOVA. Spearman correlation analysis on biomarker pairs was visualised via heatmaps. Linear Discriminant Analysis (LDA) models were generated to identify patients likely to deteriorate. An X-Gradient-boost (XGB) model trained on CASCADE data to triage patients as mild, moderate, and severe was retrospectively employed to classify COROnavirus Nomacopan Emergency Treatment for covid 19 infected patients with early signs of respiratory distress (CORONET) patients (n = 7) treated with nomacopan. Results The LDA models distinctly discriminated between deteriorators, nondeteriorators, and HC, with IL-27, IP-10, MDC, ferritin, C5, and sC5b-9 among the key predictor variables during deterioration. C3a and C5 were elevated in all severity classes vs. HC (p < 0.05). sC5b-9 was elevated in the "moderate" and "severe" categories vs. HC (p < 0.001). Heatmap analysis shows a pairwise increase of negatively correlated pairs with IL-27. The XGB model indicated sC5b-9, IL-8, MCP1, and prothrombin F1 and F2 were key discriminators in nomacopan-treated patients (CORONET study). Conclusion Distinct immunological fingerprints from serum biomarkers exist within different severity classes of COVID-19, and harnessing them using machine learning enabled the development of clinically useful triage and prognostic tools. Complement-mediated lung injury plays a key role in COVID-19 pneumonia, and preliminary results hint at the usefulness of a C5 inhibitor in COVID-19 recovery.
Collapse
Affiliation(s)
- Laura Wiffen
- Research and Innovation Department, Portsmouth Hospitals University National Health Service (NHS) Trust, Portsmouth, United Kingdom
| | - Leon Gerard D’Cruz
- Research and Innovation Department, Portsmouth Hospitals University National Health Service (NHS) Trust, Portsmouth, United Kingdom
- School of Pharmacy & Biomedical Science, University of Portsmouth, Portsmouth, United Kingdom
| | - Thomas Brown
- Research and Innovation Department, Portsmouth Hospitals University National Health Service (NHS) Trust, Portsmouth, United Kingdom
| | | | - Jonathan A. Bernstein
- Department of Internal Medicine, Division of Rheumatology, Allergy and Immunology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Courtney Campbell
- Ohio State University Medical Centre, Department of Cardiovascular Medicine, Columbus, OH, United States
| | - Joseph Moellman
- Department of Emergency Medicine, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Debajyoti Ghosh
- Department of Internal Medicine, Division of Rheumatology, Allergy and Immunology, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | | | | | - Anoop J. Chauhan
- Research and Innovation Department, Portsmouth Hospitals University National Health Service (NHS) Trust, Portsmouth, United Kingdom
- School of Pharmacy & Biomedical Science, University of Portsmouth, Portsmouth, United Kingdom
| |
Collapse
|
9
|
Wang SH, Shan Y, Li SZ, Zuo YG. Anti-interleukin 4 receptor α antibody for the treatment of Chinese bullous pemphigoid patients with diverse comorbidities and a 1-year follow-up: a monocentric real-world study. Front Immunol 2023; 14:1165106. [PMID: 37545503 PMCID: PMC10399451 DOI: 10.3389/fimmu.2023.1165106] [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: 02/13/2023] [Accepted: 07/04/2023] [Indexed: 08/08/2023] Open
Abstract
Background Bullous pemphigoid (BP) is a common subepidermal bullous disorder that lacks adequate treatment alternatives. Dupilumab, an anti-interleukin (IL) 4 receptor α antibody blocking Th2 molecules IL-4 and 13, has been used off-label and shown to be effective in refractory BP cases. Methods BP patients with various disease severities and comorbidities were included in this case series. All patients received dupilumab alone or in combination with immunosuppressants in a real-world setting. Complete remission (CR) was defined as the absence of pruritus symptoms and previous BP eruptions, with only hyperpigmentation patches and without newly occurring lesions for at least 4 weeks. Disease relapse was classified as the appearance of three or more new lesions within 1 month or at least one large urticarial or eczematous lesion that did not resolve within a week. Findings Ten individuals were enrolled in this case series. Pruritus symptoms and BP eruptions improved significantly in nine patients (90%). Seven patients (70%) attained CR, including all mild-to-moderate (100%) cases and three of six (50%) severe BP cases. At the dupilumab monotherapy stage, eosinophilia was observed in two severe cases. One patient out of seven (14.3%) relapsed after 1 year of follow-up after CR. Conclusion Treatment of BP with diverse comorbidities with anti-IL-4 receptor α antibody provides further credentials to a prospective randomized study. More impressive efficacy and safety profiles were observed in patients with mild-to-moderate disease after 1 year of follow-up. Eosinophilia may occur in patients receiving dupilumab monotherapy.
Collapse
Affiliation(s)
- Si-Hang Wang
- Department of Dermatology, State Key Laboratory of Complex Severe and Rare Diseases, National Clinical Research Center for Dermatologic and Immunologic Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ying Shan
- Department of Dermatology, State Key Laboratory of Complex Severe and Rare Diseases, National Clinical Research Center for Dermatologic and Immunologic Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Department of Dermatology, Hebei North University, Zhangjiakou, Hebei, China
| | - Si-Zhe Li
- Department of Dermatology, State Key Laboratory of Complex Severe and Rare Diseases, National Clinical Research Center for Dermatologic and Immunologic Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Ya-Gang Zuo
- Department of Dermatology, State Key Laboratory of Complex Severe and Rare Diseases, National Clinical Research Center for Dermatologic and Immunologic Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| |
Collapse
|
10
|
Olbrich H, Sadik CD, Schmidt E. Autoimmune blistering diseases: promising agents in clinical trials. Expert Opin Investig Drugs 2023; 32:615-623. [PMID: 37526503 DOI: 10.1080/13543784.2023.2242778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 07/26/2023] [Indexed: 08/02/2023]
Abstract
INTRODUCTION Treatment options for autoimmune bullous diseases (AIBD) are currently limited to corticosteroids and traditional immunomodulants and immunosuppressants that are associated with unfavorable adverse effect profiles. The most frequent AIBDs, i.e. bullous pemphigoid, pemphigus vulgaris, and mucous membrane pemphigoid, impose a high disease burden onto affected patients and can be detrimental due to infections, exsiccosis, and impaired food intake. Significant progress has been made in elucidating disease mechanisms and key mediators by in vivo and in vitro models, thus identifying a multifaceted range of possible drug targets. However, except for rituximab for pemphigus vulgaris, no new drugs have been approved for the treatment of AIBDs in the last decades. AREAS COVERED This review covers new drug developments and includes ongoing or completed phase 2 and 3 clinical trials. Studies were identified by querying the registries of ClinicalTrials.gov and Cochrane Library. EXPERT OPINION Promising results were shown for a variety of new agents including nomacopan, efgartigimod, omalizumab, dupilumab, as well as chimeric autoantibody receptor T cells. Clinical translation in the field of AIBDs is highly active, and we anticipate significant advances in the treatment landscape.
Collapse
Affiliation(s)
- Henning Olbrich
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | | | - Enno Schmidt
- Department of Dermatology, University of Lübeck, Lübeck, Germany
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Lübeck, Germany
| |
Collapse
|
11
|
Stennett A, Friston K, Harris CL, Wollman AJM, Bronowska AK, Madden KS. The case for complement component 5 as a target in neurodegenerative disease. Expert Opin Ther Targets 2023; 27:97-109. [PMID: 36786123 DOI: 10.1080/14728222.2023.2177532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
INTRODUCTION Complement-based drug discovery is undergoing a renaissance, empowered by new advances in structural biology, complement biology and drug development. Certain components of the complement pathway, particularly C1q and C3, have been extensively studied in the context of neurodegenerative disease, and established as key therapeutic targets. C5 also has huge therapeutic potential in this arena, with its druggability clearly demonstrated by the success of C5-inhibitor eculizumab. AREAS COVERED We will discuss the evidence supporting C5 as a target in neurodegenerative disease, along with the current progress in developing different classes of C5 inhibitors and the gaps in knowledge that will help progress in the field. EXPERT OPINION Validation of C5 as a therapeutic target for neurodegenerative disease would represent a major step forward for complement therapeutics research and has the potential to furnish disease-modifying drugs for millions of patients suffering worldwide. Key hurdles that need to be overcome for this to be achieved are understanding how C5a and C5b should be targeted to bring therapeutic benefit and demonstrating the ability to target C5 without creating vulnerability to infection in patients. This requires greater biological elucidation of its precise role in disease pathogenesis, supported by better chemical/biological tools.
Collapse
Affiliation(s)
- Amelia Stennett
- School of Natural and Environmental Sciences, Newcastle University, NE1 7RU, Newcastle-Upon-Tyne, UK
| | - Kallie Friston
- School of Natural and Environmental Sciences, Newcastle University, NE1 7RU, Newcastle-Upon-Tyne, UK
| | - Claire L Harris
- Faculty of Medical Sciences, Newcastle University, NE2 4HH, Newcastle-Upon-Tyne, UK
| | - Adam J M Wollman
- Faculty of Medical Sciences, Newcastle University, NE2 4HH, Newcastle-Upon-Tyne, UK
| | - Agnieszka K Bronowska
- School of Natural and Environmental Sciences, Newcastle University, NE1 7RU, Newcastle-Upon-Tyne, UK
| | - Katrina S Madden
- School of Natural and Environmental Sciences, Newcastle University, NE1 7RU, Newcastle-Upon-Tyne, UK.,Faculty of Medical Sciences, Newcastle University, NE2 4HH, Newcastle-Upon-Tyne, UK
| |
Collapse
|
12
|
Maglie R, Solimani F, Didona D, Pipitò C, Antiga E, Di Zenzo G. The cytokine milieu of bullous pemphigoid: Current and novel therapeutic targets. Front Med (Lausanne) 2023; 10:1128154. [PMID: 36814775 PMCID: PMC9939461 DOI: 10.3389/fmed.2023.1128154] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/23/2023] [Indexed: 02/09/2023] Open
Abstract
Bullous pemphigoid (BP) is the most common autoimmune bullous disease, characterized by severe pruritus and skin blistering. The loss of tolerance against Collagen XVII, also referred to as BP180, is the main pathogenic event of BP, leading to production of IgG autoantibodies which mainly target the juxtamembranous extracellular non-collagenous 16th A (NC16A) domain of BP180. A complex inflammatory network is activated upon autoantibody binding to the basement membrane zone; this inflammatory loop involves the complement cascade and the release of several inflammatory cytokines, chemokines and proteases from keratinocytes, lymphocytes, mast cells and granulocytes. Collectively, these events disrupt the integrity of the dermal-epidermal junction, leading to subepidermal blistering. Recent advances have led to identify novel therapeutic targets for BP, whose management is mainly based on the long-term use of topical and systemic corticosteroids. As an example, targeting type-2 T-helper cell-associated cytokines, such as Interleukin-4 and interleukin-13 has shown meaningful clinical efficacy in case series and studies; targeting IL-17 and IL-23 has also been tried, owing to an important role of these cytokines in the chronic maintenance phase of BP. In this review article, we discuss the complex cytokine milieu that characterized BP inflammation, highlighting molecules, which are currently investigated as present and future therapeutic targets for this life-threatening disease.
Collapse
Affiliation(s)
- Roberto Maglie
- Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy
| | - Farzan Solimani
- Department of Dermatology, Venereology and Allergology, Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Berlin, Germany,BIH Charité Clinician Scientist Program, Berlin Institute of Health at Charité – Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, Berlin, Germany
| | - Dario Didona
- Department of Dermatology and Allergology, Philipps University, Marburg, Germany
| | - Carlo Pipitò
- Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy
| | - Emiliano Antiga
- Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy
| | - Giovanni Di Zenzo
- Laboratory of Molecular and Cell Biology, Istituto Dermopatico dell’Immacolata (IDI)-IRCCS, Rome, Italy,*Correspondence: Giovanni Di Zenzo,
| |
Collapse
|
13
|
Giang J, van Doorn MBA, Diercks GFH, de Cordoba SR, van den Bosch TPP, Schreurs MWJ, Poppelaars F, Damman J. Successful pharmacological intervention at different levels of the complement system in an in vitro complement fixation model for bullous pemphigoid. Exp Dermatol 2023; 32:632-640. [PMID: 36704908 DOI: 10.1111/exd.14755] [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: 09/29/2022] [Revised: 12/12/2022] [Accepted: 01/10/2023] [Indexed: 01/28/2023]
Abstract
Bullous pemphigoid (BP) is characterized by deposition of immunoglobulins and complement along the epidermal basement membrane (BM). In humans, there is a lack of functional studies targeting the complement system (CS). This study investigates activation of all complement pathways in BP skin biopsies. Moreover, pharmacological inhibition at different levels of the CS was investigated using anti-complement compounds in a complement fixation BP assay. In this retrospective study, 21 frozen biopsies from BP patients were stained by direct immunofluorescence for C1q, MBL, ficolin-2, C4d, properdin, C3c and C5b-9. Sera from 10 patients were analysed in a complement fixation assay in the presence of C1 inhibitor, anti-factor B monoclonal antibody (mAb), anti-C3 mAb and anti-C5 mAb and compared with dexamethasone. The two readouts were the quantity of complement deposited along the BM and the release of sC5b-9 in the supernatant. Our results show classical and alternative complement pathway activation in BP skin biopsies, but could not demonstrate significant lectin pathway activation. In contrast to dexamethasone, complement deposition along the BM could be selectively inhibited by anti-C1 and anti- factor B. More downstream, selective intervention at the level of C3 and C5 could effectively reduce complement deposition along the BM and the release of sC5b-9 in the supernatant. This study shows that selective intervention in either the classical, alternative or terminal pathway prevented deposition of complement along the BM in an in vitro BP model. The results of our study greatly encourage the clinical development of complement inhibitors for the treatment of BP.
Collapse
Affiliation(s)
- Jenny Giang
- Department of Pathology, Maasstad Hospital, Rotterdam, The Netherlands
| | - Martijn B A van Doorn
- Department of Dermatology, Erasmus Medical Center Rotterdam, Rotterdam, The Netherlands.,Centre for Human Drug Research, Leiden, The Netherlands
| | - Gilles F H Diercks
- Department of Pathology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Santiago Rodriguez de Cordoba
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Madrid, Spain.,Centro de Investigación Biomédica en Enfermedades Raras, Madrid, Spain
| | | | - Marco W J Schreurs
- Department of Immunology, Erasmus Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Felix Poppelaars
- Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Jeffrey Damman
- Department of Pathology, Erasmus Medical Center Rotterdam, Rotterdam, The Netherlands
| |
Collapse
|
14
|
Les inhibiteurs du complément : une vue d’ensemble. Rev Med Interne 2022; 43:703-712. [DOI: 10.1016/j.revmed.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 08/28/2022] [Accepted: 09/06/2022] [Indexed: 11/23/2022]
|
15
|
Papara C, Karsten CM, Ujiie H, Schmidt E, Schmidt-Jiménez LF, Baican A, Freire PC, Izumi K, Bieber K, Peipp M, Verschoor A, Ludwig RJ, Köhl J, Zillikens D, Hammers CM. The relevance of complement in pemphigoid diseases: A critical appraisal. Front Immunol 2022; 13:973702. [PMID: 36059476 PMCID: PMC9434693 DOI: 10.3389/fimmu.2022.973702] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Accepted: 07/26/2022] [Indexed: 11/13/2022] Open
Abstract
Pemphigoid diseases are autoimmune chronic inflammatory skin diseases, which are characterized by blistering of the skin and/or mucous membranes, and circulating and tissue-bound autoantibodies. The well-established pathomechanisms comprise autoantibodies targeting various structural proteins located at the dermal-epidermal junction, leading to complement factor binding and activation. Several effector cells are thus attracted and activated, which in turn inflict characteristic tissue damage and subepidermal blistering. Moreover, the detection of linear complement deposits in the skin is a diagnostic hallmark of all pemphigoid diseases. However, recent studies showed that blistering might also occur independently of complement. This review reassesses the importance of complement in pemphigoid diseases based on current research by contrasting and contextualizing data from in vitro, murine and human studies.
Collapse
Affiliation(s)
- Cristian Papara
- Department of Dermatology, University of Lübeck, Lübeck, Germany
- Department of Dermatology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Christian M. Karsten
- Institute of Systemic Inflammation Research, University of Lübeck, Lübeck, Germany
| | - Hideyuki Ujiie
- Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Enno Schmidt
- Department of Dermatology, University of Lübeck, Lübeck, Germany
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | | | - Adrian Baican
- Department of Dermatology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - Patricia C. Freire
- Institute of Systemic Inflammation Research, University of Lübeck, Lübeck, Germany
| | - Kentaro Izumi
- Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Katja Bieber
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Matthias Peipp
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian-Albrechts-University of Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Admar Verschoor
- Department of Dermatology, University of Lübeck, Lübeck, Germany
- Department of Otorhinolaryngology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany
| | - Ralf J. Ludwig
- Department of Dermatology, University of Lübeck, Lübeck, Germany
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
| | - Jörg Köhl
- Institute of Systemic Inflammation Research, University of Lübeck, Lübeck, Germany
- Division of Immunobiology, Cincinnati Children’s Hospital Medical Center and University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Detlef Zillikens
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - Christoph M. Hammers
- Department of Dermatology, University of Lübeck, Lübeck, Germany
- Lübeck Institute of Experimental Dermatology (LIED), University of Lübeck, Lübeck, Germany
- *Correspondence: Christoph M. Hammers,
| |
Collapse
|
16
|
Cole C, Vinay K, Borradori L, Amber KT. Insights Into the Pathogenesis of Bullous Pemphigoid: The Role of Complement-Independent Mechanisms. Front Immunol 2022; 13:912876. [PMID: 35874745 PMCID: PMC9300999 DOI: 10.3389/fimmu.2022.912876] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 06/09/2022] [Indexed: 11/13/2022] Open
Abstract
Bullous pemphigoid is an autoimmune blistering disease caused by autoantibodies targeting BP180 and BP230. While deposits of IgG and/or complement along the epidermal basement membrane are typically seen suggesting complement -mediated pathogenesis, several recent lines of evidence point towards complement-independent pathways contributing to tissue damage and subepidermal blister formation. Notable pathways include macropinocytosis of IgG-BP180 complexes resulting in depletion of cellular BP180, direct induction of pro-inflammatory cytokines from keratinocytes, as well as IgE autoantibody- and eosinophil-mediated effects. We review these mechanisms which open new perspectives on novel targeted treatment modalities.
Collapse
|