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Kridin K, Hübner F, Recke A, Linder R, Schmidt E. The burden of neurological comorbidities in six autoimmune bullous diseases: a population-based study. J Eur Acad Dermatol Venereol 2021; 35:2074-2078. [PMID: 34153122 DOI: 10.1111/jdv.17465] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 06/08/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Apart from bullous pemphigoid (BP), the association of other autoimmune bullous diseases (AIBDs) with neurological conditions is poorly understood. OBJECTIVE To estimate the association between a wide array of AIBDs and neurological conditions. METHODS A retrospective cross-sectional study recruited patients with BP, mucous membrane pemphigoid (MMP), epidermolysis bullosa acquisita (EBA), pemphigoid gestationis (PG), pemphigus vulgaris (PV) and pemphigus foliaceus (PF). These patients were compared with their age- and sex-matched control subjects with regard to the lifetime prevalence of Parkinson's disease (PD), Alzheimer's disease (AD), stroke, epilepsy and multiple sclerosis (MS). Logistic regression was used to calculate OR for specified neurological disorders. RESULTS The current study included 1743, 251, 106, 126, 860 and 103 patients diagnosed with BP, MMP, EBA, PG, PV and PF, respectively. These patients were compared with 10 141, 1386, 606, 933, 5142 and 588 matched controls, respectively. Out of the investigated neurological conditions, PD associated with BP (OR, 2.71; 95% CI, 2.19-3.35); AD with BP (OR, 2.11; 95% CI, 1.73-2.57), MMP (OR, 2.37; 95% CI, 1.03-5.47), EBA (OR, 6.00; 95% CI, 1.90-18.97) and PV (OR, 2.24; 95% CI, 1.40-3.60); stroke with BP (OR, 1.84; 95% CI, 1.55-2.19) and EBA (OR, 2.79; 95% CI, 1.11-7.01); and epilepsy with BP (OR, 2.18; 95% CI, 1.72-2.77) and PV (OR, 1.80; 95% CI, 1.19-2.73). MS did not significantly cluster with any of the six AIBDs. CONCLUSION In addition to BP, EBA and PV were found to cluster with neurological comorbidities. Patients with these AIBDs with compatible symptoms may be carefully assessed for comorbid neurological disorders.
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Affiliation(s)
- K Kridin
- Lűbeck Institute of Experimental Dermatology, University of Lübeck, Lübeck, Germany.,Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel.,Unit of Dermatology and Skin Research Laboratory, Baruch Padeh Poria Medical Center, Tiberias, Israel
| | - F Hübner
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - A Recke
- Department of Dermatology, University of Lübeck, Lübeck, Germany
| | - R Linder
- Techniker Krankenkasse, Corporate Development, Analytics and Insights, Hamburg, Germany
| | - E Schmidt
- Lűbeck Institute of Experimental Dermatology, University of Lübeck, Lübeck, Germany.,Department of Dermatology, University of Lübeck, Lübeck, Germany
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Kridin K, Zelber-Sagi S, Comaneshter D, Cohen AD. Association Between Pemphigus and Neurologic Diseases. JAMA Dermatol 2019; 154:281-285. [PMID: 29453873 DOI: 10.1001/jamadermatol.2017.5799] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Importance The association between pemphigus and neurologic diseases was not evaluated systematically in the past. In a recent uncontrolled cross-sectional study, Parkinson disease was found to be significantly associated with pemphigus; in the same study, epilepsy had a nonsignificant association with pemphigus. Several case reports have suggested that pemphigus coexists with multiple sclerosis and dementia. Objective To estimate the association between pemphigus and 4 neurologic conditions (dementia, epilepsy, Parkinson disease, and multiple sclerosis), using one of the largest cohorts of patients with pemphigus. Design, Setting, and Participants A retrospective population-based cross-sectional study was performed between January 1, 2004, and December 31, 2014, using the database of Clalit Health Services, the largest public health care organization in Israel, in the setting of general community clinics, primary care and referral centers, and ambulatory and hospitalized care. A total of 1985 patients with a new diagnosis of pemphigus and 9874 controls were included in the study. Main Outcomes and Measures The proportion of dementia, epilepsy, Parkinson disease, and multiple sclerosis was compared between patients diagnosed with pemphigus and age-, sex-, and ethnicity-matched control participants. Logistic regression was used to calculate odds ratios (ORs) for dementia, epilepsy, Parkinson disease, and multiple sclerosis. The association was examined after a sensitivity analysis that included only patients treated with long-term, pemphigus-specific medications (corticosteroids, immunosuppressants, or rituximab) and after adjustment for several confounding factors. Results When comparing the 1985 cases (1188 women and 797 men; mean [SD] age, 72.1 [18.5] years) with the 9874 controls (5912 women and 3962 men; mean [SD] age, 72.1 [18.5] years), dementia was seen in 622 cases (31.3%) vs 1856 controls (18.8%), with an OR of 1.97 (95% CI, 1.77-2.20). Epilepsy was present in 74 cases (3.7%) vs 210 controls (2.1%), with an OR of 1.78 (95% CI, 1.36-2.33). Parkinson disease was seen in 175 cases (8.8%) vs 437 controls (4.4%), with an OR of 2.09 (95% CI, 1.74-2.51). Multiple sclerosis was present in 2 cases (0.1%) vs 6 controls (0.01%), with an OR of 1.65 (95% CI, 0.34-8.22). Study findings were robust to sensitivity analysis that included patients receiving pemphigus-specific treatments. Estimates were not altered significantly after controlling for comorbidities and overuse of health care. Conclusions and Relevance An association was observed between pemphigus and specific neurologic diseases, including dementia, Parkinson disease, and epilepsy. Physicians treating patients with pemphigus should be aware of this possible association. Patients with pemphigus should be carefully assessed for comorbid neurologic disorders and receive appropriate treatment.
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Affiliation(s)
- Khalaf Kridin
- Department of Dermatology, Rambam Health Care Campus, Haifa, Israel
| | - Shira Zelber-Sagi
- School of Public Health, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel
| | - Doron Comaneshter
- Department of Quality Measurements and Research, Chief Physician's Office, Clalit Health Services, Tel Aviv, Israel
| | - Arnon D Cohen
- Department of Quality Measurements and Research, Chief Physician's Office, Clalit Health Services, Tel Aviv, Israel.,Siaal Research Center for Family Medicine and Primary Care, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheeva, Israel
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Association between schizophrenia and an autoimmune bullous skin disease-pemphigus: a population-based large-scale study. Epidemiol Psychiatr Sci 2019; 28:191-198. [PMID: 28942756 PMCID: PMC6998929 DOI: 10.1017/s204579601700052x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
AIMS Immunological hypotheses have become increasingly prominent suggesting that autoimmunity may be involved in the pathogenesis of schizophrenia. Schizophrenia was found to be associated with a wide range of autoimmune diseases. However, the association between pemphigus and schizophrenia has not been established yet. We aimed to estimate the association between pemphigus and schizophrenia using a large-scale real-life computerised database. METHODS This study was conducted as a cross-sectional study utilising the database of Clalit Health Services. The proportion of schizophrenia was compared between patients diagnosed with pemphigus and age-, gender- and ethnicity-matched control subjects. Univariate analysis was performed using χ2 and Student's t-test and a multivariate analysis was performed using a logistic regression model. RESULTS A total of 1985 pemphigus patients and 9874 controls were included in the study. The prevalence of schizophrenia was greater in patients with pemphigus as compared to the control group (2.0% v. 1.3%, respectively; p = 0.019). In a multivariate analysis, pemphigus was significantly associated with schizophrenia (OR, 1.5; 95% CI, 1.1-2.2). The association was more prominent among females, patients older than 60 years, and Jews. CONCLUSIONS Pemphigus is significantly associated with schizophrenia. Physicians treating patients with pemphigus should be aware of this possible association. Patients with pemphigus should be carefully assessed for comorbid schizophrenia and be treated appropriately.
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Kridin K, Zelber-Sagi S, Comaneshter D, Cohen AD. Bipolar Disorder Associated with Another Autoimmune Disease-Pemphigus: A Population-based Study. CANADIAN JOURNAL OF PSYCHIATRY. REVUE CANADIENNE DE PSYCHIATRIE 2018; 63:474-480. [PMID: 29108425 PMCID: PMC6099770 DOI: 10.1177/0706743717740344] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVES Recent evidence suggests a notable role for inflammation and immune dysregulation in the neuroprogression of bipolar disorders (BD). Several autoimmune comorbidities have been reported in association with BD. However, the epidemiological relationship between pemphigus and BD has not yet been elucidated. We aimed to estimate the association between pemphigus and BD using a large-scale, real-life computerized database. METHODS Data for this study were retrieved from the database of the Clalit Health Services, the largest, state-mandated, health service organization in Israel. This study was designed as a cross-sectional study. The proportion of patients with BD was compared between patients diagnosed with pemphigus and age-, sex-, and ethnicity-matched control subjects. A logistic regression model was performed to estimate how pemphigus and other covariates contributed as risk factors for BD. RESULTS A total of 1,985 pemphigus cases and 9,874 controls were included in the study. The prevalence of BD was greater in cases with pemphigus than in controls (1.0% v. 0.5%, respectively; P = 0.023). This coexistence was more prominent among patients of Jewish ethnicity. After controlling for confounders, such as age, sex, ethnicity, socioeconomic status, drug abuse, alcohol abuse, smoking, healthcare utilization, and comorbidities, pemphigus demonstrated a substantial independent association with BD (OR, 1.7; 95% CI, 1.0 to 2.9). CONCLUSIONS Pemphigus is significantly associated with BD. Patients with pemphigus should be assessed for comorbid BD. Experimental research is needed to better recognize the biological mechanisms underlying this observation.
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Affiliation(s)
- Khalaf Kridin
- Department of Dermatology, Rambam Health Care Campus, Haifa, Israel
- Khalaf Kridin MD, Department of Dermatology, Rambam Health Care Campus, POB 9602 Haifa 31096, Israel.
| | - Shira Zelber-Sagi
- School of Public Health, Faculty of Social Welfare and Health Sciences, University of Haifa, Haifa, Israel
| | - Doron Comaneshter
- Department of Quality Measurements and Research, Chief Physician’s Office, Clalit Health Services, Tel Aviv, Israel
| | - Arnon D. Cohen
- Department of Quality Measurements and Research, Chief Physician’s Office, Clalit Health Services, Tel Aviv, Israel
- Siaal Research Center for Family Medicine and Primary Care, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
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Apostolova LG, Risacher SL, Duran T, Stage EC, Goukasian N, West JD, Do TM, Grotts J, Wilhalme H, Nho K, Phillips M, Elashoff D, Saykin AJ. Associations of the Top 20 Alzheimer Disease Risk Variants With Brain Amyloidosis. JAMA Neurol 2018; 75:328-341. [PMID: 29340569 PMCID: PMC5885860 DOI: 10.1001/jamaneurol.2017.4198] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 10/19/2017] [Indexed: 01/28/2023]
Abstract
Importance Late-onset Alzheimer disease (AD) is highly heritable. Genome-wide association studies have identified more than 20 AD risk genes. The precise mechanism through which many of these genes are associated with AD remains unknown. Objective To investigate the association of the top 20 AD risk variants with brain amyloidosis. Design, Setting, and Participants This study analyzed the genetic and florbetapir F 18 data from 322 cognitively normal control individuals, 496 individuals with mild cognitive impairment, and 159 individuals with AD dementia who had genome-wide association studies and 18F-florbetapir positron emission tomographic data from the Alzheimer's Disease Neuroimaging Initiative (ADNI), a prospective, observational, multisite tertiary center clinical and biomarker study. This ongoing study began in 2005. Main Outcomes and Measures The study tested the association of AD risk allele carrier status (exposure) with florbetapir mean standard uptake value ratio (outcome) using stepwise multivariable linear regression while controlling for age, sex, and apolipoprotein E ε4 genotype. The study also reports on an exploratory 3-dimensional stepwise regression model using an unbiased voxelwise approach in Statistical Parametric Mapping 8 with cluster and significance thresholds at 50 voxels and uncorrected P < .01. Results This study included 977 participants (mean [SD] age, 74 [7.5] years; 535 [54.8%] male and 442 [45.2%] female) from the ADNI-1, ADNI-2, and ADNI-Grand Opportunity. The adenosine triphosphate-binding cassette subfamily A member 7 (ABCA7) gene had the strongest association with amyloid deposition (χ2 = 8.38, false discovery rate-corrected P < .001), after apolioprotein E ε4. Significant associations were found between ABCA7 in the asymptomatic and early symptomatic disease stages, suggesting an association with rapid amyloid accumulation. The fermitin family homolog 2 (FERMT2) gene had a stage-dependent association with brain amyloidosis (FERMT2 × diagnosis χ2 = 3.53, false discovery rate-corrected P = .05), which was most pronounced in the mild cognitive impairment stage. Conclusions and Relevance This study found an association of several AD risk variants with brain amyloidosis. The data also suggest that AD genes might differentially regulate AD pathologic findings across the disease stages.
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Affiliation(s)
- Liana G. Apostolova
- Department of Neurology, School of Medicine, Indiana University, Indianapolis
- Department of Radiology and Imaging Sciences, Center for Neuroimaging, School of Medicine, Indiana University, Indianapolis
- Department of Medical and Molecular Genetics, School of Medicine, Indiana University, Indianapolis
| | - Shannon L. Risacher
- Department of Radiology and Imaging Sciences, Center for Neuroimaging, School of Medicine, Indiana University, Indianapolis
| | - Tugce Duran
- Department of Neurology, School of Medicine, Indiana University, Indianapolis
| | - Eddie C. Stage
- Department of Neurology, School of Medicine, Indiana University, Indianapolis
| | - Naira Goukasian
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - John D. West
- Department of Radiology and Imaging Sciences, Center for Neuroimaging, School of Medicine, Indiana University, Indianapolis
| | - Triet M. Do
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Jonathan Grotts
- Department of Medicine Statistics Core, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Holly Wilhalme
- Department of Medicine Statistics Core, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Kwangsik Nho
- Department of Radiology and Imaging Sciences, Center for Neuroimaging, School of Medicine, Indiana University, Indianapolis
| | - Meredith Phillips
- Department of Neurology, School of Medicine, Indiana University, Indianapolis
| | - David Elashoff
- Department of Medicine Statistics Core, David Geffen School of Medicine at UCLA, Los Angeles, California
| | - Andrew J. Saykin
- Department of Radiology and Imaging Sciences, Center for Neuroimaging, School of Medicine, Indiana University, Indianapolis
- Department of Medical and Molecular Genetics, School of Medicine, Indiana University, Indianapolis
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Murphy S, Brinkmeier H, Krautwald M, Henry M, Meleady P, Ohlendieck K. Proteomic profiling of the dystrophin complex and membrane fraction from dystrophic mdx muscle reveals decreases in the cytolinker desmoglein and increases in the extracellular matrix stabilizers biglycan and fibronectin. J Muscle Res Cell Motil 2017; 38:251-268. [DOI: 10.1007/s10974-017-9478-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 08/05/2017] [Indexed: 01/14/2023]
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Buyl K, Vanhaecke T, Desmae T, Lagneaux L, Rogiers V, Najar M, De Kock J. Evaluation of a new standardized enzymatic isolation protocol for human umbilical cord-derived stem cells. Toxicol In Vitro 2015; 29:1254-62. [DOI: 10.1016/j.tiv.2014.12.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 11/12/2014] [Accepted: 12/03/2014] [Indexed: 02/07/2023]
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Abstract
Desmosomes are morphologically and biochemically defined cell-cell junctions that are required for maintaining the mechanical integrity of skin and the heart in adult mammals. Furthermore, since mice with null mutations in desmosomal plaque proteins (plakoglobin and desmoplakin) die in utero, it is also evident that desmosomes are indispensable for normal embryonic development. This review focuses on the role of desmosomes in vivo. We will summarize the effects of mutations in desmosomal genes on pre- and post-embryonic development of mouse and man and discuss recent findings relating to the specific role of desmosomal cadherins in skin differentiation and homeostasis.
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Affiliation(s)
- Xing Cheng
- Department of Dermatology, Baylor College of Medicine, Houston, TX 77030, USA
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9
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Abstract
Desmosomes are intercellular adhesive junctions that are particularly prominent in tissues experiencing mechanical stress, such as the heart and epidermis. Whereas the related adherens junction links actin to calcium-dependent adhesion molecules known as classical cadherins, desmosomes link intermediate filaments (IF) to the related subfamily of desmosomal cadherins. By tethering these stress-bearing cytoskeletal filaments to the plasma membrane, desmosomes serve as integrators of the IF cytoskeleton throughout a tissue. Recent evidence suggests that IF attachment in turn strengthens desmosomal adhesion. This collaborative arrangement results in formation of a supracellular network, which is critical for imparting mechanical integrity to tissues. Diseases and animal models targeting desmosomal components highlight the importance of desmosomes in development and tissue integrity, while the downregulation of individual protein components in cancer metastasis and wound healing suggests their importance in cell homeostasis. This chapter will provide an update on desmosome composition, function, and regulation, and will also discuss recent work which raises the possibility that desmosome proteins do more than play a structural role in tissues where they reside.
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10
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Kljuic A, Bauer RC, Christiano AM. Genomic Organization of Mouse Desmocollin Genes Reveals Evolutionary Conservation. ACTA ACUST UNITED AC 2009; 15:148-52. [PMID: 15346771 DOI: 10.1080/10425170410001679156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Desmosomal cadherins are a family of calcium regulated proteins involved in the formation of desmosomes, a type of cell junction important in maintaining cell adhesion and tissue stability. The desmosomal plaque consists of members of the desmosomal cadherin, plakin and armadillo family of proteins. Desmosomal cadherins are transmembrane glycoproteins that interact with desmosomal cadherins of the adjacent cells via their extracellular repeat domains and are divided in two subfamilies, the desmogleins (Dsg) and the desmocollins (Dsc). On the cytoplasmic side, the cadherins connect to the intermediate filament (IF) network indirectly by interacting with plakin and armadillo proteins. Here, we report the elucidation of the genomic structure of two mouse desmocollin genes, Dsc2 and Dsc3. Interestingly, at the genomic level, desmocollins show a higher degree of similarity to the classical cadherins, such as E-cadherin, than to the desmogleins.
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Affiliation(s)
- Ana Kljuic
- Departments of Dermatology and Genetics & Development, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, VC-1526, New York, NY, USA
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Donetti E, Bedoni M, Capone P, Gualerzi A, Tartaglia G, Sforza C. Anin vitromodel of human oral explants to study early effects of radiation mucositis. Eur J Oral Sci 2009; 117:169-74. [DOI: 10.1111/j.1600-0722.2009.00614.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Wilanowski T, Caddy J, Ting SB, Hislop NR, Cerruti L, Auden A, Zhao LL, Asquith S, Ellis S, Sinclair R, Cunningham JM, Jane SM. Perturbed desmosomal cadherin expression in grainy head-like 1-null mice. EMBO J 2008; 27:886-97. [PMID: 18288204 DOI: 10.1038/emboj.2008.24] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2007] [Accepted: 01/31/2008] [Indexed: 11/09/2022] Open
Abstract
In Drosophila, the grainy head (grh) gene plays a range of key developmental roles through the regulation of members of the cadherin gene family. We now report that mice lacking the grh homologue grainy head-like 1 (Grhl1) exhibit hair and skin phenotypes consistent with a reduction in expression of the genes encoding the desmosomal cadherin, desmoglein 1 (Dsg1). Grhl1-null mice show an initial delay in coat growth, and older mice exhibit hair loss as a result of poor anchoring of the hair shaft in the follicle. The mice also develop palmoplantar keratoderma, analogous to humans with DSG1 mutations. Sequence analysis, DNA binding, and chromatin immunoprecipitation experiments demonstrate that the human and mouse Dsg1 promoters are direct targets of GRHL1. Ultrastructural analysis reveals reduced numbers of abnormal desmosomes in the interfollicular epidermis. These findings establish GRHL1 as an important regulator of the Dsg1 genes in the context of hair anchorage and epidermal differentiation, and suggest that cadherin family genes are key targets of the grainy head-like genes across 700 million years of evolution.
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Affiliation(s)
- Tomasz Wilanowski
- Rotary Bone Marrow Research Laboratories, Melbourne Health Research Directorate, Royal Melbourne Hospital, Parkville, Victoria, Australia
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Holthöfer B, Windoffer R, Troyanovsky S, Leube RE. Structure and function of desmosomes. ACTA ACUST UNITED AC 2007; 264:65-163. [PMID: 17964922 DOI: 10.1016/s0074-7696(07)64003-0] [Citation(s) in RCA: 150] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Desmosomes are prominent adhesion sites that are tightly associated with the cytoplasmic intermediate filament cytoskeleton providing mechanical stability in epithelia and also in several nonepithelial tissues such as cardiac muscle and meninges. They are unique in terms of ultrastructural appearance and molecular composition with cell type-specific variations. The dynamic assembly properties of desmosomes are important prerequisites for the acquisition and maintenance of tissue homeostasis. Disturbance of this equilibrium therefore not only compromises mechanical resilience but also affects many other tissue functions as becomes evident in various experimental scenarios and multiple diseases.
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Affiliation(s)
- Bastian Holthöfer
- Department of Anatomy and Cell Biology, Johannes Gutenberg University, 55128 Mainz, Germany
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Vinken M, Papeleu P, Snykers S, De Rop E, Henkens T, Chipman JK, Rogiers V, Vanhaecke T. Involvement of cell junctions in hepatocyte culture functionality. Crit Rev Toxicol 2006; 36:299-318. [PMID: 16809101 DOI: 10.1080/10408440600599273] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In liver, like in other multicellular systems, the establishment of cellular contacts is a prerequisite for normal functioning. In particular, well-defined cell junctions between hepatocytes, including adherens junctions, desmosomes, tight junctions, and gap junctions, are known to play key roles in the performance of liver-specific functionality. In a first part of this review article, we summarize the current knowledge concerning cell junctions and their roles in hepatic (patho)physiology. In a second part, we discuss their relevance in liver-based in vitro modeling, thereby highlighting the use of primary hepatocyte cultures as suitable in vitro models for preclinical pharmaco-toxicological testing. We further describe the actual strategies to regain and maintain cell junctions in these in vitro systems over the long-term.
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Affiliation(s)
- Mathieu Vinken
- Department of Toxicology, Vrije Universiteit Brussel (VUB), Brussels, Belgium.
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15
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Bazzi H, Martinez-Mir A, Kljuic A, Christiano AM. Desmoglein 4 mutations underlie localized autosomal recessive hypotrichosis in humans, mice, and rats. J Investig Dermatol Symp Proc 2006; 10:222-4. [PMID: 16382669 DOI: 10.1111/j.1087-0024.2005.10110.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A newly defined form of inherited hair loss, named localized autosomal recessive hypotrichosis (LAH, OMIM 607903), was recently described in the literature and shown to be linked to chromosome 18. A large, intragenic deletion in the desmoglein 4 gene (DSG4) as the underlying mutation in several unrelated families of Pakistani origin. LAH is an autosomal recessive form of hypotrichosis affecting the scalp, trunk, and extremities, and largely sparing the facial, pubic, and axillary hair. Typical hairs are fragile and break easily, leaving short sparse scalp hairs with a characteristic appearance. Using comparative genomics, we also demonstrated that human LAH is allelic with the lanceolate hair (lah) mouse, as well as the lanceolate hair (lah) rat phenotype. Together, these models provide new information about the role of desmosomal cadherins in disease, and serve as in vivo models for functional and mechanistic studies into the role of desmoglein 4 in the skin and hair follicle.
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Affiliation(s)
- Hisham Bazzi
- Departments of Dermatology and Genetics & Development, Columbia University, New York, New York, USA
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16
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Mahoney MG, Hu Y, Brennan D, Bazzi H, Christiano AM, Wahl JK. Delineation of diversified desmoglein distribution in stratified squamous epithelia: implications in diseases. Exp Dermatol 2006; 15:101-9. [PMID: 16433681 DOI: 10.1111/j.1600-0625.2006.00391.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Desmogleins play critical roles in cell adhesion and skin blistering diseases, as they are the target antigens of autoimmune antibodies and bacterial toxins. We recently cloned several novel members of the desmoglein gene family, bringing the number of desmogleins to four in the rat and human genomes and six in the mouse. Here, we have produced a monoclonal antibody to a cytoplasmic epitope of Dsg4, assessed its specificity and compared it to several existing Dsg1-3 antibodies. We also demonstrated cross-reactivity of commercially available and often used Dsg1 antibodies. Using these tools, we delineated the unique expression patterns of each desmoglein isoform in various human and mouse stratified squamous epithelia, including skin, hair, palm, and oral mucosa. Interestingly, in the epidermis, the expression of each desmoglein correlates with their gene arrangement in the cadherin locus. In human, Dsg4 was detected primarily in the granular and cornified cell layers of the epidermis, while present throughout all differentiated layers of the oral mucosa and palm, and in the matrix cells of anagen hair bulb. Similar pattern of expression for Dsg4 was observed in mouse, with the exception that it was expressed at significantly lower levels in the mouse epidermis. These results demonstrate the complexity of desmoglein gene expression and provide additional insights into the correlation between tissue expression patterns and disease phenotypes.
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Affiliation(s)
- My G Mahoney
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA.
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Nishifuji K, Fudaba Y, Yamaguchi T, Iwasaki T, Sugai M, Amagai M. Cloning of swine desmoglein 1 and its direct proteolysis by Staphylococcus hyicus exfoliative toxins isolated from pigs with exudative epidermitis. Vet Dermatol 2005; 16:315-23. [PMID: 16238811 DOI: 10.1111/j.1365-3164.2005.00474.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Exudative epidermitis (EE) is an acute, often fatal skin disease of piglets caused by Staphylococcus hyicus. Clinical and histopathological manifestations of EE are similar to those of staphylococcal scalded skin syndrome (SSSS), a human blistering skin disease, in which exfoliative toxins produced by Staphylococcus aureus digest the extracellular domains of desmoglein (Dsg) 1 and cause loss of epidermal cell-cell adhesion. The aims of this study were to isolate and characterize cDNA for full length of swine Dsg1, and to determine whether the extracellular domains of swine Dsg1 produced by baculovirus (sDsg1-His) could be digested by four isoforms of exfoliative toxin produced by S. hyicus (ExhA, ExhB, ExhC and ExhD). Nucleotide sequencing revealed that swine Dsg1 cDNA consisted of an open reading frame of 3138 bp, encoding a precursor protein of 1045 amino acids. Deduced amino acid sequence of the swine Dsg1 precursor were highly homologous to corresponding bovine, canine, human and murine sequences. Immunoadsorption assay with a secreted form of sDsg1-His revealed that sDsg1-His specifically absorbs the immunoreactivity of 10 human pemphigus foliaceus sera against swine keratinocyte cell surfaces, suggesting its proper conformation. When sDsg1-His was incubated in vitro with Exhs, all four isoforms of Exh directly digested sDsg1-His into smaller peptides, whereas removal of calcium from sDsg1-His completely inhibited its proteolysis by these four Exhs. Recognition and digestion of calcium-stabilized structure on the extracellular domains of swine Dsg1 by Exhs indicated that EE shares similar molecular pathophysiological mechanisms of intra-epidermal splitting with SSSS in humans.
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Affiliation(s)
- Koji Nishifuji
- Department of Dermatology, Keio University School of Medicine, Tokyo, Japan.
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18
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Brennan D, Hu Y, Kljuic A, Choi Y, Joubeh S, Bashkin M, Wahl J, Fertala A, Pulkkinen L, Uitto J, Christiano AM, Panteleyev A, Mahoney MG. Differential structural properties and expression patterns suggest functional significance for multiple mouse desmoglein 1 isoforms. Differentiation 2005; 72:434-49. [PMID: 15606502 DOI: 10.1111/j.1432-0436.2004.07208009.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The four isoforms of desmosomal cadherin desmogleins (Dsg1-4) are expressed in epithelial tissues in a differentiation-specific manner. Extensive sequencing of the human genome has revealed only one copy of the Dsg1 gene. However, we recently cloned two novel additional mouse Dsg1 genes, Dsg1-beta and -gamma, which flank the original Dsg1-alpha on chromosome 18. Sequence conservation between the Dsg1 isoforms diverged significantly at exon 11, particularly in the region that encodes for the extracellular anchoring (EA) domains. Computational analysis revealed very low hydrophilic potential of the Dsg1-gamma EA compared with the corresponding sequences of Dsg1-alpha and -beta, suggesting that the Dsg1-gamma EA domain may have a stronger affinity to the cell membrane. We generated antibodies using synthetic peptides or recombinant proteins localized within the EA domains. These antibodies were tested for their specificity and were then used to demonstrate expression of Dsg1 isoforms in various tissues. In the epidermis, all Dsg1 isoforms were differentially expressed in the differentiating cell layers. In the hair follicle, all Dsg1 isoforms were present throughout the entire process of its development and cycling but the expression of Dsg1 isoforms is subject to significant hair cycle-dependent changes. Dsg1-beta and -gamma, but not Dsg1-alpha, were detected in the sebaceous gland epithelium and the stratified epithelium of the stomach. Finally, Dsg1-alpha and Dsg1-beta, but not Dsg1-gamma, are proteolytically cleaved by exfoliative toxin A. These results suggest that the developmental complexity of mouse tissues, including skin and hair, may play a significant role in the evolutionary driving force to maintain multiple Dsg1 genes in mouse.
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Affiliation(s)
- Donna Brennan
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, PA, USA
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19
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Donetti E, Bedoni M, Boschini E, Dellavia C, Barajon I, Gagliano N. Desmocollin 1 and desmoglein 1 expression in human epidermis and keratinizing oral mucosa: a comparative immunohistochemical and molecular study. Arch Dermatol Res 2005; 297:31-8. [PMID: 15926049 DOI: 10.1007/s00403-005-0573-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2004] [Revised: 02/09/2005] [Accepted: 04/19/2005] [Indexed: 02/06/2023]
Abstract
Epidermis and keratinizing oral mucosa (KOM) are effective barriers against a wide spectrum of insults. The optimal form of protection provided by each epithelium is determined also by the molecular composition of desmosomes. Up to now, the expression of the "skin type" desmosomal cadherins, i.e. desmocollin 1 (Dsc1) and desmoglein 1 (Dsg1), was correlated with the morphological features of keratinocyte terminal differentiation in epidermis, but not in KOM. The aim of the present study was to investigate Dsc1 and Dsg1 expression in adult human KOM compared to epidermis. Biopsies of epidermis and KOM were obtained from young healthy adults (n=6) and simultaneously processed for immunofluorescence analysis, post-embedding immunogold electron microscopy (immunogold EM), and RT-PCR analysis. For molecular biology analysis, as a negative control, we considered human fibroblasts. By immunofluorescence and immunogold EM, Dsc1 labeling was not detected in any suprabasal layer of KOM, but it was present in the upper spinous/granular layers of epidermis. Immunofluorescence and transmission electron microscopy analysis showed that (i) Dsg1 expression was evident in the spinous, granular, and horny layer of the oral epithelium and (ii) Dsg1 immunoreactivity was always lower in desmosomes between oral keratinocytes than in all epidermal junctions. RT-PCR analysis confirmed that in KOM Dsc1 gene expression was undetectable. On the whole, these observations suggest a weakened adhesion in KOM, allowing oral keratinocytes to undergo a faster transition throughout the living layers of the epithelium. The intrinsic and specific regulation of the molecular composition of desmosomes can contribute in defining a specific keratinocyte phenotype in KOM and in epidermis.
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Affiliation(s)
- Elena Donetti
- Department of Human Morphology, Universitá degli Studi di Milano, Via Mangiagalli 31, 20133 Milan, Italy.
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20
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Meyer B, Bazzi H, Zidek V, Musilova A, Pravenec M, Kurtz TW, Nurnberg P, Christiano AM. A spontaneous mutation in the desmoglein 4 gene underlies hypotrichosis in a new lanceolate hair rat model. Differentiation 2005; 72:541-7. [PMID: 15617564 DOI: 10.1111/j.1432-0436.2004.07209007.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A recessive hairless mutation arose spontaneously in a congenic line of spontaneously hypertensive rats SHR.BN-(D1Mit3-Igf2)/Ipcv. The mutant rats develop generalized alopecia except for partial hair growth on their heads. Affected animals of the congenic line were crossed with LEW rats and randomly bred for several generations. A genome scan in 74 affected and 75 unaffected offspring localized the mutant gene on rat chromosome 18p12, near the marker D18Rat107, which is closely linked to the desmosomal cadherin gene cluster, syntenic to mouse chromosome 18 and human chromosome 18q12. Recently, the mouse and rat phenotypes lah/lah (lanceolate hair) and lah(J)/lah(J)(lanceolate hair-J) were found to be caused by mutations in the desmoglein 4 (Dsg4) gene. Direct sequencing of the Dsg4 gene in the SHR revealed a homozygous C-to-T transition generating a premature termination codon within exon 8 in the affected animals. Further studies on the skin histology in affected rats demonstrated features consistent with a lanceolate hair mutation, providing further support for the crucial role of desmoglein 4 in hair shaft differentiation.
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Affiliation(s)
- Birgit Meyer
- Gene Mapping Center, Max Delbruck Center for Molecular Medicine, Berlin, Germany
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21
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Hardman MJ, Liu K, Avilion AA, Merritt A, Brennan K, Garrod DR, Byrne C. Desmosomal cadherin misexpression alters beta-catenin stability and epidermal differentiation. Mol Cell Biol 2005; 25:969-78. [PMID: 15657425 PMCID: PMC544013 DOI: 10.1128/mcb.25.3.969-978.2005] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Desmosomal adhesion is important for the integrity and protective barrier function of the epidermis and is disregulated during carcinogenesis. Strong adhesion between keratinocytes is conferred by the desmosomal cadherins, desmocollin (Dsc) and desmoglein. These constitute two gene families, members of which are differentially expressed in epidermal strata. It has been suggested that this stratum-specific expression regulates keratinocyte differentiation. We tested this hypothesis by misdirecting the expression of the basally abundant desmosomal cadherins Dsc3a and Dsc3b to suprabasal differentiating keratinocytes in transgenic mice. No phenotype was apparent until adulthood, when mice developed variable ventral alopecia and had altered keratinocyte differentiation within affected areas. The follicular changes were reminiscent of changes in transgenic mice with an altered beta-catenin stability. Stabilized beta-catenin and increased beta-catenin transcriptional activity were demonstrated in transgenic mice prior to the phenotypic change and in transgenic keratinocytes as a consequence of transgene expression. Hence, a link between desmosomal cadherins and beta-catenin stability and signaling was demonstrated, and it was shown that desmocollin cadherin expression can affect keratinocyte differentiation. Furthermore, the first function for a "b-type" desmocollin cadherin was demonstrated.
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Affiliation(s)
- Matthew J Hardman
- Clinical Sciences Research Centre, University of London, 2 Newark St., London E1 2AT, United Kingdom
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22
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Abstract
Defects in desmosome-mediated cell-cell adhesion can lead to tissue fragility syndromes. Both inherited and acquired diseases caused by desmosomal defects have been described. The two organs that appear most vulnerable to these defects are the skin with its appendages, and the heart. Furthermore, the analysis of genetically engineered mice has led to the discovery that desmosomal proteins are also required for normal embryonic development. Knockout mice for several desmosomal proteins die in utero. Depending on the protein studied, death occurs either around the time of implantation, at mid-gestation or shortly before birth. So far, it appears that structural defects leading to abnormal histo-architecture and tissue fragility are the main cause of death, i.e. there is no evidence that loss of a desmosomal protein would abort specific cell lineages or differentiation programs. Nevertheless, we are only beginning to understand the functions of individual desmosomal proteins during development. This review focuses on the role of desmosomes during mouse embryonic development.
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Affiliation(s)
- Xing Cheng
- Department of Dermatology, Baylor College of Medicine, Houston, TX 77030, USA
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23
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Descargues P, Deraison C, Bonnart C, Kreft M, Kishibe M, Ishida-Yamamoto A, Elias P, Barrandon Y, Zambruno G, Sonnenberg A, Hovnanian A. Spink5-deficient mice mimic Netherton syndrome through degradation of desmoglein 1 by epidermal protease hyperactivity. Nat Genet 2004; 37:56-65. [PMID: 15619623 DOI: 10.1038/ng1493] [Citation(s) in RCA: 269] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2004] [Accepted: 11/23/2004] [Indexed: 11/09/2022]
Abstract
Mutations in SPINK5, encoding the serine protease inhibitor LEKTI, cause Netherton syndrome, a severe autosomal recessive genodermatosis. Spink5(-/-) mice faithfully replicate key features of Netherton syndrome, including altered desquamation, impaired keratinization, hair malformation and a skin barrier defect. LEKTI deficiency causes abnormal desmosome cleavage in the upper granular layer through degradation of desmoglein 1 due to stratum corneum tryptic enzyme and stratum corneum chymotryptic enzyme-like hyperactivity. This leads to defective stratum corneum adhesion and resultant loss of skin barrier function. Profilaggrin processing is increased and implicates LEKTI in the cornification process. This work identifies LEKTI as a key regulator of epidermal protease activity and degradation of desmoglein 1 as the primary pathogenic event in Netherton syndrome.
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Affiliation(s)
- Pascal Descargues
- INSERM U563, Paul Sabatier University, Place du Dr Baylac, 31059 Toulouse, cedex 3, France
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24
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Nagasaka T, Nishifuji K, Ota T, Whittock NV, Amagai M. Defining the pathogenic involvement of desmoglein 4 in pemphigus and staphylococcal scalded skin syndrome. J Clin Invest 2004; 114:1484-92. [PMID: 15545999 PMCID: PMC525737 DOI: 10.1172/jci20480] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2003] [Accepted: 09/21/2004] [Indexed: 01/17/2023] Open
Abstract
Desmogleins (Dsgs), cadherin-type cell adhesion molecules, are targeted in skin-blistering diseases such as pemphigus and staphylococcal scalded skin syndrome (SSSS). The role of Dsg4, a new isoform, was investigated in these diseases. Dsg4 was recognized by 30 (77%) of 39 pemphigus sera containing anti-Dsg1 IgG but not by 16 pemphigus sera containing no anti-Dsg1 IgG or by 34 normal control sera. The Dsg4 immunoreactivity of these sera was abolished by removal of anti-Dsg1 IgG. Conversely, the removal of anti-Dsg4 IgG from pemphigus sera reduced the immunoreactivity against Dsg1 only 13.8% +/- 8.8% (n = 23) and did not affect its ability to induce blisters in neonatal mice. IgG that was affinity-purified on Dsg4 recognized Dsg1 but failed to induce blisters, while IgG purified on Dsg1 from the same pemphigus foliaceus sera induced blisters. Thus, pemphigus sera show Dsg4 reactivity due to cross-reactivity of a subset of anti-Dsg1 IgG, and the Dsg4/Dsg1-cross-reacting IgG has no demonstrable pathogenic effect. In addition, Dsg4 was not cleaved by exfoliative toxins that induce blisters in SSSS. These findings suggest that Dsg4 may play a role other than adhesion and that the cross-reactivity of desmoglein autoantibodies should be factored into the framework of future studies of autoimmune mechanisms in pemphigus.
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Affiliation(s)
- Takeshi Nagasaka
- Department of Dermatology, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
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25
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Smith C, Zhu K, Merritt A, Picton R, Youngs D, Garrod D, Chidgey M. Regulation of desmocollin gene expression in the epidermis: CCAAT/enhancer-binding proteins modulate early and late events in keratinocyte differentiation. Biochem J 2004; 380:757-65. [PMID: 15030314 PMCID: PMC1224228 DOI: 10.1042/bj20040077] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2004] [Revised: 02/20/2004] [Accepted: 03/19/2004] [Indexed: 11/17/2022]
Abstract
Desmocollins (Dscs) are desmosomal cadherins that exhibit differentiation-specific patterns of expression in the epidermis. Dsc3 expression is strongest in basal cell layers, whereas Dsc1 is largely confined to upper, terminally differentiating strata. To understand better the processes by which Dsc expression is regulated in the epidermis, we have isolated Dsc3 and Dsc1 5'-flanking DNAs and analysed their activity in primary keratinocytes. In the present study, we found that transcription factors of the CCAAT/enhancer-binding protein family play a role in the regulation of expression of both Dscs and, in so doing, implicate this class of transcription factors in both early and late events in keratinocyte differentiation. We show that Dscs are differentially regulated by C/EBP (CCAAT/enhancer-binding protein) family members, with Dsc3 expression being activated by C/EBPbeta but not C/EBPalpha, and the reverse being the case for Dsc1. Expression of both Dscs is activated by another family member, C/EBPdelta. These results show for the first time how desmosomal cadherin gene expression is regulated and provide a mechanism for the control of other differentiation-specific genes in the epidermis.
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Affiliation(s)
- Conrad Smith
- Division of Medical Sciences, University of Birmingham, Clinical Research Block, Queen Elizabeth Hospital, Birmingham B15 2TH, UK
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26
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Hanakawa Y, Li H, Lin C, Stanley JR, Cotsarelis G. Desmogleins 1 and 3 in the Companion Layer Anchor Mouse Anagen Hair to the Follicle. J Invest Dermatol 2004; 123:817-22. [PMID: 15482466 DOI: 10.1111/j.0022-202x.2004.23479.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Anchorage of the hair to its follicle is of paramount importance for survival of rodents in the wild, and is aberrant in some human alopecias. Little is understood about the mechanisms responsible for hair shaft anchorage. Desmoglein (Dsg)3-/- (knockout) mice lose hair during telogen, but their anagen hairs remain anchored to the follicle. We hypothesized that Dsg1 compensates for the loss of Dsg3 in the anagen hair follicles of these Dsg3-/- mice. Consistent with this hypothesis, we found Dsg1 and Dsg3 expression overlapping in the companion layer. To functionally address this hypothesis, we used exfoliative toxin A (ETA) to inactivate Dsg1 in Dsg3-/- mice. Four hours after injection of ETA, Dsg3-/- mice, but not Dsg3+/+ or Dsg3+/- mice, showed striking loss of anagen hair, which was confirmed and quantitated by gentle tape stripping. Histology of the skin of these mice as well as of the tape-stripped hair showed separation between the outer root sheath and inner root sheath of the hair follicle, at the plane of the companion layer. Immunostaining for trichohyalin and K6, which highlights the companion layer, in skin and stripped hair confirmed the plane of separation. Labeling of proliferating cells with bromodeoxyuridine demonstrated that the matrix keratinocytes responsible for producing the hair shaft were below the split and remained in the follicle after loss of the anagen hair. These findings demonstrate the importance of the companion layer, and particularly the Dsg1 and Dsg3 in this layer, in anchoring the anagen hair to the follicle.
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Affiliation(s)
- Yasushi Hanakawa
- Department of Dermatology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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27
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Rafiq MA, Ansar M, Mahmood S, Haque S, Faiyaz-ul-Haque M, Leal SM, Ahmad W. A recurrent intragenic deletion mutation in DSG4 gene in three Pakistani families with autosomal recessive hypotrichosis. J Invest Dermatol 2004; 123:247-8. [PMID: 15191570 PMCID: PMC6157275 DOI: 10.1111/j.0022-202x.2004.22715.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - Muhammad Ansar
- Department of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
| | - Saqib Mahmood
- Department of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
| | - Sayedul Haque
- Department of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
| | - Muhammad Faiyaz-ul-Haque
- Program in Genetics and Genomic Biology, Department of Genetics, Hospital for Sick Children, Toronto, Canada
| | - Suzanne M. Leal
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Wasim Ahmad
- Department of Biological Sciences, Quaid-I-Azam University, Islamabad, Pakistan
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28
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Jahoda CAB, Kljuic A, O'Shaughnessy R, Crossley N, Whitehouse CJ, Robinson M, Reynolds AJ, Demarchez M, Porter RM, Shapiro L, Christiano AM. The lanceolate hair rat phenotype results from a missense mutation in a calcium coordinating site of the desmoglein 4 gene. Genomics 2004; 83:747-56. [PMID: 15081105 DOI: 10.1016/j.ygeno.2003.11.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2003] [Accepted: 11/21/2003] [Indexed: 11/29/2022]
Abstract
Desmosomal cadherins are essential cell adhesion molecules present throughout the epidermis and other organs, whose major function is to provide mechanical integrity and stability to epithelial cells in a wide variety of tissues. We recently identified a novel desmoglein family member, Desmoglein 4 (Dsg4), using a positional cloning approach in two families with localized autosomal recessive hypotrichosis (LAH) and in the lanceolate hair (lah) mouse. In this study, we report cloning and identification of the rat Dsg4 gene, in which we discovered a missense mutation in a naturally occurring lanceolate hair (lah) rat mutant. Phenotypic analysis of lah/lah mutant rats revealed a striking hair shaft defect with the appearance of a lance head within defective hair shafts. The mutation disrupts a critical calcium binding site bridging the second and third extracellular domains of Dsg4, likely disrupting extracellular interactions of the protein.
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Affiliation(s)
- Colin A B Jahoda
- School of Biomedical and Biological Sciences, University of Durham, Durham, United Kingdom
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29
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Getsios S, Huen AC, Green KJ. Working out the strength and flexibility of desmosomes. Nat Rev Mol Cell Biol 2004; 5:271-81. [PMID: 15071552 DOI: 10.1038/nrm1356] [Citation(s) in RCA: 240] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Spiro Getsios
- Department of Pathology, Robert H. Lurie Cancer Center, Northwestern University Feinberg School of Medicine, 303 East Chicago Avenue, Chicago, Illinois 60611, USA
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30
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Kljuic A, Bazzi H, Sundberg JP, Martinez-Mir A, O'Shaughnessy R, Mahoney MG, Levy M, Montagutelli X, Ahmad W, Aita VM, Gordon D, Uitto J, Whiting D, Ott J, Fischer S, Gilliam TC, Jahoda CAB, Morris RJ, Panteleyev AA, Nguyen VT, Christiano AM. Desmoglein 4 in hair follicle differentiation and epidermal adhesion: evidence from inherited hypotrichosis and acquired pemphigus vulgaris. Cell 2003; 113:249-60. [PMID: 12705872 DOI: 10.1016/s0092-8674(03)00273-3] [Citation(s) in RCA: 267] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Cell adhesion and communication are interdependent aspects of cell behavior that are critical for morphogenesis and tissue architecture. In the skin, epidermal adhesion is mediated in part by specialized cell-cell junctions known as desmosomes, which are characterized by the presence of desmosomal cadherins, known as desmogleins and desmocollins. We identified a cadherin family member, desmoglein 4, which is expressed in the suprabasal epidermis and hair follicle. The essential role of desmoglein 4 in skin was established by identifying mutations in families with inherited hypotrichosis, as well as in the lanceolate hair mouse. We also show that DSG4 is an autoantigen in pemphigus vulgaris. Characterization of the phenotype of naturally occurring mutant mice revealed disruption of desmosomal adhesion and perturbations in keratinocyte behavior. We provide evidence that desmoglein 4 is a key mediator of keratinocyte cell adhesion in the hair follicle, where it coordinates the transition from proliferation to differentiation.
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Affiliation(s)
- Ana Kljuic
- Department of Genetics and Development, Columbia University, New York, NY 10032, USA
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