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Bissonnette R, DuBois J, Facheris P, Del Duca E, Kim M, Correa Da Rosa J, Trujillo DL, Bose S, Pagan AD, Wustrow D, Brockstedt DG, Wong B, Kassner PD, Jankicevic J, Ho W, Cheng LE, Guttman-Yassky E. Clinical and molecular effects of oral CCR4 antagonist RPT193 in atopic dermatitis: A Phase 1 study. Allergy 2024; 79:924-936. [PMID: 37984453 DOI: 10.1111/all.15949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/27/2023] [Accepted: 10/14/2023] [Indexed: 11/22/2023]
Abstract
BACKGROUND RPT193 is an orally administered small molecule antagonist of the human C-C motif chemokine receptor 4 (CCR4) that inhibits the migration and downstream activation of T-helper Type 2 (Th2) cells. We investigated single- and multiple-ascending doses of RPT193 in healthy subjects, and multiple doses of RPT193 in subjects with moderate-to-severe atopic dermatitis (AD). METHODS This was a first-in-human randomized, placebo-controlled Phase 1a/1b monotherapy study (NCT04271514) to evaluate the safety, tolerability, pharmacokinetics, pharmacodynamics, and CCR4 surface receptor occupancy in eligible healthy subjects and subjects with moderate-to-severe AD. Clinical efficacy and skin biomarker effects of RPT193 monotherapy were assessed as exploratory endpoints in AD subjects. RESULTS In healthy (n = 72) and AD subjects (n = 31), once-daily RPT193 treatment was generally well tolerated, with no serious adverse events reported and all treatment-emergent adverse events reported as mild/moderate. In AD subjects, numerically greater improvements in clinical efficacy endpoints were observed with RPT193 monotherapy versus placebo up to the end of the treatment period (Day 29), with statistically significant improvement, compared to Day 29 and placebo, observed 2 weeks after the end of treatment (Day 43) on several endpoints (p < .05). Moreover, significant changes in the transcriptional profile were seen in skin biopsies of RPT193-treated versus placebo-treated subjects at Day 29, which were also significantly correlated with improvements in clinical efficacy measures. CONCLUSIONS To our knowledge, this is the first clinical study with an oral CCR4 antagonist that showed clinical improvement coupled with modulation of the cutaneous transcriptomic profile in an inflammatory skin disease.
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Affiliation(s)
| | | | - Paola Facheris
- Laboratory of Inflammatory Skin Diseases, Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ester Del Duca
- Laboratory of Inflammatory Skin Diseases, Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Madeline Kim
- Laboratory of Inflammatory Skin Diseases, Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Joel Correa Da Rosa
- Laboratory of Inflammatory Skin Diseases, Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | | | - Swaroop Bose
- Laboratory of Inflammatory Skin Diseases, Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Angel D Pagan
- Laboratory of Inflammatory Skin Diseases, Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - David Wustrow
- RAPT Therapeutics, Inc., South San Francisco, California, USA
| | | | - Brian Wong
- RAPT Therapeutics, Inc., South San Francisco, California, USA
| | - Paul D Kassner
- RAPT Therapeutics, Inc., South San Francisco, California, USA
| | | | - William Ho
- RAPT Therapeutics, Inc., South San Francisco, California, USA
| | | | - Emma Guttman-Yassky
- Laboratory of Inflammatory Skin Diseases, Department of Dermatology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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Xue P, Qin H, Qin D, Liu H, Li J, Jin R, Xiao X. The efficacy and safety of oral microecological agents as add-on therapy for atopic dermatitis: A systematic review and meta-analysis of randomized clinical trials. Clin Transl Allergy 2023; 13:e12318. [PMID: 38146806 PMCID: PMC10694634 DOI: 10.1002/clt2.12318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/25/2023] [Accepted: 11/06/2023] [Indexed: 12/27/2023] Open
Abstract
BACKGROUND Atopic dermatitis (AD) is a common skin disease that is hard to completely cure in a short time. Guidelines recommend the use of topical corticosteroids (TCS) as first-line anti-inflammatory therapy for AD, but long-term use has significant side effects. Microecological agents (MA), including probiotics, prebiotics and synbiotics, have been widely reported as a potential adjunctive therapy of AD, but whether MA can contribute to AD treatment is currently controversial. Therefore, we conducted a systematic review and meta-analysis to investigate whether MA as an add-on therapy for AD has synergistic and attenuated effects and to further understand the role of MA in clinical interventions for AD. METHODS We systematically searched Medline, Embase, Web of Science, Cochrane Library and PsycINFO databases up to Apr 11, 2023, and bibliographies were also manually searched, for potentially relevant studies regarding MA as additional therapy of AD. The Cochrane Risk of Bias Tool for assessing risk of bias was used to assess the quality of randomized controlled trials (RCTs). Two reviewers screened studies, extracted data, and evaluated the risk of bias independently. The primary outcomes (SCORAD scores and the number of adverse events) and the secondary outcomes (pruritus scores, the quality of life and the frequency of TCS) were extracted from each article. The data were combined and analyzed to quantify the safety and efficacy of the treatment. R (V4.4.3) software was used for data synthesis. The certainty of the evidence was evaluated with the Grade of Recommendation, Assessment, Development and Evaluation (GRADE) system. We also performed a trial sequential analysis to assess the reliability of the evidence. RESULTS A total of 21 studies, including 1230 individuals, were identified, 20 of which met the eligibility criteria for the meta-analysis. Our pooled meta-analyses showed that compared with controls, oral MA as an add-on therapy was associated with significantly lower SCORAD scores (MD = -5.30, 95% CI -8.50, -1.55, p < 0.01, I2 = 81%). However, adverse events, pruritus scores, quality of life, and frequency of TCS use showed no significant difference in this meta-analysis study (p > 0.05). CONCLUSIONS This meta-analysis showed that MA plus TCS could be an effective and safe treatment for patients with AD to relieve relevant symptoms, which might be used as an add-on therapy in the treatment of AD. However, due to the limited number of studies, results should be interpreted with caution. Further studies with a larger sample size are needed to explore the optimal protocol of MA plus TCS.
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Affiliation(s)
- Peiwen Xue
- School of Health Preservation and RehabilitationChengdu University of Traditional Chinese MedicineChengduSichuanChina
| | - Haiyan Qin
- Acupuncture and Tuina SchoolChengdu University of Traditional Chinese MedicineChengduSichuanChina
| | - Di Qin
- Acupuncture and Tuina SchoolChengdu University of Traditional Chinese MedicineChengduSichuanChina
| | - Huilin Liu
- Acupuncture and Tuina SchoolChengdu University of Traditional Chinese MedicineChengduSichuanChina
| | - Juan Li
- School of Health Preservation and RehabilitationChengdu University of Traditional Chinese MedicineChengduSichuanChina
- Affiliated Sichuan Provincial Rehabilitation Hospital of Chengdu University of TCMChengduSichuanChina
| | - Rongjiang Jin
- School of Health Preservation and RehabilitationChengdu University of Traditional Chinese MedicineChengduSichuanChina
| | - Xianjun Xiao
- School of Health Preservation and RehabilitationChengdu University of Traditional Chinese MedicineChengduSichuanChina
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Flohr C, Rosala-Hallas A, Jones AP, Beattie P, Baron S, Browne F, Brown SJ, Gach JE, Greenblatt D, Hearn R, Hilger E, Esdaile B, Cork MJ, Howard E, Lovgren ML, August S, Ashoor F, Williamson PR, McPherson T, O'Kane D, Ravenscroft J, Shaw L, Sinha MD, Spowart C, Taams LS, Thomas BR, Wan M, Sach TH, Irvine AD. Efficacy and safety of ciclosporin versus methotrexate in the treatment of severe atopic dermatitis in children and young people (TREAT): a multicentre parallel group assessor-blinded clinical trial. Br J Dermatol 2023; 189:674-684. [PMID: 37722926 DOI: 10.1093/bjd/ljad281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 08/01/2023] [Accepted: 09/17/2023] [Indexed: 09/20/2023]
Abstract
BACKGROUND Conventional systemic drugs are used to treat children and young people (CYP) with severe atopic dermatitis (AD) worldwide, but no robust randomized controlled trial (RCT) evidence exists regarding their efficacy and safety in this population. While novel therapies have expanded therapeutic options, their high cost means traditional agents remain important, especially in lower-resource settings. OBJECTIVES To compare the safety and efficacy of ciclosporin (CyA) with methotrexate (MTX) in CYP with severe AD in the TREatment of severe Atopic Eczema Trial (TREAT) trial. METHODS We conducted a parallel group assessor-blinded RCT in 13 UK and Irish centres. Eligible participants aged 2-16 years and unresponsive to potent topical treatment were randomized to either oral CyA (4 mg kg-1 daily) or MTX (0.4 mg kg-1 weekly) for 36 weeks and followed-up for 24 weeks. Co-primary outcomes were change from baseline to 12 weeks in Objective Severity Scoring of Atopic Dermatitis (o-SCORAD) and time to first significant flare (relapse) after treatment cessation. Secondary outcomes included change in quality of life (QoL) from baseline to 60 weeks; number of participant-reported flares following treatment cessation; proportion of participants achieving ≥ 50% improvement in Eczema Area and Severity Index (EASI 50) and ≥ 75% improvement in EASI (EASI 75); and stratification of outcomes by filaggrin status. RESULTS In total, 103 participants were randomized (May 2016-February 2019): 52 to CyA and 51 to MTX. CyA showed greater improvement in disease severity by 12 weeks [mean difference in o-SCORAD -5.69, 97.5% confidence interval (CI) -10.81 to -0.57 (P = 0.01)]. More participants achieved ≥ 50% improvement in o-SCORAD (o-SCORAD 50) at 12 weeks in the CyA arm vs. the MTX arm [odds ratio (OR) 2.60, 95% CI 1.23-5.49; P = 0.01]. By 60 weeks MTX was superior (OR 0.33, 95% CI 0.13-0.85; P = 0.02), a trend also seen for ≥ 75% improvement in o-SCORAD (o-SCORAD 75), EASI 50 and EASI 75. Participant-reported flares post-treatment were higher in the CyA arm (OR 3.22, 95% CI 0.42-6.01; P = 0.02). QoL improved with both treatments and was sustained after treatment cessation. Filaggrin status did not affect outcomes. The frequency of adverse events (AEs) was comparable between both treatments. Five (10%) participants on CyA and seven (14%) on MTX experienced a serious AE. CONCLUSIONS Both CyA and MTX proved effective in CYP with severe AD over 36 weeks. Participants who received CyA showed a more rapid response to treatment, while MTX induced more sustained disease control after discontinuation.
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Affiliation(s)
- Carsten Flohr
- Department of Paediatric Dermatology, St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Anna Rosala-Hallas
- Liverpool Clinical Trials Centre, University of Liverpool, Liverpool, UK
| | - Ashley P Jones
- Liverpool Clinical Trials Centre, University of Liverpool, Liverpool, UK
| | | | - Susannah Baron
- Department of Paediatric Dermatology, St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Fiona Browne
- Paediatric Dermatology, Children's Health Ireland at Crumlin, Dublin, Ireland
| | - Sara J Brown
- Centre for Genomic and Experimental Medicine, University of Edinburgh, Edinburgh, UK
| | - Joanna E Gach
- University Hospitals Coventry and Warwickshire, Coventry, UK
| | - Danielle Greenblatt
- Department of Paediatric Dermatology, St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Ross Hearn
- Ninewells Hospital and Medical School, Dundee, UK
| | - Eva Hilger
- Department of Paediatric Dermatology, St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Ben Esdaile
- Whittington Hospital, Whittington Health NHS Trust, London, UK
| | - Michael J Cork
- Sheffield Children's NHS Foundation Trust and Sheffield Dermatology Research, Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Sheffield, UK
| | - Emma Howard
- Department of Paediatric Dermatology, St John's Institute of Dermatology, King's College London and Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Marie-Louise Lovgren
- Birmingham Children's Hospital, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, UK
| | | | - Farhiya Ashoor
- Liverpool Clinical Trials Centre, University of Liverpool, Liverpool, UK
| | - Paula R Williamson
- Liverpool Clinical Trials Centre, University of Liverpool, Liverpool, UK
| | - Tess McPherson
- Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - Donal O'Kane
- Department of Dermatology, Belfast Health and Social Care Trust, Belfast, UK
| | | | - Lindsay Shaw
- Bristol Royal Hospital for Children, Bristol, UK
| | - Manish D Sinha
- Kings College London, Department of Paediatric Nephrology, Evelina London Children's Hospital, Guy's & St Thomas's Foundation Hospitals NHS Trust, London
| | - Catherine Spowart
- Liverpool Clinical Trials Centre, University of Liverpool, Liverpool, UK
| | - Leonie S Taams
- Centre for Inflammation Biology and Cancer Immunology, King's College London, UK
| | - Bjorn R Thomas
- Royal Free Hospital and Blizard Institute, Queen Mary University London, UK
| | - Mandy Wan
- Evelina London Children's Hospital, Guys' and St Thomas' NHS Foundation Trust, London, UK
- Institute of Pharmaceutical Science, King's College London, London, UK
| | - Tracey H Sach
- Health Economics Group, Norwich Medical School, University of East Anglia, Norwich, UK
| | - Alan D Irvine
- Paediatric Dermatology, Children's Health Ireland at Crumlin, Dublin, Ireland
- Clinical Medicine, Trinity College Dublin, Ireland
- National Children's Research Centre, Crumlin, Dublin, Ireland
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Ismail M, Doelger E, Eckert D, Irvine AD, Chu AD, Teixeira HD, Liu W, Nader A. Population pharmacokinetic and exposure-response modelling to inform upadacitinib dose selection in adolescent and adult patients with atopic dermatitis. Br J Clin Pharmacol 2023; 89:3139-3151. [PMID: 37232215 DOI: 10.1111/bcp.15803] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/09/2023] [Accepted: 05/18/2023] [Indexed: 05/27/2023] Open
Abstract
AIMS First, population pharmacokinetic analyses were used to characterize upadacitinib pharmacokinetics in adolescent and adult participants with atopic dermatitis (AD) and to identify patient covariates that may impact upadacitinib pharmacokinetics. Second, the exposure-response relationship for upadacitinib with efficacy and safety endpoints, and the effect of age and concomitant use of topical corticosteroids (TCS) on the exposure-response relationship and dose selection for patients with AD were evaluated. METHODS A two-compartment model with combined first- and zero-order absorption adequately characterized the upadacitinib concentration-time profiles in 911 healthy volunteer adolescent and adult participants with AD who received upadacitinib 15 or 30 mg orally once daily (QD) as monotherapy or in combination with TCS for 16 weeks. Logistic regression models were developed to characterize the exposure-efficacy and safety relationships, and simulations were performed based on final exposure-response models to predict efficacy responses in participants with AD who received placebo or upadacitinib as monotherapy or in combination with TCS. RESULTS Upadacitinib exposures were comparable between adolescents and adults. Mild or moderate renal impairment was predicted to increase the upadacitinib area under the plasma concentration-time curve from time zero to 24 h after dosing (AUC24 ) approximately 12% and 25%, respectively, compared to participants with normal renal function. Female participants were predicted to have 20% higher AUC24 compared to male participants. Participants with AD were predicted to have 18% higher AUC24 compared to healthy participants. Simulated clinical efficacy responses showed added clinical efficacy benefit for all endpoints evaluated (8-14%) with the upadacitinib 30 mg once-daily regimen compared to 15 mg once-daily in both age groups. In participants receiving upadacitinib in combination with TCS, significant exposure-dependent increases in upadacitinib efficacy endpoints were observed. No significant effects of age or weight were identified in any of the exposure-response models. CONCLUSION The results of these analyses support the dose justification for upadacitinib in adult and adolescent patients with moderate to severe AD.
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Affiliation(s)
- Mohamed Ismail
- Clinical Pharmacology, AbbVie Inc., Chicago, Illinois, USA
| | - Eva Doelger
- Clinical Pharmacology, AbbVie Deutschland GmbH & Co KG, Ludwigshafen, Germany
| | - Doerthe Eckert
- Clinical Pharmacology, AbbVie Deutschland GmbH & Co KG, Ludwigshafen, Germany
| | - Alan D Irvine
- Clinical Medicine, Trinity College Dublin, University of Dublin, Dublin, Ireland
- Wellcome-HRB Clinical Research Facility, St James' Hospital, Dublin, Ireland
| | - Alvina D Chu
- Immunology Clinical Development, AbbVie Inc., Chicago, Illinois, USA
| | | | - Wei Liu
- Clinical Pharmacology, AbbVie Inc., Chicago, Illinois, USA
| | - Ahmed Nader
- Clinical Pharmacology, AbbVie Inc., Chicago, Illinois, USA
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Abstract
Progress in understanding of the mechanisms underlying chronic inflammatory skin disorders, such as atopic dermatitis and psoriasis vulgaris, has led to new treatment options with the primary goal of alleviating symptoms. In addition, this knowledge has the potential to inform on new strategies aimed at inducing deep and therapy-free remission, that is, disease modification, potentially impacting on associated comorbidities. However, to reach this goal, key areas require further exploration, including the definitions of disease modification and disease activity index, further understanding of disease mechanisms and systemic spillover effects, potential windows of opportunity, biomarkers for patient stratification and successful intervention, as well as appropriate study design. This Perspective article assesses the opportunities and challenges in the discovery and development of disease-modifying therapies for chronic inflammatory skin disorders.
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Affiliation(s)
- Thomas Bieber
- Department of Dermatology and Allergy, University Hospital, Bonn, Germany.
- Christine Kühne - Center for Allergy Research and Education, Davos, Switzerland.
- Davos Biosciences, Davos, Switzerland.
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Qi H, Li L, Reich A. Association of Atopic Dermatitis with Depression and Suicide: A Two-Sample Mendelian Randomization Study. BioMed Research International 2022; 2022:1-7. [PMID: 35155673 PMCID: PMC8831056 DOI: 10.1155/2022/4084121] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 01/17/2022] [Indexed: 12/15/2022]
Abstract
Background Atopic dermatitis (AD) has long been hypothesized to be associated with risk of depression and suicide, but the causal relationship between them is still unclear. Objective To evaluate the causality between AD, depression, and suicide using a Mendelian randomization (MR) approach. Method We extracted summary-level data for AD, major depression, and suicidal ideation or attempt from published, nonoverlapping genome-wide association studies (GWAS). Inverse variance-weighted (IVW) analysis was used as the primary analysis. Alternate methods, including weighted median, MR Egger, MR pleiotropy residual sum and outlier, weighted mode, and leave-out analysis, were performed to assess pleiotropy. Results 13 SNPs (13,287 cases and 41,345 controls) were selected as instrumental variables (IVs). The IVW analysis indicated a statistically significant but small causal effect of AD on major depression (OR = 1.027, 95% CI 1.004-1.050; p = 0.020). No significant evidence was observed for a causal effect of AD on suicide. No significant effect of pleiotropy was found. Conclusion AD has a significant but small effect on major depression, but not on suicide.
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Laughter MR, Maymone MBC, Mashayekhi S, Arents BWM, Karimkhani C, Langan SM, Dellavalle RP, Flohr C. The global burden of atopic dermatitis: lessons from the Global Burden of Disease Study 1990-2017. Br J Dermatol 2021; 184:304-309. [PMID: 33006135 DOI: 10.1111/bjd.19580] [Citation(s) in RCA: 182] [Impact Index Per Article: 60.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/28/2020] [Accepted: 09/28/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND The Global Burden of Disease (GBD) Study provides an annually updated resource to study disease-related morbidity and mortality worldwide. OBJECTIVES Here we present the burden estimates for atopic dermatitis (AD), including data from inception of the GBD project in 1990 until 2017. METHODS Data on the burden of AD were obtained from the GBD Study. RESULTS Atopic dermatitis (AD) ranks 15th among all nonfatal diseases and has the highest disease burden among skin diseases as measured by disability-adjusted life-years (DALYs). Overall, the global DALY rate for AD in 1990 was 121 [95% uncertainty interval (UI) 65·4-201] and remained similar in 2017 at 123 (95% UI 66·8-205). The three countries with the highest DALY rates of AD were Sweden (327, 95% UI 178-547), the UK (284, 95% UI 155-478) and Iceland (277, 95% UI 149-465), whereas Uzbekistan (85·1, 95% UI 45·2-144), Armenia (85·1, 95% UI 45·8-143) and Tajikistan (85·1, 95% UI 46·1-143) ranked lowest. CONCLUSIONS The global prevalence rate of AD has remained stable from 1990 to 2017. However, the distribution of AD by age groups shows a bimodal curve with the highest peak in early childhood, decreasing in prevalence among young adults, and a second peak in middle-aged and older populations. We also found a moderate positive correlation between a country's gross domestic product and disease burden. GBD data confirm the substantial worldwide burden of AD, which has remained stable since 1990 but shows significant geographical variation. Lifestyle factors, partially linked to affluence, are likely important disease drivers. However, the GBD methodology needs to be developed further to incorporate environmental risk factors, such as ultraviolet exposure, to understand better the geographical and age-related variations in disease burden.
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Affiliation(s)
- M R Laughter
- Department of Dermatology, University of Colorado School of Medicine, Denver, CO, USA
| | - M B C Maymone
- Department of Dermatology, University of Colorado School of Medicine, Denver, CO, USA
| | - S Mashayekhi
- Unit for Population-Based Dermatology Research, St John's Institute of Dermatology, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - B W M Arents
- Dutch Association for People with Atopic Dermatitis (VMCE), Nijkerk, the Netherlands
| | - C Karimkhani
- Department of Dermatology, University of Colorado School of Medicine, Denver, CO, USA
| | - S M Langan
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - R P Dellavalle
- Department of Dermatology, University of Colorado School of Medicine, Denver, CO, USA
| | - C Flohr
- Dutch Association for People with Atopic Dermatitis (VMCE), Nijkerk, the Netherlands
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