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1.
Cutis ; 113(4): 185-190, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38820106

RESUMO

Alopecia areata (AA) is managed with prolonged medical treatments and cosmetic therapies, whose cost can be burdensome. We sought to identify the costs of AA treatment and consolidate the available data for the practicing dermatologist by performing a PubMed search of articles indexed for MEDLINE. Ten studies including approximately 16,000 patients with AA across a range of Oxford Centre for Evidence-Based Medicine Levels of Evidence were included. Studies showed that despite the limited efficacy of many AA therapies, patients incurred substantial expenses to manage their AA.


Assuntos
Alopecia em Áreas , Efeitos Psicossociais da Doença , Alopecia em Áreas/economia , Alopecia em Áreas/terapia , Alopecia em Áreas/tratamento farmacológico , Humanos , Custos de Cuidados de Saúde/estatística & dados numéricos , Dermatologistas/economia , Fármacos Dermatológicos/economia , Fármacos Dermatológicos/administração & dosagem , Fármacos Dermatológicos/uso terapêutico
3.
Rev Med Suisse ; 20(859): 241-246, 2024 Jan 31.
Artigo em Francês | MEDLINE | ID: mdl-38299954

RESUMO

Janus kinase inhibitors (JAKi) are small molecules which prevent the phosphorylation of JAKs, thereby blocking the intracellular phosphorylation cascade required for the transcription of several cytokines. In addition to approved indications that have been extensively studied, including atopic dermatitis, alopecia areata, vitiligo and psoriasis, JAKi are also proposed off-label, included topically, in several dermatological conditions where standard treatments are often disappointing, such as hidradenitis suppurativa (HS), extensive morphea, cutaneous sarcoidosis and lichen planus. On the other hand, the wide mechanism of action on cytokine blockade implies a safety profile that requires a case-by-case assessment of the risk/benefit ratio before their introduction.


Les inhibiteurs de Janus kinases (JAKi) sont de petites molécules empêchant la phosphorylation des JAK et bloquant ainsi la cascade de phosphorylation intracellulaire nécessaire à la transcription de plusieurs cytokines. Au-delà des indications approuvées ayant fait sujets de larges études, dont la dermatite atopique, la pelade, le vitiligo et le psoriasis, les JAKi sont aussi proposés off-label y compris en formulation topique dans plusieurs pathologies dermatologiques où les traitements habituellement utilisés sont souvent décevants : maladie de Verneuil, morphées étendues, sarcoïdose cutanée, lichen plan. En revanche, le mécanisme d'action assez large sur le blocage cytokinique implique un profil de sécurité nécessitant une évaluation cas pour cas du ratio risques/bénéfices avant leur introduction.


Assuntos
Alopecia em Áreas , Dermatite Atópica , Dermatologia , Inibidores de Janus Quinases , Humanos , Inibidores de Janus Quinases/farmacologia , Inibidores de Janus Quinases/uso terapêutico , Alopecia em Áreas/tratamento farmacológico , Citocinas
4.
Acta Derm Venereol ; 103: adv12445, 2023 Aug 25.
Artigo em Inglês | MEDLINE | ID: mdl-37622204

RESUMO

Alopecia areata is an autoimmune disorder characterized by hair loss, for which there are few treatment options. This claims-based study characterized recent real-world treatment patterns among patients in the USA with alopecia areata, including the subtypes alopecia totalis and alopecia universalis, in the first year after diagnosis of an episode of alopecia areata. Approximately 5% of all patients (adults (age ≥ 18 years), n = 7,703; adolescents (age 12-17 years), n = 595) had alopecia totalis or alopecia universalis. Corticosteroids were the most common first-line (1L) and second-line (2L) treatments. The mean time from diagnosis of alopecia areata to initiation of 1L treatment was 2.2 days for adults and 2.6 days for adolescents; mean 1L duration was 76.9 and 64.3 days, respectively. For adults (57.5%) and adolescents (59.7%) with 2L therapy, the mean time from 1L discontinuation to 2L initiation was 57.2 and 53.6 days, respectively; the mean duration of 2L treatment was 55.5 and 50.1 days, respectively. More patients with vs without alopecia totalis or alopecia universalis initiated 2L therapy (adults: 71.9% vs 56.8%; adolescents: 71.4% vs 58.9%). The proportion of days covered during the first year post-diagnosis was 36.7% (adults) and 34.1% (adolescents). These results highlight the substantial disease burden of alopecia areata and a need for more effective treatments.


Assuntos
Alopecia em Áreas , Adolescente , Adulto , Humanos , Estados Unidos/epidemiologia , Criança , Alopecia em Áreas/diagnóstico , Alopecia em Áreas/tratamento farmacológico , Alopecia em Áreas/epidemiologia , Revisão da Utilização de Seguros , Estudos Retrospectivos
5.
J Manag Care Spec Pharm ; 29(7): 848-856, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37219075

RESUMO

Alopecia areata (AA) is an autoimmune disease with a complex pathophysiology resulting in nonscarring hair loss in genetically susceptible individuals. We aim to provide health care decision makers an overview of the pathophysiology of AA, its causes and diagnosis, disease burden, costs, comorbidities, and information on current and emerging treatment options to help inform payer benefit design and prior authorization decisions. Literature searches for AA were conducted using PubMed between 2016 and 2022 inclusive, using search terms covering the causes and diagnosis of AA, pathophysiology, comorbidities, disease management, costs, and impact on quality of life (QoL). AA is a polygenic autoimmune disease that significantly impacts QoL. Patients with AA face economic burden and an increased prevalence of psychiatric disease, as well as numerous systemic comorbidities. AA is predominantly treated using corticosteroids, systemic immunosuppressants, and topical immunotherapy. Currently, there are limited data to reliably inform effective treatment decisions, particularly for patients with extensive disease. However, several novel therapies that specifically target the immunopathology of AA have emerged, including Janus kinase (JAK) 1/2 inhibitors such as baricitinib and deuruxolitinib, and the JAK3/tyrosine kinase expressed in hepatocellular carcinoma (TEC) family kinase inhibitor ritlecitinib. To support disease management, a disease severity classification tool, the Alopecia Areata Severity Scale, was recently developed that evaluates patients with AA holistically (extent of hair loss and other factors). AA is an autoimmune disease often associated with comorbidities and poor QoL, which poses a significant economic burden for payers and patients. Better treatments are needed for patients, and JAK inhibitors, among other approaches, may address this tremendous unmet medical need. DISCLOSURES: Dr King reports seats on advisory boards for and/or is a consultant and/or clinical trial investigator for AbbVie, Aclaris Therapeutics Inc, AltruBio Inc, Almirall, Arena Pharmaceuticals, Bioniz Therapeutics, Bristol Meyers Squibb, Concert Pharmaceuticals Inc, Dermavant Sciences Inc, Eli Lilly and Company, Equillium, Incyte Corp, Janssen Pharmaceuticals, LEO Pharma, Otsuka/Visterra Inc, Pfizer, Regeneron, Sanofi Genzyme, TWi Biotechnology Inc, and Viela Bio; and speakers bureaus for AbbVie, Incyte, LEO Pharma, Pfizer, Regeneron, and Sanofi Genzyme. Pezalla is a paid consultant to Pfizer for market access and payer strategy concerns; Fung, Tran, Bourret, Takiya, Peeples-Lamirande, and Napatalung are employees of Pfizer and hold stock in Pfizer. This article was funded by Pfizer.


Assuntos
Alopecia em Áreas , Inibidores de Janus Quinases , Humanos , Estados Unidos/epidemiologia , Alopecia em Áreas/tratamento farmacológico , Alopecia em Áreas/epidemiologia , Qualidade de Vida , Programas de Assistência Gerenciada , Inibidores de Janus Quinases/uso terapêutico , Inibidores de Proteínas Quinases/uso terapêutico , Efeitos Psicossociais da Doença , Preparações Farmacêuticas
6.
J Invest Dermatol ; 143(7): 1133-1137.e12, 2023 07.
Artigo em Inglês | MEDLINE | ID: mdl-37115113

RESUMO

Although progress has been made in developing outcome measures for AA, the use of these measures remains unstandardized. A scoping review was conducted to identify the clinician-reported outcome measures (ClinROMs) and patient-reported outcome measures (PROMs) used in assessing and treating AA, the results of which revealed heterogeneity in AA outcome measures. Of 23 research studies ultimately included, only 2 ClinROMs were used by >15% of studies; likewise, of 110 clinical trials evaluated, numerous outcome instruments were used, but only one ClinROM was used by >5% of trials (Severity of Alopecia Tool). These results suggest the need for consensus and standardization in both research and trial settings.


Assuntos
Alopecia em Áreas , Humanos , Alopecia em Áreas/terapia , Alopecia em Áreas/tratamento farmacológico , Alopecia/diagnóstico , Alopecia/terapia , Avaliação de Resultados em Cuidados de Saúde , Medidas de Resultados Relatados pelo Paciente , Psicometria
7.
J Manag Care Spec Pharm ; 29(4): 409-419, 2023 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-36989453

RESUMO

BACKGROUND: Alopecia areata (AA) is an autoimmune disease characterized by nonscarring hair loss. AA frequently co-occurs with other inflammatory autoimmune conditions, presenting a significant clinical burden. OBJECTIVE: To compare the burden of illness, direct and indirect costs in adult patients with AA vs atopic dermatitis (AD). METHODS: This retrospective cohort study used US administrative claims data from the Merative MarketScan Commercial Claims and Encounters Database to compare commercially insured adults with AA to those with AD. Patients with an AA diagnosis between January 2017 and September 2019 were propensity score matched to patients with AD. Comorbidity burden, medication use, health care resource utilization, health care costs, and indirect costs during a 12-month follow-up period were compared between cohorts. RESULTS: Overall, 25,446 adult patients with AA were selected for the matched analysis with the AD cohort. Patients with AA generally had lower comorbidity burden than patients with AD; mean Deyo-Charlson Comorbidity Index scores were 0.36 (SD = 0.99) and 0.39 (SD = 0.92), for AA and AD, respectively (P = 0.007). Patients with AA had significantly lower proportions of allergic rhinitis, asthma, pruritus, skin infections, and urticaria, but higher proportions of thyroid disease, when compared with patients with AD (all P < 0.001). A smaller proportion of patients with AA had prescriptions for topical (45.3% vs 64.8%; P < 0.001) and oral (20.3% vs 29.6%; P < 0.001) corticosteroids and antianxiety and/or antidepressants (24.7% vs 29.7%; P < 0.001), but a significantly larger proportion for intralesional corticosteroids (triamcinolone) (49.6% vs 21.7%; P < 0.001), compared with patients with AD. Despite a lower comorbidity burden and generally less medication usage in patients with AA, total all-cause health care costs did not significantly differ between the AA and AD cohorts ($10,705 vs $10,816; P = 0.712), and outpatient costs were higher in patients with AA ($6,297 vs $5,859; P = 0.014). Female patients with AA had significantly greater costs for both outpatient and outpatient pharmacy when compared with female patients with AD. Patients with AA were more likely to have a claim for long-term disability (0.6% vs 0.3%; P = 0.001) and higher long-term disability-associated indirect costs ($73 [SD = $1,442] vs $25 [SD = $774]; P = 0.004) compared with patients with AD. CONCLUSIONS: We found similar total health care costs in patients with AA and AD, despite a lower proportion of comorbidities and prescription use in patients with AA. Outpatient costs were also significantly higher overall in patients with AA. Although often dismissed as a cosmetic condition, AA, an autoimmune disease, has a similar level of medical expenditure as AD. DISCLOSURES: This study was funded by Eli Lilly and Company. Mr Fenske and Drs Ding, Morrow, and Smith are employed by Eli Lilly and Company. Drs Manjelievskaia, Moynihan, and Silver are employed by Merative. Drs Manjelievskaia, Moynihan, and Silver were employed by IBM Watson Health at the time of study completion. IBM Watson Health received funding from Eli Lilly and Company to conduct this study.


Assuntos
Alopecia em Áreas , Dermatite Atópica , Adulto , Humanos , Feminino , Estados Unidos/epidemiologia , Dermatite Atópica/tratamento farmacológico , Dermatite Atópica/epidemiologia , Estudos Retrospectivos , Alopecia em Áreas/tratamento farmacológico , Alopecia em Áreas/epidemiologia , Prata/uso terapêutico , Custos de Cuidados de Saúde , Efeitos Psicossociais da Doença , Corticosteroides/uso terapêutico
9.
Arch Dermatol Res ; 314(5): 487-489, 2022 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-33403573

RESUMO

Alopecia areata (AA) is a psychologically distressing disorder for which few reliable treatments exist. Although oral tofacitinib has demonstrated efficacy in treating AA, it is not approved by the Food and Drug Administration (FDA) for this indication. To investigate and identify the challenges associated with securing insurance approval for oral tofacitinib for AA. We conducted a retrospective review of patient records from two academic medical centers to identify patients with AA in whom insurance approval was sought for oral tofacitinib from 2015-2019. We recorded information on prior authorization (PA) submissions, appeals, and peer-to-peer reviews. We noted whether patients were documented to experience negative impact on mood/QOL or suicidal ideation (SI) due to their disease. We identified 37 patients in whom insurance approval was sought for oral tofacitinib for the treatment of AA. PAs were initially denied for 36/37 (97%) patients. The most commonly cited reason for denial was "tofacitinib not covered for AA/off-label medication use" (n = 26/36; 72%). 26/37 (70%) patients ultimately failed to obtain coverage. Of the 11 (30%) patients who obtained coverage, 10 (91%) were privately insured, 0 (0%) had Medicare and 1 (9%) had Medicaid. 13 patients (34%) experienced documented diminished QOL/mood (including SI) due to their disease burden; 6/13 (46%) of these patients eventually secured insurance approval. Lack of FDA approval of oral tofacitinib for the treatment of AA creates challenges in caring for patients with this disease. Policymakers should consider the negative implications lack of FDA approval may have for patients with recalcitrant dermatologic conditions.


Assuntos
Alopecia em Áreas , Seguro , Idoso , Alopecia em Áreas/tratamento farmacológico , Humanos , Medicare , Piperidinas , Pirimidinas , Pirróis/uso terapêutico , Qualidade de Vida , Estudos Retrospectivos , Estados Unidos
10.
Adv Ther ; 38(9): 4646-4658, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-34292518

RESUMO

INTRODUCTION: Alopecia areata (AA) is an autoimmune disorder causing sudden, non-scarring hair loss. There are currently no drugs approved for AA treatment. This study assessed prevalence of comorbidities, treatments, and healthcare costs and resource utilization among patients with AA in the USA. METHODS: Patients diagnosed with AA between January 2011 and December 2018 were identified in IBM MarketScan® Research Databases. Eligible patients had no other hair loss-related disorders and were continuously enrolled with medical and pharmacy benefits at least 12 months before and after AA diagnosis. Descriptive statistics were used to summarize comorbid conditions, treatments related to AA or other autoimmune/inflammatory conditions, and all-cause and AA-specific healthcare costs and resource utilization identified from claims data. RESULTS: A total of 68,121 patients with AA were identified. Mean (SD) age was 40.3 (17.8) years and 61.0% were female. The most common comorbidities included hyperlipidemia (22.4%), hypertension (21.8%), thyroid disorders (13.1%), contact dermatitis or eczema (10.8%), depression (9.5%), and anxiety (8.4%). Comorbid autoimmune diseases included atopic dermatitis (2.8%), psoriasis (2.1%), chronic urticaria (1.5%), and rheumatoid arthritis (1.1%). During the 12-month follow-up period, 37,995 patients (55.8%) were prescribed treatment for their AA or other comorbid autoimmune/inflammatory disease; 44.9% of treated patients were prescribed therapy within 7 days of AA diagnosis. Of patients receiving treatment, 80.3% received topical steroids and 30.0% received oral steroids. Mean (SD) total healthcare costs were $11,241.21 ($43,839.69) for all-causes and $419.12 ($1534.99) for AA. AA-related expenses were driven by outpatient and prescription costs. CONCLUSION: Patients with AA have a high comorbidity burden and lack of treatment. Current AA treatments, including systemic therapies other than oral steroids, were not frequently utilized in this study population. Healthcare costs incurred by patients with AA went beyond AA-related expenses. Longitudinal data are needed to better understand treatment trajectories and the disease burden in patients with AA.


Assuntos
Alopecia em Áreas , Seguro , Adulto , Alopecia em Áreas/tratamento farmacológico , Alopecia em Áreas/epidemiologia , Comorbidade , Feminino , Custos de Cuidados de Saúde , Humanos , Aceitação pelo Paciente de Cuidados de Saúde , Estudos Retrospectivos
12.
Br J Dermatol ; 183(4): 702-709, 2020 10.
Artigo em Inglês | MEDLINE | ID: mdl-31970750

RESUMO

BACKGROUND: Content-valid and clinically meaningful instruments are required to evaluate outcomes of therapeutic interventions in alopecia areata (AA). OBJECTIVES: To develop an Investigator's Global Assessment (IGA) to interpret treatment response in AA treatment studies. METHODS: Qualitative interviews were conducted in the USA with expert dermatologists and with patients with AA who had experienced ≥ 50% scalp-hair loss. Thematic data analysis identified critical outcomes and evaluated the content validity of the new IGA. RESULTS: Expert clinicians (n = 10) judged AA treatment success by the amount of scalp-hair growth (median 80% scalp hair). Adult (n = 25) and adolescent (n = 5) patients participated. Scalp-hair loss was the most bothersome AA sign/symptom for most patients. Perceived treatment success - short of 100% scalp hair - was the presence of ~ 70-90% scalp hair (median 80%). Using additional clinician and patient insights, the Alopecia Areata Investigator Global Assessment (AA-IGA™) was developed. This clinician-reported outcome assessment is an ordinal, static measure comprising five severity categories of scalp-hair loss. Nearly all clinicians and patients in this study agreed that, for patients with ≥ 50% scalp-hair loss, successful treatment would be hair regrowth resulting in ≤ 20% scalp-hair loss. CONCLUSIONS: We recommend using the Severity of Alopecia Tool to assess the extent (0-100%) of scalp-hair loss. The AA-IGA is a robust ordinal measure providing distinct and clinically meaningful gradations of scalp-hair loss that reflects patients' and expert clinicians' perspectives and treatment expectations. What is already known about this topic? The Severity of Alopecia Tool is widely used to assess the extent of scalp-hair loss in patients with alopecia areata. Guidelines define treatment success as a 50% improvement in scalp hair, and clinical trials have used dynamic thresholds of 50% and 90%. However, there is no clinical consensus on these endpoints, and patient perspectives on treatment success are unknown. What does this study add? Through qualitative interviews with 10 expert dermatologists and 30 patients with alopecia areata who had experienced ≥ 50% scalp-hair loss, we developed the Alopecia Areata Investigator Global Assessment (AA-IGA™) to measure five clinically meaningful gradations of alopecia areata scalp-hair loss that reflects patients' and clinicians' perspectives and expectations of treatment success in alopecia areata treatment studies. What are the clinical implications of this work? The AA-IGA is a robust ordinal measure that can inform clinical evaluation of alopecia areata treatment outcomes. The AA-IGA can be used to determine clinically meaningful treatment success for alopecia areata, with success defined by patients and clinicians as reaching ≤ 20% scalp-hair loss. Linked Comment: Blome. Br J Dermatol 2020; 183:609.


Assuntos
Alopecia em Áreas , Adolescente , Adulto , Alopecia , Alopecia em Áreas/tratamento farmacológico , Cabelo , Humanos , Couro Cabeludo
13.
Turk J Med Sci ; 50(8): 1817-1824, 2020 12 17.
Artigo em Inglês | MEDLINE | ID: mdl-31655499

RESUMO

Background/aim: Alopecia areata (AA) is an inflammatory disease with a genetic and autoimmune basis. Herein, it was aimed to study the efficacy and safety of an immunomodulatory therapeutic agent, diphenylcyclopropenone, while manifesting its association with histopathological features, prognostic factors, and side effects. Materials and methods: In this retrospective study, 98 patients (60 males, 38 females) with alopecia, who were referred to the Hair Disease Polyclinic at the Department of Dermatology, between 2011 and 2015, were included. Together with medical histories and dermatological examinations, a skin biopsy for histopathological examination was conducted for all of the patients prior to therapy. Therapeutic success was evaluated on the basis of the hair regrowth percentage. Results: Regarding the overall treatment success, 33 (34%) patients had complete response, 16 (16%) had partial response (between 50% and 99%), 27 (28%) had minimal response (between 1% and 49%), and 22 (22%) were nonresponders. Both sexs were equally represented in the outcome. Conclusions: There was a significant relation between the severity of alopecia and the treatment outcome (P = 0.038). Patients with AA had significantly better response when compared to those with alopecia totalis and universalis. There was no statistically significant relation with other parameters, such as disease duration, age, sex, atopy history, age of onset, and histopathological features.


Assuntos
Alopecia em Áreas/tratamento farmacológico , Ciclopropanos/farmacologia , Adolescente , Adulto , Criança , Pré-Escolar , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento , Adulto Jovem
15.
JAMA Dermatol ; 155(4): 475-479, 2019 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-30649133

RESUMO

Importance: Alopecia areata (AA) is an autoimmune disease characterized by hair loss that can impose a substantial psychological burden on patients, including major depressive disorder (MDD), yet many patients report mental health symptoms prior to the onset of AA. As such, there may be an association between MDD and AA that acts in both directions. Objective: To assess the bidirectional association between MDD and AA. Design, Setting, and Participants: This population-based retrospective cohort study included patients 10 to 90 years of age registered with The Health Improvement Network in general practices in the United Kingdom between January 1, 1986, and May 16, 2012. Statistical analysis was conducted from August 17, 2017, to April 23, 2018. To assess the risk of AA, the following 2 cohorts were defined: patients with an incident diagnosis of MDD (exposure) and a reference general population cohort. To assess the risk of MDD, the following 2 cohorts were defined: patients with an incident diagnosis of AA (exposure) and a reference general population cohort. Person-time was partitioned into unexposed and exposed time in the exposure cohorts. Main Outcomes and Measures: In the analysis of the risk of AA, development of incident AA during follow-up was considered the main outcome measure. In the analysis of the risk of MDD, development of incident MDD during follow-up was considered the primary outcome measure. Results: In the analysis of the risk of AA, 405 339 patients who developed MDD (263 916 women and 141 423 men; median age, 36.7 years [interquartile range, 26.6-50.5 years]) and 5 738 596 patients who did not develop MDD (2 912 201 women and 2 826 395 men; median age, 35.8 years [interquartile range, 25.3-52.6 years]) were followed up for 26 years. After adjustment for covariates, MDD was found to increase the risk of subsequently developing AA by 90% (hazard ratio, 1.90; 95% CI, 1.67-2.15; P < .001). Antidepressants demonstrated a protective effect on the risk of AA (hazard ratio, 0.57; 95% CI, 0.53-0.62; P < .001). In the analysis of the risk of MDD, 6861 patients who developed AA (3846 women and 3015 men; median age, 31.5 years [interquartile range, 18.2 years]) and 6 137 342 patients who did not develop AA (3 172 371 women and 2 964 971 men; median age, 35.9 years [interquartile range, 27.0 years]) were followed up for 26 years. After adjustment for covariates, AA was found to increase the risk of subsequently developing MDD by 34% (hazard ratio, 1.34; 95% CI, 1.23-1.46; P < .001). Conclusions and Relevance: These temporal analyses suggest that, while patients with AA are at risk for subsequently developing MDD, having MDD also appears to be a significant risk factor for development of AA, with antidepressant use confounding this risk.


Assuntos
Alopecia em Áreas/diagnóstico , Alopecia em Áreas/epidemiologia , Antidepressivos/administração & dosagem , Transtorno Depressivo Maior/diagnóstico , Transtorno Depressivo Maior/epidemiologia , Fármacos Dermatológicos/administração & dosagem , Adolescente , Adulto , Distribuição por Idade , Idoso , Idoso de 80 Anos ou mais , Alopecia em Áreas/tratamento farmacológico , Estudos de Coortes , Comorbidade , Bases de Dados Factuais , Transtorno Depressivo Maior/tratamento farmacológico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência , Prognóstico , Modelos de Riscos Proporcionais , Estudos Retrospectivos , Índice de Gravidade de Doença , Distribuição por Sexo , Reino Unido , Adulto Jovem
17.
Artigo em Inglês | MEDLINE | ID: mdl-30558329

RESUMO

BACKGROUND: Alopecia areata (AA) is associated with Interferon- γ (IFN-γ) mediated T-lymphocyte dysfunction and increased circulating Interleukine-17 (IL-17) levels. Epigallocatechin-3-gallate (EGCG) specifically inhibits IFN-γ pathways and unlike Janus Kinase 1 and 2 (JAK1/JAK2) inhibitors (tofacitinib, ruxolitinib), EGCG is safer, more cost-effective, and is a topically active agent. Our objective is to test the mode of action of EGCG in vitro and ex vivo using HaCat, Jurkat cell lines, and peripheral blood mononuclear cells (PBMCs) of AA patients and healthy controls (HCs), respectively. METHODS: distribution of T helper cells (Th1, Th17), and cytotoxic cells (CD8) in PBMCs isolated from 30 AA patients and 30 HCs was investigated by flowcytomterty. In vitro treatment of HaCat and Jurkat cells with 40 µm EGCG for 48 h was performed to measure the level of phosphorylation of signal transducer and activator of transcription protein STAT1, and replicated in ex vivo model using PBMCs of AA patients. RESULTS: Interestingly, 40 µm EGCG is capable of completely inhibiting phosphorylation of STAT1 after 48 h in HaCat and Jurkat cells and ex vivo in PBMCs of AA patients. Based on QPCR data, the action of EGCG on p-STAT1 seems to be mediated via downregulation of the expression of JAK2 but not JAK1 leading to the inhibition of human leukocyte antigens (HLA-DR and HLA-B) expression probably via IRF-1. On the other hand, AA patients have significantly increased levels of Th1, Th17, and CD8 cells and the production of IFN-γ and IL-17 by PBMCs in AA patients was significantly higher compared to HC; p = 0.008 and p = 0.006, respectively. Total numbers of CD8+ cells were not significantly different between treated and untreated samples. However, CD8+ cells with positive Natural killer group 2 member D (NKG2D) transmembrane receptor (CD8+ NKG2D+ subset) was significantly reduced when PBMCs were treated with 20 µm EGCG for 48 h. CONCLUSION: These results suggest that EGCG has a synergistic action that inhibits expression of HLA-DR and HLA-B molecules via the IFN-γ pathway to maintain immune privilege in HF; also it reduces CD8+ NKG2D+ subset.


Assuntos
Alopecia em Áreas/tratamento farmacológico , Linfócitos T CD8-Positivos/efeitos dos fármacos , Catequina/análogos & derivados , Antígenos HLA-B/imunologia , Antígenos HLA-DR/imunologia , Transdução de Sinais/efeitos dos fármacos , Adulto , Alopecia em Áreas/imunologia , Linfócitos T CD8-Positivos/imunologia , Linfócitos T CD8-Positivos/metabolismo , Catequina/farmacologia , Análise Custo-Benefício , Feminino , Humanos , Fator Regulador 1 de Interferon/metabolismo , Interferon gama/imunologia , Interferon gama/farmacologia , Janus Quinase 2/metabolismo , Fator de Transcrição STAT1/metabolismo
18.
J Investig Dermatol Symp Proc ; 17(2): 1-5, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26551934

RESUMO

Alopecia areata is a common autoimmune skin disease resulting in the loss of hair on the scalp and elsewhere on the body that affects over 146 million people worldwide at some point in their lives. Founded in 1981, the National Alopecia Areata Foundation (NAAF) is a nonprofit organization that supports research to find a cure or acceptable treatment for alopecia areata, supports those with the disease, and educates the public about alopecia areata. NAAF conducts research summits every 2 years that are central to achieving the goals of a major strategic initiative, the Alopecia Areata Treatment Development Program, which are: to accelerate progress toward a safe, effective, affordable treatment or a cure for alopecia areata. These summits have played a key role in transforming the understanding of alopecia areata from largely inflammatory and dermatological perspectives to a focus on the genetic and immunological factors that are now recognized as driving and active determinants of the disease process.


Assuntos
Alopecia em Áreas , Doenças Autoimunes , Pesquisa Biomédica/economia , Organização do Financiamento , Alopecia em Áreas/tratamento farmacológico , Alopecia em Áreas/epidemiologia , Alopecia em Áreas/genética , Alopecia em Áreas/imunologia , Animais , Doenças Autoimunes/imunologia , Modelos Animais de Doenças , Humanos
19.
J Investig Dermatol Symp Proc ; 17(2): 6-8, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26551935

RESUMO

During its 25th anniversary year, the National Alopecia Areata Foundation undertook a project to completely re-evaluate their research program and to help focus and direct future directions of alopecia areata research to better meet the goals of people with alopecia areata (AA) and the scientists working to discover mechanisms of disease and better treatments for AA. This project was embodied in four research summits in 2008, 2009, 2010, and 2012, as part of the Foundation's main strategic initiative, the Alopecia Areata Treatment Development Program to accelerate progress toward a viable alopecia areata treatment. The first summit was an evaluation of the progress of AA research in a global sense, with an emphasis on how to use the research programs to bring better treatments to patients. The second summit focused on immunology and how to better understand the autoimmune nature of AA. The third summit focused on developing a clinical research network that could most effectively bring new treatments to patients. The fourth summit consolidated the considerable evidence of the mechanisms of AA, and how these mechanisms could be targeted by modern therapies, many of which were being used effectively in other autoimmune diseases. These four summits laid the foundation for the fifth summit in the series: From Targets to Treatments: Bridging Autoimmune Research to Advance Understanding of Alopecia Areata.


Assuntos
Alopecia em Áreas , Pesquisa Biomédica , Congressos como Assunto , Alopecia em Áreas/tratamento farmacológico , Alopecia em Áreas/epidemiologia , Alopecia em Áreas/genética , Alopecia em Áreas/imunologia , Animais , Pesquisa Biomédica/organização & administração , Modelos Animais de Doenças , Fundações , Humanos
20.
J Investig Dermatol Symp Proc ; 17(2): 67-9, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26551953

RESUMO

Recent advances in our understanding of the autoimmune basis of alopecia areata provide an opportunity to create novel effective pharmaceutical interventions. The current lack of approved therapies for alopecia areata presents a high unmet medical need, as well as a potentially attractive market opportunity. From an industry perspective, achieving clinical proof of concept (PoC) gates investments into larger approval studies. Recent investigator-initiated experience suggests that it may be possible to demonstrate rigorous PoC for new therapies in an attractive time frame with relatively fewer patients than were believed necessary in the past. However, the lack of prior regulatory approval precedent for pharmaceuticals to treat alopecia areata poses significant development challenges, and early interaction with the FDA and other stakeholders will be critically important in evaluating the path to approval and reimbursement for new treatments for this indication. This paper presents a brief industry perspective on the potential development of new alopecia areata therapeutics.


Assuntos
Alopecia em Áreas/tratamento farmacológico , Indústria Farmacêutica , Cobertura do Seguro , Seguro Saúde , Aprovação de Drogas , Descoberta de Drogas , Humanos , Estados Unidos
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