Moreno Menghini, Jasmina Cehajic-Kapetanovic, Robert E MacLaren
{"title":"Monitoring progression of retinitis pigmentosa: current recommendations and recent advances.","authors":"Moreno Menghini, Jasmina Cehajic-Kapetanovic, Robert E MacLaren","doi":"10.1080/21678707.2020.1735352","DOIUrl":"10.1080/21678707.2020.1735352","url":null,"abstract":"ABSTRACT Introduction: Retinitis pigmentosa (RP) is the most common form of inherited retinal degenerations with an estimated prevalence of 1 in 4,000 and more than 1 million individuals affected worldwide. With the introduction of the first retinal gene therapy in 2017, the importance of understanding the mechanisms of retinal degeneration and its natural progression has shifted from being of academic interest to being of pivotal for the development of new therapies. Areas covered: This review covers standard and innovative diagnostic techniques and complementary examinations needed for the evaluation and treatment of RP. It includes chapters on the assessment of visual function, retinal morphology, and genotyping. Expert opinion: Monitoring the progression of RP can best be achieved by combining assessments of both visual function and morphology. Visual acuity testing using ETDRS charts should be complemented by low-luminance visual acuity and color vision tests. Assessment of the visual field can also be useful in less advanced cases. In those with central RP involvement measuring retinal sensitivity using microperimetry is recommended. Retinal morphology is best assessed by OCT and autofluorescence. Genetic testing is pivotal as it contributes to the pathophysiological understanding and can guide clinical management as well as identify individuals that could benefit from retinal gene therapy.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"8 2-3","pages":"67-78"},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2020.1735352","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9147880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Whitney S Thompson, Gourish Mondal, Caitlin J Vanlith, Robert A Kaiser, Joseph B Lillegard
{"title":"The future of gene-targeted therapy for hereditary tyrosinemia type 1 as a lead indication among the inborn errors of metabolism.","authors":"Whitney S Thompson, Gourish Mondal, Caitlin J Vanlith, Robert A Kaiser, Joseph B Lillegard","doi":"10.1080/21678707.2020.1791082","DOIUrl":"https://doi.org/10.1080/21678707.2020.1791082","url":null,"abstract":"<p><strong>Introduction: </strong>Inborn errors of metabolism (IEMs) often result from single-gene mutations and collectively cause liver dysfunction in neonates leading to chronic liver and systemic disease. Current treatments for many IEMs are limited to maintenance therapies that may still require orthotropic liver transplantation. Gene therapies offer a potentially superior approach by correcting or replacing defective genes with functional isoforms; however, they face unique challenges from complexities presented by individual diseases and their diverse etiology, presentation, and pathophysiology. Furthermore, immune responses, off-target gene disruption, and tumorigenesis are major concerns that need to be addressed before clinical application of gene therapy.</p><p><strong>Areas covered: </strong>The current treatments for IEMs are reviewed as well as the advances in, and barriers to, gene therapy for IEMs. Attention is then given to ex vivo and in vivo gene therapy approaches for hereditary tyrosinemia type 1 (HT1). Of all IEMs, HT1 is particularly amenable to gene therapy because of a selective growth advantage conferred to corrected cells, thereby lowering the initial transduction threshold for phenotypic relevance.</p><p><strong>Expert opinion: </strong>It is proposed that not only is HT1 a safe indication for gene therapy, its unique characteristics position it to be an ideal IEM to develop for clinical investigation.</p>","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"8 7","pages":"245-256"},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2020.1791082","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38736749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Ruscitti, A. Conforti, V. Pavlych, R. Giacomelli
{"title":"Inhibiting inflammatory cytokines in adult onset Still’s disease. Current trends and new therapeutic perspectives","authors":"P. Ruscitti, A. Conforti, V. Pavlych, R. Giacomelli","doi":"10.1080/21678707.2019.1701431","DOIUrl":"https://doi.org/10.1080/21678707.2019.1701431","url":null,"abstract":"ABSTRACT Introduction: Multiple lines of evidence suggest the clinical usefulness of inhibiting inflammatory cytokines in patients affected by adult onset Still’s disease (AOSD), a rare inflammatory disease. The lack of response to the first therapeutic strategy with glucocorticoids and synthetic disease-modifying anti-rheumatic drugs (DMARDs) identifies ‘refractory patients’, to be subsequently treated with biologic DMARDs. Areas covered: In this article, evidence has been reviewed about the clinical usefulness of biologic DMARDs, targeting inflammatory cytokines, in AOSD, analyzing current trends and suggesting future therapeutic perspectives. Expert opinion: Therapeutic management of AOSD is directed at targeting inflammatory signs and symptoms, preventing life-threating complications, and minimizing the adverse effects of immunosuppressive therapies. In this context, over the last decade, the clinical usefulness of inhibiting inflammatory cytokines has shown in AOSD with multiple benefits, since a large percentage of patients attain a clinical response. The inhibition of inflammatory cytokines could also be helpful in managing life-threating complications of AOSD. Going forward, this field of research is rapidly growing, and in the next future, the results about ongoing randomized controlled trials and the development of clinical tools readily transferable in clinical practice, would improve the management of AOSD providing more targeted treatment and improving the outcomes of these patients.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"547 - 554"},"PeriodicalIF":0.8,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1701431","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47461550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Alonso-Vega, Irene Losada-Galván, M. Pinazo, Javier Sancho Mas, J. G. Brustenga, J. Alonso-Padilla
{"title":"The senseless orphanage of Chagas disease","authors":"C. Alonso-Vega, Irene Losada-Galván, M. Pinazo, Javier Sancho Mas, J. G. Brustenga, J. Alonso-Padilla","doi":"10.1080/21678707.2019.1701432","DOIUrl":"https://doi.org/10.1080/21678707.2019.1701432","url":null,"abstract":"ABSTRACT Introduction: Chagas disease is caused by the parasite Trypanosoma cruzi. Endemic in 21 American countries, there are ~7 million people infected, of which 14,000 die every year. Despite this burden, Chagas remains an orphan disease as it mainly affects poor communities with low economic and political power. Areas covered: There are two drugs available to treat the infection, but both have safety and efficacy issues. Investment in new treatments and other control measures has been historically neglected. This trend is changing and there are novel perspectives to put an end to this senseless orphanage. Research and development agenda of new therapies, diagnostic tools and biomarkers have moved forward during the last decade; and patients associations have been active in promoting awareness of the disease all along. Besides, the WHO recently declared April 14th as the ‘World Chagas disease day’, which will increase the visibility of the disease and attract attention internationally. Expert opinion: Efforts must focus on the prevention of new infections, but also in the management of the millions already chronically infected. This will require an integral approach where increasing the number of trained health workers and generalizing access to diagnosis and treatment will be fundamental.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"535 - 545"},"PeriodicalIF":0.8,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1701432","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47991539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An update on the progress of preclinical models for guiding therapeutic management of neuronal ceroid lipofuscinosis","authors":"Hemanth R. Nelvagal, J. Cooper","doi":"10.1080/21678707.2019.1703672","DOIUrl":"https://doi.org/10.1080/21678707.2019.1703672","url":null,"abstract":"ABSTRACT Introduction: The neuronal ceroid lipofuscinoses (NCLs) are a group of pediatric inherited neurodegenerative disorders affecting children and young adults. All forms of NCL are fatal and with no curative therapies available there is a pressing need to model their pathology in biological model systems to enable the systematic and rigorous testing of preclinical therapies. Areas covered: This article discusses and provides an update on the recent advances in modelling NCL disease pathology in various different model systems and their relevance to testing preclinical therapies so as to ensure optimal translation into human patients. The research articles discussed here were curated from PubMed (Last accessed-12.4.19) and Google Scholar (Last access-12.4.19) databases. Expert opinion: Both in vitro and in vivo biological model systems have been established for various forms of NCL. These have informed us about pathophysiology, revealed novel therapeutic targets, and provided landmarks of disease progression against which to test potential therapies. Studying NCL pathology across different species has been very informative regarding where therapies need to be delivered with an increasing focus on disease outside the brain. Testing such therapies in animal models of increasing complexity has allowed the translation of more efficacious therapies for clinical trials.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"555 - 568"},"PeriodicalIF":0.8,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1703672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48597249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Sultana, N. Azzopardi-Muscat, B. Coleiro, L. Grech, M. Muscat, D. Santoro, G. Trifirò
{"title":"Pharmacological therapy in a rare disease: challenges in the long-term management of granulomatosis with polyangiitis","authors":"J. Sultana, N. Azzopardi-Muscat, B. Coleiro, L. Grech, M. Muscat, D. Santoro, G. Trifirò","doi":"10.1080/21678707.2019.1701433","DOIUrl":"https://doi.org/10.1080/21678707.2019.1701433","url":null,"abstract":"Department of Biomedical and Dental Sciences and Morpho-functional Imaging, University of Messina, Messina, Italy; Directorate for Health Information and Research, Guardamangia, Malta; Rheumatology Unit, Mater Dei Hospital, Msida, Malta; Pharmacy Department, Faculty of Medicine and Surgery, University of Malta, Msida, Malta; National Alliance for Rare Disease Support, Malta; Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"521 - 523"},"PeriodicalIF":0.8,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1701433","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43647816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. García-Martín, S. Manrique-Rodríguez, C. Martínez Fernández-Llamazares, Marian Goicoechea-Diezhondino, Olalla Álvarez-Blanco, M. García-Morin, M. Sanjurjo-Sáez
{"title":"Variability in management and outcomes of therapy with eculizumab in atypical hemolytic uremic syndrome","authors":"E. García-Martín, S. Manrique-Rodríguez, C. Martínez Fernández-Llamazares, Marian Goicoechea-Diezhondino, Olalla Álvarez-Blanco, M. García-Morin, M. Sanjurjo-Sáez","doi":"10.1080/21678707.2019.1703108","DOIUrl":"https://doi.org/10.1080/21678707.2019.1703108","url":null,"abstract":"ABSTRACT Objectives: Atypical hemolytic uremic syndrome (aHUS) is a thrombotic microangiopathy caused by complement dysregulation. The aim of this study was to establish the efficacy and safety of eculizumab in patients with aHUS in clinical practice and to describe different individualization strategies. Methods: Authors performed an observational, longitudinal, and ambispective study at a tertiary care center. Clinical histories of patients in treatment with eculizumab were reviewed. Effectiveness and safety were assessed with the evolution of analytical parameters, symptoms and concomitant therapies required. Results: Authors included five patients (two children). The patients were followed up from diagnosis and first administration of eculizumab. Four patients discontinued eculizumab: one because he had anti-factor H autoantibodies that could be managed with immunosuppressive therapy, another because of non-response, and the other two because of clinical stabilization, resolution of TMA, and no findings of high-risk mutations in complement factors. Therapy was tapered in the remaining patients in aHUS remission. No adverse events were identified during or after treatment. Conclusion: Eculizumab is an effective and safe treatment for patients diagnosed with primary or secondary aHUS. Personalized treatment, tapering or discontinuation should be taken on an individual basis by a multidisciplinary team in order to increase the cost-effectiveness of this therapy.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"525 - 533"},"PeriodicalIF":0.8,"publicationDate":"2019-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1703108","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45587277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Vasconcelos, M. Vasconcelos, M. C. Nunes, A. Teixeira
{"title":"Sydenham’s chorea: an update on pathophysiology, clinical features and management","authors":"L. Vasconcelos, M. Vasconcelos, M. C. Nunes, A. Teixeira","doi":"10.1080/21678707.2019.1684259","DOIUrl":"https://doi.org/10.1080/21678707.2019.1684259","url":null,"abstract":"ABSTRACT Introduction: Sydenham’s chorea is an autoimmune hyperkinetic movement disorder that emerges after a group A beta-hemolytic streptococcal (GABHS) pharyngitis. It is the neurological manifestation of acute rheumatic fever. Low quality studies are the current reference for the symptomatic and/or immunomodulatory treatment of Sydenham’s chorea. Areas covered: This review contemplates the clinical features and pathophysiological aspects of Sydenham’s chorea focusing on their implications for therapeutics. It also provides an updated perspective on treatment based on antipsychotics, corticosteroids and other immunomodulatory strategies. Expert opinion: Therapeutic options for Sydenham’s chorea are still largely empirical. Based on the available evidence on the natural history of Sydenham’s chorea and other immune-mediated movement disorders, an early anti-inflammatory or immune-based approach could prevent and/or attenuate chorea, cognitive and behavioral dysfunction. A treatment algorithm for Sydenham’s chorea is proposed.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"501 - 511"},"PeriodicalIF":0.8,"publicationDate":"2019-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1684259","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45107233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Duodenal adenocarcinoma: neoadjuvant and adjuvant therapy strategies","authors":"A. Dave, Jason T. Wiseman, J. Cloyd","doi":"10.1080/21678707.2019.1684257","DOIUrl":"https://doi.org/10.1080/21678707.2019.1684257","url":null,"abstract":"ABSTRACT Introduction: Duodenal adenocarcinoma (DA) is a relatively rare gastrointestinal malignancy associated with poor outcomes. The mainstay of treatment is surgical resection with regional lymphadenectomy but recurrence rates remain high. Due to the relatively low incidence of DA, the lack of randomized controlled trials, and its inclusion with heterogeneous groups of periampullary and other small bowel cancers, strong evidence for the use of neoadjuvant or adjuvant treatment approaches is lacking. Areas covered: The purpose of this article is to review the existing literature on neoadjuvant and adjuvant therapy options along with surgical options for patients with DA. Expert opinion: The primary management of localized DA is surgical resection with negative margins and regional lymphadenectomy. Adjuvant therapy should be recommended for all patients with high-risk pathologic features such as positive lymph nodes or microscopically positive margins. The use of neoadjuvant therapy should be reserved for those patients with locally advanced disease who require downstaging to facilitate resectability. Nevertheless, given the relative rarity of DA, the available literature to guide optimal multimodality treatment decisions is minimal and additional research is needed. In the meantime, patients with DA should be treated at experienced tertiary centers by multidisciplinary oncology teams.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"463 - 472"},"PeriodicalIF":0.8,"publicationDate":"2019-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1684257","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45998148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"How many zebras are there, and where are they hiding in medical literature? A literature review of publications on rare diseases","authors":"J. Walewski, Daniel L. Donovan, Mukund Nori","doi":"10.1080/21678707.2019.1684260","DOIUrl":"https://doi.org/10.1080/21678707.2019.1684260","url":null,"abstract":"ABSTRACT Background: Reliable and accurate medical literature is essential for patients with rare diseases (affecting ~400 million people globally), their advocates, and caregivers (PACs), and health-care professionals (HCPs). Methods: We quantified the number of English-language publications on rare diseases in PubMed from 2009 to 2018. To test our search strategy, we evaluated inclusion of articles on 20 randomly selected rare diseases. We further examined 100 randomly selected articles from 2009 to 2013 and from 2014 to 2018 for journal type, article access, and PAC involvement. Results: Of the 10,882,681 articles published, 14,202 (0.13%) mentioned the MeSH term ‘rare disease’ in the title or abstract. Nineteen of 20 randomly selected diseases were included in our search results; an independent search for the ‘missing’ disease yielded no articles. Despite a numerical increase over time, there was little change in the proportion of rare disease articles. Most articles were in specialty journals, and ~2/3 were behind paywalls. The majority of rare disease manuscripts were case reports; almost no articles included PACs as authors. Conclusions: The number of high-quality medical publications on rare diseases is not commensurate with their overall prevalence and there are access barriers, highlighting an unmet need in medical literature that would benefit all stakeholders.","PeriodicalId":12118,"journal":{"name":"Expert Opinion on Orphan Drugs","volume":"7 1","pages":"513 - 519"},"PeriodicalIF":0.8,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/21678707.2019.1684260","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42685189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}