Conducting Drug Treatment Trials in Children: Opportunities and Challenges.

Children were often referred to as "therapeutic orphans" in the past due to different reasons such as ethical, regulatory, economic, scientific, etc., ones. They were exposed to avoidable risks while missing out on therapeutic advances. Pediatric patients have suffered from a lack of scientific and regulatory standards (e.g., proper drug testing, authorization of medicines for their use, etc.), although the pharmaceutical legislative framework, which ensures the high standards of safety, quality, and efficacy of medicinal products for use in adults, was developed primarily in response to past "drug disasters," mainly involving children. The adoption of pediatric regulatory initiatives first in the USA and then in Europe and other countries and regions has significantly changed the worldwide frameworks and permanently changed pediatric drug research and development. This article tries to give various perspectives with historical context, a review of the different challenges and opportunities as well as important stakeholders in pediatric drug development. The pediatric trial networks are probably the most important stakeholder that enables efficient patient recruitment, access to better resource utilization, and global collaboration of different stakeholders necessary for performing quality and well-designed clinical trials.

Five-Year Sales for Newly Marketed Prescription Drugs With and Without Initial Orphan Drug Act Designation.

This study evaluates sales revenue earned in the first 5 years for newly marketed brand-name drugs with and without an initial orphan drug designation.

Pharmaceutical policy and innovation for rare diseases: A narrative review.

This article aims to synthesize the existing literature on the implementation of public policies to incentivize the development of treatments for rare diseases, (diseases with very low prevalence and therefore with low commercial interest) otherwise known as orphan drugs. The implementation of these incentives in the United States (US), Japan, and in the European Union (EU) seems to be related to a substantial increase in treatments for these diseases, and has influenced the way the pharmaceutical research & development (R&D) system operates beyond this policy area. Despite the success of the Orphan Drug model, the academic literature also highlights the negative implications that these public policies have on affordability and access to orphan drugs, as well as on the prioritization of certain disease rare areas over others. The synthesis focuses mostly on the United States' Orphan Drug Act (ODA) as a model for subsequent policies in other regions and countries. It starts with a historical overview of the creation of the term "rare diseases", continues with a summary of the evidence available on the US ODA's positive and negative impacts, and provides a summary of the different proposals to reform these incentives in light of the negative outcomes described. Finally, it describes some key aspects of the Japanese and European policies, as well as some of the challenges captured in the literature related to their impact in Low- and Middle-Income Countries (LMICs).

Comparison of US and EU Prices for Orphan Drugs in the Perspective of the Considered US Orphan Drugs Act Modifications and Discussed Price-Regulation Mechanisms Adjustments in US and European Union.

The 2019 worldwide sales of Orphan Drugs were estimated at $136 billion USD, which constituted 16% of the global pharmaceutical prescription market and is expected to grow by 12% in the next 5 years. A better understanding of Orphan Drug pricing may contribute to on-going discussions on Orphan Drug Act (ODA) corrections in US or modifications of price setting mechanisms in EU. The objective of the study was comparison and analysis of the prices of Orphan Drugs in US and EU. All drugs with Orphan Drug status were compared in the US and EU. For the US prices, the US Department of Veterans Affairs (VA) was sourced. The EU List Prices came from six EU countries: Denmark, France, Germany, Greece, Poland, Spain. We found US prices to be higher than the six selected EU countries. The average Price Ratio was 1.64. The prices across EU countries were more homogeneous, while the number of the reimbursed and therefore available to patient medicines varied and was correlated with GDP per capita r = 0.87. Considered implementation of the External Reference Price system in US may generate significant savings in the US but may result in upward pressure on pricing of Orphan Drugs in EU. Centralization of the Orphan Drugs pricing negotiations in EU may prevent such development and offer a win-win opportunity for all involved parties.

Medicamentos órfãos em Portugal no contexto internacional (séculos XX-XXI) / Orphan drugs in Portugal in the international context (XX-XXI centuries)

A consciência científica, clínica e pública da existência das doenças raras tem aumentado nos últimos anos. Os medicamentos denominados de “medicamentos órfãos” são aqueles que são apropriados para o tratamento de doenças raras. As doenças raras, comparadas com outras doenças, apresentam uma baixa incidência demográfica. Por esta razão, e em virtude das condições vigentes de comercialização, as indústrias farmacêuticas não apostam fortemente nos medicamentos órfãos. Os produtores não teriam oportunidade de recuperar o capital investido na investigação e desenvolvimento do medicamento. Neste estudo os autores fazem um historial dos medicamentos órfãos em Portugal tendo como fontes a legislação e regulamentação portuguesas no quadro da legislação e diretivas europeias, o papel das indústrias farmacêuticas em Portugal, a regulamentação e fiscalização realizada pelo INFARMED, IP, bem como o acesso dos doentes aos medicamentos órfãos e o papel fulcral das associações de doentes (AU)

Removal of the EMA orphan designation upon request of the sponsor: cui prodest?

PURPOSE: Various incentives are provided by the European Medicines Agency (EMA) to facilitate the development and marketing of orphan drugs. A 10-year period of market exclusivity is reserved to an orphan medicinal product. Sometimes, the sponsor renounces the designation before the expiration of that standard period. Our aim was to focus on these premature withdrawals. METHODS: We retrieved all the molecules included in the Community Register of Orphan Medicinal Products for Human Use from 2000 to November 2020. We considered the active substance, therapeutic indication, sponsor, year of designation, year of approval of the corresponding medicinal product, and that of the withdrawal of the orphan designation, if occurred. RESULTS: Overall, 2350 orphan designations were approved from 2000 to November 2020. Of these, 141 have been marketed. Premature withdrawal of orphan designation concerned 23 drugs (20 being antineoplastic agents), corresponding to 16 medicinal products. These withdrawals occurred after almost 2 years (range <1-7 years). CONCLUSIONS: A not negligible fraction of marketed orphan medicinal products underwent premature removal of their orphan designation. No motivation is requested by the EMA for this renouncement, although the peculiarity of the orphan medicinal products would need a greater transparency. We can only speculate about possible compensations in support of this decision, for instance in terms of commercial agreements between pharmaceutical companies, giving way to alternative products, as a couple of examples suggest. An open debate on this topic among members of academia, regulatory bodies, price and reimbursements committees, and pharmaceutical industry representatives will be welcome.

Regulatory environment for novel therapeutic development in mitochondrial diseases.

At present, there is just one approved therapy for patients with mitochondrial diseases in Europe, another in Japan, and none in the United States. These facts reveal an important and significant unmet need for approved therapies for these debilitating and often fatal disorders. To fill this need, it is critical for clinicians and drug developers to work closely with regulatory agencies. In the United States, mitochondrial disease patients and clinicians, the United Mitochondrial Disease Foundation, and pharmaceutical industry members have engaged with the Food and Drug Administration to educate each other about these complex and heterogeneous diseases and about regulatory requirements to obtain approvals for novel therapies. Clinical development of therapies for rare diseases has been facilitated by the 1983 US Orphan Drug Act (ODA) and similar legislation in Japan and the European Union. Further legislation and regulatory guidance have expanded and refined regulatory flexibility. While regulatory and financial incentives of the ODA have augmented involvement of pharmaceutical companies, clinicians, with patient advocacy groups and industry, need to conduct natural history studies, develop clinical outcome measures, and identify potential supportive surrogate endpoints predictive of clinical benefit, which together are critical foundations for clinical trials. Thus, the regulatory environment for novel therapeutic development is conducive and offers flexibility for mitochondrial diseases. Nevertheless, flexibility does not mean lower standards, as well-controlled rigorous clinical trials of high quality are still required to establish the efficacy of potential therapies and to obtain regulatory agency approvals for their commercial use. This process is illustrated through the authors' ongoing efforts to develop therapy for thymidine kinase 2 deficiency.

Policy Recommendations to Promote Prescription Drug Competition: A Position Paper From the American College of Physicians.

The prescription drug market in the United States relies on competition to keep prices reasonable. Although many policies have been implemented to spur competition and decrease costs for patients, these policies may be outdated and should be redesigned and updated to achieve success in the current prescription drug market. In this paper, the American College of Physicians (ACP) proposes that new policies should be implemented to prevent market manipulation, help lower-cost alternatives make it to the market faster, and ensure a robust and competitive market for generic and biosimilar drugs. The ACP believes these changes will have a meaningful effect on patients without shifting costs to other areas of the health care system.

Lurbinectedin: First Approval.

The oncogenic transcription inhibitor lurbinectedin (ZEPZELCA™) is being developed by PharmaMar as a treatment for various cancers. The drug has been granted orphan drug status for the treatment of small cell lung cancer (SCLC) by regulatory authorities in multiple countries worldwide and was approved in the USA in June 2020 for the treatment of adult patients with metastatic SCLC with disease progression on or after platinum-based chemotherapy. The US FDA and international regulators, including the Australian Therapeutic Goods Administration, are collaborating on the review of lurbinectedin under the Project Orbis initiative. Clinical investigation in other solid cancers is ongoing. This article summarizes the milestones in the development of lurbinectedin leading to this first approval for the treatment of metastatic SCLC.

[Orphan drugs and drug pirates]. / Weesgeneesmiddelen en medicijnkapers.

The European Orphan Medicines Regulation, which came into effect in 2000, stimulates the development of medicines for rare diseases. The number of registered orphan medicines has increased from eight in 2000 to 169 in 2019; 38% of these are available in the Netherlands. The costs for orphan medicines in the Netherlands are increasing by 9% every year, and now amount to €272 million annually. There is, however, still no effective medication for thousands of rare diseases. The Orphan Regulation was intended for new orphan medicines, but some companies also use it for 'repurposing' of old agents, for which they also get 10 years exclusive market rights in the EU. The improper use of legislation has led to concern among patients, doctors, and medical insurance companies. The Netherlands Council for Public Health and Society and MPs in the lower house of the Netherlands parliament have proposed measures for tackling the high prices of medicines and Mr. Bruins, the former Minister of Health, wanted to propose legislative change in the EU. The EU 'pharmaceutical incentive review' offers the possibility to revise the current rules.

Regulatory approval and public drug plan listing of new drugs for rare disorders in Canada and New Zealand.

A previous assessment of the alignment of health technology assessments and price negotiations for new drugs for rare disorders in Canada completed between 2014 and 2018 demonstrated that it is working for governments but has yet to lead to improved access in a timely manner for all appropriate patients in all provinces. In this analysis, drugs for rare and ultra-rare disorders with a completed price negotiation or no negotiation between 2014 and 2018 in Canada, and their reimbursement recommendations and listings in Canadian public drug programs are compared with their regulatory approval in New Zealand and listing in the New Zealand National Formulary. The results show that pharmaceutical manufacturers generally seek regulatory approval for rare disorder drugs in Canada before New Zealand, and fewer rare disorder medicines receive regulatory approval in New Zealand. One reason for this difference might be New Zealand's smaller population. However, another reason is likely the restrictive drug formulary in New Zealand. Drugs not given coverage in New Zealand are frequently made unavailable by the manufacturer. Planned changes to Canada's pricing regulations and guidelines will significantly diminish the country's attractiveness as a place in which pharmaceutical companies want to do business, which has the potential to negatively impact the health of all Canadians irrespective of whether they have private or public drug coverage.

Assessment of significant benefit for orphan medicinal products by European regulators may support subsequent relative effectiveness assessments by health technology assessment organizations.

To maintain orphan drug status at the time of market authorization, orphan medicinal products (OMPs) need to be assessed for all criteria, including significant benefit, by the Committee for Orphan Medicinal Products (COMP) of the European Medicines Agency (EMA). Subsequently, health technology assessment (HTA) organizations evaluate the same OMPs in their relative effectiveness assessments (REAs). This review investigates the similarities and differences between the two frameworks for six HTA organizations, including the European Network for HTA. We discuss differences between both assessment frameworks within five domains (clinical evidence used, patient population, intervention, comparators, and outcome measures) for all drugs. Five illustrative cases studies were selected for a qualitative review.

FDA orphan drug designations for lysosomal storage disorders - a cross-sectional analysis.

PURPOSE: To provide a quantitative clinical-regulatory insight into the status of FDA orphan drug designations for compounds intended to treat lysosomal storage disorders (LSDs). METHODS: Assessment of the drug pipeline through analysis of the FDA database for orphan drug designations with descriptive and comparative statistics. RESULTS: Between 1983 and 2019, 124 orphan drug designations were granted by the FDA for compounds intended to treat 28 lysosomal storage diseases. Orphan drug designations focused on Gaucher disease (N = 16), Pompe disease (N = 16), Fabry disease (N = 10), MPS II (N = 10), MPS I (N = 9), and MPS IIIA (N = 9), and included enzyme replacement therapies, gene therapies, and small molecules, and others. Twenty-three orphan drugs were approved for the treatment of 11 LSDs. Gaucher disease (N = 6), cystinosis (N = 5), Pompe disease (N = 3), and Fabry disease (N = 2) had multiple approvals, CLN2, LAL-D, MPS I, II, IVA, VI, and VII one approval each. This is an increase of nine more approved drugs and four more treatable LSDs (CLN2, MPS VII, LAL-D, and MPS IVA) since 2013. Mean time between orphan drug designation and FDA approval was 89.7 SD 55.00 (range 8-203, N = 23) months. CONCLUSIONS: The drug development pipeline for LSDs is growing and evolving, with increased focus on diverse small-molecule targets and gene therapy. CLN2 was the first and only LSD with an approved therapy directly targeted to the brain. Newly approved products included "me-too"-enzymes and innovative compounds such as the first pharmacological chaperone for the treatment of Fabry disease.

The implementation of health technology assessment principles in public decisions concerning orphan drugs.

PURPOSE: Over the last few years, the share of public spending for orphan drugs (ODs) has increased in several western countries, raising concern on the exemptions granted to this sector with respect to the implementation of health technology assessment (HTA) principles. The aim of this paper is to shed light on both the HTA criteria adopted and the international agreements implemented in the OD regulation, given the new challenges imposed on western countries by a growing number of therapies for rare diseases. METHODS: We carried out a literature review to analyse the development of the international debate on the adaptability of HTA criteria for the OD assessment and regulation. The time span lies between January 1990 and May 2018, and the policies considered relate to both market authorization and reimbursement decisions within western countries. We focus specifically on HTA criteria in some of the dimensions included in the Core Model of the European net for HTA (EUnetHTA). RESULTS: OD high prices, the absence of clarity on the possible high revenues realized by the distribution of a new OD outside the national borders, the risk that - once marketed - a new OD can be used to treat common diseases, are all issues that raise concern on OD regulation and have to be carefully monitored by policymakers in the next future. CONCLUSIONS: Across western countries, the preferential track granted to ODs in the implementation of HTA principles is not homogeneous, but fragmented and differentiated. The need for common rules at an international level is underlined, with a view to assessing the sustainability of a sector which, due to this regulatory void, can lend itself to producers' strategic and opportunistic behaviours.

Use of real-world evidence in regulatory decisions for rare diseases in the United States-Current status and future directions.

Following the release of the framework for the Real-World Evidence (RWE) Program, the US Food and Drug Administration (FDA) is actively evaluating and exploring ways to optimize the utility of real-world data (RWD) and RWE to support regulatory decision making. For rare conditions, conducting traditional randomized clinical trials may not always be feasible, and RWD and RWE have played and will continue to play an important role. We use three case examples-cerliponase alfa, asfotase alfa, and uridine triacetate-to illustrate how RWD from disease registries, medical records with chart review, and literature, respectively, have been used to generate RWE to support regulatory decisions for selected rare diseases. These examples highlight the need for improving data reliability and quality in existing data to expand use of RWD and RWE beyond "hard endpoints" and standardizing data collection for outcome measures in patient registries to expand its utility. We also discuss a recent FDA guidance for using RWE in supporting rare disease drug development, including its recommendations about using natural history studies as external control groups for single-arm interventional trials. The external control group needs to be comparable with the treated group. Selection bias and confounding are major concerns because of lack of randomization and unrecognized baseline differences. Use of valid epidemiological approaches can reduce these biases. Lastly, we discuss future directions to expand the use of RWD and RWE to support orphan drug approvals, including the need for including patient experience data as an important source of RWD.