The need for performing clinical trials to develop well-studied and appropriate medicines for inherited neurometabolic disease patients faces ethical concerns mainly raising from four aspects: the diseases are rare; include young and very young patients; the neurological impairment may compromise the capability to provide ‘consent’; and the genetic nature of the disease leads to further ethical implications. This work is intended to identify the ethical provisions applicable to clinical research involving these patients and to evaluate if these cover the ethical issues. Three searches have been performed on the European regulatory/legal framework, the literature and European Union-funded projects. The European legal framework offers a number of ethical provisions ruling the clinical research on paediatric, rare, inherited diseases with neurological symptoms. In the literature, relevant publications deal with informed consent, newborn genetic screenings, gene therapy and rights/interests of research participants. Additional information raised from European projects on sharing patients’ data from different countries, the need to fill the gap of the regulatory framework and to improve information to stakeholders and patients/families.
Conclusion: Several recommendations and guidelines on ethical aspects are applicable to the inherited neurometabolic disease research in Europe, even though they suffer from the lack of a common ethical approach.
What is Known:
• When planning and conducting clinical trials, sponsors and researchers know that clinical trials are to be performed according to well-established ethical rules, and patients should be aware about their rights.
• In the cases of paediatric patients, vulnerable patients unable to provide consent, genetic diseases’ further rules apply.
What is New:
• This work discusses which ethical rules apply to ensure protection of patient’s rights if all the above-mentioned features coexist.
• This work shows available data and information on how these rules have been applied.
Inherited NeuroMetabolic Diseases (iNMDs) represent a particularly important group of rare diseases being constituted by genetic metabolic disorders that may impact on the brain from birth (sometimes already in utero) and during the whole developmental period causing mental retardation and/or different neurological signs and symptoms, may be progressive and may ultimately end with irreversible consequences and even in early death .
Today, as a result of medical research, major progress has been made. The scenario of the ‘personalised medicine’, based on the premise ‘the right treatment for the right patient at the right time’, is proposing the use of the latest advancements in biological knowledge and technology, such as the completion of the human genome mapping, to improve understanding of inter-individual variability, in order to include them in the medicine developmental process. The research based on ‘omics’ technologies, including pharmacogenetics/pharmacogenomics (PGt/PGx), is producing a very high amount of data. In fact, these approaches have been demonstrated to be useful both in pharmacological treatment and in diagnosis.
However, the number of curative interventions remains low and this low number of approved drugs is strictly connected to the difficulties characterising the research in this field that can be summarised as the following.
First of all, when dealing with children, clinical research raises many scientific and ethical concerns, and special provisions should apply . Due to developmental and cognitive limitations and legal incapacity, a child is legally unable to provide informed consent to participate in research that should be done by a legal representative . On the other hand, children are entitled to receive appropriate information about their health and their participation in clinical studies that imply that their views can be sought and taken into account. Challenges and obstacles in accessing the views of children and young people have been identified by the Paediatric Committee (PDCO) and include access, language/ability to express oneself, ethnic and cultural differences, chronological age and maturity, ill-informed or preconceived notions about a child’s level of understanding and maturity . The call for more medical research involving children, as enlightened by the European Directive 2001/20/EC  and the Paediatric Regulation [32, 33], has also raised the question whether the law strikes an appropriate balance between the need for clinical trials and the interests and rights of the child.
Secondly, when paediatric patients are affected by rare diseases, difficulties double  as children should be considered ‘twice orphan’, and randomised controlled trials, considered as the standard in research design, are even more unfeasible due to the smaller number of patients. It becomes ethically problematic to propose a control arm (in which the investigational product/approach is not provided to a segment of the population) for a study aimed to establish the efficacy of a new product/approach.
The difficulties to propose a control arm are also true for prenatal and neonatal screenings, which represent a fundamental step in the diagnosis of genetic diseases. Screening programs for genetic diseases have multiplied in the last 50 years . Research in this field is often observational with either historical control data or control through comparisons with similar populations without screening .
More in general, clinical research on genetic diseases raises additional scientific and ethical concerns, including specific ethical procedures for genetic research, collection, storage and access to genetic materials, aims of the use of genetic information, time of archiving genetic material in biobanks, informed consent, special issues dealing with confidentiality and paediatrics.
Genetic testing guides the prevention, clinical management and drug treatment based on genetic susceptibilities . Carriers/patients must consider disclosure of information to others and weigh the right to privacy against common interests [17, 39]. In addition, knowledge of one’s carrier status for recessive genetic diseases is useful primarily in making reproductive decisions. Such decisions are within the private domain of the young adults who are dating, mating and forming new families. The privacy of these decisions may be compromised when parents know the carrier status of their children.
Another aspect to be considered is the use of advanced therapy medicinal products (ATMPs), including gene therapy, and the so-called personalised medicine. Today, for this type of diseases, this represents the most innovative research. For example, when a product is autologous (meaning that it ‘originates from the same patient’), who is the owner of the product? The company or the patient?
Finally, the neurological impairment characterising patients affected by iNMDs can lead to mental disability and make both paediatric and adult patients vulnerable (persons relatively or absolutely incapable of protecting their own interests and therefore not capable of giving adequately consent) unable to give their consent or assent. The current legislation  defines these patients ‘incapacitated subjects’.
In order to perform well-conducted research in this field, many regulatory/ethical and legal provisions need to be followed by researchers, not limited to good clinical practice , to considering all these aspects. For this reason, this work aims the following:
To identify the relevant provisions to perform well-conducted research from the ethical point of view in the field of iNMDs, taking into account the issues listed above
To evaluate if the existing provisions cover the ethical issues related to:
Rare diseases: clinical studies require ad hoc methodological approaches which should minimise the number of patients and ensure the adequateness of results and the statistical power at the same time
Children and patients with neurological symptoms: vulnerable patients requiring ad hoc protection
Genetic/inherited diseases: specific ethical procedures for genetic research, collection, storage and access to genetic materials, aims of the use of genetic information, time of archiving genetic material in biobanks and informed consent
All these conditions share the important ethical issue concerning the need for studying and making available drugs notwithstanding the scarce economic return coming from their development.
In order to reach the aim of this work, the following actions were undertaken:
To search for the current ethical provisions applicable in Europe to the iNMD research
The actual European regulatory/ethical and legal framework was reviewed. Other relevant international guidelines and texts were taken into account, as well. The following sources were consulted: EudraLex Volume 10—Clinical trials guidelines; International Conference on Harmonisation (ICH) guidelines; World Health Organization (WHO)—Council for International Organizations of Medical Sciences (CIOMS) guidelines; EC Public Health publications; Council of Europe treaties; World Medical Association publications; UNESCO Declarations; and European Medicines Agency (EMA).
Then, the applicability of retrieved documents in the iNMD field was analysed by considering the specific features of iNMDs, i.e.:
The rarity of conditions
The presence of paediatric patients
The neurological impairment that often compromises their capability to provide the consent or assent
The genetic nature of the disease
To review relevant data from the literature
An ad hoc bibliographic search was performed in PubMed (Fig. 1). The publications discussing ethical issues related to research involving iNMD patients and the application of the existing provisions in the field were considered compliant with the search.
The following search strategy was used: (“Brain Diseases, Metabolic, Inborn”[Mesh]) AND “Ethics, Clinical”[Mesh] OR (“Brain Diseases, Metabolic, Inborn”[Mesh]) AND “Ethics, Research”[Mesh]. Only publications in English were considered.
Even in this second step, the rarity of conditions, the inheritance and familiar implications, the presence of paediatric patients and the manifestation of neurologic symptoms which can make paediatric and adult patients unable to provide the consent were focused on.
To find relevant results and achievements from European projects
We also looked for data relevant to the aims of this work from already existing EU-funded projects on paediatric and rare disease research. The Community Research and Development Information Service (CORDIS) and Consumers, Health, Agriculture and Food Executive Agency (CHAFEA) were searched by using the following keywords: (paediatric OR rare or genetic) AND disease AND clinical AND research AND ethics. Public websites were consulted, where existing.
The current ethical provisions applicable in Europe to inherited neurometabolic diseases
The actual European regulatory/ethical and legal framework offers document ruling, in general, the clinical research including ethical provisions applicable to the iNMD research: Regulation (EU) 536/2014 ; Directive 2005/28/EC ; ICH Guideline for Good Clinical Practice ; EMA Reflection paper on ethical and GCP aspects of clinical trials of medicinal products for human use conducted outside of the EU/EEA and submitted in marketing authorization applications ; and European Commission guidelines on good clinical practice specific to advanced therapy medicinal products .
Issues related to both paediatrics and vulnerability and disability were found in almost all documents, mainly dealing with informed consent and ethics committee expertise/composition (Table 1). In contrast, no specific ethical issue on ATMPs is available.
Rare diseases are only cited in the new EU regulation  and EMA Reflection Paper , but no provision is established.
Among the other relevant international guidelines/documents and texts [9, 11, 12, 15, 16, 53], CIOMS-WHO guidelines  add specific details on the justification for enrolling ‘special populations’ like children and vulnerable patients, as well as on the informed consent and assent process. The recommendation is to seek a separate informed consent for the analysis of genetic material, if the genetic research is not a necessary part of the main clinical study. In addition, the use of results of genetic tests and familial genetic information and the precautions to prevent disclosure of the results of a subject’s genetic tests to immediate family relatives or to others are taken into account. The need for medical and psychological support for children and parents is also mentioned.
Further ethical provisions on data protection and confidentiality [10, 14, 29, 31] apply in the field of clinical research. However, no special requirements are available for issues taken into account in this work (i.e. paediatric and vulnerable patients, rare and genetic diseases). Council of Europe Committee of Ministers (CoE) recommendation on the protection of medical data  specifies rules to allow a clinical study even though personal data are not fully anonymised.
Specific documents deal with genetic tests and PGt/PGx research [13, 52]. They recommend (and do not make mandatory) that ad hoc consent is to be sought for genetic tests, thus meaning that a consent separate from the main study is appropriate in the case of clinical trials with genetic sub-studies. The consent should include information on subsequent processing, use and storage and indicate that the subject has the right to decide whether or not to be informed of the results .
Further guidance covering ethical aspects in the paediatric field can be found [21, 24, 32, 33]. In particular, ICH topic E11  adds special restrictions when planning a paediatric clinical trial in ‘more vulnerable populations’ and handicapped or institutionalised paediatric populations. Rare diseases are mentioned in the EC Recommendations , as well as genetic issues, for which disclosure in clinical trials of genetic findings is recognised as a possible risk, thus requiring expert counselling in an adequate setting. The need for justifying alternative designs and/or analyses and agreeing these applications with competent authorities is mentioned. Table 1 summarises the provisions applicable in the iNMD field.
The application of ethical provisions retrieved in the literature
We searched the literature in order to find the possible existing information on the application of ethical rules in iNMD clinical research and the current debate on the ethical issues (Table 2).
The literature search produced 50 records. The abstract/full text of two of them were not available. Eleven resulted compliant, i.e. dealing with ethical issues of research involving iNMD patients [3, 7, 18, 34, 35, 38, 43, 44, 47, 49, 50]. As shown in Table 3, these publications are set in several fields.
Five out of 11 publications were laid down in the context of trials/experimental uses: three of them were focused on gene therapy [7, 18, 34], one showed results from the experimental treatment of an extemporaneous formulation administered to a paediatric patient  and one discussed about in utero stem cell transplantation .
Four publications were laid down in the context of newborn genetic screening programs [3, 7, 47, 50].
Finally, one publication was about biobanks , and another one was related to genetic research .
More in detail, different topics were examined as follows.
Five publications dealt with the use of stored samples for research purposes [3, 7, 38, 43, 47]. Specifically, Glantz and colleagues considered the issue on the ownership of the stored samples as well as rights of (paediatric) participants .
Eight publications dealt with informed consent issues [7, 18, 34, 35, 38, 43, 47, 49]. Three discussed about the consent from parents/legal guardians in the case of paediatric participants [7, 47, 49]. None mentioned the assent and the involvement of minors in the informed consent/assent procedure (in the case of neonatal screening [7, 47], we did not expect to find any information on this).
In addition, three publications explicitly considered the need for participant/legal guardian consent for the secondary use of data and samples [7, 38, 47].
The right to privacy and confidentiality was mentioned in three publications [7, 38, 50].
Three publications specifically discussed the interests and rights of children as research participants [7, 38, 43].
Finally, four publications argued about appropriateness of the experimental approach to be followed in order to protect individuals [3, 7, 44, 50].
Other topics were also discussed.
Sheela and colleagues considered the need for the ethics committee’s approval . During highlighted the need for specific expertise in ethics committee assessing gene therapy trials . Ross claimed the need for trained paediatricians . Fox examined the need for disclosing conflicts of interest .
Seven publications (7/11) were about paediatric patients [3, 7, 38, 43, 47, 49, 50], most of them dealing with research in newborn screenings [3, 7, 47, 50].
Five publications faced ethical aspects related to genetic/inherited features of the diseases affecting research participants [3, 7, 47, 49, 50].
Two publications took into account the rarity of conditions [7, 50].
Only one publication discussed about the vulnerable status of an iNMD patient due to the frequently neurodegenerative nature of disease and about the potential impacts on unaffected family members .
No publication faced the balance between the development of well-studied and appropriate medicines in this field and the ethical concerns for enrolling young patients.
Results from European projects
Additional information was derived from EU-funded projects. Fifty-one projects were found in CORDIS database. As none was found in CHAFEA, we screened 84 projects retrieved with ‘rare disease’ search string. Overall, nine projects resulted compliant, i.e. dealing with ethical issues of research involving rare or paediatric patients and genetics, focusing on different topics (Table 3).
Five projects considered paediatric issues [40, 41, 46, 48, 51], four of them discussed diseases with neurological impairment [19, 40, 41, 48], three were focused on rare diseases [40, 41, 45] and two on genetic research [1, 8].
The attitude, expectations and needs related to the participation and empowerment of children in clinical trials were explored in COB , InNerMeD , LEUKOTREAT , RESPECT  and TEDDY  projects. In detail, the analysis performed within RESPECT indicated four main barriers to participation of children in clinical trials: emotional barriers, ethics and transparency of information, practical barriers and the relationship with physicians. The project also identified several needs for the participants: to be treated as a partner in the clinical trial process, to access information about the clinical trial, to increase the patients’ ability to play an active role in the decision-making process, to develop an educational programme for patient organisations in order to increase their knowledge of clinical trials and to act as a partner in the clinical trial process, to increase ethics committees’ competence and involvement in paediatric research and their networking, to fulfil the need for greater transparency and access to trial results in order to prevent unnecessary paediatric clinical trials throughout Europe and to provide patient organisations a more active role before, during and after the implementation of a clinical trial.
Informed consent procedures were dealt with five projects [40, 45, 46, 48, 51], three also including assent procedures [40, 46, 51].
Regulatory/ethical/legal aspects were part of seven projects [1, 8, 19, 40, 41, 45, 51]. In particular, LEUKOTREAT , which specifically deals with a group of iNMDs, sets out the basis of its work in the Declaration of Helsinki  and CIOMS-WHO Ethical Guidelines ; TEDDY  and InNerMeD  on the EC Recommendations , ICH Topic E11  and the other relevant guidelines. In particular, TEDDY “Ethical recommendation on pharmacogenetic/genomic research” endorsed that a common position is shared among stakeholders, considering the type of information given to patients and parents/legal representatives, especially when neonates, who cannot participate in the informed consent/assent process, are involved; procedures and expertise to be included in the ethics committee when genetic tests and studies are concerned; access to biological materials and data stored in biobanks in lack of consent or assent; time of archiving genetic material in biobanks; access to genetic results from parents/careers according to CIOMS-WHO Ethical Guidelines . These recommendations were implemented in the InNerMeD-I-Network  project.
Data protection/confidentiality issues including data sharing among different centres or countries were found in two projects [41, 45]: the increasing relevance of data sharing among international research consortia, and the need for coordination and harmonisation between different research centres, the right to benefit from research, the preservation of identity and privacy for rare disease patients are dealt within RD-CONNECT project . Importantly, the use of prospective, retrospective and broad consent, re-consent, waiver of consent, opt out method (giving consent by not declining to give consent) is discussed and templates are provided.
The European legal framework offers a number of ethical provisions ruling the clinical research in general as well as specifically applicable to the iNMDs field, i.e. rare inherited diseases with neurological symptoms often involving young and very young patients.
From a general point of view, in Europe, all clinical trials follow the same assessment and authorisation. From 2016, with the entry into force of the new Regulation (EU) 536/2014 , a unique central procedure will be in place through a unique portal by submitting a homogeneous package for all Member States. This includes specific conditions to begin clinical research involving vulnerable persons, i.e. minors (art. 32) and incapacitated subjects (art. 31). For paediatric trials, the assessment must take into account PDCO opinions on Paediatric Investigation Plans (PIPs) and must be carried out by ethics committees with paediatric expertise or seeking advice from experts in the field taking into account the risks and benefits of research and other aspects such as the study design, the use of placebo and the monitoring of safety during and after the trial. This represents an important achievement from the ethical point of view and in consideration of the protection of children’s rights . However, uncertainties still remain on how national ethics committees and the PDCO will interact and what would happen if the PDCO and the ethics committee opinions differ . Therefore, given that ethics committees and PDCO evaluate many common elements while having distinct roles and responsibilities, the applications should be harmonised and standardised.
On the basis of our results, we can derive the following considerations regarding the above-mentioned features of iNMDs.
Most of the regulatory documents do not deal with ethical aspects related to rare diseases. Unfortunately, the new clinical trial Regulation (EU) No 536/2014  only mentions the importance of clinical trials and timely availability of drugs for patients with rare and ultra-rare diseases in two recitals, but it does not establish applicable provisions. In fact, it does not make mandatory either a faster assessment of these trials or the involvement of specific expertise in the assessment phase. In line with the regulatory findings, ethical aspects related to the rarity of iNMDs are poorly dealt with in the literature, even though several EU projects are focused on rare diseases.
Specific ethical/regulatory documents are available for paediatric research. The recommendations released by the European Commission in 2008  include the highest standard to be met. They deal with the benefit and risk balance, the process of information and consent/assent according to an age-staggered approach, the ethical review of paediatric protocols, the individual data protection and insurance issues. They mention that children with chronic illness may have increased capacity to make independent judgements based on previous life experience. Currently, this document is under revision and the European Commission launched a public consultation (from 1 June 2016 to 31 August 2016) to seek the views of stakeholders in preparation for the implementation for the new Clinical Trials Regulation (EU) No 536/2014.
However, as underlined in this work and in line with previous considerations , they have a poor legislative power and are implemented only partially in the regulation recently released .
With regard to the informed consent and assent, it has been recognised that before the decision to participate or abstain from participation, children are entitled to receive oral and written information according to age and level of maturity [21, 24, 28]. However, the existing provisions on informed assent are not fully applicable to iNMDs and are not enough, as the neurological impairment often leads to a different mental maturity of patients, both adult and paediatric, and makes them ‘vulnerable persons’ unable to provide their consent. As demonstrated by the analysis performed, at a regulatory level, this concept has been implemented in different documents [9, 11, 13, 14, 21, 24, 25, 27, 28, 53] and the need for obtaining the consent from a legal representative is made mandatory from the EU Regulation .
Other ethical issues arising great interest in the scientific community, as demonstrated in the regulatory framework, the literature and EU projects, include genetic aspects, data protection, confidentiality and the handling of biological samples, including the ‘secondary’ use of stored samples for research purposes after testing is completed. The existing provisions applicable in Europe appear highly relevant as they suggest procedures to safeguard the rights of research participants [9, 13, 52]. However, also these documents have a poor legislative power and their application requires a great effort from researchers, especially in the case of multi-centre and multi-national studies in which national laws also have to be complied with. Importantly, it should be noted that these issues have not ad hoc rules in paediatrics.
The analysis performed in the literature reveals that a great part of publications dealt with informed consent issues, but none mentioned the assent and the involvement of minors in the informed consent/assent procedure.
Finally, even though the literature provides a number of recommendations/suggestions addressed to different stakeholders (researchers/clinicians, policymakers/health institutions, ethics committees, patients and their families), including the implementation of clear ethical rules [38, 50], no publication considers the application of regulatory/ethical/legal provisions in the iNMD field, either in Europe or in any country in the world.
Additional relevant information was found in EU-funded projects. Rare inherited paediatric neurological disorders are the focus of InNerMeD-I-Network  and LEUKOTREAT  projects.
Because of the paucity of current information about most of these disorders, the ‘Inherited NeuroMetabolic Disease Information Network’ project was launched with the aim of creating the first European network of information related to diagnosis and treatment of iNMDs. One of the goals of the project was to straighten research capacities in the iNMD field and to overcome the existing barriers for developing drugs for small populations. In this context, methodological and ethical recommendations have been publicly released for researchers, including companies and research centres, ethics committees, patients and families to perform well-conducted research involving iNMD patients.
Also, TEDDY  and RESPECT  FP projects released recommendations on ethical issues in paediatrics with the aims to fill the gap of the regulatory framework and to improve information to stakeholders and patients/families on issues related to paediatric research, such as the informed consent and assent process. Furthermore, the GRiP project (Global Research in Paediatrics - 261060 - FP7-HEALTH-F5-2010) provided documents on the ethical review of multi-jurisdictional trials and models for information sharing on human research among ethics committees and Institutional Review Boards in the paediatric field.
Another important issue raised is the relevance of sharing patient data from different countries from the ethical point of view [41, 45]. This is increasingly widespread in the case of rare disease and particularly challenging when these data are from children and include genetic data.
Importantly, no specific ethical issue on the use of ATMPs for iNMDs and paediatric rare diseases in general is available in the regulatory framework. This claims the need for further specific guidelines/recommendations in this field that could be particularly relevant to iNMDs.
The lack of substantial guidance from the legal and methodological point of view emerges in the regulatory framework, as demonstrated in the literature and underlined in the framework of research projects.
Overall, these EU projects underline the interest from the European Commission in the field. In the framework of the new research programme Horizon 2020, a project on the study of the changes deriving from the application of the new Regulation on clinical trial  and the proposed Regulation on privacy and data protection  might be expected.
Conclusively, this work highlights the need for a common ethical approach to the clinical research involving iNMD patients and, more in general, rare neurological diseases also affecting children. This approach should represent the basis for developing official ethical recommendations for researchers, companies, ethics Committees, patients and families to be shared with regulatory agencies and public health bodies.
- European Medicines Agency:
- Inherited NeuroMetabolic Disease:
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The research leading to these results has received funding from the European Union in the framework of the Second Health Programme under grant agreement no. 2012 12 12 (InNerMeD-I-Network project). Sole responsibility lies with the author and the Executive Agency is not responsible for any use that may be made of the information contained therein. Support from the TEDDY network (originated from the FP6 Network of Excellence LSHB-CT-2005-005216) is also gratefully acknowledged.
Viviana Giannuzzi prepared the first draft of the manuscript and performed the research; Hugo Devlieger and Viveca Lena Odlind reviewed data on the paediatric regulatory aspects; Lucia Margari reviewed data on neurological aspects; Lamis Ragab contributed reviewed data on the bioethical outcomes; Cinzia Maria Bellettato and Francesca D’Avanzo contributed in the searches on EU-funded projects; Linda Cassis and Elisenda Cortès-Saladelafont contributed to the bibliographic search; Christina Lampe, Ángels Garcia-Cazorla, Ivo Barić, Ljerka Cvitanović- Šojat, Ksenija Fumić and Christine I Dali contributed to review the specific clinical aspects of inherited neurometabolic diseases; Franco Bartoloni reviewed issues related to data protection and confidentiality; Fedele Bonifazi contributed to the set up of the methodology; and Maurizio Scarpa and Adriana Ceci provided a general and final review of the draft.
This article does not contain any studies with human participants or animals performed by any of the authors.
Conflict of interest
The authors declare that they have no conflict of interest.
Communicated by Peter de Winter
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Giannuzzi, V., Devlieger, H., Margari, L. et al. The ethical framework for performing research with rare inherited neurometabolic disease patients. Eur J Pediatr 176, 395–405 (2017). https://doi.org/10.1007/s00431-017-2852-9
- Genetic disease
- Clinical research