ObjectiveTo present the ethical issues, moral arguments, and reasons found in the ethical literature on organoid models.DesignIn this systematic review of reasons in ethical literature, we selected sources based on predefined criteria: The publication mentions moral reasons or arguments directly relating to the creation and/or use of organoid models in biomedical research; These moral reasons and arguments are significantly addressed, not as mere passing mentions, or comprise a large portion of the body of work; The publication is peer-reviewed and published (...) in an academic article, book, national-level report, working paper, or Ph.D. thesis; The publications collected are in English.AnalysisEach article was read in-depth for identifiable moral reasons, arguments, and concerns. These were then inductively classified and synthesized to create broader categories of reasons, and eventually an overarching conceptual scheme was created.ResultsA total of twenty-three sources were included and analyzed out of an initial 266 collected sources. Five themes of ethical issues and arguments were found: Animal Experimentation; Clinical Applications and Experiments; Commercialization and Consent; Organoid Ontology and Moral Status; and Research Ethics and Research Integrity. These themes are then further broken down into sub-themes and topics. Given the extensive nature of the topics found, we will focus on describing the topics that comprised of more in-depth reasons and arguments rather than few, passing mentions or concerns.ConclusionsThe ethics of organoids requires further deliberation in multiple areas, as much of the discussions are not presented as in-depth arguments. Such sentiments are also echoed throughout the organoid ethics literature. (shrink)

Cerebral organoid models in-of-themselves are considered as an alternative to research animal models. But their developmental and biological limitations currently inhibit the probability that organoids can fully replace animal models. Furthermore, these organoid limitations have, somewhat ironically, brought researchers back to the animal model via xenotransplantation, thus creating hybrids and chimeras. In addition to attempting to study and overcome cerebral organoid limitations, transplanting cerebral organoids into animal models brings an opportunity to observe behavioral changes in the animal itself. Traditional animal (...) ethics frameworks, such as the well-known three Rs (reduce, refine, and replace), have previously addressed chimeras and xenotransplantation of tissue. But these frameworks have yet to completely assess the neural-chimeric possibilities. And while the three Rs framework was a historical landmark in animal ethics, there are identifiable gaps in the framework that require attention. The authors propose to utilize an expanded three Rs framework initially developed by David DeGrazia and Tom L. Beauchamp, known as the Six Principles (6Ps). This framework aims to expand upon the three Rs, fill in the gaps, and be a practical means for assessing animal ethical issues like that of neural-chimeras and cerebral organoid xenotransplantation. The scope of this 6Ps application will focus on two separate but recent studies, which were published in 2019 and 2020. First, they consider a study wherein cerebral organoids were grown from donors with Down syndrome and from neurotypical donors. After these organoids were grown and studied, they were then surgically implanted into mouse models to observe the physiological effects and any behavioral change in the chimera. Second, they consider a separate study wherein neurotypical human embryonic stem cell-derived cerebral organoids were grown and transplanted into mouse and macaque models. The aim was to observe if such a transplantation method would contribute to therapies for brain injury or stroke. The authors place both studies under the lens of the 6Ps framework, assess the relevant contexts of each case, and provide relevant normative conclusions. In this way, they demonstrate how the 6Ps could be applied in future cases of neural-chimeras and cerebral organoid xenotransplantation. (shrink)

That they are ‘following the science’ has become the watchword of many politicians during the present pandemic, especially when imposing or prolonging lockdowns or other liberty-restricting regulations. The scientists who advise politicians however are usually careful to add that the decision what to restrict and when is ultimately a political one. In science, as in medical practice, there is a delicate balance to be maintained between confidence in the best available information, and the necessary caveat that the assumptions and calculations (...) on which that information is based are subject to further scientific enquiry. For politicians and the public, moreover, as for patients, whether those informing them are judged to be trustworthy is a necessary consideration, a judgement determined by a variety of personal and political contingencies and circumstances. Ethics, by contrast, unable to appeal to scientific consensus or political authority, let alone a confidence-inspiring bedside manner, must rest the case for its essentially contestable assumptions and arguments being judged trustworthy, on its willingness to admit all reasoned voices to a conversation that is potentially unending, but in the process often highly enlightening. That conversation is contributed to in this issue of the Journal by several reasoned voices, mostly on ethical aspects of the COVID-19 pandemic. Relevant to issues on which politicians claim to be ‘following the science’, but also raising fundamental ethical questions, is this month’s feature article. In Ethics of Selective Restriction of Liberty in a Pandemic, 1 Cameron and colleagues consider ‘if and when it may be ethically acceptable to impose selective liberty-restricting measures in order to reduce the negative impacts of a pandemic by preventing particularly vulnerable groups [for example, the elderly in COVID-19] of the community from contracting the disease’ [and thereby, for example, increasing …. (shrink)