January 21, 2025
Human brain organoids, small structures grown from stem cells that replicate key aspects of human brain tissue, are a promising avenue for scientific research. These organoids can offer insights into brain development, neurological diseases, and the effects of various treatments. However, as the field of human brain organoid research advances, it brings with it a range of ethical, legal, and social issues that need careful consideration. A recent review by an international team of researchers highlights these concerns, calling for a responsible, multidisciplinary approach to guide future research in this field.
Human brain organoids are typically created from human pluripotent stem cells, which have the ability to differentiate into various cell types, including neurons. By controlling the environment in which these cells grow, researchers can create tissues that mimic certain structures and functions of brain tissues. This breakthrough has opened new doors for understanding neurological diseases and developmental processes. However, the rise of human brain organoids has also sparked important debates, particularly about the ethical implications of creating brain-like tissues in the lab.
One of the most debated concerns is the possibility that human brain organoids could develop some form of consciousness. While this possibility has been widely discussed, the review emphasizes that it is unlikely to occur in the near future. “The possibility that human brain organoids will develop consciousness has received a great deal of attention, both academically and socially,” Dr. Masanori Kataoka, the lead author notes, adding that the review aims to broaden the conversation to include other pressing issues that have been overlooked.
The review, which was titled “Beyond Consciousness” to capture the broad range of considerations, identifies a number of other critical concerns, such as their implantation into non-human animals (so-called “neural chimeras”) and the commercialization of human brain organoids and their potential to be used in biocomputing. While the issue of consciousness has dominated discussions, Dr. Tsutomu Sawai, one of the authors, points out that “we were able to identify a number of other pressing issues that deserve attention.” These include legal and social challenges, as well as the need for careful regulation of human brain organoid research as it grows more complex.
Despite existing laws and regulations providing a foundation for human brain organoid research, the review suggests that enhanced oversight will be necessary as the technology progresses. While the ethical challenges are most pronounced, legal considerations also need to be addressed to ensure the responsible development of this technology. The authors note that the field would benefit from greater international coordination and oversight, ensuring that governance structures evolve alongside the technology itself.
Another key aspect of the review is the call for greater public engagement. “For cutting-edge science and technology, it is very important to incorporate social attitudes and values,” Dr. Sawai states. The review stresses that while the importance of public participation in shaping the future of human brain organoid research has been widely acknowledged, concrete efforts to involve the public are still few. By fostering dialogue between researchers, ethicists, legal experts, and the public, the authors hope to bridge the gap between scientific advancements and societal values.
Looking ahead, the researchers call for continued exploration of the ethical, legal, and social issues surrounding human brain organoids. “In the future, we need to conduct further investigations into the commercialization of human brain organoids and the legal aspects, contributing to the responsible development of this field,” Dr. Sawai adds. Through ongoing dialogue and collaboration, researchers hope to ensure that human brain organoid technology is developed responsibly, with careful consideration of its societal impacts.
Writing: ThinkSCIENCE, Inc. (Tokyo, Japan)
Kataoka, M., Niikawa, T., Nagaishi, N., Lee, T.-L., Erler, A., Savulescu, J., & Sawai, T. (2024). Beyond consciousness: Ethical, legal, and social issues in human brain organoid research and application. European Journal of Cell Biology. https://doi.org/10.1016/j.ejcb.2024.151470