BackgroundClustered Regularly Interspaced Short Palindromic Repeats-associated technology may allow for efficient and highly targeted gene editing in single-cell embryos. This possibility brings human germline editing into the focus of ethical and legal debates again.Main bodyAgainst this background, we explore essential ethical and legal questions of interventions into the human germline by means of CRISPR-Cas: How should issues of risk and uncertainty be handled? What responsibilities arise regarding future generations? Under which conditions can germline editing measures be therapeutically legitimized? For this (...) purpose, we refer to a scenario anticipating potential further development in CRISPR-Cas technology implying improved accuracy and exclusion of germline transmission to future generations. We show that, if certain concepts regarding germline editing are clarified, under such conditions a categorical prohibition of one-generation germline editing of single-cell embryos appears not to be ethically or legally justifiable.ConclusionThese findings are important prerequisites for the international debate on the ethical and legal justification of germline interventions in the human embryo as well as for the harmonization of international legal standards. (shrink)

Recent results from studies on animals suggest that functional germ cells may be generated from human pluripotent stem cells, giving rise to three possibilities: research with these so‐called artificial gametes, including fertilization experiments in vitro; their use in vivo for therapy for the treatment of human infertility; and their use in assisted reproductive technologies in vitro. While the legal, philosophical, and ethical questions associated with these possibilities have been already discussed intensively in other countries, the debate in Germany is still (...) at its beginning. A systematic and detailed analysis of the legal framework in Germany is provided with regard to the three possibilities, including the applicable statutory laws as well as the constitutional law. The question emerges as to whether the statutory laws as well as the constitution justify a distinction to be made between embryos of artificial and natural origin. This question is subject to philosophical analysis, discussing the distinction between person and thing, dignity and price, personality and property, and nature and technique. As a result, the criterion of naturalness alone may not be sufficient to differentiate between embryos of natural and artificial origin, and other criteria need to be identified. (shrink)

Biographische Informationen Tobias Cantz leitet die Arbeitsgruppe "Translationale Hepatologie und Stammzellbiologie" im Exzellenzcluster REBIRTH. Prof. Dr. Hans-Georg Dederer lehrt Staats- und Verwaltungsrecht, Europarecht und internationales Wirtschaftsrecht an der Universität Passau. Prof. Dr. Thomas Heinemann lehrt "Ethik, Theorie und Geschichte der Medizin" an der Philosophisch-Theologischen Hochschule Vallendar.