Departmental Bulletin Paper iPS細胞 (人工多能性幹細胞) 時代の人間の性と性愛に関する一考察

安岡, 譽  ,  橋本, 忠行

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2012年度のノーベル医学生理学賞を受賞した京都大学の山中伸弥教授らが開発したiPS細胞(人工多機能性幹細胞)の出現は,従来の人間の性や性愛の概念について根本的な再考を余儀なくされることを予測させた点で,私たちに大きな衝撃を与えている。そこで筆者らは,まずこれまでの人間の性と性愛について,精神医学と臨床心理学の立場からの理解のレビューを試みた。そのうえで次に,将来に予測される人間の性と性愛に関する概念に大きな変更を余儀なくされる可能性について検討した。そして,iPS細胞の技術の今後の発展がもたらすと予測される事態と課題は,1)同性配偶による子の誕生と「処女生殖」(単為生殖)の可能性,2)男性と女性という2性の概念そのものの変化の可能性,3)性の精神病理を新たな視点から理解することと,性的障害の診断と治療に関して慎重な判断と対応がせまられること,4)当面は,家族・家庭の再生と再建がより重要な課題となること,と考えられた。最後に,筆者らの現時点での人類の未来予測を述べ,若干の考察と私見についてふれた。
In 2012, Dr. Sinya YAMANAKA (Professor of Kyoto University) et al. were winner of a novel prize in physiology or medicine, by the contribution of “induced Pluripotent Stem cell” (iPS cell) creation. This epoch-making iPS cell appearance has given a great shock not only to medical areas positively, but also to psychiatric-psychological areas somewhat negatively, because the latter unexpectedly needed to face with a new problem or new perplexing possibility of human nature and future that urges some change of concepts about human sex, gender, and sexuality. In this paper, the authors have made an attempt to consider and to reconsider the era of iPS cells from the psychiatric-psychological point of view based of our review of traditional understandings of human sexuality. In terms of this context, our theoretical predictive conclusion are as follow : 1)The possibility of realization of artificial human (baby) reproduction by the technical use of iPS cell, e.g. same-sex marriage (homosexual couple) or virgin birth (virgin generation). 2)The possibility of change of standard concept on two-sex reality (male and female, boys and girls, man and woman). 3)The possibility of definitive change of sexual disorders. It’s diagnostic criteria and it’s treatment may be changed carefully by the concept change of human sex, gender and sexuality. 4)For the time being, the human revitalization in the family and family reconstruction will be the most important task of human-being for the sake of protecting human sexual identity confusion. Finally, the authors has described on the status quo and future change of human existence in the times of iPS cell’s appearance and its biological technical application. Some considerations on the theoretical anticipation, namely, the prospect of human-race future has discussed herein.
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