news in brief China’s human-cloning policy fudges law on cross-species fusions Tokyo China has outlawed human reproductive cloning but has not legislated for or against controversial pioneering work that fuses human cells with eggs of other species. Guidelines issued by the Chinese Ministry of Science and Technology and the Ministry of Health ban the crossspecies fusion of eggs and sperm. But they make no mention of techniques used by Huizhen Sheng of Shanghai Second Medical University to reprogramme human cells by fusing them with rabbit eggs emptied of their genetic material (see Nature 424, 711; 2003). The legislation, announced last week, permits the derivation of embryonic-stemcell lines from surplus embryos left over from in vitro fertilization and embryos created by transferring adult cells into empty eggs — a process known as therapeutic cloning or somatic-cell nuclear transplantation. But such embryos cannot be grown beyond 14 days. Scientific advisers to the Chinese government say that the guidelines are based on the relatively liberal UK legislation. ……………………………………………………………… …………………………………………………… 文章见附件 相关附件 |