DEF­I­NI­TION al­lo­graft

Metro Canada (Ottawa) - - Front Page - The new­ly­weds were so in sync, I al­most toasted to their mu­tual heart

MAK­ING A MINI BRAIN

In 2013, sci­en­tists put these

into a ma­chine called a and tossed them in a bath of nu­tri­ents and pro­teins un­til they turned into brain cells. Amaz­ingly, they self-as­sem­bled into com­plex, mul­ti­part, func­tional struc­tures sim­i­lar to em­bry­onic hu­man brains — ex­cept they are the size of a len­til.

INTO THE MIND OF A MOUSE

Now sev­eral re­search teams man­aged to im­plant hu­man mini-brains into the brains of mice and rats. In var­i­ous ex­per­i­ments, hu­man brain bits con­nected to blood sup­ply, grew new neu­rons, and lit up when stim­u­lated. An is a cell, tis­sue or or­gan trans­plant from a dif­fer­ent mem­ber of your own species.

USE IT IN A SEN­TENCE

in­duced pluripo­tent stem cells

biore­ac­tor What are the eth­i­cal im­pli­ca­tions of putting hu­man brains into ro­dents? Tune in Fri­day at 12 p.m.

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