▁the ▁right ▁conditions ▁and ▁signals . ▁However , ▁recent ▁adv ances ▁by ▁Shin ya ▁Y aman aka ▁et ▁al . ▁have ▁found ▁ways ▁to ▁create ▁pl ur ip ot ent ▁cells ▁without ▁the ▁use ▁of ▁such ▁controvers ial ▁cell ▁cult ures . ▁Using ▁the ▁patient ' s ▁own ▁cells ▁and ▁re - d iffer enti ating ▁them ▁into ▁the ▁desired ▁cell ▁type ▁by pass es ▁both ▁possible ▁patient ▁re jection ▁of ▁the ▁emb ry onic ▁stem ▁cells ▁and ▁any ▁eth ical ▁concerns ▁associated ▁with ▁using ▁them , ▁while ▁also ▁providing ▁research ers ▁a ▁larger ▁supply ▁of ▁available ▁cells . ▁However , ▁induced ▁pl ur ip ot ent ▁cells ▁have ▁the ▁potential ▁to ▁form ▁ben ign ▁( though ▁potentially ▁m align ant ) ▁tum ors , ▁and ▁tend ▁to ▁have ▁poor ▁surv iv ability ▁in ▁v ivo ▁( in ▁the ▁living ▁body ) ▁on ▁dam aged ▁t issue . ▁Much ▁of ▁the ▁eth ics ▁concerning ▁use ▁of ▁stem ▁cells ▁has ▁subs ided ▁from ▁the ▁emb ry onic / ad ult ▁stem ▁cell ▁debate ▁due ▁to ▁its ▁rendered ▁mo ot , ▁but ▁now ▁soci eties ▁find ▁themselves ▁deb ating ▁whether ▁or ▁not ▁this ▁technology ▁can ▁be ▁eth ically ▁used . ▁En h anc ements ▁of ▁tra its , ▁use ▁of ▁animals ▁for ▁t issue ▁sc aff old ing , ▁and ▁even ▁arguments ▁for ▁moral ▁deg ener ation ▁have ▁been ▁made ▁with ▁the ▁fear s ▁that ▁if ▁this ▁technology ▁reaches ▁its ▁full ▁potential ▁a ▁new ▁parad ig m ▁shift ▁will ▁occur ▁in ▁human ▁behavior . ▁