美国卡内基梅隆大学的专家周四发表报告,表示已成功用3D生物打印机打印出可运作的心瓣。他们更认为将来可望打印出整个心脏,为需要移植心脏的病人带来希望。
研究团队复制了复杂的细胞外基质,即用来支撑细胞结构及提供令器官运作的生化信号之生物支架。他们又用胶原蛋白打印心瓣,最终成功令心瓣运作。以往专家尝试打印细胞外基质时,总会出现准确度不足及细致度不够的问题,但团队克服了此问题。
此外,虽然胶原蛋白在所有人体组织中出现,但常在打印时变成果冻状。团队于是用快速改变酸碱度的方法,令胶原蛋白准确地凝固。
不过,团队要先在动物身上做实验,然后才能将此技术用于人体。日后或可帮助心脏或肝脏功能受损的病人。研究报告已刊登于《科学》期刊中。
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