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史上首次:日本确认iPS视细胞能让眼睛恢复感光

2017-01-13 佚名 中新网

据日媒报道,日本理化学研究所多细胞系统形成研究中心(位于神户市)的研究小组在本月10日的美国科学杂志网络版上发表一项研究成果,确认iPS视细胞能让眼睛恢复感光。 据报道,结果显示,研究者让诱导多能干细胞(iPS细胞)变为视网膜的视细胞,并移植到因晚期“视网膜色素变性症”失明的老鼠眼中,结果老鼠变得眼睛能够感光了。这是首次确认使用ips细胞能够恢复感光功能。 副项目带头人万代道子解释说

据日媒报道,日本理化学研究所多细胞系统形成研究中心(位于神户市)的研究小组在本月10日的美国科学杂志网络版上发表一项研究成果,确认iPS视细胞能让眼睛恢复感光。 据报道,结果显示,研究者让诱导多能干细胞(iPS细胞)变为视网膜的视细胞,并移植到因晚期“视网膜色素变性症”失明的老鼠眼中,结果老鼠变得眼睛能够感光了。这是首次确认使用ips细胞能够恢复感光功能。

副项目带头人万代道子解释说:“我认为现阶段是能感受到少许光亮,视野稍有拓宽的程度。”她计划也用人类ips细胞进行验证,在2年以内申请临床研究。

据悉,视细胞的功能是接收光亮,然后传递给视网膜的神经细胞。如果视细胞发生变性而消失,就会出现“视网膜色素变性”,造成视力减弱,甚至失明。

研究小组在实验中的做法是:在老鼠所在的房间有光亮5秒后就给予电击,让老鼠学会在感觉到光亮时,为了免遭电击而逃入相邻的房间。结果,因晚期“视网膜色素变性症”失明9只老鼠没有逃跑。

另一方面,研究小组把用ips细胞制作的视网膜前期组织移植到老鼠双眼中,令其变成视细胞。这样的10只老鼠中,有4只变得在房间有光亮后会逃走,恢复了感光功能。

报道还称,在该实验中,移植的部分不足全视野的5%。如果扩大移植范围,恢复率有可能增大。

研究小组的项目带头人高桥政代等2014年在全球首次使用ips细胞制作的视网膜色素上皮细胞,移植给因“渗出型老年黄斑变性”而视力减弱的患者,手术获得了成功。该手术虽然具有维持视力的效果,但从检查上未能确认是否恢复了感光功能。

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    2017-01-16 往日如昨

    继续学习中

    0

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    2017-01-15 chengjn
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    2017-01-13 蔬菜

    日本人牛啊

    0

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