Transplanted pluripotent stem cell-derived photoreceptor precursors elicit conventional and unusual light responses in mice with advanced retinal degeneration

Transplanted pluripotent stem cell-derived photoreceptor precursors elicit conventional and unusual light responses in mice with advanced retinal degeneration
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移植的多能干细胞衍生的光感受器前体在患有​​晚期视网膜变性的小鼠中引发常规和异常的光反应

DOI:
10.1101/2020.09.22.308726
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发表时间:
2020
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通讯作者:
Zerti D
Zerti D
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作者:
Zerti D

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视网膜营养不良常常导致失明。因此,开发恢复视力的治疗干预措施至关重要。在这里,我们证明了多能干细胞衍生的锥前体植入和恢复在thePde 6 brd 1小鼠,一个终末期光感受器退化模型的光反应的能力。我们的数据表明,高达1.5%的前体整合到宿主视网膜,分化成锥细胞,并在近贴壁植入到宿主双极细胞。一半的移植小鼠表现出视觉行为,其中33%表现出双眼光敏感性。大多数视网膜神经节细胞表现出对比敏感的ON、OFF或ON-OFF光反应,甚至运动敏感性;然而,相当多的细胞表现出不寻常的反应(例如,光诱导的抑制),可能反映了神经视网膜的重塑。我们的数据表明,尽管移植产量相对较低,多能干细胞衍生的视锥细胞前体可以引起光反应,即使在先进的退化阶段。需要进一步的工作来提高植入产量和抵消视网膜重塑,以实现有用的临床应用。
Retinal dystrophies often lead to blindness. Developing therapeutic interventions to restore vision is therefore of paramount importance. Here we demonstrate the ability of pluripotent stem cell-derived cone precursors to engraft and restore light responses in thePde6brd1mouse, an end-stage photoreceptor degeneration model. Our data show that up to 1.5% of precursors integrate into the host retina, differentiate into cones, and engraft in close apposition to the host bipolar cells. Half of the transplanted mice exhibited visual behavior and of these 33% showed binocular light sensitivity. The majority of retinal ganglion cells exhibited contrast-sensitive ON, OFF or ON-OFF light responses and even motion sensitivity; however, quite a few exhibited unusual responses (eg, light-induced suppression), presumably reflecting remodeling of the neural retina. Our data indicate that despite relatively low engraftment yield, pluripotent stem cell-derived cone precursors can elicit light responsiveness even at advanced degeneration stages. Further work is needed to improve engraftment yield and counteract retinal remodeling to achieve useful clinical applications.
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