SCI REP:合成生物视网膜,这位牛津大学在读女博士很“拼”

2017-05-06 Flora 生物探索

Vanessa Restrepo-Schild是一名就读于牛津大学化学系的理科博士生。年仅24岁的她带领团队合成出世界首个柔软的生物双层视网膜组织。这一研究有望彻底改变仿生植入产业,促成新的微创技术,从而帮助退行性眼疾的治疗,例如视网膜色素变性。相关研究成果发表在《Scientific Reports》期刊,Restrepo-Schild是文章的一作。视网膜位于眼球壁的内层,是一层透明的薄膜,专门

Vanessa Restrepo-Schild是一名就读于牛津大学化学系的理科博士生。年仅24岁的她带领团队合成出世界首个柔软的生物双层视网膜组织。



这一研究有望彻底改变仿生植入产业,促成新的微创技术,从而帮助退行性眼疾的治疗,例如视网膜色素变性。相关研究成果发表在《Scientific Reports》期刊,Restrepo-Schild是文章的一作。

视网膜位于眼球壁的内层,是一层透明的薄膜,专门负责感光成像。当视觉信息(光信号)经视网膜细胞处理后会转换为电信号,进一步传递给神经系统,引发大脑反应,最终建立图像。

迄今为止,所有的人工视网膜研究都局限在坚硬的材料上。Vanessa Restrepo-Schild带领团队打破空白,研发出一种新合成的生物双层视网膜,高度类似于真正的人类视网膜。

这一“高仿”视网膜由柔然的水凝胶和细胞膜蛋白——细菌视紫红质(bacteriorhodopsin,bR)组成。按照照相机的理念设计,细胞负责响应光线,并形成一个灰度图像。这一合成材料能够生成刺激神经元的电信号。


视网膜由柔然的水凝胶和细胞膜蛋白构成,它能够感应光线,并建立灰度图像。(图片来源:牛津大学)

与现有的人工视网膜植入物不同,Vanessa Restrepo-Schild团队开发的视网膜由天然、可降解的生物材料构成,不包含外源物或者活体物质。这意味着,该视网膜的侵入性更小,且引发不良反应、副作用的概率相对较低。

对此,Restrepo-Schild强调:“我们的眼睛很敏感,这也是为什么金属类视网膜植入物易对眼睛造成损伤、引发炎症的原因。但是,生物合成的植入物柔软且亲和,这有助于眼睛接受它。”

谈及这一开创性研究的契机,Restrepo-Schild表示:“我一直沉迷于生命医学,想证明现有的技术能够在不依赖于活体细胞的前提下,用于重塑人体组织的功能。我希望能够利用实验室材料重复出包括听觉、视觉、触觉等在内的重要机能。”

虽然目前该技术还处于在实验室测试中,Restrepo-Schild团队试图依据这一基础研究成果寻找潜在的生物学材料。Restrepo-Schild已为这一技术申请专利。下一步,她们将验证并拓宽这一人工视网膜的功能,例如识别不同的颜色、形状。

原始出处:

Restrepo Schild V, Booth MJ, Box SJ,et al. Light-Patterned Current Generation in a Droplet Bilayer Array. Sci Rep. 2017 Apr 18.

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    2017-05-08 zutt
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    2017-05-07 lyh994

    太好了,越来越深入了

    0

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    2017-05-06 飛歌

    学习了很有用

    0

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该研究用于评估急性后玻璃体脱落患者发生多发性视网膜撕裂的可能危险因素。三百七十六名患者持续表现出眼前漂浮物与潮热症状,对眼前漂浮物与潮热症状的持续时间、闪烁、视网膜分离的家族史、外周视网膜退行性变、晶状体状态、近视、烟粉尘、视网膜或玻璃体出血等因素与视网膜撕裂的关系进行探究分析。

Crit Care:脓毒症患者视网膜动脉血流及视网膜改变!

由此可见,延长RAFT的患者视网膜血管成像变化更加频繁和心脏指数更低,而填充时间较短的患者炎症标志物水平较高。

Sci Rep:改进型光开关药物有望成为视觉恢复新药物

4月13日发表在《科学报告》上的文章Restoring visual function to the blind retina with a potent, safe and long-lasting photoswitch提出一种新的化合物,可以帮助失明老鼠的视网膜暂时性恢复视觉响应。作为光开关,BENAQ能够较为有效持久地恢复视力。视网膜色素变性和衰老引起的黄斑变性是眼部易患的两大退行性疾病,