打开APP

PLoS One:日研究发现一种化合物能促进角膜神经再生

  1. Semaphorin 3A
  2. 角膜神经再生

来源:新华网 2012-11-18 15:08

日本庆应义塾大学教授冈野荣之率领的研究小组最新发现,一种化合物能促进被切断的角膜感觉神经再生。 角膜有丰富的感觉神经,但在近视矫正、角膜移植等手术中,感觉神经可能被切断,感染也可能破坏神经,损害患者的视力。通常感觉神经再生需要数个月至一两年左右时间,促进神经再生则能改善症状。 研究小组注意到,一种称为“臂板蛋白3A”(sema3A)的蛋白质会遏制神经生长。

日本庆应义塾大学教授冈野荣之率领的研究小组最新发现,一种化合物能促进被切断的角膜感觉神经再生。

角膜有丰富的感觉神经,但在近视矫正、角膜移植等手术中,感觉神经可能被切断,感染也可能破坏神经,损害患者的视力。通常感觉神经再生需要数个月至一两年左右时间,促进神经再生则能改善症状。

研究小组注意到,一种称为“臂板蛋白3A”(sema3A)的蛋白质会遏制神经生长。他们从土壤的霉菌中提取出能抑制这种蛋白质功能的化合物SM-345431,给移植角膜的实验鼠注射。约3周后检查发现,角膜的感觉神经已经再生,而对照组的实验鼠则没有这种现象。

目前,研究人员正在使用诱导多功能干细胞(iPS细胞)等研究实现角膜的再生,而要想使移植的角膜发挥功用,就必须使神经再生。冈野等人在新一期《科学公共图书馆综合卷》报告研究小组指出:“这种化合物将来有可能作为治疗药物,提高角膜移植的成功率,从而有助于对角膜手术的术后管理。”(生物谷Bioon.com)

The Semaphorin 3A Inhibitor SM-345431 Accelerates Peripheral Nerve Regeneration and Sensitivity in a Murine Corneal Transplantation Model

Masahiro Omoto, Satoru Yoshida, Hideyuki Miyashita, Tetsuya Kawakita, Kenji Yoshida, Akiyoshi Kishino, Toru Kimura, Shinsuke Shibata, Kazuo Tsubota, Hideyuki Okano, Shigeto Shimmura

Background Peripheral nerve damage of the cornea is a complication following surgery or infection which may lead to decreased visual function. We examined the efficacy of the semaphorin 3A inhibitor, SM-345431, in promoting regeneration of peripheral nerves in a mouse corneal transplantation model. Methodology/Principal Findings P0-Cre/Floxed-EGFP mice which express EGFP in peripheral nerves cells were used as recipients of corneal transplantation with syngeneic wild-type mouse cornea donors. SM-345431 was administered subconjunctivally every 2 days while control mice received vehicle only. Mice were followed for 3 weeks and the length of regenerating nerves was measured by EGFP fluorescence and immunohistochemistry against βIII tubulin. Cornea sensitivity was also measured by the Cochet-Bonnet esthesiometer. CD31 staining was used to determine corneal neovascularization as a possible side effect of SM-345431. Regeneration of βIII tubulin positive peripheral nerves was significantly higher in SM-345431 treated mice compared to control. Furthermore, corneal sensitivity significantly improved in the SM-345431 group by 3 weeks after transplantation. Neovascularization was limited to the peripheral cornea with no difference between SM-345431 group and control. Conclusions/Significance Subconjunctival injections of SM-345431 promoted a robust network of regenerating nerves as well as functional recovery of corneal sensation in a mouse keratoplasty model, suggesting a novel therapeutic strategy for treating neurotrophic corneal disease.

版权声明 本网站所有注明“来源:生物谷”或“来源:bioon”的文字、图片和音视频资料,版权均属于生物谷网站所有。非经授权,任何媒体、网站或个人不得转载,否则将追究法律责任。取得书面授权转载时,须注明“来源:生物谷”。其它来源的文章系转载文章,本网所有转载文章系出于传递更多信息之目的,转载内容不代表本站立场。不希望被转载的媒体或个人可与我们联系,我们将立即进行删除处理。

87%用户都在用生物谷APP 随时阅读、评论、分享交流 请扫描二维码下载->