8 Z9 A- ^' V6 {5 W) B2 p- l 她说:“我对这个新手术可能达到的效果感到十分激动。它有可能挽救、保护和恢复和我同样遭受折磨的患者的视力。即使我的视力只能恢复一点儿,也比没有任何希望强。另外,它还意味着试验团队会获得宝贵的经验。目前还没有任何其它方法真的能够帮助避免这种失明带来的后果。这一及时治疗不仅将给角膜盲症患者带来福音,还将对我的儿子有所帮助,他也同样罹患此病。” o" o1 n; }- U# k1 l 7 Y: q6 C7 L- x, s0 z “对我个人而言,我有机会恢复多年来丧失的大部分视力,这不仅使我有可能获得更好的生活质量,而且将使我能够再工作十年时间甚至更久。这是一个不容轻视的机会,也是一个不容错过的机会。”Sylvia补充道。 + r8 u3 n) }0 b# y. ?7 E! ~2 {0 P/ D$ a$ |1 b$ K" G L/ n. q1 o8 ?
6 Z% v% x b% ^6 J( m 手术主要步骤 1 _1 u( \1 O9 e( X( v 0 P2 s& Q" K3 o4 F. Z ' _! ^4 c; A T8 T4 \( F" i 在外科手术室或无菌室中将角膜缘从角膜上分离。 $ x3 F; G3 R& e1 F 7 M/ Z7 m6 U1 X3 V4 j4 h I: Y7 a 将角膜缘组织片放在羊膜上,在无菌室培养两个星期。; T. ] a; u: Y2 i# \. i" i% @7 c: ]
% d' q2 c, E4 g! N! E0 z 对所有捐献者进行传染病检查。此外,对捐献组织进行细菌污染检验。 - M: k/ O2 V* g2 Z + A4 A X! e1 n6 k8 K
在使用前对组织进行存活力和生长力监测。8 x7 @4 c1 D3 C6 D. O5 J' E, Z
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在手术室中对患眼的表面进行清创,然后将组织覆盖于眼表面。 8 E5 b: I+ Z' }6 c$ g/ Q: R+ k% y. V ! ?9 a# ?$ J2 ~( b: x$ b' E+ D0 j 成体干细胞将在长期内继续分离并补充患者的角膜。 : p4 e. G" V2 T( @; J1 U / p* h; B0 g* L3 C) j0 J" {6 a; D n' ?2 Z4 h) o4 E
2楼原文 感谢yuhaoze 提供作者: yuhaoze 时间: 2012-6-6 19:54 标题: Comment
本帖最后由 yuhaoze 于 2012-6-6 19:56 编辑 ) Q" }5 |3 N6 p; p # {: L* B- [) Z% P6 A# UFinally, allogeneic limbal stem cells commenced to treat bilateral limbal epithelial stem cell deficient ( LSCD ) patients (though in its prephase clinic trial), I believe that this "revolutionary" idealization will be utilized by Chinese Scientists in the recent future, and institutions dedicating to this promising field will spring out faster than any other country, maybe in Xi'an, Tianjin or Qingdao.# e$ s' S# L9 V8 O# a" t3 i
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Although, as mentioned above in the news, curable therapies for unilateral or sectorial LSCD such like autograft and cultured autologous limbal epithelial stem cell transplantations have been clinically engrafted to retrieve optical perception of the suffering patients, the successfulness was not that much, with only two papers published sparsely in American Journal of Ophthalmology and New England Journal of Medicine in 1997 and 2010, respectively, announcing that 71% patients regained transparent corneal after repeated transplantations, in spite of the conspicuous concern that separation procedures of grafts or cells may jeopardize the integrity and vision clarity of the contralateral healthy eye, let alone the stringent criterion that p63 positive cells in the amnion-based culture system must transcend 3% to generate a functional engraftation. / E0 V7 n9 D) ^/ ~- t6 p5 n e! }$ P3 v2 M4 a! q2 g7 {4 @) L
The truth is, the difficulty of allogeneic limbal stem cell transplantation is far beyond that of the autografts with regard to source of cells, system of culture and incubation, control of immune rejection, you name it. So, in my words, allografts transplantation is only a concept that has not achieved any decent success in any animal models, how can it enter phase I clinic trial? % M/ G0 }4 C* P; `3 S1 l
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"Besides, current evidence on the safety and efficacy of tissue-cultured limbal stem cell allograft transplantation for regrowth of corneal epithelium does not appear adequate for this procedure to be used without special arrangements for consent and for audit or research" written on the bulletin of National Institute for Health and Clinical Excellence, one can imagine that allogeneic limbal stem cell transplantation still has a quite long way to go. l: S) x% s) d. Q4 j9 m作者: yuhaoze 时间: 2012-6-7 08:42