Photo cross-linkable biodendrimers as ophthalmic adhesives for central lacerations and penetrating keratoplasties

Photo cross-linkable biodendrimers as ophthalmic adhesives for central lacerations and penetrating keratoplasties
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DOI:
10.1167/iovs.06-0957
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发表时间:
2007-05-01
影响因子:
4.4
通讯作者:
Grinstaff, Mark W.
Grinstaff, Mark W.
中科院分区:
医学2区
文献类型:
--
作者:
Degoricija, Lovorka;Johnson, C. Starck;Grinstaff, Mark W.

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目的.基于生物树枝状聚合物的水凝胶粘合剂衍生自生物相容性结构单元和3,400、10,000和20,000 g/mole的聚(乙二醇)。当这些粘合剂用于封闭4.1-mm中央裂伤和穿透性角膜移植术(PKP)时,测定了这些粘合剂的泄漏压力。在光引发剂的存在下,将一定重量范围的三种生物树枝状聚合物([G1]-PGLSA-MA)(2)-PEG(3,400)、([G1]-PGLSA-MA)(2)-PEG(10,000)和([G1]-PGLSA-MA)(2)-PEG(20,000)各自光交联以形成水合网络。这些基于生物树枝状聚合物的粘合剂直接应用于4.1 mm的线性中央撕裂伤。在PKP中,最初用8或16根缝线固定角膜扣,然后用粘合剂密封。对于4.1 mm中央撕裂伤,20%和40% wt/vol的([G1]-PGLSA-MA)(2)-PEG(3,400)、10和20% wt/vol的([G1]-PGLSA-MA)(2)- PEG(10,000)和20% wt/vol的([G1]-PGLSA-MA)(2)- PEG(20,000)保持泄漏压力高于200 mm Hg。在具有16根缝线的自体移植物中,20%wt/vol的([G1]-PGLSA-MA)(2)-PEG(3)、(400)、([G1]-PGLSA-MA)(2)-PEG(10,000)和([G1]-PGLSA-MA)(2)-PEG(20,000)保持在100 mm Hg或以上的压力。在具有8根缝线的自体移植物中,20%wt/vol的([G1]-PGLSA-MA)(2)-PEG(10,000)和([G1]-PGLSA-MA)2-PEG 20,000制剂分别保持85 22和80 30 mm Hg的泄漏压力。10% wt/vol([G1]-PGLSA-MA)(2)-PEG(10,000)制剂在用于固定4.1 mm中央撕裂伤时可抑制泄漏压力超过200 mm Hg。20% wt/vol([G1]-PGLSA-MA)(2)-PEG(10,000)和([G1]-PGLSA-MA)(2)-PEG(20,000)制剂(含8或16根缝线)可确保PKP远高于正常IOP。基于生物树枝状聚合物的粘合剂在修复角膜伤口方面具有潜在用途。
PURPOSE. Biodendrimer-based hydrogel adhesives were derived from biocompatible building blocks and poly(ethylene glycol) of 3,400, 10,000 and 20,000 g/mole. The leaking pressures were determined for these adhesives when used to seal 4.1-mm central lacerations and penetrating keratoplasties (PKPs) in enucleated porcine eyes.METHODS. Three biodendrimers, ([G1]-PGLSA-MA)(2)-PEG(3,400), ([G1]-PGLSA-MA)(2)-PEG(10,000), and ([G1]-PGLSA-MA)(2)-PEG(20,000) at a range of weight percents were each photo cross-linked in the presence of a photo-initiator to form a hydrated network. These biodendrimer-based adhesives were applied directly to a 4.1-mm linear central laceration. In a PKP, the corneal button was initially secured with 8 or 16 sutures and then sealed with the adhesive.RESULTS. For the 4.1-mm central lacerations, the ([G1]-PGLSA-MA)(2)-PEG(3,400) at 20% and 40% wt/vol, the ([G1]-PGLSA-MA)(2)- PEG(10,000) at 10 and 20% wt/vol, and the ([G1]-PGLSA-MA)(2)- PEG(20,000) at 20% wt/vol held to leaking pressures above 200 mm Hg. In the autograft with 16 sutures, the 20% wt/vol of the ([G1]-PGLSA-MA)(2)-PEG(3),(400), ([G1]-PGLSA-MA)(2)-PEG(10,000), and ([G1]-PGLSA-MA)(2)-PEG(20,000) held to a pressure at or above 100 mm Hg. In the autograft with eight sutures, the ([G1]-PGLSA-MA)(2)-PEG(10,000) and ([G1]-PGLSA-MA)2-PEG20,000 formulations at 20% wt/vol held to leaking pressures of 85 22 and 80 30 mm Hg, respectively.CONCLUSIONS. The 10% wt/vol ([G1]-PGLSA-MA)(2)-PEG(10,000) formulation withheld leaking pressures above 200 mm Hg when used to secure a 4.1 mm central laceration. The 20% wt/vol ([G1]-PGLSA-MA)(2)-PEG(10,000) and ([G1]-PGLSA-MA)(2)-PEG(20,000) formulations, with 8 or 16 sutures, secured the PKP well above normal IOP. Biodendrimer-based adhesives are of potential use for repairing corneal wounds.