Preparation method for artificial corneas

Abstract

The invention discloses a preparation method for artificial corneas. The preparation method comprises the following steps of (1) collecting age-appropriate pig eyeballs; (2) scraping corneal epithelial cells and corneal endothelial cells of the pig eyeballs, reserving bowman layers, preparing lamellar corneas by using a lamellar blade, and drilling size-specific corneal slices; (3) putting the corneal slices obtained in step (2) in liquid nitrogen for 8-35 minutes, slowly rewarming the corneal slices to room temperature under normal temperature and normal pressure after the corneal slices are taken out, repeating the operation for 4-12 times; (4) putting the corneal slices which are subjected to freezing-thawing treatment in step (3) in normal saline for carrying out ultrasonic cleaning, wherein the ultrasonic working frequency is 20-250 kHz, and the ultrasonic time is 15-65 minutes; (5) putting the corneal slices which are subjected to ultrasonic treatment in a buffer system, carrying out enzymolysis on DNA (Deoxyribose Nucleic Acid) of corneal stromal cells by using endonuclease, and obtaining the artificial corneas. According to the artificial corneas prepared by the preparation method disclosed by the invention, gaps between natural collagen fibers of the artificial corneas are beneficial for inducing the growth of the corneal cells and the growth of nerve fibers of an acceptor and promoting the repairing and the reconstructing of corneas of a donor.

Description

Technical field [0001] The invention belongs to the technical field, and specifically relates to a preparation method of an artificial cornea. Background technique [0002] The cornea is located at the forefront of the eyeball and is the first refractive interstitium through which light passes. Its transparency is the first element to ensure good visual function. Therefore, artificial cornea is different from other tissue engineering products. After being prepared by different methods, it not only needs to maintain the good mechanical properties of its extracellular scaffold, but also requires high transparency of the scaffold material. [0003] There are many methods for preparing artificial cornea, but the effect is not good in practical application. [0004] Artificial cornea first appeared in clinical trials in the 1960s, initially using glass material to sew it directly onto the surface of the eye. Although this treatment method can improve the patient's vision, the rejection ...

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Problems solved by technology

Although the creative introduction of autologous tissue as part of the cornea reduces the rejection rate and restores vision better a...

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