Abstract:
:Corneal disease is the second cause of blindness in developing countries, where the number of corneal grafts needed by far exceeds the number available. In industrialized countries, although corneas are generally available for keratoplasty, onto inflamed and vascularized host beds they are often rejected despite immune-suppression. A non-immunogenic, transparent, cytocompatible stroma is therefore required, which can be lyophilized for long-term conservation. Decellularization methods were tested on porcine corneal stromas before validation on human corneas. Decellularization and lyophilization led to opacification of the stroma, which could be reversed by soaking in 100% glycerol. Cell-depleted transparized stromas were then lyophilized (LTDC) to allow their long-term conservation and water content was measured. The ultrastructure of LTDC corneas was examined by transmission electron microscopy (TEM). Histocompatibility antigens were undetectable on LTDC stromas by antibody staining. Finally, cytocompatibility of LTDC stromas was demonstrated on an ex vivo model of anterior lamellar keratoplasty. Differential staining was used to monitor colonization of LTDC stromas by cells from the receiving cornea. Only SDS-based decellularization produced acellular porcine stromas. The lowest SDS concentration tested (0.1%) was validated on human corneas. Unlike lyophilized corneas, LTDC stromas without residual water, express no histocompatibility markers, although TEM revealed the presence of cellular debris in an ultrastructural arrangement of collagen fibers very close to that of native corneas. This structure is compatible with colonization by cells from the receiver cornea in an ex vivo lamellar graft model. Our procedure produced non-immunogenic, transparent stromas with conserved ultrastructure compatible with long-term conservation.
journal_name
Cell Tissue Bankjournal_title
Cell and tissue bankingauthors
Rovere MR,Ouilhon C,Salmon D,Haftek M,Damour O,Auxenfans Cdoi
10.1007/s10561-018-9742-xsubject
Has Abstractpub_date
2019-03-01 00:00:00pages
49-59issue
1eissn
1389-9333issn
1573-6814pii
10.1007/s10561-018-9742-xjournal_volume
20pub_type
杂志文章abstract::Good manufacturing practices guidelines require safer and standardized cell substrates especially for those cell therapy products to treat ocular diseases where fibroblasts are used as feeder layers. However, if these are unavailable for stem cells culturing, murine fibroblasts are regularly used, raising critical iss...
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