Electrospun nanofibrous scaffolds and corneal tissue engineering

2014 ◽  
Vol 92 ◽  
pp. 0-0
Author(s):  
S SALEHI ◽  
T BAHNERS ◽  
J GUTMANN ◽  
T FUCHSLUGER
Keyword(s):  
Tissue Engineering ◽  
Corneal Tissue ◽  
Nanofibrous Scaffolds

Nanofibrous scaffolds for corneal tissue engineering

2013 ◽  
Vol 91 ◽  
pp. 0-0
Author(s):  
T FUCHSLUGER ◽  
T BAHNERS ◽  
M CZUGALA ◽  
J GUTMANN ◽  
S SALEHI
Keyword(s):  
Tissue Engineering ◽  
Corneal Tissue ◽  
Nanofibrous Scaffolds

scholarly journals Examining the Transmission of Visible Light through Electrospun Nanofibrous PCL Scaffolds for Corneal Tissue Engineering

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3191
Author(s):  
Marcus Himmler ◽  
Dirk W. Schubert ◽  
Thomas A. Fuchsluger
Keyword(s):  
Tissue Engineering ◽  
Visible Light ◽  
Light Transmission ◽  
Fiber Diameter ◽  
Surrounding Medium ◽  
Wound Dressings ◽  
Human Cornea ◽  
Corneal Tissue ◽  
Nanofibrous Scaffolds ◽  
Vis Spectroscopy

The transparency of nanofibrous scaffolds is of highest interest for potential applications like corneal wound dressings in corneal tissue engineering. In this study, we provide a detailed analysis of light transmission through electrospun polycaprolactone (PCL) scaffolds. PCL scaffolds were produced via electrospinning, with fiber diameters in the range from (35 ± 13) nm to (167 ± 35) nm. Light transmission measurements were conducted using UV–vis spectroscopy in the range of visible light and analyzed with respect to the influence of scaffold thickness, fiber diameter, and surrounding medium. Contour plots were compiled for a straightforward access to light transmission values for arbitrary scaffold thicknesses. Depending on the fiber diameter, transmission values between 15% and 75% were observed for scaffold thicknesses of 10 µm. With a decreasing fiber diameter, light transmission could be improved, as well as with matching refractive indices of fiber material and medium. For corneal tissue engineering, scaffolds should be designed as thin as possible and fabricated from polymers with a matching refractive index to that of the human cornea. Concerning fiber diameter, smaller fiber diameters should be favored for maximizing graft transparency. Finally, a novel, semi-empirical formulation of light transmission through nanofibrous scaffolds is presented.

Use of Polycaprolactone in Corneal Tissue Engineering: A Review

2021 ◽  
pp. 102402
Author(s):  
Amin Orash Mahmoud Salehi ◽  
Saeed Heidari Keshel ◽  
Farshid Sefat ◽  
Lobat Tayebi
Keyword(s):  
Tissue Engineering ◽  
Corneal Tissue

scholarly journals Significance of Crosslinking Approaches in the Development of Next Generation Hydrogels for Corneal Tissue Engineering

Pharmaceutics ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 319
Author(s):  
Promita Bhattacharjee ◽  
Mark Ahearne
Keyword(s):  
Tissue Engineering ◽  
Chemical Structure ◽  
Biochemical Properties ◽  
Corneal Tissue ◽  
Future Prospects ◽  
Chemical Additives ◽  
Injectable Hydrogels ◽  
Corneal Regeneration ◽  
Key Factor ◽  
Fuchs Endothelial Dystrophy

Medical conditions such as trachoma, keratoconus and Fuchs endothelial dystrophy can damage the cornea, leading to visual deterioration and blindness and necessitating a cornea transplant. Due to the shortage of donor corneas, hydrogels have been investigated as potential corneal replacements. A key factor that influences the physical and biochemical properties of these hydrogels is how they are crosslinked. In this paper, an overview is provided of different crosslinking techniques and crosslinking chemical additives that have been applied to hydrogels for the purposes of corneal tissue engineering, drug delivery or corneal repair. Factors that influence the success of a crosslinker are considered that include material composition, dosage, fabrication method, immunogenicity and toxicity. Different crosslinking techniques that have been used to develop injectable hydrogels for corneal regeneration are summarized. The limitations and future prospects of crosslinking strategies for use in corneal tissue engineering are discussed. It is demonstrated that the choice of crosslinking technique has a significant influence on the biocompatibility, mechanical properties and chemical structure of hydrogels that may be suitable for corneal tissue engineering and regenerative applications.

Characterization of a Novel Collagen Scaffold for Corneal Tissue Engineering

2016 ◽  
Vol 22 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Jie Zhang ◽  
Aran M.G. Sisley ◽  
Alexander J. Anderson ◽  
Andrew J. Taberner ◽  
Charles N.J. McGhee ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Collagen Scaffold ◽  
Corneal Tissue

The effect of silk gland sericin protein incorporation into electrospun polycaprolactone nanofibers on in vitro and in vivo characteristics

2015 ◽  
Vol 3 (5) ◽  
pp. 859-870 ◽  
Author(s):  
Linhao Li ◽  
Yuna Qian ◽  
Chongwen Lin ◽  
Haibin Li ◽  
Chao Jiang ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Silk Gland ◽  
Engineering Applications ◽  
Nanofibrous Scaffolds ◽  
Protein Incorporation

Silk middle gland extracted sericin protein based electrospun nanofibrous scaffolds with excellent biocompatibility have been developed for tissue engineering applications.

Genipin-crosslinked silk fibroin/hydroxybutyl chitosan nanofibrous scaffolds for tissue-engineering application

2010 ◽  
Vol 95A (3) ◽  
pp. 870-881 ◽  
Author(s):  
Kuihua Zhang ◽  
Yongfang Qian ◽  
Hongsheng Wang ◽  
Linpeng Fan ◽  
Chen Huang ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Silk Fibroin ◽  
Engineering Application ◽  
Tissue Engineering Application ◽  
Nanofibrous Scaffolds

scholarly journals High-Resolution Bioprinting of Recombinant Human Collagen Type III

Polymers ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2973
Author(s):  
Rory Gibney ◽  
Jennifer Patterson ◽  
Eleonora Ferraris
Keyword(s):  
Tissue Engineering ◽  
High Resolution ◽  
Collagen Type ◽  
Thin Layers ◽  
Corneal Tissue ◽  
Collagen Type Iii ◽  
Type Iii ◽  
Pure Collagen ◽  
Human Collagen ◽  
Visible Wavelengths

The development of commercial collagen inks for extrusion-based bioprinting has increased the amount of research on pure collagen bioprinting, i.e., collagen inks not mixed with gelatin, alginate, or other more common biomaterial inks. New printing techniques have also improved the resolution achievable with pure collagen bioprinting. However, the resultant collagen constructs still appear too weak to replicate dense collagenous tissues, such as the cornea. This work aims to demonstrate the first reported case of bioprinted recombinant collagen films with suitable optical and mechanical properties for corneal tissue engineering. The printing technology used, aerosol jet® printing (AJP), is a high-resolution printing method normally used to deposit conductive inks for electronic printing. In this work, AJP was employed to deposit recombinant human collagen type III (RHCIII) in overlapping continuous lines of 60 µm to form thin layers. Layers were repeated up to 764 times to result in a construct that was considered a few hundred microns thick when swollen. Samples were subsequently neutralised and crosslinked using EDC:NHS crosslinking. Nanoindentation and absorbance measurements were conducted, and the results show that the AJP-deposited RHCIII samples possess suitable mechanical and optical properties for corneal tissue engineering: an average effective elastic modulus of 506 ± 173 kPa and transparency ≥87% at all visible wavelengths. Circular dichroism showed that there was some loss of helicity of the collagen due to aerosolisation. SDS-PAGE and pepsin digestion were used to show that while some collagen is degraded due to aerosolisation, it remains an inaccessible substrate for pepsin cleavage.

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