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Corneal Tissue Engineering: An In Vitro Model of the Stromal-nerve Interactions of the Human Cornea
Published on: January 24, 2018
Novel in Vitro Model for Keratoconus Disease
Dimitrios Karamichos1, Ramin Zareian, Xiaoqing Guo
1Schepens Eye Research Institute/Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA 02114, USA.
Journal of Functional Biomaterials
|July 27, 2013
Summary
Researchers developed a novel 3D model using human corneal fibroblasts to study keratoconus. This innovative in vitro model mimics the disease, offering a breakthrough for understanding its progression and developing new treatments for vision loss.
Area of Science:
- Ophthalmology
- Tissue Engineering
- Biomaterials Science
Background:
- Keratoconus is a progressive corneal disease causing vision loss due to structural thinning.
- Current treatments are limited to corrective lenses and surgery, with no established in vitro models.
- Understanding keratoconus progression requires advanced research models.
Purpose of the Study:
- To develop and validate a novel 3D in vitro tissue-engineered model for studying keratoconus.
- To compare extracellular matrix (ECM) component expression and secretion between normal human corneal fibroblasts (HCFs) and human keratoconus fibroblasts (HKCs).
- To investigate the effects of TGF-β1 and TGF-β3 on ECM production and cellular behavior in the keratoconus model.
Main Methods:
- Human corneal fibroblasts (HCFs) and human keratoconus fibroblasts (HKCs) were cultured in a 3D model.
- Cells were stimulated with Vitamin C (VitC) ± TGF-β1 (T1) or TGF-β3 (T3) for four weeks.
- Expression of ECM components (collagens I, III, V) and α-smooth muscle actin (SMA) was analyzed. Fast Fourier Transform (FFT) was used to assess ECM alignment.
Main Results:
- HKC constructs showed increased thickness with T1/T3 stimulation, but HCF constructs were thicker overall.
- Both cell types produced aligned type I and V collagens, with enhanced alignment upon T3 stimulation.
- HKCs uniquely expressed high levels of scarring marker type III collagen and α-smooth muscle actin (SMA), both reduced by T3. HKCs exhibited greater ECM alignment, particularly type I collagen under T3.
Conclusions:
- The developed 3D model successfully mimics key aspects of keratoconus in vitro.
- This model provides a valuable tool for investigating keratoconus pathogenesis and evaluating potential therapeutic interventions.
- The findings highlight differential ECM remodeling and scarring marker expression in keratoconus fibroblasts, offering insights into disease mechanisms.
