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Published on: August 7, 2015
Fibrotic disorders in the eye: targets of gene therapy
Shizuya Saika1, Osamu Yamanaka, Takayoshi Sumioka
1Department of Ophthalmology, Wakayama Medical University, 811-1 Kimiidera, Wakayama 641-0012, Japan. shizuya@wakayama-med.ac.jp
Abstract:
Fibrotic diseases, e.g., cutaneous and corneal scarring, keloids, and liver and lung fibrosis, etc., are characterized by appearance of myofibroblasts, the key player of the fibrogenic reaction, and excess accumulation of extracellular matrix with resultant tissue contraction and impaired functions. Inflammatory/fibrogenic growth factors/cytokines produced by injured tissues play a pivotal role in fibrotic tissue formation. Ocular tissues are also susceptible to fibrotic diseases. In this article, the pathogenesis of such fibrotic disorders in the eye, i.e., scarring in the cornea and conjunctiva, post-cataract surgery fibrosis of the lens capsule and proliferative vitreoretinopathy are reviewed. Focus is put on the roles of myofibroblast and signals activated by the fibrogenic cytokine, transforming growth factor beta. Modulation of signal transduction molecules, e.g., Smad and mitogen-activated protein kinases, by gene transfer and other technology is beneficial and can be an important treatment regiment to overcome (prevent or treat) these diseases.
Insights
Fibrotic diseases involve myofibroblasts and excess extracellular matrix, impairing tissue function. Targeting transforming growth factor beta signaling pathways offers potential treatments for ocular fibrotic disorders.
Area of Science:
- Ophthalmology
- Pathology
- Cell Biology
Background:
- Fibrotic diseases are characterized by myofibroblasts and excessive extracellular matrix accumulation.
- These conditions lead to tissue contraction and impaired function, affecting various organs.
- Ocular tissues are susceptible to fibrotic disorders, impacting vision.
Purpose of the Study:
- To review the pathogenesis of ocular fibrotic disorders.
- To highlight the roles of myofibroblasts and transforming growth factor beta (TGF-β) in eye fibrosis.
- To explore potential therapeutic strategies targeting fibrotic signaling pathways.
Main Methods:
- Review of literature on ocular fibrotic disease pathogenesis.
- Focus on the role of myofibroblasts and TGF-β signaling.
- Discussion of therapeutic interventions, including gene transfer technologies.
Main Results:
- Myofibroblasts are central to fibrotic reactions in ocular tissues.
- Transforming growth factor beta (TGF-β) is a key cytokine activating fibrotic signaling.
- Signal transduction pathways like Smad and mitogen-activated protein kinases are implicated.
Conclusions:
- Understanding the pathogenesis of ocular fibrotic diseases is crucial for developing effective treatments.
- Modulating TGF-β signaling pathways and related molecules shows promise for preventing or treating these conditions.
- Gene transfer and other technologies offer potential therapeutic avenues for fibrotic eye diseases.
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