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• W2034307455 abstract "Transforming growth factor β (TGFβ) is an important cytokine in corneal development and wound healing. Transgenic mice that express an active form of human TGFβ1 driven by a lens-specific promoter were used in the current study to determine the biological effects of lens-derived TGFβ1 on postnatal corneal development and homeostasis. The postnatal corneal changes in the TGFβ1 transgenic mice were examined by fluorescein labeling and histology. Epithelial/endothelial-to-mesenchymal transition (E/EnMT) in the transgenic mouse cornea was demonstrated by immunostaining for α-smooth muscle actin (α-SMA) and cadherin-11. Expression of E- and N-cadherin in the corneal epithelial and endothelial cells, respectively, was analyzed by in situ hybridization. Among the established TGFβ1 transgenic lines, mice from line OVE853 and OVE917 had normal-sized eyeballs but developed a corneal haze after eyelid opening. Histological examination showed that prenatal corneal development appeared to be normal. However, after postnatal day 7 (P7), the corneal endothelial cells in transgenic line OVE853 began to lose normal cell–cell contact and basement membrane structure. The endothelial layer was eventually absent in the inner surface of the transgenic mouse cornea. The morphological changes in the cornea correlated with abnormal expression of α-SMA, a molecular marker of EMT, and stress fiber formation in myofibroblast-like cells, which initially appeared in the corneal endothelial layer and subsequently in the corneal epithelial and stromal layers. The E/EnMT in the transgenic mouse cornea was further demonstrated by loss of E- and N-cadherin expression in the corneal epithelial and endothelial cells, respectively, and meanwhile increasing expression of cadherin-11 in both corneal epithelium and stroma. Elevated levels of active TGFβ1 in the anterior chamber can lead to myofibroblast formation in the corneal endothelial layer and subsequently in the corneal epithelial and stromal layers. Our data suggest that the levels of biologically active TGFβ in the aqueous humor must be under tight control to maintain corneal homeostasis. TGFβ1 is the major cytokine during wound healing. Therefore, our findings also suggest a potential mechanism to explain the loss of corneal endothelial barrier and corneal opacification after intraocular surgery or trauma." @default.
• W2034307455 created "2016-06-24" @default.
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• W2034307455 date "2010-02-01" @default.
• W2034307455 modified "2023-10-14" @default.
• W2034307455 title "Induction of corneal myofibroblasts by lens-derived transforming growth factor β1 (TGFβ1): A transgenic mouse model" @default.
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• W2034307455 doi "https://doi.org/10.1016/j.brainresbull.2009.10.019" @default.
• W2034307455 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2814984" @default.
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