Abstract:
:Transforming growth factor β (TGFβ) signaling is one of the most important signaling pathways regulating cell behavior in ocular tissues. Its functions are mainly linked to tissue fibrosis and inflammatory responses in ophthalmology. In epithelial cells, however, the growth inhibitory activity of TGFβ was reported in both non-ocular and ocular tissues. Since TGFβ is a bifunctional regulator that either inhibits or stimulates cell proliferation according to the specific context, we examined the effect of inhibition of TGFβ receptor (TβR) I-mediated signaling on primary corneal epithelial cells (CECs) in serum- and feeder-free conditions. The mouse CECs were isolated from the eyeballs of 6-8 weeks old female C57BL/6 mice using dispase and trypsin separately, cultivated in defined Keratinocyte serum-free medium (KSFM) with supplements (the complete medium) without feeder layer. Cells were divided into three groups, those cultured in complete medium additionally supplemented with 10 μM SB-431542, a specific inhibitor of TβR-I, were SB-CECs; those cultured in complete medium additionally supplemented with 10 ng/ml SRI-011381, a TGF-beta signaling agonist, were SRI-CECs; those cultured in complete medium without SB-431542 or SRI-011381 were control CECs. The growth rate and morphology were analyzed by light microscopy. The identity and stemness of cells was investigated through marker staining of p63, inhibitor of differentiation 1 (ID1), cytokeratin 12 (K12), cytokeratin 14 (K14), PAX6, pSmad3, alpha smooth muscle Actin (αSMA) and E-cadherin (E-cad); Real-time quantitative (RT-PCR) analysis of p63; Western blot analysis of ID1; as well as colony forming assay, sphere forming assay, healing wound in vitro assay and air-lifting interface assay. The results showed SB-CECs subcultured steadily, achieved sustained expansion, and expanded almost thrice faster than control CECs. Expanded SB-CECs exhibited smaller and more compact morphology, up-regulated p63 and ID1, as well as better performed colony-forming capacity, sphere-forming capacity, in vitro wound healing capacity, and the capacity to stratify and differentiate on air-lifting interface. Preliminary tests on human limbal epithelial cells (HLECs) showed the same results as mouse CECs. Interestingly, the ID1 expression pattern was almost identical to p63, the typical marker for corneal epithelial stem/progenitor cell (CESC/CEPC), in cultured CECs and normal corneal sections. Since ID1 has been proven to be regulated negatively by TGFβ signaling in epithelial cells and plays a role in blocking cell differentiation, its derepression by TβR-I inhibitor could be, at least in part, the underlying cause of CESC/CEPC expansion and the synchronously up-regulated expression of p63 in SB-CECs. In conclusion, inhibition of TβR-I-mediated signaling, CESCs/CEPCs achieved efficient long-term expansion in a feeder- and serum-free condition in vitro. And derepression of ID1 could be the underlying cause. Meanwhile, ID1 could serve as a marker for CESC/CEPC. These results may advance the basic and clinical CESC/CEPC research.
journal_name
Exp Eye Resjournal_title
Experimental eye researchauthors
Hu L,Pu Q,Zhang Y,Ma Q,Li G,Li Xdoi
10.1016/j.exer.2019.03.014subject
Has Abstractpub_date
2019-05-01 00:00:00pages
44-56eissn
0014-4835issn
1096-0007pii
S0014-4835(18)30802-9journal_volume
182pub_type
杂志文章abstract::Ocular rigidity (OR) is thought to play a role in the pathogenesis of glaucoma, but the lack of reliable non-invasive measurements has been a major technical challenge. We recently developed a clinical method using optical coherence tomography time-lapse imaging and automated choroidal segmentation to measure the puls...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2019.107831
更新日期:2020-01-01 00:00:00
abstract::The study aimed to determine the variation in thickness and biomechanical properties between the different regions of the human sclera. Thickness measurements were carried out along eight meridian lines extending from the posterior pole to limbus in 36 human donor scleras aged 52-96 years. Strip specimens were extract...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2010.02.010
更新日期:2010-05-01 00:00:00
abstract::The purpose of this study was to investigate the effects of soluble VEGF on human choroidal endothelial cell (CEC) transmigration across an RPE monolayer as it relates to choroidal neovascularization in AMD. In coculture assays, ARPE-19 (ARPE) was plated on the undersides of Transwell inserts having 0.4 microm pores. ...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2005.08.021
更新日期:2006-04-01 00:00:00
abstract::Recent studies have shown that lactate coupled water flux is the underlying mechanism of the corneal endothelial pump, which is highly dependent on the presence of bicarbonate. In this study we test the hypothesis that the increased intracellular pH (pHi) caused by bicarbonate stimulates glycolytic activity and the pr...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2020.108193
更新日期:2020-10-01 00:00:00
abstract::In a previous investigation into the fate of fluorescently labelled antigen (Ag) injected into the anterior chamber (AC) of the rat eye, a large number of Ag+ cells were noted in the conventional and non-conventional aqueous humour outflow pathways together with the external limbus. The aim of this study was to invest...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2004.06.009
更新日期:2004-10-01 00:00:00
abstract::The biomechanical environment within the optic nerve head (ONH) is complex and is likely directly involved in the loss of retinal ganglion cells (RGCs) in glaucoma. Unfortunately, our understanding of this process is poor. Here we describe factors that influence ONH biomechanics, including ONH connective tissue microa...
journal_title:Experimental eye research
pub_type: 杂志文章,评审
doi:10.1016/j.exer.2017.02.005
更新日期:2017-04-01 00:00:00
abstract::Reactive nitrogen species, in particular, peroxynitrite (ONOO(-)) have been proposed to play an important role in the pathogenesis of endotoxin-induced uveitis (EIU). Tyrosine nitration by ONOO(-) has been shown in other model systems to inhibit the activity of the superoxide anion quenching enyzme, manganese superoxi...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1006/exer.2002.1141
更新日期:2002-04-01 00:00:00
abstract::Isobutylmethylxanthine (IBMX), a phosphodiesterase/adenosine receptor inhibitor, was combined with norepinephrine (nE), epinephrine (Epi) and isoproterenol, respectively, to evaluate their effect on intraocular pressure (IOP). Application of topical IBMX alone had no measurable effect on IOP. When IBMX was combined wi...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/0014-4835(91)90051-f
更新日期:1991-05-01 00:00:00
abstract::The redox homeostasis is controlled by several enzyme systems. Sulfhydryl groups in lens proteins are very sensitive to oxidative stress and can easily conjugate with nonprotein thiols (S-thiolation) to form protein-thiol mixed disulfides. We have observed an elevation of protein S-S-glutathione (PSSG) and protein-S-S...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1006/exer.1997.0464
更新日期:1998-04-01 00:00:00
abstract::The histopathological features of uveitis and retinal vasculitis in acute experimental allergic encephalomyelitis (EAE) were investigated using light and electron microscopy. Lewis rats were immunized by spinal cord homogenate, complete Freund's adjuvant and Bordetella pertussis. The eyes of rats with EAE exhibited va...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1006/exer.1993.1024
更新日期:1993-02-01 00:00:00
abstract::Ultraviolet A (UVA) light-based photoactivation of riboflavin (Rf) to induce corneal crosslinking (CXL) and mechanical stiffening is now a well-known treatment for corneal ectasia and Keratoconus that is being used in a topographically guided photorefractive intrastromal CXL (PiXL) procedure to treat low degrees of re...
journal_title:Experimental eye research
pub_type: 杂志文章,评审
doi:10.1016/j.exer.2020.108199
更新日期:2020-10-01 00:00:00
abstract::The ability of diinosine polyphosphates, diinosine triphosphate (Ip(3)I), diinosine tetraphosphate (Ip(4)I) and diinosine pentaphosphate (Ip(5)I) to modify intraocular pressure in normotensive New Zealand white rabbits was tested. Ip(5)I produced increase in intraocular pressure, while Ip(3)I and Ip(4)I produced a dec...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2012.05.011
更新日期:2012-08-01 00:00:00
abstract::The binding of monoclonal and polyclonal antibodies to glial fibrillary acidic protein (GFAP) antigenic sites in the rabbit retina was shown to be sensitive to aldehyde fixation. In chemically unfixed retina, the polyclonal anti-GFAP labeled Müller cells, astrocytes, and unidentified profiles in the outer plexiform la...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/0014-4835(90)90139-l
更新日期:1990-04-01 00:00:00
abstract::Post-translational modifications by transglutaminase may contribute to the remodeling of cellular architecture in the development of lens fiber cells, and there is evidence that the enzyme may also play a role in cataract formation. It catalyses hydrolytic deamidations as well as amide exchanges on select glutamine si...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1006/exer.1997.0463
更新日期:1998-05-01 00:00:00
abstract::Mitochondrial damage and epigenetic modifications have been implicated in the pathogenesis of Age-related Macular Degeneration (AMD). This study was designed to investigate the effects of AMD/normal mitochondria on epigenetic regulation in human transmitochondrial retinal pigment epithelial (RPE) cells in vitro. Human...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2019.107701
更新日期:2019-12-01 00:00:00
abstract::The purpose of this study was to compare younger and older mice after chronic intraocular pressure (IOP) elevation lasting up to 4 days with respect to mitochondrial density, structure, and movement, as well as axonal integrity, in an ex vivo explant model. We studied 2 transgenic mouse strains, both on a C57BL/6J bac...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2018.04.001
更新日期:2018-07-01 00:00:00
abstract::Fungal keratitis is a common disease that causes blindness. An effective animal model for fungal keratitis is essential for advancing research on this disease. Our objective is to develop a novel mouse model of Fusarium solani keratitis through the inoculation of fluorescent-labeled fungi into the cornea to facilitate...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2013.03.002
更新日期:2013-05-01 00:00:00
abstract::The aim of this study was to identify the molecular genetic cause of disease in posterior polymorphous corneal dystrophy (PPCD) probands of diverse origin and to assess the utility of massively parallel sequencing in the detection of ZEB1 mutations. We investigated a total of 12 families (five British, four Czech, one...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2019.03.002
更新日期:2019-05-01 00:00:00
abstract::The CLN2 form of neuronal ceroid lipofuscinosis is an autosomal recessively inherited lysosomal storage disease that is characterized by progressive vision loss culminating in blindness, cognitive and motor decline, neurodegeneration, and premature death. CLN2 disease results from mutations in the gene that encodes th...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2015.02.012
更新日期:2015-05-01 00:00:00
abstract::Rhegmatogenous retinal detachment is by far the most common indication for retinal surgery and a major cause of severe vision loss. Increased levels of glutamate found in the vitreous of human patients and persistent remodeling, even after reattachment, suggest substantial neurochemical, functional and anatomical chan...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2012.02.009
更新日期:2012-04-01 00:00:00
abstract::Measurement of intraocular pressure (IOP) is an essential tool in monitoring glaucoma. Single IOP assessments during clinical routine examinations represent punctual values and are not able to identify IOP fluctuations and spikes. Telemetric IOP measurements are able to monitor IOP during the day and night, and are lo...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2017.10.020
更新日期:2018-01-01 00:00:00
abstract::Racemisation of amino acids is one of the most abundant modifications in long-lived proteins. In this study racemisation of Asp 58 in the small heat shock protein, αA crystallin, was investigated. In normal human lenses, levels of l-isoAsp, d-isoAsp and d-Asp increased with age, such that by age 70 they accounted for ...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2012.10.013
更新日期:2013-01-01 00:00:00
abstract::A substantial change in the glycoconjugates of the rat interphotoreceptor matrix (IPM) has recently been shown to occur between post-natal day (P) 14 and P16 in rat retinas using lectin histochemistry. This suggests that the sialic acid content on the terminus of N-glycoside linked carbohydrate chains of the IPM incre...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1006/exer.1993.1013
更新日期:1993-01-01 00:00:00
abstract::Recent studies indicate a key role of Mitf (microphthalmia-associated transcription factor) in the differentiation of the retinal pigment epithelium (RPE). To explore transdifferentiation processes, we used small interfering RNA (siRNA) targeting Mitf. Transfection of embryonic chick RPE cells with a non-silencing flu...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2005.01.004
更新日期:2005-07-01 00:00:00
abstract::The levels of alpha 1-proteinase inhibitor (alpha 1-antitrypsin) in keratoconus, normal human, and other diseased corneas were examined. Using an immunoperoxidase technique, the presence of this inhibitor was demonstrated in the epithelium, stroma and endothelium of all corneal sections. Compared with normal human con...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/0014-4835(90)90044-u
更新日期:1990-05-01 00:00:00
abstract::The genetically encoded green fluorescent protein-based calcium sensor, GCaMP, has been used to detect calcium transients and report neuronal activity. We evaluated the specificity of GCaMP3 expression to retinal ganglion cells (RGCs) of the transgenic Thy1-GCaMP3 mouse line in healthy control animals and in those aft...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/j.exer.2020.108297
更新日期:2021-01-01 00:00:00
abstract::The causal mechanism of light damage in the albino rat retina has been investigated. Male and female albino Wistar rats weighing 200-300 g and previously maintained in normal room lighting of approximately 15 hr light (0.85 +/- 0.05 X 10(-4) W cm-2) per 9 hr dark cycle were simultaneously exposed continuously to unifo...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/0014-4835(86)90012-6
更新日期:1986-01-01 00:00:00
abstract::This study tested the hypothesis that the beta-adrenergic antagonists betaxolol and timolol, cause retinal arteriolar vasodilatation in addition to their ability to reduce intraocular pressure (IOP), and compared their vasodilatory ability with that of a known Ca2+ channel entry blocker nimodipine in donor human and p...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1006/exer.1998.0495
更新日期:1998-07-01 00:00:00
abstract::Intravitreal cidofovir has been shown to be a long acting and highly efficacious treatment for CMV retinitis; however decrease in IOP is an adverse effect. We wanted to determine the effect of cidofovir on intraocular pressure (IOP) in the guinea pig, and rabbit eye to develop an animal model of cidofovir induced ocul...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1006/exer.1996.0273
更新日期:1997-05-01 00:00:00
abstract::The mechanical, histological and pharmacological properties of the isolated cat ophthalmociliary artery are reported and compared for passively stretched ring segments from three locations on the artery. Ring segments were mounted in a modified myograph system after the method of Hogestatt, Andersson and Edvinsson (19...
journal_title:Experimental eye research
pub_type: 杂志文章
doi:10.1016/0014-4835(92)90047-v
更新日期:1992-03-01 00:00:00