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Microarray data of lenses with 2ME2

ABSTRACT: The addition of 2ME2 (HIF-1 inhibitor) to rat model of galactose-induced cataract decreased opacity and therapeutic effect. Genes regulated by 2ME2 addition were identified by microarray analysis. A total of 7 samples were analyzed: samples with no cataract (Control_Day4, Control_Day6), samples with cataract (Galactose-1, Galactose-2, Galactose-3), samples with decreased lens opacity (2ME2, 2ME2-2)

ORGANISM(S): Rattus norvegicus

PROVIDER: GSE240617 | GEO | 2024/02/16

REPOSITORIES: GEO

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Expression data from Sprague Dawley rat lenses cultured for 4 days - addition of various inhibitors

Project description:We created a rat sugar cataract model and examined the effects of various inhibitors on lens clouding. Lenses were removed from 6-week-old SD rats and cultured in M199 medium containing 30 mM galactose.

2020-03-04 | GSE135000 | GEO

Microarray data of lenses with glutamate

Project description:The addition of Glutamate to the lens induced by galactose eliminated the white clouding formed and showed a therapeutic effect. Genes regulated by Glutamate addition were identified by microarray analysis. A total of seven samples were used in this analysis: two samples without galactose (control), three samples with galactose (galactose) and two samples with Glutamate (Glutamate).

2024-02-22 | GSE227475 | GEO

Expression data from lens epithelial cells (LECs) from Shumiya cataract rats (SCR) with or without cataract (Cat+ or Cat-)

Project description:The Shumiya cataract rat (SCR) is a model for hereditary cataract. Two-third of these rats develop lens opacity within 10-11-weeks. Onset of cataract is attributed to the synergetic effect of lanosterol synthase (Lss) and farnesyl-diphosphate farnesyltransferase 1 (Fdft1) mutant alleles that lead to cholesterol deficiency in the lenses, which in turn adversely affects lens biology including the growth and differentiation of lens epithelial cells (LECs). Nevertheless, the molecular events and changes in gene expression associated with the onset of lens opacity in SCR is poorly understood. Our study aimed to identify the gene expression patterns during cataract formation in SCRs, which may be responsible for cataractogenesis in SCR.

2020-07-31 | GSE152616 | GEO

Therapeutic Effect of Histone Acetyltransferase Inhibitors on Galactose-Induced Cataract in Rats

Project description:We investigated the therapeutic effects of histone acetyltransferase (HAT) inhibitors on cataracts using an ex vivo model of galactose-induced cataracts in the rat lens.Among the tested HAT inhibitors, TH1834 was the only inhibitor that could completely reverse white opacities once formed in the lens. Combination treatment with C646/CPTH2 and CBP30/CPTH2 also had therapeutic effects. To identify the genes regulated by HAT inhibitors, we conducted microarray analysis of treated and untreated cataract samples.

2022-12-11 | GSE186248 | GEO

Rat ex vivo cataract model using DNA damage inducer

Project description:By adding MMS or Bleomycin, a DNA damage inducing agent, to the removed rat lens and culturing it, opacity was formed in the lens. To investigate genes whose expression fluctuates when DNA damage is inflicted and causes lens opacity, microarray analysis was performed.

2022-08-11 | GSE194317 | GEO

Pyruvate is effective in restoring cataracts formed by galactose-induced cataract models.

Project description:The addition of Pyruvate to the lens induced by galactose eliminated the white clouding formed and showed a therapeutic effect. Genes regulated by pyruvate addition were identified by microarray analysis. A total of seven samples were used in this analysis: two samples without galactose (control), three samples with galactose (galactose) and two samples with Pyruvate (Pyruvate).

2023-11-18 | GSE223322 | GEO

Comparison of apoptosis related gene expression in p7-p14 mouse lenses

Project description:Lens development exhibits a seamless progression from embryogenesis through ageing. Lens maturation and growth proceed throughout life; lens fibre cells differentiate from lens epithelial cells at the equator of the lens, migrate inwards at the bow region and mature around pre-existing fibre cells at the centre of the lens. Lens fibre cells lose their nuclei via an apoptosis like mechanism as they mature. We therefore decided to study further the relationship of apoptosis related gene expression during vital stages of lens maturation in the mouse. This is an important question as defects in lens function and/or maturation result in clouding of the lens, or cataract, which can result in considerable visual impairment. Keywords: development/age comparison

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Dehydroalanine and Dehydrobutyrine in Aging and Cataractous Lenses

Project description:Protein post-translational modifications (PTMs) have been associated with aging and age-related diseases. PTMs are particularly impactful in long-lived proteins, such as those found in the ocular lens, because they accumulate with age. Two post-translational modifications that lead to protein-protein crosslinks in aged and cataractous lenses are dehydroalanine (DHA) and dehydrobutyrine (DHB); formed from cysteine/serine and threonine residues, respectively. The purpose of this study was to quantitate DHA and DHB in human lens proteins as a function of age and cataract status. Human lenses of various ages were divided into five donor groups: transparent lenses (18–22-year-old, 48–64-year-old, and 70–93-year-old) and cataractous human lenses of two age groups (48–64-year-old lenses, and 70–93-year-old lenses) and were subjected to proteomic analysis. Relative DHA and DHB peptide levels were quantified and compared to their non-modified peptide counterparts. For most lens proteins containing DHA or DHB, higher amounts of DHA- and DHB-modified peptides were detected in aged and cataractous lenses. DHA-containing peptides were classified into three groups based on abundance changes with age and cataract: those that (1) increased only in age-related nuclear cataract (ARNC), (2) increased in aged and cataractous lenses, and (3) decreased in aged lenses and ARNC. There was no indication that DHA or DHB levels were dependent on lens region. In most donor groups, proteins with DHA and DHB were more likely to be found among urea-insoluble proteins rather than among water- or urea-soluble proteins. DHA and DHB formation may induce structural effects that make proteins less soluble in water that leads to age-related protein insolubility and possibly aggregation and light scattering.

2023-10-12 | PXD045734 | Pride

Transcription profiling of mouse to identify strain-specific variation and the onset of gap junction mutation-induced cataractsc

Project description:Disruption of the mouse gene encoding the gap junction subunit alpha3 connexin 46 (Cx46) results in the formation of lens cataracts. The timing of the onset of this lens opacity is affected by the genetic background, i.e. the mouse strain. To elucidate the mechanism by which cataracts form in the 129Sv/Jae strain earlier than in the C57BL/6J strain, global gene expression was quantitated in the lenses of these strains. Lens cDNAs were analyzed by hybridization to DNA microarrays and with real time-PCR. Theories are proposed based on the observed higher level of expression of the stress-response genes in the C57BL/6J strain and variations in the expression levels of genes involved in protein synthesis, metabolism, catabolism and cell proliferation. How these variations in gene expression might affect the response of lens fiber cells to the increased calcium, caused by lack of alpha3Cx46, is considered. The possibility that the proteins coded by the strain-variable genes might influence the cataract-associated proteolysis of gamma-crystallin is also addressed. Experiment Overall Design: To determine differences in transcript expression between the lenses of two mouse wild type strains (129 SvJae and C57BL/6J), as well as between alpha3Cx46 KO and wild-type mice. The former comparison may lead to identification of potential candidate(s) genes that prevent (or promote) cataract formation, whereas the latter comparison may provide insights into the mechanism by which cataract formation occurs in the alpha3Cx46 KO mice. Total 8 samples were used ( two separate samples for each of the following 4 types of mice: 129SvJae wild type, 129SvJae alpha3Cx46 KO, C57BL/6J wild type and C57BL/6J alpha3Cx46 KO)

2009-05-11 | E-GEOD-5645 | biostudies-arrayexpress

Strain-specific Variation in Mouse Gene Expression and the Onset of Gap Junction Mutation-induced Cataracts

2009-05-01 | GSE5645 | GEO

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