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2017 ; 7
(1
): 9719
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Novel evidence for complement system activation in chick myopia and hyperopia
models: a meta-analysis of transcriptome datasets
#MMPMID28852117
Riddell N
; Crewther SG
Sci Rep
2017[Aug]; 7
(1
): 9719
PMID28852117
show ga
Myopia (short-sightedness) and hyperopia (long-sightedness) occur when the eye
grows too long or short, respectively, for its refractive power. There are
currently approximately 1.45 billion myopes worldwide and prevalence is rising
dramatically. Although high myopia significantly increases the risk of developing
a range of sight-threatening disorders, the molecular mechanisms underlying
ocular growth regulation and its relationship to these secondary complications
remain poorly understood. Thus, this study meta-analyzed transcriptome datasets
collected in the commonly used chick model of optically-induced refractive error.
Fifteen datasets (collected across five previous studies) were obtained from GEO,
preprocessed in Bioconductor, and divided into 4 conditions representing early
(?1 day) and late (>1 day) myopia and hyperopia induction. Differentially
expressed genes in each condition were then identified using Rank Product
meta-analysis. The results provide novel evidence for transcriptional activation
of the complement system during both myopia and hyperopia induction, and confirm
existing literature implicating cell signaling, mitochondrial, and structural
processes in refractive error. Further comparisons demonstrated that the
meta-analysis results also significantly improve concordance with broader omics
data types (i.e., human genetic association and animal proteomics studies)
relative to previous transcriptome studies, and show extensive similarities with
the genes linked to age-related macular degeneration, choroidal
neovascularization, and cataract.