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AQP4 antisense RNA 1 (AQP4-AS1)

Target
AQP4-AS1
Molecular classification
Long non-coding RNA (lncRNA), Other
01

Overview

AQP4 antisense RNA 1 (AQP4-AS1) is a long non-coding RNA transcribed from the antisense strand of the AQP4 gene on chromosome 18[4]. It does not encode a protein but functions as a regulator by modulating the expression of the AQP4 water channel, particularly in retinal Müller glial cells[1][5]. AQP4-AS1 expression is elevated under diabetic conditions and in diabetic retinopathy, where it promotes neurodegeneration and vascular dysfunction by downregulating AQP4 expression. Silencing of AQP4-AS1 in experimental models can alleviate retinal neurovascular impairment, indicating its potential as a therapeutic target in diabetic retinopathy[1][5]. In addition, certain SNPs in AQP4-AS1 are associated with breast cancer risk, suggesting its broader role in disease modulation[3].

Other names
FLJ30507C18orf16CHST9-AS1CHST9 antisense RNA 1 (non-protein coding)AQP4-AS1
02

Mechanism of action

Antisense inhibition (modifies the expression of AQP4 mRNA at the transcriptional/post-transcriptional level); RNA interference (e.g., via shRNA/siRNA targeting AQP4-AS1 for functional studies)

03

Biological functions

Regulation of gene expression (specifically AQP4 mRNA/protein)Regulation of Müller glial cell functionModulation of neurovascular unit integrityRegulation of retinal cell apoptosis and gliosis
04

Disease associations

Diabetic retinopathyBreast cancerOther neurovascular and retinal disorders (inferred from role in glial and endothelial regulation)
05

Safety considerations

Off-target effects and specificity when using RNA-targeting therapeutics (inferred from lncRNA biology, not explicitly discussed in search results)Potential impact on water homeostasis and neuronal function via indirect regulation of AQP4 expression (the key CNS water channel)[1][5]
06

Biomarkers

AQP4-AS1 expression levels (as a potential biomarker for retinal neurodegeneration and diabetic retinopathy severity[1][5])SNP rs527616 in AQP4-AS1 (associated with breast cancer risk[3])

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