MicroRNA-29b and RAX in Diabetic Retinopathy
Author Information
Author(s): Silva Viviane A. O., Polesskaya Anna, Sousa Thaís A., Corrêa Vani M. A., André Nayara Delgado, Reis Rosana I., Kettelhut Isis C., Harel-Bellan Annick, De Lucca Fernando L.
Primary Institution: Department of Biochemistry and Immunology, School of Medicine University of São Paulo, Ribeirão Preto, São Paulo, Brazil
Hypothesis
MicroRNA-29b could regulate genes in the pro-apoptotic pathways involved in the apoptosis of retinal neurons in STZ-induced diabetic rats.
Conclusion
RAX expression may be indirectly regulated by miR-29b, suggesting a protective effect against retinal neuron apoptosis in diabetic conditions.
Supporting Evidence
- miR-29b is upregulated more than threefold at 28 and 35 days after STZ injection.
- RAX protein is upregulated more than twofold at 3, 6, 16, and 22 days and downregulated at 35 days.
- RAX and miR-29b are localized in retinal ganglion cells and the inner nuclear layer.
Takeaway
This study looks at how a tiny molecule called microRNA-29b might help protect eye cells from dying in diabetic rats.
Methodology
Retinas from normal and diabetic rats were analyzed for miR-29b and RAX expression using qRT-PCR, immunofluorescence, and luciferase assays.
Limitations
The study did not confirm RAX as a direct target of miR-29b.
Participant Demographics
Male Wistar rats weighing 130 to 150 g.
Statistical Information
P-Value
p=0.01, p=0.05, p=0.04, p=0.004, p=0.001
Statistical Significance
p<0.05
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