Project description:Diabetic retinopathy (DR) is one of the main causes of blindness in working age populations in industrialized countries. It is estimated that close to 100 million individuals worldwide suffer from DR. Regrettably, relatively little is known of the cellular processes at play during late stages of the disease, especially concerning diabetic macular edema (DME). Streptozotocin-induced diabetic retinopathy (STZ) allows to reproduce experimentally in the mouse retina the retina vascular leakage and neuroegeneration features observed in human pathological retina with non-proliferative DR. Using agnostic and orthogonal approaches, in our work we demonstrate that in contrast to healthy retina, the STZ diabetic retina engages pathways of cell cycle arrest, resulting in cellular senescence. These findings combined with further pharmacological approaches provide mechanistic evidence supporting that targeting selectively senescent vessels in DR represents a potential treatment for high vascular permeability in DME.
Project description:Schemic retinopathies such as diabetic retinopathy (DR) and retinopathy of prematurity (ROP), are the main causes of blindness in working age and pediatric populations in industrialized countries. It is estimated that close to 100 million individuals worldwide suffer from DR and 15 million preterm infants born each year are predisposed to ROP. Regrettably, relatively little is known of the cellular processes at play during late stages of pathological angiogenesis in these diseases and consequently current standards of care target all neovascularization. Oxygen-induced retinopathy (OIR) allows to reproduce experimentally in the mouse retina the pathological features observed in human pathological retina such as ischemic avascular regions as well as epi-retinal neovascularization. Using agnostic and orthogonal approaches, in our work we demonstrate that in contrast to healthy blood vessels, pathological vessels engage pathways of cell cycle arrest, resulting in cellular senescence. These findings combined with further genetic and pharmacological approaches provide mechanistic evidence supporting that targeting selectively senescent vessels in DR represents a potential treatment for neovascular retinal disease.
Project description:To systematically evaluate the effect of embryo lysates feeding, we conducted small RNA sequencing on day 7 N2 worms treated with either embryo or day 6 worm lysates. Our findings revealed that embryo lysates affected the 21ur-6059 expression.
Project description:To systematically evaluate the effect of embryo lysates feeding, we conducted RNA sequencing (RNA-seq) on day 7 N2 worms treated with embryo lysates. Our findings revealed that embryo lysates affected the expression of genes related to fatty acid metabolism, degradation of branched-chain amino acids, and lysosome functions. Notably, worms treated with embryo lysates showed increased fatty acid degradation gene expression and decreased fatty acid elongation gene expression.
Project description:We took a global approach to identify the genome-wide transcriptome in native murine eosinophils sorted from the bone marrow of C57BL6J mice at homeostasis.