Retinal exosomes

Retinal exosomes (or retinal extracellular vesicles) refer to the biological process and therapeutic strategy involving small membrane-bound vesicles released by or targeting cells within the retina, such as the retinal pigment epithelium (RPE) and photoreceptors [1]. These exosomes serve as critical mediators of intercellular communication, transporting proteins, lipids, and various RNA species (e.g., microRNAs) that influence retinal homeostasis and disease progression [2]. In pathological conditions like age-related macular degeneration (AMD) and diabetic retinopathy, secreted exosomes can carry pro-inflammatory or pro-angiogenic signals that exacerbate tissue damage [3]. Conversely, exosomes derived from mesenchymal stem cells (MSCs) are being investigated as therapeutic agents to deliver neuroprotective and anti-inflammatory cargo to damaged retinal tissues [4]. Because this entry describes a cellular delivery mechanism and a broad biological pathway rather than a specific protein or receptor, it is not classified as a traditional molecular drug target [1, 5]. Research in this area focuses on modulating exosome secretion or utilizing them as biocompatible vehicles for targeted drug delivery to the posterior segment of the eye [2, 4]. Common markers for these vesicles include CD63, CD81, and CD9, which are used to characterize their purity and origin [5].

Other names

Retinal cells via secreted exosomesRetinal extracellular vesiclesRPE-derived exosomes

Paracrine signaling and horizontal transfer of bioactive cargo (miRNAs, proteins, lipids) to recipient retinal cells to modulate pathways involved in inflammation, apoptosis, and angiogenesis.