MicroRNA profile of extracellular vesicles released by Müller glial cells

被引:3
作者
Lamb, William D. B. [1 ,2 ]
Eastlake, Karen [1 ,2 ]
Luis, Joshua [1 ,2 ]
Sharif, Najam A. [1 ,2 ,3 ]
Khaw, Peng T. [1 ,2 ]
Limb, G. Astrid [1 ,2 ]
机构
[1] Moorfields Eye Hosp NHS Fdn Trust, Natl Inst Hlth Res NIHR Biomed Res Ctr, London, England
[2] UCL Inst Ophthalmol, London, England
[3] Santen Inc, Dept Global Alliances & Collaborat, Global Ophthalmol Res & Dev, Emeryville, CA USA
关键词
retina; Muller glia; extracellular vesicles; microRNA; neuroprotection; RETINAL GANGLION-CELLS; MULLER GLIA; STEM-CELLS; IN-VITRO; RADIAL GLIA; REGENERATION; GENERATION; EXOSOMES; NEURONS;
D O I
10.3389/fncel.2023.1325114
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Introduction As with any other radial glia in the central nervous system, Muller glia derive from the same neuroepithelial precursors, perform similar functions, and exhibit neurogenic properties as radial glia in the brain. Muller glial cells retain progenitor-like characteristics in the adult human eye and can partially restore visual function upon intravitreal transplantation into animal models of glaucoma. Recently, it has been demonstrated that intracellular communication is possible via the secretion of nano-sized membrane-bound extracellular vesicles (EV), which contain bioactive molecules like microRNA (miRNA) and proteins that induce phenotypic changes when internalised by recipient cells.Methods We conducted high-throughput sequencing to profile the microRNA signature of EV populations secreted by Muller glia in culture and used bioinformatics tools to evaluate their potential role in the neuroprotective signalling attributed to these cells.Results Sequencing of miRNA within Muller EV suggested enrichment with species associated with stem cells such as miR-21 and miR-16, as well as with miRNA previously found to play a role in diverse Muller cell functions in the retina: miR-9, miR-125b, and the let-7 family. A total of 51 miRNAs were found to be differentially enriched in EV compared to the whole cells from which EV originated. Bioinformatics analyses also indicated that preferential enrichment of species was demonstrated to regulate genes involved in cell proliferation and survival, including PTEN, the master inhibitor of the PI3K/AKT pathway.Discussion The results suggest that the release by Muller cells of miRNA-enriched EV abundant in species that regulate anti-apoptotic signalling networks is likely to represent a significant proportion of the neuroprotective effect observed after the transplantation of these cells into animal models of retinal ganglion cell (RGC) depletion. Future studies will seek to evaluate the modulation of putative genes as well as the activation of these pathways in in vitro and in vivo models following the internalisation of Muller-EV by target retinal neurons.
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页数:15
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