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Identification, quantification and agerelated changes of human trabecular meshwork stem cells

Eye and Vision 2019年第1期6卷 261-270页

作者： Yogapriya Sundaresan Muthukkaruppan Veerappan Krishnadas Subbiah Ramasamy Gowri Priya Chidambaranathan Department of Immunology and stem Cell Biology Aravind Medical Research FoundationMaduraiTamil NaduIndia. Glaucoma Clinic Aravind Eye Hospital and Post Graduate Institute of OphthalmologyMaduraiTamil NaduIndia

Background:Loss of cells in the human trabecular meshwork(TM)has been reported with ageing and in *** study aims to identify,quantify and determine the age-related changes of human TM stem cells(TMSCs).Methods:Isolation of TM cells/paraffin sectioning was carried out using human corneoscleral rings and whole *** TM cells/sections were immunostained for the stem cell markers ATP-binding cassette protein G2(ABCG2),nerve growth factor receptor p75 and AnkyrinG(AnkG).Images were acquired using Leica SP8 confocal *** isolated cells were analyzed for two parameters-ABCG2 expression and nucleus to cytoplasmic ratio(N/C ratio).The total number of TM cells and those positive for ABCG2 and p75 in each section were *** rank order correlation was used to determine the association between age and the cell ***:The TMSCs were identified based on two parameters-high ABCG2 expression and high N/C ratio>*** stem cells were also positive for p75 and *** TMSC content based on the two parameters was 21.0±1.4%in60 *** stem cells with high ABCG2 and p75 expression were restricted to the Schwalbe’s line region of the TM.A significant correlation was observed between the reduction in TMSC content and TM cell count during ***:The human TMSCs were identified and quantified based on two parameter *** study established a significant association between age-related reduction in TMSC content and TM cell loss.

关键词： Human trabecular meshwork trabecular meshwork stem cells Two-parameter analysis Age-related changes Primary open angle glaucoma

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