Maximus Peto’s Commentary
These researchers report a statistically-significant “accumulation” of the AGE pentosidine in the vitreous of the human eye with age, from 222 human vitrectomy samples. I wonder how pronounced this pentosidine accumulation is. It’s also noteworthy that there was no association found between pentosidine accumulation and gender or diabetes status.
FACTORS ASSOCIATED WITH PENTOSIDINE ACCUMULATION IN THE HUMAN VITREOUS.
Retina. 2017 Apr;37(4):770-777.
van Deemter M, Bank RA, Vehof J, Hooymans JM, Los LI
PubMed publication date (edat): 7/29/2016
To explore factors associated with pentosidine accumulation in the human vitreous.
Vitreous samples were obtained during trans pars plana vitrectomy for macular hole or rhegmatogenous retinal detachment. Patient characteristics included age, gender, and diabetes mellitus. Ocular characteristics included pseudophakia, posterior vitreous detachment, and presence of intraocular fibrosis (epiretinal membrane, proliferative vitreoretinopathy, or both). Pentosidine concentration as a measure of accumulation of advanced glycation end products was determined by high performance liquid chromatography.
Pentosidine concentrations were measured in 222 vitrectomy samples (118 female and 104 male patients [median age 66 years], treated for macular hole [n = 105] or rhegmatogenous retinal detachment [n = 117]). Pentosidine was found to accumulate significantly with age (P < 0.001). After correction for age, a multivariable linear regression model revealed significantly higher pentosidine values in eyes with intraocular fibrosis (P = 0.001), in phakic as compared with pseudophakic eyes (P = 0.02), and in the absence of a complete posterior vitreous detachment (P = 0.018). The authors found no association with diabetes mellitus or gender. CONCLUSION: This study confirmed an age-related pentosidine accumulation in the vitreous and found new factors relating to pentosidine levels. Findings support the hypothesis of enzyme-induced vitreous liquefaction and the hypothesis of pentosidine as a pro-fibrotic factor. PMID: 27465571