Damaging effects of advanced glycation end product in the murine macrophages cell line J774A.1.

Bassi, A.M., Ledda, S., Valentini, S., De Pascale, M.C., Rossi, S., Odetti, P. and Cottalasso, D. 2002. Damaging effects of advanced glycation end product in the murine macrophages cell line J774A.1. Toxicology In Vitro. 16 (4), pp. 339-347. doi:10.1016/S0887-2333(02)00016-4

TitleDamaging effects of advanced glycation end product in the murine macrophages cell line J774A.1.
AuthorsBassi, A.M., Ledda, S., Valentini, S., De Pascale, M.C., Rossi, S., Odetti, P. and Cottalasso, D.
Abstract

The interaction of reducing sugars, such as aldose, with proteins and the subsequent molecular rearrangements, produces irreversible advanced glycation end-products (AGEs), a heterogeneous class of non-enzymatic glycated proteins or lipids. AGEs form cross-links, trap macromolecules and release reactive oxygen intermediates. AGEs are linked to aging, and increase in several related diseases. The aim of this study was to assess, in a murine macrophage cell line, J774A.1, the effects of 48 h of exposure to glycated serum containing a known amount of pentosidine, a well-known AGE found in the plasma and tissues of diabetic and uremic subjects. Fetal bovine serum was incubated with ribose (50 mm) for 7 days at 37 °C to obtain about 10 nmol/ml of pentosidine. The cytotoxic parameters studied were cell morphology and viability by neutral red uptake, lactate dehydrogenase release and tetrazolium salt test. In the medium and in the intracellular compartment, bound and free pentosidine were evaluated by HPLC, as sensitive and specific glycative markers, and thiobarbituric acid reactive substances (TBARs), as index of the extent of lipid peroxidation. Our results confirm that macrophages are able to take up pentosidine. It is conceivable that bound pentosidine is degraded and free pentosidine is released inside the cell and then into the medium. The AGE increase in the medium was combined with an increase in TBARs, meaning that an oxidative stress occurred; marked cytotoxic effects were observed, and were followed by the release of free pentosidine and TBARs into the culture medium.

JournalToxicology In Vitro
Journal citation16 (4), pp. 339-347
ISSN0887-2333
Year2002
PublisherElsevier
Digital Object Identifier (DOI)doi:10.1016/S0887-2333(02)00016-4
Publication dates
Published16 Apr 2002

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