Increased oxidation, glycoxidation, and lipoxidation of brain proteins in prion disease.

@article{citeulike:3134611, abstract = {The basic molecular underpinnings of the pathological changes that unfold in prion disease remain elusive. A key role of increased oxidative stress has been hypothesized. Given the transient nature of most intermediate molecules implicated, increased oxidative stress is better assessed by quantitating the damage it causes to macromolecules. We used mass spectrometry-based methods to measure specific products of protein oxidation, glycoxidation, and lipoxidation in brains from patients suffering from Creutzfeldt-Jakob disease and Syrian hamsters affected by scrapie. In both cases, increased amounts of glutamic and aminoadipic semialdehydes, products of metal-catalyzed oxidation, malondialdehydelysine (a product of lipoxidation), N-varepsilon-carboxyethyllysine (a product of glycoxidation), and N-varepsilon-carboxymethyllysine (generated by lipoxidation and glycoxidation) were measured. PrP(Sc), the infectious isoform of the prion protein that accumulates in prion disease, was itself shown to be a target of increased oxidative modification. These changes were accompanied by alterations in fatty acid composition and increased phosphorylation of ERK(1/2) and p38, protein kinases known to respond to increased flows of ROS. These data support an important role of oxidative damage in the pathology of prion disease.}, address = {Metabolic Pathophysiology Research Group, Departament de Medicina Experimental, Universitat de Lleida-IRBLLEIDA, Lleida 25008, Catalonia, Spain.}, author = {Pamplona, Reinald and Naud\'{i}, Alba and Gav\'{i}n, Rosalina and Pastrana, Miguel A A. and Sajnani, Gustavo and Ilieva, Ekaterina V V. and Del R\'{i}o, Jos\'{e} Antonio A. and Portero-Ot\'{i}n, Manuel and Ferrer, Isidre and Requena, Jes\'{u}s R R. }, citeulike-article-id = {3134611}, doi = {http://dx.doi.org/10.1016/j.freeradbiomed.2008.07.009}, issn = {0891-5849}, journal = {Free radical biology \& medicine}, keywords = {prion\_diseases, prions, protein}, month = {July}, posted-at = {2008-08-19 01:42:47}, priority = {2}, title = {Increased oxidation, glycoxidation, and lipoxidation of brain proteins in prion disease.}, url = {http://dx.doi.org/10.1016/j.freeradbiomed.2008.07.009}, year = {2008} }

TY - JOUR ID - citeulike:3134611 L3 - citeulike-article-id:3134611 N2 - The basic molecular underpinnings of the pathological changes that unfold in prion disease remain elusive. A key role of increased oxidative stress has been hypothesized. Given the transient nature of most intermediate molecules implicated, increased oxidative stress is better assessed by quantitating the damage it causes to macromolecules. We used mass spectrometry-based methods to measure specific products of protein oxidation, glycoxidation, and lipoxidation in brains from patients suffering from Creutzfeldt-Jakob disease and Syrian hamsters affected by scrapie. In both cases, increased amounts of glutamic and aminoadipic semialdehydes, products of metal-catalyzed oxidation, malondialdehydelysine (a product of lipoxidation), N-varepsilon-carboxyethyllysine (a product of glycoxidation), and N-varepsilon-carboxymethyllysine (generated by lipoxidation and glycoxidation) were measured. PrP(Sc), the infectious isoform of the prion protein that accumulates in prion disease, was itself shown to be a target of increased oxidative modification. These changes were accompanied by alterations in fatty acid composition and increased phosphorylation of ERK(1/2) and p38, protein kinases known to respond to increased flows of ROS. These data support an important role of oxidative damage in the pathology of prion disease. JF - Free radical biology & medicine SN - 0891-5849 AD - Metabolic Pathophysiology Research Group, Departament de Medicina Experimental, Universitat de Lleida-IRBLLEIDA, Lleida 25008, Catalonia, Spain. TI - Increased oxidation, glycoxidation, and lipoxidation of brain proteins in prion disease. KW - prion_diseases KW - prions KW - protein AU - Pamplona, Reinald AU - Naudí, Alba AU - Gavín, Rosalina AU - Pastrana, Miguel A AU - Sajnani, Gustavo AU - Ilieva, Ekaterina V AU - Del Río, José Antonio AU - Portero-Otín, Manuel AU - Ferrer, Isidre AU - Requena, Jesús R PY - 2008/07/23/ UR - http://dx.doi.org/10.1016/j.freeradbiomed.2008.07.009 ER -