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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Sci+Rep 2015 ; 5 (ä): ä Nephropedia Template TP
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Synchrotron FTIR micro-spectroscopy for structural analysis of Lewy bodies in the brain of Parkinson?s disease patients #MMPMID26621077
Lewy bodies (LBs), which mainly consist of ?-synuclein (?-syn), are neuropathological hallmarks of patients with Parkinson?s disease (PD). The fine structure of LBs is unknown, and LBs cannot be made artificially. Nevertheless, many studies have described fibrillisation using recombinant ?-syn purified from E. coli. An extremely fundamental problem is whether the structure of LBs is the same as that of recombinant amyloid fibrils. Thus, we used synchrotron Fourier transform infrared micro-spectroscopy (FTIRM) to analyse the fine structure of LBs in the brain of PD patients. Our results showed a shift in the infrared spectrum that indicates abundance of a ?-sheet-rich structure in LBs. Also, 2D infrared mapping of LBs revealed that the content of the ?-sheet structure is higher in the halo than in the core, and the core contains a large amount of proteins and lipids.