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Title: Lipids status and copper in a single astrocyte of the rat model for amyotrophic lateral sclerosis: Correlative synchrotron-based X-ray and infrared imaging

Journal Article · · Journal of Biophotonics
 [1];  [2];  [3];  [2]; ORCiD logo [1]
  1. ALBA Synchrotron Light Source, Cerdanyola del Valles, Barcelona (Spain)
  2. University of Belgrade (Serbia)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease, causing death of motor neurons controlling voluntary muscles. The pathological mechanisms of the disease are only partially understood. The hSOD1-G93A ALS rat model is characterized by an overexpression of human mutated SOD1, causing increased vulnerability by forming intracellular protein aggregates, inducing excitotoxicity, affecting oxidative balance and disturbing axonal transport. In this study we followed the bio-macromolecular organic composition and compartmentalization together with trace metal distribution in situ in single astrocytes from the ALS rat model and compared them to the control astrocytes from nontransgenic littermates by simultaneous use of two synchrotron radiation-based methods: Fourier transform infrared microspectroscopy (SRFTIR) and hard X-ray fluorescence microscopy (XRF). Here we show that ALS cells contained more Cu, which colocalized with total lipids, increased carbonyl groups and oxidized lipids, thus implying direct involvement of Cu in oxidative stress of lipidic components without direct connection to protein aggregation in situ.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); ALBA; Ministry of Education, Science and Technological Development of the Republic of Serbia (MESTD RS)
Grant/Contract Number:
AC02-06CH11357; III41005
OSTI ID:
1774634
Journal Information:
Journal of Biophotonics, Vol. 13, Issue 10; ISSN 1864-063X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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