Rapid assessment of internodal myelin integrity in central nervous system tissue

Kirschner, Daniel A; Avila, Robin L; Gamez Sazo, Rodolfo E; Luoma, Adrienne; Enzmann, Gaby U; Agrawal, Deepika; Inouye, Hideyo; Bunge, Mary Bartlett; Kocsis, Jeffery; Peters, Alan; Whittemore, Scott R (2010). Rapid assessment of internodal myelin integrity in central nervous system tissue. Journal of neuroscience research, 88(4), pp. 712-21. New York, N.Y.: Wiley-Liss 10.1002/jnr.22241

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Monitoring pathology/regeneration in experimental models of de-/remyelination requires an accurate measure not only of functional changes but also of the amount of myelin. We tested whether X-ray diffraction (XRD), which measures periodicity in unfixed myelin, can assess the structural integrity of myelin in fixed tissue. From laboratories involved in spinal cord injury research and in studying the aging primate brain, we solicited "blind" samples and used an electronic detector to record rapidly the diffraction patterns (30 min each pattern) from them. We assessed myelin integrity by measuring its periodicity and relative amount. Fixation of tissue itself introduced +/-10% variation in periodicity and +/-40% variation in relative amount of myelin. For samples having the most native-like periods, the relative amounts of myelin detected allowed distinctions to be made between normal and demyelinating segments, between motor and sensory tracts within the spinal cord, and between aged and young primate CNS. Different periodicities also allowed distinctions to be made between samples from spinal cord and nerve roots and between well-fixed and poorly fixed samples. Our findings suggest that, in addition to evaluating the effectiveness of different fixatives, XRD could also be used as a robust and rapid technique for quantitating the relative amount of myelin among spinal cords and other CNS tissue samples from experimental models of de- and remyelination.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Pre-clinic Human Medicine > Theodor Kocher Institute

UniBE Contributor:

Enzmann, Gaby








Factscience Import

Date Deposited:

04 Oct 2013 14:11

Last Modified:

04 May 2014 23:05

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https://boris.unibe.ch/id/eprint/2159 (FactScience: 204415)

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