Diffusion tensor imaging identifies aspects of therapeutic estrogen receptor β ligand-induced remyelination in a mouse model of multiple sclerosis

Neurobiology of Disease

Seema K. Tiwari-Woodruff¹  John A. Katzenellenbogen²  Sung Hoon Kim²  Neil G. Harris³  Kelley C. Atkinson⁴  Joselyn Soto⁴  Jonathan P.C. Hasselmann⁴  Alyson Drew⁵  Jeong Bin Lee⁵  Andre Obenaus⁵ 

[1] Department of Pediatrics, School of Medicine at UCI, Irvine, CA, USA;Department of Chemistry, University of Illinois at Urbana-Champaign, IL, USA;Department of Neurosurgery, School of Medicine at UCLA, Los Angeles, CA, USA;Division of Biomedical Sciences, School of Medicine at UCR, Riverside, CA, USA;Division of Physiology, School of Medicine at Loma Linda University, Loma Linda, CA, USA;

关键词: Cuprizone diet;    Demyelination;    Neurodegeneration;    Estrogen;    Neuroprotection;    Oligodendrocyte;   

DOI  :  

来源: DOAJ

【 摘 要 】

Diffusion tensor imaging (DTI) has been shown to detect white matter degeneration in multiple sclerosis (MS), a neurodegenerative autoimmune disease that presents with diffuse demyelination of the central nervous system. However, the utility of DTI in evaluating therapeutic remyelination has not yet been well-established. Here, we assessed the ability of DTI to distinguish between remyelination and neuroprotection following estrogen receptor β ligand (Indazole chloride, IndCl) treatment, which has been previously shown to stimulate functional remyelination, in the cuprizone (CPZ) diet mouse model of MS. Adult C57BL/6 J male and female mice received a normal diet (control), demyelination-inducing CPZ diet (9wkDM), or CPZ diet followed by two weeks of a normal diet (i.e., remyelination period) with either IndCl (RM + IndCl) or vehicle (RM + Veh) injections. We evaluated tissue microstructure of the corpus callosum utilizing in vivo and ex vivo DTI and immunohistochemistry (IHC) for validation. Compared to control mice, the 9wkDM group showed decreased fractional anisotropy (FA), increased radial diffusivity (RD), and no changes in axial diffusivity (AD) both in vivo and ex vivo. Meanwhile, RM + IndCl groups showed increased FA and decreased RD ex vivo compared to the RM + Veh group, in accordance with the evidence of remyelination by IHC. In conclusion, the DTI technology used in the present study can identify some changes in myelination and is a valuable translational tool for evaluating MS pathophysiology and therapeutic efficacy.

【 授权许可】

Unknown