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  • Title: SREBF-2 polymorphism influences white matter microstructure in bipolar disorder.
    Author: Poletti S, Aggio V, Bollettini I, Falini A, Colombo C, Benedetti F.
    Journal: Psychiatry Res Neuroimaging; 2016 Nov 30; 257():39-46. PubMed ID: 27771555.
    Abstract:
    The aim of the study is to investigate if gene polymorphisms in sterol regulatory element binding protein transcriptional factors SREBF-1 and SREBF-2, which regulate lipid and cholesterol metabolism, could affect white matter (WM) microstructure, the most recognized structural biomarker of bipolar disorder (BD). In a sample of 93 patients affected by BD, we investigated the effect of SREBF-1 rs11868035, and SREBF-2 rs1052717, on WM microstructure, using diffusion tensor imaging and tract-based spatial statistics. We observed increased radial diffusivity in the rs1052717 A/A genotype compared to A/G and G/G, and reduced fractional anisotropy (FA) in the rs1052717 A/A genotype compared to G carriers in cingulum, corpus callosum, superior and inferior longitudinal fasciculi, and anterior thalamic radiation. These results seem to suggest an involvement of SREBF-2 in the integrity of white matter tracts in BD and therefore a possible role of SREBP pathway in CNS myelination processes.
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