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  • Title: Structural changes in brain regions involved in executive-control and self-referential processing after sleeve gastrectomy in obese patients.
    Author: Liu L, Ji G, Li G, Hu Y, Jin Q, Hu C, Zhao J, Meng Q, von Deneen KM, Chen A, Cui G, Wang H, Zhao Q, Wu K, Tian J, Shokri-Kojori E, Tomasi D, Volkow ND, Nie Y, Zhang Y, Wang GJ.
    Journal: Brain Imaging Behav; 2019 Jun; 13(3):830-840. PubMed ID: 29948904.
    Abstract:
    Obesity-related brain gray (GM) and white matter (WM) abnormalities have been reported in regions associated with food-intake control and cognitive-emotional regulation. Bariatric surgery (BS) is the most effective way to treat obesity and induce structural recovery of GM/WM density and WM integrity. It is unknown whether the surgery can promote structural changes in cortical morphometry along with weight-loss. Structural Magnetic Resonance Imaging and surface-based morphometry analysis were used to investigate BS-induced alterations of cortical morphometry in 22 obese participants who were tested before and one month post-BS, and in 21 obese controls (Ctr) without surgery who were tested twice (Baseline and One-month). Results showed that fasting plasma ghrelin, insulin, and leptin levels were significantly reduced post-BS (P < 0.001). Post-BS there were significant decreases in cortical thickness in the precuneus (PFDR < 0.05) that were associated with decreases in BMI. There were also significant increases post-BS in cortical thickness in middle (MFG) and superior (SFG) frontal gyri, superior temporal gyrus (STG), insula and ventral anterior cingulate cortex (vACC); and in cortical volume in left postcentral gyrus (PostCen) and vACC (PFDR < 0.05). Post-BS changes in SFG were associated with decreases in BMI. These findings suggest that structural changes in brain regions implicated in executive control and self-referential processing are associated with BS-induced weight-loss.
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