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• W2912772031 endingPage "109" @default.
• W2912772031 startingPage "101" @default.
• W2912772031 abstract "Both endocannabinoids and insulin regulate peripheral and cerebral glucose homeostasis via convergent signaling pathways that are impacted by diabetes. Here we asked how glucose metabolism and important facets of insulin signaling are affected in the forebrain of cannabinoid CB1 receptor knockout mice (CB1R-KO) and their wild-type (WT) littermates, seven weeks after the induction of insulinopenia/hyperglycemia (diabetes) with intraperitoneal streptozotocin injection. Sham-injected animals served as control. Diabetes caused milder weight loss in the WT mice compared to the phenotypically ˜11% leaner CB1R-KO, while hyperglycemia was similar. Resting [3H]deoxyglucose uptake was significantly reduced by ˜20% in acute ex vivo frontocortical and hippocampal slices obtained from both the sham-injected CB1R-KO and the diabetic WT mice. Surprisingly, the third cohort, the diabetic CB1R-KO showed no further impairment in glucose uptake, as compared to the sham-injected CB1R-KO. Depolarization-induced [3H]deoxyglucose uptake was proportional to the respective resting values only in the cortex in all four cohorts. The dissipative metabolism of [14C]-U-glucose remained largely unaffected in all cohorts of animals. However, diabetes reduced cortical CB1R density by ˜20%, as assessed by Western blotting. Albeit the changes in insulin signaling did not reflect the glucose uptake profile in each cohort, there were significant interactions between diabetes and genotype. In conclusion, a chronic decrease or lack of CB1R expression reduces glucose uptake in the mouse brain. Additionally, diabetes failed to cause further impairment in cerebral glucose uptake in the CB1R-KO. These suggest that diabetic encephalopathy may be in part associated with lower CB1R expression." @default.
• W2912772031 created "2019-02-21" @default.
• W2912772031 creator A5022431389 @default.
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• W2912772031 creator A5078143491 @default.
• W2912772031 date "2019-04-01" @default.
• W2912772031 modified "2023-10-18" @default.
• W2912772031 title "Chronic insulinopenia/hyperglycemia decreases cannabinoid CB1 receptor density and impairs glucose uptake in the mouse forebrain" @default.
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• W2912772031 doi "https://doi.org/10.1016/j.brainresbull.2019.01.024" @default.
• W2912772031 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6420377" @default.
• W2912772031 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30721768" @default.
• W2912772031 hasPublicationYear "2019" @default.
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