Type 1 Diabetes, Glucocorticoids and the Brain: a sweet connection - Revsin, Yanina
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Type 1 diabetes (T1D) can impact the integrity of the central nervous system (CNS). However the reason why T1D affects CNS integrity remains to be elucidated. The general hypothesis tested that the onset of diabetes induces first dysregulation of the hypothalamus-pituitary-adrenal (HPA) axis and subsequently hypersecretion of glucocorticoids which then renders the brain more vulnerable to metabolic insults causing damage and concomitant cognitive disturbances. Here it is demonstrated that hyperresponsiveness of the adrenal glands is the primary event leading to hypercorticism in diabetic mice.…mehr

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Produktbeschreibung
Type 1 diabetes (T1D) can impact the integrity of the central nervous system (CNS). However the reason why T1D affects CNS integrity remains to be elucidated. The general hypothesis tested that the onset of diabetes induces first dysregulation of the hypothalamus-pituitary-adrenal (HPA) axis and subsequently hypersecretion of glucocorticoids which then renders the brain more vulnerable to metabolic insults causing damage and concomitant cognitive disturbances. Here it is demonstrated that hyperresponsiveness of the adrenal glands is the primary event leading to hypercorticism in diabetic mice. Furthermore, diabetic animals present hippocampal pathology suggesting mild neurodegeneration. Concurrently, cognitive impairments related to spatial memory were found. Finally, normalization of the hippocampal dysfunction and the impaired cognition of diabetic mice were achieved using a glucocorticoid receptor (GR) antagonist. These data indicate that glucocorticoids play a causal role in diabetes neuropathology. Moreover, the GRs are crucial for the mechanism that underlies the disruption of hippocampal integrity and the impairment of cognitive performance.
Autorenporträt
Yanina Revsin was born on September 4th, 1975 in Buenos Aires, Argentina. There she graduated in biology at Buenos Aires University and worked at the Institute of Biology and Experimental Medicine from 2000 to 2003. Thereafter she accomplished her PhD at Leiden University, The Netherlands.