preview

Diabetic Synthesis Essay

Decent Essays

Diabetes mellitus is associated with lower cognitive performance and increased risk for dementia. The incidence of cognitive function was found to be declined by 40% in people with diabetes. It was reported that there is an overall 50-100% increase in the incidence of dementia in diabetic subjects ).
Examination of diabetic hippocampus sections revealed that diabetes caused marked histological alterations. Many degenerative changes were seen in pyramidal cells. Disorganization of pyramidal cells detected in CA1 region with absence of characteristic palisade arrangement. Many areas of cell loss leaving empty spaces were detected in CA3 region. The dentate gyrus showed marked disorganization, vacuolation and hemorrhage and decreased granule …show more content…

eported increased caspase 3 activity indicating neuronal and Schwann cells death in uncontrolled hyperglycemia. proved that diabetes increase the expression of Bax and caspase-3 leading to apoptosis of the pyramidal neurons in STZ induced diabetic rats.
Several possible mechanisms have been explained regarding diabetes induced neurodegeneration. Diabetes mellitus and the accompanying hyperglycemia is a chronic endogenous stressor that is accompanied with increased oxidative stress in brain, particularly the hippocampus, by accelerating free radical generation. These radicals contribute to increased neuronal degeneration by inducing oxidation to proteins, DNA alterations and lipids oxidation in cell membranes .
Another mechanism is the activated polyol pathway during hyperglycaemia consuming NADPH which is the essential cofactor for regenerating reduced glutathione. Depletion of glutathione lowers the threshold for intracellular oxidative damage.
Also, another important mechanism expected to lead to neuronal loss in diabetes mellitus could be due to lower insulin or insulin- like growth factor signaling which has a neuroprotective anti-apoptotic

Get Access