The Administration of Cadmium for 2, 3 and 4 Months Causes a Loss of Recognition Memory, Promotes Neuronal Hypotrophy and Apoptosis in the Hippocampus of Rats

Cadmium (Cd) is a toxic metal and classified as a carcinogen whose exposure could affect the function of the central nervous system. There are studies that suggest that Cd promotes neurodegeneration in different regions of the brain, particularly in the hippocampus. It is proposed that its mechanism...

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Veröffentlicht in:Neurochemical research 2019-02, Vol.44 (2), p.485-497
Hauptverfasser: Pulido, Guadalupe, Treviño, Samuel, Brambila, Eduardo, Vazquez-Roque, Ruben, Moreno-Rodriguez, Albino, Peña Rosas, Ulises, Moran-Perales, Jose Luis, Handal Silva, Anhabella, Guevara, Jorge, Flores, Gonzalo, Diaz, Alfonso
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container_title Neurochemical research
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creator Pulido, Guadalupe
Treviño, Samuel
Brambila, Eduardo
Vazquez-Roque, Ruben
Moreno-Rodriguez, Albino
Peña Rosas, Ulises
Moran-Perales, Jose Luis
Handal Silva, Anhabella
Guevara, Jorge
Flores, Gonzalo
Diaz, Alfonso
description Cadmium (Cd) is a toxic metal and classified as a carcinogen whose exposure could affect the function of the central nervous system. There are studies that suggest that Cd promotes neurodegeneration in different regions of the brain, particularly in the hippocampus. It is proposed that its mechanism of toxicity maybe by an oxidative stress pathway, which modifies neuronal morphology and causes the death of neurons and consequently affecting cognitive tasks. However, this mechanism is not yet clear. The aim of the present work was to study the effect of Cd administration on recognition memory for 2, 3 and 4 months, neuronal morphology and immunoreactivity for caspase-3 and 9 in rat hippocampi. The results show that the administration of Cd decreased recognition memory. Likewise, it caused the dendritic morphology of the CA1, CA3 and dentate gyrus regions of the hippocampus to decrease with respect to the time of administration of this heavy metal. In addition, we observed a reduction in the density of dendritic spines as well as an increase in the immunoreactivity of caspase-3 and 9 in the same hippocampal regions of the animals treated with Cd. These results suggest that Cd affects the structure and function of the neurons of the hippocampus, which contribute to the deterioration of recognition memory. Our results suggest that the exposure to Cd represents a critical health problem, which if not addressed quickly, could cause much more serious problems in the quality of life of the human population, as well as in the environment in which they develop.
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In addition, we observed a reduction in the density of dendritic spines as well as an increase in the immunoreactivity of caspase-3 and 9 in the same hippocampal regions of the animals treated with Cd. These results suggest that Cd affects the structure and function of the neurons of the hippocampus, which contribute to the deterioration of recognition memory. 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subjects Apoptosis
Biochemistry
Biomedical and Life Sciences
Biomedicine
Brain
Cadmium
Carcinogens
Caspase
Caspase-3
Cell Biology
Cell death
Central nervous system
Cognitive ability
Cognitive tasks
Dendritic spines
Dentate gyrus
Exposure
Heavy metals
Hippocampus
Human populations
Immunoreactivity
Memory
Morphology
Neurochemistry
Neurodegeneration
Neurology
Neurons
Neurosciences
Occupational health
Original Paper
Oxidative stress
Quality of life
Recognition
Structure-function relationships
Toxicity
title The Administration of Cadmium for 2, 3 and 4 Months Causes a Loss of Recognition Memory, Promotes Neuronal Hypotrophy and Apoptosis in the Hippocampus of Rats
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