Protection of zinc on hippocampal cholecystokinin of lead-exposed rat / 中华劳动卫生职业病杂志
Chinese Journal of Industrial Hygiene and Occupational Diseases
; (12): 442-444, 2004.
Article
en Zh
| WPRIM
| ID: wpr-258713
Biblioteca responsable:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the relationship between the effects of zinc on hippocampal cholecystokinin (CCK) positive neurons and learning and memory ability of lead-exposed rats.</p><p><b>METHODS</b>Thirty-six Wistar rats were divided into control group, lead-exposed group (drunk 6.15 mmol/L of lead solution) and lead-zinc group (drunk 6.15 mmol/L of lead + 3.10 mmol/L of ZnSO(4) solution) randomly. Y-maze test was used to study learning and memory ability in rats; Atomic absorption method was used to determine serum and hippocampal lead content; ABC immunohistochemistry and quantitative graphic analysis were used to investigate the changes of CCK positive neurons in different hippocampal subfields in lead-exposed rats.</p><p><b>RESULTS</b>The learning and memory ability in lead-exposed rats were significantly lower (P < 0.05) while the serum and hippocampal lead content in lead-exposed rat were significantly higher (P < 0.05) than those in control and lead-zinc group. The number and optical density of CCK positive neurons in CA(1) and CA(3) areas of lead-exposed rats were significantly lower (P < 0.05) than those in control and lead-zinc group. No differences in these indexes between the control and lead-zinc group were found (P > 0.05).</p><p><b>CONCLUSION</b>Lead may damage the learning and memory ability and affect the number of CCK positive neurons in lead-exposed rats. Zinc might play an important role in preventing lead-induced damages.</p>
Texto completo:
1
Base de datos:
WPRIM
Asunto principal:
Farmacología
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Zinc
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Colecistoquinina
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Ratas Wistar
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Aprendizaje por Laberinto
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Toxicidad
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Hipocampo
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Plomo
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Memoria
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Metabolismo
Límite:
Animals
Idioma:
Zh
Revista:
Chinese Journal of Industrial Hygiene and Occupational Diseases
Año:
2004
Tipo del documento:
Article