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      Effect of Stress on the Acetylcholinesterase Activity of the Hypothalamus-Pituitary-Adrenal Axis in the Rat

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          Abstract

          Acetylcholinesterase (AchE, EC 3.1.1.7) activity was determined in cerebral cortex, hypothalamus, adenohypophysis and adrenal gland in response to acute and chronic stress. Chronic exposure of animals to cold stress (at 4 °C for 7 days) resulted in significant decline of AchE activity in all tissues studied. Similar results were obtained when animals were exposed to acute immmobilization and cold stress (at 4 °C) simultaneously. In another experiment, animals were treated with 2 mg/kg of corticosterone prior to AchE determination. Corticosterone administration resulted in a significant decline in AchE activity of the cortex, the hypothalamus and the adrenal but failed to affect the adenohypophysis AchE level. Exposing adrenalectomized animals to acute stress resulted in no significant changes in the cortex and the hypothalamus but caused a significant decline in AchE of the adenohypophysis. It was concluded from this study that corticosterone might mediate the stress effect on AchE activity.

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          Author and article information

          Journal
          HRE
          Horm Res Paediatr
          10.1159/issn.1663-2818
          Hormone Research in Paediatrics
          S. Karger AG
          1663-2818
          1663-2826
          1983
          1983
          26 November 2008
          : 17
          : 1
          : 43-48
          Affiliations
          School of Pharmacy, Florida Agricultural and Mechanical University, Tallahassee, Fla., USA
          Article
          179673 Horm Res 1983;17:43–48
          10.1159/000179673
          6840671
          © 1983 S. Karger AG, Basel

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          Pages: 6
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