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Sutoo, D. et al.

Sutoo, Akiyama, Matsui,

Gastric ulcer formation in cold-stressed mice related to a central calcium-dependent-dopamine synthesizing system.

Stress ulceration of the stomach in mice was investigated from the aspect of the calcium/calmodulin-dependent dopamine synthesizing system in the brain. Cold stress was induced in mice by restraining them at 4 degrees C. Serum and brain calcium levels were increased by cold stress, and an increased brain calcium level was found to enhance dopamine synthesis and a successively increased brain dopamine level induced gastric ulcer formation. Development of gastric ulcers elicited by cold stress was significantly decreased by i.p. pretreatment with EDTA (1 micromol/mouse, 1 h before restraint) or alpha-methyltyrosine (a tyrosine hydroxylase inhibitor, 100 mg/kg, 24 h before restraint), and was further significantly increased by pretreatment with CaCl2 (40 micromol/kg, 1 h before restraint). These findings suggest that the development of gastric ulcers in cold-stressed mice may be linked with the enhancement of calcium/calmodulin-dependent catecholamine synthesis in the brain.[1]

References

Gastric ulcer formation in cold-stressed mice related to a central calcium-dependent-dopamine synthesizing system. Sutoo, D., Akiyama, K., Matsui, A. Neurosci. Lett. (1998) [Pubmed]

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