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[Tissue serotonin content and monoamine oxidase activity in shock]
Voprosy Meditsinskoi Khimii
|May 1, 1977
Summary
Traumatic shock significantly alters serotonin levels in rats, increasing it in organs like the brain and liver while decreasing it in the lungs and intestines. Monoamine oxidase activity also shows complex changes.
Area of Science:
- Biochemistry
- Physiology
- Pharmacology
Background:
- Traumatic shock can induce significant physiological and biochemical changes.
- Serotonin plays a crucial role in various bodily functions and its levels can be affected by stress and injury.
- Monoamine oxidase (MAO) is an enzyme responsible for degrading neurotransmitters like serotonin.
Purpose of the Study:
- To investigate the impact of traumatic shock on serotonin content in various rat tissues.
- To analyze the changes in monoamine oxidase (MAO) activity in response to traumatic shock.
Main Methods:
- Induction of traumatic shock in rats through soft tissue crushing.
- Quantification of serotonin levels in brain, liver, kidney, heart, lungs, and intestine tissues.
- Assay of monoamine oxidase (MAO) activity across different tissue types.
Main Results:
- Serotonin levels increased significantly (3-fold in brain, 8-fold in liver, 15-16-fold in kidney and heart) post-shock.
- Serotonin levels decreased notably in lungs (40%) and intestine (80%).
- MAO activity exhibited dynamic alterations: initial increase, followed by a decrease, restoration, and a persistent decline during the decompressional period.
Conclusions:
- Traumatic shock causes differential and significant alterations in tissue serotonin levels.
- MAO activity is dynamically modulated by traumatic shock, suggesting a complex regulatory response.
- These findings highlight the profound biochemical impact of severe trauma on neurotransmitter systems.