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Changes in monoamine oxidase and monoamines with human development and aging
Federation Proceedings
|January 1, 1975
Summary
Aging impacts monoamine oxidase (MAO) activity and neurotransmitter levels in the brain. These changes correlate with age and may predispose individuals to neurological disorders like depression and parkinsonism.
Area of Science:
- Neuroscience
- Biochemistry
- Gerontology
Background:
- Monoamines and their metabolism are crucial for neurotransmission.
- Age-related changes in neurotransmitter systems are increasingly recognized.
- Dysregulation of monoamine pathways is implicated in various neurological disorders.
Purpose of the Study:
- To investigate the effects of aging on monoamine metabolism in human tissues.
- To determine correlations between age, monoamine oxidase (MAO) activity, and neurotransmitter concentrations.
- To explore the potential link between aging-induced monoamine alterations and clinical diseases.
Main Methods:
- Analysis of monoamine oxidase (MAO) activity in plasma, blood platelets, and various brain regions.
- Measurement of neurotransmitter concentrations, including norepinephrine, serotonin (5-HT), and 5-hydroxyindoleacetic acid (5-HIAA) in the hindbrain.
- Statistical correlation analyses between age, MAO activity, and neurotransmitter levels.
Main Results:
- MAO activity showed a significant positive correlation with age in plasma, platelets, and brain tissue.
- Hindbrain norepinephrine concentration decreased with advancing age.
- Hindbrain norepinephrine concentration negatively correlated with MAO activity, while 5-HIAA positively correlated with MAO activity.
Conclusions:
- Aging significantly affects monoamine mechanisms in the human brain.
- Age-related alterations in monoamine metabolism may predispose individuals to conditions like depression and parkinsonism.
- These findings highlight the role of aging in central nervous system homeostasis and disease development.