[Effects of nutritional intervention on brain functions and its related biochemical indexes in mice exposed to high +Gy].
OBJECTIVE
To study the effects of nutritional intervention on changes of monoamines in rats brain, certain amino acids in rats serum and maze behaviors caused by high +Gy exposure.


METHODS
The mice were arranged into control group (Group A), +Gy group (Group B) and +Gy nutritional intervention group (group C). Group A was not exposed to +Gy. Both Group B and group C were exposed to +10 Gy for 8 min. Three hours before +Gy exposure distilled water was given to mice in group B by gavage. The day before exposure pyridoxal fortified water was given and 3 h before exposure mixed amino acids solution were given by gavage to group C. Maze test scores were recorded for all groups. After the maze test was completed, blood was collected through the eyes for serum amino acids and brain tissue was collected by decollation for monoamines and gamma-glutamyl transferase (GGT) activity determinations.


RESULTS
After +Gy exposure maze test scores and brain NE concentrations decreased and abnormal behaviors were found. While other monoamine transmitters increased significantly. In group C maze behaviors improved and biochemical changes induced by +Gy exposure alleviated.


CONCLUSIONS
High +Gy exposure can induce changes of neural transmitters coming from nutritional metabolites in central nervous system. As a result, brain functions are affected. Nutritional intervention can alleviate this negative effect to some extent.
Institute of Aviation Medicine, The Air Force, Beijing, China.
Yan-bin
YB
Jin
Chang-lin
CL
Yang
Hong
H
Yu
Jie
J
Cheng
Chang-rong
CR
Yi
Hao
H
Zhan
D000596:Amino Acids / Q000008:administration & dosage; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects / Q000502:physiology; D015306:Biogenic Monoamines / Q000378:metabolism*; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D019587:Dietary Supplements; D018471:Hypergravity; D018782:Maze Learning / Q000187:drug effects / Q000502:physiology*; D051379:Mice; D009638:Norepinephrine / Q000378:metabolism; D011730:Pyridoxal / Q000008:administration & dosage
D000596:Amino Acids; D015306:Biogenic Monoamines; D011730:Pyridoxal; D009638:Norepinephrine