1. 1. Animals avoid diets lacking an essential amino acid, such as tryptophan (TRP), the precursor for serotonin (5-HT). 5-HT is important in the control of feeding. 2. 2. To study the effects of TRP deprivation, slugs were fed TRP-devoid (DEV) or control (COR) diets. 3. 3. Food intake was depressed in DEV, as expected, but after 2 weeks, the serontonergic metacerebral giant cell in DEV was still functional. 4. 4. Neither brain 5-HT nor plasma TRP concentration was affected. 5. 5. Compared with food-restricted animals that had reductions in most amino acids, the DEV group sustained a marked plasma amino acid imbalance.
|Original language||English (US)|
|Number of pages||7|
|Journal||Comparative Biochemistry and Physiology -- Part A: Physiology|
|State||Published - Jan 1992|
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