Popis: |
Recently, we described the complete nucleotide sequence of γ-preprotachykinin (γ-PPT) mRNA and the deduced amino acid sequence of the precursor on the basis of molecular cloning and sequence analysis of cDNA from goldfish brain. In the present study, γ-PPT gene expression in the brain of goldfish was examined using quantitative Northern blot analysis. The results showed that the γ-PPT gene is highly but differentially expressed in the olfactory bulbs, hypothalamus, and posterior brain regions. There are sexual dimorphism and seasonal variations in γ-PPT gene expression. In addition, the postprandial changes in γ-PPT gene expression in the olfactory bulbs and hypothalamus suggest that tachykinin peptides are involved in regulation of feeding behavior in goldfish. |