Brain mapping of three somatostatin encoding genes in the goldfish.
In the present study the brain distribution of three somatostatin (SRIF)-encoding genes, PSS-I, PSS-II, and PSS-III, was analyzed by in situ hybridization (ISH) in the goldfish. The PSS-I mRNA showed the widest distribution throughout the brain, whereas PSS-II transcripts were restricted to some hypothalamic nuclei. On the other hand, PSS-III presents an intermediate distribution pattern. All SRIF encoding genes are expressed in hypophysiotropic nuclei supporting the idea that, in addition to SRIF-14, [Pro(2)] SRIF-14, and gSRIF-28 have pituitary-controlling functions. Moreover, each of the genes is expressed in nuclei directly associated with feeding behavior, suggesting a role for SRIF peptides in the central control of food intake and energy balance. Alternatively, they might have a role in processing sensory information related with feeding behavior, since PSS genes are expressed in the main gustatory, olfactory, and visual centers, which project to the hypothalamic feeding center in teleost fish.
Canosa
Luis Fabián
LF
Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada.
Cerdá-Reverter
José Miguel
JM
Peter
Richard Ector
RE
D000818:Animals; D001921:Brain / Q000033:anatomy & histology / Q000378:metabolism*; D001923:Brain Chemistry; D001931:Brain Mapping; D006054:Goldfish; D017403:In Situ Hybridization / Q000379:methods; D011498:Protein Precursors / Q000235:genetics / Q000378:metabolism*; D012815:Signal Processing, Computer-Assisted; D013004:Somatostatin / Q000235:genetics / Q000378:metabolism*
D011498:Protein Precursors; D013004:Somatostatin