Sequence análisis of Somatolactin from Cichlasoma dimerus and its relation with MCH and GnRH systems

CÁNEPA, MAXIMILIANO; POZZI, ANDREA; CARGAGNO, ABEL; MAGGESE, M. CRISTINA; VISSIO, PAULA G.

St. Malo, Francia

Simposio; 8 th INTERNATIONAL SYMPOSIUM ON REPRODUCTIVE PHYSIOLOGY OF FISH; 2007

A B S T R A C T. - In this study we detected a clear morphological close association between MCH fibers and SL cells in thePars Intermedia. According to this finding, pituitaries incubated with MCH showed an increase of SL release in a dosedependentmanner. GnRH was used as control stimuli and showed dose dependence as well. These results propose thatMCH and GnRH play a role in the cdSL release. On the other hand, cdSL is highly related to Perciform fish and contains aN-Glycosylation site at position 121 and includes the seven characteristic cysteine residues of the mature peptide.