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Effects of serotonin and fluoxetine on blood glucose regulation in two decapod species
Santos, E. A; Keller, R; Rodriguez, E; Lopez, L.
  • Santos, E. A; Fundação Universidade do Rio Grande, Rio Grande. Departamento de Ciências Fisiológicas. Laboratório de Zoofisiologia. Rio Grande. BR
  • Keller, R; Rheinische Friedrich-Wilhelms-Universität. Institut für Zoophysiologie. Bonn. DE
  • Rodriguez, E; Universidad de Buenos Aires. Laboratório de Fisiologia Animal. Buenos Aires. AR
  • Lopez, L; Universidad de Buenos Aires. Laboratório de Fisiologia Animal. Buenos Aires. AR
Braz. j. med. biol. res ; 34(1): 75-80, Jan. 2001. tab
Article in English | LILACS | ID: lil-277059
RESUMO
One of the best known crustacean hormones is the crustacean hyperglycemic hormone (CHH). However, the mechanisms involved in hormone release in these animals are poorly understood, and thus constitute the central objective of the present study. Different groups of crustaceans belonging to diverse taxa (Chasmagnathus granulata, a grapsid crab and Orconectes limosus, an astacid) were injected with serotonin, fluoxetine, or a mixture of both, and glycemic values (C. granulata and O. limosus) and CHH levels (O. limosus) were determined after 2 h in either submerged animals or animals exposed to atmospheric air. Both serotonin and fluoxetine caused significant hyperglycemia (P<0.05) after injection into the blood sinus of the two species, an effect enhanced after exposure to atmospheric air. In C. granulata blood glucose increased from 6.1 to 43.3 and 11.4 mg/100 ml in submerged animals and from 5.7 to 55.2 and 22.5 mg/100 ml in air-exposed animals after treatment with serotonin and fluoxetine, respectively. In O. limosus the increases were from 1.2 to 59.7 and 135.2 mg/100 ml in submerged animals and from 2.5 to 200.3 and 193.6 mg/100 ml in air-exposed animals after treatment with serotonin and fluoxetine, respectively. Serotonin and fluoxetine also caused a significant increase in the circulating levels of CHH in O. limosus, from 11.9 to 43 and 45.7 fmol/ml in submerged animals and from 13.2 to 32.6 and 45.7 fmol/ml in air-exposed animals, respectively, thus confirming their action as neuroregulators in these invertebrates
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: Blood Glucose / Serotonin / Fluoxetine / Free Radical Scavengers / Selective Serotonin Reuptake Inhibitors / Crustacea Limits: Animals Language: English Journal: Braz. j. med. biol. res Journal subject: Biology / Medicine Year: 2001 Type: Article / Project document Affiliation country: Argentina / Brazil / Germany Institution/Affiliation country: Fundação Universidade do Rio Grande, Rio Grande/BR / Rheinische Friedrich-Wilhelms-Universität/DE / Universidad de Buenos Aires/AR

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Full text: Available Index: LILACS (Americas) Main subject: Blood Glucose / Serotonin / Fluoxetine / Free Radical Scavengers / Selective Serotonin Reuptake Inhibitors / Crustacea Limits: Animals Language: English Journal: Braz. j. med. biol. res Journal subject: Biology / Medicine Year: 2001 Type: Article / Project document Affiliation country: Argentina / Brazil / Germany Institution/Affiliation country: Fundação Universidade do Rio Grande, Rio Grande/BR / Rheinische Friedrich-Wilhelms-Universität/DE / Universidad de Buenos Aires/AR