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Serotonin, GnRH-A, and dopamine interaction in the control of in vivo luteinizing hormone release in Prussian carp (Carassius gibelio Bloch) at the time of gonad recrudescence

Author

Listed:
  • M. Sokolowska-Mikolajczyk

    (Department of Ichthyobiology and Fisheries, University of Agriculture, Krakow-Mydlniki, Poland)

  • D. Gajdzinski

    (Department of Ichthyobiology and Fisheries, University of Agriculture, Krakow-Mydlniki, Poland)

  • G. Gosiewski

    (Department of Ichthyobiology and Fisheries, University of Agriculture, Krakow-Mydlniki, Poland)

  • M. Socha

    (Department of Ichthyobiology and Fisheries, University of Agriculture, Krakow-Mydlniki, Poland)

Abstract

The effects of serotonin (5-HT), GnRH analogue (D-Ala6 LHRH, GnRH-A) and dopamine antagonist - pimozide (PIM), on luteinizing hormone (LH) release in mature Prussian carp female (Carassius gibelio Bloch) were examined at the time of gonad recrudescence. Fish were intraperitoneally injected with 5-HT (10 mg/kg), GnRH-A (20 μg/kg) or PIM (5 mg/kg) or the combinations: 5-HT+GnRH-A, 5-HT+PIM, 5-HT+GnRH-A+PIM. Before the injection and 3, 6, 12 or 24 h after treatment blood samples were collected for LH levels determination by ELISA method. The analysis of LH concentrations, expressed as the percentage of pre-treatment, showed that serotonin alone had no influence on the spontaneous LH release, however the additive effects of serotonin and GnRH-A was observed. Serotonin potentiated the GnRH-A-stimulated LH release and potentiated also the effect of PIM. Extremely strong response to PIM and also to the combination with GnRH-A masked the participation of serotonin in the process of LH release in fish with recrudescing gonads. The interaction of serotonin GnRH-A and PIM in the control of LH release is discussed.

Suggested Citation

  • M. Sokolowska-Mikolajczyk & D. Gajdzinski & G. Gosiewski & M. Socha, 2015. "Serotonin, GnRH-A, and dopamine interaction in the control of in vivo luteinizing hormone release in Prussian carp (Carassius gibelio Bloch) at the time of gonad recrudescence," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 60(2), pages 45-51.
    • Handle: RePEc:caa:jnlcjs:v:60:y:2015:i:2:id:7973-cjas
    DOI: 10.17221/7973-CJAS
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