Publications by authors named "Oswaldo Tovar-Bohorquez"
Water temperature governs physiological functions such as growth, energy allocation, and sex determination in ectothermic species. The European sea bass (Dicentrarchus labrax) is a major species in European aquaculture, exhibiting early dimorphic growth favoring females. The species has a polygenic sex determination system that interacts with water temperature to determine an individual's sex, with two periods during development that are sensitive to temperature.
View Article and Find Full Text PDFEvidence of Alternative Splicing as a Regulatory Mechanism for Kissr2 in Pejerrey Fish.
Front Endocrinol (Lausanne)
October 2018
Article Synopsis
- Kisspeptin receptors are important G-Protein-Coupled Receptors that control the release of GnRH in vertebrates, and this study focuses on two specific receptors found in pejerrey fish.
- The researchers discovered that both receptors have complex gene structures with multiple exons and introns and identified alternative splicing variants that may affect the proteins produced.
- The study found that changes in diet, like fasting, influence the expression of one of the spliced variants in the brain, suggesting that alternative splicing could play a role in reproductive regulation in these fish.
In vertebrates, the reproduction is controlled by the brain-pituitary-gonadal (BPG) axis and kisspeptin has emerged as a key player of this axis. In this study, we analyzed changes in the expression levels of kiss1, kiss2, and their receptors, kissr2 and kissr3 during gametogenesis in the BPG axis of feral Odontesthes bonariensis. In females, levels of brain kiss1 showed an increase at final maturation (Fm), while kiss2 levels were shown to be high at primary growth (Pg) stage, with no differences in the expression of their receptors.
View Article and Find Full Text PDFKisspeptin system in pejerrey fish (Odontesthes bonariensis). Characterization and gene expression pattern during early developmental stages.
Comp Biochem Physiol A Mol Integr Physiol
February 2017
In vertebrates, kisspeptins and their receptors are known to be related to puberty onset and gonadal maturation, however, there are few studies concerning their role in early development. Here, we characterize the kisspeptin system in the pejerrey, Odontesthes bonariensis, a fish with strong temperature-dependent sex determination. We reconstructed the phylogenetic history of the two ligands (kiss1 and kiss 2) and two receptors (kissr2 and kissr3) in pejerrey in the context of recent classifications of bony fishes, determined their tissue distribution and documented the early expression pattern of these ligands and receptors.
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