Produção Nacional
Revisado por pares
Differential gene expression pattern and plasma sex steroids during testicular development in Genyatremus luteus (Perciforme: Haemulidae) (Bloch, 1790)
2022; Instituto Internacional de Ecologia (Brazil); Volume: 82; Linguagem: Inglês
10.1590/1519-6984.262017
ISSN1678-4375
AutoresDiego Luiz dos Santos Ribeiro, Larissa S.S. Ribeiro, Nancyleni Pinto Chaves Bezerra, João Mandú da Silva, Katherine Saldanha Noleto, Fernando Almeida-Souza, Alcina Vieira de Carvalho Neta, Zafira da Silva de Almeida, Daniel Praseres Chaves, José Ribamar de Souza Torres-Júnior,
Tópico(s)Aquaculture Nutrition and Growth
ResumoThe aim of the current study is to evaluate gene expression patterns of LH (lhr) and estrogen (er) receptors and plasma steroid levels during testicular development in Genyatremus luteus. Males were histologically classified as immature (n=7), maturing (n=7) and mature (n=7), based on the cellular structure of their testes. Plasma 11-KT concentration recorded peak at the final maturation stage. The highest plasma 17α-OHP concentrations were observed at the immature stage; they decreased at the maturation and mature stages. On the other hand, 17β-estradiol (E2) recorded higher concentrations at the maturation stage. Er expression has significantly increased along the maturational development of animals' testes. The mRNA observed for the LH receptor has decreased from immature to maturing stage; it presented expression peak at the mature stage. There was high association between receptor gene expression and plasma steroid levels, mainly E2. The current study was the first to feature different reproductive maturation stages in male G. luteus specimens, based on cellular, endocrine and molecular aspects. In addition, it has shown that the gene expression profile for er and lhr receptors, as well as plasma 11-KT and E2 concentrations, are directly linked to testicular maturation, although they are not necessarily associated with the gonadosomatic index.
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