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Characterization and Functional Analysis of the 17-Beta Hydroxysteroid Dehydrogenase 2 () Gene during Sex Reversal in the Ricefield Eel ().
Int J Mol Sci
August 2024
Integrative Science Center of Germplasm Creation in Western China (CHONGQING) Science City & College of Fisheries, Key Laboratory of Freshwater Fish Reproduction and Development Ministry of Education, Key Laboratory of Aquatic Sciences of Chongqing, Southwest University, Chongqing 402460, China.
Article Synopsis
- The enzyme 17-beta hydroxysteroid dehydrogenase 2 (Hsd17b2) plays a crucial role in regulating the effects of hormones such as estrogens and androgens, preventing hormone-related diseases in mammals.
- The research focuses on the ricefield eel, a fish that can change sex, to explore the functions of this gene in sex differentiation, revealing that its mRNA is primarily expressed in the ovaries during early development.
- The study found that hormone exposure, like 17β-estradiol and melatonin, significantly influences the mRNA expression of Hsd17b2 in the ricefield eel's ovaries, highlighting its complex role in sexual development.
Study on hormone induction of the male parent and embryonic development, gonad differentiation, and growth of "All-female No.1" .
Heliyon
July 2024
Zhejiang Institute of Freshwater Fisheries, Agriculture Ministry Key Laboratory of Healthy Freshwater Aquaculture, Key Laboratory of Freshwater Aquatic Animal Genetic and Breeding of Zhejiang Province, Huzhou, Zhejiang, 313001, China.
Article Synopsis
- Female fish grew faster than males in a study that bred a new variety called "All-female No.1" using gynogenetic female and pseudo-male parents.
- Hormone induction using low doses of 17α-methyltestosterone was ineffective, while higher doses led to functional pseudo-males and various types of gonads that eventually differentiated into ovaries by 15 months.
- All-female embryos developed normally without transitioning to testis, demonstrating faster and more uniform growth compared to common fish, indicating the effectiveness of specific hormone treatments in maintaining female traits during development.*
Acp70A regulates Drosophila pheromones through juvenile hormone induction.
Insect Biochem Mol Biol
January 2015
CNRS UPR 9034, Université de Paris Sud, 91198 Gif sur Yvette, France. Electronic address:
Mated Drosophila melanogaster females show a decrease in mating receptivity, enhanced ovogenesis, egg-laying and activation of juvenile hormone (JH) production. Components in the male seminal fluid, especially the sex peptide ACP70A stimulate these responses in females. Here we demonstrate that ACP70A is involved in the down-regulation of female sex pheromones and hydrocarbon (CHC) production.
View Article and Find Full Text PDFTwo cases of pseudohermaphroditism in loggerhead sea turtles Caretta caretta.
Dis Aquat Organ
September 2013
Veterinary Services, Oceanogràfic, Ciudad de las Artes y las Ciencias, C/ Eduardo Primo Yúfera (Científic), 46013 Valencia, Spain.
Two juvenile (curved carapace lengths: 28 and 30 cm) loggerhead sea turtles Caretta caretta with precocious male external characteristics were admitted to the ARCA del Mar rescue area at the Oceanogràfic Aquarium in Valencia, Spain, in 2009 and 2010. Routine internal laparoscopic examination and subsequent histopathology confirmed the presence of apparently healthy internal female gonads in both animals. Extensive tissue biopsy and hormone induction assays were consistent with female sex.
View Article and Find Full Text PDFSex differences in activated corticotropin-releasing factor neurons within stress-related neurocircuitry and hypothalamic-pituitary-adrenocortical axis hormones following restraint in rats.
Neuroscience
March 2013
Department of Psychology and Neuroscience, University of Colorado at Boulder, USA.
Women may be more vulnerable to certain stress-related psychiatric illnesses than men due to differences in hypothalamic-pituitary-adrenocortical (HPA) axis function. To investigate potential sex differences in forebrain regions associated with HPA axis activation in rats, these experiments utilized acute exposure to a psychological stressor. Male and female rats in various stages of the estrous cycle were exposed to 30min of restraint, producing a robust HPA axis hormonal response in all animals, the magnitude of which was significantly higher in female rats.
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