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Aquatic Molecular Developmental Biology Lab
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The lab explores the evolution and developmental mechanisms of secondary sexual characteristics in fish.
AboutAbout the lab
How did the differences between males and females evolve?
The Aquatic Molecular Developmental Biology Lab uses fish such as medaka to study how differences in external morphology and behavior between males and females are created and have evolved.
The lab focuses on secondary sexual characteristics that are typical of males, and much of the mechanism of their evolution is still unknown.
Using methods from genetic engineering and developmental biology, the lab studies the evolution of the androgen receptor through the genome duplication that occurred specifically in teleosts, and the evolutionary and developmental mechanisms of the secondary sexual traits that led to the diversity of reproductive modes.
The model fish include medaka, mosquitofish, and swordtails.
Key terms
- androgen receptor
- A protein inside cells that receives male hormones (androgens) and changes how genes function
- genome duplication
- The entire set of genetic information (the genome) being duplicated as a whole. The lab focuses on the duplication that occurred specifically in teleosts
- chromatin
- The state in which DNA is folded together with proteins inside the cell nucleus. Its dynamics are involved in how genes function
ResearchResearch themes
The lab investigates how secondary sexual characteristics, the differences in external morphology and behavior between males and females, appear and have evolved. Using medaka and other fish as models, it aims to elucidate the underlying molecular mechanisms with methods from genetic engineering and developmental biology.
*Illustrative imageEvolution of the androgen receptor and secondary sexual characteristics
The lab predicts that the evolution of receptor genes through the genome duplication that occurred specifically in teleosts was the driving force behind the diversity of secondary sexual characteristics. By analyzing receptor mutant medaka and comparing fish that show pronounced secondary sexual characteristics, it investigates the genetic basis that gives rise to the basic program of secondary sexual characteristics and to differences between species.
*Illustrative imageMolecular mechanisms behind the appearance of secondary sexual characteristics
The lab studies how differences between tissues in secondary sexual characteristics, and their size (strength), are controlled, by looking at tissue changes during the process of their appearance and at the chromatin dynamics that drive them. As a further contribution, it also aims to develop environmental monitoring medaka that detect endocrine-disrupting chemicals (joint research with a company in France).
MembersFaculty
The members of the Aquatic Molecular Developmental Biology Lab consist of faculty members and graduate students.
- ProfessorYukiko Ogino
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Oryzias latipes(Hamamatsu,Shizuoka,Japan,2007)-2” Seotaro / CC BY-SA 3.0 (cropped)
- Evolution of the androgen receptor and secondary sexual characteristics: “Large fins tale en strong small fish round goby” Peter van der Sluijs / CC BY-SA 4.0 (cropped)
- Molecular mechanisms behind the appearance of secondary sexual characteristics: “Gasterosteus aculeatus - Epinoche - Three-spined stickleback” Gilles San Martin / CC BY-SA 2.0 (cropped)
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