Kataaki Okubo

This study shows brain-derived estrogens enhance male-typical behaviors in medaka by boosting androgen receptor signaling, even though androgens can act directly in other vertebrates.

The paper identifies cholecystokinin as the FSH-releasing hormone (FSH-RH) in medaka, challenging the solo GnRH model and proposing a dual GnRH model in vertebrates.

This study shows that male medaka use two distinct androgen receptor pathways to decide whether to mate or fight, with Ara promoting aggression and Arb promoting courtship.

The paper shows that androgen-dependent vasotocin expression in medaka's tuberal hypothalamus is linked to aggression, though its role in male-typical behavior remains to be validated.

The paper shows that balanced release of NPFF and GnRH in TN-GnRH neurons modulates male sexual behavior in medaka, with double knockout showing normal behavior.

This study shows that neuropeptide B mediates female sexual receptivity in medaka fish in a female-specific and reversible manner through estrogen-dependent regulation.