Hormone loss and excess shortened lifespan in zebrafish
In genetic experiments, both deficiency and overproduction of the hormone apelin disrupted development and markedly reduced fertility in male and female zebrafish.
The catch: Developmental defects could contribute to shorter lifespan independently of faster adult aging
Edited by Boris Djordjevic · AgingResearch.News
In zebrafish, researchers used genetic experiments to reduce the function of apelin, a hormone, or trigger its overproduction. Both changes disrupted embryonic development, shortened adult lifespan and markedly reduced fertility in both sexes.
Young adult mutant fish had gene-activity patterns resembling those of aged fish without the mutation. Both apelin loss and excess also disrupted development of a hormone-control system linking the brain, pituitary gland and thyroid. The researchers identified Atoh8, a protein that regulates gene activity, as a candidate mediator of apelin signaling. Supplying RNA instructions for making Atoh8 partly corrected developmental defects in apelin mutants, including brain and pituitary developmental markers and thyroid volume.
Why it matters
The lifespan and gene-activity results provide a framework for investigating apelin’s broader contributions to aging in vertebrates.
Caveats
These were genetic experiments in zebrafish, not tests in people; resembling older fish in gene activity does not by itself establish faster aging. The paper is a preprint and has not been peer-reviewed.
- ATOH8 mRNA
- APLN
- ATOH8
- ATOH8 expression
- Hypothalamic thyrotropin-releasing hormone-expressing cell count
- Zebrafish
The paper
Apelin signaling controls neuroendocrine homeostasis via Atoh8-dependent transcriptional regulation
Mdibl
bioRxiv, Nov 3, 2026, Open access, CC BY-NC-ND, Preprint, not yet peer-reviewed
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