Naked Mole-Rat Queens Use 1 Chemical Signal to Block Reproduction and Prevent Succession
Updated
Updated · New Scientist · Jul 15
Naked Mole-Rat Queens Use 1 Chemical Signal to Block Reproduction and Prevent Succession
2 articles · Updated · New Scientist · Jul 15
Summary
Researchers identified isopropyl myristate, or IPM, as a queen-enriched odor in naked mole-rats that keeps other females infertile and helps preserve colony order.
771 odor samples and neural tests showed IPM is abundant in queens, detected through olfaction, and shifts prolactin and progesterone in non-breeders in ways that suppress reproduction.
18-week pairing experiments found pregnancies only in controls—5 of 6 pairs—while none occurred with colony bedding or daily IPM exposure, indicating the chemical alone can block reproductive activation.
12 weeks of daily IPM after queen removal kept a colony stable, but withdrawal triggered aggression within a week, one female's death, and the rise of a new pregnant queen.
The findings provide rare evidence of a mammalian pheromone-like signal governing eusocial hierarchy, drawing a mechanistic parallel with queen pheromones in insects.
A chemical in cosmetics controls mole-rat society. Should we re-evaluate the biological effects of common industrial ingredients?
If one molecule can build a stable society, could this discovery lead to new forms of social or reproductive control?
How did nature turn a simple chemical, also found in coconuts, into a 'social hormone' that prevents civil war?
The Chemical Key to Mammalian Eusociality: How Isopropyl Myristate Orchestrates Reproductive Suppression in Naked Mole-Rats (2026 Breakthrough)
Overview
In July 2026, scientists made a groundbreaking discovery by identifying isopropyl myristate (IPM) as the chemical key behind the eusocial structure of naked mole-rat colonies. Years of research revealed that the queen produces IPM, which acts as a scent signal to suppress reproduction in other colony members and maintain social order. This is the first time such a chemical has been definitively linked to social control in a mammal. The finding builds on earlier work showing naked mole-rats have a sophisticated sense of smell, highlighting how a single compound can orchestrate complex social behavior.