DAF-2 degradation in male C. elegans: over 440% longer median lifespan
In male C. elegans, degrading the DAF-2/IGF-1 receptor throughout the body increased median lifespan by more than 440% and prolonged reproductive health; germline-only degradation shortened lifespan, opposite to hermaphrodites. [1]
Automatic summary · not editorially reviewed
The key findings
Most C. elegans aging studies used hermaphrodites, and little was known about male-specific responses to pro-longevity mutations. [1]
Ubiquitous DAF-2 degradation in male C. elegans increased median lifespan by more than 440%. [1]
Degrading DAF-2 in the male germline decreased lifespan, opposite to its effect in hermaphrodites. [1]
The source at a glance
- Study type / format
- Preclinical experimental study in a nematode model (abstract)
- Population / context
- Male Caenorhabditis elegans nematodes, compared with prior findings in hermaphrodites
- Summary based on
- Study abstract
- Original publication
- August 24, 2026
Male nematodes versus hermaphrodite aging studies
The abstract notes that males and females differ markedly in health and lifespan trajectories, but the basis is not fully understood. In the C. elegans nematode model, most aging studies used hermaphrodites, and little was known about male-specific responses to pro-longevity mutations. Earlier work used an auxin-inducible degron system to degrade the DAF-2/IGF-1 receptor in hermaphrodites, where both ubiquitous and tissue-specific degradation extended lifespan. This study therefore examined males.
Supporting source [1]
Body-wide DAF-2 loss extends male lifespan and reproduction
Ubiquitous degradation of DAF-2 in male C. elegans increased median lifespan by more than 440%, described as one of the longest lifespan extensions by a single intervention to date. Using male mating and reproductive success as a measure of healthspan, the authors found that ubiquitous DAF-2 degradation greatly prolonged reproductive health, likely by prolonging function of the male intromittent organ in the tail.
Supporting source [1]
Germline DAF-2 loss shortens male lifespan
In contrast, degrading DAF-2 in the male germline decreased lifespan, the opposite of its effect in hermaphrodites. The authors present this as further evidence for studying sex differences in aging and for using C. elegans males to understand the basis of enhanced lifespan and healthspan.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Findings come from the C. elegans nematode model, not humans. The abstract reports no sample sizes, replication details or statistical uncertainty, and the proposed explanation for prolonged reproductive health (intromittent organ function) is stated as likely, not established.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Al-Saadi RS, Lewack HB, Phillips PC. · europepmc.org · August 24, 2026