Reduced incidence and delayed occurrence of fatal neoplastic diseases in growth hormone receptor/binding protein knockout mice.
Level 5 - mechanism / opinion, no new human data
Animal research without human clinical data
PubMed 19228785 · doi:10.1093/gerona/glp017
What was done
Pathological assessments were conducted on growth hormone receptor/binding protein (GHR/BP) knockout mice and wild-type littermate controls to determine the specific effect of GH/IGF-1 axis deficiency on age-related fatal neoplastic diseases.
What was found
GHR/BP knockout mice showed a lower incidence and delayed occurrence of fatal neoplastic lesions compared to wild-type littermates. The abstract reports no quantitative values, proportions, or statistical metrics.
Why it matters
The findings demonstrate that specific disruption of the somatotropic axis is sufficient to delay and reduce fatal cancers in rodents, mirroring effects seen in caloric restriction and clarifying mechanisms underlying extended lifespan.
Limits
Findings from mouse knockout models cannot be directly generalized to humans. The abstract omits sample sizes, tumor types/classifications, quantitative survival metrics, and statistical significance levels.
Cited by
- supports Knocking out the growth hormone receptor in mice extends lifespan by 40% to 50% and approximately half reach old age with no observable diseases.