Azithromycin preserves adult hippocampal neurogenesis and behavior in a mouse model of sepsis.
Level 5 - mechanism / opinion, no new human data
Bench and animal research with no human data
PubMed 38211636 · doi:10.1016/j.bbi.2024.01.005
What was done
Female C57BL6J mice were administered systemic lipopolysaccharide (LPS from E. coli) as a sepsis model to induce neuroinflammation, depression-like behavior, and hippocampal neurogenesis deficits. Researchers tested the capacity of the macrolide antibiotic azithromycin to counteract LPS-induced pro-inflammatory cytokine secretion in the hippocampus, behavioral alterations (immobility in the Porsolt test), adult hippocampal neurogenesis impairments (survival, maturation, and synaptic integration of adult-born dentate granule cells), and gut microbiome disruptions.
What was found
The abstract reports directions of effect without providing numerical measurements or effect sizes. Azithromycin reversed the LPS-induced increase in immobility time during the Porsolt test, reversed hippocampal secretion of pro-inflammatory cytokines, reversed neurogenesis impairments, promoted the synaptic integration of adult-born neurons, and functionally remodeled the gut microbiome.
Why it matters
This preclinical study indicates that azithromycin exhibits neuroprotective and immunomodulatory actions that preserve adult neurogenesis and mood-related behaviors in an inflammatory state, highlighting a potential mechanism for addressing inflammation-induced neurological decline.
Limits
This is an animal model study conducted exclusively in female mice; findings cannot be directly translated to human clinical outcomes. The abstract does not report sample sizes (n), drug dosages, treatment durations, or quantitative effect sizes.
Cited by
- supports Elevated levels of systemic inflammation reduce the rate of neurogenesis.