Model: Old (17- to 19-month-old) C57BL6 mice 
Dosage: 14 mg/mg/day of rapamycin in food for 5 months

A purported longevity drug, rapamycin, alters immune cells associated with cancer and reduces brain inflammation in mice. 

Immunity

Mitochondria-Made Molecule Reverses Memory Loss with Advanced Age

A naturally occurring compound, α-lipoic acid, helped elderly mice think like younger mice by restoring energy balance and calming brain inflammation, according to Second Hospital of Hebei Medical University researchers.

(Alpha-lipoic acid’s molecular structure | Sasha’s of Saratoga)

Brain &amp; Neurons

Harvard: Microbiome Depletion Rejuvenates the Aging Brain

Harvard researchers find that aged mice lacking gut bacteria exhibit a brain more like that of young mice. 

The Principal Investigator of the study, Dr. Lee Rubin (image: harvard.edu). 

Model: 22-month-old male C57BL/6NIH mice 
Dosage: 400 mg/kg of NR for eight weeks, administered in food

Treating aged mice with the NAD+ (nicotinamide adenine dinucleotide) precursor NR (nicotinamide riboside) improves memory and reduces pro-inflammatory immune cells.

Senior members of the research team, Dr. Bruce R. Troen and Dr. Kenneth L. Seldeen (image: buffalo.edu).  

The longevity gene klotho prolongs the lifespan of mice while preventing muscle, bone, and brain aging. 

Miguel Chillón, PhD, and Laura Rodriguez-Estevez, researchers from Universitat Autònoma de Barcelona in Spain, who conducted the study (image: uab.cat) 

Search Result: Microglia

Rapamycin Elevates Immune Cells That Can Battle Cancer Cells, New Study Shows

Mitochondria-Made Molecule Reverses Memory Loss with Advanced Age

New Harvard Study: Microbiome Depletion Rejuvenates the Aging Brain

NAD+ Supplement Improves Memory & Brain Immune Cells, New Study Reveals

One-Time Anti-Aging Gene Therapy Treatment Prolongs Life by 20%, New Study Shows