Trinity compound research profile
FOXO4-DRI
FOXO4-DRI (sometimes called proxofim) is a lab-made peptide built by fusing a piece of a natural protein called FOXO4 to a special "delivery tag" borrowed...
Research overview
FOXO4-DRI (sometimes called proxofim) is a lab-made peptide built by fusing a piece of a natural protein called FOXO4 to a special "delivery tag" borrowed from the HIV virus that helps it get inside cells (Baar et al., Cell 2017). It's specifically engineered to target and destroy "senescent" cells — these are old, damaged cells that have stopped dividing but refuse to die, sometimes called "zombie cells," which build up as we age and cause inflammation.
Mechanism under study
Normally, zombie cells survive because a protein called FOXO4 grabs onto another protein called p53 (which usually tells damaged cells to self-destruct) and holds it hostage inside the cell, preventing it from doing its job. FOXO4-DRI works by cutting in line — it competes with the real FOXO4 and steals p53 away, freeing it up to do what it's supposed to do: trigger the zombie cell to self-destruct through a process called apoptosis (programmed cell death) (Baar et al. 2017; Krimpenfort & Berns, Cell 2017).
Human evidence summary
There are zero human studies of any kind. No clinical trials have ever tested this peptide in people.
Preclinical evidence summary
All the existing evidence comes from mice. The peptide selectively killed aged/damaged cells nearly 12 times more than healthy cells in lab dish tests. In mice, it reversed weight loss and liver damage caused by chemotherapy, and in naturally aging mice and a fast-aging mouse strain, it restored fur thickness, made mice more responsive to stimuli, increased their activity on a running wheel, and improved several kidney health markers (Baar et al. 2017). Any talk of human "rejuvenation" is purely a guess based on these mouse results — there's no human data to back it up yet.
Source material
Use the linked publications and records to evaluate study design, population, limitations, and relevance.