Can we reverse molecular aging? For years, scientists believed that certain age-related protein damage was permanent. A groundbreaking new study published in Nature Communications suggests we might finally be able to repair it.

The Problem: “Chemical Aging”

As we age, sugars and reactive molecules react non-enzymatically with long-lived proteins in our bodies (such as collagen in skin and blood vessels). This creates permanent damage known as Advanced Glycation End Products (AGEs).

• One of the most common and damaging AGEs is CML (-carboxymethyl-lysine).
• The impact: CML stiffens tissues, disrupts normal protein function, and triggers chronic inflammation and oxidative stress.
• The challenge: Until now, CML damage was considered completely irreversible once formed.

The Solution: Engineering “CMLase”

Researchers at Revel Pharmaceuticals, Calico Life Sciences, and the University of Colorado engineered a novel enzyme, CMLase, through directed evolution (screening more than 500 million variants!).

CMLase acts like a precision molecular tool: it specifically targets and clips away the CML modification, restoring the protein to its native, healthy state.

Key Highlights & Results

• Works across diverse proteins: In laboratory testing, CMLase successfully removed CML damage from key structural and transport proteins, including collagen, hemoglobin, casein, and eye extracts.
• Repairs aged human tissues:
  • Aged Lens: Reduced CML content in human lens proteins from a 64-year-old donor by up to 78%.
  • Arterial Walls: Cleared over 70% of accumulated CML from 75-year-old donor human arterial tissue.
  • Skin: Reduced CML levels in elderly human skin by over 55%, lowering them below those found in 31-year-old tissue!

Why This Matters

This study offers crucial proof-of-concept: molecular damage once thought to be a permanent hallmark of aging can be actively erased and repaired by engineered enzymes.

While more research is needed to assess tissue penetration and clinical safety in living models, CMLase paves the way for an entirely new class of regenerative therapeutics targeting age-related and diabetic complications.

Paper Title: Reversal of protein chemical aging by enzymatic deglycation

Journal: Nature Communications (2026)

#Longevity #Biotech #AntiAging #ProteinRepair #TranslationalMedicine #Biochemistry #HealthSpan