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A slow-burning disease like Charcot Marie Tooth can fool even the best trials. Scores swing with sleep and stress, not biology, while tiny changes accumulate out of sight. We set out to replace guesswork with measurement and show how the right biomarkers can compress timelines, cut costs, and turn promising science into treatments that matter.

First, we unpack the measurement problem and why functional scales are too noisy for a disease that changes over years. Then we get concrete. MRI fat fraction reveals muscle-to-fat replacement in just 43 days, letting us see whether a therapy slows degeneration without waiting 18 months for a clinic score to budge. From there we move molecular: proteomics shows drops in extracellular matrix and neuronal development proteins alongside rising metabolic stress signals, reframing CMT as both a structural and metabolic disorder. That shift sets up a powerful case study—sorbitol accumulation traced to an enzyme defect—where a biomarker connected patients to a drug already in development for another condition.

We also highlight the rise of digital biomarkers that live where patients do. Wearables capture fatigue, drop foot, and real stair performance over weeks, producing real-world evidence that complements imaging and blood markers. None of this works without patient partnership, so we talk candidly about biobanks, why longitudinal samples are non-negotiable, and how skin cells reprogrammed into neurons enable personalized drug screens without invasive nerve biopsies. Finally, we tackle the big strategic question: will a universal marker like neurofilament light unlock progress across 100-plus genetic subtypes, or do we need a unique fingerprint for each?

If you care about faster trials, smarter endpoints, and bringing CMT treatments to the pharmacy shelf sooner, this deep dive is for you. Subscribe, share with someone in the CMT community, and leave a review with your take: master biomarker or many subtype markers?

Ways to take action now

1) Donate blood at an HNF Roadshow:
You can donate blood for biomarker research at an HNF Roadshow near you. Click on the “Location” tab to view 2026 dates and sites:

2) Join Studies & Donate blood at the CMT Summit + Retreat:
Attending the Summit? You can also donate blood on-site to support HNF’s biobank and biomarker discovery efforts—helping accelerate progress toward FDA-qualified measures and future treatments.

3) Join or update GRIN:
If you’re already in the GRIN Registry, please log in and complete any annual updates—every data point strengthens the research.

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