Cookies

Like most websites The Translational Scientist uses cookies. In order to deliver a personalized, responsive service and to improve the site, we remember and store information about how you use it. Learn more.
Research Field Diagnostics & prognostics, Genetics, Microbiology

Better Biopsies for Amyloidosis?

Transthyretin-mediated amyloidosis (TTR) is an inherited condition that causes familial amyloid polyneuropathy (FAP), a disease that often proves fatal within just a decade. TTR-FAP is usually diagnosed by a sural nerve biopsy, followed by genetic testing – but it is a highly invasive procedure, and the distribution of amyloid aggregates the pathologist is looking for to make a diagnosis can be patchy. And that’s why correct early diagnosis of the condition is uncommon (1).

A group of Johns Hopkins physicians have developed a modified approach using a skin punch biopsy, with the aim of creating a faster and relatively less invasive method of diagnosis. In a small study of 30 FAP mutation carriers, 40 controls, and two patients with non-inherited amyloidosis, distal leg skin punch tissue samples stained with Congo red had a 70 percent sensitivity and 100 percent specificity in diagnosing TTR-FAP (see Figure 1). The team also found that higher levels of amyloid aggregate were associated with loss of nerve fibers – which could lead to a new method of estimating disease severity, and monitoring progression. They hope that with a potential method for providing diagnostic and prognostic information less invasively, clinical trials of therapies could advance more quickly.

The current method has only been tested on the most common FAP-causing TTR mutations, but the team hope that their work can be built upon. “If further studies confirm and extend what we have found, we may use the skin biopsy as a biomarker for disease severity. And we will be able to diagnose more patients sooner,” said Michael Polydefkis, professor of neurology and senior author of the study. “The good news is that drug companies are using our skin biopsy technique in ongoing clinical trials to monitor treatment success,” he added (2).

Enjoy our FREE content!

Log in or register to gain full unlimited access to all content on the The Translational Scientist site. It’s FREE and always will be!

Login

Or register now - it’s free and always will be!

You will benefit from:

  • Unlimited access to ALL articles
  • News, interviews & opinions from leading industry experts
Register

Or Login via Social Media

By clicking on any of the above social media links, you are agreeing to our Privacy Notice.

  1. GJ Ebenezer et al., “Cutaneous nerve biomarkers in transthyretin familial amyloid polyneuropathy”, Ann Neurol, 82, 44–56 (2017). PMID: 28598015.
  2. Johns Hopkins Medicine, “Faster diagnosis of inherited and lethal nerve disease could advance search for new treatments”, (2017). Available at: bit.ly/2xgebL1. Last accessed October 4, 2017.

About the Author

Roisin McGuigan

I have an extensive academic background in the life sciences, having studied forensic biology and human medical genetics in my time at Strathclyde and Glasgow Universities. My research, data presentation and bioinformatics skills plus my ‘wet lab’ experience have been a superb grounding for my role as a deputy editor at Texere Publishing. The job allows me to utilize my hard-learned academic skills and experience in my current position within an exciting and contemporary publishing company.

Related Solutions

Research Field Drug discovery

Dental Curing Lights: Clinical Reality

| Contributed by Ocean Optics

Research Field Genetics

Measuring DNA Absorbance with the STS-UV

| Contributed by Ocean Optics

Newsletter

Send me the latest from The Translational Scientist.

Sign up now

Register to The Translational Scientist

Register to access our FREE online portfolio, request the magazine in print and manage your preferences.

You will benefit from:

  • Unlimited access to ALL articles
  • News, interviews & opinions from leading industry experts

Register