AAN 2017: An Emerging Clinical Trial Endpoint Gathers Strength in ALS

May 8, 2017 - als

Strength in fewer numbers? A strength-based endpoint might assistance detect a intensity healing advantage in people with ALS. The approach, grown by Biogen, leveraged flesh measurements performed during a proviso 3 clinical hearing of dexpramipexole (see January 2013 news). [Douma et al., 2014 underneath CC BY 2.0 license.]

A new outcome magnitude might assist contrast of therapies for ALS according to a retrospective investigate presented during a 69th Annual Meeting of a American Academy of Neurology (AAN 2017) in Boston. The strategy, grown by a investigate group led by Biogen’s Toby Ferguson, involves primer strength contrast of pivotal muscles in a arms and legs. Changes in this outcome magnitude could be rescued over time in people with bulbar and spinal conflict ALS, that correlated with pivotal organic outcomes including ALS-FRS, presence and forced critical capacity. A sum of 924 people with ALS participated in a study.

The approach, that is formed on hand-held dynamometry, involves a quantitative strength contrast of 4 sets of muscles; one span in a hand, elbow, thigh and reduce leg. The endpoint is formed on a time it takes a initial set of these muscles to totally remove strength during a march of a disease.

The strategy, according to a energy investigate presented during AAN 2017, requires as few as 200 people with ALS to detect a healing advantage in a two-treatment one-year study. This is 25% of a series of clinical hearing participants indispensable regulating ALS-FRS as a primary endpoint.

Together, a formula advise that quantitative flesh strength has a intensity to be used as a primary outcome magnitude in clinical trials for ALS. And, might capacitate intensity therapies for ALS to be evaluated for shorter time durations in a smaller representation size.

The commentary come during a heels of a prior study, led by Barrow Neurological Institute’s Jeremy Shefner in Arizona, that found that quantitative strength contrast of pivotal flesh groups in a clinical hearing environment could reliably and reproducibly magnitude course of ALS (Shefner et al., 2016).

The outcome measure, compared to existent approaches, is some-more supportive and reduction time-consuming given it involves a dimensions of 50% fewer muscles. The strategy, according to Ferguson, is now being serve validated. Stay tuned.


Shefner JM, Liu D, Leitner ML, Schoenfeld D, Johns DR, Ferguson T, Cudkowicz M. Quantitative strength contrast in ALS clinical trials. Neurology. 2016 Aug 9;87(6):617-24. [PubMed].

Further Reading

Shefner JM. Strength Testing in Motor Neuron Diseases. Neurotherapeutics. 2017 Jan;14(1):154-160. [PubMed]


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