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Updated: Jul 4, 2026

A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis (ALS)
Published on: February 21, 2011
Therapy development for ALS: lessons learned and path forward
1Neurology Clinical Trials Unit, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts 02129, USA.
Abstract:
Several therapies have shown promise in preclinical models of motor neuron disease. Several of these treatment approaches, however, failed in human studies. In moving forward with new promising therapies, it is important to first identify whether the past trials were unsuccessful due to wrong therapy and biological target or because of flaws in trial design and conduct. We review treatment development in ALS and discuss the strengths and limitations of past clinical trials. Better biomarkers of disease and markers of biological activity of the therapies under development are urgently needed. Obtaining information regarding dosage, pharmacokinetics, short-term safety and biological activity in well designed phase I and II studies is critical to the design of phase III trials that will yield meaningful results.
Insights
Translating promising motor neuron disease therapies from preclinical success to human trials requires addressing past failures. Improving clinical trial design and developing better biomarkers are crucial for advancing treatments for amyotrophic lateral sclerosis (ALS).
Area of Science:
- Neuroscience
- Clinical Trials
- Drug Development
Background:
- Preclinical models show promise for motor neuron disease therapies.
- Many promising treatments have failed in human clinical studies.
- Past failures may stem from incorrect therapeutic targets or flawed trial design.
Purpose of the Study:
- To review treatment development in amyotrophic lateral sclerosis (ALS).
- To discuss the strengths and limitations of past ALS clinical trials.
- To identify critical needs for future ALS therapy development.
Main Methods:
- Review of existing literature on ALS treatment development.
- Analysis of past clinical trial designs and outcomes.
- Identification of challenges and unmet needs in ALS research.
Main Results:
- Several promising therapies failed in human trials, necessitating a re-evaluation of strategies.
- Past clinical trials for ALS have exhibited significant limitations.
- A critical need exists for improved biomarkers and markers of biological activity.
Conclusions:
- Future ALS therapy development must address reasons for past trial failures.
- Enhanced clinical trial design, including robust Phase I and II studies, is essential.
- Development of better biomarkers and activity markers is critical for successful Phase III trials.
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