The NP001 formulation of sodium chlorite acts through a plausible mechanism and preliminary data suggest that it is safe and may slow ALS progression in some PALS. The WF10 formulation of SC appears to act through this same mechanism. Although WF10 is available for off-label use, it is very expensive, may have more side-effects than NP001, and at this time has only scant anecdotal evidence for efficacy in PALS. ALSUntangled supports further carefully monitored studies of NP001 and WF10 in PALS. In contrast, oral sodium chlorite has potentially dangerous and toxic side-effects may hasten disease progression, and is not clearly absorbed from the gut. We do not recommend further use of oral sodium chlorite unless it can at least be shown to be safe and to act on mechanisms in humans that are relevant to ALS.
Risks (harms that occurred on this treatment)
Basis
Basis has mechanisms of action that could theoretically be useful in treating ALS. It appeared reasonably safe in a small, short duration study of healthy volunteers and it is fairly inexpensive. However, we found no data in preclinical ALS models, no case reports, and no trials in PALS. Based on this lack of data, ALSUntangled cannot currently recommend use of Basis to slow, stop, or reverse the progression of ALS.
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L-Serine
L-serine is a reasonably inexpensive, widely available nutritional supplement that has a plausible mech-anism by which it could help a subset of patients who might have ALS from BMAA-toxicity. A small Phase I trial showed that L-serine up to 15 g twice daily is relatively well tolerated. A larger follow up trial is planned and will shed further light on its safety and utility as an ALS therapeutic. Unfortunately, since it is challenging to reliably measure BMAA in PALS, it will be difficult to identify the subset most likely to respond. Until a reliable assay for measuring BMAA exposure in living people arises, or a follow up trial confirms safety and demonstrates benefit independent of this, we cannot recommend L-serine as a treatment for ALS.
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Inosine
Inosine is a low-cost supplement that increases the levels of urate, a naturally occurring antioxidant. With appropriate blood and urine monitoring, it appears reasonably safe. Epidemiologic data suggest that high urate levels may be associated with improved survival in ALS, which prompted preclinical studies and clinical trials of inosine. These are still ongoing and will help determine whether inosine could be a useful treatment for ALS.
Declaration of interest: ALSUntangled is sponsored by the ALS Association and the Motor Neurone Disease Association.
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Accilion
In our opinion, Accilion does not have a mechanism that is plausible for the treatment of ALS. There is one patient with a confirmed diagnosis of slowly progressive ALS who had modest objective improvements in motor function while using Accilion. However, improvements such as these have been described before, even in patients taking a placebo (32). We believe improvements in PALS are important to study, but they may have multiple explanations and thus are not proof of treatment efficacy (32). At this time we do not recommend the use of Accilion for ALS.
Declaration of interest: ALSUntangled is sponsored by the ALS Association and the Motor Neurone Disease Association.
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Precision Stem Cell
At ALSUntangled our goal is to provide guidance on the mechanism, pre-clinical data, anecdotal evidence, trials and risks of various alternative treatment options. Our goal is not to challenge the rights of PALS to pursue these options. Along these lines, MSC transplants in general have a promising mechanism, good pre-clinical data in ALS models and appear reasonably safe when performed with approved standardized protocols, proper oversight, and monitoring. However, the specific protocols used at PSC for PALS are poorly detailed, appear variable in terms of the sources of MSCs being used, the ways these are being modified and the places where these are being inserted, have no provision for confirming the material being inserted, and have only subjective and usually brief improvements associated with them. ALSUntangled strongly supports further study of MSC in PALS, but only with transparent, reproducible protocols that include confirmation of transplanted material and objective outcome measures. At this time, it does not appear to us that PSC is meeting these criteria.
Gluten-Free Diet
Theoretically, gluten-induced autoimmunity could trigger ALS. However, the data supporting this link are weak, consisting of two association studies and a single case-report. Further studies are needed to confirm the relationship between GRDs and ALS, and the utility of the GFD in patients with both conditions. In spite of the fact that GFD is reasonably safe, it is a complex undertaking and is more expensive than a standard diet. While we wait for better data, it would be reasonable to screen PALS who have GI symptoms, iron-deficiency anemia, or an abnormal brain MRI for the antibodies associated with GFDs. Those with elevated antibodies could be referred to a gastroenterologist for further work-up, and if this is consistent with a GRD, then GFD could be tried under the guidance and monitoring of a dietician.
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Hyperimmune Goat Serum for ALS
The mechanism of Aimspro remains unproven; if it is an immunomodulator and/or a modulator of sodium channels, it theoretically could be useful in ALS. A single, detailed but significantly flawed case report documents slowing in decline of certain respiratory functions in a patient claiming to have ALS, who started Aimspro shortly after bipap. Based upon this limited information, ALSUntangled supports further study of Aimspro, either in ALS animal models or in a small phase 2 trial with clear and objective endpoints carried out by skilled trialists familiar with the problems inherent with ALS clinical studies. Until a trial is undertaken, however, we do not support further use of this product by PALS.