The authors wrote that ALS patients with antibodies to TG6 demonstrated the typical symptoms and rate of disease progression of ALS, while the healthy volunteers with antibodies to TG6 showed no symptoms of any disease.
Neither the ALS patients nor the volunteers had the antibodies to TG2 typically associated with celiac disease, but the ALS patients were more likely than the volunteers to demonstrate the genetic mutations that put them at risk for celiac disease.
Drory said her team is now studying TG6 antibody levels in patients newly diagnosed with ALS. They will be testing the effects of a gluten-free diet in some of those that test positive. She doesn't expect any results to turn up, though, for at least another two years.
While that's underway, she advises ALS patients not to experiment on themselves. "Patients should not be tempted to use a gluten-free diet without clear evidence for antibodies, because an unbalanced diet might harm," she told Reuters.
"Especially in ALS we know that maintaining a good caloric intake and weight improves prognosis. While one can achieve a good caloric intake with a gluten-free diet, this should be done only under dietician advice and in the specific patients in whom antibodies are detected."
As always, keep in mind that correlation does not necessarily mean causation. Past studies have actually found that there is no link between gluten and ALS, so obviously, more research needs to be done.