James' World 2

Hmmmm… Poor and young MAGA people have been Bamboozled by the current administration!

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According to Martin Makary, head of the US Food and Drug Administration (FDA), the drug leucovorin will help “hundreds of thousands of kids” with autism. But a day after Makary praised leucovorin’s powers at a White House event, some specialists are warning that the science to warrant Makary’s enthusiasm is far from solid.

Those researchers say that the drug’s efficacy has not been established, that scientists don’t know how much of the drug to give or how people should take it, and that safety data in children are lacking. According to the FDA’s current plans, leucovorin will be available to only a minority of autistic people.

All of this has led to widespread confusion, say clinicians, who also worry about the expectations created by Makary and other officials in the administration of US president Donald Trump.

“I’ve heard from a lot of families,” says psychologist Catherine Lord at the University of California, Los Angeles. “The major thing they say is, ‘What is this? What do we do?’”

“I don’t want to get everyone’s hopes up that this is a magic cure,” says Rebecca Schmidt, a molecular epidemiologist at the University of California, Davis. “It’s not for everybody.”

Vitamin in the spotlight

At an announcement on 22 September, Makary announced the upcoming approval of leucovorin, a form of the vitamin folate, by saying it would “open the door to the first FDA-recognized treatment pathway for autism”. People with low levels of folate in the protective fluid surrounding the brain and spine can sometimes exhibit traits associated with autism, including challenges in social communication. This condition, called cerebral folate deficiency, could be due to rogue antibodies that attack the body’s own proteins – in this case, proteins that ensure import of folate into the brain.

There have been clinical trials of leucovorin, also called folinic acid, in autism, but the studies to date have been small. For example, one recent clinical trial enrolled about 80 children aged 2 to 10, and provided folinic acid supplements to about half of the participants. Neither the participants nor their physicians knew who received the supplement and who received a placebo. Participants who received the supplement reported greater improvements in social interactions and language skills than those who received the placebo.

After the trial was published, some researchers subsequently raised concerns that the assessment of those improvements was subjective, and that the study was too small to detect subtle differences in response.

Call for bigger trials

But size is not the only thing that matters in clinical trials, says Dan Rossignol, a family physician in Aliso Viejo, California, who has studied the data on leucovorin and sometimes prescribes it to autistic children. The effect of leucovorin in the trials has been large enough to be apparent even with small numbers of participants, he says. Specifically, Rossignol points to an early leucovorin clinical study, in which only 48 children participated but some experienced marked improvements in a standardized assessment of speech.

“But it would be great if more studies were done with more kids,” he says. “Then w

e could tease out which kids respond better.” Typically, studies submitted for FDA approval of a drug for autism might have data from hundreds of children, he says, but it has been difficult to raise the money for bigger trials. Rossignol says that he and a colleague have been in discussions with US President Donald Trump’s administration to make the case for leucovorin.On Monday, the Trump administration said the US National Institutes of Health plans to monitor the effects of the FDA’s anticipated approval and to study possible broader benefits of leucovorin in autistic people. No details have been released as to how such studies will be designed.

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