Evidence map›Paper›PMID 32892962›Full record

ReviewSeminars in pediatric neurology2020

Treatment of Folate Metabolism Abnormalities in Autism Spectrum Disorder.

Richard E Frye, Daniel A Rossignol, Lawrence Scahill, Christopher J McDougle, Harris Huberman, Edward V Quadros

3 registry-linked trialsOpen access · hybridAbstract readReview
In one paragraph

Review in Seminars in pediatric neurology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
2.6field-weighted citation impact, top 10% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT02839915 phase2active not recruitingnot on this map

Leucovorin for the Treatment of Language Impairment in Children With Autism Spectrum Disorder

TypeinterventionalSponsorSouthwest Autism Research & Resource CenterRan2020 to 2026Enrolled56ConditionsAutism Spectrum DisorderArmsFolinic Acid, Placebo
NCT04060017 phase2active not recruitingnot on this map

Early Treatment of Language Impairment in Young Children With Autism Spectrum Disorder With Leucovorin Calcium

TypeinterventionalSponsorSouthwest Autism Research & Resource CenterRan2020 to 2026Enrolled80ConditionsAutism Spectrum Disorder, Language DisordersArmsLevoleucovorin Calcium, Placebo
NCT04060030 phase2recruitingnot on this map

Treatment of Social and Language Deficits With Leucovorin for Young Children With Autism

TypeinterventionalSponsorSouthwest Autism Research & Resource CenterRan2020 to 2026Enrolled80ConditionsAutism Spectrum Disorder, Language DisordersArmsLevoleucovorin Calcium, Placebo
3 · Its place in the literature

Who cites it

25 citing papers in PubMed, 45 citations in OpenAlex.

  1. Trial
  2. Article
  3. Review
  4. Tunable gene expression in zebrafish using RiboSCALE.bioRxiv : the preprint server for biology · 2026
    Article
  5. Review
  6. Folate in autism neurodevelopment.Frontiers in nutrition · 2026
    Review
  7. Review
  8. Review
  9. Article
  10. Review
  11. Article
  12. Review
  13. Article
  14. Review
  15. Review
  16. Article
  17. Article
  18. Article
  19. Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 5 institutions in 1 country.

Richard E FryeBarrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ. Electronic address: rfrye@phoenixchildrens.com.
Daniel A RossignolRossignol Medical Center, Aliso Viejo, CA.
Lawrence ScahillDepartment of Pediatrics, Emory University and Marcus Autism Center, Atlanta, GA.
Christopher J McDougleDepartment of Psychiatry, Harvard Medical School, Boston MA and Lurie Center for Autism, Lexington, MA.
Harris HubermanDepartments of Pediatrics, State University of New York - Downstate, Brooklyn, NY.
Edward V QuadrosDepartments of Medicine, State University of New York - Downstate, Brooklyn, NY.
Barrow Neurological Institute · USCenter for Autism and Related Disorders · USEmory University · USState University of New York · USSUNY Downstate Health Sciences University · US

Funding

Yale Clinical and Translational Science Award (U Component)UL1TR001863 · NCATS · YALE UNIVERSITY · PI John H. Krystal, LUCILA OHNO-MACHADO · 2016 to 2026
$102.9M
A High-dose Folinic Acid Treatment for Core and Associated Symptoms of AutismR01HD088528 · NICHD · PHOENIX CHILDREN'S HOSPITAL · PI FRYE, RICHARD EUGENE · 2017 to 2021
$2.8M
NCATS NIH HHS UL1 TR001863NICHD NIH HHS R01 HD088528
6 · The paper itself

Abstract

Autism spectrum disorder (ASD) is a heterogeneous neurodevelopmental disorder that currently has no approved medical therapy to address core symptoms or underling pathophysiological processes. Several compounds are under development that address both underlying pathophysiological abnormalities and core ASD symptoms. This article reviews one of these treatments, d,l-leucovorin calcium (also known as folinic acid) for treatment of folate pathway abnormalities in children with ASD. Folate is a water-soluble B vitamin that is essential for normal neurodevelopment and abnormalities in the folate and related pathways have been identified in children with ASD. One of these abnormalities involves a partial blockage in the ability of folate to be transported into the brain utilizing the primary transport mechanism, the folate receptor alpha. Autoantibodies which interfere with the function of the folate receptor alpha called folate receptor alpha autoantibodies have been identified in 58%-76% of children with ASD and independent studies have demonstrated that blood titers of these autoantibodies correlate with folate levels in the cerebrospinal fluid. Most significantly, case-series, open-label, and single and double-blind placebo-controlled studies suggest that d,l-leucovorin, a reduced folate that can bypass the blockage at the folate receptor alpha by using the reduced folate carrier, an alternate pathway, can substantially improve particular symptoms in children with ASD, especially those positive for folate receptor alpha autoantibodies. This article reviews the current evidence for treating core and associated symptoms and underlying pathophysiological mechanisms in children with ASD with d,l-leucovorin.

Indexed as

Autism Spectrum DisorderFolic AcidFolic Acid DeficiencyAutoantibodiesChildFolate Receptor 1HumansLeucovorinVitamin B ComplexAutoantibodiesFolate Receptor 1Folic AcidFOLR1 protein, humanLeucovorinVitamin B Complex

Identifiers

PMID32892962
PMCPMC7477301
OpenAlexW3037241573

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.