Nikhil Prasad Fact checked by:Thailand Medical News Team Jul 14, 2026 1 hour, 38 minutes ago
Thailand Medical News: International Study Reveals Vitamin B3 Could Improve Survival in Rare Childhood Disorder
A new international study has provided encouraging evidence that high-dose niacin, a form of vitamin B3, may dramatically improve outcomes for children with the rare genetic condition known as NAXD deficiency. The research also expands doctors' understanding of the disease by identifying previously unrecognized heart-related and prenatal forms of the disorder, in addition to its well-known neurological presentation.
New international research suggests high-dose niacin may improve survival in children with the rare genetic disorder
NAXD deficiency while expanding understanding of its neurological and cardiac forms
The study was led by researchers from the University of Luxembourg, Murdoch Children's Research Institute, The University of Melbourne, Royal Children's Hospital Melbourne, Nicklaus Children's Health System (USA), Children's Hospital of Philadelphia, Hospital de Niños Dr. Ricardo Gutiérrez (Argentina), The Children's Hospital at Westmead, University of Sydney, University Hospital Southampton NHS Foundation Trust, University of Southampton, Vietnam National Children's Hospital, and Queensland Children's Hospital, together with other collaborating institutions.
A Rare Disorder That Can Turn Deadly After Fever
NAXD deficiency, also called Progressive Early-Onset Encephalopathy with Brain Edema and/or Leukoencephalopathy-2 (PEBEL2), is an extremely rare inherited metabolic disease. Children with the condition often appear healthy until a fever or common infection suddenly triggers rapid neurological deterioration. Many previously reported patients died shortly after these seemingly ordinary illnesses.
The disease develops because mutations in the NAXD gene prevent the body from repairing damaged forms of the vital energy-carrying molecules NADH and NADPH. As these damaged molecules accumulate, they interfere with normal energy production inside mitochondria, the tiny structures that generate energy for cells, particularly in the brain, heart, and muscles.
Nine New Patients Expand the Disease Spectrum
The researchers described nine previously unreported patients whose symptoms broaden the known clinical picture of NAXD deficiency.
Four children developed the classic neurological form of the disease, with severe brain deterioration after fever or infection. Two of these children became ill following COVID-19 infection.
Another four patients showed a very different pattern, developing serious heart disease, including myocarditis and cardiac dysfunction linked to mutations affecting the mitochondrial targeting sequence of the NAXD protein. The final case involved devastating prenatal brain damage that resulted in stillbirth, demonstrating that the disease can begin before birth in some individuals.
These findings show that NAXD deficiency is far more diverse than previously believed and should be considered even in patients whose primary symptoms involve the heart rather than the brain.
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t;strong>Laboratory Tests Explain Why the Disease Is So Severe
To better understand the disorder, scientists analyzed patient skin cells and examined how the genetic mutations affected the NAXD protein.
They found large accumulations of damaged NAD(P)HX molecules in patient cells, confirming that the enzyme responsible for repairing these compounds was no longer functioning properly. Several newly identified mutations also produced unstable NAXD proteins that lost their normal structure, became poorly soluble, or rapidly lost activity when exposed to higher temperatures. This helps explain why fever often triggers sudden clinical collapse.
Advanced protein analysis further revealed that different genetic mutations produced distinct molecular signatures. Patients with neurological disease showed abnormalities involving mitochondrial energy production, while those with cardiac disease displayed different protein pathway disruptions, suggesting separate biological mechanisms despite sharing the same underlying genetic defect.
This
Thailand Medical News report highlights how sophisticated laboratory investigations are helping researchers understand why patients with the same disorder can develop remarkably different symptoms.
Niacin Shows Remarkable Promise
Perhaps the most encouraging finding involved treatment. Four children in the study received high-dose niacin therapy and all survived repeated infections and fever episodes that might previously have proved fatal. At the time of publication, every treated child remained alive.
The researchers noted that, when combined with careful management of fever and infections, niacin appears capable of reducing disease severity. Earlier reports had already suggested potential benefits, but the addition of these new patients strengthens the evidence that vitamin B3 may represent one of the first effective treatments for this devastating mitochondrial disease.
Conclusion
The findings significantly reshape medical understanding of NAXD deficiency by revealing that it can affect not only the brain but also the heart and even fetal development before birth. Equally important, the growing evidence supporting niacin therapy offers genuine hope for affected families. Although larger studies and long-term follow-up are still needed to determine optimal dosing and long-term safety, early diagnosis combined with prompt niacin treatment could substantially improve survival and quality of life for patients with this previously devastating inherited disorder.
The study findings were published in the peer reviewed Journal of Inherited Metabolic Disease.
https://onlinelibrary.wiley.com/doi/10.1002/jimd.70217
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Thailand Medical News.
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https://www.thailandmedical.news/articles/supplements
https://www.thailandmedical.news/articles/coronavirus
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