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Updated: Nov 1, 2025

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Homozygous Missense Variation in PNPLA8 Causes Prenatal-Onset Severe Neurodegeneration
Suzena Masih1, Amita Moirangthem1, Shubha R Phadke1
1Department of Medical Genetics, Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India.
Abstract:
The patatin-like protein family plays an important role in various biological functions including lipid homeostasis, cellular growth, and signaling. Conserved across species, the patatin domain is shared by all 9 members of the PNPLA family without redundancy in the coding sequences. The defective function of PNPLA2, PNPLA6, and PNPLA9 are known to cause mitochondrial-related neurodegeneration. Recently, PNPLA8 has been associated with mitochondrial myopathy and poor weight gain with lactic acidosis in 3 unrelated families. Using whole-exome sequencing, we identified a homozygous novel missense variation c.1874A>G in the patatin domain of PNPLA8. The patient had prenatal-onset severe and progressive neurodegeneration with mortality in infancy.
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