Biallelic Variants in COQ4 Cause Childhood‐Onset Pure Hereditary Spastic Paraplegia.

This article discusses a case report of a 6-year-old female with childhood-onset pure hereditary spastic paraplegia (HSP) caused by biallelic variants in the COQ4 gene. HSP is a genetically and clinically diverse condition characterized by lower limb spasticity and weakness. The patient's symptoms included progressive lower limb spasticity, delayed motor development, and the need for assistive devices for walking. Genetic testing confirmed the presence of two variants in the COQ4 gene, one of which has been associated with severe phenotypes. This case expands the understanding of COQ4-associated HSP and highlights the importance of genetic testing in diagnosing the condition. The text also discusses the association between COQ4 deficiency and hereditary spastic paraplegia (HSP), a neurological disorder characterized by progressive stiffness and weakness in the legs. The text describes several variants of COQ4 deficiency found in Chinese families, some of which also involve epilepsy and vision impairment. The age at onset of symptoms varies, and functional studies have shown reduced levels of CoQ10 in patients with COQ4 deficiency. The text emphasizes the importance of reanalyzing genetic data and highlights the potential therapeutic implications of supplementing CoQ10. [Extracted from the article]