Key result
Barth Syndrome and CRLS1 deficiency impair brain mitochondrial function by disrupting cardiolipin metabolism.
Describes the role of cardiolipin metabolism in the brain in the context of Barth syndrome and cardiolipin synthase deficiency.
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Warrants neurological monitoring in Barth syndrome care; extends cardiolipin metabolism's role to brain mitochondrial homeostasis.
Cardiolipin (CL) is a glycerophospholipid found exclusively in the inner mitochondrial membrane consisting of a double glycerophosphate backbone and 4 acyl side chains; the profile of these side chains is largely tissue-specific. CL is involved in critical functions in the mitochondria, including organization of the respiratory chain, initiation of apoptosis, activation of mitophagy, and maintenance of bioenergetic homeostasis. Two major disorders of CL metabolism include Barth Syndrome (BTHS MIM 302060), an X-linked disorder caused by pathogenic variants in the gene TAFAZZIN resulting in abnormal CL remodeling and Combined Oxidative Phosphorylation Deficiency 57 (COXPD57 MIM 620167), an autosomal recessive disorder of defective nascent CL synthesis caused by pathogenic variants in CL Synthase, (CRLS1).
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Harris et al. (2026) studied Barth syndrome and cardiolipin synthase deficiency. Cardiolipin metabolism was evaluated. Cardiolipin metabolism is critical for mitochondrial function, and its disruption leads to Barth Syndrome and Combined Oxidative Phosphorylation Deficiency 57.
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