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Fabra, María Alcázar; Paredes‐Fuentes, Abraham J.; Torralba Carnerero, Manuel; Moreno Férnandez de Ayala, Daniel J.; Arroyo Luque, Antonio; Sánchez Cuesta, Ana; Staiano, Carmine; Sanchez‐Pintos, Paula; Luz Couce, María; Tomás, Miguel; Marco‐Hernández, Ana Victoria; Orellana, Carmen; Martínez, Francisco; Roselló, Mónica; Caro, Alfonso; Oltra Soler, Juan Silvestre; Monfort, Sandra; Sánchez, Alejandro; Rausell, Dolores; Vitoria, Isidro; del Toro, Mireia; Garcia‐Cazorla, Angels; Julia‐Palacios, Natalia A.; Jou, Cristina; Yubero, Delia; López, Luis Carlos; Hernández Camacho, Juan Diego; López Lluch, Guillermo; Ballesteros Simarro, Manuel; Rodríguez Aguilera, Juan Carlos; Calvo, Gloria Brea; Cascajo Almenara, María Victoria; Artuch, Rafael; Santos‐Ocaña, Carlos
Journal of inherited metabolic disease, 07/2024Journal Article
Abstract The protein encoded by COQ7 is required for CoQ 10 synthesis in humans, hydroxylating 3‐demethoxyubiquinol (DMQ 10 ) in the second to last steps of the pathway. COQ7 mutations lead to a primary CoQ 10 deficiency syndrome associated with a pleiotropic neurological disorder. This study shows the clinical, physiological, and molecular characterization of four new cases of CoQ 10 primary deficiency caused by five mutations in COQ7 , three of which have not yet been described, inducing mitochondrial dysfunction in all patients. However, the specific combination of the identified variants in each patient generated precise pathophysiological and molecular alterations in fibroblasts, which would explain the differential in vitro response to supplementation therapy. Our results suggest that COQ7 dysfunction could be caused by specific structural changes that affect the interaction with COQ9 required for the DMQ 10 presentation to COQ7, the substrate access to the active site, and the maintenance of the active site structure. Remarkably, patients' fibroblasts share transcriptional remodeling, supporting a modification of energy metabolism towards glycolysis, which could be an adaptive mechanism against CoQ 10 deficiency. However, transcriptional analysis of mitochondria‐associated pathways showed distinct and dramatic differences between patient fibroblasts, which correlated with the extent of pathophysiological and neurological alterations observed in the probands. Overall, this study suggests that the combination of precise genetic diagnostics and the availability of new structural models of human proteins could help explain the origin of phenotypic pleiotropy observed in some genetic diseases and the different responses to available therapies.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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