SUCLG1-related mitochondrial DNA depletion syndrome
עודכן לאחרונה 10 ספטמבר 2025
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SUCLG1-related mitochondrial DNA (mtDNA) depletion syndrome is an inherited disorder that affects the early development of the brain. Signs and symptoms typically appear soon after birth. Most affected children develop severe brain dysfunction and muscle weakness (encephalomyopathy). Infants with SUCLG1-related mtDNA depletion syndrome often have weak muscle tone (hypotonia). They typically have difficulty eating and may require a feeding tube. Additional features may include liver abnormalities and thickening of the heart muscle (hypertrophic cardiomyopathy). In affected individuals, a substance called methylmalonic acid typically builds up in the blood and urine.
תיאור
SUCLG1-related mitochondrial DNA (mtDNA) depletion syndrome is an inherited disorder that affects the early development of the brain. Signs and symptoms typically appear soon after birth. Most affected children develop severe brain dysfunction and muscle weakness (encephalomyopathy). Infants with SUCLG1-related mtDNA depletion syndrome often have weak muscle tone (hypotonia). They typically have difficulty eating and may require a feeding tube. Additional features may include liver abnormalities and thickening of the heart muscle (hypertrophic cardiomyopathy). In affected individuals, a substance called methylmalonic acid typically builds up in the blood and urine.
People with SUCLG1-related mtDNA depletion syndrome can have serious health complications, which result in a shortened lifespan. Individuals with SUCLG1-related mtDNA depletion syndrome typically do not survive past childhood.
Some infants with SUCLG1-related mtDNA depletion syndrome develop a toxic buildup of acids in the body in the first few days of life. This form of the disorder is called fatal infantile lactic acidosis. Infants with fatal infantile lactic acidosis typically only survive for a few days after birth.
Inheritance patterns
The source lists the following possible inheritance patterns: Autosomal recessive. More than one pattern can apply in different cases.
Related genes
Other names
Fatal infantile lactic acidosis with methylmalonic aciduria
Mitochondrial DNA depletion syndrome 9 (encephalomyopathic type with methylmalonic aciduria)
MTDPS9
Succinate-coenzyme A ligase deficiency
SUCLG1 deficiency
SUCLG1-related mitochondrial DNA depletion syndrome, encephalomyopathic form with methylmalonic aciduria
SUCLG1-related succinyl-CoA ligase deficiency
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קריאה נוספת והפניות
- SUCLG1-related mitochondrial DNA depletion syndrome; MedlinePlus, National Library of Medicine.
- Carrozzo R, Verrigni D, Rasmussen M, de Coo R, Amartino H, Bianchi M, Buhas D, Mesli S, Naess K, Born AP, Woldseth B, Prontera P, Batbayli M, Ravn K, Joensen F, Cordelli DM, Santorelli FM, Tulinius M, Darin N, Duno M, Jouvencel P, Burlina A, Stangoni G, Bertini E, Redonnet-Vernhet I, Wibrand F, Dionisi-Vici C, Uusimaa J, Vieira P, Osorio AN, McFarland R, Taylor RW, Holme E, Ostergaard E. Succinate-CoA ligase deficiency due to mutations in SUCLA2 and SUCLG1: phenotype and genotype correlations in 71 patients. J Inherit Metab Dis. 2016 Mar;39(2):243-52. doi: 10.1007/s10545-015-9894-9. Epub 2015 Oct 16.
- El-Hattab AW, Scaglia F. Mitochondrial DNA depletion syndromes: review and updates of genetic basis, manifestations, and therapeutic options. Neurotherapeutics. 2013 Apr;10(2):186-98. doi: 10.1007/s13311-013-0177-6.
- El-Hattab AW, Scaglia F. SUCLG1-Related Mitochondrial DNA Depletion Syndrome, Encephalomyopathic Form with Methylmalonic Aciduria. 2017 Mar 30. In: Adam MP, Bick S, Mirzaa GM, Wallace SE, Amemiya A, editors. GeneReviews(R) [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2026. Available from http://www.ncbi.nlm.nih.gov/books/NBK425223/
- Molaei Ramsheh S, Erfanian Omidvar M, Tabasinezhad M, Alipoor B, Salmani TA, Ghaedi H. SUCLG1 mutations and mitochondrial encephalomyopathy: a case study and review of the literature. Mol Biol Rep. 2020 Dec;47(12):9699-9714. doi: 10.1007/s11033-020-05999-y. Epub 2020 Nov 23.
- Ostergaard E, Christensen E, Kristensen E, Mogensen B, Duno M, Shoubridge EA, Wibrand F. Deficiency of the alpha subunit of succinate-coenzyme A ligase causes fatal infantile lactic acidosis with mitochondrial DNA depletion. Am J Hum Genet. 2007 Aug;81(2):383-7. doi: 10.1086/519222. Epub 2007 Jun 4.
- Ostergaard E, Schwartz M, Batbayli M, Christensen E, Hjalmarson O, Kollberg G, Holme E. A novel missense mutation in SUCLG1 associated with mitochondrial DNA depletion, encephalomyopathic form, with methylmalonic aciduria. Eur J Pediatr. 2010 Feb;169(2):201-5. doi: 10.1007/s00431-009-1007-z. Epub 2009 Jun 14.
- Spinazzola A, Invernizzi F, Carrara F, Lamantea E, Donati A, Dirocco M, Giordano I, Meznaric-Petrusa M, Baruffini E, Ferrero I, Zeviani M. Clinical and molecular features of mitochondrial DNA depletion syndromes. J Inherit Metab Dis. 2009 Apr;32(2):143-58. doi: 10.1007/s10545-008-1038-z. Epub 2008 Dec 27.
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