Biology:Mitochondrial complex II deficiency
Mitochondrial complex II deficiency, also called CII deficiency, is a rare mitochondrial disease. As of 2013, about thirty-six cases had been reported.[1]
Signs and symptoms
Mitochondrial complex II deficiency affects the body's mitochondria[2] and can have a variety of presentations. In some cases, the brain, heart, liver, kidneys, and muscles are affected, while in other cases, only the heart and muscles are affected with adult onset.[3] Common symptoms include the Babinski sign, muscle weakness, distal amyotrophy (muscle wasting of the limbs), developmental regression (loss of developmental milestones), and being easy to fatigue.[2]
Causes
CII deficiency is a genetic disorder with autosomal recessive inheritance,[3] meaning that a person must inherit a genetic mutation from each parent to be affected.[2]
Diagnosis
The most effective way to diagnose CII deficiency is by measuring the activity of complex II in the muscles.[3]
Prognosis
In more severe cases where multiple organ systems are affected, death can occur in early life due to multisystem failure.[1]
References
- ↑ 1.0 1.1 Sciacovelli, Marco; Schmidt, Christina; Maher, Eamonn R.; Frezza, Christian (2020). "Metabolic Drivers in Hereditary Cancer Syndromes". Annual Review of Cancer Biology 4: 77–97. doi:10.1146/annurev-cancerbio-030419-033612.
- ↑ 2.0 2.1 2.2 "Mitochondrial complex II deficiency". https://rarediseases.info.nih.gov/diseases/5053/mitochondrial-complex-ii-deficiency.
- ↑ 3.0 3.1 3.2 "MITOCHONDRIAL COMPLEX II DEFICIENCY". https://www.omim.org/entry/252011.
 |  |
