Understanding Mitochondrial DNA in Brain Tumorigenesis

Complex II ambiguities—FADH2 in the electron transfer system

“…As a consequence, the prosthetic group FADH 2 appears erroneously as the substrate of CII in the ETS linked to succinate oxidation. This error is widely propagated in publications found from 2001 to 2023 ( 4 , 23 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 , 112 , 113 , 114 , 115 …”

“… CII e-input errors Ref. NADH → NAD + + H + ( 45 , 97 , 99 ) FADH 2 → FAD ( 4 , 23 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , ...…”

“…FADH 2 is depicted as (1) product and (2) substrate of Complex II by ( A ) ( 4 ), ( B ) ( 80 ), as in ref. ( 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 , 89 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 104 , 192 , 193 , 194 , 199 , 201 , 202 , 203 , 204 ,…”

Insights regarding mitochondrial DNA copy number alterations in human cancer (Review)

“…However, due to the highly polymorphic nature of mtDNA, a mixture of wild-type and mutant mtDNA coexist within the same cell, termed heteroplasmy. This discrepancy could be attributed to numerous somatic mtDNA mutations typically caused by oxidative stress, high ROS exposure, replication errors, and aging ( 26 ). Heteroplasmy threshold occurs when the frequency of heteroplasmy attains 60–90% of mutant mtDNA and reflects the human mitochondrial pathology ( 6 , 27 ).…”