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Aminoglycosides can exacerbate weakness in patients with myasthenia gravis, and use is therefore avoided in these patients. [26] Aminoglycosides are contraindicated in patients with mitochondrial diseases as they may result in impaired mtDNA translation, which can lead to irreversible hearing loss, tinnitus, cardiac toxicity, and renal toxicity.
This results in two new mtDNA molecules. Each mitochondrion has several copies of the mtDNA molecule and the number of mtDNA molecules is a limiting factor in mitochondrial fission . After the mitochondrion has enough mtDNA, membrane area, and membrane proteins, it can undergo fission (very similar to that which bacteria use) to become two ...
An IVF technique known as mitochondrial donation or mitochondrial replacement therapy (MRT) results in offspring containing mtDNA from a donor female, and nuclear DNA from the mother and father. In the spindle transfer procedure, the nucleus of an egg is inserted into the cytoplasm of an egg from a donor female which has had its nucleus removed ...
Estimates of the mutation rate of human mitochondrial DNA (mtDNA) vary greatly depending on the available data and the method used for estimation. The two main methods of estimation, phylogeny-based methods and pedigree-based methods, have produced mutation rates that differ by almost an order of magnitude .
Circulating mitochondrial DNA, also called cell-free circulating mitochondrial DNA and circulating cell-free mitochondrial DNA (ccf mtDNA), are short sections of mitochondrial DNA (mtDNA) that are released by cells undergoing stress or other damaging or pathological events.
Based on MtDNA and Y-DNA, a person's haplogroup(s) can be identified. The mtDNA test can be taken by both males and females, because everyone inherits their mtDNA from their mother, as the mitochondrial DNA is located in the egg cell. However, a Y-DNA test can only be taken by a male, as only males have a Y-chromosome.
The MT-ND4 gene is located in human mitochondrial DNA from base pair 10,760 to 12,137. [5] [11] The MT-ND4 gene produces a 52 kDa protein composed of 459 amino acids.[12] [13] MT-ND4 is one of seven mitochondrial genes encoding subunits of the enzyme NADH dehydrogenase (ubiquinone), together with MT-ND1, MT-ND2, MT-ND3, MT-ND4L, MT-ND5, and MT-ND6.
When mitochondrial DNA sequencing is used for genealogical purposes, the results are often reported as differences from the revised CRS. The CRS is a reference sequence rather than a record of the earliest human mtDNA. A difference between a tested sample and the CRS may have arisen in the lineage of the CRS or in the lineage of the tested sample.