Articles tagged with Mitochondrial Dna
A new study has discovered a connection between a mitochondrial metabolite and the activation of an inflammatory response. Fumarate, produced in the mitochondrion, triggers mitochondrial damage that releases genetic material into small vesicles, leading to inflammation.
Scientists discovered a Pink-throated Brilliant hummingbird with gold throat feathers, which is actually a hybrid of two pink-throated species. The hybrid's unique coloration is explained by the complex interaction of genetic and structural factors that determine feather colors.
Deep-sea squat lobsters are reclassified after Harvard researchers discovered five new species, showing wider geographic distribution ranges and shallower genetic diversity. The discovery highlights the importance of molecular data in understanding evolutionary history.
The study found that the Erfurt Jewish community was more genetically diverse than modern-day Ashkenazi Jews, with at least two distinct groups. The research team discovered that the founder event, which makes all Ashkenazi Jews today descendants of a small population, happened before the 14th century.
Scientists have discovered how cells eliminate mutated mitochondrial DNA (mtDNA) using autophagy, a cellular waste disposal process. This mechanism prevents mitochondrial damage and preserves function.
ATAD3A is crucial for the movement of genetic material inside mitochondria, affecting energy production. The correct distribution of mtDNA nucleoids activates expression of respiratory chain complexes.
Scientists have discovered that mitochondrial DNA can insert itself into human nuclear DNA in every 4,000 births, leading to the development of rare diseases and some cancers. The new inserts can cause cancer and trigger its development in some cases.
A recent genetic study has found that three-quarters of the Early Medieval population in Eastern England was comprised of migrants originating from Continental regions bordering the North Sea. These migrants intermarried with local populations, but integration varied greatly from region to region.
A mutation in the SHMOOSE protein is associated with a 20-50% higher risk of Alzheimer's disease across four cohorts. The researchers suggest that targeting SHMOOSE may prove beneficial in neurodegenerative and other diseases of aging.
A team from the University of Tsukuba has developed a mouse model carrying a disease-associated mitochondrial mutation, which reveals that faulty RNA processing is responsible for metabolic disorders. The study provides new avenues for scientific discovery in understanding mitochondria and multiple diseases.
Researchers at CSU found that a gene called MSH1 helps keep plant mitochondrial genomes mutation-free, allowing for quick sorting of normal and diseased DNA. This process is more efficient in plants than in humans, where mutations are passed down through generations.
Researchers at NIH have developed a 3D structure of the twinkle protein, which helps identify mutations that cause mitochondrial diseases. The discovery could lead to targeted treatments for patients with conditions like progressive external ophthalmoplegia and Perrault syndrome.
Researchers found that DNMT3A and TET2 genes directly activate expression of a gene involved in mitochondrial inflammatory pathways. This activation leads to increased inflammation, which may exacerbate plaque buildup in atherosclerosis. Blocking these pathways could form the basis for new treatments.
Scientists at UC San Diego and Salk Institute discover link between mitochondrial function, inflammation, and DNMT3A and TET2 genes in atherosclerosis. Abnormal inflammatory signaling is triggered by low levels of these genes, leading to excessive plaque buildup.
Researchers describe biochemical pathway leading to inflammation characteristic of autoimmune diseases, including lupus and rheumatoid arthritis. FEN1 enzyme plays critical role in generating oxidized mtDNA fragments that trigger complex inflammatory response.
Genetic analysis of ancient individuals from remote Pacific islands yields findings on family structure, social customs, and ancestral populations. The study suggests that matrilocal population structures were the rule among the world's earliest seafarers, with women often remaining in their communities after marriage.
A study by Brazilian scientists reveals that autophagy can modulate the accumulation of mutant mitochondrial DNA in cells during aging. The researchers found that mice with liver-specific atg7 knockout showed reduced buildup of mutant DNA, suggesting a potential therapeutic target for diseases associated with mitochondrial DNA mutations.
A new study found that endurance exercise improves mitochondrial function in some patients with primary mitochondrial diseases, but not others. The research highlights the importance of considering individual genetic status when recommending exercise as therapy.
Eukaryotes emerged in an anoxic environment in the ocean, and their mitochondria-bearing cells likely resulted from a merger between archaea and bacteria. This finding contradicts the long-held view that oxygenation of Earth's surface environment led to eukaryogenesis.
Scientists have successfully developed a gene-editing platform called TALED that can perform A-to-G base conversion in mitochondria, the final missing piece of the puzzle in gene-editing technology. This breakthrough has significant implications for treating previously incurable genetic diseases caused by mutations in mitochondrial DNA.
Researchers at the University of Otago have developed a new method for obtaining ancient genomic data from small vertebrate remains, causing no visible damage to the underlying bone. The study presents a breakthrough in analyzing materials in museum collections and rare, valuable specimens.
A new CNIC study warns that mitochondrial therapeutic interventions can cause damage due to the mixing of mitochondrial DNAs from two distinct origins. This can lead to medium- and long-term health issues, including heart failure, pulmonary hypertension, and muscle loss.
Researchers identified a mechanism that helps explain how certain kinds of genetic disorders are transmitted from mother to child. The study showed that mutant mtDNA builds up in the final stages of egg formation and can impair mitochondrial function, leading to disease.
Scientists have discovered the orf137 gene responsible for male sterility in tomato plants, enabling the development of an efficient F1 hybrid breeding system. The study also demonstrates targeted mutagenesis and homologous recombination mechanisms underlying this trait.
Researchers found elevated plasma xanthine oxidase activity and more fragments of damaged mitochondrial DNA in Black adults with resistant hypertension compared to white adults. These findings suggest an important underlying cause of increased cardiovascular risk in Blacks with difficult-to-treat hypertension.
Scientists at the University of Cambridge have successfully modified the mitochondrial genome in live mice using gene-editing techniques, offering a promising approach to treat incurable mitochondrial disorders. The treatment aims to correct spelling mistakes in defective mitochondrial DNA, producing healthy mitochondria that allow cel...
A study of crayfish in the Current River watershed found that virile crayfish were interbreeding with native spothanded crayfish, potentially altering their genetics and ecology. The discovery highlights the challenges of detecting invasive species' impacts, which can lead to substantial harm to unique ecosystems.
A study compared four common DNA extraction methods and found that each method produced slightly different results due to varying 'how' factors. Researchers can now make informed decisions about their methods to optimize results.
Scientists at Kyoto University developed a chemical compound that can tag and remove mutant DNA sequences from mitochondria, potentially treating mitochondrial diseases. The approach overcomes existing problems with genetic material injection and antioxidant drugs.
A study of over 350,000 people found that genetic variants in mitochondrial DNA can increase the risk of type 2 diabetes, multiple sclerosis, and other diseases. Additionally, mitochondrial DNA influences characteristics such as height and lifespan. The study suggests complex interaction between mitochondrial and nuclear DNA.
Three manatee species share a common ancestor after the Amazon Basin was formed, with genetic data showing adaptation to environments influenced their evolution. The research adds new information on the evolutionary history of aquatic mammals, shedding light on how geological events shaped their distribution.
Researchers found that a shortage of DNA building blocks triggers an inflammatory response in cells when mitochondria release their genetic material. This link could lead to new treatments for various diseases associated with the mitochondrial genome and ageing process.
Researchers developed methods to recover, enrich and analyze archaic human nuclear DNA from cave sediments. This approach revealed new insights into Neanderthal population history, including a replacement event in northern Spain about 100,000 years ago.
A novel genetic mitochondrial disorder has been identified in seven patients with biallelic variants in the LIG3 gene. The mutation leads to reduced LIG3 protein levels, diminished ligase activity, and consequent deficits in mitochondrial DNA maintenance.
Researchers have found that platelets are the source of extracellular DNA in patients with lupus, leading to chronic inflammation. This discovery could lead to better understanding and treatment of the disease.
Scientists have developed a rapid blood test that can predict which COVID-19 patients are at highest risk of severe complications or death. The test measures mitochondrial DNA levels in the bloodstream, which is linked to cell death and inflammation.
Researchers have developed a simple, high-throughput method for transferring isolated mitochondria into mammalian cells, allowing for the study of mitochondrial DNA diseases and potential treatments. The new device, MitoPunch, enables the transfer of mitochondria into thousands of recipient cells simultaneously.
Researchers developed a compound that inhibits the growth of cancer cells by targeting mitochondrial function, without severe side effects. The compound prevents genetic information within mitochondria from being read, starving cancer cells into dying.
A long-term study of gene therapy in monkeys reveals no adverse health effects, bolstering the scientific basis for mitochondrial replacement therapy in human clinical trials. Researchers found varying levels of carryover maternal mitochondrial DNA, but it was not enough to cause health effects.
Researchers at UMass Amherst have identified a single-measure biomarker in sperm mitochondrial DNA that may predict male reproductive health and pregnancy success. Higher levels of this biomarker are associated with lower odds of cycle-specific pregnancy and 12-month fertility.
Seth Shipman, a Gladstone Institutes investigator, has received the NIH Director's New Innovator Award to develop innovative technologies to edit mitochondrial DNA. His research could lead to new treatments for diseases caused by mitochondrial DNA mutations.
Domestic horses probably did not originate in Anatolia, according to a new study of ancient horse remains. The researchers found that nonlocal genetic lineages appeared suddenly in about 2000 BCE, suggesting an origin in nearby Black Sea regions.
Researchers at Massachusetts General Hospital used single-cell analysis to uncover new details about mitochondrial diseases, including lower levels of disease-causing mutations in certain immune cells. This discovery could lead to improved diagnosis and monitoring of the diseases, as well as potential new therapeutic strategies.
Researchers identified mechanism of competition between distinct mitochondrial genomes in the same cell, which depends on impact on cell metabolism. The study found that factors like gene function, drugs, and dietary changes influence preference for specific mtDNA variants.
Research at The University of Tokyo found that influenza virus-infected macrophages release oxidized DNA, which activates the NLRP3 inflammasome and increases IL-1β secretion. Inhibition of mitochondrial reactive oxygen species decreased this secretion, providing a link between viral proteins and inflammasome activation.
A team at Broad Institute of MIT and Harvard developed a new molecular editor that can precisely edit mitochondrial DNA, enabling modeling of disease-associated mutations. The editor, engineered from a bacterial toxin, enables researchers to study genetic changes associated with cancer, aging, and more.
A new precision gene editor for mitochondrial DNA has been developed, allowing scientists to make targeted changes without the need for CRISPR technology. This breakthrough could enable researchers to study rare diseases and basic mitochondrial biology in animals.
Researchers have expanded the lion species' family tree through genetic analysis, revealing two main branches and shedding light on subspecies relationships. The study suggests that cave lions diverged from modern lions around 500,000 years ago, with some populations showing minimal interbreeding.
The Asian tiger mosquito has become more abundant in Illinois over the past three decades, spreading diseases like chikungunya and dengue fever. The mosquito's spread is linked to global trade, particularly with used tires, which provide a conducive environment for its eggs to develop.
A new mutation in the mt-Cyb gene of a mouse model for GRACILE syndrome drastically speeds up disease progression. The discovery provides a valuable tool for studying mitochondrial diseases and their function.
Researchers at INSERM have revealed that whole functioning extracellular mitochondria are present in the bloodstream, contradicting previous assumptions. The discovery has significant implications for our understanding of physiology and could lead to improvements in diagnosis and treatment of diseases.
Salk researchers found that mitochondria trigger molecular alarms when cells are stressed, which can lead to increased resistance to chemotherapy. This discovery may pave the way for new cancer treatments that target mitochondrial stress.
Researchers linked genetic variation in fruit fly mitochondrial genomes to changes in food intake, providing a new tool for studying human metabolic traits. The study used the Drosophila Genetic Reference Panel and identified specific haplotypes associated with increased food consumption.
Scientists identified a protein in fruit flies that can target mitochondria to reverse disease-causing mutations. This discovery may provide clues about treating human mitochondrial diseases, which currently have no cure. Researchers used three-parent flies to study the influence of nuclear DNA on mitochondrial genome competition.
Researchers have developed a new technique to study flagellate organisms, tiny eukaryotic creatures that provide clues about the emergence of complex life on Earth. By analyzing mitochondrial DNA and exploiting unique protein structures, scientists can fill in the gaps of the eukaryotic puzzle and better understand the history of life.
A study reveals how mitochondrial DNA is transmitted between generations, showing that a bottleneck occurs during oogenesis, reducing genetic diversity. This process can affect the inheritance of disease-related mutations, making it crucial for genetic counseling in women planning pregnancies.
A genetic study of ancient bone samples in Finland discovered separate populations during the Iron Age, influencing modern Finns' gene pool. The study found lineages typical of hunter-gatherers and European farmers coexisted in different regions.
A new online tool uses an interactive database of genetic information to help authorities quickly identify the origin of confiscated ivory from African elephants. The Loxodonta Localizer matches genetic sequences from poached ivory to those stored in the database, providing a faster and cheaper analysis than current approaches.
A new Finnish study published in Nature Metabolism challenges the long-held mitochondrial theory of aging by proposing that compromised nuclear DNA maintenance is responsible for accelerated aging. The study found that Mitutor mice, which harbor a defective polymerase-gamma enzyme, present with pronounced mtDNA mutagenesis and accelera...
Researchers defined the dynamics of mitochondrial DNA transfer from mothers to offspring, revealing control mechanisms to prevent heteroplasmy. The study helps devise strategies to prevent mitochondrial disease and unwanted results in medical interventions.