Articles tagged with Mitochondrial Dna
Salk Institute researchers have discovered a novel pathway that links chronic interferon II exposure to mitochondrial dysfunction, leading to immunosuppression and enhanced tumor growth. By blocking prostaglandin E2, they found a viable target to restore immune system function and combat immunotherapy resistance.
Researchers found that silencing POLG1 and POLG2 reduced mtDNA content, impaired mitochondrial function, and decreased stemness-related properties in breast cancer cells. POLG inhibition also suppressed colony formation and mammosphere growth, suggesting its potential as a therapeutic target and prognostic biomarker in breast cancer.
The study identified RTN4IP1 as a factor associated with poor prognosis in triple-negative breast cancer, promoting metastasis through NAD⁺ depletion and disrupting glycolysis and oxidative phosphorylation. RTN4IP1 interacts with AK4 to cause this metabolic disruption.
A study at USC discovers a common genetic variant in Indigenous American populations that silences the microprotein MENTSH, restoring it improves insulin signaling and blocks diet-induced weight gain. MENTSH-based therapies could offer a precision-medicine approach to Type 2 diabetes.
The study found associations between mitochondrial heteroplasmy and cardiometabolic parameters in patients with metabolic syndrome. Intermediate heteroplasmic mutations were associated with the degree of vascular stenosis and lipid metabolism parameters.
Salk Institute researchers have developed a new biological platform for studying mitochondrial DNA in human physiology, adaptation, and therapeutic development. The platform allows scientists to investigate mitochondrial DNA variation in health and disease, enabling therapeutic innovation for mitochondrial disorders.
Scientists discovered how tumors disable dendritic cell function by decreasing their mitochondrial fitness, leading to weakened immune defenses against cancer. Restoring mitochondrial function in dendritic cells improves antitumor immune responses and enhances immunotherapeutic efficacy.
Researchers identify 'mitochondrial pearling' as key process for maintaining uniform spacing of nucleoids in mitochondria. Pearling involves a transient transformation that helps redistribute mtDNA clusters, ensuring efficient energy production and preventing disease.
A new type of DNA damage, glutathionylated DNA adducts, accumulates at high levels in mitochondrial DNA, affecting energy production and stress response. The discovery sheds light on how cells sense and respond to stress, with potential implications for diseases like cancer and diabetes.
New research suggests that ocean turbulence and horizontal stirring will dramatically increase in the Arctic and Southern Oceans due to human-induced Global Warming. The study uses ultra-high-resolution simulations to investigate how mesoscale horizontal stirring (MHS) responds to warming, revealing a pronounced future intensification ...
Researchers have identified a cellular mechanism that transmits mitochondrial DNA mutations, which can cause serious and incurable diseases. A potential treatment is proposed to target the enzyme USP30, reducing the risk of mitochondrial disease transmission.
The congress brings together experts to explore mitochondria's role in cellular dynamics, metabolic control, and therapeutic targets. Key findings include the emergence of mitochondria as biological sensors and decision-makers, translating environmental signals into cellular fate.
The 17th World Congress on Targeting Mitochondria will gather world's leading experts from biotechnology, pharma and academia to discuss health, longevity and precision medicine. Over 150 academic and institutional partners and 30 industrial and investment organizations are participating.
Researchers at Thomas Jefferson University reconstructed transcription in human mitochondria, showing how the molecular machinery works and revealing potential drug targets. This breakthrough could guide new therapies for mitochondrial diseases, affecting one in 5,000 people worldwide.
A new multi-disciplinary approach reveals that some mitochondrial DNA mutations occur before a cell turns cancerous and can influence both leukemia onset and progression. The study also suggests that these mutations may contribute to therapy resistance, making leukemia cells more likely to resist treatment.
Researchers will explore the intersection of mitochondria and microbiota through extracellular vesicles for diagnostics, targeted drug delivery, and regenerative medicine. The conference aims to accelerate scientific progress by building bridges between disciplines.
Despite using a large genetic dataset, scientists were unable to find a definitive explanation for the formation of distinct great white shark populations in the southern Indo-Pacific Ocean. A study published in Proceedings of the National Academy of Sciences suggests that genetic divergence began around 7,000 years ago.
Researchers developed a chemical probe that binds to damaged mitochondrial DNA, blocking enzymatic processes that lead to its degradation. This approach lessens mtDNA loss, preserving energy production in vulnerable tissues. The new molecule successfully reduced inflammation and maintained functional DNA despite chemical tagging.
Researchers develop specialized enzymes to selectively increase or decrease specific mutation loads in mitochondria, allowing precise study of disease manifestation. This technology holds promise for treating patients with mitochondrial diseases by reducing mutant mtDNA load.
Researchers at the University of Gothenburg have discovered a molecule that helps more mitochondria function properly, improving energy production in cells from patients with POLG mutations. This breakthrough paves the way for a new treatment strategy and may have broader therapeutic use for other mitochondrial diseases.
This study found that aging impacts the gut microbiome composition and metabolites differently in male and female rats, influenced by biological sex and mitochondrial DNA. The researchers analyzed fecal samples from genetically diverse rats to assess bacterial changes with age, revealing more significant shifts in females.
Researchers at St. Jude Children's Research Hospital found that removing the 'signal jammer' protein VDAC2 can improve how tumors respond to immunotherapy. This breakthrough could lead to new ways to enhance immunotherapies and make them more effective in treating resistant cancers.
The review highlights the impact of mitochondrial DNA damage on cardiac health, emphasizing the importance of mtDNA replication, transcription, packaging, and repair. Restoring mtDNA integrity is proposed as a promising avenue for cardioprotective strategies using antioxidants, autophagy modulators, and epigenetic regulators.
A retrospective natural history study of 30 patients with single large-scale mitochondrial DNA deletion syndromes (SLSMD) reveals a broader clinical presentation than previously thought. The study identifies key molecular details, including a recurrent deleted region in the MT-ND5 gene and elevated levels of biomarker GDF-15.
Researchers discover mitochondrial transfer between cancer cells and immune cells as a key immune evasion strategy. Cancer cells can reshape the tumor microenvironment to weaken tumor-infiltrating lymphocytes, and mitochondria play a significant role in this process.
A systematic review of 24 studies suggests resveratrol can enhance the quantity and quality of egg cells, called oocytes. The compound may also treat infertility related to endometriosis and obesity.
A researcher at the Medical University of South Carolina is developing a new approach to boost the immune system's ability to detect and kill kidney tumors. By targeting mitochondrial DNA, he aims to reactivate the immune system to recognize and target cancer cells more effectively.
A recent study has identified 51 amyotrophic lateral sclerosis (ALS)-associated mutations in mitochondrial DNA that could help diagnose the disease. The mutations, which include 13 that increase the risk of ALS and 38 protective ones, were found to be significantly associated with an increased or decreased risk of developing the disease.
A national study found that genomic sequencing can diagnose mitochondrial disease in over half of patients, simplifying the diagnostic journey and sparing invasive testing. The study also identified factors that impact testing results, particularly among children.
Researchers found evidence of giraffe, human, oryx, waterbuck, wildebeest, zebra, and lion hairs in the lions' teeth. The study used genomics to identify prey species and confirmed that the 'man-eaters' were likely siblings.
A new study suggests that a hydrogen sulfide-generating molecule targeting mitochondria can significantly slow weight gain and reduce liver fat accumulation in mice. The treatment, AP39, inhibits key metabolic pathways associated with obesity and inflammation, offering a promising new option for treating metabolic diseases.
Scientists extracted DNA from ancient cheese samples found in Tarim Basin mummies, revealing a new origin for kefir cheese and shedding light on the evolution of probiotic bacteria. The study suggests that kefir culture has been maintained in Northwestern China since the Bronze Age.
A study from University of California San Diego reveals a direct association between inherited genetic variants in mitochondrial DNA and the severity of Gulf War illness. The findings support an emerging hypothesis that GWI is driven by mitochondrial dysfunction rather than inflammation.
A recent study discovered that mitochondria frequently insert their DNA into brain cell nuclei, which may contribute to early death. The research found that participants with more mitochondrial DNA insertions in their brain cells were more likely to die earlier than those with fewer insertions.
Researchers found Numt insertions arise spontaneously and accumulate in brain tissues during development or lifespan. These insertions are prevalent in the human brain and can be found in fibroblasts.
University of Queensland researchers identified two enzymes that regulate adenine methylation in mitochondrial DNA, which controls disease-causing mutations. Enhancing levels of this modification may slow disease progression and provide a new perspective on genetic and epigenetic factors in health and disease.
Targeting mitochondrial dysfunction and mtDNA mutations is a promising therapeutic strategy for HCC, with potential benefits including restored cellular metabolism and reduced cancer progression. Research has focused on pharmacological approaches to target the electron transport chain and AMPK-dependent pathways, offering novel treatme...
A genomic study uncovers germline ARID1B and mitochondrial variants that may drive pediatric chordoma genesis, a rare and aggressive bone tumor. The study found aberrant indels and haywire mitochondria in 22% of pediatric chordoma samples.
Researchers found that six Jamestown dogs contained Indigenous ancestry and were consumed by residents during a period of starvation. This discovery suggests complex forces at play between European colonists and Indigenous communities, revealing a more nuanced understanding of their relationship.
Researchers have determined the molecular level function of free-forming structures in plant cells that help sense light and temperature, enabling plants to distinguish a range of different light intensities. The formation of these organelles is not random but is linked to specific locations within the cell, particularly near centromeres.
The project aims to overcome limitations of conventional semen analyses by examining mitochondrial DNA levels in sperm as a novel biomarker of sperm fitness. Researchers will evaluate relationships between mtDNA biomarkers and male reproductive health using large study samples.
Researchers successfully identified the historical remains of George Washington's grandnephews and their mother using new DNA sequencing technologies. The study's findings will aid in identifying service members lost during past conflicts, including those from World War II.
Researchers question whether micronuclei activate the cGAS-STING pathway, a key innate immune response to foreign nucleic acids. The study found that MN more commonly recognizes DNA during cell division without triggering STING activation.
Researchers found that faulty mtDNA replication causes mitochondria to leak genetic material, triggering an immune response and leading to disease. By targeting this process, doctors may develop therapies to prevent harmful inflammation.
Researchers identified 10 new types of DNA polymerase involved in mitochondrial DNA maintenance, including rdxPolA, which is a direct descendant of the α-proteobacterial symbiont that gave rise to the first mitochondrion. The study provides critical insights into the early evolution of mitochondrial DNA maintenance machinery.
Researchers created novel gene editing enzymes with improved precision, reducing off-target RNA edits by over 99%. The technology has potential applications in treating mitochondrial genetic diseases and may lead to transformative treatments within the next five years.
Scientists identify chronic ER stress and mitochondrial damage in DM2 cells, triggering an antiviral response and autoimmune diseases. The study provides new therapeutic targets to suppress the development of autoimmune diseases in patients.
Researchers used underwater drones to collect eDNA from mesophotic corals, identifying genera and habitats. The study suggests faster and easier monitoring of coral reefs using eDNA metabarcoding methods.
Research published in ACS Environmental Science & Technology Letters reveals that exposure to pesticide-treated seeds can adversely affect earthworms' health. Earthworms exposed to non-lethal amounts of insecticides and fungicides showed poor weight gain and mitochondrial DNA damage.
Scientists discovered a novel mechanism for removing mtDNA from mitochondria, which can initiate an immune response promoting inflammation. The discovery reveals new targets for therapeutics to disrupt the inflammatory pathway and mitigate inflammation during aging and diseases.
Genetic analysis of bone fragments at the Ranis site in Germany confirms that modern humans reached Northwestern Europe 45,000 years ago, overlapping with Neanderthals. The findings suggest that the invasion of Europe by modern humans helped drive Neanderthals to extinction.
Researchers have discovered that tumours with mitochondrial DNA mutations are up to two and a half times more likely to respond to immunotherapy, opening a new avenue for improving cancer treatment. This finding could enable doctors to identify patients who would benefit most from immunotherapy before starting treatment.
The Taiwanese Leaf Litter Beetles Barcoding project has created a comprehensive reference library for these elusive beetles using DNA barcoding. The dataset comprises 4,629 beetles representing 334 species candidates from 36 families, unveiling taxonomic insights and enhancing our understanding of their biology and ecological roles.
A newly identified genetic mutation in a small protein provides significant protection against Parkinson's disease. The variant, SHLP2, is found primarily in people of European descent and reduces the risk of Parkinson's by twofold.
A new conservation tool, Lion Localizer, helps authorities track the origin of illegally traded lion parts by analyzing mitochondrial DNA. The tool provides critical information on population impact and resource allocation, supporting efforts to protect tiny West African lion populations.
Researchers found that SARS-CoV-2 alters mitochondria on a genetic level, leading to widespread 'energy outages' throughout the body and its major organs. This affects the heart, brain, and lungs, contributing to long COVID symptoms.
A new method extracts DNA from cat hair, linking suspects and crime scenes, with potential applications in dog cases too. Researchers found a single cat hair contains usable DNA, which can be sequenced for a more powerful link.
Researchers analyzed gut and skin microbiota in Shiba Inu dogs with atopic dermatitis, finding that treatment with Oclacitinib restored balance to the microbiome. The study suggests that microbes may serve as potential therapeutic targets for canine atopic dermatitis, offering new disease management strategies.
A novel procedure using a refined technique and narrower tube has reduced the risk of transmitting mitochondrial disease during assisted reproduction. The study found that the new protocol resulted in normal development of embryos and healthy offspring, with minimal transfer of maternal mitochondria to the offspring.
A significant breakthrough sheds light on Parkinson's disease mechanisms, revealing that mitochondrial DNA damage triggers the spread of debilitating symptoms. The researchers' findings offer promising potential for innovative treatments and diagnostics.