Articles tagged with Tissue Samples
Researchers discovered two distinct subspecies of short-finned pilot whales in the Indian and Pacific Oceans, separated by the eastern Pacific Ocean. The study, published in Molecular Ecology, used genetic analysis to verify the findings, revealing that continents may not have been as significant a barrier to this species' evolution.
Scientists have found that sponges can collect and filter DNA from fish, seal, and penguin DNA in the water they filter, making them an ideal sampling unit for monitoring biodiversity. This method uses sponge tissue as a natural sampler, reducing processing time and risk of contamination.
The study evaluated four chemical fixatives, including diisocyanate, carbodiimide, epoxy compound, and genipin, on bovine pericardium biomeshes. The results showed that three of the four tested agents significantly increased the resistance of biomeshes to collagenase.
A study at Children's National Hospital has successfully cryopreserved testicular tissue from 189 males, offering a potential fertility preservation option for younger boys. The research found undifferentiated spermatogonia in the testicular tissues of patients who had not yet received an ablative dose of therapy.
Researchers have identified 18 unique cell populations in RA joint tissue, including a fibroblast subset that produces pro-inflammatory cytokine interleukin-6. COX inhibitors like NSAIDs also alter these macrophages, but not TNF responses, suggesting new treatment approaches may be needed.
Researchers from Case Western Reserve University have developed an open-source quality-control tool to assess the quality of digital tissue slides. The tool, called Histo-QC, incorporates measurements and classifiers to flag corrupted images and retain high-quality slides for analysis by computers.
Researchers from Martin-Luther-University Halle-Wittenberg examined ancient textile samples from China and Peru and discovered the use of natural dyes dating back over 2,000 years. The new method allows for the detection of dye compositions without destroying the patterns.
A new study reveals that a specific type of immune cell, known as T7 and T8 cells, are responsible for inflammation in eosinophilic esophagitis. The study's findings also raise questions about the safety of a popular dietary supplement called butyrate, which may exacerbate the condition.
Researchers analyzed over 76,000 gene expression measurements from mouse and human spinal cord tissue samples to gain new insights into ALS progression. The study found that microglia exhibit dysfunction before symptom onset and that certain genes are expressed at higher levels in affected regions.
Researchers developed a new technique to measure plant biochemical responses using small tissue samples, reducing the need for large sample sizes and increasing experimental efficiency. This approach allows for more nuanced and high-resolution understanding of plant defense mechanisms.
Researchers successfully froze and thawed testicular tissue from young monkeys, resulting in live births after implanting the frozen tissue back into the animals. The study demonstrates a promising approach for preserving fertility in childhood cancer patients.
A new study published in PLOS ONE has found that parrots in San Francisco's Telegraph Hill are being poisoned by bromethalin, a common rat poison. The research team detected the toxin in brain, liver, and fecal samples of affected birds, suggesting they may be ingesting a sublethal dose.
Researchers have developed a new tool called URSA(HD) that analyzes gene patterns to reveal molecular causes of diseases. The tool has already uncovered previously unknown contributions of four genes to a rare form of cancer primarily affecting babies and young children.
A team of researchers from the University of Illinois has discovered that a giant sloth found in Belize, which lived around 27,000 years ago, had a diverse diet that shifted between wet and dry seasons. The study reveals that the creature adapted to its environment by relying on plants more available during dry periods.
A study of 1,625 brain tissue samples found Hispanic-American patients with Alzheimer's disease lived an average of 12 years from symptom onset, compared to 9 and 8 years for non-Hispanic whites and African-Americans. The research also identified subtle differences in the severity of Alzheimer's-related protein clumps among ethnoracial...
Researchers found high levels of persistent organic pollutants (POPs) in the fur of 15 animals, including musk deer and leopard cats. The study highlights increasing global environmental contamination by POPs compounds, which pose risks to human and animal health.
Researchers at PSI develop a new method that uses a small but efficient lens to create high-resolution images of X-ray microscopes, providing absorption and phase contrast information. This technique has the potential to reveal material properties and improve image quality for biological samples.
Cell lines, created from donated tissue samples, require unique considerations when creating research protections due to their value and expertise involved. The new Common Rule may pose unintended consequences for this resource, potentially disrupting scientific progress in cancer research.
Researchers developed a new skin test to detect prion infections before symptoms appear, using RT-QuIC and sPMCA methods. The study demonstrates the preclinical utility of skin samples in detecting prions, which could serve as a biomarker for early diagnosis.
Scientists have developed a new imaging technique that allows for rapid and detailed scanning of entire brains at the nanoscale. This breakthrough method, combined with the lattice light-sheet microscope, enables visualization of any desired protein and has the potential to revolutionize neuroscience research.
A new health check has been developed to discover the diets, migrations, and conservation needs of whale sharks. The research revealed that some whale sharks may have gone weeks or months without eating, and surprisingly, all tested showed signs of eating plants and algae.
Russian scientists developed a new method to study biomechanical changes in tissues after laser surgery, improving the accuracy and safety of eye surgeries. The method uses optical coherence tomography (OCT), which visualizes tissue structure by infrared light scattering, to quantify mechanical properties changes before and after laser...
Researchers propose a support vector machine-based method to predict enhancers on multiple cell lines and tissues, achieving better performance than state-of-the-art methods. The findings indicate that predicting enhancers is easier for adult or young tissue samples compared to fetal samples.
Researchers have developed an ultrasensitive test that detects tau protein clusters, which are associated with Alzheimer's disease and chronic traumatic encephalopathy. The test has been shown to detect the protein in small amounts of brain tissue, making it a major advance for early diagnosis.
Researchers at Johns Hopkins Medicine developed EXoO, a new molecular tool that decodes where specific sugars are attached to proteins. The study successfully identified new markers for cancers and other diseases by mapping O-glycan sites on human blood, tumors, and immune cells.
A team of scientists conducted over 2,000 surveys of chirping frog calls to define the Atlantic Coast leopard frog's range and characteristics. The study resulted in the first field-verified range map for the species, living primarily in coastal plains from Connecticut to northern North Carolina.
Researchers found that yelloweye rockfish have difficulty removing toxic mercury from sensitive liver cells, which can cause damage. The study highlights the potential risks of contaminants on this threatened species, with conservation efforts underway to protect them.
Researchers at Yale University discovered chemicals that preserve dinosaur soft tissues under specific conditions, such as oxidative environments. These preserved structures are comparable to Advanced Glycoxidation and Lipoxidation end products (AGEs and ALEs), which are resistant to decay and degradation.
The Lyme Disease Biobank now accepts tissue donations from patients undergoing knee-replacements and similar surgeries, as well as patients who die with Lyme disease. Researchers aim to explore the ability of Lyme bacteria to invade tissues and organs, leading to medical breakthroughs in diagnosis and treatment.
A new class of polymer matrices has been developed to improve the detection of metabolites and track chemicals of interest in studying cancer. This breakthrough enables researchers to explore more research questions and increases the flexibility of the MALDI imaging technique.
A team of scientists from UC Santa Barbara and USGS used eDNA to detect the presence of white sharks in local waters, providing clues for lifeguards and helping monitor the species' recovery. The study's success could lead to real-time monitoring and better understanding of marine biodiversity.
A study published in Current Bioinformatics found that predicting enhancers in adult tissues is more accurate than in fetal stages. The researchers used support vector machines to analyze DNA sequences and histone modifications, achieving good performance on most cell lines and tissues, especially for heart and lung tissues.
Scientists have developed a method to investigate all proteins in tissue samples that are modified by ADP-ribosylation, a stress response pathway. This allows for conclusions to be drawn about activated signaling pathways and potentially leads to new diagnostic and therapeutic possibilities for cancer and other diseases.
Levels of some persistent organic pollutants (POPs) regulated by the Stockholm Convention are decreasing in the Arctic, according to an international team of researchers. The biggest decreases were in a byproduct of the pesticide lindane and PCBs, with mean annual declines of 9% and 4% per year across the Arctic region.
Genital warts may increase the risk of HIV transmission if left untreated. Researchers found a higher density of HIV-target cells on anogenital warts, suggesting these lesions can be highly susceptible to infection.
A $318,696 NSF award will support the development of a novel biosensing nanotechnology to visualize trace biomarker proteins under a microscope. This technology has the potential to greatly advance protein sensing, enabling accurate diagnoses based on biopsies and improving basic biomedical research.
The Iterative Indirect Immunofluorescence Imaging (4i) technique refines standard immunofluorescence imaging by visualizing up to 40 proteins in a single cell. A new computer program, Multiplexed Protein Maps, analyzes the data and generates maps of protein distribution, providing a systematic survey of cellular organization.
Scientists at IBS report a breakthrough using heavy water (D2O) to delay sample damage in transmission electron microscopy. The approach allows for longer observation of molecule movements, enabling study of the nanoworld.
Researchers found that treatments for cancer and sickle cell disease can destroy germ cells in the testes of young boys, leading to complete depletion of spermatogonia. The study suggests that freezing testicular tissue before treatment may be a viable option to preserve fertility.
Researchers developed a 3D super-resolution nanoscope that provides unprecedented detail of brain molecules, shedding light on Alzheimer's disease progression. The instrument helped understand the structure of amyloid plaques, pinpointing their characteristics responsible for damage, and revealed their interactions with surrounding cells.
Researchers found that even mild COPD patients have lost over 40% of their small airways, suggesting early intervention is crucial. The study's findings could lead to the development of new drugs to treat patients with COPD at earlier stages.
A new study examines the effect of HPV vaccine on a population level, finding a significant reduction in severe dysplasia. The vaccine has been shown to work effectively in reducing cervical cancer risk, with a 40% lower incidence rate compared to unvaccinated women.
Scientists have developed a method to track biological samples using RFID chips, which can withstand extreme conditions and identify organoids grown from stem cells. This technology has the potential to advance drug testing and transplantation by providing real-time data on organoid health.
Researchers analyzed blood and tissue samples from kidney transplant recipients to understand how immunosuppressive drug tacrolimus works. They found that it reduces the number of T follicular helper cells, a key player in antibody production.
A new study from Karolinska Institutet suggests that individuals with inefficient fat metabolism are more likely to develop overweight and type 2 diabetes. The research found that women who were able to efficiently break down fat in their cells had a lower risk of weight gain and impaired glucose metabolism.
A team of researchers from Ruhr-University Bochum has discovered an olfactory receptor in human bladder tissue that may prove useful for bladder cancer therapy and diagnosis. The receptor, OR10H1, responds to sandalwood scents and inhibits tumour growth when activated.
Researchers identified dysregulation of the gene NEUROG2 as a key factor in the development of focal cortical dysplasia, a common cause of drug-resistant epilepsy. The study found that overexpression of NEUROG2 was linked to reduced expression of microRNA hsa-miR-34a, leading to nerve cell differentiation failure.
Brazilian researchers use human tissue samples from victims of the Hiroshima bombing to measure radiation dose absorbed by bones. The study confirms the feasibility of this method and opens up possibilities for future research, clarifying details of the nuclear attack.
Researchers identified key molecular drivers in calcific aortic valve disease, including cells from the lamina fibrosa layer with high propensity to calcify. A precise omics-level molecular atlas of the aortic valve reveals potential therapeutic targets for developing pharmacological therapy.
Researchers at IRB Barcelona have found covalently linked beta-amyloid dimers in the brains of patients with Alzheimer's disease. These dimers are preserved during tissue extraction and could serve as new biomarkers for early detection.
A recent study analyzing breast tissue from 344 transmen found benign and malignant lesions in 48.3% of individuals. Invasive breast cancer was detected in just two samples, emphasizing the importance of thorough histopathological examination.
Researchers created a synthetic material that mimics the active camouflage of a chameleon's skin, changing its color and stiffness in response to mechanical stimuli. The material has potential applications in medicine, particularly in the manufacture of biological implants.
Researchers at the University of Washington have developed a new method called SPLiT-seq that allows them to classify and track the multitude of cells in a tissue sample. Using this approach, they can measure gene activity in individual cells, even if there are hundreds of thousands of different cells in a tissue sample.
Researchers at Lund University have developed a new method that extends the viability of donated brain tissue from people with epilepsy to 48 hours. This allows them to study gene therapy treatment and acquire more data from a small number of patients, bringing treatments closer to the patient without direct testing.
Researchers discovered that gut bacteria play a role in brain impairment after sepsis, with certain strains associated with neuroinflammation and cognitive difficulties. The study suggests treating gut bacteria may help reduce long-term effects of critical illness.
A new research project aims to determine why mine dust-related lung diseases are increasing in prevalence among coal workers. The study will use a multidisciplinary approach to examine the relationship between mine dust exposures and severe lung disease, with a focus on identifying critical risk factors.
An international team of scientists developed models to predict post-mortem interval based on tissue-specific gene expression changes. Changes in gene expression can be used to determine the time of death with considerable accuracy, potentially aiding forensic analyses.
A study found that Ebola virus infects reproductive organs of macaques, suggesting similar infection in humans. The virus can persist in female reproductive tissues and may reach seminal fluid in men.
A Salk Institute study has discovered that nearly 80 percent of genes exhibit daily fluctuations, with the most rhythmic genes peaking in early morning and late afternoon. This finding has significant implications for understanding circadian disruption's impact on diseases such as depression and heart disease.
The Tomato Expression Atlas provides a comprehensive map of gene expression across all tissues and developmental stages of the tomato fruit. This database offers unprecedented spatiotemporal resolution and interactivity, enabling researchers to investigate biological processes important for fruit development.