Articles tagged with Animal Anatomy
The CRISPR-Cas9 technology enables the rapid creation of transgenic mouse models in just three weeks, compared to six months, revolutionizing the study of diseases such as Huntington's and autism. Dr. Feng Zhang's groundbreaking research has made significant progress in deploying and refining this technique for therapeutic applications.
Researchers at the University of Pennsylvania have discovered a way to reactivate cardiac muscle cell proliferation in adult hearts, leading to reduced scar formation and improved heart function after injury. The approach involves using synthetic microRNAs with short half-lives to induce cardiomyocyte growth.
Researchers discovered that the heart of bluefin tuna adjusts its electrical activity and calcium cycling to maintain constant heartbeat despite temperature changes. This unique adaptation allows the fish to survive in cold waters, shedding light on how animals react to rapid environmental shifts.
Researchers at Children's Hospital Los Angeles found that neonatal mouse hearts can fully recover normal function after mild injury but fail to regenerate after severe injury. The study suggests that cardiac regeneration strategies should be tailored to the type and severity of heart injury.
Researchers have uncovered a critical role of the mitochondrial calcium uniporter (MCU) in regulating heart rate frequency. Blocking MCU function in mouse hearts reduced heart rate increases in response to stimuli, suggesting its importance in physiological heart rate regulation.
A new study found that bottlenose dolphins and Weddell seals experience cardiac arrhythmias during the deepest dives, with over 70% of deep dives affected. The conflicting signals to the heart from exercise-induced tachycardia and dive-induced bradycardia put the heart in an unsteady state.
Researchers at CNIO have developed a gene therapy that reactivates the telomerase gene only in the heart of adult mice, resulting in increased survival rates and regeneration of cardiomyocytes. This study provides proof-of-concept for treating chronic and acute heart failure and opens new avenues for age-related diseases.
A nearly complete 9,300-year-old frozen bison mummy was recently uncovered in Eastern Siberia. The Yukagir bison mummy has a preserved brain, heart, blood vessels, and digestive system, providing valuable insights into the biology of the species at the end of the Ice Age.
A new study by the Montreal Heart Institute found that high doses of fish oil supplements do not reduce atrial fibrillation, a common type of irregular heartbeat. The study also showed that fish oil supplements did not reduce inflammation or oxidative stress markers, which may explain their lack of efficacy.
Researchers at NYU Langone Medical Center have identified a protein known as Pcp4 as a regulator of the heart's rhythm in mouse models. Disruption of the Pcp4 gene leads to ventricular arrhythmias and increased mortality. The study suggests that targeting Pcp4 could lead to new treatments for arrhythmias.
Researchers discovered that naked mole rats maintain youthful heart function until age 90, offering insights into preventing debilitating cardiovascular disease. The rodents' natural habitat and stress resistance may hold the key to understanding these protective mechanisms.
Researchers at the Max Planck Institute of Molecular Cell Biology and Genetics have developed a method to capture detailed three-dimensional images of cardiac dynamics in zebrafish. By combining high-speed Selective Plane Illumination Microscopy and clever image processing, they reconstructed multi-view movie stacks of the beating heart.
Researchers have developed a minimally invasive gene therapy procedure that transforms ordinary heart muscle cells into specialized 'biological pacemaker' cells. This breakthrough could lead to a long-lasting treatment for patients with heart rhythm disorders, potentially eliminating the need for electronic pacemakers.
A new study has found that BPS, a common chemical substitute for BPA, can cause disruptions to female heart rhythms. The research suggests that BPS, like its BPA counterpart, interferes with hormone regulation and causes abnormal calcium handling in cardiac muscle cells.
Researchers found that heart muscle cells in mice undergo a brief proliferative burst prior to adolescence, increasing in number by about 40% to meet the body's growing needs. This discovery suggests that thyroid hormone therapy could stimulate this process, enhancing the heart's ability to regenerate in patients with heart disease.
New research by UT Southwestern Medical Center discovered that high levels of oxygen in the postnatal environment result in cell cycle arrest of cardiomyocytes, making it impossible for adult hearts to regenerate. The study's findings have significant implications for cardiovascular medicine and may lead to new therapeutic approaches.
The American Association of Anatomists announced its 2014 award winners, including Jeffrey Laitman for his work in human anatomy education and Drew Noden for his scientific achievements. The winners will receive medals, plaques, and honorariums, as well as opportunities to present lectures at the 2014 Annual Meeting at Experimental Bio...
A recent study published in Stem Cell Reports has found no evidence of complete heart regeneration in newborn mice after apex resection. The researchers, led by Ditte Andersen, were unable to replicate the findings of a previous 2011 study that suggested complete regeneration was possible.
Crude oil interferes with fish heart cells, causing slowed heart rate, reduced cardiac contractility, and irregular heartbeats. The study reveals that oil blocks potassium channels, increasing the time to restart the heart on every beat, ultimately slowing the heartbeat.
Fossil evidence reveals the step-by-step assembly of the face during the evolutionary transition from jawless to jawed vertebrates. The Romundina skull shows primitive and modern features, shedding light on the origin of the jawed vertebrate face.
Researchers discovered a modified pacemaker-like enzyme, GSK-3 beta, that mimics CRT's biological effects on heart muscle cells. This breakthrough could lead to new treatments for heart failure patients who don't qualify for traditional CRT therapy.
A recent study by University of Michigan researchers has found that sturgeon have evolved at an incredible rate in terms of body size, with some species reaching sizes comparable to those of Volkswagen vans. This discovery challenges the common perception of sturgeon as 'living fossils' and sheds new light on the evolutionary process.
A study reveals why Puerto Rican lizards don't rapidly extend their dewlaps like Jamaican cousins, instead using alternative strategies to enhance detection of displays. The research shows the island's species lacks physiology for rapid movement, relying on tailoring speed and duration of displays to match forest conditions.
Scientists have found that certain omega-3 and omega-6 fatty acids regulate the cardiac function of hibernating animals, ensuring a regular heartbeat. Hibernators show higher levels of these fatty acids in their heart tissue compared to non-hibernating animals.
Dr. Lawrence Witmer's Visible Interactive Dinosaur (VID) project aims to digitally recreate the tissues stripped away by time, creating the most realistic dinosaur renderings. The project has dual purpose of helping paleontologists and educating the public about physiology and anatomy.
A specific gene called Meis1 regulates the heart's ability to regenerate after injuries. The study found that deleting this gene extended the proliferation period in newborn mice and re-activated regeneration in adult mouse hearts without harming cardiac functions.
Researchers found that blocking an enzyme promoting inflammation can prevent cardiac tissue damage and fibrosis after a heart attack. The study's results show improved cardiac function and reduced inflammatory factors in mice treated with the compound.
UT Southwestern researchers identified microRNA miR-15 as a regulator of the heart's ability to regenerate, with potential therapeutic applications. By understanding this molecular mechanism, scientists may be able to control the heart's regenerative process and develop new treatments for cardiovascular disease.
Researchers have identified previously unseen anatomy preserved in fossils using synchrotron-based imaging techniques. The study reveals that a 50 million-year-old lizard skin contains teeth, changing the understanding of this fossil animal.
A team of researchers at Brigham and Women's Hospital used innovative technology to identify the origins of new cardiac cells. They found that these cells primarily arose from existing heart muscle cells, rather than stem cells, in a process that may be limited by age.
Recent research revealed mosquitoes possess surprisingly effective immune systems, destroying pathogens by utilizing the circulatory system's unique characteristics. A Vanderbilt study discovered a new mechanism for eliminating pathogens, increasing effectiveness in disease control strategies.
Scientists have developed a technology to visualize how circulating blood affects the developing heart, potentially uncovering triggers for heart defects. The study maps shear stress on the endothelial cells lining the growing heart, which has been linked to gene expression changes and defect formation.
A 520-million-year-old fossilized arthropod has revealed a remarkably well-preserved brain structure, challenging the long-standing debate on the origin of insects. The discovery suggests that complex brains evolved earlier than previously thought and have changed little over time.
A study published in Diabetes found that exercise benefits diabetic hearts by improving energy exchange and resisting oxidative stress. Fatty acids, previously thought to be detrimental, were shown to improve heart function when the heart needs to beat faster.
Researchers have identified a genetic variant in a cardiac protein that increases the risk of heart rhythm dysfunction and sudden death in patients with dilated cardiomyopathy. The variant, known as Ser96Ala, affects calcium regulation in heart cells, leading to arrhythmias and increased mortality.
A small number of cells in the embryo are enough to form the outer layer of pumping heart muscle in an adult zebrafish. The researchers discovered that only eight single cells contributed to forming a major type of heart muscle, and just one or two cells could create up to 70% of the entire ventricular surface.
Gladstone scientists have made a groundbreaking medical breakthrough in mice, transforming scar-forming cardiac cells into beating heart muscle. The research may have broad human-health implications and could provide an innovative alternative to heart transplants.
A new study published in The Anatomical Record reveals that some baleen whales have specialized fats associated with their jaws, similar to those found in toothed whales. This discovery sheds light on the auditory anatomy of these animals and challenges previous assumptions about their hearing systems.
Researchers found that hibernating woodchucks have a higher resistance to cardiac arrhythmias due to their unique calcium handling properties. This insight may suggest new strategies for protecting non-hibernating animals from fatal cardiac arrhythmias induced by hypothermic stresses and myocardial ischemia.
Researchers at the University at Buffalo have developed a new approach to regenerating heart muscle cells. By infusing cardiosphere-derived cells into coronary arteries, they were able to increase healthy heart muscle cells by 30% within a month.
Researchers found that scarring after a heart attack can help prevent further damage, but interrupting the process weakens heart function. The study suggests that timing is essential in manipulating cells to decrease scarring and enhance regeneration.
Biologists have identified two critical genes, DSCAM and COL6A2, responsible for congenital heart defects in individuals with Down syndrome. These genes disrupt cardiac development and function when produced at elevated levels. The study used a novel approach combining fruit flies and mice to untangle the problem.
Researchers identified three fatty acids involved in Burmese pythons' extreme heart growth after large meals. These fatty acids may trigger healthy physiological cardiac hypertrophy in diseased human hearts.
Researchers at Johns Hopkins Medicine found that a widely used pacemaker for heart failure works by raising regulator of G-protein-signaling proteins in the heart. This helps restore balance between two proteins, allowing the heart muscle to respond to hormones like adrenaline more effectively.
Researchers found that mice without the HDAC3 enzyme experience rapid thickening of the heart muscle and heart failure on a high-fat diet. This molecular link has implications for people on Western diets and combating heart disease.
Researchers at UCLA have found that adult human cardiac myocytes lose their ability to proliferate due to their primitive state being incompatible with proper heart function. This knowledge could lead to reprogramming a patient's own cardiac myocytes to replace damaged heart muscle, potentially revolutionizing treatments for heart cond...
The Gray's Anatomy for Students App is a clinically-oriented textbook for human anatomy, featuring over 1,000-color illustrations and various interactive features. The app provides access to the latest edition of Gray's Anatomy for Students, Second Edition, with updates from a team of authors and an international advisory board.
Researchers at U-M found that mutations caused by aging or disease can lead to a loss of cell identity, resulting in gene expression changes. This instability can have significant impacts on physiological functions, including arrhythmia in mice.
Researchers analyzed the heads of pachycephalosaur dinosaurs and compared them to modern animals that engage in head butting. They found that the bony anatomy of pachycephalosaur domes is better at protecting the brain than in any modern head-butting animal.
The European Society of Cardiology recommends redefining cardiac hypertrophy as myocardial remodelling to account for changes in non-myocyte cells and cell division. This change aims to improve communication among researchers and clinicians, leading to better risk stratification and treatment.
A 47 million-year-old lizard fossil has provided key findings on the evolutionary relationships between snakes and other reptiles. The study reveals that snakes evolved independently from limbless lizards, rather than sharing a common ancestry with burrowing reptiles.
Research suggests that a balanced diet with mono- and polyunsaturated fats can improve cardiac function in patients with heart failure. By providing sufficient energy to the heart, a damaged heart can maintain its normal metabolic profile and utilize its preferred energy source.
Researchers at UT Southwestern Medical Center discovered that newborn hearts can heal themselves completely. Within three weeks of removing a portion of the heart, it was able to grow back the lost tissue and function like a normal heart. This breakthrough offers new possibilities for treating heart disease.
Anthropologist Jane Desmond explores how Body Worlds exhibits tolerate the public display of human corpses, idealizing them as objects of scientific curiosity. The exhibitors promote the display as an advancement in anatomy studies, using de-emotional screens and depersonalization to create a universal experience.
A study by University of Illinois Chicago researchers found that certain strains of Listeria monocytogenes can invade the heart, leading to serious and difficult-to-treat cardiac infections. The bacteria display modified proteins that enable easier entry into cardiac cells, making them a new target for treatment.
Researchers at Sanford-Burnham Medical Research Institute have discovered a genetic mechanism that causes lipotoxic cardiomyopathy independently of a diet high in fat. The study found that an imbalance in cellular fats can lead to heart problems, and targeting the SREBP protein may help prevent these issues.
Researchers found Longevinex, a resveratrol supplement, provides cardio-protection across a wide dosage range without toxic effects. Unlike plain resveratrol, Longevinex exhibits an L-shaped safety curve, minimizing heart damage and optimizing protection.
Researchers are developing a robotic system that combines real-time magnetic resonance imaging (MRI) with a highly flexible robotic device to perform cardiothoracic surgeries on beating hearts. This minimally invasive approach aims to increase precision and reduce trauma, leading to faster recovery times.
Dr. Arjun Deb received the prestigious Louis N. and Arnold M. Katz Basic Science Research Prize for his groundbreaking research on Wnt1-mediated dynamic injury response in epicardium activation and mammalian cardiac repair. His work has significant implications for understanding adult stem cell biology and organ regeneration.
Researchers at the University of Cincinnati have identified a protein called HAX-1 that protects cardiac cells and muscle from damage during ischemia-reperfusion injury. The study found that HAX-1 levels were reduced in hearts after heart attack, but overproduction improved contractile performance and decreased cell death.