Articles tagged with Embryonic Stages
Researchers redesigned IVF needles to reduce fluid flow damage to eggs, improving oocyte collection and IVF success rates. The study uses computer models and mathematical simulations to optimize the design, which has been successfully tested in cattle, with plans for human trials.
Researchers created an immunodeficient mouse model of physiological ovarian aging, mirroring female fertility decline with age. The study found decreased oocyte quality, impaired follicle activation and growth, and increased mitochondrial dysfunctions in Old mice.
Researchers have made a breakthrough in studying species evolution by using robotic video microscopes and computer vision to measure embryo characteristics. The study found huge changes in an embryo's observable traits before and after developmental events, suggesting that measuring timings of development is just the tip of the iceberg.
Two parallel projects publish detailed cell atlases of the adult human brain and brain development, revealing over 3,000 cell types, including new insights into brain diseases and potential therapeutic targets. The freely available brain atlases will enable researchers to compare healthy brains with diseased ones.
Researchers tested five chemicals on zebrafish embryos and found that all caused impaired migration of bone-forming cells, leading to facial malformation. The study suggests a potential general mechanism underlying teratogenic chemicals and proposes using zebrafish as an alternative method for testing cross-species teratogens.
Researchers have documented the development of bonnethead sharks, showing how their skulls widen and distort to form a hammer-like shape. The study provides insight into the formation of this unique feature, which is thought to amplify their field of vision and ability to detect prey.
Researchers at the University of Helsinki and NIH found that the ectoderm retains its pluripotency during gastrulation, challenging previous understanding. This discovery sheds light on the chain of events in early embryonic development and has implications for neural crest stem cell potential.
Researchers compared transcriptomic profiles of human 8-cell-like cells and blastomeres to understand early human embryonic development. The study found that reprogrammed iBM cells showed the highest similarity to the 8-cell-stage embryo, while other 8CLCs were heterogeneous.
Using computational topology, Brown researchers have developed an algorithm that profiles shapes and spatial patterns in embryos, enabling the study of how cells assemble into tissue-like architectures. The new approach uses persistence images to rapidly compare large datasets, reducing computation time from hours to seconds.
The study reveals 15 distinct macrophage subtypes, including microglia-like cells and proangiogenic macrophages, which play critical roles in early tissue development. Macrophages were found to influence neural crest cell differentiation and contribute to vascular development during prenatal stages.
A US study found that increasing nest temperatures affects leatherback hatchling morphology, performance and hatching success. Mid-season nests had the highest hatching success and better physical performance.
Scientists have created chimeric embryos containing a combination of human and pig cells, which developed into structurally normal kidneys with 50-60% human cells. The researchers successfully grew humanized organs inside pigs, offering new possibilities for studying human development and developmental diseases.
A study published in Science of the Total Environment found that biofiltration increased coho salmon hatchling survival by up to 87%, reducing mortality from stormwater runoff exposure. The method effectively removes contaminants, but implementation faces hurdles due to land requirements.
A team of researchers compared the development of blood vessels in various animals, including mice, quails, and fish, to understand the origins of the human heart. They found that the structure of the human coronary arteries likely evolved from a common amniote ancestor, adapting to life on land.
Researchers found that C9ORF72 mutations impair neural stem cell renewal, leading to reduced brain regions during embryonic development. This impairment could contribute to disease symptoms later in life. The study used patient-derived nerve cells and laboratory mice to demonstrate the impact of C9ORF72 on neurodevelopment.
A group of biologists and ethicists suggest adding clarity to ongoing research using embryo models to refine the legal definition of human embryos. They propose a new definition that focuses on what an embryo can become rather than how it came to be, allowing for improved evaluation of models and potential future recognition as embryos.
Researchers from Leicester and Nottingham universities have received £600,000 funding to study sexual development and gene shuffling in the malaria parasite. The study aims to uncover new targets for therapies to control disease transmission.
Researchers at the University of São Paulo's Institute of Biosciences successfully developed blastoids from bovine pluripotent stem cells, creating an accessible in vitro model for studying embryogenesis. This breakthrough could lead to improved farm animal reproduction and enable breeding cattle with desirable characteristics.
Scientists have developed an innovative method to create 'peri-gastruloids,' human embryo-like structures with extraembryonic tissues, including yolk sac and placenta. This breakthrough allows researchers to study early human development stages, mimicking the formation of vital organs.
Researchers have identified a new factor influencing excess body weight in women, related to epigenetic marking of the POMC gene. The study found that women with an increased number of methyl groups attached to the gene are at a 44% higher risk of obesity.
A study by Gladstone Institutes researchers found that tight junctions between cells may play a critical role in gastrulation in human embryos. By suppressing tight junction formation, the team was able to create primordial germ cell-like cells, which are stem cells resembling human precursors of sperm and egg cells.
Researchers found a 30% higher likelihood of live births when eggs were collected in summer rather than autumn. They also discovered that bright sunshine on the day of egg collection increased the chances of a successful pregnancy.
Researchers at the University of Adelaide have created 3D holographic images of embryos to aid in selecting the best quality embryos for IVF, potentially improving success rates. The non-invasive approach uses miniscule amounts of light to provide insights into embryo development.
A groundbreaking model of human embryonic development has been created, offering a unique look at the molecular and cellular processes that occur during gastrulation stages. The model includes both embryonic and extraembryonic components, allowing researchers to study their interaction and potential new insights into pregnancy failures...
Researchers at the University of Cambridge have developed a stem cell-derived model of the human embryo, allowing for the experimental modeling of embryonic development during the second week of pregnancy. This breakthrough could help understand why and how pregnancies fail, and potentially lead to new treatments for genetic disorders.
A study found that prenatal phthalate exposure may lead to hormonal changes in females, affecting future fertility, but not males. The study suggests sex-dependent effects of phthalates on hormone levels during critical development periods.
A new study from the Stowers Institute for Medical Research reveals the placenta's polyploid cells play a vital role in supporting healthy embryonic development. The modified cell cycle controlling polyploidy is governed by the regulatory gene Myc, which supports DNA replication and prevents premature cellular aging.
Researchers at UNC School of Medicine identified molecular pathways critical for heart development, revealing that the mevalonate pathway regulates embryonic heart cell cycling and signaling molecules. This study provides a foundational data set to identify biological causes of congenital heart disease.
Researchers discovered that ZC3H11A is essential for regulating metabolic genes in embryos and their absence leads to complete lethality. The study's findings suggest that ZC3 may be a promising therapeutic target for the development of anti-viral agents against medically significant human viruses.
Researchers at Monash University have characterized a critical time in mammalian embryonic development using innovative imaging techniques. They discovered how the distribution of RNA subtypes determines what cells will become, with implications for regenerative medicine treatments.
The Chinmo gene plays a crucial role in establishing the juvenile stage in insects, promoting tissue growth during this stage. The study also reveals that the Chinmo, Br-C, and E93 genes coordinate the formation of adult organs through sequential action, which may hold key to understanding cancer processes.
Scientists have successfully mapped the landscape of m6A modification in mouse embryos, revealing intriguing patterns of gene activity and distribution in transposable elements. This study fills a gap in the transcriptome field, providing new insights into the function of m6A during development.
A team of investigators created embryo-like structures from monkey embryonic stem cells and transferred them into female monkeys, which implanted and elicited a hormonal response similar to pregnancy. The study provides new tools and perspectives for exploring primate embryos and reproductive medical health.
A specialized mRNA translation circuit controlled by protein RBPMS determines the competence for heart formation in human embryonic development. The study provides a better understanding of human cardiac development and reveals potential molecular targets for therapeutic interventions.
Scientists have developed a new microscopy method that allows for non-invasive observation of mechanical properties in developing embryos. The line-scanning Brillouin microscopy (LSBM) technique provides faster imaging, reduced light-induced damage, and simultaneous visualization of biomolecules.
Researchers have found that embryos in pregnancies ending in miscarriage take four days longer to develop in the womb than those in live births. This delay is associated with a higher likelihood of miscarriage and may be used to estimate pregnancy outcomes.
A study published in The FASEB Journal suggests that feeding pregnant mothers a combination of four nutrients before and during pregnancy can reduce the incidence and severity of fetal alcohol spectrum disorders. These nutrients include folic acid, choline, betaine, and vitamin B12.
Researchers have identified a molecular finger that switches on genes in one-cell embryos, revealing a potential link to cancer. The discovery sheds light on the mechanisms regulating embryonic development and may lead to new insights into cancer detection.
Researchers uncover mechanism explaining how embryos form larvae or miniature adults, correlating gene activation timing with life cycle evolution.
Researchers discovered poly(A)-tail-mediated remodeling of maternal mRNA during the oocyte-to-embryo transition, involving partial degradation and re-polyadenylation. This process is essential for human embryo development, as blocked re-polyadenylation leads to failed first embryo cleavage.
A multidisciplinary team of UC students developed a new understanding of spinal column formation and reengineered the process in mutant zebrafish. This breakthrough could lead to possible treatments for scoliosis in humans.
Researchers identified the molecular mechanism underlying Weiss-Kruszka syndrome, a rare neurodevelopmental disorder characterized by craniofacial anomalies and autistic features. The study reveals that the ZFP462 gene mutation leads to a failure to safeguard neural lineage specification during early embryonic development.
Researchers found that early prenatal alcohol exposure changes gene function and epigenome in placenta and human embryonic stem cells. These changes are associated with altered DNA methylation patterns, particularly in genes linked to nervous system development, such as DPPA4 and FOXP2.
Researchers at UNSW Sydney have successfully induced a gastrulation-like event in human pluripotent stem cells, mimicking the early stages of embryonic development. This breakthrough could lead to new approaches for studying human development and creating personalized body tissue or organs using hydrogel materials.
Researchers found that sea urchin larvae exposed to high levels of plastic pollution developed significant developmental abnormalities, including malformation of the skeleton and immune cells. The study reveals how newly made PVC pellets and beach-collected fragments cause harm to the embryos.
Scientists at IRB Barcelona have detailed the atomic scale mechanism of action for FoxH1, a key transcription factor in embryonic development and cancer. The study reveals an unusual binding mechanism to compacted DNA, shedding light on its role in disease progression.
Researchers at Uppsala University have discovered a crucial DNA sequence in jawed vertebrates that plays a major role in shaping the joint surfaces during embryonic development. This finding has significant implications for understanding the evolution of vertebrate jaws, which is believed to have occurred around 423 million years ago.
Researchers have discovered a new critical period for sex determination in sea turtle embryos, influenced by temperature fluctuations. The study reveals two peaks in temperature's impact on sex ratio during the thermosensitive period of development.
Researchers have developed a model of how human embryos are formed, revealing that genes are switched on almost immediately after fertilization. This discovery may also shed light on the origins of cancer, which is often diagnosed at an advanced stage.
A study published in Science finds that gut rotation is regulated by two waves of Pitx2 expression, triggered by mechanical cues and a latent TGF-beta sensor. This discovery sheds light on the mechanisms of organ formation and has implications for understanding birth defects such as intestinal malrotation.
Research at Kumamoto University reveals that fetal liver blood cells are stem cell-independent, contrary to the long-held view that HSCs are essential for their production. The study provides new insights into the origin of HSCs and suggests a reconsideration of their role in embryo formation.
Researchers have developed a mouse embryo model using only embryonic stem cells, achieving a high level of developmental stages including beating hearts and brain formation. This advancement opens up new avenues for understanding human pregnancy loss and developing organs in culture.
Researchers at KU Leuven have developed a new model of human extraembryonic mesoderm cells, which closely resemble their natural counterparts in early embryos. This breakthrough enables scientists to study processes previously inaccessible during development.
Researchers at the University of Cambridge have successfully grown a model embryo with a brain, beating heart, and all other organs using mouse stem cells. This breakthrough could help understand why some pregnancies fail and develop a new approach for repairing synthetic human organs.
Researchers have developed a model mouse embryo that has beating hearts, foundations for a brain, and all the organs in a mouse body. This breakthrough could help understand why some embryos fail and provide insights into repairing synthetic human organs.
Researchers found that Marchantia liverworts completely inactivate paternal genes in embryos, ensuring proper development. The mechanism involves Polycomb Repressive Complex 2 and maintains haploid dosage despite the short diploid phase.
Researchers have grown synthetic mouse embryo models from stem cells without fertilized eggs, opening new avenues for studying organ development and potentially producing transplantable tissues. The method shows promise in overcoming technical and ethical issues associated with natural embryo use.
Researchers have mapped multi-gene activity hotspots in developing mouse embryos, providing a detailed resource for assessing how key genes control tissue differentiation. The study reveals 'hot spots' where many genes are turned on together, guiding development and previously invisible signalling centres.
In embryonic stages, tactile stimuli simultaneously activate tactile and visual neural pathways. Shortly after birth, the superior colliculus separates these pathways, allowing separate processing of touch and vision.
A new study reveals that four living amphibian clades, including the dominant Plethodontidae family of lungless salamanders, develop lungs as embryos but lose them as adults. This finding sheds light on the evolution of lung loss over millions of years and suggests that losing lungs may have enabled their remarkable evolutionary success.