Articles tagged with Embryonic Stages
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Researchers confirm swamp wallabies ovulate and mate while carrying a full-term fetus, creating a unique reproductive strategy that supports continuous embryo development. This phenomenon allows the female to be pregnant throughout her reproductive life, exceeding the duration of the oestrous cycle.
Researchers at the University of Basel have discovered that chromosomes reorganize into a barbell-like structure during early embryonic development in nematodes. This arrangement is crucial for cell maturation and prevents developmental disorders.
Researchers have created a new stem-cell model that can grow somites, the blocks of tissue that form vertebrae and muscles in embryos. This model, called gastruloids, has been developed to study complex processes in embryonic development and may enable testing of new drugs for developmental defects.
A new live-imaging technique reveals the key role of Hes7 in regulating the segmentation clock, a process that governs vertebrae formation. The study also highlights the importance of timing in intercellular communication for normal development.
A new function for glycine receptors during embryonic development has been identified through collaborative research at Max Planck Florida Institute for Neuroscience. The study found that glycine receptor alpha-4 facilitates the early development of fertilized eggs, maintaining embryo quality and litter size in mice.
Researchers discovered fossils of Caveasphaera, 609 million-year-old single-celled relatives of animals, revealing evidence that animal-like embryonic development evolved before complex animals appeared in the fossil record.
A new study reveals that animal-like embryos existed 609 million years ago, long before the emergence of definitive animals. The research found that Caveasphaera fossils displayed stages of development similar to those seen in living animals, including humans.
Researchers have identified a key difference between SMAD2 and SMAD3, revealing that SMAD2 binds to DNA and activates gene expression. This finding refutes the theory that SMAD2 does not bind to DNA.
Researchers studied histone modifications in zebrafish development, finding that H3K27 acetylation awakens the genome for transcription. This epigenetic factor determines gene function and is conserved across species, including mammals.
A CNRS research team found that a sequence of reflexive contractions drives embryonic development, accelerating it by up to 20 times. By artificially recreating this process and applying low-intensity electrical shocks, the scientists triggered hindlimb formation.
Researchers discovered that folic acid supplementation can mitigate the risk of dolutegravir triggering neural tube defects in an animal model. Folate receptor interactions with folate and dolutegravir also disrupt normal neural tube development.
A Penn study found that cell size controls the timing of genome activation in zygotes, shifting control from maternal molecules to individual cells. This discovery has significant implications for understanding early embryo development and may impact research approaches.
Yale scientists identify two proteins P300 and Brd4 as essential for activating the zebrafish genome after fertilization, allowing embryonic development to proceed. The discovery provides new insights into how life begins at a molecular level.
Researchers at Oregon Health & Science University found that mosaic embryos can adapt to abnormalities and persist in development, resulting in positive IVF outcomes. Mosaic embryos, which contain both normal and abnormal cells, were previously considered non-ideal candidates for IVF transfer due to the risk of aneuploidy.
Researchers at the University of Cambridge have generated a comprehensive molecular map of gastrulation in mice, revealing the genetic activity of over 100,000 embryonic cells. This discovery provides critical information on how mammalian embryos develop during gastrulation and paves the way for new understanding of organ formation.
A study published in Nature reveals that gut tube formation is driven by collective cell movements of the endoderm, triggered by a molecular gradient converted into a force gradient. This process coordinates cells to form a hollow tube structure crucial for respiratory and gastrointestinal tract development.
Researchers have developed EmbryoPhenomics, a technology that captures detailed measurements of organism development, revealing sensitive responses to environmental stressors. The technology has the potential to be a game-changer in assessing climate change impacts and preserving biodiversity.
Researchers discovered vitamin D is essential for embryonic development and dormancy in fish, a trait conserved across species. This finding could lead to better understanding of dormancy mechanisms and their applications in human health.
Scientists in EMBL's De Renzis group use optogenetics to steer the shape transitions of embryonic tissues, controlling a crucial step in development. This technique allows them to inhibit abnormalities and provide new insights into tissue invagination.
The article examines the role of selective serotonin reuptake inhibitors (SSRIs) in increased risk of gestational malformations. SSRIs can disrupt embryonic development by affecting serotonin levels and ion channel activity, highlighting the importance of serotonin in normal embryonic development.
Researchers have developed artificial pseudo-embryos from mouse stem cells that display characteristics of early embryonic development, including the formation of antero-posterior, dorso-ventral, and medio-lateral axes. These structures, called gastruloids, could complement animal embryos in studying mammalian embryonic development.
A team of scientists has uncovered a previously undescribed geometric shape, the scutoid, adopted by epithelial cells during embryonic development. This discovery could lead to advancements in tissue engineering by understanding the three-dimensional organization of epithelial organs.
Scientists at the University of Cambridge have successfully generated key life event in artificial mouse embryo created from stem cells. The team used three types of stem cells to reconstruct the process of gastrulation, a crucial step in embryonic development.
Researchers at the University of Freiburg discovered that mother plants use the auxin hormone to guide embryo development. This communication may help breeders create more resilient plants in response to environmental challenges.
Researchers have discovered a precise DNA sequence code that determines how transcription factors bind to specific regions in the genome. This finding sheds light on cell differentiation during embryonic development, offering potential insights into diseases caused by disrupted transcription factor function.
Researchers discovered Zika virus infects hot spots in the brains of chicken embryos, affecting key signaling centers and neural patterning. This finding could lead to targeted therapies and drug testing for complications associated with Zika virus in humans.
Researchers have identified a unique packaging method of genes in early embryos that helps regulate their expression. This study provides insights into the mechanisms controlling embryonic development, which may impact gene expression and inheritance, including predisposition to diseases like cancer.
A recent study published in eLife found that a maternally inherited gene is essential for proper zebrafish embryonic development, and its absence leads to fatal defects. The research reveals the critical role of this gene in regulating cell signaling pathways, including Nodal signaling, which plays a key role in left-right patterning.
Researchers have found hundreds of well-preserved pterosaur eggs, including 16 with embryonic remains, providing insights into their development and reproductive strategy. The study suggests that these flying reptiles may have needed parental care and engaged in colonial breeding.
A collection of over 200 fossilized pterosaur eggs is providing new insights into the species' development, with some containing embryonic remains up to 2 years old. The findings suggest that newborn pterosaurs needed parental care and likely participated in colonial nesting behavior.
Diffusion concentrates signal in one place, facilitating cell differentiation in Drosophila embryos. The mechanism amplifies the signal from transcription factors, increasing the likelihood of viable embryos.
Researchers from RUDN University refined understanding of synthetic toxin causing mutations in lionfish embryos. Using X-ray diffraction and NMR analysis, they determined the molecule's spatial structure, contradicting earlier interpretation.
A team of scientists has successfully analyzed chicken embryo development data, paving the way for similar research in humans. The findings provide insights into the regulation of gene transcription and its role in tissue formation.
Researchers used genome editing to stop a key gene from producing a protein in human embryos, revealing its crucial role in correct blastocyst formation. The study could help improve IVF treatments and understand causes of pregnancy failure.
A new study reveals that birds' skulls evolved differently from their relatives, resembling those of young dinosaurs and crocodiles. The team's analysis suggests that adult modern birds retain features of 'young' dinosaur ancestors, such as proportionally larger brains and eyes.
Scientists at Max Delbrück Center for Molecular Medicine in the Helmholtz Association use a new spatial mapping algorithm to reassemble the fly embryo from thousands of single cells, revealing unique gene expression profiles. The virtual embryo shows exactly which genes are active where at this point in time.
Georgina Stooke-Vaughan is investigating the mechanical development of the eye in zebrafish using a novel fluid-based method. The study aims to understand how cells divide, move and position themselves to form the complex organ.
Scientists from Helmholtz Zentrum München have found that retrotransposons, particularly LINE1 elements, regulate global chromatin accessibility in the early mouse embryo. This study identifies a novel role for retrotransposons in shaping the chromatin landscape necessary for correct developmental programming.
Researchers Fei Zhao and colleagues discovered a hormone-sensing nuclear receptor that contributes to Wolffian duct degeneration in females. The finding challenges the long-held assumption that androgens are essential for Wolffian duct retention, suggesting alternative mechanisms may be at play.
Researchers at Max Planck Institute of Immunobiology and Epigenetics found that epigenetic marks passed from mother to embryo are essential for embryogenesis. These marks, such as H3K27me3, regulate gene expression and can be inherited through generations.
The TET1 protein helps prevent congenital defects such as spina bifida by marking DNA for proper development. Its loss may also lead to late-onset diseases like mental retardation and cancer, as it controls the speed of embryonic development.
The annual killifish has evolved to survive in temporary ponds without water, allowing embryos to arrest development and survive for months. The new study provides an updated methodological guide for scientists studying this fascinating vertebrate model system.
A study by Prof. Dr. Thomas Laux and colleagues reveals that plants employ an intracellular signal pathway activated by sperm to activate gene transcription in zygotes. This collaboration between paternal and maternal factors enables the regulation of embryogenesis in plants, challenging the traditional parental conflict theory.
Biologist Carl-Philipp Heisenberg has been awarded an ERC advanced grant to study the interplay between gene regulatory networks and physical processes in embryonic development. His research will focus on gastrulation, a critical phase of embryonic development where cells are transformed into distinct layers.
Pre-implantation genetic screening (PGS) has mixed results in predicting embryo success, with uncertain impact on IVF outcomes. The technology's limitations stem from complex biology and ideology, hindering the development of new technologies to improve infertility care.
Researchers have successfully visualized the development of blood vessels in zebrafish embryos without labels or contrast agents, enabling better understanding of brain and cardiovascular diseases. The new study uses optical resolution photoacoustic microscopy to provide three-dimensional images with high spatial resolution.
Researchers at University of Cambridge create structure resembling mouse embryo in culture using two types of stem cells and 3D scaffold. The artificial embryo's development follows the same pattern as naturally developing embryos, but it lacks key cells needed for further growth.
Scientists have found a way to reprogram mouse embryonic stem cells to mimic the developmental characteristics of fertilized eggs, also known as zygotes. This breakthrough reveals a novel mechanism regulating totipotency and provides a powerful cell-culture system to further study early embryo development.
Researchers have created a novel method called RESA to identify mRNA-regulatory sequences in embryos, providing insights into the maternal-to-zygote transition and gene regulation. This breakthrough has broad applications for studying genetics and biology across various species.
A novel murine model reveals MTU1's importance in regulating mitochondrial protein translation and embryonic development. The study found a conditional knockout mouse line with liver-specific MTU1 deficiency exhibited signs of liver damage, altered metabolism, and increased FGF21 levels.
New research from Simon Fraser University aims to revolutionize In vitro fertilization (IVF) success rates using machine vision software. The software analyzes images of embryos with confirmed pregnancy outcomes to identify key developmental attributes, increasing the likelihood of successful clinical pregnancies.
A new study found that paternal phthalate exposure before conception may be associated with lower-quality embryos, with certain chemicals inversely linked to high-quality blastocysts. The research, published in Human Reproduction, suggests a potential link between preconception environmental health and reproductive success.
A new online calculator estimates individualised chances of couples having a baby through IVF or ICSI, considering specific characteristics and treatment information. The tool provides cumulative chances over up to six cycles, helping clinicians communicate personalised chances to couples and shape their expectations.
Researchers have successfully created healthy baby mice by injecting sperm into embryos developed from non-egg cells, achieving a success rate of up to 24 per cent. This breakthrough challenges the long-held dogma that only egg cells can support embryonic development.
Researchers at the University of Adelaide have developed a new technique to choose the best embryo for implantation, boosting IVF pregnancy success rates. The method uses digital imaging and mathematical modeling to analyze differences in embryos not visible under a microscope, helping embryologists make more informed decisions.
A study by UMass Amherst researcher Alicia Timme-Laragy investigates the link between early life pollutant exposure and future diabetes risk. The researchers will expose zebrafish embryos to toxic chemicals, aiming to understand how environmental contaminants affect pancreas development.
Researchers at Stanford University School of Medicine have mapped out biological signals necessary to direct human embryonic stem cells to become pure populations of bone, heart muscle, and cartilage. The ability to generate these cell types quickly is a key step toward regenerative medicine.
Researchers have successfully cultured human embryos in the lab beyond day seven, allowing them to study key stages of development and improve IVF success rates. The technique reveals a self-organising capacity of human blastocysts that was previously unknown.
Researchers found striking similarities between the genetic mechanism used in human limb development and that of skate embryos' gill arches. The study suggests that limbs may have evolved from sharks' gills via a critical gene called Sonic hedgehog, supporting a century-old theory.
Researchers found that a gap phase in the cell cycle acts as a switch to mask asynchronous synthesis, enabling a mitotic wave to coordinate with neural tube formation. This study provides insight into the critical stage of animal embryonic development.