Articles tagged with Germ Cells
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A study published in Science Advances has discovered that the RAD21L protein plays a crucial role in regulating DNA structure and gene expression in sperm precursor cells. The absence of this protein leads to defects in chromosome pairing, genetic recombination, and spermatogenesis, resulting in male infertility.
Researchers have identified distinct immune profiles for different subtypes of pediatric germ cell tumors, which could lead to more targeted therapies. The study found that certain tumor subtypes respond well to immunotherapy and others exhibit an immunosuppressive environment, making them more aggressive.
Researchers at Wyss Institute develop in vitro method to induce meiosis in human cells, enabling replication of critical step in egg and sperm cell development. The breakthrough could lead to modeling defects and creating healthy gametes for individuals with infertility.
A team of researchers at Kyoto University successfully cryopreserved mouse stem cells and sent them to the International Space Station, where they returned healthy offspring after thawing. The study suggests that cryopreservation can maintain fertility for at least six months, paving the way for future human spaceflight.
Researchers have developed a novel method to generate rats with ES cell traits using blastocyst complementation. This approach eliminates the need for fluorescent labeling and reduces costs compared to conventional techniques.
The histone modification H3K4me3 is crucial for chromosome and spindle stabilization, normal oocyte development, and embryonic competence. Removing H3K4me3 leads to destabilized spindles, impaired embryonic development, and decreased fertility.
Researchers developed tiny human ovary organoids using stem cells to understand gonad development and disease. The models replicate key aspects of ovarian follicles, offering a powerful platform for studying gene function in a controlled environment.
This study reveals NAT10 is crucial for spermatogonial proliferation and differentiation. In Nat10-deficient mice, infertility occurs with reduced testicular sizes, germ cell depletion, and a loss of spermatogonial homeostasis.
In planarian flatworms, biogenic monoamines play a critical role in regulating female and male germ cells. Researchers discovered that these molecules form a novel signaling pathway controlling planarian germ cells, producing the 'BATT Signal' to regulate reproductive development. The study highlights the importance of monoamine conjug...
Kumamoto University researchers discovered HSF5's crucial role in the completion of meiosis and activation of genes essential for sperm formation under non-stress conditions. HSF5 is distinct from other Heat Shock Factors, which primarily regulate gene expression in response to stress.
A new study from Uppsala University found that women with germ cell tumors have a significantly lower five-year survival rate (85.2%) compared to men (98.2%). The researchers suggest that concentrating patients in fewer hospitals and using treatment strategies for testicular cancer could improve survival rates and reduce side effects.
Researchers analyze fertilized ascidian oocytes to understand the mechanism driving cytoplasmic reorganization and cell shape changes. Friction forces between cellular components, such as actomyosin cortex and myoplasm, are found to be pivotal in determining organismal shape.
Research by Professor Björn Schumacher investigates the role of male germ cells in genetic mutations. The study suggests that paternal DNA damage can lead to faulty repairs in the genome, resulting in structural variants.
A research team at Leibniz-IZW identified molecular markers for testicular cell types in domestic cats and four wild feline species, allowing for the clear identification of Leydig and Sertoli cells, spermatogonia, and advanced germ cell stages. This breakthrough enables the maturation process of male germ cells in vitro.
Scientists at the Wyss Institute and Gameto develop a living, fully human ovarian organoid that supports egg cell maturation and secretes sex hormones. This technology enables the study of human ovarian biology without tissue from patients and could lead to new treatments for infertility and ovarian cancer.
A new stem cell model allows researchers to study the earliest stages of sex determination in mice and humans, providing insights into Disorders of Sex Development (DSD). The model enables the creation of a 'mini testis' in a dish, which could lead to better understanding of DSD, infertility, and fertility restoration.
Researchers at Osaka University have successfully induced precursors of eggs and sperm in white rhinoceros cells, paving the way to possibly rebuilding northern white rhino populations. This breakthrough uses advanced assisted reproductive technologies to address a key challenge in conservation efforts.
In a complex process, germ cells produce GRIF-1 protein to mark and degrade maternal RNA molecules, gaining access to their own genetic material. This allows for the development of an entire organism without maternal control.
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 generated rat sperm cells inside sterile mice using blastocyst complementation, achieving a proof-of-principle for producing gametes from one animal species in another. This breakthrough may speed up the production of transgenic rats for biomedical research and potentially support animal species conservation efforts.
Researchers at Kyoto University's Institute for the Advanced Study of Human Biology have developed a new method to culture human fetal immature germ cells into oocytes. The study found that essential controlling mechanisms are similar across mouse, monkey, and human species, while certain genes are expressed only in humans and monkeys.
A recent study found that extra copies of the 3p25.3 region of DNA can lead to chemotherapy resistance in germ cell cancer. The research suggests this abnormality may be a key factor in predicting patient outcomes and could help identify those at high risk, allowing for alternative treatment options
A new gene ZFP541 has been discovered by researchers at Kumamoto University to control the completion of meiosis in spermatogenesis. The study found that ZFP541 plays an essential role in regulating meiosis and is expressed in late meiotic prophase, binding to regulatory regions of meiosis-related genes.
A new study reveals that smoking during puberty can have negative consequences for future generations, including lower lung function and increased risk of obesity. Researchers analyzed data from the RHINESSA and RHINE studies, finding a link between pre-pubertal tobacco smoke exposure and health outcomes in offspring.
A study has found that sperm development is linked to testicular cancer in men. Germ cells that fail to undergo sex-specific differentiation and retain pluripotent features are more likely to transform into cancer cells.
A new molecular pathway discovered in fruit flies helps steer moving cells towards specific destinations, which may drive cancer cells to metastasize. The pathway involves a series of proteins and enzymes that work together to control cell movement, offering potential targets for interrupting cancer cell spread.
A new study overturns the classic theory that single-celled organisms can only evolve to become multicellular life forms if doing so increases their overall productivity. The model suggests that cell specialization can be favored even if it reduces group productivity, contradicting the prevailing view.
A study by University of Zurich's Brain Research Institute found that early childhood trauma can lead to changes in lipid metabolism and glucose levels in offspring and grand-offspring. The researchers discovered a molecular mechanism involving the PPAR receptor, which is activated by fatty acids and regulates gene expression.
A recent study by Carnegie Institution scientists mapped gene activity in thousands of immature egg cells and helper cells to understand how ovaries maintain female fertility. The research showed that follicles, where eggs mature, have a finite number of cell clusters assembled before birth.
Researchers at Washington State University discovered a fatty acid called dihomogamma-linolenic acid (DGLA) that can induce ferroptosis in human cancer cells. This iron-dependent type of cell death has been linked to various diseases and may hold potential as a treatment for cancer.
Scientists at Leibniz-IZW developed a method to isolate and cryopreserve testicular cells of threatened or endangered felines. The method allows for the safekeeping of gametes, enabling conservation efforts through biobanking and future applications in species preservation.
A study published in Science found that Hydractinia, a North Atlantic jellyfish, can produce eggs and sperm more flexibly than humans. The research reveals that the jellyfish uses a gene called Tfap2 to commit its adult stem cells to gamete production throughout its lifetime.
Researchers studied Hydractinia's unique ability to produce germ cells nonstop throughout its life. The study found that the gene Tfap2 controls perpetual germ cell production in this animal, a process similar to humans but with distinct differences. This discovery could provide clues to human reproductive disorders.
Researchers have developed a live-cell imaging technique that enables the visualization of fundamental processes in flower development and opens up new avenues for research on plant sexual reproduction. The technique, called light sheet fluorescence microscopy (LSFM), records movies of plant reproductive events for the first time.
UCLA researchers have made a breakthrough in developing lab-grown eggs and sperm for infertility treatment. They discovered that human stem cells can be coaxed into forming germ cells, which are the precursors to egg and sperm cells. The study could pave the way for generating healthy eggs and sperm in a laboratory setting.
Researchers at Kumamoto University have discovered the Meiosin gene, which acts as a control tower to switch on hundreds of genes for germ cell formation. This finding has significant implications for reproductive medicine and infertility treatments.
The UTokyo team revealed a protein called Zucchini processes piRNA from an immature form into a functional form, while another protein called Trimmer matures the intermediate piRNA. The researchers discovered that the signal for cutting RNA strands is more complex than previously thought.
Researchers discover that koala germ cells recognize and suppress retroviral invasion through a unique 'piRNA response' mechanism. This innate genome immune system can identify viral RNA and block its replication, providing a new understanding of how organisms defend against pathogen invasions.
Researchers discovered a crucial developmental period in male sperm development that enables fathers to pass on genetic information. The study found that the 3D organization of DNA in maturing male reproductive cells is necessary for fertility, with potential implications for reproductive health problems.
A new study has discovered a single protein called Dazl that regulates a network of genes essential for developing sperm to replicate and survive. This finding could lay the groundwork for future research into therapies for infertile men, offering insights into molecular events that ensure survival of germ cells.
Researchers at UC Santa Cruz have discovered that sperm retain epigenetic marks important for the development of the germ line in offspring. This study provides evidence that the life experience of a father can affect the health of his descendants, highlighting the importance of epigenetic information carried by sperm.
Researchers at the University of Edinburgh discovered a molecule that blocks Otx2 activity, crucial for germ cell development. The study sheds light on the earliest stages of sperm and egg cell formation, offering new insights into the processes governing their separation from other cells.
Michigan Medicine researchers created the most complete catalog of cells in the male gonads by analyzing over 30,000 individual cells from mouse testes. The study reveals a continuous sperm cell developmental program and identifies new cell types and molecular features that can help understand the causes of male infertility.
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.
Geneticists at Martin Luther University Halle-Wittenberg deciphered a central signalling pathway that encodes and controls the synchronisation of multiple processes during germ cell development in C. elegans. This process involves RNA-binding proteins and a MAP kinase signalling pathway, optimising germ cell production.
Research suggests that taking painkillers during pregnancy could reduce the number of cells in the testes and ovaries, which give rise to sperm and eggs. This could lead to an early menopause in females and affect the fertility of future generations.
A new study by Nagoya University reveals that germ cells in medaka fish can feminize the body before the sexual fate decision is made. This finding suggests that the mechanism underlying this effect is activated early in development and plays a critical role in sex determination.
Researchers at Osaka University found that GTSF1 is essential for regulating piRNA-mediated cleavage of target RNA, preventing retrotransposon overactivity. This mechanism safeguards the genome in male germ cells.
Researchers have found that exposure to ibuprofen during the first three months of fetal development results in a dramatic loss of ovarian germ cells, leading to reduced fertility. Studies suggest that prolonged exposure to ibuprofen may lead to long-term effects on women's fertility.
A recent study by the John Innes Centre team has discovered an undiscovered reprogramming mechanism in plant germ cells, allowing them to maintain fitness over multiple generations. This finding sheds light on the importance of DNA methylation reprogramming in plants and its potential applications for crop improvement.
Researchers found that Ptbp2 regulates RNA processing during sperm development, controlling over 200 genes involved in movement and communication. Without the protein, sperm development went awry, leading to defects in cellular processes.
Researchers identified multiple genes that enable somatic cells to switch to germline fate in plants. The discovery provides molecular evidence for the evolution of reproductive systems in ancient plants, showing how plants limit switching to create a single germ cell.
Researchers analyzed rooster testes to uncover how piRNA shields germ cells from viral invaders. The study reveals a unique defense mechanism that could be adapted to combat human diseases related to viruses like avian leukosis virus, which can lead to cancer in chickens and is related to similar viruses in humans.
Researchers at Dana-Farber Cancer Institute have identified a unique genomic signature and chromosomal changes that drive sensitivity to chemotherapy in testicular tumors. The findings suggest that testicular cancers are already primed for self-destruction, making them highly susceptible to treatment.
Researchers found that folates can stimulate stem cell proliferation independently of their role as vitamins, using an in vitro culture and animal model system. The discovery provides evidence for a new pathway involving bacterial folate, which may have implications for human health.
A recent study reveals a novel crosstalk mechanism between mitochondrial translation and cytoplasmic translation, essential for spermatogenesis. The mTOR signaling pathway helps balance the dynamic between mitochondrial translation and cytoplasmic translation, preventing negative impacts on protein quality and half-life.
A research team at the University of Tokyo has identified an enzyme called Trimmer, which trims the tails of small RNAs called piRNAs. This process helps regulate jumping genes, or transposons, that can disrupt host genes and contribute to diseases like cancer.
Researchers at the University of Cambridge have developed a non-invasive blood test that can diagnose some types of malignant childhood tumour with high accuracy. The test looks for specific genetic code patterns in blood and cerebrospinal fluid samples, allowing for early diagnosis and monitoring without exposure to radiation.
Researchers at Kyoto University have created a lab-based human germ cell development model, revealing specific key elements and events that occur at the beginning of human life. This breakthrough provides insight into how epigenetic marks are erased during early germ cell development, shedding light on conditions such as infertility.
A research team from NUS Medicine has demonstrated that applying an external source of hydrogen sulphide can protect testicular germ cells against heat-induced injury, a major cause of male infertility. The findings provide a potential therapeutic value for H2S in treating male infertility.