Articles tagged with Gametes
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Researchers have discovered a key protein structure in the germ cells of male mice that causes deformations in sperm flagellum leading to infertility. The study used ultrastructure expansion microscopy to visualize the centriole, a tiny cylindrical structure critical for sperm movement.
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 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.
Researchers discovered that a single mutation in a key synaptonemal complex protein can cause infertility in mice and is likely to have the same effect in humans. This finding may lead to new technologies for treating male infertility by pinpointing the exact location of the defect.
A global fertility crisis affects one in six couples, with half the time originating from men. Researchers highlight the need for targeted treatments and improved diagnoses, citing lifestyle factors such as hormone-disrupting chemicals, poor diet, stress, and smoking as contributing causes.
A study published in Nature Communications reveals a small secreted protein NICOL regulates lumicrine-mediated sperm maturation and male fertility. The research team discovered that mice lacking NICOL were sterile, indicating its importance for the sperm-maturation pathway.
Researchers from Osaka University have identified a protein called FER1L5 that is crucial for the acrosome reaction, allowing sperm to fertilize eggs. The study found that mice lacking FER1L5 were unable to undergo the acrosome reaction, highlighting the importance of this protein in male fertility.
Researchers at Hokkaido University propose two novel hypotheses to address the 'two-fold cost of sex' in sexual reproduction. The first hypothesis suggests that meiosis eliminates harmful mutations through a process known as the 'seesaw effect.' The second hypothesis proposes that anisogamy evolved through 'inflated isogamy,' where lar...
A meta-analysis of 4280 samples found cell phone use associated with reduced sperm motility, viability, and concentration. The study suggests male users should limit daily cell phone use to protect their fertility.
Researchers discovered an asymmetrical behavior in isogamous yeast, where MATa cells exhibit exploratory search and MATα cells display short-range gradient sensing. This finding challenges previous assumptions on the evolutionary origins of sexual dimorphism.
Researchers discovered that the KATANIN enzyme plays a crucial role in moderating mechanical properties of papilla cell walls, allowing correct pollen tube orientation and successful fertilization. This finding suggests KATANIN's potential role in the success of flowering plants on Earth.
Researchers at Instituto Gulbenkian de Ciencia cracked the mystery of centriole elimination in oocytes, showing that losing this structure is crucial for sexual reproduction and female fertility. The study found that centrioles are eliminated step-wise due to a regulator called polo kinase protein.
A new analysis explores the possibility of in vitro gametogenesis for human reproduction, allowing same-sex couples to have biologically related children. The procedure could also enable 'perfecting reproduction' by making prenatal selection easier and more robust.
Researchers have made a groundbreaking observation of cellular architecture using high-powered microscopes, revealing the structure of microtubules during gamete formation. The findings could impact the treatment of diseases caused by misregulation of microtubule structures, including Down syndrome and cancer.