Chromosome positioning during sperm differentiation described
Chromosomes occupy specific regions of the cell nucleus called chromosome territories. In somatic cells, scientists have observed that there is a correlation between this positioning and genome regulation. In fact, alterations in chromosome distribut.....»»
How HIV smuggles its genetic material into the cell nucleus
Each year, about 1 million individuals worldwide become infected with HIV, the virus that causes AIDS. To replicate and spread the infection, the virus must smuggle its genetic material into the cell nucleus and integrate it into a chromosome......»»
Scientists identify potential new method for diagnosing male infertility
Researchers have discovered a new phenomenon where sperm from mice can induce non-reproductive cells from hamsters to fuse and form a syncytia—a cell with multiple nuclei......»»
Study uncovers the non-isotropic nature of tropospheric delay for high-precision GNSS positioning
Global navigation satellite systems (GNSSs) provide invaluable positioning data for countless applications, from everyday navigation to scientific research. Tropospheric delays, caused by the refractive properties of the atmosphere, significantly imp.....»»
Missing gene in mouse sperm could explain infertility
Mice lacking a certain gene are unable to produce offspring because their sperm lack the connection between the tail and the head. A new thesis from the University of Gothenburg indicates a probable cause of male infertility......»»
A Gel Injected Into the Scrotum Could Be the Next Male Contraceptive
Biotech company Contraline has safely implanted a sperm-blocking hydrogel in 23 men. It’s designed to be a fully reversible vasectomy......»»
Sperm whales found to live in large, matrilineally based clans
A sperm whale expert at Dalhousie University, in Canada, has found evidence showing that sperm whales form large matrilineally based clans that have their own coda dialect. In his paper published in the journal Royal Society Open Science, Hal Whitehe.....»»
Researchers produce first macromolecular model of plant secondary cell wall
A multidisciplinary approach has enabled researchers with the U.S. Department of Energy's (DOE's) National Renewable Energy Laboratory (NREL) to quantitatively define the relative positioning and arrangement of the polymers in Populus wood and to cre.....»»
Juvenile sperm whale euthanized after stranding on North Carolina beach
A juvenile sperm whale that appeared to be in poor health was euthanized Wednesday after stranding on a North Carolina beach......»»
New technology for long-term liquid storage of chicken semen by arresting energy metabolism
Researchers from the University of Tsukuba have developed an advanced refrigerated storage technology that prolongs the fertilization capacity of chicken sperm by arresting the energy metabolism dynamics, achieved through the depletion of calcium ins.....»»
Researchers identify protein with DYRK1A-inhibiting effect that may have implications for Down syndrome
Down syndrome, a congenital disorder stemming from abnormal cell division and differentiation, is most common in newborns fated to neurodevelopmental delays and other health complications......»»
Eggs from men, sperm from women: How stem cell science may change how we reproduce
It may soon be possible to coax human skin cells into becoming functional eggs and sperm using a technique known as "in vitro gametogenesis." This involves the creation (genesis) of eggs and sperm (gametes) outside the human body (in vitro)......»»
Seafloor geodetic positioning model achieves centimeter-level precision
In a study published on 4 December 2023, in the journal Satellite Navigation, researchers from Chinese Academy of Surveying and Mapping have developed a self-structured Empirical SSP (SESSP) approach to overcome previous limitations. This novel metho.....»»
Advanced GNSS technique enhances accuracy in landslide monitoring
In a study published on 13 November 2023, in the journal Satellite Navigation, researchers from Chang'an University have developed a novel approach using the Precise Point Positioning (PPP) technique combined with a cumulative sum control chart (CUSU.....»»
Researchers elucidate how IGF2"s secretory pathway mediates muscle stem cell differentiation
A research team led by the Hong Kong University of Science and Technology (HKUST) recently revealed how TMED10, a type of transmembrane protein, regulates muscle stem cell differentiation through mediating the secretion of insulin-like growth factor.....»»
Tiny worms are helping scientists better understand fertility
Studying sex from just the male perspective misses half the experience. But much of what we know about the origins of reproductive cells comes from looking at sperm and egg formation separately—or only focusing on sperm......»»
Research reveals clever dosage control mechanism of biallelic genes
Have you ever wondered why we carry two copies of each chromosome in all of our cells? During reproduction, we receive one from each of our parents. This means that we also receive two copies, or alleles, of each gene—one allele per chromosome or p.....»»
Malfunction in spermatogenesis: Researchers uncover contribution of cylicin proteins to male fertility
For successful fertilization, sperm should move forward rapidly and be shaped correctly. The unique structure of the sperm cells forms during spermiogenesis. Now, researchers from the University Hospital Bonn (UKB) and the Transdisciplinary Research.....»»
Team discovers protein crucial for B cell differentiation and antibodies
A cell nucleus is a busy place. Cellular proteins twist and pull DNA, folding the genome into intricate 3D structures that support functioning of its coding parts......»»
The way a sperm tail moves can be explained by mathematics worked out by Alan Turing
Alan Turing might be best know for his work helping to crack Germany's "Enigma" communications code during the second world war. But he also came up with a theory where patterns can form just through chemical compounds spreading out (diffusing) and r.....»»
Physicists model chromosome folding, reveal how loops affect spatial organization of the genome
Human chromosomes are long polymer chains that store genetic information. The nucleus of each cell contains the entire human genome (DNA) encoded on 46 chromosomes with a total length of about 2 meters. To fit into the microscopic cell nucleus and at.....»»