Current Sperm News and Events

Current Sperm News and Events, Sperm News Articles.
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Mother's touch lingers in her child's genes
Mothers leave their mark on their children in many ways - and Melbourne researchers have discovered a protein called SMCHD1 is involved in this 'imprinting' process. SMCHD1 switches certain genes off, altering how a cell behaves. The new research has revealed that when an egg cell (or oocyte) is fertilised by a sperm, the egg cell's SMCHD1 lingers within the developing embryo, switching off at least 10 different genes and impacting the embryo's development - which could potentially have a lifelong impact on the offspring. (2020-11-23)

Study finds sexual lineage plays key role in transgenerational plasticity
A new pair of papers published in the Journal of Animal Ecology has shown that sexual lineage matters for how offspring receive adaptations from parents in stickleback fish. Researchers in the Bell lab studied how parents who were exposed to predators passed the behavioral information to their offspring in different ways based on sex. (2020-11-18)

The bull Y chromosome has evolved to bully its way into gametes
In a new study, published Nov. 18 in the journal Genome Research, scientists in the lab of Whitehead Institute Member David Page present the first ever full, high-resolution sequence of the Y chromosome of a Hereford bull. The research, more than a decade in the making, suggests that bulls' Y chromosomes have evolved dozens of copies of the same genes in a selfish attempt to make more males -- a move that is countered in the female-determining X chromosome. (2020-11-18)

Are the movements of tiny hairlike structures a key to our health?
New research from USC scholars identifies the mechanisms in play for cilia to work effectively and productively to push particles and fluid along, which is especially important given their critical role in health and in even ensuring reproduction. (2020-11-12)

Nut consumption causes changes in sperm DNA function
Researchers have evaluated for the first time the effect of a short/middle-term consumption of a mixture of tree nuts (almonds, hazelnuts and walnuts) on sperm DNA methylation patterns in healthy individuals reporting eating a Western-style diet. They have observed that the methylation of 36 genomic regions was significantly different between baseline and the end of the trial only in the group that consumed nuts, and 97.2% of the regions displayed hypermethylation. (2020-11-09)

Collecting sperm from Covid-19 patients
How does Covid-19 affect sperm and thus the next generation┬┤s immune system? Norwegian researchers are collecting sperm to find the answer. (2020-10-30)

Oregon researchers reveal why heat stress damages sperm
University of Oregon biologists have used the model organism Caenorhabditis elegans to identify molecular mechanisms that produce DNA damage in sperm and contribute to male infertility following exposure to heat. (2020-10-22)

Paper: Congress must clarify limits of gene-editing technologies
How the next Congress decides to handle the issue editing human sperm and eggs will affect the science, ethics and financing of genomic editing for decades to come, said Jacob S. Sherkow, a professor of law at Illinois who studies the ethical and policy implications of advanced biotechnologies. (2020-10-21)

Delivering proteins to testes could someday treat male infertility
According to the Mayo Clinic, about 15% of couples are infertile, and male infertility plays a role in over one-third of these cases. Often, problems with sperm development are to blame. Now, researchers reporting in ACS Nano have found a way to deliver a protein important for sperm cell production directly to mouse testicles, where it restored normal sperm development and allowed previously infertile mice to father pups. (2020-10-21)

Early trauma influences metabolism across generations
A study by the Brain Research Institute at UZH reveals that early trauma leads to changes in blood metabolites - similarly in mice and humans. Experiments with mice have show that these potentially harmful effects on health are also passed to the next generation. The researchers have identified a biological mechanism by which traumatic experiences become embedded in germ cells. (2020-10-15)

Chromosome defects seen from over-exchange of DNA in sperm and eggs
The exchange of DNA between chromosomes during the early formation of sperm and egg cells normally is limited to assure fertility. But when there are too many of these genetic exchanges, called crossover events, the segregation of chromosomes into eggs is flawed, say biologists who combined on a basic science project done across three labs at the University of Oregon and Northwestern University. (2020-10-07)

Research identifies sperm biomarker associated with couples' pregnancy probability
Researchers at the University of Massachusetts Amherst have identified a single-measure biomarker in sperm mitochondrial DNA that may predict male reproductive health and pregnancy success. (2020-10-06)

Evolution of the Y chromosome in great apes deciphered
New analysis of the DNA sequence of the male-specific Y chromosomes from all living species of the great ape family helps to clarify our understanding of how this enigmatic chromosome evolved. (2020-10-06)

Donor-conceived adults have higher incidence of immunology diseases
Adults conceived through sperm donation reported higher frequencies of allergies, type 1 diabetes and other autoimmune conditions. Donor sperm conceived adults had seven times more type 1 diabetes diagnoses; double the incidence of thyroid disease, acute bronchitis and sleep apnoea; and 10% more reported allergies. The study looked at 272 donor-conceived adult participants compared to 877 conceived naturally, from around the world with most from Australia, US, UK, Belgium and Netherlands. (2020-09-23)

Sugar promotes sperm longevity in pig reproductive tract
For many livestock species, artificial insemination (AI) is standard. But it can be tricky to achieve success the first time, thanks to variability in ovulation timing across the herd. A new University of Illinois study identifies a naturally occurring sugar that slows the maturation of sperm in pigs, opening up the possibility of extending sperm storage time within the female reproductive tract and increasing the chances of successful fertilization through AI. (2020-09-17)

Paleontology -- The oldest known sperm cells
An international team of paleontologists has discovered giant sperm cells in a 100-million year-old female ostracod preserved in a sample of amber. Clearly, the tiny crustacean had mated shortly before being entombed in a drop of tree resin. (2020-09-16)

World's oldest animal sperm found in tiny crustaceans trapped in Myanmar amber
An international collaboration between researchers at Queen Mary University of London and the Chinese Academy of Science in Nanjing has led to the discovery of world's oldest animal sperm inside a tiny crustacean trapped in amber around 100 million years ago in Myanmar. (2020-09-16)

100-million-year-old amber reveals sexual intercourse of ostracods
Dr. WANG He and Prof. WANG Bo, from the Nanjing Institute of Geology and Palaeontology of the Chinese Academy of Sciences (NIGPAS), and their collaborators presented exceptionally well-preserved ostracods with soft parts (appendages and reproductive organs) from mid-Cretaceous Myanmar amber (~100 million years old), which revealed sexual intercourse of ostracods. (2020-09-15)

Gene-edited livestock 'surrogate sires' successfully made fertile
For the first time, scientists have created pigs, goats and cattle that can serve as viable 'surrogate sires,' male animals that produce sperm carrying only the genetic traits of donor animals. The advance could speed the spread of desirable characteristics in livestock and improve food production for a growing global population. (2020-09-14)

The birth of a male sex chromosome in Atlantic herring
The evolution of sex chromosomes is of crucial importance in biology as it stabilises the mechanism underlying sex determination and usually results in an equal sex ratio. An international team of scientists, led by researchers from Uppsala University, now reports that they have been able to reconstruct the birth of a male sex chromosome in the Atlantic herring. The male-specific region is tiny and contains only three genes: a sex-determining factor and two genes for sperm proteins. (2020-09-09)

UBC scientists find clues to queen bee failure
Scientists at UBC are unravelling the mysteries behind a persistent problem in commercial beekeeping that is one of the leading causes of colony mortality--queen bee failure. (2020-09-08)

Viruses play critical role in evolution and survival of the species
New research in Nature Structural & Molecular Biology shows viruses also play a key evolutionary role in mammals' ability to reproduce and survive, according to scientists in the Cincinnati Children's Perinatal Institute and at Azabu University in Japan. (2020-09-07)

In butterfly battle of sexes, males deploy 'chastity belts' but females fight back
Some male butterflies seal their mate's genitalia with a waxy 'chastity belt' to prevent future liaisons. But female butterflies can fight back. Could this sexual one-upmanship ultimately result in new species? (2020-09-03)

Study examines link between sperm quality and light from devices at night
Men might want to think twice before reaching for their smartphone at night. A new study found correlations between electronic media use at night and poor sperm quality. (2020-08-26)

Partner selection ultimately happens in the woman's reproductive tract
The female reproductive tract has the final say in human mate choice, according to new research from the University of Eastern Finland. (2020-08-19)

Surprising coral spawning features revealed
When stony corals have their renowned mass spawning events, in sync with the moon's cycle, colonies simultaneously release an underwater 'cloud' of sperm and eggs for fertilization. But how do the sperm and eggs survive several hours as plankton, given threats from predators, microbes and stresses such as warming waters? A Rutgers-led team has discovered some surprising features in coral sperm and eggs (collectively called gametes), according to a study in the journal PeerJ. (2020-08-18)

Research captures how human sperm swim in 3D
Using state-of-the-art 3D microscopy and mathematics, Dr Hermes Gadêlha from the University of Bristol, Dr Gabriel Corkidi and Dr Alberto Darszon from the Universidad Nacional Autonoma de Mexico, have reconstructed the movement of the sperm tail in 3D with high-precision. (2020-08-13)

Why the 'wimpy' Y chromosome hasn't evolved out of existence
The Y chromosome has shrunken drastically over 200 million years of evolution. Even those who study it have used the word ''wimpy'' to describe it, and yet it continues to stick around. An Opinion paper publishing on August 6, 2020 in the journal Trends in Genetics outlines a new theory--called the 'persistent Y hypothesis'--to explain why the Y chromosome may be more resilient than it first appears. (2020-08-06)

Completing the set: 'Coupon-collection behavior' reduces sex-ratio variation among families
A new analysis of sibling records from more than 300,000 individuals suggests that some parents continue to reproduce until they have children of both sexes. (2020-08-06)

Monkeying around: Study finds older primates father far fewer babies
Older male rhesus monkeys sire fewer offspring, even though they appear to be mating as much as younger monkeys with similarly high social status. Sperm quality or quantity, or the survival of infants, may decline with the age of the would-be father, the new study suggests. A new study from Washington University in St. Louis has implications for understanding some age-related aspects of male reproductive health in primates, including humans. (2020-08-03)

How human sperm really swim: New research challenges centuries-old assumption
A breakthrough in fertility science by researchers from Bristol and Mexico has shattered the universally accepted view of how sperm 'swim'. (2020-07-31)

Underwater robots reveal daily habits of endangered whales
Research led by the University of East Anglia (UEA) has revealed the daily habits of the endangered Mediterranean sperm whale. The recordings confirmed the whales' widespread presence in the north-western Mediterranean Sea and identified a possible hotspot for sperm whale habitat in the Gulf of Lion, as well as different foraging strategies between different areas. (2020-07-29)

Overweight and obesity are associated with a low sperm quality
Researchers from the Rovira i Virgili University in collaboration with researchers from the University of Utah have carried out a systematic review and meta-analysis evaluating the association between adiposity (normal weight, overweight, obesity, and low weight) and the sperm quality. Overweight and/or obesity were associated with low semen quality parameters and underweight category was likewise associated with low sperm normal morphology. According to the researchers, this work demonstrates the importance of adiposity in semen quality. (2020-07-27)

Everything you ever wanted to know about leech sex but were afraid to ask
New research, published in Environmental Toxicology and Chemistry, sheds light on the effects the synthetic estrogens commonly found in birth control pills have on leeches. (2020-07-21)

Label-free imaging helps predict reproductive outcomes
Researchers at the University of Illinois at Urbana-Champaign have used a combination of label-free imaging and artificial intelligence to determine the potential fertility of sperm samples in cattle. The technique may help improve assisted reproductive technology in humans. (2020-07-20)

UNH scientists find faster way to count animal sperm using DNA
Researchers at the University of New Hampshire have identified a quicker and less expensive way to count sperm in lobsters that could help scientists looking at any animal better understand mating, a key aspect of species survival. (2020-07-17)

Healthy offspring from testicular tissue plantation in mice: Retinoic acid key
Germ cell depletion in recipient testis has adverse effects on spermatogenesis in orthotopically transplanted testis pieces via retinoic acid insufficiency. Repetitive RA administration significantly improved donor spermatogenesis to produce healthy offspring. (2020-07-16)

New test offers clarity for couples struggling to conceive
A male fertility test based on Cornell research could help predict which men might need treatment and which couples might have success with different forms of assisted reproduction. (2020-07-16)

15-foot-long skeleton of extinct dolphin suggests parallel evolution among whales
A report in the journal Current Biology on July 9 offers a detailed description of the first nearly complete skeleton of an extinct large dolphin, discovered in what is now South Carolina. The 15-foot-long dolphin (Ankylorhiza tiedemani comb. n.) lived during the Oligocene--about 25 million years ago--and was previously known only from a partial rostrum (snout) fossil. (2020-07-09)

No NELL2, no sperm motility; novel protein is essential for male fertility
An international team of researchers has identified a chain of events that matures the sperm and triggers their motility. The findings have implications for diagnostic and therapeutic research in male infertility and male contraceptive development. (2020-07-09)

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