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Spontaneous in Biological News

Chromosomal problems affect nearly all human embryos

... instability observed in vitro also occurs in spontaneous pregnancies since, at most, 30% of human conceptions result in a live birth and more than 50% of spontaneous abortions carry chromosomal aberrations. The high ... increase the live birth rate and decrease the spontaneous abortion rate per embryo transferred. ...

Effectiveness of progesterone in reducing preterm births may be altered by genetic predisposition

... study author and SMFM member. Women who have a spontaneous preterm delivery are at greatly increased risk of ... to respond to 17P for the prevention of recurrent spontaneous preterm birth. All patients had at least one prior spontaneous preterm birth. The study extracted DNA from the ...

A novel X-ray source could be brightest in the world

... uses undulators to create bright x-ray beams of spontaneous emission at the Advanced Photon Source (APS) at ... lasers has been concentrated on self-amplified spontaneous emission (SASE), which would amplify the spontaneous emission by a factor of a million or more in a ...

Eat chocolate, drink wine, add fun to life: SLU geriatrician shares secrets of staying young

... those who want to stay young to add a little SPF spontaneous physical fun -- to their lives. He advocates ... of the elevator or going dancing once a week. spontaneous physical fun is such a logical thing, and so ... you get older along with looking for ways to add spontaneous physical fun into your life. Use hormone ...

News tips from the Journal of Neuroscience

... spontaneous Astrocytic Ca 2+ Oscillations and Neurite Growth ... et al. explore the signaling pathway between spontaneous Ca 2+ oscillations in cultured astrocytes and ... This molecule hydrolyzes IP 3 and thus prevented spontaneous astrocytic Ca 2+ oscillations. Growth cone ...

Tracking down the causes of multiple sclerosis

... the disease. It would appear that B cells play an unexpected role in the spontaneous development of multiple sclerosis and that particularly aggressive T cells ... has prompted surprising insights into the role of the B cells in the spontaneous development of MS. This and the astonishing finding that particularly ...

Therapeutic cloning gets a boost with new research findings

... rise to a mammal's sperm or eggs, exhibit a five to ten-fold lower rate of spontaneous point mutations than adult somatic cells, which give rise to the body's ... fetuses and cloned fetuses that are the same age have similar rates of spontaneous mutation development. They attribute this finding to epigenetic ...

LSUSHC researchers find potential new target for hypertension treatment

... enzyme 2 (ACE2) helps preserve the function of a key spontaneous reflex involved in blood pressure regulation and confirms its potential as ... Beat-to-beat short term regulation of blood pressure is provided by a spontaneous reflex called the baroreceptor reflex. Receptors in the arteries sense ...

Uncultured bacteria found in amniotic fluids of women who experience preterm births

... and inflammation. Intra-amniotic inflammation is known to set off spontaneous births of preterm babies at less than 32 weeks, said Yiping Han, associate ... or difficult-to-cultivate species may play a key role in initiating spontaneous preterm births," said Han. These bacteria either reach the placenta ...

IVF does not increase risk of developmental disorders in children

... although minimal hormonal support is still necessary in order to prevent spontaneous ovulation. Ninety singleton babies born to sub-fertile parents who ... The researchers studied the babies' neurodevelopment by assessing their spontaneous movements, known as general movements, early in infancy. "The quality of ...

What scientists know about jewel beetle shimmer

... liquid crystal whose free surface has cone-like structures and that has a helical arrangement of molecules. Research suggests the cells come from spontaneous arrangement of glucose-like particles called chitin molecules that form as cones like those in a cholesteric liquid crystal. When these cones ...

Children's Hospital of Pittsburgh of UPMC scientists identify enzyme important in aging

... as pregnancy-associated plasma protein A (PAPPA). PAPPA-knockout mice live at least 30 percent longer and have significantly lower occurrence of spontaneous tumors than typical mice. PAPPA controls the availability in tissues of a hormone known as insulin-like growth factor (IGF) that is a promoter of ...

Women with endometriosis need special care during pregnancy to avoid risk of premature birth

... were delivered by Caesarean section," said Dr. Falconer. "We observed that among these women the risk of induced preterm birth was higher than for spontaneous preterm birth. We believe that women with endometriosis are more frequently scheduled for preterm Caesarean section, possibly due to placental ...

Ovarian transplantation: First baby is born after a new technique

... menopause for eight and a half years before transplantation," said Dr. Piver. "But after transplanting half of the frozen ovary, she recovered spontaneous ovulation in four months. Her right fallopian tube had been destroyed by the ovarian retrieval, and the function of the ovary and hence the chances ...

Ovarian transplantation: New technique gives greatly improved results in this delicate operation

... undergo a simpler procedure with equally successful results." Out of the eight women who received cortical transplants, six have had one or more spontaneous pregnancies, resulting in the birth of seven healthy babies. "We are in the middle of a massive global infertility epidemic, caused by the new ...

New, less invasive genetic test greatly improves pregnancy rates in older women with poor prognosis

... patients. It is also likely to achieve a reduction in congenital abnormalities such as Down's syndrome, as well as a reduction in the frequency of spontaneous miscarriage." The incidence of chromosomal abnormalities in human eggs is closely related to maternal age, and can affect more than 60% of all ...

Super-sleepers could help super-sizers!

... of re-awakening, increasing mitochondrial coupling does not seem to be a particularly good idea for animals that tend to exhibit short periods of spontaneous arousal during the dormancy period, in some cases even daily. Burrowing frogs, on the other hand, are believed to remain deeply asleep during the ...

OHSU researchers study the idling brain

... continue to interact while a person is supposedly at rest sort of like a car that idles at a stoplight. Our lab is studying these interactions, or spontaneous brain activity, while the brain is at rest. We think that this approach will eventually help us distinguish typical function from atypical function ...

Mouse model provides a new tool for investigators of human developmental disorder

... April 21, 2009, Cambridge, UK Wolf-Hirschhorn Syndrome (WHS) is a human disease caused by spontaneous genetic deletions. Children born with WHS have a characteristic set of facial features, including a wide flat nose bridge, downturned mouth, high ...

Multiple route bone marrow stem cell injections show promise to treat spinal cord injury

... concluded Dr. Silva," that all of our patients with acute injuries improved significantly with no signs of deterioration or impediment of presumed spontaneous recovery." According to Dr. Svitlana Garbuzova-Davis, a spinal cord researcher at the University of South Florida, the study highlights the value ...

Greatest thing since sliced bread: New data offer important clues toward improving wheat yields

... key for better quality of life for billions." To conduct this analysis, the authors attempted to recreate the evolutionary events leading to the spontaneous origin of bread wheat in nature. To do this, they crossed a diploid and tetraploid progenitor species and formed a synthetic strain of wheat in the ...

Researchers genetically link Lou Gehrig's disease in humans to dog disease

... very high levels of the SOD1 protein that can produce pathologic processes distinct from those occurring in ALS patients. Since the SOD1 mutation is spontaneous in dogs, the clinical spectrum in dogs may represent more accurately that of human ALS. "Compared with the rodent models for ALS, dogs with DM ...

A simple fusion to jump-start evolution

... is better, though efficiency drops again after reaching around 100) and the similarity of the fragment sequences. The researchers note that this spontaneous fusing, or ligation, would a simple way for RNA to overcome initial barriers to growth and reach a biologically important size; at around 100 bases ...

Practice as well as sleep may help birds learn new songs

... for how this works," said Margoliash. "At night, the auditory information that the bird was exposed to during the day is reactivated, [carried by the spontaneous activity of neurons], changing the structure of the neural networks. These changes interact with changes during the day as birds listen to tutor ...

Orangutan's spontaneous whistling opens new chapter in study of evolution of speech

... December 11, 2008 Throughout history, human beings have used the whistle for everything from hailing a cab to carrying a tune. Now, an orangutan's spontaneous whistling is providing scientists at Great Ape Trust of Iowa new insights into the evolution of speech and learning. In a paper published this ...

December 2008 Geology and GSA Today media highlights

... The chemical and isotopic composition of the gas show that it is not associated with volcanic activity, a geothermal system, an oil field fire, or spontaneous combustion of modern organic material incorporated in the slide. Pyrite (iron sulfide) and fine-grained carbonaceous matter (essentially small ...

First at-home test for vasectomized men proves to be safe, accurate

... Monitoring is important because vasectomies are not 100 percent successful, and men who have had them can experience recanalization, or the spontaneous healing or restoration of the vas deferens, which restores their fertility. "SpermCheck Vasectomy is similar in size and function to a women's ...

AGU journal highlights -- July 23, 2008

... about 85 km (53 mi) with uniform vertical resolution of 300 meters (980 feet) throughout the middle atmosphere. This GCM successfully simulates the spontaneous generation of gravity waves by convection, topography, instability, and adjustment processes, as well as their propagation and dissipation, resulting ...

The aorta is torn apart in the Marfan syndrome

... Marfan syndrome occurs at a frequency of between 1:5000 and 1:10000 and is either hereditary or the result of spontaneous genetic mutations. As a consequence, there are changes in the consistency of connective tissue. Symptoms develop in the cardiovascular system, the ...

Researchers observe spontaneous 'ratcheting' of single ribosome molecules

... subunits move in relation to one another. When Ha and postdoctoral fellow Peter Cornish observed the signal from the labeled ribosomes, they saw a spontaneous back-and-forth rotation between the subunits even in the absence of the elongation factor, EF-G. "Other researchers proposed that this rotation ...

What's bugging locusts?

... Since ancient times, locust plagues have been viewed as one of the most spectacular events in nature. In seemingly spontaneous fashion, as many as 10 billion critters can suddenly swarm the air and carpet the ground, blazing destructive paths that bring starvation and ...

Programmed death boosts business

... known in biological circles as apoptosis, is a natural process in which damaged, diseased, or otherwise unwanted cells are stimulated to undergo spontaneous self destruction. Apoptosis is a very useful process. Under normal conditions, it models the foetus, allowing growing fingers to separate for form ...

T-cadherin affects blood vessel growth in breast cancer, hormone from fat cells may play a role

... have led a team that developed the first living model to study this proteins effect on tumor angiogenesis by creating a strain of mice that develops spontaneous mammary gland tumors in the absence of T-cadherin. Their results appeared March 1 in Cancer Research. Evidence of T-cadherins role in ...

Fire without smoke

... NOx, or nitrogen oxides. In flameless combustion, the oxidation of fuel occurs with a very limited oxygen supply at very high temperature. spontaneous ignition occurs and progresses with no visible or audible signs of the flames usually associated with burning. The chemical reaction zone is quite ...

CSHL scientists part of team that discovers role of rare gene mutations in schizophrenia

... mutation-screening method in studies involving a greater number of patients and in other illnesses. Among other things, he seeks to determine whether spontaneous mutations play as significant a role in schizophrenia as they do in autism, as revealed by a study he co-authored a year ago with CSHL Professor ...

Less can be more, for plant breeders too

... While this trait would be harmful to a wild rice plant, breeders use this genetic trick for hybrid seed production. Originally identified as a spontaneous mutant in a japonica rice variety, the eui1 mutation was introduced into indica varieties by several years of breeding. With an artificial miRNA ...

New insights into the diversity of Creutzfeldt-Jakob disease agents

... disorders characterized by accumulation of an abnormal isoform (PrPSc) of a host-encoded protein (PrPC) in affected tissues. Although considered a spontaneous disorder, the clinicopathological characteristics of sporadic Creutzfeldt-Jakob disease (sCJD) are variable and substantially influenced by a ...

Remarks Prepared for Delivery By Attorney General Michael B. Mukasey At the Ministerial Press Conference

... to join you today for the initialing of the bilateral agreement between Germany and the United States that permits access to biometric data and spontaneous sharing of data about known and suspected terrorists. This is a great achievement, both for its practical benefits and for what it symbolizes. ...

Science, not romance, controls mating at Smithsonian's National Zoo

... This Valentines Day, Cupid wont be making a stop at the Smithsonians National Zoo. Unlike the spontaneous attraction that most humans equate with love and romance, mating and dating at the National Zoo is planned, strategic and science-basedquite an ...

The birth and death of dopamine neurons: A new model for neurodegeneration

... of dopamine neurons. Mice with only a single copy of the foxa2 gene acquire motor deficits and a late-onset degeneration of dopamine neurons. This spontaneous cell death preferentially affects neurons associated with Parkinson disease. This work provides new strategies to generate neurons in the laboratory ...
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(Date:9/21/2014)... team of Stanford researchers has developed a protein therapy ... break away from original tumor sites, travel through the ... the body. , This process, known as metastasis, can ... "The majority of patients who succumb to cancer fall ... Cochran, an associate professor of bioengineering who describes a ...
(Date:9/19/2014)... study multifunctional and specialized spinal cord nerve cells ... Foundation grant in the amount of $680,000 for ... the Department of Biology, OU College of Arts ... the multifunctional and specialized spinal cord nerve cells ... connections they make. Berkowitz will collaborate with ...
(Date:9/19/2014)... A new study shows that legume plants regulate ... cytokininssignaling molecules that are transmitted through the plant ... the number of bacteria-holding nodules in the roots. ... the National Institute for Basic Biology, the Graduate ... Center for Sustainable Resource Science in Japan. ...
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