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Reversal in Biological News

Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes

... France and Montevideo, Uruguay have developed a method based on time reversal that can reveal the characteristics of soft solids. In a pair of ... a change in mass. The data from preliminary experiments show that time reversal should work in buried pipes. The talk "Detection of structural faults ...

'Undesirable' evolution can be reversed in fish, Stony Brook University scientists show

... University. "This is good news for fisheries, but it also shows that reversal is a slow process," Dr. Conover said. "Over time, fish can return back to their normal size but the reversal process occurs much more slowly than the changes caused by fishing. So the ...

Predatory bacterial swarm uses rippling motion to reach prey

... and move back and forth. This motion of individual cells, known as cell reversal produces an alternating pattern of high and low cell density like crests ... type motion known as cell reversal. The genes that regulate this cell reversal process are chemotaxis-like genes. The UI team mutated two genes in ...

The Rett Syndrome Research Trust launches operations

... website (www.rsrt.org). In the wake of last year's dramatic pre-clinical reversal of Rett symptoms, the Trust has been formed to pursue the next steps ... isolated the MeCP2 protein in 1992, last year published his astonishing reversal of full-blown symptoms in a model of Rett Syndrome. He is the Buchanan ...

Male seahorses are nature's Mr. Mom, Texas A&M researchers say

... sexual traits that pipefish have. Male pregnancy also results in a reversal in sex-related behaviors, Jones said. Females exhibit a competitive ... attribute, he said. His lab studies the evolutionary steps leading to that reversal in behavior and the role that hormones play in the change. Jones lab ...

Male seahorses are nature's Mr. Mom, Texas A&M researchers say

... sexual traits that pipefish have. Male pregnancy also results in a reversal in sex-related behaviors, Jones said. Females exhibit a competitive ... attribute, he said. His lab studies the evolutionary steps leading to that reversal in behavior and the role that hormones play in the change. Jones lab ...

August 2009 Geology and GSA Today media highlights

... to be the warmest period in Earth's history within the past 25 million years, saw a major shift in climate from global warming to cooling. This reversal of climatic warming has proven difficult to understand because of the limited range of available records. The first records of this time interval ...

Caffeic acid inhibits colitis in a mouse model -- is a drug-metabolizing gene crucial?

... colitis increases risk for this disease". In summary, normalization of expression of CYP4B1, a drug metabolizing enzyme possibly related to reversal of inflammatory damage was a hallmark of the efficacy of caffeic acid, a component found widely in plant foods in the human diet, to inhibit ...

April 2009 Geology and GSA Today media highlights

... of the continental self to the more mountainous area of present-day Wrangel Island. Renewed glacial activity during the Antarctic cold reversal and persistence of cold conditions until 11.5 ka in southwestern Patagonia P.I. Moreno et al., Dept. of Ecological Sciences and Institute of ...

HIV-1 protease inhibitor induced oxidative stress in pancreatic B-cells: thymoquinone protection

... component) it is likely that it may act as a mitochondrial antioxidant. Indeed pretreatment of pancreatic beta-cells with thymoquinone caused a reversal of nelfinavir induced deleterious effects. Thymoquinone decreased the production of reactive oxygen species, increased the Cu/Zn SOD and glutathione ...

Rett Syndrome Research Trust advisor makes significant discovery

... could restore the stunted growth of MeCP2-deficient neurons. This finding supports the 2007 Science publication by Professor Adrian Bird showing reversal of Rett symptoms in adult mouse models of the disorder. Results from ongoing in vivo mouse studies deleting MeCP2 in glia are promising in terms of ...

Gene therapy reversed heart damage in heart failure

... was led by Giuseppe Rengo, M.D., a post-doctoral fellow. "The theory is that by inhibiting this kinase, the heart will recover partially due to reversal of the desensitization of the -adrenergic receptors," Dr. Koch said. "The expression of ARKct leads to a negative neurohormonal ...

Plants display 'molecular amnesia'

... Berkeley, have announced a major breakthrough in a developmental process called epigenetics. They have demonstrated for the first time the reversal of what is called epigenetic silencing in plants. The findings are important to develop a better understanding of gene regulation in the ...

Wistar scientists find key to keeping killer T cells in prime shape for fighting infection, cancer

... control compared to either blockade alone. "The goal now is to understand the pathways the receptors control, and then to learn how to fine tune reversal of exhaustion by targeting pathways that selectively control the desired type of T cell response," Wherry says. ...

Physical activity and health: Finding the right prescription

... to the psychosocial aspects of exercise, activity and sports on populations. Specific activities may include: Investigating the prevention or reversal of disease through physical activity and mobility. Applying physical medicine and rehabilitative strategies to tissue injuries in order to restore ...

Is yakult helpful in the treatment of irritable bowel syndrome?

... patterns of IBS patients. After 6 week of treatment with 1 x 65 mL dose of Yakult(R) daily, 9 of 14 patients (64%) completing the study had reversal of ERBHAL, with the median time of first rise increasing from 45 to 75 min (P = 0.03). Furthermore, symptoms improved in those in whom ERBHAL was ...

September Geology and GSA Today media highlights

... are geodynamic linkages between the younger and older oceans that deserve more detailed study; it also suggests that, in the case of Pangea, the reversal in continental motion may have coincided with emergence of a superplume 460? million years ago that produced mantle upwelling in the ancestral ...

Codeine not safe for all breastfeeding moms and their babies

... once they were taken off the morphine tainted breast milk," says Koren. "By removing the exposure, most children will demonstrate a complete reversal of symptoms and show no long-term adverse effects." ...

Light receptors in eye play key role in setting biological clock, study shows

... new line of mutated mice with reduced light sensitivity in their eyes, which rendered them fully active in the day but inactive at night, a complete reversal of the normal activity/rest cycles of mice. "This suggests that we have discovered an additional mechanism for regulating nocturnity and diurnity ...

Coastal management cooperation, enforcement key to avoid pending crisis for millions: UN experts

... at our disposal. Good examples of well-managed coastal environments, and sustainably harvested coastal fisheries occur around the world. The reversal of negative trends and the improvement of water quality in some areas indicate that decline of coastal ecosystems is neither inevitable nor always ...

Coastal management cooperation, enforcement key to avoid pending crisis for millions: U.N. experts

... at our disposal. Good examples of well-managed coastal environments, and sustainably harvested coastal fisheries occur around the world. The reversal of negative trends and the improvement of water quality in some areas indicate that decline of coastal ecosystems is neither inevitable nor always ...

A new gene trigger for pregnancy disorder identified

... then results in a further decrease in 2-ME levels. In the final portion of the study, the authors administered 2-ME to the mice, resulting in a reversal of preeclampsia-like-symptoms. Interestingly, the many diverse factors that have been identified in the recent years as elevated or suppressed in ...

Rockefeller University Press allows authors to retain copyright to their published work

... in full as a condition of publication. The press, which now retains licenses from its authors instead of copyright, made its first move toward policy reversal in July 2000, when it gave authors the right to post their articles on their own Web sites immediately after publication. Since January, 2001, the ...

Baby boys are more likely to die than baby girls

... more baby boys survive, specifically, caesarean sections and the spread of intensive care units for premature babies, the study found. The marked reversal of historical trends indicates that at an age when males and females experience very similar lives, they are very different in their biological ...

Severe asthma may be a different form of the disease

... of Wisconsin in Madison and the lead author of the study, Lung Function in Adults with Stable but Severe asthma: Air Trapping and Incomplete reversal of Obstruction with Bronchodilation. Understanding the pathophysiology of severe asthma and improving its treatment is the goal of SARP. The ...

A link between greenhouse gases and the evolution of C4 grasses

... changes in major terrestrial ecosystems by affecting the distribution of C4-dominated biomes and the affiliated flora and fauna. This implies that a reversal of the conditions that favored C4 plants could potentially lead to their demisea startling prospect if one considers the human races reliance on C4 ...

In promiscuous antelopes, the 'battle of the sexes' gets flipped

... of Jyvskyl in Finland. However, in topi antelopes, where females are known to prefer to mate with males in the center of mating arenas, weve found a reversal of these stereotypic sex roles. Such role reversals may occur in species where females benefit from mating multiply, either because it increases ...

Breakthrough research identifies how cells from pigs may cure diabetes

... Conference president. Research has shown that the transplantation of islet cells, harvested from the pancreas of a pig, yields a long-term reversal of diabetes in monkeys, opening the path to unprecedented new opportunities for human patients with the disease. To oversee immunosuppression issues, ...

Chromosomal abnormalities in sperm higher after vasectomy reversal

... also between the time interval after vasectomy reversal and the total sex chromosome aneuploidy rate ?i.e. the long ago the reversal the better the chances of producing normal sperm. ... importantly, will babies born after vasectomy reversal ?either conceived naturally or by ART ?have ...

Uncovering sex-change secrets of black sea bass

... has teamed with Nardi and GreatBay Aquaculture to study what triggers sex reversal in black sea bass ?and how to prevent it. Berlinsky and his colleagues ... already made progress, determining optimal sex ratios and delaying sex reversal by controlling density," he notes. "We've already made strides toward ...

40,000-year-old skull shows both modern human and Neandertal traits

... Zilhao said: "Such differences raise important questions about the evolutionary history of modern humans. They could be the result of evolutionary reversal or reflect incomplete palaeontological sampling of Middle Paleolithic human diversity. "They could also reflect admixture with Neandertal ...

Reversing cancer cells to normal cells

... study were further confirmed in the human embryonic stem cell model and the chick embryo model - where inhibiting Nodal signaling led to the reversal of the melanoma cells to a more normal cell type. This is a promising area of research, says Dr. Hendrix. The discovery of a new signalizing ...

Prion disease treatable if caught early

... cognitive endpoints. These data now lead to the hope that early intervention in human prion disease will not only halt clinical progression but allow reversal of early behavioral and cognitive abnormalities," wrote the ...

End of deforestation in view? Experts advance new way to size up global forest resources

... have begun to enlarge, as farmers spare land and foresters also shift from extensive to intensive strategies. Says Mr. Ausubel: "This great reversal in land use could stop the styling of a Skinhead Earth and begin a great restoration of the landscape by 2050, expanding the global forest by 10 ...

Pressured by predators, lizards see rapid shift in natural selection

... biology can be studied on short time scales and that predictions about it can be tested experimentally. We predicted, and then demonstrated, a reversal in the direction of natural selection acting on limb length in a population of lizards." Losos and colleagues studied populations of the lizard ...

Fighting like a girl or boy determined by gene in fruit flies

... up on their back legs and snap their forelegs down hard ?sometimes nailing an opponent that is slow to retreat. The flies undergo a major role reversal when the male and female gene versions are switched. With a feminine fruitless gene, male flies adopt more ladylike tactics, mostly the head butt and ...

Therapeutic role found for carbon monoxide

... showed that the gas did indeed reverse PAH in the animals, resulting in the restoration of both normal pressures and heart weights (indicative of reversal of imminent heart failure). The scientists next identified how this was happening. "We determined that CO was exerting these effects by both ...

Alleged 40,000-year-old human footprints in Mexico much, much older than thought

... Feinberg found that the rock grains in the volcanic ash had polarity opposite to the Earth's polarity today. Since the last magnetic pole reversal was 790,000 years ago, the rock must be at least that age. Because the Earth's magnetic polarity changes, on average, every 250,000 years, the ...

Ancient anthropoid origins discovered in Africa

... Seiffert. "This has never been documented in an early anthropoid. The simplest explanation is that Biretia's nocturnality represents an evolutionary reversal from a diurnal ancestor, but that conclusion is based solely on the probable pattern of relationships. If down the road we find out that our ...
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