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Tag: "cause" at biology news

A gene's first 'kiss' sets off that affair known as puberty

...lation. In turn, these rising levels of LH and FSH cause the testes and ovaries to produce the sex hormones testosterone and estradiol, the culprits responsible for the physical changes and emotional baggage of male and female puberty, respectively. "We now have very good evidence that the GPR54 gene and ...

Man and mouse share genome structures

...place methyl groups on histones can, when mutated, cause leukemia. Bernstein hopes to apply the new technology to characterize chromatin structure in leukemic cells and gain insight into the molecular basis of disease. "The human genome still has many surprises lurking within it," said Lander, director of...

UAB scientists discover the origin of a mysterious physical force

...970s, scientists have been trying to establish the cause of a repulsive force occurring between different electrostatically charged molecules, such as DNA and other biomolecules, when they are very close to each other in aqueous media. This force became know as hydration force. Jordi Faraudo, a researcher...

Enzyme, lost in most mammals, is shown to protect against UV-induced skin cancer

In a finding that broadens our insight intothe cause of certain kinds of UV-induced skin cancer, resear...r death ?recognized assunburn of the skin ?and may cause permanent changes in the DNA(mutations) that ultimately can result in the onset of skin cancer.Thus ...

It's not all genetic: Common epigenetic problem doubles cancer risk in mice

...colon cancer's development in the mice. It doesn't cause tumors directly, but it creates an environment whi...ly doubles the risk that the genetic mutation will cause a tumor," says postdoctoral fellow Atsushi Kaneda, Ph.D. "Double the risk may not seem like much, bu...

Dysentery uses 'sword and shield' to cause infection

...es dysentery uses a 'sword and shield' approach to cause infection. According to research published today in Science, the team from Imperial College London and Institut Pasteur, Paris, found that shigella, the bacteria which causes dysentery, is able to invade cells, while stopping any response from the i...

New binding target for oncogenic viral protein

...on may lead to new insights into the pathways that cause cancer. This is an important step to designing new cancer treatment strategies that target these pathways," concluded Dr. Clurman. ...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

...lenge is to figure out which factors are a primary cause of diabetes and which are a consequence, said Dr. ...-birth-weight mice. Did prenatal undernourishment cause the pancreas to not fully develop? The researchers found no difference in pancreas size or numbers o...

Neuronal 'traffic jam' marks early Alzheimer's disease

...e where beta-APP is overexpressed -- those defects cause early failure in cellular transport," he said. "An...urons genetically by introducing mutations know to cause Alzheimer's disease in people, to then test for transport defects, and then study whether those defe...

Mouse brain cells rapidly recover after Alzheimer's plaques are cleared

...also gets usrethinking our theories on how plaques cause nerve cell damage."Prior to the experiment, Holtzman and some other scientists hadregarded plaque damage to nerve cells as a fait accompli--somethingthat the plaques only needed to inflict on nerve cells once. Accordingto Holtzman, the new results su...

Genome of deadly amoeba shows surprising complexity, evidence of lateral gene transfer

... parasitic amoeba Entamoeba histolytica, a leading cause of severe diarrheal disease in developing countrie...0,000 deaths a year -- second only to malaria as a cause of morbidity and mortality from a protist. The disease caused by E. histolytica is called amebiasis....

Key molecule in plant photo-protection identified

...also gets usrethinking our theories on how plaques cause nerve cell damage."Prior to the experiment, Holtzman and some other scientists hadregarded plaque damage to nerve cells as a fait accompli--somethingthat the plaques only needed to inflict on nerve cells once. Accordingto Holtzman, the new results su...

Antarctic ice shelf retreats happened before

...ng air temperatures are believed to be the primary cause of recent dramatic disintegration of ice shelves like Larsen B, the new study suggests that the ocean may play a more significant role in destroying them than previously thought. The University of Durham's, Dr Mike Bentley, one of the leaders of the...

Scientists Replicate Hepatitis C Virus in Laboratory

...A virus in the family Flaviviridae. HCV is a major cause of liver disease in the United States and the world. One in a series of hepatitis viruses, HCV accounts for about 15 percent of acute hepatitis cases, 60 to 70 percent of chronic hepatitis cases, and up to 50 percent of cases of cirrhosis, end-stage ...

Computers to be used to find blueprint for new influenza drug

...s us in bed for a few days. But some outbreaks can cause death on a large scale ?the world-wide outbreak in 1918 killed more people than the First World War itself. We may now be facing another flu outbreak, this time originating from chickens in Asia. “If we are successful, we will have taken important s...

Newly discovered virus linked to childhood lung disorders and Kawasaki disease

...ociated with animportant multi-organ disease whose cause has remained a mystery fordecades, according to articles in the Feb. 15 issue of The Journal ofInfectious Diseases, now available online. The virus is one of thenumerous coronaviruses, most of which infect animals. In humans,coronaviruses have been k...

HIV Patients May Be at Risk of Heart Problems When Taking Protease Inhibitor Drugs

...e HIV-virus infection from progressing to AIDS may cause serious and potentially lethal heart rhythm disturbances in some patients. The finding of a Mayo Clinic-led investigation appears in the current edition of The Lancet. In collaboration with colleagues from the HIV Program of Hennepin County Medical...

Inflammatory molecules released by pollen trigger allergies

...m pollen. These molecules bind to immune cells and cause them to launch a typical allergy-promoting immune response. Pollen from plants exposed to air pollutants produce more of these allergy-provoking compounds than do pollen from unpolluted areas, possibly explaining why allergies are more prevalent in p...

Scientists seek answers on what activates deadly anthrax spores

...om lessons learned from studying the bacteria that cause Staphylococcus infections and two other bacteria in the same group as anthrax. Claiborne said the group proposes that a vitamin B5 derivative known as Coenzyme A plays a crucial role in the germination of the anthrax spores. They have already shown ...

Live Recombinant Adenovirus Vaccine Technique Explored

... using genetically modified adenoviruses, a common cause of respiratory infections. Oral adenovirus vaccines have long been proven to be safe and effective. The researchers believe their process for constructing a replicating live recombinant adenovirus could lead to more economical vaccines that provide l...

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