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Tag: "harmful" at biology news

Scientists ID molecular 'switch' in liver that triggers harmful effects of saturated and trans fats

...ists led by Bruce Spiegelman, PhD, report that the harmful effects of saturated and trans fats are set in mot...ts. The researchers report that when activated by harmful fats, PGC-1beta alters liver metabolism through a cascade of biochemical signals. The result is an u...

Research advances quest for HIV-1 vaccine

...rategy for protecting humans from many potentially harmful viruses. However, designing a suitable vaccine for HIV-1 has been a highly challenging and thus far unsuccessful endeavor. HIV-1 is enormously variable and it has been difficult to isolate antibodies that will recognize the many different strains of ...

Antibiotic Resistant Bacterium Uses Sonar-like Strategy to “See?Enemies or Prey

...ts.Scientist have known since 1934 that especially harmful strains ofEnterococcus produce a toxin that destroys other cells, including humancells and even other types of bacteria. They also knew that this toxinwas made only under some conditions. Until Gilmore’s study, scientistswere unable to explain how th...

Probing The Promise And Perils Of Nanoparticles

...nsumer products has raised concerns about possible harmful effects of the miniscule materials. Scientists at the University of Michigan are addressing those concerns by investigating how certain kinds of nanoparticles damage cell membranes—enough to cause cell death in some cases—and how the damage can be pr...

New SARS Protein Linked To Important Cell Doorway

...onaviruses. Because those viruses typically aren't harmful to humans, researchers suspect a gene in the SARS accessory genome may be providing the virus with most of its pathogenic punch. Their computerized search highlighted a section of the SARS genetic code that shared several features with immune evasio...

UCLA scientists transform HIV into cancer-seeking missile

...m itself at a precise location, thereby minimizing harmful side effects," explained Irvin S.Y. Chen, Ph.D., d...d genetic diseases where the mutations exert their harmful effects on the body." Melanoma is a serious form of skin cancer. According to the American Cancer S...

White blood cell waste disposal system plays critical regulatory role

...e blood and roam the body in search of potentially harmful foreign substances. Neutrophils have a short lifespan and often die via a programmed cell death pathway called apoptosis within a matter of hours. Dying neutrophils are recognized and ingested by cells in the body tissues called phagocytes. Although...

Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin

... accessible than MRI-based methods and free of the harmful side effects associated with radioactivity. In this imaging system, the flourophores can also be tuned to respond to different wavelengths of near-infrared light. This sets the stage for using emissive polymersomes to target multiple cancer cell-surf...

Sexual cooperation: Mating increases longevity in ant queens

...undity directly after mating, but they can be very harmful to females, whose lifespan and future reproductive output can be drastically reduced. New findings suggest that in some social insects--in which both sexes ultimately benefit from long, successful reproductive lives of females--sexual cooperation, ra...

New Insights Into HIV Immunity Suggest Alternative Approach to Vaccines

...se during vaccination, if these antibodies are not harmful to those being vaccinated," Haynes said. "We now have a window into how to study HIV vaccines from the host side of the problem," he said. Collaborators on the study include Judith Fleming, William St. Clair, Richard Scearce, Kelly Plonk, Herman St...

How the environment could be damaging men's reproductive health

... mothers who smoked or who worked in a potentially harmful environment where they might be exposed to heat, v...4.9% to 7.13% for mothers working in a potentially harmful environment. "Although this increased risk was not statistically significant, it suggests that envi...

PET/MRI scans may help unravel mechanisms of prenatal drug damage

...blood flow is one of the mechanisms underlying the harmful effects of cocaine exposure during pregnancy. The research was funded by the Office of Biological and Environmental Research within the Department of Energy's Office of Science and the National Institute on Drug Abuse. The monkeys were obtained from...

Probing the promise and perils of nanoparticles

...nsumer products has raised concerns about possible harmful effects of the miniscule materials. Scientists at the University of Michigan are addressing those concerns by investigating how certain kinds of nanoparticles damage cell membranes---enough to cause cell death in some cases---and how the damage can b...

Substance protects resilient staph bacteria

...has, for the first time, been shown to protect the harmful pathogen from natural human defense mechanisms that would otherwise kill the bacteria, according to scientists at the Rocky Mountain Laboratories (RML), part of the National Institute of Allergy and Infectious Diseases (NIAID) of the National Institu...

Scientists discover how plants disarm the toxic effects of excessive sunlight

...y. For example, too much sunlight can actually be harmful to plants, because the heightened photosynthetic a...e-tune the design of these systems to minimize the harmful effects of singlet oxygen and enhance energy production." Reactive oxygen also plays an important r...

Gene therapy promising for growing tooth-supporting bone

...to wounds. Giannobile said using a virus, with the harmful effects turned off, harnesses the virus' ability to enter into cells and use their genetic machinery. Once inside the cell, the viruses help BMP-7 genes get where they need to be in the host's cells to boost bone production. Gene expression producin...

To control germs, scientists deploy tiny agents provocateurs

...titute several species of bacteria and can be both harmful and beneficial. In one role, biofilms can coat plant roots and symbiotically aid ecological processes such as nitrogen fixation. But at the darker end of the scale, biofilms can form infection-inducing layers on implanted medical devices and cause de...

Harmful chemicals may reprogram gene response to estrogen

New research shows that exposure to harmful chemicals and drugs during critical developmental ...sk. Until now, scientists thought that exposure to harmful agents in the environment caused damage to the gene. This study, however, indicates that an environm...

Yeast Network Prevents Damage By Oxygen Radicals

...enter. "And increased ROS is almost certainly more harmful in cells with acquired mutations in other genes in the network. However the connections we've found might point to new strategies, like dietary supplements, that will alleviate some of the clinical symptoms of human diseases associated with genetic d...

White Blood Cell 'Waste Disposal' System Plays Critical Regulatory Role

...e blood and roam the body in search of potentially harmful foreign substances. Neutrophils have a short lifespan and often die via a programmed cell death pathway called apoptosis within a matter of hours. Dying neutrophils are recognized and ingested by cells in the body tissues called phagocytes. Although...

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