Cells from human umbilical cord blood help rats recover from stroke faster, new study finds
...as injected into the tail veins of rats previously induced to have symptoms of stroke. The rats showed improvement in movement, balance and reflex responses even when treatment with cord blood cells was begun a week after the onset of the stroke. However, the greatest recovery of function occurred when the......e-wide scale, of the mechanisms of environmentally induced disease processes. Researchers will attempt to better understand how disease occurs; how to identify potential environmental hazards; how to predict potential disease; how to identify exposed individuals; and how to prevent disease. The long-range g...Pleasure boat speed limits can stir up trouble in shallow lakes
...Doppler velocimenter to measure the water velocity induced by passing boats and an optical backscatter sensor to measure the turbidity of the water. Then they passed different watercraft, including inboard and outboard boats, at different speeds and different depths over the instrumented lakebeds. "We d...Brain researchers discover bright side of ill-famed molecule
...roduced by specific types of glial cells, however, induced a strong potentiation of synaptic activity. After his return from the US, Dr. Pfrieger set out to identify the unknown factor and its mode of action with his own research group at the Max-Delbrck-Center for Molecular Medicine in Berlin. Earlier this ...Hidden toxin gene in chlamydia linked to chronic illnesses
... and those changes are indistinguishable from ones induced by the clostridial toxin. Infected cells also contained toxin-encoding RNA, a type of DNA photocopy that shuttles its genetic instructions to the cell's protein-making machinery. The researchers also showed that infected cells contain a protein re...Natural protein helps prevent cancers from spreading to other organs
...ns group studied more than 50 mice. The scientists induced cancer in the mices necks, then removed the tumors two weeks later, using the methods a surgeon would use to remove a tumor from a human. Half the mice then received daily p22 injections; half received a placebo. Two weeks later, the scientists weigh......ogen treatment. Furthermore, the increase in IGF-I induced by GH was also of lower magnitude during the oral ...h hormone treatments, although the meal once again induced a decline in lipid oxidation during both estrogen treatments. However, postmeal lipid oxidation duri...Both shape and size matter in tiny world of nanoparticles
...gular prisms a mere 15 nanometers thick. The light induced the nanospheres to break up into silver atoms, which then fed the growth of the nanoprisms, a process called ripening. The conversion process could be arrested at any point by stopping the light exposure, thus giving the researchers control over the ...Animal study finds embryonic stem cells can repair heart muscle
...answer these questions, the researchers surgically induced myocardial infarctions in two groups of rats, one which was treated with a culture of ES mouse cells, and one treated with a "sham" culture. Prior to transplantation, the cultured ES cells were "marked" with green fluorescent protein and suspended in...CNS cell death in bacterial meningitis
...al. show that AIF activation and cell death can be induced by either of two secreted bacterial factors: hydrogen peroxide and the toxic protein pneumolysin, which forms pores in animal cell membranes. The authors inactivated both of these factors, first by using bacterial strains with specific mutations that...Mice point to genetic basis for obsessive grooming
...groomed more than wild-type mice when grooming was induced by misting the animals with water. And when the scientists produced Hoxb8 -knockout mice that were otherwise genetically different from their initial mutant strain, those mice also showed the same abnormal grooming -- further demonstrating that the ...January media highlights: GEOLOGY and GSA TODAY
...th as well as to predict the consequences of human induced climate change. The Nile River and its annual flood are a unique system in which to study such changes. It is the longest river in the world, spanning four major climatic belts. This study uses 87Sr/86Sr isotopes to determine the relative amounts of ...Adding vitamin C to certain drugs may help treat Alzheimers, other brain disorders
...rm. Using a group of mice that had been chemically induced to have convulsions, the researchers injected the normal molecule into the mice. This had no effect on their convulsions. When a vitamin C modified version of the drug was injected, convulsions were delayed, demonstrating the improved performance of ...Respiratory activation in patients with obstructive sleep apnea syndrome (OSA)
...quence was repeated 10 timnes. Hypoxia was rapidly induced by having the subject breathe one or two breaths of 100 percent nitrogen followed by continuous eight percent O2 for three minutes to maintain hypoxia (O2 saturation: 80-84 percent). Care was taken to ensure that arterial CO2 pressure remained consta...... few of the homozygotes would have signs of damage induced by the excess iron," he says. "Dr. Felitti, my collaborator from Kaiser, and I were quite surprised to find that this was true only in a very small proportion of the people who carry the mutation." "Our findings recently have been confirmed," he add...How vitamin C prevents cancer--but apples are better
...of gap-junction intercellular communication (GJIC) induced by hydrogen peroxide," says Lee. GJIC is essentia...amin C, the researchers report, inhibition of GJIC induced by hydrogen peroxide was prevented. Although vitamin C protects against oxidative DNA damage through...DNA arrays give clues to better vaccines
...bacterial components, such as proteins and sugars, induced activation. "These findings will help researchers ...he shared macrophage activation program, which was induced by a wide range of bacteria, including Gram-positive, Gram-negative, and mycobacteria. While the act...Pheromones control sex discrimination in mice
...when the animal received one type of pheromone, it induced mating and another induced aggression," said Dulac. To better understand the VNO, the scientists produced knockout mice that la...Cell interactions in spermatocyte apoptosis
... prior to meiosis, since the Fas ligand protein is induced specifically in diploid and tetraploid cells but is not found at heightened levels in the surviving population of haploid spermatids, and the latter cells do not show nuclear condensation or fragmentation, the usual hallmarks of apoptotic cells. The ......nguish this response from the better known pathway induced by HGF. Mutations in the human polycystin-1, or in the interacting protein polycystin-2, are the most frequent cause of polycystic kidney disease, indicating that these two proteins are required for normal kidney cell proliferation and for the struct...