The ghrelin hormone not only stimulates the brain giving rise to an increase in appetite, but also favours the accumulation of lipids in visceral fatty tissue, located in the abdominal zone and considered to be the most harmful. This is the conclusion of research undertaken at Metabolic Research Laboratory of the University Hospital of Navarra, published recently in the International Journal of Obesity.
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Scientists have called it “junk DNA.” They have long been perplexed by these extensive strands of genetic material that dominate the genome but seem to lack specific functions. Why would nature force the genome to carry so much excess baggage? Now researchers from Princeton University and Indiana University who have been studying the genome of a pond organism have found that junk DNA may not be so junky after all.
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The ability to mount an immune response to influenza A (H1N1) infection is significantly compromised by a low level of arsenic exposure that commonly occurs through drinking contaminated well water, scientists at the Marine Biological Laboratory (MBL) and Dartmouth Medical School have found.
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Researchers at the University of Southern California (USC) have identified a critical molecular mechanism that allows the influenza virus to evade the body’s immune response system. The study will be published in the May 21 issue of the journal Cell Host & Microbe. “We have found a mechanism that the influenza virus uses to inhibit the body’s immune response that emphasizes the vital role of a certain protein in defending against viruses,”,” says Jae Jung, Ph.D.
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Most cancers are rare in people with Down syndrome, whose overall cancer mortality is below 10 percent of that in the general population. Since they have an extra copy of chromosome 21, it’s been proposed that people with Down syndrome may be getting an extra dose of one or more cancer-protective genes.
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Florida Atlantic University researcher Dr. Jianning Wei, assistant professor of biomedical sciences in the Charles E. Schmidt College of Biomedical Science at FAU, has received a grant from the National Institutes of Health (NIH) to further her research into the molecular mechanisms of Huntington’s disease (HD). Named after American physician George Huntington, HD is a highly complex genetic, neurological disorder that causes certain nerve cells in the brain to waste away.
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AnaSpec has introduced a wide selection of membrane potential fluorescent probes. The plasma membrane of a cell typically has a transmembrane potential of approximately -70 mV (negative inside) as a consequence of K+, Na+ and Cl- concentration gradients that are maintained by active transport processes.
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Miltenyi Biotec announces the worldwide and exclusive release of Myelin Removal Beads. Myelin is a specialized membrane which ensheathes and insulates axons in the peripheral and central nervous system. During preparation of single-cell suspensions, myelin membrane fragments represent the major contaminant. “When dissociating adult neural tissue, usually less than 5 percent of the cell suspension consists of cells. The rest corresponds to cell debris”, explains Dr.
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Behavioural ecologists working in Bolivia have found that wild spider monkeys control their diets in a similar way to humans, contrary to what has been thought up to now. Rather than trying to maximize their daily energy intake, the monkeys tightly regulate their daily protein intake, so that it stays at the same level regardless of seasonal variation in the availability of different foods.
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When cells cannot carry out the tasks required of them by our bodies, the result is disease. Nanobiotechnology researchers are looking for ways to allow synthetic systems take over simple cellular activities when they are absent from the cell. This requires transport systems that can encapsulate medications and other substances and release them in a controlled fashion at the right moment.
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