Tag: "type" at biology news

Hepatitis B drug can compromise HIV treatment

...researchers test viral replication inside the same type of immune system T cell that the virus naturally infects. This system is an extremely sensitive and reliable way to measure inhibition of HIV replication, said Siliciano. And when we applied it to test the effects of entecavir, we found the drug di...

The mouflons of the Kerguelen archipelago

...ffer residents the opportunity to hunt mouflons (a type of wild sheep). A pair of Corsican mouflons was imported from the Vincennes Zoo in Paris. Initially, the mouflon population grew exponentially, and then, from the early 1980s, it fluctuated between 300 and 700 individuals. The history of a fascin...

New tumor markers -- 'Spot the differences'

...on they receive from their surroundings, each cell type sends only specific messages at any one time. While in normal cells this process is carried out following an organized pattern, this pattern of messages changes completely in cancer cells. When pancreatic cells transform into cancer cells, they aband...

Another sexual attraction is possible ...

...ng types of males coexist within this species: one type communicates with the so-called "E" pheromone whil...d groups of individuals sharing the same pheromone type but differing in their overall genetic relatedness with the "pure" races, and, conversely, groups of...

Tips from the Journals of the American Society for Microbiology

...accine incorporating the human parainfluenza virus type 3 (HPIV3), a common pediatric respiratory pathogen, and administered it by respiratory route to rhesus monkeys. Some monkeys were immunized once and others twice, then all were challenged with a highly lethal dose of the Ebola virus. Results showed...

Does stimulant treatment for ADHD increase risk of drug abuse?

... to measure the levels of dopamine D2 receptors, a type of brain receptor important for experiencing reward and pleasure that has been linked to pleasure and drug abuse. After the eight-month treatment, animals were also tested for their propensity to self-administer cocaine. Rats given the 2mg/kg dose ...

Reconstructing the biology of extinct species: A new approach

...environment -- should be irrevocably linked to the type of locomotion produced by its limbs. "If an animal evolves a new way of moving about the world, its organ of balance must evolve accordingly," Walker explains. From the visual information, the animal tracks its position relative to stationary objec...

Potato wart eyed as risk to potato production

...n make this disease especially problematic for any type of cultivated potato production, including small garden plots and subsistence farming to extensive land areas economically dependent on commercial production of potatoes for consumption or for potato seed production. "Potato wart is much easier to ...

Fat fish put obesity on the hook

...aused obesity in zebrafish by introducing the same type of genetic mutation that causes severe obesity in ...g, but not limited to: hypertension, dyslipidemia, type 2 diabetes, coronary heart disease, stroke, gallbladder disease, osteoarthritis, sleep apnea and res...

Inflammation is at the origin and progression of diseases such as diabetes or cancer

... sclerosis, Alzheimers disease and, most recently, type 2 diabetes and cancer, are diseases that have been...se. Inflammation is also linked to obesity and type 2 diabetes. The presence of excessive fat activates the production of cytokines, proteins involved i...

Potent possibilities for parasite attack

... parasite genes are important in determining which type of disease develops after infection and the host genome plays a major role in clinical outcome." The results picked up another surprising finding: the team could assign a function to only one-third of the 200 genes restricted to one or two of the s...

St. Jude study yields secrets of chromosome movement

... Chp1 and works closely with RDRC. RDRC produces a type of genetic material called double-stranded RNA, which an enzyme, called dicer, then chops into smaller pieces called small interfering RNA (siRNA). siRNA is bound by RITS, and in turn, helps RITS to reinforce the centromeric heterochromatin and keep ...

Mucosal-surface immune function discoveries could boost vaccine research

...issue of Immunity. The new research focused on a type of protective immune system antigen called immunoglobulin A (IgA), which is produced by immune system B cells. In humans, IgA takes two forms -- IgA1 and IgA2. IgA2, especially, is found in high concentrations along mucosal sites wherever friendly...

Pre-cancerous blood diseases can be products of their environment

...t can make the blood cells become abnormal, like a type of pre-leukemic disease, said Louise Purton, who is affiliated with Peter MacCallum Cancer Centre in Australia, Massachusetts General Hospital, and the Harvard Stem Cell Institute. Such pre-cancerous conditions are often difficult to treat in humans,...

Cytokine resistance contributes to pathology of type 2 diabetes

...ammatory response plays a role in the pathology of type 2 diabetes. Type 2 diabetes is classified as a m...e response, is chronically elevated in people with type 2 diabetes. While the pro-inflammatory pathways of type 2 diabetes have received much attention, the...

JCI table of contents: June 14, 2007

...esistance is a major factor in the pathogenesis of type 2 diabetes and is strongly associated with obesity...excellent therapeutic targets for the treatment of type 2 diabetes. TITLE: Overexpression of uncoupling protein 3 in skeletal muscle protects against fat-...

LIAI researchers identify a potential role for retinoic acid in autoimmune and inflammatory diseases

...d affect the number of pro-inflammatory T cells, a type of white blood cell responsible for several autoimmune and inflammatory diseases. The finding is an important first step that, if eventually found to be true in humans, points to the potential of a new avenue of therapies using retinoic acid to trea...

Small, self-controlled planes combine plant pathology and engineering

...re entire microbial populations in the atmospherea type of research he calls aerogenomics. One of the species we collected with our autonomous UAVs appears to be a bacterium known only to exist in a cavern in Arizona, he said. What was that bacterium doing 100 meters above Kentland Farm" In many of our ...

UVa-led team uncovers important secret in gene replication

...een done without NIH funding, Dutta stressed. This type of basic research is not funded by the pharmaceutical firms or the biotech firms. We are all anxious because later this summer we will find out if we will receive the money to study the remaining the 99 percent of the human genome. If the next port...

Study suggests other causes for childhood brain aneurysms

...ysms, Todd Abruzzo, MD, found that the most common type of aneurysm among all age groups appeared to occur spontaneouslywith no related trauma or infection, recognizable clinical warnings signs or underlying medical causes, such as vascular malformations. Researchers say this data suggests unknown genet...

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