Climate change isolates Rocky Mountain butterflies
...s of butterflies, need sunlight to generate enough body heat in order to fly, and forests are generally too shady for them and inhibit their ability to move. However, expanding forests are pinching off the Parnassius from their neighbors in nearby meadows. "The risk of local extinction and inbreeding ...Diverse genetic abnormalities lead to NF-κB activation in multiple myeloma
... a blood cell that produces antibodies to help the body fight off infections. Previous research implicates abnormal activation of the NF-κB signaling pathway as a key event in MM pathology. NF-κB target genes are known to be involved in cell proliferation and cell survival. Although there is sig...High blood pressure, low energy -- a recipe for heart failure
...the heart by dilating blood vessels throughout the body to reduce resistance. In the future, doctors might look for diminished energy capacity in the hearts of hypertensive patients and administer drugs that would rev up energy-producing pathways such as those controlled by ERR alpha, according to Kelly. ...X-ray images help explain limits to insect body size
...tudy how beetles' tracheal systems change as their body sizes increase. The team took advantage of richly ... tracheal tubes in four beetle species, ranging in body mass by a factor of 1,000. Overall, they found that larger beetle species devote a disproportionat...Smokeless tobacco more effective than cigarettes for delivering dangerous carcinogens into the body
... means for delivering certain carcinogens into the body through the bloodstream, although cigarette smoke includes a host of carcinogenic products that arent a major factor in smokeless tobacco, Hecht said. The study participants included men and women aged 17 to 80 who had sought but had yet to begin ...No evidence that widely prescribed statins protect against prostate cancer
...shed when researchers considered the patients age, body weight, and history of cardiovascular disease and diabetes. We know that men with higher body mass index, diabetes and cardiovascular disease tend to have lower testosterone levels, and this lar...New molecular regulators of hyperthyroidism and goiter
... important role in determining how much energy the body burns. Thyroid gland functions are regulated by a ...yroidism (characterized by weight loss because the body increases the amount of energy it burns) and goiter. Signals downstream of the receptor for TSH ha...A unique arrangement for egg cell division
...pull one half out of the oocyte into a small polar body that is later discarded. Microtubule spindles are found in all dividing cells. What is special about oocytes is that they lack specialised spindle-forming organelles, called centrosomes, says Jan Ellenberg, Coordinator of the Gene Expression Unit at ...JCI table of contents: Aug. 9, 2007
... important role in determining how much energy the body burns. Thyroid gland functions are regulated by a ...yroidism (characterized by weight loss because the body increases the amount of energy it burns) and goiter. Signals downstream of the receptor for TSH ha...In limiting life span, study finds booming bacteria innocent
...ny types of bacteria during aging, both inside the body and on the surface. It was gradual across their li... span is regulated according to trade-offsthat the body has only so much energy to devote to different processes, Tower said. If you devote a lot [of energy...Role of thyroid hormones in slumber under investigation at Rutgers
...ses cellular activity in nearly all tissues of the body by acting inside cells. Thyroid hormones do so much more than regulate weight. Were really just beginning to learn the true extent of how these hormones impact our overall health, Martin says. The research underway at Rutgers-Camden will build ...Penn researchers discover how key protein stops inflammation
...hen. Bcl-3 appears to take in information from the body and, in response to infection, interferes with p50 degradation to decrease inflammatory response. Inflammation is natural, says Chen. If we didnt respond to infectious agents, bacteria would kill us. However, the inflammatory response must be contr...Research team enlightens the reasons for severe blindness
...ilar transport processes also play a role in other body parts, e.g. in the kidneys. Lebercilin is part of a complex network of proteins which controls ciliary transport processes, or directly take part in them. Disruptions in the cooperation of such molecular networks at the protein interaction level ofte...UF, French scientists seek test to detect gene doping in athletes
...iad of uncertainties, such as which tissues in the body to sample and how to distinguish a doped gene from...ny copies of the EPO gene are found in an athletes body to levels found in the average person who has not been doping. Our research aims to develop the a...Why nectar-feeding bats need a 'power drink' to fly
...y feed at night and can ingest up to 150% of their body weight as nectar. ...How cells change the pace of their steps
...es to the substrate. Different cell types in the body can move at different speeds in response to many different stimuli, and while our collaborative study didnt look at these possibilities per se, we were able for the first time to correlate the mechanical forces related to chemical changes occurring w...Beyond Mesopotamia: A radical new view of human civilization reported in Science
...ed to be the cradle of civilization, but a growing body of evidence suggests that in addition to Mesopotamia, many civilized urban areas existed at the same time about 5,000 years ago in an arc that extended from Mesopotamia east for thousands of kilometers across to the areas of modern India and Pakist...Scientists prove that disputed Korean stem cell line comes from an unfertilized egg and not cloning
...ucleus of an egg is replaced by the nucleus from a body cell. Creation of human ntES are pES are of particular interest to researchers as they may provide stem cells that are nearly genetically identical to the donor and, therefore, particularly well suited for customized, rejection-proof cell transplanta...Discredited Korean embryonic stem cells' true origins revealed
...ng transfer of genetic material from a cell in the body into an egg. Now, research led by Kitai Kim, PhD, and George Q. Daley, MD, PhD, of the Children's Hospital Boston Stem Cell Program demonstrates that the Koreans unwittingly created something entirely different the world's first human embryonic stem...Handicapping tuberculosis may be the way to a better vaccine
... believes he can build a vaccine that prepares the body to recognize TB when infected. If a cell becomes aware that a pathogen has invaded, it can prevent the infection from spreading to other cells by committing cell suicidea process known as apoptosis, where the cell shuts down and is shredded into lit...