Tag Archives: institute

New factor to control oncogene-induced senescence discovered

The researchers who participated in this international research are: Marta Cascante and Vitaly Selivanov, from the Department of Biochemistry and Molecular Biology of the Faculty of Biology of the UB and the Institute of Biomedicine of the University of Barcelona (IBUB), affiliated to the campus of International excellence Barcelona Knowledge Campus (BKC) ; Liang Zheng and Eyal Gottlieb, from Beatson Institute for Cancer Research (Scotland), and Joanna Kaplon and Daniel S. Peeper, from the Netherlands Cancer Institute, among other experts. Cellular senescence: a ‘brake’ to cell division Cellular senescence, formally described more than four decades ago by Paul Moorhead and Leonard Hayflick, is a tumour suppression mechanism which limits cell’s ability to proliferate. This process works as a ‘brake’ for tumour genesis and can be an answer to several factors (oncogene, oxidative stress, telomere alterations, etc.) Professor Marta Cascante, head of the Consolidated Research Group on Integrative Systems Biology, Metabolomics and Cancer of the UB honoured with the ICREA Academia Award 2010, explains that "as a response to an oncogene mutation, cell can activate its protection mechanisms and get into a phase so-called ‘oncogene-induced senescence’ which acts as a key tumour suppressive mechanism. …

Poliovirus vaccine trial shows early promise for recurrent glioblastoma

The treatment, developed at Duke and tested in an ongoing phase 1 study, capitalizes on the discovery that cancer cells have an abundance of receptors that work like magnets drawing the poliovirus, which then infects and kills the cells. The investigational therapy, known as PVSRIPO, uses an engineered form of the virus that is lethal to cancer cells, while harmless to normal cells. …

After a decade, global AIDS program looks ahead

The decade-old law that transformed the battle against HIV and AIDS in developing countries is at a crossroads. The dream of future generations freed from epidemic is running up against an era of economic recovery and harsh budget cuts. The President's Emergency Plan for AIDS Relief grew out of an unlikely partnership between President George W. Bush and lawmakers led by the Congressional Black Caucus. It has come to represent what Washington can do when it puts politics aside - and what America can do to make the world a better place. President Barack Obama, speaking at the recent dedication of Bush's presidential library, praised the compassion Bush showed in “helping to save millions of lives and reminding people in some of the poorest corners of the globe that America cares.” House Democratic leader Nancy Pelosi said of Bush in a statement that “while many events may distinguish his presidency, his devotion to combatting the scourge of HIV/AIDS will certainly define his legacy.” The AIDS program's future, however, is uncertain. Obama has upped the stakes, speaking in his State of the Union address this year of “realizing the promise of an AIDS-free generation.” But funding for the relief plan's bilateral efforts has dipped in recent years and it's doubtful that Congress, in its current budget-cutting mood, will reverse that trend when the current five-year program expires later this year. The AIDS program is also trying to find a balance between its goals of reaching more people with its prevention and treatment programs and turning over more responsibility to the host nations where it operates. “This has been an incredible achievement,” said Rep. Barbara Lee, D-Calif., a senior Congressional Black Caucus member who played major roles both in passing the original 2003 act and its 2008 renewal that significantly increased funding for AIDS, malaria and tuberculosis treatment in Africa and other areas of the developing world. She spoke of the more than 5 million people now receiving life-saving antiretroviral treatment and 11 million pregnant women who received HIV testing and counseling last year. “But I'm worried that with any type of level-funding or cuts we'll go backward,” she said. The 2008 act more than tripled funding from the 2003 measure, approving $48 billion over five years for bilateral and global AIDS programs, malaria and tuberculosis. It also ended U.S. policy making it almost impossible for HIV-positive people to get visas to enter the country. The AIDS program was the largest commitment ever by a nation to combat a single disease internationally. According to the U.N.'s UNAIDS and the Kaiser Family Foundation, in 2011 the United States provided nearly 60 percent of all international AIDS assistance. A decade ago, almost no one in sub-Saharan Africa was receiving antiretroviral treatment. By 2008, the AIDS program had boosted that number to 1.7 million. As of last year it was 5.1 million. The State Department says the program last year also helped provide treatment to some 750,000 HIV-positive pregnant women, allowing about 230,000 infants to be born HIV-free, supported 2 million male circumcisions and directly supported HIV testing and counseling for 46.5 million. “This is a remarkable story that the American people should know about,” Kimberly Scott of the Institute of Medicine, which recently completed an evaluation of the AIDS program, said at a forum sponsored by the Kaiser Family Foundation and the CSIS Global Health Policy Center. According to UNAIDS, the number of people living with HIV has leveled off, standing at about 34 million at the end of 2011. New infections that year reached 2.5 million, down 20 percent from 2001. AIDS-related deaths were 1.7 million, down from 2.3 million in 2005. Jennifer Kates, director of global health and HIV policy at Kaiser, said most countries where the program operates have yet to reach the “tipping point,” where new infections occurring in a year are less than the increase in people receiving treatment. Among the success stories were Ethiopia, where the 40,000 going on treatment in 2011 was almost four times the new infections. Still with a long way to go was Nigeria, which that year had 270,000 new HIV infections and a 57,000 increase in those getting treatment. Chris Collins, director of public policy at amfAR, The Foundation for AIDS Research, also warned of potential repercussions as the AIDS program shifts from being an emergency response to the AIDS epidemic to a more supportive role for country-based health programs. “The countries themselves largely are avoiding the important role that key populations play in epidemics,” he said, referring to gay men, those injecting drugs and sex workers. These groups face discrimination and criminal charges in many cases, and 90 percent of the money to help them now comes from external sources. Collins also spoke of the “huge mismatch” between the positive science and rhetoric on fighting AIDS and the money available. Since 2009 the funding for bilateral and global HIV and AIDS programs has largely stalled. Kaiser's Kates said that while there's still bipartisan support for the AIDS program in Congress, “the big question is will the financing be there to reach the goals” of treating more people and advancing toward that AIDS-free generation. “The challenge right now is that the global economic climate is different, the U.S. climate is different, but the need is still great.”source : http://www.foxnews.com/health/2013/05/21/after-decade-global-aids-program-looks-ahead/

Timing of cancer radiation therapy may minimize hair loss

The study, which appears in the early online edition of the Proceedings of the National Academy of Sciences (PNAS), found that mice lost 85 percent of their hair if they received radiation therapy in the morning, compared to a 17 percent loss when treatment occurred in the evening. The researchers, from the Salk Institute for Biological Studies, the University of Southern California (USC) and the University of California, Irvine (UCI), worked out the precise timing of the hair circadian clock, and also uncovered the biology behind the clockwork — the molecules that tells hair when to grow and when to repair damage. They then tested the clock using radiotherapy. …

Genetic diversity within tumors predicts outcome in head and neck cancer

"Our findings will eventually allow better matching of treatments to individual patients, based on this characteristic of their tumors," says Edmund Mroz, PhD, of the MGH Center for Cancer Research, lead author of the Cancer report. "This method of measuring heterogeneity can be applied to most types of cancer, so our work should help researchers determine whether a similar relationship between heterogeneity and outcome occurs in other tumors." For decades investigators have hypothesized that tumors with a high degree of genetic heterogeneity — the result of different subgroups of cells undergoing different mutations at different DNA sites — would be more difficult to treat because particular subgroups might be more likely to survive a particular drug or radiation or to have spread before diagnosis. While recent studies have identified specific genes and proteins that can confer treatment resistance in tumors, there previously has been no way of conveniently measuring tumor heterogeneity. …

What do we eat? New food map will tell us

Do your kids love chocolate milk? It may have more calories on average than you thought. Same goes for soda. Until now, the only way to find out what people in the United States eat and how many calories they consume has been government data, which can lag behind the rapidly expanding and changing food marketplace. Researchers from the University of North Carolina at Chapel Hill are trying to change that by creating a gargantuan map of what foods Americans are buying and eating. Part of the uniqueness of the database is its ability to sort one product into what it really is - thousands of brands and variations. Take the chocolate milk. The government long has long classified chocolate milk with 2 percent fat as one item. But the UNC researchers, using scanner data from grocery stores and other commercial data, found thousands of different brands and variations of 2 percent chocolate milk and averaged them out. The results show that chocolate milk has about 11 calories per cup more than the government thought. The researchers led by professor Barry Popkin at the UNC School of Public Health, are figuring out that chocolate milk equation over and over, with every single item in the grocery store. It's a massive project that could be the first evidence of how rapidly the marketplace is changing, and the best data yet on what exact ingredients and nutrients people are consuming. That kind of information could be used to better target nutritional guidelines, push companies to cut down on certain ingredients and even help with disease research. Just call it “mapping the food genome.” “The country needs something like this, given all of the questions about our food supply,” says Popkin, the head of the UNC Food Research Program. “We're interested in improving the public's health and it really takes this kind of knowledge.” The project first came together in 2010 after a group of 16 major food companies pledged, as part of first lady Michelle Obama's campaign to combat obesity, to reduce the calories they sell to the public by 1.5 trillion. The Robert Wood Johnson Foundation agreed to fund a study to hold the companies accountable, eventually turning to UNC with grants totaling $6.7 million. Aided by supercomputers on campus, Popkin and his team have taken existing commercial databases of food items in stores and people's homes, including the store-based scanner data of 600,000 different foods, and matched that information with the nutrition facts panels on the back of packages and government data on individuals' dietary intake. The result is an enormous database that has taken almost three years so far to construct and includes more detail than researchers have ever had on grocery store items - their individual nutritional content, who is buying them and their part in consumers' diets. The study will fill gaps in current data about the choices available to consumers and whether they are healthy, says Susan Krebs-Smith, who researches diet and other risk factors related to cancer at the National Cancer Institute. Government data, long the only source of information about American eating habits, can have a lag of several years and neglect entire categories of new types of products - Greek yogurt or energy drinks, for example. With those significant gaps, the government information fails to account for the rapid change now seen in the marketplace. Now more than ever, companies are reformulating products on the fly as they try to make them healthier or better tasting. While consumers may not notice changes in the ingredient panel on the back of the package, the UNC study will pick up small variations in individual items and also begin to be able to tell how much the marketplace as a whole is evolving. “When we are done we will probably see 20 percent change in the food supply in a year,” Popkin says. “The food supply is changing and no one really knows how.” For example, the researchers have found that there has been an increase in using fruit concentrate as a sweetener in foods and beverages because of a propensity toward natural foods, even though it isn't necessarily healthier than other sugars. While the soda and chocolate milk have more calories on average than the government thought, the federal numbers were more accurate on the calories in milk and cereals. Popkin and his researchers are hoping their project will only be the beginning of a map that consumers, companies, researchers and even the government can use, breaking the data down to find out who is eating what and where they shop. Is there a racial divide in the brand of potato chips purchased, for example, and what could that mean for health? Does diet depend on where you buy your food - the grocery store or the convenience store…

Swine flu found in elephant seals

The H1N1 virus strain that caused a 2009 swine flu outbreak in humans was detected in northern elephant seals off the coast of central California. Scientists say this is the first time marine mammals have been found to carry the H1N1 flu strain, which originated in pigs. The seals seem to have picked up the virus while at sea, but it's unclear how this happened. “We thought we might find influenza viruses, which have been found before in marine mammals, but we did not expect to find pandemic H1N1,” Tracey Goldstein, an associate professor with the UC Davis One Health Institute and Wildlife Health Center, said in a statement. [10 Deadly Diseases That Hopped Across Species] “H1N1 was circulating in humans in 2009,” Goldstein added. “The seals on land in early 2010 tested negative before they went to sea, but when they returned from sea in spring 2010, they tested positive. So the question is where did it come from?” Contact with humans carrying the virus is unlikely when the elephant seals are at sea, because the creatures spend most of their time looking for food in a remote part of the northeast Pacific Ocean off the continental shelf. Exposure could have occurred through feces dumped out of shipping vessels passing through this area. The researchers noted in their report in the journal PLOS ONE this week that H1N1 has been detected in stool samples of hospital patients. Another possible avenue of transmission might have been contact with aquatic birds, thought to be reservoirs for other flu viruses, the researchers say. Goldstein and colleagues tested nasal swabs from more than 900 Pacific marine mammals from 10 different species from Alaska to California between 2009 and 2011. The elephant seals that were studied had been satellite tagged and tracked so that researchers could tell where they had been before and after they were tested for disease. H1N1 was detected in two northern elephant seals within days of their return to land after they went out to sea to forage for a few months. Antibodies to the virus were found in another 28 elephant seals. None of the seals had any signs of illness, which means marine mammals can be infected with zoonotic pathogens but be asymptomatic, the researchers said. The report recommends that people working with and around marine mammals need to take proper biosafety precautions to prevent exposure to diseases that could be quite harmful in humans, even if they don't cause illness in seals. The new research on marine mammals is part of an effort to understand emerging viruses in animals and people by the Centers of Excellence in Influenza Research and Surveillance program, funded by the National Institutes of Health. “The study of influenza virus infections in unusual hosts, such as elephant seals, is likely to provide us with clues to understand the ability of influenza virus to jump from one host to another and initiate pandemics,” Adolfo Garcia-Sastre, a professor of microbiology, said in a statement. Garcia-Sastre directs of the Global Health and Emerging Pathogens Institute at the Icahn School of Medicine, which collaborated with the team from UC Davis on the study. Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.source : http://www.foxnews.com/health/2013/05/20/swine-flu-found-in-elephant-seals/

Consumer group flags high SPF ratings on sunscreen as misleading

WASHINGTON – & Sunbathers headed to the beach this summer will find new sunscreen labels on store shelves that are designed to make the products more effective and easier to use. But despite those long-awaited changes, many sunscreens continue to carry SPF ratings that some experts consider misleading and potentially dangerous, according to a consumer watchdog group. A survey of 1,400 sunscreen products by the Environmental Working Group finds that most products meet new federal requirements put in place last December. The rules from the Food and Drug Administration ban terms like “waterproof,” which regulators consider misleading, and require that sunscreens filter out both ultraviolet A and B rays. Previously some products only blocked UVB rays, which cause most sunburn, while providing little protection against UVA rays that pose the greatest risk of skin cancer and wrinkles. Despite that broader protection, one in seven products reviewed by the watchdog group boasted sun protection factor, or SPF, ratings above 50, which have long been viewed with skepticism by experts. In part, that's because SPF numbers like 100 or 150 can give users a false sense of security, leading them to stay in the sun long after the lotion has stopped protecting their skin. Many consumers assume that SPF 100 is twice as effective as SPF 50, but dermatologists say the difference between the two is actually negligible. Where an SPF 50 product might protect against 97 percent of sunburn-causing rays, an SPF 100 product might block 98.5 percent of those rays. “The high SPF numbers are just a gimmick,” says Marianne Berwick, professor of epidemiology at the University of New Mexico. “Most people really don't need more than an SPF 30 and they should reapply it every couple of hours.” Berwick says sunscreen should be used in combination with hats, clothing and shade, which provide better protection against ultraviolet radiation. Some dermatologists say there may be some rationale for using higher SPF sunscreens, since users often don't apply enough of the lotion to get its full effect. “The challenge is that beyond 50 the increase in UV protection is relatively small,” says Dr. Henry Lim, chair of dermatology at the Henry Ford Hospital in Detroit. The SPF number indicates the amount of sun exposure needed to cause sunburn on sunscreen-protected skin compared with unprotected skin. For example, a SPF rating of 30 means it would take the person 30 times longer to burn wearing sunscreen than with exposed skin. There is a popular misconception that the SPF figure relates to a certain number of hours spent in the sun. However this is incorrect, since the level of exposure varies by geography, time of day and skin complexion. The FDA itself said in 2011 that “labeling a product with a specific SPF value higher than 50 would be misleading to the consumer.” At the time the agency proposed capping all SPF values at 50 because “there is not sufficient data to show that products with SPF values higher than 50 provide greater protection for users.” But regulators have faced pushback from companies, including Johnson & Johnson, which argue that higher SPF products provide measurable benefits. As a result, the FDA says it is still reviewing studies and comments submitted by outside parties, and there is no deadline for the agency to finalize an SPF cap. It took the agency decades to put in place last year's sunscreen changes. FDA first announced its intent to draft sunscreen rules in 1978 and published them in 1999. The agency then delayed finalizing the regulations for years until it could address concerns from both industry and consumers. The FDA is also reviewing the safety of effectiveness of spray-on products, which use different formulations from other sun-protection solutions. Among other concerns, the agency is looking at whether the sprays can be harmful when inhaled. The survey by the Environmental Working Group found that one in four sunscreens sold in the U.S. is a spray product. “People like the sprays because they are quick to put on and cover a lot of area,” said Dr. Darrell Rigel, a dermatologist in New York.  ”The downside is that you usually have to apply two coats.” More than 76,000 men and women in the U.S. will be diagnosed with melanoma this year and 9,480 are expected to die from the aggressive form of skin cancer, according to the National Cancer Institute. The disease, which is often linked to ultraviolet exposure, is usually curable when detected early.source : http://www.foxnews.com/health/2013/05/20/consumer-group-flags-high-spf-ratings-on-sunscreenas-misleading/