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Research Reveals What Drives Lung Cancer's Spread
A new study by researchers at Memorial Sloan-Kettering Cancer Center (MSKCC) reveals the genetic underpinnings of what causes lung cancer to quickly metastasize, or spread, to the brain and the bone the two most prominent sites of lung cancer relapse. The study will be published online in the journal Cell on July 2.
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N.C. Bill Gives Students 'Vital Access' To Accurate Sex Education Instruction, Editorial States
A bill (S. 221) approved by the North Carolina Legislature that would require a public school sex education curriculum covering abstinence, contraception and sexually transmitted infections "will be the most comprehensive and science-based approach the state has used" for sex education, a Charlotte Observer editorial states, adding that Gov. Bev Perdue (D) "should sign it." The bill would require all public school districts in the state to teach a curriculum that focuses on abstinence but also includes information on preventing pregnancy and STIs. Parents would be able to have their children removed from the comprehensive portions of instruction. According to the editorial, the measure "still gives parents a choice in deciding what kind of sex education their children will receive." The editorial adds, "It also finally provides a curriculum that gives N.C. students vital access to age-appropriate, science-based information critical to their health, safety and well-being," which is "the kind of information that can help them make smart choices in serious situations."Parents are "often the best people for kids to turn to for advice and information" on sex, but "not all children have parents who can provide it, or are even willing to," and "not all children [who] go to their parents adhere to their advice," the editorial states. It continues, "The schools provide another avenue to get this critical advice and information -- and state lawmakers are right to make it available." According to the Observer, North Carolina has the ninth-highest teenage pregnancy rate in the U.S., and about "20,000 teenagers will get pregnant in North Carolina this year." A "comprehensive, science-based education program can help reduce the number of unintended teen pregnancies" and help reduce the spread of STIs, the editorial says. It concludes, "By reaching agreement on this matter, state lawmakers have given the children of this state vital tools to safeguard their health and welfare. ... Perdue should sign this bill and make it law" (Charlotte Observer, 6/26).
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Doctor Testifies About Botched Prostate Treatment At VA Hospital
Dr. Gary D. Kao testified Monday about botched prostate cancer treatment he gave to patients at a Veterans Affairs hospital run by the University of Pennsylvania. The New York Times reports: "The radiation oncologist whom regulators accuse of mishandling scores of radioactive seed implants at the Philadelphia veterans" hospital told a Congressional panel on Monday that while he "could have done better" with some implants, his patients over all received effective treatment for their prostrate cancer."
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Research Team Finds Key Target Of Aging Regulator

Researchers at The Wistar Institute have defined a key target of an evolutionarily conserved protein that regulates the process of aging. The study, published June 11 in Nature, provides fundamental knowledge about key mechanisms of aging that could point toward new anti-aging strategies and cancer therapies. Scientists have long known that a class of proteins called sirtuins promotes fitness and longevity in most organisms ranging from single-celled yeast to mammals. At the cellular level, sirtuins protect genome integrity, enhance resistance to adverse stresses, and antagonize senescence. However, the underlying molecular mechanisms have remained poorly understood. The team, led by senior author Shelley Berger, Ph.D., Hilary Koprowski Professor at The Wistar Institute, demonstrated for the first time a molecular target for a member of this class, Sir2, in regulation of aging in yeast cells. Sir2 removes an acetyl group attached to a specific site (lysine at position 16 or K16) on histone H4 histones are proteins that package and organize the long strands of DNA within the nucleus and also are central regulators in turning genes on and off. The study reveals that removal of this acetyl group by Sir2 near the chromosome ends the telomeres is important for yeast cells to maintain the ability to replicate. Researchers found that Sir2 levels decline as cells age, and there is a concomitant accumulation of the acetylation mark along with disrupted histone organization at telomeres. Deacetylation of H4K16 by Sir2 and consequent telomere stability play a major role in maintaining long lifespan in yeast. Since sirtuins deacetylate many different proteins, these results clarify a key role of Sir2 protein in control of lifespan. "Some modifications on histones, like this acetylation on histone H4 lysine 16, are persistent and are maintained through generations of cell divisions. This DNA-independent inheritance is called epigenetics," Berger says. "Characteristic epigenetic features have been discovered for various developmental processes in recent years. Understanding epigenetic changes associated with aging is a hugely exciting direction in aging research. It will provide insights and ideas not only for new therapies to regulate cells that have lost control of proliferation, such as "immortal" cells found in cancers, but also for new strategies to maintain health and fitness." "We plan to continue to search for new targets of Sir2 and other aging regulators," says lead author Weiwei Dang, Ph.D., a postdoctoral scientist working with Berger. "We are designing unbiased screens for other aging targets and mechanisms in chromatin. Using yeast as our aging model enables us to do many discovery screens that are impossible with other, more complex organisms. Yet it is remarkable that many of these chromatin mechanisms associated with yeast could turn out to be relevant even for aging human cells." Along with senior author Berger and lead author Dang, other authors include: research assistants Rocco Perry and Jean A. Dorsey, from Wistar; graduate student Kristan K. Steffen, Assistant Professor Matt Kaeberlein, Ph.D., and Assistant Professor Brian K. Kennedy, Ph.D., from the University of Washington, Seattle; Assistant Professor F. Brad Johnson, M.D., Ph.D., from the University of Pennsylvania; and Investigator Ali Shilatifard, Ph.D., from the Stowers Institute. This work was funded by the National Institutes of Health and an AFAR Julie Martin Mid-Career Award in Aging Research. The Wistar Institute is an international leader in biomedical research with special expertise in cancer research and vaccine development. Founded in 1892 as the first independent nonprofit biomedical research institute in the country, Wistar has long held the prestigious Cancer Center designation from the National Cancer Institute. Discoveries at Wistar led to the creation of the rubella vaccine that eradicated the disease in the United States, human rabies vaccines used worldwide, and a rotavirus vaccine approved in 2006. Today, Wistar is home to preeminent research programs studying skin cancer, lung cancer, and brain tumors. Wistar Institute Vaccine Center scientists are creating new vaccines against pandemic influenza, HIV, and other diseases threatening global health. The Institute works actively to transfer its inventions to the commercial sector to ensure that research advances move from the laboratory to the clinic as quickly as possible. Wistar Institute


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