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Scientific American - Objets Actus

News: Genes May Be Key to Lung Cancer Care
Samedi 02 Juin 2007 - 11:00 - 1 année, 6 mois depuis - Cancer - Scientific American
Researchers have found that Japanese lung cancer patients in general respond better than American sufferers to chemotherapy but they also tend to experience more debilitating side effects from the treatment.

News: Chemotherapy Thwarted by Cancer-Killing Gene
Mardi 15 Mai 2007 - 18:00 - 1 année, 6 mois depuis - Cancer - Scientific American
A study of ovarian cancer patients undergoing chemotherapy determined that individuals with a mutant, nonfunctional version of the tumor-suppressing gene p53 had a survival rate more than twice as high as counterparts with a properly functioning gene. This, despite the fact that the gene in question is, under normal circumstances, essential for preventing cancer in the first place.

Scientific American Magazine: Chromosomal Chaos and Cancer
Samedi 14 Avril 2007 - 22:00 - 1 année, 7 mois depuis - Cancer - Scientific American
When I first began to study cancer as a young postdoctoral fellow in the early 1960s, it looked to leading scientists as though viruses could be the cause of most, if not all, malignancies. That idea was based on the discovery of several tumor- and leukemia-producing viruses that could infect a host cell and insert their own genetic material into its genome, sparking a cancerous transformation and proliferation of the cell. I was optimistic and naive enough to hope that if researchers could understand the exact molecular mechanisms by which such viruses caused cancer, we could develop vaccines to eliminate one of humanity's most dreaded diseases.

News: Thwarting Terror: Genes Can Tell the Story of Radiation Exposure
Mardi 03 Avril 2007 - 16:30 - 1 année, 8 mois depuis - Cancer - Scientific American
A new method for detecting exposure to ionizing radiation could quickly reveal those most at risk in the event of a "dirty bombing" or nuclear incident, say researchers at the Duke University Medical Center in Durham, N.C.

In Focus: Special Report: The Poisoning of Our Pets
Mercredi 28 Mars 2007 - 15:30 - 1 année, 8 mois depuis - Cancer - Scientific American
Early this month, Jim Valentine found himself faced with a heart-wrenching decision: the 35-year-old, unemployed computer consultant from Lansing, Mich., had to decide whether to shell out thousands of dollars he didn't have to try to save his beloved dying cat, Silvus. His nine-year-old, silver-furred friend was suffering from kidney failure and he likely needed a pricey kidney transplant. Instead, Silvus was put to death on March 3.

News: A Protein Twofer That Triggers Tanning and Protects against Skin Cancer
Vendredi 09 Mars 2007 - 10:30 - 1 année, 8 mois depuis - Cancer - Scientific American
A powerful protein known as p53 has long been considered the master regulator of the genome because of its amazing ability to repair damaged DNA. Now scientists at Harvard's Dana-Farber Cancer Institute have discovered that p53 not only mends genetic material but also kicks off the chemical cascade that results in tanning.

Scientific American Magazine: Mapping the Cancer Genome
Samedi 17 Février 2007 - 22:00 - 1 année, 9 mois depuis - Cancer - Scientific American
"If we wish to learn more about cancer, we must now concentrate on the cellular genome." Nobel laureate Renato Dulbecco penned those words more than 20 years ago in one of the earliest public calls for what would become the Human Genome Project. "We are at a turning point," Dulbecco, a pioneering cancer researcher, declared in 1986 in the journal Science. Discoveries in preceding years had made clear that much of the deranged behavior of cancer cells stemmed from damage to their genes and alterations in their functioning. "We have two options," he wrote. "Either try to discover the genes important in malignancy by a piecemeal approach, or & sequence the whole genome."

News: Retroviruses Cross Little Bridges to Infect New Cells
Lundi 12 Février 2007 - 10:00 - 1 année, 9 mois depuis - Cancer - Scientific American
Researchers at Yale University's School of Medicine have discovered a novel mechanism by which viruses infect neighboring cells. Their discovery, appearing in this week's Nature Cell Biology could lead to new antiviral therapies.

News: The Incredible, Medical Egg
Mardi 16 Janvier 2007 - 16:00 - 1 année, 10 mois depuis - Cancer - Scientific American
The chicken egg has a storied history in medicine. Even today, millions of ordinary fertilized eggs are each punctured with a drill and injected with flu virus to make vaccines. Now, scientists at the same research institute that cloned Dolly the sheep have produced a genetically modified rooster whose female descendants lay eggs that produce medicines in place of a protein in egg whites.

Scientific American Magazine: Spice Healer
Samedi 13 Janvier 2007 - 22:00 - 1 année, 10 mois depuis - Cancer - Scientific American
Searching for new drugs by milling through ancient folk pharmacopoeia or by just picking a plant while walking in the woods has a decidedly checkered history. Many well-established therapeutic compounds originated in trees, shrubs, mollusks, even dirt. Aspirin came from willow bark, cholesterol-lowering statins from a mold, and the antimalarial artemisinin from a shrub used in traditional Chinese medicine. Yet after raising $90 million during the 1990s in a much publicized bid to tap indigenous knowledge for new drug leads, Shaman Pharmaceuticals had to lower its sights until it was doing nothing more than selling its products as nutritional supplements before finally shutting its doors for good a few years ago.

Actus fournies par : Scientific American

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