Word: leaded
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Although the results are untested in humans, they do suggest that aging could be slowed by drugs. Exactly how rapamycin works is "still an open question," says Randy Strong, a pharmacology professor at the University of Texas Health Science Center at San Antonio and one of three lead authors of the study. But he and his colleagues were prompted to test the aging effects of rapamycin, which was discovered in Easter Island soil samples about 40 years ago, after noting that the compound appeared to affect cell growth in lab animals in much the same way as calorie-restricted diets...
Although the development once again raises the specter of creating humans in a petri dish or custom-designing egg and sperm cells for reproduction, lead author Karim Nayernia says that was not his team's intention. Rather, the experiment was a proof of concept that stem cells can generate any cell in the body - not only the dozens of tissues that make up the human body but also those egg and sperm cells that may give rise to altogether new bodies. "Other cell types don't generate the next generation," says Nayernia, a professor of stem-cell biology at Newcastle...
...unclear whether IVD sperm may eventually be able to fertilize an egg successfully - the ultimate measure of similarity between IVD sperm and normal sperm. (Nayernia is currently testing whether mouse eggs fertilized with IVD sperm can lead to a healthy animal.) If the researcher can generate human IVD sperm that look like normally developed sperm and can get the artificially created germ cells to fertilize an egg, then he can allow the resulting embryo to develop for 14 days - according to U.K. law, embryos created for research purposes must be destroyed at that point. "We would need to study that...
...Obama Administration. Since the coup, the White House has had to walk a fine line between cultivating a new, less interventionist image for the U.S. - which has too often aided military coups in Latin America - and "responding to the hemisphere's desire that it take a strong lead in defending democratic norms," says Vicki Gass, senior associate for rights and development at the independent Washington Office on Latin America. "There will have to be a negotiated settlement to this crisis, and while Latin America appreciates the U.S.'s new style of engagement, it's also still wary of Uncle...
...lead the G8? Where is your credibility?” the former lead singer of the Boomtown Rats asked Berlusconi in a face-to-face exchange published in Sunday’s edition of Italian newspaper La Stampa (the issue was co-edited by Geldof). Like a chastised school boy, Berlusconi clenched his fists and apologized, promising to do better next time...