Word: bloodstreams
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...1970s when he had his epiphany: if you could engineer DNA on a molecular level, why not build machines out of atoms, program them to build more machines and so on, until you had millions of infinitesimal nanobots, endlessly restocking the food supply, say, or swarming through the bloodstream eradicating disease, or building skyscrapers from industrial waste? If nanotech was viable, it promised a gleaming future of virtually limitless wealth and endlessly renewable resources...
...hopes of housing a baby, and a pair of spigots on the chest at which Baby eventually may dine. The surprising thing is that women are the more communistic sex, right down to the cellular level. Fetal cells derived from a woman's offspring may survive in her bloodstream decades after childbirth. What's more, the fabled liabilities of the female condition are sometimes revealed as strengths. Researchers have found that PMS--which has become a handy three-letter slur directed at the aggressive, or merely irritated, woman--is experienced by many as a state of "heightened activity, intellectual clarity...
...enable you to treat disease successfully." That is precisely what Anderson and his colleagues did eight years ago in the first approved use of gene therapy, when they removed blood cells from a young patient, genetically altered them with a viral vector and infused them back into her bloodstream...
...when she was two years old, Ashi began taking PEG-ADA, a newly developed drug that consists of the missing enzyme protected by a chemical sheath that enables it to function in the bloodstream for days. While the drug requires weekly injections for life at an annual cost of more than $60,000, it has enabled most of the handful of ADA-deficient children to survive. However, it provided only marginal help for Ashi, and she began to fail...
Over the next two years this procedure was repeated a dozen or so times on the little patients. For Ashi it went on until the level of ADA in her bloodstream was 25% of normal, more than enough to protect her. As a precaution mandated by the FDA, she continued to receive weekly doses of PEG-ADA during her gene treatments...