Word: cellularized
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...Internet access device, the Treo works well enough, given the current slow data transmission speeds of Asian cellular networks. The monochrome screen isn't vivid, but Treo's display will improve when a color screen version becomes available in late summer. Where the device really shines is as a phone. All the normal functions such as caller ID and the ability to automatically capture incoming numbers are there. The Treo also solves a common mobile phone irritant. You can look up a number during a call, a function absent from conventional mobiles. Dialing is a snap. Just type...
...SCAN A lot of patients are taking it upon themselves to order their own positron emission tomography scan. This extremely powerful test screens your body's function rather than its structure; by visualizing cellular activity, it shows abnormal processes, such as those associated with cancers and metabolic dysfunction. The PET can spot tumors and other problems that may not be detectable with traditional MRI or CT scans. It also gives information about heart disease and many neurological disorders like Alzheimer's. Cost...
Logically it would seem that compounds that block the activity of either beta or gamma secretase should slow the progression of Alzheimer's disease. But there are reasons to remain cautious. For one thing, it may turn out that both these secretases play vital roles in other aspects of cellular metabolism, so that interfering with them will come at the price of serious side effects. For another, it is still far from proven that beta amyloid is as central to Alzheimer's disease as, say, cholesterol is to heart disease. Says molecular neurologist Dr. Peter St. George-Hyslop...
...those checks is the T cell's dependence on another cellular player: the antigen-presenting cell. The APC is an omnivorous creature whose job, among other things, is to gobble up microbial invaders. To initiate the immune response, the APC coughs up a molecule from the bug it has eaten, latches on to a helper T cell and "presents" it with a target molecule, instructing the T cell to prepare its troops for war. This activation is tightly controlled; it cannot occur without the lockstep interaction of several proteins on both cells--one of which is known...
...result of chronic high blood pressure, high cholesterol or the deleterious effects of smoking. The body tries to repair the damage, and a kind of internal scab is formed. Years go by, and the scab develops into a fatty deposit, filled with cholesterol, proteins and bits of cellular detritus. Sometimes the plaque is quite stable, and nothing much happens. Other times, for reasons that are still unclear, it becomes inflamed and prone to rupture. If the plaque breaks open, a clot forms, choking off the supply of blood. If the interruption lasts long enough, a heart attack ensues...