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Curse of the living dead

Curse of the living dead

作者:官鲔  时间:2019-03-07 05:06:08  人气:

By Phil Cohen in Seattle CELLS that refuse to die could be the undoing of the immune system as we age. Immune T cells that carry proteins called CD4 and CD28 on their surface play a crucial role in rallying immunity to an invading pathogen. But during normal ageing, and in certain inflammatory diseases such as rheumatoid arthritis, half the circulating T cells that carry CD4 can lose their CD28. These cells seem to be less effective at boosting immunity and also develop dangerous tendencies,