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目的 To compare the efficacy of inhaled budesonide and systemic methylprednisolone on systemic inflammation of AECOPD.方法 30 AECOPD patients were randomly divided into two group.Budesonide group(15 cases)were treated with inhaledbudesonide(3 mg Bid); methylprednisolone group(15 cases)were treated with systemic methylprednisolone(methylprednisolone acetate injectable suspension 40mg Qd for three days and then methylprednisolone tablets 8mgBid).Observe symptoms,lung function,blood gas analysis and adverse effects of the patients in two groups.Peripheral bloodsamples were collected before and after treatment for 1 day,4 days and 7 days.Interleukin-8(IL-8)and TNF-α levels weredetermined by an enzyme linked immunosorbent assay(ELISA).Hs-CRP levels were detected by automatic biochemical analyzer.Western blotting was used to determine histone deacetylase 2(HDAC2)protein expression.