ABSTRACT
Objective To analyze the clinical characteristics of pulmonary infection in patients with multiple myeloma for improving early prevention,diagnosis and treatment.Methods A retrospective analysis was conducted for 70 patients with multiple myeloma admitted to our hospital from January 2012 to April 2015.The clinical data of pulmonary infection were reviewed and analyzed in terms of radiological findings,pathogen distribution,and related risk factors.Results The peripheral white blood cell count and neutrophil percentage could be normal in pulmonary infection of patients with multiple myeloma.However,erythrocyte sedimentation rate increased significantly.Radiological study revealed that infection of bilateral lungs was common.The most frequently identified pathogens were gram negative bacteria,especially Pseudomonas aeruginosa.The main predisposing factors of pulmonary infection were agranulocytosis,stage Ⅲ multiple myeloma,and complications.Conclusions The clinical symptoms of pulmonary infection are diverse in patients with multiple myeloma.Poor immunity is the primary predisposing factor.The common pathogens are gram-negative bacteria.Beta-lactam/beta-lactamase inhibitor combinations or fluoroquinolones are effective empiric treatment for controlling the progression of pulmonary infection.
ABSTRACT
Objective To discuss the mechanism of inhibition of platelet activation by tanshinone type ⅡA(TanⅡA) through G protein signal pathway.Methods Methylthiazolyldiphenyl-tetrazolium bromide(MTT) test was used to determine the optimum effective concentration and optimal time of thrombin and TanⅡA on platelet.Northern blot and Western blot were used to detect the transcription and expression levels of G protein and related signal molecules,including protease activated receptors(PARs),P2Y1 and P2Y12 receptors,α2A-adrenergic receptor and thromboxane A2(TXA2) receptor,in control group,thrombin treated group and TanⅡA treated group,and the platelet aggregation rate was also detected.Results Platelet aggregation rate,and the transcription and expression levels of G protein and related molecules in thrombin treated group were higher than control group(P<0.05).The transcription and expression levels of G protein and related molecules in different concentrations of TanⅡA treated groups were lower than thrombin treated group(P<0.05).Conclusion TanⅡA could inhibit the activation of platelet by inhibiting the transcription and expression of G protein and the related molecules.
