ABSTRACT
Objective To investigate the effects of different anti thrombotic strategies on the risk of bleeding, cardiac events and quality of life in elderly patients with acute non ST segment elevation myocardial infarction.MethodsElderly patients with acute non ST elevation myocardial infarction 200 cases of complication in patients with atrial fibrillation, are in our hospital from May 2013 to December 2015 were cardiovascular department, after discharge according to different antithrombotic strategy, according to the 5 groups, including 40 cases of A group, 75mg/d+ 100mg/d treatment with clopidogrel and aspirin;B group 40 cases.Using warfarin therapy;40 cases in group C, 75mg/d or 100mg/d+ with clopidogrel aspirin warfarin therapy;40 cases in group D, using 75mg/d+ 100mg/d+clopidogrel aspirin warfarin therapy, group E received 75mg/d+ clopidogrel aspirin 100mg/d plus warfarin therapy, based on the use of psychological intervention.The risk of bleeding, cardiac events and quality of life scores were compared.ResultsStatistical analysis showed that the incidence of major cardiac events in E group (2.5%) and the quality of life were optimal (the data are statistically significant compared to P<0.05, A, B);C, D, E groups, the risk of major bleeding rate compared with no significant difference.ConclusionThe application of drugs and psychological intervention in the treatment of elderly patients with acute non ST segment elevation myocardial infarction patients can be more effective.
ABSTRACT
Substance P (SP) is well known for its immunoregulatory influence on NK cells. The biological actions of SP are mediated primarily through the high-affinity neurokinin-1 receptor (NK-1R), a G protein-coupled receptor (GPCR). Receptor binding triggers a cAMP signaling pathway and intracellular levels of cAMP are regulated via Gαs and Gαi. In this study NF449, a Gαs-selective G protein antagonist, was used to study the role of Gαs in the activation of NK92-MI cells by SP. Results show that 10(-12)M SP enhances the expression of Gαs and Gαi3 in NK92-MI cells promoting a cytotoxic phenotype characterized by expression of perforin and granzyme B. Development of a cytotoxic phenotype in NK92-MI cells stimulated with SP is blunted by inhibition of Gαs by NF449. In summary, SP signaling through NK-1R promotes a cytotoxic phenotype in NK92-MI cells characterized by upregulation of both Gαs and Gαi3. NF449 inhibits Gαs, blunts SP-induced expression of perforin and granzyme B, and represents a potential therapeutic avenue for reducing NK-cell mediated cytotoxicity.
Subject(s)
GTP-Binding Protein alpha Subunits, Gs/metabolism , Killer Cells, Natural/metabolism , Substance P/pharmacology , Cells, Cultured , GTP-Binding Proteins/antagonists & inhibitors , Granzymes/metabolism , Humans , K562 Cells , Killer Cells, Natural/drug effects , Perforin/metabolismABSTRACT
Substance P (SP) has been well known by its immunoregulatory properties on the functions of NK cells. However, the changes of molecules involved in the signaling pathways and effects of these molecules of NK92-MI cells activated by SP remain unclear. In this study, we explored the global changes in cellular protein expression of NK92-MI cells activated by SP by 2D-PAGE analysis. Subsequently, we demonstrated that 40 protein spots showed more than 2-fold changes, which displayed marked alterations with statistic significance (p<0.05) between the testing group and control group. Compared with the control we also found that 16 proteins were up-regulated and 24 proteins were down-regulated among the 40 differentially expressed protein spots in the NK92-MI cells activated by SP. In addition 21 differentially expressed proteins were identified by MS/MS, suggesting that those proteins may play important roles in the process of activation of NK92-MI cells by SP. Moreover, the protein Rho GDI-2, Protein DJ-1 and alpha-enolase were reconfirmed by western blotting. Taken together, these findings may provide a new insight into better understanding at the molecular mechanisms of activation of NK92-MI cells by SP.
