Deoxyribozymes (DNA enzymes; DNAzymes) are catalytic DNA sequences. Using the technique of in vitro selection, individual deoxyribozymes have been identified that catalyze RNA cleavage, RNA ligation, and a growing range of other chemical reactions. DNA enzymes have been used in vitro for applications such as biochemical RNA manipulation and analytical assays for metal ions, small organic compounds, oligonucleotides, and proteins. Deoxyribozymes have also been utilized as in vivo therapeutic agents to destroy specific mRNA targets. Although many conceptual and practical challenges remain to be addressed, deoxyribozymes have substantial promise to contribute meaningfully for applications both in vitro and in vivo.

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Deoxyribozymes: useful DNA catalysts in vitro and in vivo.

Neutrophil extracellular traps (NETs) have recently been discovered as a central part of antimicrobial innate immunity. In the meanwhile, evidence accumulated that NETs are also generated upon non-infectious stimuli in various clinical settings. In acute or chronic inflammatory disorders aberrantly enhanced NET formation and/or decreased NET degradation seems to correlate with disease outcome. This review summarizes current knowledge about the relation of NETs in a broad spectrum of clinical settings. Specifically, we focus on the importance of NETs as a predictive marker in severely ill patients and further, we speculate about the potential pathophysiology of NETs.

The clinical value of neutrophil extracellular traps

Introduction: Ongoing studies on the inhibition of gene expression at the mRNA level have identified several types of specific inhibitors such as antisense oligonucleotides, small interfering RNA, ribozymes and DNAzymes (Dz) After its discovery in 1997, the 10-23 Dz (which can cleave RNA efficiently and site-specifically, has flexible design, is independent from cell mechanisms, does not require expensive chemical modifications for effective use in vivo) has been employed to downregulate a range of therapeutically important genes Recently, 10-23 Dzs have taken their first steps into clinical trialsAreas covered: This review focuses predominantly on Dz applications as potential antiviral, antibacterial, anti-cancer and anti-inflammatory agents as well as for the treatment of cardiovascular disease and diseases of CNS, summarizing results of their clinical trials up to the present dayExpert opinion: In comparison with antisense oligonucleotides and small interfering RNAs, Dzs do not usually show off-tar

DNA enzymes as potential therapeutics: towards clinical application of 10-23 DNAzymes.

Gold nanozyme: Biosensing and therapeutic activities.

Drug candidates and model systems in respiratory syncytial virus antiviral drug discovery

Inhibition of respiratory syncytial virus of subgroups A and B using deoxyribozyme DZ1133 in mice.

Respiratory syncytial virus (RSV) infection is ubiquitous and leads to various outcomes between immunocompetent and immunocompromised individuals. This study aimed to compare RSV infection and inflammatory responses between immunocompetent BALB/c mice and immunodeficient nude mice. RSV titers in both infected BALB/c mice and nude mice peaked on the third day post-inoculation, but the nude mice had longer lasting and higher levels of viral replication. RSV infection induced a more severe grade of pulmonary histopathology and larger numbers of leukocytes in airways of nude mice than that of BALB/c mice. RSV infection increased pulmonary macrophages and natural killer (NK) cells in both strains of mice. Furthermore, infected nude mice had larger numbers of pulmonary macrophages and NK cells than infected BALB/c mice. Whereas the RSV infected BALB/c mice secreted more tumor necrosis factor –α (TNF-α), interleukin-12 (IL-12), interferon-γ (IFN-γ) and IL-10 than control BALB/c mice, the infected nude mice had higher levels of TNF-α, IL-12 and IL-10 than the infected BALB/c mice. The inflammation induced by RSV infection did not correspond with the immune response of T cells. Macrophages and NK cells were potent immunocytes and inflammatory cells in RSV infection especially when T lymphocytes were deficient. Therefore, nude mice may be a good model for severe and persistent RSV infection in immunocompromised hosts.

Increased pathogenesis and inflammation of airways from respiratory syncytial virus infection in T cell deficient nude mice

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Inhibition of respiratory syncytial virus of subgroups A and B using deoxyribozyme DZ1133 in mice.

Increased pathogenesis and inflammation of airways from respiratory syncytial virus infection in T cell deficient nude mice