temporin has been researched along with Sepsis* in 2 studies
2 other study(ies) available for temporin and Sepsis
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Conjugate of Enkephalin and Temporin Peptides as a Novel Therapeutic Agent for Sepsis.
Antimicrobial peptides (AMPs) exhibit a wide spectrum of actions, ranging from a direct bactericidal effect to multifunctional activities as immune effector molecules. The aim of this study was to examine the anti-inflammatory properties of a DAL-PEG-DK5 conjugate composed of a lysine-rich derivative of amphibian temporin-1CEb (DK5) and dalargin (DAL), the synthetic Leu-enkephalin analogue. Detailed study of the endotoxin-neutralizing activity of the peptide revealed that DAL-PEG-DK5 interacts with LPS and the LPS binding protein (LBP). Moreover, DAL-PEG-DK5 prevented dimerization of TLR4 at the macrophage surface upon LPS stimulation. This inhibited activation of the NF-κB signaling pathway and markedly reduced pro-inflammatory cytokine production. Finally, we showed that aggregation of DAL-PEG-DK5 into amyloid-like structures induced by LPS neutralized the endotoxin proinflammatory activity. Consequently, DAL-PEG-DK5 reduced morbidity and mortality in vivo, in a mouse model of endotoxin-induced septic shock. Collectively, the data suggest that DAL-PEG-DK5 is a promising therapeutic compound for sepsis. Topics: Animals; Antimicrobial Cationic Peptides; Cell Membrane; Dimerization; Enkephalins; Humans; Lipopolysaccharides; Macrophage Activation; Mice; Mice, Inbred C57BL; Peptides; Proteins; RAW 264.7 Cells; Sepsis; Signal Transduction; Toll-Like Receptor 4 | 2018 |
Temporin A alone and in combination with imipenem reduces lethality in a mouse model of staphylococcal sepsis.
Morbidity and mortality from staphylococcal toxic shock remain high, despite the availability of antibiotics to which the microorganism is sensitive.. In in vitro experiments, the ability of temporin A to inhibit lipoteichoic acid-induced production of tumor necrosis factor (TNF)- alpha and nitric oxide (NO) was determined. Also, mouse models of staphylococcal sepsis were used to evaluate the efficacy of temporin A alone and in combination with imipenem. BALB/c mice were injected intravenously with live Staphylococcus aureus or heat-killed cells and then received either isotonic sodium chloride solution, 2 mg/kg temporin A, 7 mg/kg imipenem, or 2 mg/kg temporin A in combination with 7 mg/kg imipenem immediately and 6 h after challenge. The main outcome measures were lethality rates, plasma bacterial counts, and plasma TNF- alpha and interleukin (IL)-6 levels.. The in vitro experiments showed that temporin A did not cause TNF- alpha or NO release. In the in vivo experiments with live bacteria, both compounds reduced lethality rates and bacterial growth. Imipenem exhibited the highest efficacy. The combination-treated group had significantly lower bacterial counts than did the singly-treated groups and the lowest lethality rates. In the experiments with heat-killed cells, only temporin A demonstrated significant efficacy with respect to lethality and reduction of plasma TNF- alpha and IL-6 levels.. This study shows that temporin A can reduce the stimulatory effects of bacterial cell components and suggests that it may be beneficial in the treatment of severe staphylococcal sepsis. Topics: Animals; Anti-Bacterial Agents; Antimicrobial Cationic Peptides; Disease Models, Animal; Drug Evaluation, Preclinical; Drug Therapy, Combination; Imipenem; Male; Mice; Mice, Inbred BALB C; Proteins; Sepsis; Staphylococcal Infections; Staphylococcus aureus; Treatment Outcome | 2005 |