A new acetylcholinesterase inhibitor with anti-PAF activity modulates oxidative stress and pro-inflammatory mediators release in stimulated RAW 264.7 macrophage cells. Comparison with tacrine

2007 ◽  
Vol 7 (13) ◽  
pp. 1685-1694 ◽  
Author(s):  
M.J.M. Ezoulin ◽  
Z. Liu ◽  
H. Dutertre-Catella ◽  
G. Wu ◽  
C.Z. Dong ◽  
...  
2013 ◽  
Vol 36 (2) ◽  
pp. 256-264 ◽  
Author(s):  
Matharage Gayani Dilshara ◽  
Rajapaksha Gedara Prasad Tharanga Jayasooriya ◽  
Chang-Hee Kang ◽  
Seungheon Lee ◽  
Sang Rul Park ◽  
...  

2021 ◽  
Vol 8 (03) ◽  
pp. e122-e130
Author(s):  
Jean Paul Dzoyem ◽  
Nathalie Boulens ◽  
Eric Allémann ◽  
Florence Delie

AbstractThis study aimed at preparing and characterizing thymol, eugenol, and piperine-loaded poly(D,L-lactic-co-glycolic acid) nanoparticles and evaluating the effect on inflammatory mediators secretion and apoptosis in Raw 264.7 macrophage cells. Nanoparticles were produced by the solvent evaporation technique. Dynamic light scattering and scanning electron microscopy were used to study the physicochemical characteristics. Raw 264.7 macrophage cells were used as a model for in vitro assays. The 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-(2,4-disulfophenyl)-2H-tetrazolium assay was used to determine the cytotoxicity of the formulated nanoparticles. An annexin V apoptosis detection kit was used to assess apoptosis. Nitric oxide production was determined using the Griess reagent, and the inflammatory mediators level was evaluated with Th1/Th2 cytokine and fluorometric cyclooxygenase kits. The loaded nanoparticles showed a particle size around 190 nm with a low polydispersity between 0.069 and 0.104 and a zeta potential between–1.2 and–9.5 mV. Reduced cytotoxicity of nanoparticles compared to free molecules against Raw 264.7 macrophage cells was observed and seemed to occur through a mechanism associated with apoptosis. A decrease in cyclooxygenase enzyme activity with an increasing concentration was observed. Both free molecules and nanoparticles showed their capacity to modulate the inflammatory process mostly by inhibiting the investigated inflammatory cytokines. The data presented in this study indicate that thymol and piperine-loaded poly(D,L-lactic-co-glycolic acid nanoparticles could serve as a novel anti-inflammatory colloidal drug delivery system with reduced toxicity. However, further study should be considered to optimize the formulation’s loading capacity and thereby probably enhance their bioactivity in treating inflammatory diseases.


2019 ◽  
Vol 47 (07) ◽  
pp. 1589-1609 ◽  
Author(s):  
Gareeballah Osman Adam ◽  
Gi-Beum Kim ◽  
Sei-Jin Lee ◽  
Heeryung Lee ◽  
Hyung-Sub Kang ◽  
...  

Lipopolysaccharides (LPS) cause systemic inflammatory responses, which are characterized by high mortality and multiple signs, including metabolic disturbances, respiratory acidosis, hypotension, and vital organs disorder. Cytokines secretion and oxidative stress are the main features of the disease. Diagnosis and treatment of systemic inflammation (SI) remain a challenge. Korean Red Ginseng (RG) is one of medicinal herbs that showed a potent anti-oxidant effect. We aimed to study the protective effects of RG on systemic inflammatory response in rats and RAW 264.7 macrophage cells induced by LPS. The rats were treated with water and alcohol extracts of RG for four weeks to prevent the inflammatory response. The result showed that LPS toxin increased morbidity and mortality, and induced liver, kidney, and lung injuries manifested by deteriorated biomarkers. Hypotension, hypomagnesemia, acidosis, and oxidative stress were observed in septic rats. However, RG extracts attenuated liver, kidney, and lung enzymes and metabolites in treated groups via its anti-inflammatory and anti-oxidant properties. Furthermore, RG improved magnesium and blood pressure in the treated groups. RAW 264.7 macrophage cells exposed to LPS disturbance in translocation of p65 and MAPK/p38. Nevertheless, RG-pretreated cells did not significantly alter. In conclusion, RG reduced the rates of mortality and morbidity of treated rats — liver, kidney, and lung injuries were protected in the treated groups through the potentiation of anti-oxidant defense. RG was able to conserve mitochondrial function, inhibiting the activation of MAPK/p38 signaling and suppressing NF-[Formula: see text]B p65 cytoplasm-nucleus transport. Further studies are needed to examine the effects on chronic conditions in animal models and human.


Planta Medica ◽  
2009 ◽  
Vol 76 (03) ◽  
pp. 251-257 ◽  
Author(s):  
Jong-Heon Won ◽  
Ji-Sun Shin ◽  
Hee-Juhn Park ◽  
Hyun-Ju Jung ◽  
Duck-Jae Koh ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document