OR.72. Impact of Bacterial Colonization in Normal Human Livers on Activation of Toll-like Receptor 4 and Nuclear Factor kappa B and Their Possible Role in Maintaining Homeostasis

2008 ◽  
Vol 127 ◽  
pp. S30-S31
Author(s):  
Rashmi Singh ◽  
Jay Bullard ◽  
Krystal Vonfeldt ◽  
Senait Assefa ◽  
Mamta Kalra ◽  
...  
Keyword(s):  
Nuclear Factor Kappa B ◽  
Bacterial Colonization ◽  
Nuclear Factor ◽  
Toll Like Receptor ◽  
Toll Like Receptor 4 ◽  
Nuclear Factor Kappa ◽  
Normal Human ◽  
Human Livers

Juglone Attenuates Sepsis-Induced Acute Lung Injury via Suppression of the TLR4/Nf-κb Pathway

2020 ◽  
Vol 18 (2) ◽  
pp. 201-206
Author(s):  
Qiu Nan ◽  
Xu Xinmei ◽  
He Yingying ◽  
Fan Chengfen
Keyword(s):  
Acute Lung Injury ◽  
Lung Injury ◽  
Nuclear Factor Kappa B ◽  
Cecal Ligation ◽  
Myeloperoxidase Activity ◽  
Nuclear Factor ◽  
Cecal Ligation And Puncture ◽  
Toll Like Receptor ◽  
Toll Like Receptor 4 ◽  
Nuclear Factor Kappa

Sepsis, with high mortality, induces deleterious organ dysfunction and acute lung injury. Natural compounds show protective effect against sepsis-induced acute lung injury. Juglone, a natural naphthoquinone, demonstrates pharmacological actions as a pro-apoptotic substrate in tumor treatment and anti-inflammation substrate in organ injury. In this study, the influence of juglone on sepsis-induced acute lung injury was investigated. First, a septic mice model was established via cecal ligation and puncture, and then verified via histopathological analysis of lung tissues, the wet/dry mass ratio and myeloperoxidase activity was determined. Cecal ligation and puncture could induce acute lung injury in septic mice, as demonstrated by alveolar damage and increase of wet/dry mass ratio and myeloperoxidase activity. However, intragastric administration juglone attenuated cecal ligation and puncture-induced acute lung injury. Secondly, cecal ligation and puncture-induced increase of inflammatory cells in bronchoalveolar lavage fluid was also alleviated by the administration of juglone. Similarly, the protective effect of juglone against cecal ligation and puncture-induced acute lung injury was accompanied by a reduction of pro-inflammatory factor secretion in bronchoalveolar lavage fluid and lung tissues. Cecal ligation and puncture could activate toll-like receptor 4/nuclear factor-kappa B signaling pathway, and administration of juglone suppressed toll-like receptor 4/nuclear factor-kappa B activation. In conclusion, juglone attenuated cecal ligation and puncture-induced lung damage and inflammatory response through inactivation of toll-like receptor 4/nuclear factor-kappa B, suggesting a potential therapeutic strategy in the treatment of sepsis-induced acute lung injury.

scholarly journals Scutellarin Attenuates Hypertension-Induced Expression of Brain Toll-Like Receptor 4/Nuclear Factor Kappa B

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Xingyong Chen ◽  
Xiaogeng Shi ◽  
Xu Zhang ◽  
Huixin Lei ◽  
Simei Long ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Nuclear Factor Kappa B ◽  
Interleukin 1 ◽  
Low Grade ◽  
Nuclear Factor ◽  
Toll Like Receptor ◽  
Hypertensive Rats ◽  
Toll Like Receptor 4 ◽  
Nuclear Factor Kappa ◽  
Proinflammatory Mediators

Hypertension is associated with low-grade inflammation, and Toll-like receptor 4 (TLR4) has been shown to be linked to the development and maintenance of hypertension. This study aimed to investigate the effects of scutellarin (administered by oral gavage daily for 2 weeks) on brain TLR4/nuclear factor kappa B-(NF-κB-) mediated inflammation and blood pressure in renovascular hypertensive (using the 2-kidney, 2-clip method) rats. Immunofluorescence and western immunoblot analyses revealed that hypertension contributed to the activation of TLR4 and NF-κB, accompanied by significantly enhanced expression of proinflammatory mediators, such as tumor necrosis factor-α(TNF-α), interleukin-1β(IL-1β), and interleukin-18 (IL-18). Furthermore, expression of the antiapoptotic protein, myeloid cell leukemia-1 (Mcl1), was decreased, and the pro-apoptotic proteins, Bax and cleavedcaspase-3 p17 were increased in combined cerebral cortical/striatal soluble lysates. Scutellarin significantly lowered blood pressure and attenuated the number of activated microglia and macrophages in brains of hypertensive rats. Furthermore, scutellarin significantly reduced the expression of TLR4, NF-κB p65, TNF-α, IL-1β, IL-18, Bax and cleaved-caspase-3 p17, and increased the expression of Mcl1. Overall, these results revealed that scutellarin exhibits anti-inflammatory and anti-apoptotic properties and decreases blood pressure in hypertensive rats. Therefore, scutellarin may be a potential therapeutic agent in hypertension-associated diseases.

Asiaticoside Regulates Toll-Like Receptor 4/Nuclear Factor-Kappa B Signaling Pathway to Relieve Lipopolysccharide-Induced Inflammation and Apoptosis in ATDC5 Cells

2021 ◽  
Vol 19 (4) ◽  
pp. 432-437
Author(s):  
Lin Gao ◽  
Ming Yang ◽  
San Cai ◽  
Liping Gao ◽  
Chunfeng Gui ◽  
...  
Keyword(s):  
Signaling Pathway ◽  
Nuclear Factor Kappa B ◽  
Centella Asiatica ◽  
Joint Disease ◽  
Therapeutic Drug ◽  
Nuclear Factor ◽  
Toll Like Receptor ◽  
Toll Like Receptor 4 ◽  
Nuclear Factor Kappa ◽  
Bioactive Component

Osteoarthritis is a progressive joint disease characterized by degeneration and destruction of articular cartilage. The incidence of osteoarthritis has increased steadily over the years leading to more than 50% in people over the age of 65. Due to associated side effects of prevailing therapeutics, better drugs are needed for osteoarthritis management. Asiaticoside is a bioactive component isolated from the medicinal plant Centella asiatica. It has been reported to possess neuroprotective, antiulcer, wound healing, anti-inflammatory, antioxidative, and other pharmacological properties. However, the potential of asiaticoside in the management of osteoarthritis remains to be explored. To this end, we examined the effect of asiaticoside on lipopolysaccharides induced inflammatory injury and apoptosis of chondrocytes. The results show that asiaticoside promotes viability and decrease in apoptosis of ATDC5 cells through decreased production of proinflammatory cytokines and the regulation of toll-like receptor 4/nuclear factor-kappa b signaling pathway. In summary, our results provide the evidence that asiaticoside could serve as a promising therapeutic drug for osteoarthritis treatment.

Sign in / Sign up

Export Citation Format

Share Document