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TLR4 KIDNEY

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https://www.readbyqxmd.com/read/28485782/nac-attenuates-adriamycin-induced-nephrotic-syndrome-in-rats-through-regulating-tlr4-signaling-pathway
#1
H Yao, Z-Y Cai, Z-X Sheng
OBJECTIVE: Nephrotic syndrome (NS) is a detrimental renal disease that affects a large population. It is suggested that Toll-like Receptor 4 (TLR4) signaling pathway plays an important role in NS. The aim of this study was to evaluate the immunosuppressive effect of N-acetylcysteine (NAC) in the treatment of NS elucidate its interaction with TLR4 pathway in a rat model. MATERIALS AND METHODS: Rat NS model was constructed using the Bertain method by injecting adriamycin (4...
April 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28485325/lipopolysaccharide-stimulates-surfactant-protein-a-in-human-renal-epithelial-hk-2-cells-through-upregulating-toll-like-receptor-4-dependent-mek1-2-erk1-2-nf-%C3%AE%C2%BAb-pathway
#2
Jiao Liu, Guang Li, Wen-Jie Xie, Lu Wang, Rui Zhang, Ke-Sheng Huang, Qing-Shan Zhou, De-Chang Chen
BACKGROUND: Surfactant protein-A (SP-A) contributes to the regulation of sepsis-induced acute kidney injury. In a previous study, we demonstrated that the expression of SP-A in the human renal tubular epithelial (HK-2) cells can be stimulated by lipopolysaccharide (LPS). The present study evaluated the possible signal-transducing mechanisms of LPS-induced SP-A biosynthesis in the HK-2 cells. METHODS: Tetrazolium salt colorimetry (MTT) assay was used to detect cell viability of HK-2 cells after LPS stimulation on different time points...
May 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28472797/up-regulation-of-hmgb1-exacerbates-renal-ischemia-reperfusion-injury-by-stimulating-inflammatory-and-immune-responses-through-the-tlr4-signaling-pathway-in-mice
#3
Chuan-Bao Chen, Long-Shan Liu, Jian Zhou, Xiao-Ping Wang, Ming Han, Xing-Yuan Jiao, Xiao-Shun He, Xiao-Peng Yuan
BACKGROUND/AIMS: The aim of this study was to elucidate how high-mobility group box 1 (HMGB1) exacerbates renal ischemic-reperfusion injury (IRI) by inflammatory and immune responses through the toll-like receptor 4 (TLR4) signaling pathway. METHODS: A total of 30 wild-type (WT) mice and 30 TLR4 knockout (TLR4-/-) mice were selected and then randomly assigned to the Sham, I/R or HMGB1 groups. The serum and kidney tissues of all mice were collected 24 h after the perfusion...
May 3, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28466227/protective-effects-and-mechanisms-of-shenhua-tablet-on-toll-like-receptors-in-rat-model-of-renal-ischemia-reperfusion-injury
#4
Qing-Ping Li, Ri-Bao Wei, Xi Yang, Xiao-Yong Zheng, Ting-Yu Su, Meng-Jie Huang, Zhong Yin, Xiang-Mei Chen
OBJECTIVES: To investigate the protective effects and potential mechanisms of Shenhua Tablet (, SHT) on the toll-like receptors (TLRs)-mediated signaling pathways in a rat model of kidney ischemia-reperfusion injury (IRI). METHODS: Sixty male Wistar rats were randomly divided into 5 groups: sham surgery, model control, astragaloside (150 mg•kg(-1)•d(-1)), low- and high-dose SHT (1.5 and 3.0 g•kg(-1)•d(-1), repectively) groups. One week after drug treatment, rats underwent surgery to establish the IRI models...
May 3, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28423002/human-sr-bii-mediates-saa-uptake-and-contributes-to-saa-pro-inflammatory-signaling-in-vitro-and-in-vivo
#5
Irina N Baranova, Ana C P Souza, Alexander V Bocharov, Tatyana G Vishnyakova, Xuzhen Hu, Boris L Vaisman, Marcelo J Amar, Zhigang Chen, Alan T Remaley, Amy P Patterson, Peter S T Yuen, Robert A Star, Thomas L Eggerman
Serum amyloid A (SAA) is an acute phase protein with cytokine-like and chemotactic properties, that is markedly up-regulated during various inflammatory conditions. Several receptors, including FPRL-1, TLR2, TLR4, RAGE, class B scavenger receptors, SR-BI and CD36, have been identified as SAA receptors. This study provides new evidence that SR-BII, splice variant of SR-BI, could function as an SAA receptor mediating its uptake and pro-inflammatory signaling. The uptake of Alexa Fluor488 SAA was markedly (~3 fold) increased in hSR-BII-expressing HeLa cells when compared with mock-transfected cells...
2017: PloS One
https://www.readbyqxmd.com/read/28416741/relaxin-abrogates-renal-interstitial-fibrosis-by-regulating-macrophage-polarization-via-inhibition-of-toll-like-receptor-4-signaling
#6
Lei Chen, Ming-Lei Sha, Deng Li, Yi-Ping Zhu, Xing-Jie Wang, Chen-Yi Jiang, Shu-Jie Xia, Yi Shao
Renal fibrosis is a common feature of chronic kidney disease (CKD). To inhibit the CKD process, it is important to prevent renal fibrosis, though CKD remains incurable. Renal fibrosis can be inhibited by relaxin in several experimental models, but the mechanism of relaxin for antifibrotic potential is still not clear. And here we have studied the role of relaxin in macrophage polarization and renal inflammation after unilateral ureteral obstruction (UUO). Our results show that relaxin can downregulate the Toll-like receptor (TLR) 4 signaling, shift macrophage polarization toward the M2 phenotype and ameliorat renal fibrosis in the early stages of UUO...
March 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28346614/crosstalk-between-transforming-growth-factor-beta-2-and-toll-like-receptor-4-in-the-trabecular-meshwork
#7
Humberto Hernandez, Wanda E Medina-Ortiz, Tomi Luan, Abbot F Clark, Colleen M McDowell
Purpose: The trabecular meshwork (TM) is involved in the outflow of aqueous humor and intraocular pressure (IOP) regulation. Regulation of the extracellular matrix (ECM) by TGFβ2 signaling pathways in the TM has been extensively studied. Recent evidence has implicated toll-like receptor 4 (TLR4) in the regulation of ECM and fibrogenesis in liver, kidney, lung, and skin. Here, we investigated the role of TGFβ2-TLR4 signaling crosstalk in the regulation of the ECM in the TM and ocular hypertension...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28330785/the-interplay-between-angiotensin-ii-tlr4-and-hypertension
#8
REVIEW
Vinicia Campana Biancardi, Gisele Facholi Bomfim, Wagner Luis Reis, Sarah Al-Gassimi, Kenia Pedrosa Nunes
Hypertension is a multifactorial disease. Although a number of different underlying mechanisms have been learned from the various experimental models of the disease, hypertension still poses challenges for treatment. Angiotensin II plays an unquestionable role in blood pressure regulation acting through central and peripheral mechanisms. During hypertension, dysregulation of the Renin-Angiotensin System is associated with increased expression of pro-inflammatory cytokines and reactive oxygen species causing kidney damage, endothelial dysfunction, and increase in sympathetic activity, among other damages, eventually leading to decline in organ function...
June 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28322341/angiotensin-ii-induces-kidney-inflammatory-injury-and-fibrosis-through-binding-to-myeloid-differentiation-protein-2-md2
#9
Zheng Xu, Weixin Li, Jibo Han, Chunpeng Zou, Weijian Huang, Weihui Yu, Xiaoou Shan, Hazel Lum, Xiaokun Li, Guang Liang
Growing evidence indicates that angiotensin II (Ang II), a potent biologically active product of RAS, is a key regulator of renal inflammation and fibrosis. In this study, we tested the hypothesis that Ang II induces renal inflammatory injury and fibrosis through interaction with myeloid differentiation protein-2 (MD2), the accessory protein of toll-like receptor 4 (TLR4) of the immune system. Results indicated that in MD2(-/-) mice, the Ang II-induced renal fibrosis, inflammation and kidney dysfunction were significantly reduced compared to control Ang II-infused wild-type mice...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28282921/biglycan-and-sphingosine-kinase-1-signaling-crosstalk-regulates-the-synthesis-of-macrophage-chemoattractants
#10
Louise Tzung-Harn Hsieh, Madalina-Viviana Nastase, Heiko Roedig, Jinyang Zeng-Brouwers, Chiara Poluzzi, Stephanie Schwalm, Christian Fork, Claudia Tredup, Ralf P Brandes, Malgorzata Wygrecka, Andrea Huwiler, Josef Pfeilschifter, Liliana Schaefer
In its soluble form, the extracellular matrix proteoglycan biglycan triggers the synthesis of the macrophage chemoattractants, chemokine (C-C motif) ligand CCL2 and CCL5 through selective utilization of Toll-like receptors (TLRs) and their adaptor molecules. However, the respective downstream signaling events resulting in biglycan-induced CCL2 and CCL5 production have not yet been defined. Here, we show that biglycan stimulates the production and activation of sphingosine kinase 1 (SphK1) in a TLR4- and Toll/interleukin (IL)-1R domain-containing adaptor inducing interferon (IFN)-β (TRIF)-dependent manner in murine primary macrophages...
March 9, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28223111/expression-analysis-of-nine-toll-like-receptors-in-yellow-catfish-pelteobagrus-fulvidraco-responding-to-aeromonas-hydrophila-challenge
#11
Xiao-Ting Zhang, Gui-Rong Zhang, Ze-Chao Shi, Yu-Jie Yuan, Huan Zheng, Li Lin, Kai-Jian Wei, Wei Ji
Toll-like receptors (TLRs) are important components of pattern recognition receptors (PRRs), which play significant roles in innate immunity to defense against pathogen invasion. Many TLRs have been found in teleosts, but there are no reports about cloning and expression of TLR genes in yellow catfish (Pelteobagrus fulvidraco). In this study, we analyzed the sequence characters and the relative mRNA expression levels of nine TLRs (TLR1, TLR2, TLR3, TLR4-1, TLR5, TLR7, TLR8-2, TLR9 and TLR22) in different tissues of yellow catfish...
April 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28196866/sglt2-protein-expression-is-increased-in-human-diabetic-nephropathy-sglt2-protein-inhibition-decreases-renal-lipid-accumulation-inflammation-and-the-development-of-nephropathy-in-diabetic-mice
#12
Xiaoxin X Wang, Jonathan Levi, Yuhuan Luo, Komuraiah Myakala, Michal Herman-Edelstein, Liru Qiu, Dong Wang, Yingqiong Peng, Almut Grenz, Scott Lucia, Evgenia Dobrinskikh, Vivette D D'Agati, Hermann Koepsell, Jeffrey B Kopp, Avi Z Rosenberg, Moshe Levi
There is very limited human renal sodium gradient-dependent glucose transporter protein (SGLT2) mRNA and protein expression data reported in the literature. The first aim of this study was to determine SGLT2 mRNA and protein levels in human and animal models of diabetic nephropathy. We have found that the expression of SGLT2 mRNA and protein is increased in renal biopsies from human subjects with diabetic nephropathy. This is in contrast to db-db mice that had no changes in renal SGLT2 protein expression. Furthermore, the effect of SGLT2 inhibition on renal lipid content and inflammation is not known...
March 31, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28182789/puerarin-attenuates-cisplatin-induced-rat-nephrotoxicity-the-involvement-of-tlr4-nf-%C3%AE%C2%BAb-signaling-pathway
#13
Xu Ma, Lei Yan, Qing Zhu, Fengmin Shao
Puerarin was a major isoflavonoid derived from the Chinese medical herb radix puerariae (Gegen). In present study effect of puerarin on cisplatin nephrotoxicity was evaluated. Rat model of nephrotoxicity was established by a single intraperitoneal injection of cisplatin (7mg/kg). Puerarin was administrated through caudal vein injection once per day at the dose of 10mg/kg, 30mg/kg and 50mg/kg. Biochemical assays showed that after cisplatin treatment the serum urea and creatinine increased significantly compared with control (P<0...
2017: PloS One
https://www.readbyqxmd.com/read/28163057/slit2-ameliorates-renal-inflammation-and-fibrosis-after-hypoxia-and-lipopolysaccharide-induced-epithelial-cells-injury-in-vitro
#14
Xiangjun Zhou, Qisheng Yao, Xinbo Sun, Xiaoxin Gong, Yong Yang, Congbo Chen, Guang Shan
Hypoxic acute kidney injury (AKI) is often incompletely repaired and leads to chronic kidney disease (CKD), which is characterized by tubulointerstitial inflammation and fibrosis. The Slit2 family of secreted glycoproteins is expressed in the kidney, it has been shown to exert an anti-inflammatory activity and prevent ischemic renal injury in vivo. However, whether Slit2 reduces renal fibrosis and inflammation after hypoxic and inflammatory epithelial cells injury in vitro remains unknown. In this study, we aimed to evaluate whether Slit2 ameliorated fibrosis and inflammation in two renal epithelial cells line challenged with hypoxia and lipopolysaccharide (LPS)...
March 1, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28115850/gold-quercetin-nanoparticles-prevent-metabolic-endotoxemia-induced-kidney-injury-by-regulating-tlr4-nf-%C3%AE%C2%BAb-signaling-and-nrf2-pathway-in-high-fat-diet-fed-mice
#15
Min-Xuan Xu, Ming Wang, Wei-Wei Yang
High-fat diet-induced metabolic syndrome followed by chronic kidney disease caused by intestinal endotoxemia have received extensive attention. Toll-like receptor 4 (TLR4)/nuclear factor-kappa B (NF-κB) and oxidative stress-related Nrf2/Keap1 were regarded as the key target points involved in metabolic inflammation and kidney injury. However, the molecular mechanism of interaction between TLR4/NF-κB and Nrf2 activation in high-fat diet-induced renal injury is not absolutely understood. Quercetin, a natural product, has been reported to possess antitumor and anti-inflammatory effects...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28099145/down-regulation-of-toll-like-receptor-4-alleviates-intestinal-ischemia-reperfusion-injury-and-acute-lung-injury-in-mice
#16
Qiankun Zhu, Guizhen He, Jie Wang, Yukang Wang, Wei Chen, Tai Guo
Intestinal ischemia reperfusion (IR) injury is a critical problem, which can cause intestinal injury locally and acute lung injury (ALI) distally by inflammatory responses and oxidative stress. Toll-like receptor 4 (TLR4) is involved in innate immune and inflammatory responses. This study was to determine whether TLR4 mutant can attenuate intestinal and lung injuries after intestinal IR. Wild type (WT) and TLR4 mutant mice were submitted to intestinal IR by occluding the superior mesenteric artery. Histological assessment of the intestine and the lung were conducted by HE staining...
February 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28093813/nerolidol-protects-against-lps-induced-acute-kidney-injury-via-inhibiting-tlr4-nf-%C3%AE%C2%BAb-signaling
#17
Lu Zhang, Dandan Sun, Yan Bao, Yan Shi, Yan Cui, Minghao Guo
Acute kidney injury (AKI) is a critical care syndrome, resulting in acute reduction of renal function and up to 22% mortality of hospitalized patients. Nerolidol is a major component in several essential oils that possesses various pharmacological properties. The present study aimed to investigate the potential effect of nerolidol on lipopolysaccharide (LPS)-induced AKI. Nerolidol dose-dependently reduced the pathological injuries of kidney induced by LPS in rats. Nerolidol significantly decreased the levels of blood urea nitrogen and creatinine in LPS-treated rats in a dose-dependent manner...
March 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28028753/chlorogenic-acid-attenuates-lipopolysaccharide-induced-acute-kidney-injury-by-inhibiting-tlr4-nf-%C3%AE%C2%BAb-signal-pathway
#18
Han-Yang Ye, Jian Jin, Ling-Wei Jin, Yan Chen, Zhi-Hong Zhou, Zhan-Yuan Li
Chlorogenic acid (CGA), a polyphenolic compound, exists widely in medicinal herbs, which has been shown a strong antioxidant and anti-inflammatory effect. This study investigated the protective effects and mechanism of CGA on lipopolysaccharide (LPS)-induced acute kidney injury (AKI). Treatment of CGA successfully ameliorates LPS-induced renal function and pathological damage. Moreover, CGA dose-dependently suppressed LPS-induced blood urea nitrogen (BUN), creatinine levels, and inflammatory cytokines TNF-α, IL-6, and IL-1β in serum and tissue...
April 2017: Inflammation
https://www.readbyqxmd.com/read/28017324/the-pattern-recognition-receptor-mincle-is-essential-for-maintaining-the-m1-macrophage-phenotype-in-acute-renal-inflammation
#19
Lin L Lv, Patrick Ming-Kuen Tang, Chun J Li, Yong K You, Jinhong Li, Xiao-Ru Huang, Jun Ni, Min Feng, Bi C Liu, Hui-Yao Lan
Mincle (macrophage-inducible C-type lectin, Clec4e) is a transmembrane pattern recognition receptor involving the innate immunity, but its role in kidney disease is still unexplored. In the obstructed kidney of the unilateral ureteral obstruction model of renal injury, Mincle was specifically detected in the infiltrating M1 macrophages (CD68(+)iNOS(+) cells) on day one but was rapidly reduced following reduction of M1 macrophages during the progression of kidney injury. Interestingly, Mincle-expressing macrophages were progressively increased in the cisplatin-induced acute kidney injury model, where iNOS expression was detected in the CD68(+) cells following Mincle induction...
December 22, 2016: Kidney International
https://www.readbyqxmd.com/read/27943385/m2000-%C3%AE-d-mannuronic-acid-as-a-novel-antagonist-for-blocking-the-tlr2-and-tlr4-downstream-signalling-pathway
#20
S Aletaha, L Haddad, M Roozbehkia, R Bigdeli, V Asgary, M Mahmoudi, A Mirshafiey
To date, selective blockade of Toll-like receptor (TLR) signalling has been developed as a new approach for treatment for many inflammatory diseases. As β-D-mannuronic acid (M2000) has been known as an anti-inflammatory molecule in several experimental models, we investigated the antagonistic effects of M2000 on TLR2 and TLR4 downstream signalling transduction pathway in human embryonic kidney (HEK) 293 cell lines overexpressing TLR2/CD14 and the TLR4/MD2/CD14 complex, respectively. M2000 effectively inhibited mRNA expression of MyD88 and p65, major subunit of nuclear factor-κB, in HEK293 cells stimulated by lipoteichoic acid (LTA, a TLR2 agonist) and lipopolysaccharide (LPS, a TLR4 agonist) with no evidence of cytotoxicity...
February 2017: Scandinavian Journal of Immunology
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