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Total 281 results found since Jan 2013.

High Fat and Diet Induced Obesity
i-FectTM Delivers Again!Research shows that rats and humans on a high-fat diet (HFD) are less sensitive to satiety signals known to act via vagal afferent pathways. Impaired vagal afferent responsiveness to both gastric satiety hormones (CCK and leptin) and mechanical stimulation raises the possibility that changes in electrophysiological properties may be the underlying mechanism responsible for impaired vagal responsiveness to a wide variety of satiety signals.Potassium channels play a central role. To demonstrate this researchers used ouri-Fect siRNA Transfection Kit to silence TRESK and TASK1 to understand their impact...
Source: siRNA and DsiRNA Transfection Efficiency - September 16, 2019 Category: Neuroscience Tags: iFect in vivo siRNA intrathecal delivery of siRNA RNAi TRESK Source Type: news

Anti-HB-EGF Antibody-Mediated Delivery of siRNA to Atherosclerotic Lesions in Mice.
Authors: Tsuchida S, Matsuzaki T, Yamato M, Okuda K, Fu HY, Araki R, Sanada S, Asanuma H, Asano Y, Asakura M, Hao H, Takashima S, Kitakaze M, Sakata Y, Mekada E, Minamino T Abstract For atherosclerotic cardiovascular diseases (ACD), gene therapy may be a potential therapeutic strategy; however, lack of effective and safe methods for gene delivery to atherosclerotic plaques have limited its potential therapeutic applications. To overcome this limitation, we developed a novel antibody-based gene delivery system (anti-HB-EGF/NA vector) by chemically crosslinking antibodies against human heparin-binding epidermal growt...
Source: International Heart Journal - November 7, 2018 Category: Cardiology Tags: Int Heart J Source Type: research

Evaluation of an Integrin αvβ3 Radiotracer, 18FF-FPP-RGD2, for Monitoring Pharmacological Effects of Integrin αv siRNA in the NASH Liver
ConclusionThis study suggests that [18F]F-FPP-RGD2 PET imaging is a promising radiotracer for monitoring hepatic integrin αv protein levels and hepatic function in NASH pathology.
Source: Nuclear Medicine and Molecular Imaging - March 7, 2023 Category: Nuclear Medicine Source Type: research

Evaluation of an Integrin α < sub > v < /sub > β < sub > 3 < /sub > Radiotracer, < sup > 18 < /sup > FF-FPP-RGD < sub > 2 < /sub > , for Monitoring Pharmacological Effects of Integrin α < sub > v < /sub > siRNA in the NASH Liver
CONCLUSION: This study suggests that [18F]F-FPP-RGD2 PET imaging is a promising radiotracer for monitoring hepatic integrin αv protein levels and hepatic function in NASH pathology.PMID:37483876 | PMC:PMC10359219 | DOI:10.1007/s13139-023-00791-9
Source: Molecular Medicine - July 24, 2023 Category: Molecular Biology Authors: Shuichi Hiroyama Keiko Matsunaga Miwa Ito Hitoshi Iimori Ippei Morita Jun Nakamura Eku Shimosegawa Kohji Abe Source Type: research

TonEBP Suppresses the HO-1 Gene by Blocking Recruitment of Nrf2 to Its Promoter
Discussion Dynamic changes in the functional phenotype of macrophages are associated with pathogenesis of inflammatory diseases (5–7). TonEBP primes macrophages toward an M1 phenotype, which has pro-inflammatory properties. TonEBP does this by promoting expression of pro-inflammatory genes via interaction with NF-κB (36) and by binding directly to the promoter (37, 64). In addition, TonEBP suppresses expression of the anti-inflammatory cytokine IL-10 by limiting chromatin access to the promoter (37). The pro-inflammatory function of TonEBP suggests that inhibiting its expression or activation could suppres...
Source: Frontiers in Immunology - April 17, 2019 Category: Allergy & Immunology Source Type: research

Tangshen Formula Alleviates Hepatic Steatosis by Inducing Autophagy Through the AMPK/SIRT1 Pathway
Conclusion In conclusion, the present study demonstrated that autophagy was involved in relieving the effects of TSF against NAFLD, which were mediated by the AMPK/SIRT1 pathway (Figure 7D). These findings may improve our current understanding of the role of TSF in treating hepatic steatosis and provide an experimental basis for the clinical application of TSF in NAFLD and its related metabolic syndrome. Ethics Statement This study was carried out in accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. The protocol was approved by the Ethics Co...
Source: Frontiers in Physiology - April 25, 2019 Category: Physiology Source Type: research

Chemerin/CMKLR1 Axis Promotes Inflammation and Pyroptosis by Activating NLRP3 Inflammasome in Diabetic Cardiomyopathy Rat
In this study, we investigated the role of the chemerin/CMKLR1 axis in mediating inflammation and cell death in DCM. Sprague–Dawley rats, treated with a high-fat diet and low-dose of streptozotocin, were used as a DCM model. CMKLR1 expression was knocked down by siRNA (CMKLR1-siRNA) to evaluate the role of CMKLR1 in DCM. Chemerin-treated H9c2 cells were used to investigate the factors acting downstream of the chemerin/CMKLR1 axis. LDH release and EthD-III staining were used to measure the ratio of cell death in vitro. CMKLR1-siRNA and siRNA against nucleotide-binding oligomerization domain-like receptors 3 (NLRP3-siRNA) ...
Source: Frontiers in Physiology - April 22, 2020 Category: Physiology Source Type: research

Lipopolysaccharide promoted proliferation and adipogenesis of preadipocytes through JAK/STAT and AMPK-regulated cPLA2 expression.
Authors: Chang CC, Sia KC, Chang JF, Lin CM, Yang CM, Huang KY, Lin WN Abstract The proliferation and adipogenesis of preadipocytes played important roles in the development of adipose tissue and contributed much to the processes of obesity. On the other hand, lipopolysaccharide (LPS), also known as endotoxin, is a key outer membrane component of gram-negative bacteria in the gut microbiota, and has a dominant role in linking inflammation to high-fat diet-induced metabolic syndrome. Studies suggested the potential roles of LPS in hepatic steatosis and in obese mice models. However, the molecular mechanisms underlyi...
Source: International Journal of Medical Sciences - January 22, 2019 Category: Biomedical Science Tags: Int J Med Sci Source Type: research

Endothelial autophagy deficiency induces IL6 - dependent endothelial mesenchymal transition and organ fibrosis.
Abstract Macroautophagy/autophagy plays a vital role in the homeostasis of diverse cell types. Vascular endothelial cells contribute to vascular health and play a unique role in vascular biology. Here, we demonstrated that autophagy defects in endothelial cells induced IL6 (interleukin 6)-dependent endothelial-to-mesenchymal transition (EndMT) and organ fibrosis with metabolic defects in mice. Inhibition of autophagy, either by a specific inhibitor or small interfering RNA (siRNA) for ATG5 (autophagy related 5), in human microvascular endothelial cells (HMVECs) induced EndMT. The IL6 level was significantly higher...
Source: Autophagy - January 21, 2020 Category: Cytology Authors: Takagaki Y, Lee SM, Dongqing Z, Kitada M, Kansaki K, Koya D Tags: Autophagy Source Type: research

Hyperlipidemia-induced hepassocin in the liver contributes to insulin resistance in skeletal muscle
In conclusion, we elucidated that ER stress induced by palmitate could increase the expression of HPS in hepatocytes and further contribute to the development of insulin resistance in skeletal muscle via EGFR/JNK-mediated pathway. Taken together, we suggest that HPS could be a therapeutic target for obesity-linked insulin resistance. Graphical abstract
Source: Molecular and Cellular Endocrinology - October 28, 2017 Category: Endocrinology Source Type: research

Resveratrol prevents sarcopenic obesity by reversing mitochondrial dysfunction and oxidative stress via the PKA/LKB1/AMPK pathway.
CONCLUSIONS: Resveratrol prevented high-fat diet-induced muscle atrophy in aged rats by reversing mitochondrial dysfunction and oxidative stress, which was partially mediated by the PKA/LKB1/AMPK pathway. These findings indicate that resveratrol might have potential uses for the prevention and treatment of sarcopenic obesity. PMID: 30988232 [PubMed - as supplied by publisher]
Source: Aging - April 14, 2019 Category: Biomedical Science Authors: Huang Y, Zhu X, Chen K, Lang H, Zhang Y, Hou P, Ran L, Zhou M, Zheng J, Yi L, Mi M, Zhang Q Tags: Aging (Albany NY) Source Type: research

Macrophage Sphingosine 1-Phosphate Receptor 2 Blockade Attenuates Liver Inflammation and Fibrogenesis Triggered by NLRP3 Inflammasome
NLR family pyrin domain containing 3 (NLRP3) inflammasome accompanies chronic liver injury and is a critical mediator of inflammation-driven liver fibrosis. Sphingosine 1-phosphate (S1P)/S1P Receptor (S1PR) signaling participates in liver fibrogenesis by affecting bone marrow (BM)-derived monocytes/macrophage (BMM) activation. However, the relationship between S1P/S1PR signaling and NLRP3 inflammasome in BMMs remains unclear. Here, we found significantly elevated gene expression of NLRP3 inflammasome components (NLRP3, pro-interleukin-1β, and pro-interleukin-18) and the activation of NLRP3 inflammasome significantly eleva...
Source: Frontiers in Immunology - June 25, 2020 Category: Allergy & Immunology Source Type: research

Thymosin beta 4 alleviates non-alcoholic fatty liver by inhibiting ferroptosis via up-regulation of GPX4
This study revealed that Tβ4 protects hepatocytes by inhibiting the GPX4-mediated ferroptosis pathway, which provides a new strategy and target for the treatment of NAFLD.PMID:34280397 | DOI:10.1016/j.ejphar.2021.174351
Source: European Journal of Pharmacology - July 19, 2021 Category: Drugs & Pharmacology Authors: Zixin Zhu Ya Zhang Xinhao Huang Li Can Xueke Zhao Yinghui Wang Jing Xue Mingliang Cheng Lili Zhu Source Type: research