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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

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

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

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

Cannabinoid receptor type 1 mediates high-fat diet-induced insulin resistance by increasing forkhead box O1 activity in a mouse model of obesity.
Abstract Hepatic glucose production is promoted by forkhead box O1 (FoxO1) under conditions of insulin resistance. The overactivity of cannabinoid receptor type 1 (CB1R) partly causes increased liver fat deposits and metabolic dysfunction in obese rodents by decreasing mitochondrial function. The aim of the present study was to investigate the role of FoxO1 in CB1R-mediated insulin resistance through the dysregulation of mitochondrial function in the livers of mice with high-fat diet (HFD)-induced obesity. For this purpose, male C57BL/6 mice were randomly assigned to groups and either fed a standard diet (ST...
Source: International Journal of Molecular Medicine - January 29, 2016 Category: Molecular Biology Authors: Chen CC, Lee TY, Kwok CF, Hsu YP, Shih KC, Lin YJ, Ho LT Tags: Int J Mol Med Source Type: research

Glucagon-like peptide-1 analog prevents obesity-related glomerulopathy by inhibiting excessive autophagy in podocytes.
CONCLUSION: Excess autophagy in podocytes was induced by inhibition of Glut4 translocation to the plasma membrane and was involved in the pathology of ORG. GLP-1 restored insulin sensitivity and ameliorated renal injury by decreasing the level of autophagy. PMID: 29070572 [PubMed - as supplied by publisher]
Source: Am J Physiol Renal P... - October 25, 2017 Category: Urology & Nephrology Authors: Guo H, Wang B, Li H, Ling L, Niu J, Gu Y Tags: Am J Physiol Renal Physiol Source Type: research

Genome-wide profiling of histone H3K27 acetylation featured fatty acid signalling in pancreatic beta cells in diet-induced obesity in mice
Conclusions/interpretationThese results suggest novel roles for DNA-binding proteins and fatty acid signalling in obesity-induced epigenomic regulation of beta cell function.Data availabilityThe next-generation sequencing data in the present study were deposited at ArrayExpress.RNA-Seq:Dataset name: ERR2538129 (Control), ERR2538130 (Diet-induced obesity)Repository name and number: E-MTAB-6718 - RNA-Seq of pancreatic islets derived from mice fed a long-term high-fat diet against chow-fed controls.ChIP-Seq:Dataset name: ERR2538131 (Control), ERR2538132 (Diet-induced obesity)Repository name and number: E-MTAB-6719 - H3K27ac C...
Source: Diabetologia - November 5, 2018 Category: Endocrinology Source Type: research

Increasing Upstream Chromatin Long –Range Interactions May Favor Induction of Circular RNAs in LysoPC-Activated Human Aortic Endothelial Cells
We examined the sponging potential of all significantly changed circRNAs using the CircInteractome database (Montefiori et al., 2018), recording two miRNAs with four or more predicted binding sites in a single circRNA transcript, a threshold above which meaningful sponging activity is likely to occur Memczak et al. (2013). Another four significantly changed circRNAs are experimentally shown to sponge miRNAs (Dudekula et al., 2016; Chen et al., 2017; Yan et al., 2017; Wang et al., 2018), for six total circRNAs with miRNA sponging activity including miR125, miR143, miR1272, miR153, miR515-5p, and miR196a-5p (Table 4). In Fig...
Source: Frontiers in Physiology - April 17, 2019 Category: Physiology Source Type: research

Interleukin-27 decreases ghrelin production through signal transducer and activator of transcription 3—mechanistic target of rapamycin signaling
In conclusion, IL-27 suppresses ghrelin production through the STAT3-mTOR dependent mechanism.Graphical abstractIL-27 stimulates the activity of STAT3 and mTOR. IL-27 also enhances the interaction between STAT3 and mTOR, leading to the subsequent inhibition of ghrelin expression and appetite.
Source: Acta Pharmaceutica Sinica B - January 8, 2020 Category: Cancer & Oncology Source Type: research

AMPK upregulates KCa2.3 channels and ameliorates endothelial dysfunction in diet-induced obese mice.
Abstract The opening of endothelial small-conductance calcium-activated potassium channels (KCa2.3) is essential for endothelium-dependent hyperpolarization (EDH), which predominantly occurs in small resistance arteries. Adenosine monophosphate-activated protein kinase (AMPK), an important metabolic regulator, has been implicated in regulating endothelial nitric oxide synthase activity. However, it was unclear whether AMPK regulated endothelial KCa2.3-mediated EDH-type vasodilation. Using bioinformatics analysis and myograph system, we investigated the regulation by AMPK of KCa2.3 in human umbilical vein endotheli...
Source: Biochemical Pharmacology - November 10, 2020 Category: Drugs & Pharmacology Authors: Pang ZD, Wang Y, Song Z, She G, Ma XZ, Sun X, Wu W, Lai BC, Zhang J, Zhang Y, Du XJ, Shyy JYJ, Deng XL Tags: Biochem Pharmacol Source Type: research

Berberine improves dietary-induced cardiac remodeling by upregulating Kruppel-like factor 4-dependent mitochondrial function.
Authors: Ding L, Li S, Wang F, Xu J, Li S, Wang B, Kou J, Wang Y, Cao W Abstract Multiple studies have showed that berberine protects against heart diseases, including obesityassociated cardiomyopathy. However, it is not fully disclosed the potential molecular mechanisms of berberine on controlling cardiac remodelling. Kruppel-like factor (KLF) 4, identified as a critical transcriptional factor, participates in multiple cardiac injuries. The present study was to explore whether KLF4 determined the cardioprotective benefits of berberine in dietary-induced obese mice. High fat diet-induced obese mice were treated wit...
Source: Biological Chemistry - February 7, 2021 Category: Chemistry Tags: Biol Chem Source Type: research

Patchouli alcohol improves wound healing in high fat diet-fed mice through AMPK-mediated suppression of inflammation and TGFb1 signaling
Biochem Biophys Res Commun. 2021 May 20;561:136-142. doi: 10.1016/j.bbrc.2021.05.036. Online ahead of print.ABSTRACTObesity impairs wound healing with substantial alterations in skin inflammation. Patchouli alcohol (PA), extracted from patchouli, has been reported to ameliorate inflammation in various cell types. However, the effects of PA on inflammation and wound healing have not been reported to date. In the present study, we examined whether PA affects cutaneous wound healing in high fat diet (HFD)-fed mice and explored PA-mediated molecular mechanisms through in vitro experiments. We found that PA administration accel...
Source: Biochemical and Biophysical Research communications - May 23, 2021 Category: Biochemistry Authors: Tae Jin Kim Do Hyeon Pyun Seung Yeon Park Hyun Jung Lee A M Abd El-Aty Jin-Ho Song Yong Kyoo Shin Ji Hoon Jeong Tae Woo Jung Source Type: research

Therapeutic DNA vaccine encoding CEMIP (KIAA1199) ameliorates kidney fibrosis in obesity through inhibiting the Wnt/ β-catenin pathway
CONCLUSION: DNA vaccine targeting CEMIP/Wnt1/β-catenin pathway plays a novel strategy in nephropathy.GENERAL SIGNIFICANCE: Immune therapy might provide a new therapeutic option on nephropathy of obesity.PMID:34582938 | DOI:10.1016/j.bbagen.2021.130019
Source: Biochimica et Biophysica Acta - September 28, 2021 Category: Biochemistry Authors: Chao-Hung Chen Guan-Ming Ke Pi-Chen Lin Kun-Der Lin Source Type: research

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