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https://www.readbyqxmd.com/read/27914878/hydroxytyrosol-modulates-the-levels-of-microrna-9-and-its-target-sirtuin-1-thereby-counteracting-oxidative-stress-induced-chondrocyte-death
#1
Stefania D'Adamo, Silvia Cetrullo, Serena Guidotti, Rosa Maria Borzì, Flavio Flamigni
OBJECTIVE: Nutraceutical compounds, such as hydroxytyrosol (HT), have been found to exert protective effects in osteoarthritis (OA) by affecting a variety of key molecular and cellular processes in chondrocytes. However, to our knowledge, no relationship has been reported between nutraceuticals and microRNA (miR) network in OA models. Here, we identified a miR that is implicated in hydroxytyrosol (HT)-mediated chondroprotection following oxidative stress condition by targeting sirtuin-1 (SIRT-1)...
November 30, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/27898652/natural-mineral-rich-water-ingestion-by-ovariectomized-fructose-fed-sprague-dawley-rats-effects-on-sirtuin-1-and-glucocorticoid-signaling-pathways
#2
Jugal Kishore Das, Milton Severo, Cidália Dionísio Pereira, Emília Patrício, José Magalhães, Rosário Monteiro, Delminda Neves, Maria João Martins
OBJECTIVE: Prevention or induction of metabolic disorders and obesity depend on estrogen signaling and/or exogenous factors, such as mineral content in diet. The protective effects of a Portuguese natural mineral-rich water against the induction of metabolic syndrome in fructose-fed male Sprague-Dawley rats have been reported. The present study was designed to assess the impact of this mineral-rich water on fructose-fed estrogen-deficient female Sprague-Dawley rats. METHODS: Ovariectomized rats had access to tap (TWO) or mineral-rich (MWO) waters, with and without 10% fructose (10-wk treatment)...
November 28, 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27889467/treadmill-exercise-decreases-amyloid-%C3%AE-burden-possibly-via-activation-of-sirt-1-signaling-in-a-mouse-model-of-alzheimer-s-disease
#3
Jung-Hoon Koo, Eun-Bum Kang, Yoo-Sung Oh, Dae-Seung Yang, Joon-Yong Cho
Accumulation of amyloid-β (Aβ) correlates significantly with progressive cognitive deficits, a main symptom of Alzheimer's disease (AD). Although treadmill exercise reduces Aβ levels, the molecular mechanisms underlying the effects are not fully understood. We hypothesize that treadmill exercise decreases Aβ production and alleviates cognitive deficits by activating the non-amyloidogenic pathway via SIRT-1 signaling. Treadmill exercise improved cognitive deficits and alleviated neurotoxicity. Most importantly, treadmill exercise increased SIRT-1 level, which subsequently resulted in increased ADAM-10 level by down-regulation of ROCK-1 and upregulation of RARβ, ultimately facilitating the non-amyloidogenic pathway...
November 23, 2016: Experimental Neurology
https://www.readbyqxmd.com/read/27878478/liver-resection-after-selective-internal-radiation-therapy-with-yttrium-90-is-safe-and-feasible-a-bi-institutional-analysis
#4
G Paul Wright, J Wallis Marsh, Manish K Varma, Michael G Doherty, David L Bartlett, Mathew H Chung
BACKGROUND: Treatment with yttrium-90 (Y90) microspheres has emerged as a viable liver-directed therapy for patients with unresectable tumors and those outside transplantation criteria. A select number of patients demonstrate a favorable response and become candidates for surgical resection. METHODS: Patients who underwent selective internal radiation therapy (SIRT) with Y90 microspheres at two institutions were reviewed. Patients who underwent liver resection were included in the study...
November 22, 2016: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/27847206/the-sirt1-nf-kb-signaling-pathway-is-involved-in-regulation-of-endothelin-type-b-receptors-mediated-by-homocysteine-in-vascular-smooth-muscle-cells
#5
Yulong Chen, Huanhuan Liu, Hongmei Zhang, Enqi Liu, Cang-Bao Xu, Xingli Su
Hyperhomocysteinemia is an independent risk factor for cardiovascular diseases (CVDs). Endothelin type B (ETB) receptors were involved in the pathogenesis of CVDs. However, Sirtuin 1(Sirt1) has potential protect roles for CVDs. The present study was designed to examine the hypothesis that homocysteine up-regulates ETB receptors through down-regulation of Sirt 1. In vitro experiments were performed in rat superior mesenteric artery (SMA). The rat SMA was cultured in serum free medium for 24h in the presence and absence of homocysteine (Hcy) with or without resveroral (Res) (a Sirt 1agonist)...
November 12, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27831761/prognostic-importance-of-the-presence-of-early-metabolic-response-and-absence-of-extrahepatic-metastasis-after-selective-internal-radiation-therapy-in-colorectal-cancer-liver-metastasis
#6
Cigdem Soydal, Nuriye Ozlem Kucuk, Deniz Balci, Ethem Gecim, Sadik Bilgic, Atilla Halil Elhan
AIMS: In this study, the authors aimed to identify prognostic factors after selective internal radiation therapy (SIRT) for colorectal cancer (CRC) liver metastasis. METHODS: Forty-nine (28 male, 21 female; mean age: 64.6 ± 10.8) patients who received SIRT for CRC liver metastasis were studied. Effects of number (<5 vs. ≥5), maximum dimension, and standardized uptake value (SUV) of liver metastases, liver tumor load (<25% vs. 26%-50% vs. 51%-75%), presence of extrahepatic disease, and metabolic early response on overall survival were analyzed...
November 2016: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/27823629/javamide-i-o-methyl-ester-increases-p53-acetylation-and-induces-cell-death-via-activating-caspase-3-7-in-monocytic-thp-1-cells
#7
Jae B Park
BACKGROUND: Javamide-I and-II are phenolic amide compounds found in Coffea sp. Previous study suggested that javamide-II may be a potent compound with Sirt1/2 inhibition activity. PURPOSE: However, the effects of javamide-I and the its O-methyl ester on Sirt inhibition, p53 acetylation and cell death have not been investigated. METHODS: The isolation and synthesis of javamide-I and its O-methyl ester analogue were confirmed by NMR. Their potential effects on Sirt1/2/3, p53 acetylation and cell death were examined using sirt assay, silico analysis, Western blot, caspase 3/7 and apoptotic assay methods...
December 1, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27821083/single-administration-of-selective-internal-radiation-therapy-versus-continuous-treatment-with-sorafenib-in-locally-advanced-hepatocellular-carcinoma-sirvenib-study-protocol-for-a-phase-iii-randomized-controlled-trial
#8
Mihir Gandhi, Su Pin Choo, Choon Hua Thng, Say Beng Tan, Albert Su Chong Low, Peng Chung Cheow, Anthony Soon Whatt Goh, Kiang Hiong Tay, Richard Hoau Gong Lo, Brian Kim Poh Goh, Jen San Wong, David Chee Eng Ng, Khee Chee Soo, Wei Ming Liew, Pierce K H Chow
BACKGROUND: Approximately 20 % of hepatocellular carcinoma (HCC) patients diagnosed in the early stages may benefit from potentially curative ablative therapies such as surgical resection, transplantation or radiofrequency ablation. For patients not eligible for such options, prognosis is poor. Sorafenib and Selective Internal Radiation Therapy (SIRT) are clinically proven treatment options in patients with unresectable HCC, and this study aims to assess overall survival following either SIRT or Sorafenib therapy for locally advanced HCC patients...
November 7, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27798117/targeting-extracellular-matrix-remodeling-in-disease-could-resveratrol-be-a-potential-candidate
#9
Renu Agarwal, Puneet Agarwal
Disturbances of extracellular matrix homeostasis are associated with a number of pathological conditions. The ability of extracellular matrix to provide contextual information and hence control the individual or collective cellular behavior is increasingly being recognized. Hence, newer therapeutic approaches targeting extracellular matrix remodeling are widely investigated. We reviewed the current literature showing the effects of resveratrol on various aspects of extracellular matrix remodeling. This review presents a summary of the effects of resveratrol on extracellular matrix deposition and breakdown...
October 20, 2016: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/27767350/transradial-approach-for-hepatic-radioembolization-initial-results-and-technique
#10
Vivian L Bishay, Derek M Biederman, Thomas J Ward, Imramsjah Martijn J van der Bom, Rahul S Patel, Edward Kim, Francis S Nowakowski, Robert A Lookstein, Aaron M Fischman
OBJECTIVE: The transradial approach (TRA) has been shown to reduce the morbidity and mortality associated with arterial coronary interventions. Selective internal radiation therapy (SIRT) performed via the TRA can enhance patient comfort, compared with the traditional transfemoral approach (TFA), by allowing immediate ambulation and precluding potential complications associated with the TFA, such as closure device injury or retroperitoneal hematoma. We report our initial experience with and technique for using the TRA for SIRT...
November 2016: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/27708347/humic-acid-inhibits-hbv-induced-autophagosome-formation-and-induces-apoptosis-in-hbv-transfected-hep-g2-cells
#11
Kishor Pant, Ajay K Yadav, Parul Gupta, Abhishek Singh Rathore, Baibaswata Nayak, Senthil K Venugopal
Hepatitis B Virus (HBV) utilizes several mechanisms to survive in the host cells and one of the main pathways being autophagosome formation. Humic acid (HA), one of the major components of Mineral pitch, is an Ayurvedic medicinal food, commonly used by the people of the Himalayan regions of Nepal and India for various body ailments. We hypothesized that HA could induce cell death and inhibit HBV-induced autophagy in hepatic cells. Incubation of Hep G2.2.1.5 cells (HepG2 cells stably expressing HBV) with HA (100 μM) inhibited both cell proliferation and autophagosome formation significantly, while apoptosis induction was enhanced...
October 6, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27704463/2-deoxy-glucose-regulate-mmp-9-in-a-sirt-1%C3%A2-dependent-and-nfkb%C3%A2-independent-mechanism
#12
Lincy Edatt, K Haritha, T V Sruthi, P Aswini, V B Sameer Kumar
MMP9 is a member of the family of zinc-containing endopeptidases which degrade various components of the extracellular matrix, thereby regulating matrix remodeling. Since matrix remodeling plays an important role during growth and progression of cancer and considering the fact that, tumor cells switch to aerobic glycolysis as its major energy source, this study was designed to analyze if partial inhibition of glycolysis (the major energy pathway during hypoxia) can be used as a means to control matrix remodeling in terms of MMP9 activity and expression...
October 4, 2016: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/27702549/thioredoxin-interacting-protein-mediates-lipid-induced-impairment-of-glucose-uptake-in-skeletal-muscle
#13
Ashok Mandala, Nabanita Das, Sudarshan Bhattacharjee, Bidisha Mukherjee, Satinath Mukhopadhyay, Sib Sankar Roy
Insulin resistance (IR) is an important determinant of type-2 diabetes mellitus (T2DM). Free fatty acids (FFAs) induce IR by various mechanisms. A surfeit of circulating FFA leads to intra-myocellular lipid accumulation that induces mitochondrial ROS generation and worsens IR. However, the molecular mechanisms behind are unclear. We identified thioredoxin interacting protein (TxNIP), which is overexpressed in T2DM, to be a promoter of ROS-induced IR. We observed upregulation of TxNIP upon palmitate treatment in skeletal muscle cells that led to ROS generation and Glut-4 downregulation resulting in impaired glucose-uptake...
October 28, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27698888/mirna-regulation-of-sirtuin-1-expression-in-human-astrocytoma
#14
Sara Giovanna Romeo, Alfredo Conti, Francesca Polito, Chiara Tomasello, Valeria Barresi, Domenico La La Torre, Maria Cucinotta, Flavio Filippo Angileri, Marcello Bartolotta, Rosa Maria Di Giorgio, M'Hammed Aguennouz
Sirtuins are a family of 7 histone deacetylases largely involved in the regulation of cell proliferation, survival and death. The role of sirtuins in tumorigenesis and cancer progression has been previously studied in certain cancer types. Few studies have investigated sirtuin expression in gliomas, with controversial results. The aim of the present study was to investigate the expression of sirtuin-1 (Sirt-1) in diffuse astrocytoma [low grade astrocytoma (LGA)], anaplastic astrocytoma (AA) and glioblastoma multiforme (GBM) and in primary glioma cell lines: PLGAC (primary LGA cells); PAAC (primary AA cells); and PGBMC (primary GBM cells)...
October 2016: Oncology Letters
https://www.readbyqxmd.com/read/27697532/pep-1-sirt2-induced-matrix-metalloproteinase-1-and-13-modulates-type-ii-collagen-expression-via-erk-signaling-in-rabbit-articular-chondrocytes
#15
Seong-Hui Eo, Soo Young Choi, Song Ja Kim
Matrix metalloproteinases (MMPs) are critical for the degradation of the extracellular matrix (ECM), which includes cartilage-specific collagen types I, II and XI. We previously found that PEP-1-sirtuin (SIRT)2 could induce dedifferentiation of articular chondrocytes; however, the underlying mechanisms remains unclear. We addressed this in the present study by examining the association between PEP-1-SIRT2 and the expression of MMP-1 and MMP-13 and type II collagen in rabbit articular chondrocytes. We found that PEP-1-SIRT2 increased MMP-1 and -13 expression in a dose- and time-dependent manner, as determined by western blotting...
November 1, 2016: Experimental Cell Research
https://www.readbyqxmd.com/read/27669435/the-interaction-between-acetylation-and-serine-574-phosphorylation-regulates-the-apoptotic-function-of-foxo3
#16
Z Li, B Bridges, J Olson, S A Weinman
The multispecific transcription factor and tumor suppressor FOXO3 is an important mediator of apoptosis, but the mechanisms that control its proapoptotic function are poorly understood. There has long been evidence that acetylation promotes FOXO3-driven apoptosis and recently a specific JNK (c-Jun N-terminal kinase)-dependent S574 phosphorylated form (p-FOXO3) has been shown to be specifically apoptotic. This study examined whether acetylation and S574 phosphorylation act independently or in concert to regulate the apoptotic function of FOXO3...
September 26, 2016: Oncogene
https://www.readbyqxmd.com/read/27663717/phytosterols-and-dementia
#17
Rong Shuang, Xu Rui, Li Wenfang
As the aging of the world's population is becoming increasingly serious, dementia-related diseases have become a hot topic in public health research. In recent years, human epidemiological studies have focused on lipid metabolism disorders and dementia. The efficacy of phytosterol intake as a cholesterol-lowering agent has been demonstrated. Phytosterols directly serve as ligands of the nuclear receptors, peroxisome proliferator-activated receptors (PPARs), activating Sirtuin 1 (SIRT-1), which are involved in the regulation of lipid metabolism and the pathogenesis of dementia...
September 23, 2016: Plant Foods for Human Nutrition
https://www.readbyqxmd.com/read/27651178/hellp-syndrome-altered-hypoxic-response-of-the-fatty-acid-oxidation-regulator-sirt-4
#18
Mareike Sandvoß, Arne Björn Potthast, Frauke von Versen-Höynck, Anibh Martin Das
The hemolysis, elevated liver enzymes, and low platelet count (HELLP) syndrome is frequently observed in mothers whose offspring have long-chain fatty acid oxidation defects. We previously found that fatty acid oxidation is compromised not only in these inborn errors of metabolism but also in human umbilical vein endothelial cells (HUVECs) from all pregnancies complicated by the HELLP syndrome. Sirtuins are oxidized nicotinamide adenine dinucleotide (NAD(+))dependent deacetylases linked to the metabolic status of the cell...
September 20, 2016: Reproductive Sciences
https://www.readbyqxmd.com/read/27639555/microglial-cx3cr1-promotes-adult-neurogenesis-by-inhibiting-sirt-1-p65-signaling-independent-of-cx3cl1
#19
Sabine Sellner, Ricardo Paricio-Montesinos, Alena Spieß, Annette Masuch, Daniel Erny, Laura A Harsan, Dominik V Elverfeldt, Marius Schwabenland, Knut Biber, Ori Staszewski, Sergio Lira, Steffen Jung, Marco Prinz, Thomas Blank
Homo and heterozygote cx3cr1 mutant mice, which harbor a green fluorescent protein (EGFP) in their cx3cr1 loci, represent a widely used animal model to study microglia and peripheral myeloid cells. Here we report that microglia in the dentate gyrus (DG) of cx3cr1 (-/-) mice displayed elevated microglial sirtuin 1 (SIRT1) expression levels and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-kB) p65 activation, despite unaltered morphology when compared to cx3cr1 (+/-) or cx3cr1 (+/+) controls...
2016: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/27634872/mitochondrial-aldehyde-dehydrogenase-obliterates-insulin-resistance-induced-cardiac-dysfunction-through-deacetylation-of-pgc-1%C3%AE
#20
Nan Hu, Jun Ren, Yingmei Zhang
Insulin resistance contributes to the high prevalence of type 2 diabetes mellitus, leading to cardiac anomalies. Emerging evidence depicts a pivotal role for mitochondrial injury in oxidative metabolism and insulin resistance. Mitochondrial aldehyde dehydrogenase (ALDH2) is one of metabolic enzymes detoxifying aldehydes although its role in insulin resistance remains elusive. This study was designed to evaluate the impact of ALDH2 overexpression on insulin resistance-induced myocardial damage and mechanisms involved with a focus on autophagy...
September 12, 2016: Oncotarget
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