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https://www.readbyqxmd.com/read/28916345/is-a-technetium-99m-macroaggregated-albumin-scan-essential-in-the-workup-for-selective-internal-radiation-therapy-with-yttrium-90-an-analysis-of-532-patients
#1
Lidia Sancho, Macarena Rodriguez-Fraile, Jose Ignacio Bilbao, Carmen Beorlegui Arteta, Mercedes Iñarrairaegui, Veronica Moran, Bruno Sangro
PURPOSE: To determine if baseline patient, tumor, and pretreatment evaluation characteristics could help identify patients who require technetium-99m ((99m)Tc) macroaggregated albumin ((99m)Tc MAA) imaging before selective internal radiation therapy (SIRT). MATERIALS AND METHODS: In this retrospective analysis, 532 consecutive patients with primary (n = 248) or metastatic (n = 284) liver tumors were evaluated between 2006 and 2015. Variables were compared between patients in whom (99m)Tc MAA imaging results contraindicated/modified SIRT administration with yttrium-90 ((90)Y) resin microspheres and those who were treated as initially planned...
September 13, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28891317/the-role-of-sirtuins-in-antioxidant-and-redox-signaling
#2
Chandra K Singh, Gagan Chhabra, Mary Ndiaye, Liz Mariely Garcia-Peterson, Nicholas John Mack, Nihal Ahmad
SIGNIFICANCE: Antioxidant and redox signaling (ARS) events are regulated by critical molecules that modulate antioxidants, reactive oxygen or nitrogen species (ROS/RNS) and/or oxidative stress within the cell. Imbalances in these molecules can disturb cellular functions to become pathogenic. Sirtuins serve as important regulators of ARS in cells. Recent Advances: Sirtuins (SIRTs 1-7) are a family of nicotinamide adenine dinucleotide (NAD)-dependent histone deacetylases with the ability to deacetylate histone and non-histone targets...
September 11, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28882678/rna-interference-mediated-knockdown-of-sirt1-and-or-sirt2-in-melanoma-identification-of-downstream-targets-by-large-scale-proteomics-analysis
#3
Melissa J Wilking-Busch, Mary A Ndiaye, Xiaoqi Liu, Nihal Ahmad
Melanoma is the most notorious and fatal of all skin cancers and the existing treatment options have not been proven to effectively manage this neoplasm, especially the metastatic disease. Sirtuin (SIRT) proteins have been shown to be differentially expressed in melanoma. We have shown that SIRTs 1 and 2 were overexpressed in melanoma and inhibition of SIRT1 imparts anti-proliferative responses in human melanoma cells. To elucidate the impact of SIRT 1 and/or 2 in melanoma, we created stable knockdowns of SIRTs 1, 2, and their combination using shRNA mediated RNA interference in A375 human melanoma cells...
September 4, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28874954/aging-molecular-pathways-and-implications-on-the-cardiovascular-system
#4
REVIEW
Arthur José Pontes Oliveira de Almeida, Thaís Porto Ribeiro, Isac Almeida de Medeiros
The world's population over 60 years is growing rapidly, reaching 22% of the global population in the next decades. Despite the increase in global longevity, individual healthspan needs to follow this growth. Several diseases have their prevalence increased by age, such as cardiovascular diseases, the leading cause of morbidity and mortality worldwide. Understanding the aging biology mechanisms is fundamental to the pursuit of cardiovascular health. In this way, aging is characterized by a gradual decline in physiological functions, involving the increased number in senescent cells into the body...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28869259/anti-hyperlipidemic-effect-of-rice-bran-polysaccharide-and-its-potential-mechanism-in-high-fat-diet-mice
#5
Ying Nie, Feijun Luo, Long Wang, Tao Yang, Limin Shi, Xinhua Li, Junjun Shen, Wei Xu, Ting Guo, Qinlu Lin
Hyperlipidemia occurs very often in modern society along with a high calorie intake and is regarded as one of the greatest risk factors for the prevalence of cardiac vascular disease (CVD). In this study, we investigated the anti-hyperlipidemic effect of the rice bran polysaccharides (RBP) and its mechanism in a high fat diet animal model. 60 ICR mice were randomly divided into 3 groups, which included Control, HFD (high fat diet) and HFD + RBP, and each group included 20 mice. The control group was fed with a standard diet while the other two groups were fed with HFD...
September 4, 2017: Food & Function
https://www.readbyqxmd.com/read/28840510/cypermethrin-activates-autophagosome-formation-albeit-inhibits-autophagy-owing-to-poor-lysosome-quality-relevance-to-parkinson-s-disease
#6
Abhishek Kumar Mishra, Saumya Mishra, Charul Rajput, Mohd Sami Ur Rasheed, Devendra Kumar Patel, Mahendra Pratap Singh
Parkinson's disease (PD) is the second most familiar, progressive and movement-related neurodegenerative disorder after Alzheimer disease. This study aimed to decipher the role of autophagy in cypermethrin-induced Parkinsonism, an animal model of PD. Indicators of autophagy [expression of beclin 1, autophagy-related protein 12 (Atg 12), unc-51 like autophagy activating kinase 1 (Ulk 1), p62 and lysosome-associated membrane protein 2 (LAMP 2) and conversion of microtubule-associated protein 1A/1B-light chain 3 (LC3) I to II], signalling cascade [phosphorylated (p) 5' adenosine monophosphate-activated protein kinase (p-AMPK), sirtuin 1 (Sirt 1), phosphorylated-mammalian target of rapamycin (p-mTOR), tuberous sclerosis complex 2 (TSC 2), p317Ulk 1 and p757Ulk 1 levels] and lysosome morphology were assessed in control and cypermethrin-treated rat model of PD...
August 24, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/28834965/response-evaluation-of-malignant-liver-lesions-after-tace-sirt-comparison-of-manual-and-semi-automatic-measurement-of-different-response-criteria-in-multislice-ct
#7
Anna Janina Höink, Christoph Schülke, Raphael Koch, Annika Löhnert, Sara Kammerer, Rasmus Fortkamp, Walter Heindel, Boris Buerke
Purpose To compare measurement precision and interobserver variability in the evaluation of hepatocellular carcinoma (HCC) and liver metastases in MSCT before and after transarterial local ablative therapies. Materials and Methods Retrospective study of 72 patients with malignant liver lesions (42 metastases; 30 HCCs) before and after therapy (43 SIRT procedures; 29 TACE procedures). Established (LAD; SAD; WHO) and vitality-based parameters (mRECIST; mLAD; mSAD; EASL) were assessed manually and semi-automatically by two readers...
August 23, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28827681/sirt1-reduction-is-associated-with-sex-specific-dysregulation-of-renal-lipid-metabolism-and-stress-responses-in-offspring-by-maternal-high-fat-diet
#8
Long The Nguyen, Hui Chen, Carol Pollock, Sonia Saad
Rodent models of maternal obesity have been associated with kidney damage and dysfunction in offspring. However, the underlying mechanisms are yet to be elucidated. In this study, female rats were fed a high-fat diet (HFD) for 6 weeks prior to mating, throughout gestation and lactation; both male and female offspring were examined at weaning. Our results demonstrate that renal lipid deposition was increased in male offspring only, which is associated with reduced protein expression of Sirtuin (SIRT) 1, an essential regulator of lipid metabolism and stress response...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28808418/emerging-roles-of-sirt1-in-fatty-liver-diseases
#9
REVIEW
Ren-Bo Ding, Jiaolin Bao, Chu-Xia Deng
Fatty liver diseases, which are commonly associated with high-fat/calorie diet, heavy alcohol consumption and/or other metabolic disorder causes, lead to serious medical concerns worldwide in recent years. It has been demonstrated that metabolic homeostasis disruption is most likely to be responsible for this global epidemic. Sirtuins are a group of conserved nicotinamide adenine dinucleotide (NAD(+)) dependent histone and/or protein deacetylases belonging to the silent information regulator 2 (Sir2) family...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28781171/first-line-selective-internal-radiotherapy-plus-chemotherapy-versus-chemotherapy-alone-in-patients-with-liver-metastases-from-colorectal-cancer-foxfire-sirflox-and-foxfire-global-a-combined-analysis-of-three-multicentre-randomised-phase-3-trials
#10
Harpreet S Wasan, Peter Gibbs, Navesh K Sharma, Julien Taieb, Volker Heinemann, Jens Ricke, Marc Peeters, Michael Findlay, Andrew Weaver, Jamie Mills, Charles Wilson, Richard Adams, Anne Francis, Joanna Moschandreas, Pradeep S Virdee, Peter Dutton, Sharon Love, Val Gebski, Alastair Gray, Guy van Hazel, Ricky A Sharma
BACKGROUND: Data suggest selective internal radiotherapy (SIRT) in third-line or subsequent therapy for metastatic colorectal cancer has clinical benefit in patients with colorectal liver metastases with liver-dominant disease after chemotherapy. The FOXFIRE, SIRFLOX, and FOXFIRE-Global randomised studies evaluated the efficacy of combining first-line chemotherapy with SIRT using yttrium-90 resin microspheres in patients with metastatic colorectal cancer with liver metastases. The studies were designed for combined analysis of overall survival...
August 3, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28768896/the-effects-of-graded-levels-of-calorie-restriction-xi-evaluation-of-the-main-hypotheses-underpinning-the-life-extension-effects-of-cr-using-the-hepatic-transcriptome
#11
Davina Derous, Sharon E Mitchell, Lu Wang, Cara L Green, Yingchun Wang, Luonan Chen, Jing-Dong J Han, Daniel E L Promislow, David Lusseau, Alex Douglas, John R Speakman
Calorie restriction (CR) may extend longevity by modulating the mechanisms involved in aging. Different hypotheses have been proposed for its main mode of action. We quantified hepatic transcripts of male C57BL/6 mice exposed to graded levels of CR (0% to 40% CR) for three months, and evaluated the responses relative to these various hypotheses. Of the four main signaling pathways implied to be linked to the impact of CR on lifespan (insulin/insulin like growth factor 1 (IGF-1), nuclear factor-kappa beta (NF-ĸB), mechanistic target of rapamycin (mTOR) and sirtuins (SIRTs)), all the pathways except SIRT were altered in a manner consistent with increased lifespan...
July 31, 2017: Aging
https://www.readbyqxmd.com/read/28750181/sirt-1-regulates-tgf-%C3%AE-induced-dermal-fibroblast-migration-via-modulation-of-cyr61-expression
#12
Eun-Jeong Kwon, Eun-Jung Park, Hyeran Yu, Jung-Sik Huh, Jinseok Kim, Moon-Jae Cho
SIRT1 is a NAD-dependent protein deacetylase that participates in cellular regulation. The increased migration of fibroblasts is an important phenotype in fibroblast activation. The role of SIRT1 in cell migration remains controversial as to whether SIRT1 acts as an activator or suppressor of cell migration. Therefore, we have established the role of SIRT1 in the migration of human dermal fibroblasts and explored targets of SIRT1 during dermal fibroblast migration. SIRT1 and Cyr61 were expressed in human dermal fibroblasts and the stimulation with TGF-β further induced their expression...
July 27, 2017: Connective Tissue Research
https://www.readbyqxmd.com/read/28721137/beneficial-effects-of-n-3-polyunsaturated-fatty-acids-on-adiponectin-levels-and-adipor-gene-expression-in-patients-with-type-2-diabetes-mellitus-a-randomized-placebo-controlled-double-blind-clinical-trial
#13
Maryam Mazaherioun, Ahmad Saedisomeolia, Mohammad Hassan Javanbakht, Fariba Koohdani, Mohammad Reza Eshraghian, Mahmoud Djalali
INTRODUCTION: There is evidence that n-3 polyunsaturated fatty acids (n-3 PUFAs) exert beneficial effects to improve type 2 diabetes mellitus (T2DM), but its complications remain poorly understood. Hypoadiponectinemia is one of the important mechanisms responsible for T2DM which necessitates developing novel therapeutic strategies. We aimed to determine the effect of n-3 PUFA supplementation on circulating adiponectin and mRNA expression of adiponectin receptors (AdipoR1, AdipoR2) and Sirt-1 in T2DM patients...
June 2017: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/28718701/occludin-regulates-glucose-uptake-and-atp-production-in-pericytes-by-influencing-amp-activated-protein-kinase-activity
#14
Victor Castro, Marta Skowronska, Jorge Lombardi, Jane He, Neil Seth, Martina Velichkovska, Michal Toborek
Energetic regulation at the blood-brain barrier is critical for maintaining its integrity, transport capabilities, and brain demands for glucose. However, the underlying mechanisms that regulate these processes are still poorly explored. We recently characterized the protein occludin as a NADH oxidase and demonstrated its influence on the expression and activation of the histone deacetylase SIRT-1. Because SIRT-1 works in concert with AMP-activated protein kinase (AMPK) (AMPK), we investigated the impact of occludin on this metabolic switch...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28713986/hydrogen-sulfide-prevents-homocysteine%C3%A2-induced-endoplasmic-reticulum-stress-in-pc12-cells-by-upregulating-sirt%C3%A2-1
#15
Chun-Yan Wang, Wei Zou, Xiao-Yu Liang, Zhi-Sheng Jiang, Xiang Li, Hai-Jun Wei, Yi-Yun Tang, Ping Zhang, Xiao-Qing Tang
It was previously confirmed that hydrogen sulfide (H2S) has a neuroprotective effect, preventing homocysteine‑induced neurotoxicity. However, the exact molecular mechanisms underlying this protective effect remain to be fully elucidated. Endoplasmic reticulum (ER) stress contributes to homocysteine‑induced neurotoxicity. Silent mating type information regulator 2 homolog 1 (SIRT‑1) can attenuate ER stress, exerting its neuroprotective effect. Therefore, the present study aimed to investigate whether H2S protects PC12 cells against homocysteine‑induced ER stress and whether SIRT‑1 mediates this protective effect of H2S...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28702557/synthesis-characterization-and-in-vitro-and-in-vivo-photodynamic-activities-of-a-gallium-iii-tris-ethoxycarbonyl-corrole
#16
Zhao Zhang, Hua-Hua Wang, Hua-Jun Yu, Yu-Zhen Xiong, Hai-Tao Zhang, Liang-Nian Ji, Hai-Yang Liu
Corroles have been previously demonstrated to be a new and promising photosensitizer (PS) in photodynamic therapy (PDT) for cancer cells. This research reported the preparation of an electron-deficient flat gallium(iii) tris(ethoxycarbonyl)corrole (1-Ga). Its in vitro PDT activities towards different cancer cell lines were examined, and the best PDT activity was observed in A549 cell lines. 1-Ga could penetrate the cell membrane rapidly and exhibit remarkable photo-cytotoxicity. 1-Ga can induce A549 cell apoptosis via ROS-mediated mitochondrial pathways, in which p38 and sirt-1 proteins play a key role...
July 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28698968/inhibition-of-poly-adp-ribose-polymerase-1-enhances-gene-expression-of-selected-sirtuins-and-app-cleaving-enzymes-in-amyloid-beta-cytotoxicity
#17
Przemysław L Wencel, Walter J Lukiw, Joanna B Strosznajder, Robert Piotr Strosznajder
Poly(ADP-ribose) polymerases (PARPs) and sirtuins (SIRTs) are involved in the regulation of cell metabolism, transcription, and DNA repair. Alterations of these enzymes may play a crucial role in Alzheimer's disease (AD). Our previous results indicated that amyloid beta (Aβ) peptides and inflammation led to activation of PARP1 and cell death. This study focused on a role of PARP1 in the regulation of gene expression for SIRTs and beta-amyloid precursor protein (βAPP) cleaving enzymes under Aβ42 oligomers (AβO) toxicity in pheochromocytoma cells (PC12) in culture...
July 12, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28675952/a-novel-fine-tuning-scheme-of-mir-200c-in-modulating-lung-cell-redox-homeostasis
#18
Yi-Hsuan Wu, Hsin-Ru Lin, Ying-Hsuan Lee, Pin-Hao Huang, Huei-Chung Wei, Arnold Stern, Daniel Tsun-Yee Chiu
Oxidative stress induces miR-200c, the predominant microRNA (miRNA) in lung tissues; however, the antioxidant role and biochemistry of such induction have not been clearly defined. Therefore, a lung adenocarcinoma cell line (A549) and a normal lung fibroblast (MRC-5) were used as models to determine the effects of miR-200c expression on lung antioxidant response. Hydrogen peroxide (H2O2) upregulated miR-200c, whose overexpression exacerbated the decrease in cell proliferation, retarded the progression of cells in the G2/M-phase, and increased oxidative stress upon H2O2 stimulation...
July 4, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28653161/the-post-sir-spheres-surgery-study-p4s-retrospective-analysis-of-safety-following-hepatic-resection-or-transplantation-in-patients-previously-treated-with-selective-internal-radiation-therapy-with-yttrium-90-resin-microspheres
#19
Fernando Pardo, Bruno Sangro, Rheun-Chuan Lee, Derek Manas, Rohan Jeyarajah, Vincent Donckier, Geert Maleux, Antonio D Pinna, Lourens Bester, David L Morris, David Iannitti, Pierce K Chow, Richard Stubbs, Paul J Gow, Gianluca Masi, Kevin T Fisher, Wan Y Lau, Konstantinos Kouladouros, Georgios Katsanos, Giorgio Ercolani, Fernando Rotellar, José I Bilbao, Michael Schoen
BACKGROUND: Reports show that selective internal radiation therapy (SIRT) may downsize inoperable liver tumors to resection or transplantation, or enable a bridge-to-transplant. A small-cohort study found that long-term survival in patients undergoing resection following SIRT appears possible but no robust studies on postsurgical safety outcomes exist. The Post-SIR-Spheres Surgery Study was an international, multicenter, retrospective study to assess safety outcomes of liver resection or transplantation following SIRT with yttrium-90 (Y-90) resin microspheres (SIR-Spheres(®); Sirtex)...
September 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28650731/combination-treatments-with-luteolin-and-fisetin-enhance-anti-inflammatory-effects-in-high-glucose-treated-thp-1-cells-through-histone-acetyltransferase-histone-deacetylase-regulation
#20
Arang Kim, Jung-Mi Yun
Hyperglycemia leads to diabetes and its diabetic complications. In this study, we investigated the synergistic effects of luteolin and fisetin on proinflammatory cytokine secretion and its underlying epigenetic regulation in human monocytes exposed to hyperglycemic (HG) concentrations. Human monocytic cells (THP-1) were cultured under controlled (14.5 mM mannitol), normoglycemic (5.5 mM glucose), or HG (20 mM glucose) conditions in the absence or presence of the two phytochemicals for 48 h. Whereas HG conditions significantly induced histone acetylation, nuclear factor-kappa B (NF-κB) activation, interleukin 6, and tumor necrosis factor-α release from THP-1 cells; combination treatments with the two phytochemicals (500 nM fisetin, and l μM and 500 nM luteolin) suppressed NF-κB activity and inflammatory cytokine release...
August 2017: Journal of Medicinal Food
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