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https://www.readbyqxmd.com/read/29245171/effects-of-atorvastatin-on-autophagy-in-skeletal-muscles-of-diabetic-rats
#1
Bingquan Yang, Jie Sun, Yang Yuan, Zilin Sun
AIMS/INTRODUCTION: Atorvastatin is usually used to decrease the amount of fatty substances in individuals with type 2 diabetes mellitus. However, it can cause side effects, such as breakdown of skeletal muscle tissue. This study focuses on the effects of atorvastatin on autophagy of the skeletal muscles in diabetic rats. MATERIALS AND METHODS: Diabetes in rats in the diabetic (D) and atorvastatin (T) groups was induced using streptozotocin (65 mg/kg, intraperitoneal injection)...
December 15, 2017: Journal of Diabetes Investigation
https://www.readbyqxmd.com/read/29244256/myricetin-induces-protective-autophagy-by-inhibiting-the-phosphorylation-of-mtor-in-hepg2-cells
#2
Jianping Cao, Hanwen Chen, Wei Lu, Yihua Wu, Xia Wu, Dajing Xia, Jiang Zhu
Myricetin, a natural flavonoid present in a variety of fruits and vegetables, has been studied as a promising cancer chemopreventive agent in many cancer models. It has been reported that myricetin could inhibit tumor promotion by inducing cell cycle arrest and promoting apoptotic cell death. At present, autophagy is considered to be closely associated with cancer, functioning as either an anti-cancer or pro-cancer mechanism depending on the cancer stage. Till date, the role of myricetin in regulating autophagy has not been reported...
December 15, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29244196/iron-overload-induces-g1-phase-arrest-and-autophagy-in-murine-preosteoblast-cells
#3
Wan-Jing Cen, Yi Feng, Shu-Shu Li, Wei-Liang Huang, Tao Zhang, Wu Zhang, Wei-Dong Kong, Jian-Wei Jiang
This study aimed to investigate the cell cycle arrest and autophagy induced by iron overload inMC3T3-E1 cells. MC3T3-E1 cells were cultured in different concentrations of ferric ammonium citrate (FAC), and Perls' Prussian blue reaction was used to detect the iron levels of the cells. CCK-8 assays were used to detect the growth of MC3T3-E1. The level of reactive oxygen species (ROS) within cells was investigated with DCFH-DA. PI staining was used to analyze the cell cycle distribution of MC3T3-E1 cells. Finally, the expression levels of cell cycle related proteins, autophagy related proteins, AKT, p38 MAPK, Stat3 and their downstream proteins were detected with western blot assays...
December 15, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29243797/rapamycin-induces-human-acute-promyelocytic-leukemia-cell-hl-60-autophagic-apoptosis
#4
Y-H Zhang, Q-F Lin, X-L Wang, Q-Y Li, J-J Chai, X-J Fan
OBJECTIVE: We aimed at investigating the effects of rapamycin on apoptosis and autophagy of human acute promyelocytic leukemia cell line HL-60, and to preliminarily explore the mechanism of extra medullary infiltration of leukemia cells with human acute promyelocytic leukemia cell line HL-60 as the object of study, providing a theoretical basis for the clinical treatment of leukemia. MATERIALS AND METHODS: After HL-60 cells were cultured in vitro, the effect of rapamycin on proliferation ability of HL-60 cells was determined by methyl thiazolyl tetrazolium (MTT) method, the cell apoptosis ratio was detected by flow cytometer, the change of autophagy after HL-60 cells acted by rapamycin was tested by monodansylcadaverine (MDC) fluorescence staining, the mRNA expression of autophagy-related molecule was detected by polymerase chain reaction (PCR), and the expressions of apoptosis-related protein and autophagy-related protein were determined by Western blotting (WB)...
December 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29243791/mir-181a-mediates-ang-ii-induced-myocardial-hypertrophy-by-mediating-autophagy
#5
A-L Li, J-B Lv, L Gao
OBJECTIVE: To investigate the relationship between miR-181a and cardiac hypertrophy and autophagy in rats with myocardial hypertrophy, and whether miR-181a regulates the autophagy through ATG5, thereby participating in the occurrence and development of myocardial hypertrophy. MATERIALS AND METHODS: The rat model of myocardial hypertrophy was established via the abdominal aortic coarctation. The expression of miR-181a in cardiac tissues was detected via reverse transcription-polymerase chain reaction (RT-PCR)...
December 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29243575/nanomedicine-strategies-for-sustained-controlled-and-targeted-treatment-of-alzheimer-s-disease
#6
Tian-Jun Ma, Jie Gao, Yan Liu, Jian-Hua Zhuang, Chuan Yin, Peng Li, Lei Mao, Jin Xu, Yi-Xin Xu, Yan-Peng Li, Zhong-Xin Zhao, You Yin
Background Alzheimer's disease (AD) is one of the most devastating diseases worldwide. The current drugs for AD can only ameliorate the symptoms rather than reverse or prevent the progress of AD. On the other hand, blood-brain barrier (BBB), as a natural barrier, significantly impedes drug delivery from the blood circulation into the brain. Nanomedicine can be a safe, effective and promising approach to treat AD. Objective This review summarizes the recent nanomedicine research in this area, including the use of liposomes and nanoparticles (NPs), to provide new approach for targeted treatment of AD...
December 15, 2017: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/29243515/alkaloids-from-juglans-mandshurica-maxim-induce-distinctive-cell-death-in-hepatocellular-carcinoma-cells
#7
Li-Li Lou, Zhuo-Yang Cheng, Rui Guo, Guo-Dong Yao, Shao-Jiang Song
The aim of this work was to further investigate the anticancer potential of Juglans mandshurica Maxim, including the separation of active constituents and their anti-proliferative effects with underlying mechanism of action. Five alkaloids (1-5) were isolated from the bark of J. mandshurica. Among them, 1 showed the highest cytotoxic activities against Hep3B and HepG2 cells with an IC50 values of 61.80 and 56.24 μM, respectively. Therefore, the cellular mechanism involved 1 was subsequently studied. Our results showed that 1 markedly caused apoptosis and autophagy, but without cell cycle arrest in HepG2 cells...
December 15, 2017: Natural Product Research
https://www.readbyqxmd.com/read/29243450/pathogenesis-of-age-related-macular-degeneration-dialogue-between-autophagy-and-inflammasomes
#8
Niko Kivinen, Ali Koskela, Anu Kauppinen, Kai Kaarniranta
Age-related macular degeneration is a condition affecting central vision, and is the leading cause of blindness and visual impairment in the western countries. For a long time, inflammation has been associated with the pathogenesis of the condition, and according to current knowledge, inflammation in the retinal pigment epithelial cells (RPE) results from an impairment of intracellular cleansing systems. In combination with the degeneration of RPE cells, this eventually leads to the destruction of light-sensing cells...
2017: Duodecim; Lääketieteellinen Aikakauskirja
https://www.readbyqxmd.com/read/29243082/dihydroquercetin-ameliorated-acetaminophen-induced-hepatic-cytotoxicity-via-activating-jak2-stat3-pathway-and-autophagy
#9
Wenjing Zai, Wei Chen, Jingyun Luan, Jiajun Fan, Xuyao Zhang, Zimei Wu, Tao Ding, Dianwen Ju, Hongrui Liu
Acetaminophen (APAP) overdose is currently the leading cause of acute liver disease, but therapeutic treatment strategies are commonly limited. Although dihydroquercetin (DHQ) is an attractive botanical antioxidant, its protective potential for liver disease remains elusive. The present study investigated the protective effects of DHQ against APAP-induced hepatic cytotoxicity. Primary mouse hepatocytes were treated with different concentrations of DHQ followed by APAP administration. Our data showed that DHQ relieved APAP-induced growth inhibition and lactate dehydrogenase (LDH) release in a dose-dependent manner, as well as inhibited APAP-induced necrosis and extracellular signal regulated kinase-c-Jun-N-terminal kinase (ERK-JNK) stress...
December 14, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29243061/neuroprotective-effect-of-curcumin-against-cerebral-ischemia-reperfusion-via-mediating-autophagy-and-inflammation
#10
Lifa Huang, Chengwei Chen, Xin Zhang, Xu Li, Zupeng Chen, Chao Yang, Xiaolong Liang, Guochong Zhu, Zhen Xu
Curcumin, a polyphenolic compound extracted from Curcuma longa, has drawn attention for its effective bioactivities against ischemia-induced injury. This study aimed to evaluate the neuroprotective effect of curcumin and investigate the underlying mechanism that mediates autophagy and inflammation in an animal model of middle cerebral artery occlusion (MCAO) in rats. Curcumin was delivered to Sprague Dawley male rats at a dose of 200 mg/kg curcumin by intraperitoneal injection 30 min after ischemia-reperfusion (I/R)...
December 15, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/29242632/quantitative-assessment-of-cell-fate-decision-between-autophagy-and-apoptosis
#11
Bing Liu, Zoltán N Oltvai, Hülya Bayır, Gary A Silverman, Stephen C Pak, David H Perlmutter, Ivet Bahar
Autophagy and apoptosis are cellular processes that regulate cell survival and death, the former by eliminating dysfunctional components in the cell, the latter by programmed cell death. Stress signals can induce either process, and it is unclear how cells 'assess' cellular damage and make a 'life' or 'death' decision upon activating autophagy or apoptosis. A computational model of coupled apoptosis and autophagy is built here to analyze the underlying signaling and regulatory network dynamics. The model explains the experimentally observed differential deployment of autophagy and apoptosis in response to various stress signals...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29242539/atad3a-suppresses-pink1-dependent-mitophagy-to-maintain-homeostasis-of-hematopoietic-progenitor-cells
#12
Guoxiang Jin, Chuan Xu, Xian Zhang, Jie Long, Abdol Hossein Rezaeian, Chunfang Liu, Mark E Furth, Steven Kridel, Boris Pasche, Xiu-Wu Bian, Hui-Kuan Lin
Although deletion of certain autophagy-related genes has been associated with defects in hematopoiesis, it remains unclear whether hyperactivated mitophagy affects the maintenance and differentiation of hematopoietic stem cells (HSCs) and committed progenitor cells. Here we report that targeted deletion of the gene encoding the AAA+-ATPase Atad3a hyperactivated mitophagy in mouse hematopoietic cells. Affected mice showed reduced survival, severely decreased bone-marrow cellularity, erythroid anemia and B cell lymphopenia...
January 2018: Nature Immunology
https://www.readbyqxmd.com/read/29242534/the-celecoxib-derivatives-ar-12-and-ar-14-induce-autophagy-and-clear-prion-infected-cells-from-prions
#13
Basant A Abdulrahman, Dalia Abdelaziz, Simrika Thapa, Li Lu, Shubha Jain, Sabine Gilch, Stefan Proniuk, Alexander Zukiwski, Hermann M Schatzl
Prion diseases are fatal infectious neurodegenerative disorders that affect both humans and animals. The autocatalytic conversion of the cellular prion protein (PrPC) into the pathologic isoform PrPSc is a key feature in prion pathogenesis. AR-12 is an IND-approved derivative of celecoxib that demonstrated preclinical activity against several microbial diseases. Recently, AR-12 has been shown to facilitate clearance of misfolded proteins. The latter proposes AR-12 to be a potential therapeutic agent for neurodegenerative disorders...
December 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29242405/digitalis-like-compounds-restore-hnis-expression-and-iodide-uptake-capacity-in-anaplastic-thyroid-cancer
#14
Marika H Tesselaar, Thomas Crezee, Imke Schuurmans, Danny Gerrits, James Nagarajah, Otto C Boerman, Ilse van Engen-van Grunsven, Johannes W A Smit, Romana T Netea-Maier, Theo S Plantinga
Purpose: Anaplastic thyroid cancer (ATC) is a rare malignancy that accounts for 1-2% of all thyroid cancers. ATC is one of the most aggressive human cancers, with rapid growth, tumor invasion and development of distant metastases. The median survival is only 5 months and the 1-year survival is less than 20%. Moreover, as a result of severe dedifferentiation including the loss of human sodium iodide symporter (hNIS) expression, radioactive iodide (RAI) therapy is ineffective. Recently, we have demonstrated beneficial effects of autophagy activating digitalis-like compounds (DLCs) on redifferentiation and concomitant restoration of iodide uptake in RAI-refractory papillary and follicular thyroid cancer cell lines...
December 14, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29242033/the-evidence-and-rationale-for-the-perioperative-use-of-loop-diuretics-during-kidney-transplantation-a-comprehensive-review
#15
REVIEW
Shaifali Sandal, Pannya Bansal, Marcelo Cantarovich
PURPOSE: Loop diuretics (LD) attenuate ischemic injury in nephrons. They are thought to decrease delayed graft function (DGF) during kidney transplantation (KT). This review aimed to summarize the current evidence for the perioperative use of LD during KT. METHODS: We performed an analysis of all articles that were published since the inception of Medline and Embase: 26 studies were selected for inclusion. Scope was LD use during the perioperative phase of KT only...
November 23, 2017: Transplantation Reviews
https://www.readbyqxmd.com/read/29241738/expression-of-autophagy-related-markers-at-the-surgical-margin-of-oral-squamous-cell-carcinoma-correlates-with-poor-prognosis-and-tumor-recurrence
#16
Takehito Terabe, Fumihiko Uchida, Hiroki Nagai, Shoei Omori, Naomi Ishibashi-Kanno, Shogo Hasegawa, Kenji Yamagata, Masahiko Gosho, Toru Yanagawa, Hiroki Bukawa
Oral squamous cell carcinoma (OSCC) is the sixth most common cancer worldwide, and is associated with poor prognosis. Autophagy is a programmed cell survival mechanism involved in physiologic processes and various diseases including cancer. However, the relationship between autophagy and cancer is controversial. Several studies have claimed that the expression of autophagy-related proteins, namely microtubule-associated protein light chain3 (LC3) and p62/SQSTM1 (p62), is associated with poor prognosis in OSCC...
December 11, 2017: Human Pathology
https://www.readbyqxmd.com/read/29241733/autophagy-regulates-high-concentrations-of-iodide-induced-apoptosis-in-sh-sy5y-cells
#17
Bin Zhang, Yushan Cui, Lingzhi Wang, Liang Zhao, Changchun Hou, Qiang Zeng, Zushan Zhang, Jingwen Yu, Yang Zhao, Junyan Nie, Xuemin Chen, Aiguo Wang, Hongliang Liu
To date, there are many people residing in areas with high levels of iodide in water. Our previous epidemiological study showed that exposure to high iodine in drinking water significantly reduced the intelligence of children although the mechanisms remain unclear. To explore whether high concentrations of iodide may cause cytotoxic effect and the role of autophagy in the high iodide-induced apoptosis, human neuroblastoma cells (SH-SY5Y cells) were exposed to high concentrations of iodide. Morphological phenotypes, cell viability, Hoechst 33258 staining, the expression levels of apoptosis and autophagy-related proteins were detected...
December 11, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/29241629/the-expression-of-mirc1-mir17-92-cluster-in-sputum-samples-correlates-with-pulmonary-exacerbations-in-cystic-fibrosis-patients
#18
Kathrin Krause, Benjamin T Kopp, Mia F Tazi, Kyle Caution, Kaitlin Hamilton, Asmaa Badr, Chandra Shrestha, Dmitry Tumin, Don Hayes, Frank Robledo, Luanne Hall-Stoodley, Brett G Klamer, Xiaoli Zhang, Santiago Partida-Sanchez, Narasimham L Parinandi, Stephen E Kirkby, Duaa Dakhlallah, Karen S McCoy, Estelle Cormet-Boyaka, Amal O Amer
INTRODUCTION: Cystic fibrosis (CF) is a multi-organ disorder characterized by chronic sino-pulmonary infections and inflammation. Many patients with CF suffer from repeated pulmonary exacerbations that are predictors of worsened long-term morbidity and mortality. There are no reliable markers that associate with the onset or progression of an exacerbation or pulmonary deterioration. Previously, we found that the Mirc1/Mir17-92a cluster which is comprised of 6 microRNAs (Mirs) is highly expressed in CF mice and negatively regulates autophagy which in turn improves CF transmembrane conductance regulator (CFTR) function...
December 11, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/29241579/punicalagin-from-pomegranate-promotes-human-papillary-thyroid-carcinoma-bcpap-cell-death-by-triggering-atm-mediated-dna-damage-response
#19
Xin Yao, Xian Cheng, Li Zhang, Huixin Yu, Jiandong Bao, Haixia Guan, Rongrong Lu
Punicalagin (PUN), a component derived from pomegranate, is well known for its anticancer activity. Our previous work revealed that PUN induces autophagic cell death in papillary thyroid carcinoma cells. We hypothesized that PUN triggers DNA damage associated with cell death because DNA damage was reported as an inducer of autophagy. Our results showed that PUN treatment caused DNA breaks as evidenced by the significant enhancement in the phosphorylation of H2A.X. However, reactive oxygen species and DNA conformational alteration, 2 common inducing factors in DNA damage, were not involved in PUN-induced DNA damage...
November 2017: Nutrition Research
https://www.readbyqxmd.com/read/29241092/trehalose-protects-against-oxidative-stress-by-regulating-the-keap1-nrf2-and-autophagy-pathways
#20
Yuhei Mizunoe, Masaki Kobayashi, Yuka Sudo, Shukoh Watanabe, Hiromine Yasukawa, Daiki Natori, Ayana Hoshino, Arisa Negishi, Naoyuki Okita, Masaaki Komatsu, Yoshikazu Higami
Dysfunction of autophagy, which regulates cellular homeostasis by degrading organelles and proteins, is associated with pathogenesis of various diseases such as cancer, neurodegeneration and metabolic disease. Trehalose, a naturally occurring nontoxic disaccharide found in plants, insects, microorganisms and invertebrates, but not in mammals, was reported to function as a mechanistic target of the rapamycin (mTOR)-independent inducer of autophagy. In addition, trehalose functions as an antioxidant though its underlying molecular mechanisms remain unclear...
September 20, 2017: Redox Biology
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