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https://www.readbyqxmd.com/read/28944876/nutrient-deprivation-induces-apoptosis-of-nucleus-pulposus-cells-via-activation-of-the-bnip3-aif-signalling-pathway
#1
Jie Liu, Chao Yuan, Luqiao Pu, Jian Wang
Nutrient deprivation (ND)‑induced nucleus pulposus (NP) cell death serves an important role in intervertebral disc degeneration disease. However, the underlying mechanisms have yet to be thoroughly elucidated. The present study created a cell culture model under ND conditions to investigate the roles of the nutrient‑sensitive protein B‑cell lymphoma 2/adenovirus E1B 19 kDa‑interacting protein (BNIP3) and the mitochondrial pro‑death protein apoptosis‑inducing factor (AIF) in the death pathway of NP cells...
September 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28918350/expression-and-functional-characterization-of-the-bnip3-protein-in-renal-cell-carcinomas
#2
Stephan Macher-Goeppinger, Martina Keith, Gencay Hatiboglu, Markus Hohenfellner, Peter Schirmacher, Wilfried Roth, Katrin E Tagscherer
BNIP3 (Bcl-2/adenovirus E1B 19-kDa interacting protein 3) is a BH3-only protein that regulates apoptosis and autophagy. BNIP3 plays also an important role in hypoxia-induced cell response and is regulated by HIF1. Here, we studied a possible association of BNIP3 expression and the prognosis of patients with renal cell carcinomas (RCCs) and examined the functional relevance of BNIP3 in the regulation of cell survival and apoptosis of renal carcinoma cells. BNIP3 expression was determined by immunohistochemistry in RCC tumor tissue samples of 569 patients using a tissue microarray...
September 14, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28899845/upwelling-derived-oceanographic-conditions-impact-growth-performance-and-growth-related-gene-expression-in-intertidal-fish
#3
Eduardo N Fuentes, Rodrigo Zuloaga, Oscar Almarza, Katterinne Mendez, Juan Antonio Valdés, Alfredo Molina, Jose Pulgar
Growth is one of the main biological processes in aquatic organisms that is affected by environmental fluctuations such as upwelling (characterized by food-rich waters). In fish, growth is directly related with skeletal muscle increase; which represents the largest tissue of body mass. However, the effects of upwelling on growth, at the physiological and molecular level, are unknown. This study used Girella laevifrons (one of the most abundant intertidal fish in Eastern South Pacific) as a biological model, considering animals from upwelling (U) and non-upwelling (NU) areas...
September 9, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28890682/impaired-mitophagy-plays-a-role-in-denervation-of-neuromuscular-junctions-in-als-mice
#4
Robert S Rogers, Sudheer Tungtur, Tomohiro Tanaka, Lisa L Nadeau, Yomna Badawi, Hua Wang, Hong-Min Ni, Wen-Xing Ding, Hiroshi Nishimune
Motor neurons in amyotrophic lateral sclerosis (ALS) patients and animal models show degeneration from the nerve terminal, known as dying-back neuropathy. To investigate the mechanism underlying this neuropathy, we analyzed the neuromuscular junctions (NMJs) and motor neuron cell bodies in SOD1(G93A) mice using electron microscopy. NMJs of SOD1(G93A) mice exhibited significantly higher numbers of autophagosomes and degenerated mitochondria compared to wild-type controls. Mitophagosomes were identified in the NMJ presynaptic terminals of wild-type mice and SOD1(G93A) mice...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28881481/oxaliplatin-induces-muscle-loss-and-muscle-specific-molecular-changes-in-mice
#5
Claire E Feather, Justin G Lees, Preet G S Makker, David Goldstein, John B Kwok, Gila Moalem-Taylor, Patsie Polly
INTRODUCTION: Muscle wasting is a frequent, debilitating complication of cancer. The impact of colorectal cancer chemotherapeutic oxaliplatin on the development of muscle loss and associated molecular changes is of clinical importance. METHODS: C57BL/6J male mice were treated with oxaliplatin. Total body weights were measured and behavioral studies performed. Hindlimb muscle weights (gastrocnemius and soleus) were recorded in conjunction with gene and protein expression analysis...
September 7, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28869833/yap-promotes-hepatocellular-carcinoma-metastasis-and-mobilization-via-governing-cofilin-f-actin-lamellipodium-axis-by-regulation-of-jnk-bnip3-serca-camkii-pathways
#6
Chen Shi, Yong Cai, Yongheng Li, Ye Li, Nan Hu, Sai Ma, Shunying Hu, Pingjun Zhu, Weihu Wang, Hao Zhou
Despite the increasingly important role of Hippo-Yap in hepatocellular carcinoma (HCC) development and progression, little insight is available at the time regarding the specifics interaction of Yap and cancer cells migration. Here, we identified the mechanism by which tumor-intrinsic Yap deletion resulted in HCC migratory inhibition. Yap was greatly upregulated in HCC and its expression promoted the cells migration. Functional studies found that knockdown of Yap induced JNK phosphorylation which closely bound to the Bnip3 promoter and contributed to Bnip3 expression...
August 24, 2017: Redox Biology
https://www.readbyqxmd.com/read/28859361/bnip3-induces-apoptosis-and-protective-autophagy-under-hypoxia-in-esophageal-squamous-cell-carcinoma-cell-lines-bnip3-regulates-cell-death
#7
Z Ma, C Chen, P Tang, H Zhang, J Yue, Z Yu
Bcl-2/adenovirus E1B 19-kDa interacting protein (BNIP3), a pro-apoptosis protein regulated by the methylation status of its promoter, has been implicated in inducing autophagy. However, the roles of BNIP3 and BNIP3-induced autophagy under hypoxia remain uncertain in esophageal squamous cell carcinoma (ESCC). Two esophageal squamous cancer cell lines, CAES17 and KYSE140, were selected on the basis of the expression and methylation status of BNIP3 to investigate the features of BNIP3 under hypoxia. Hypoxia increased cell death and the expression of BNIP3, whose promoter status was lower methylation, in a time-dependent manner...
September 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28845591/mitochondrial-degeneration-precedes-the-development-of-muscle-atrophy-in-progression-of-cancer-cachexia-in-tumour-bearing-mice
#8
Jacob L Brown, Megan E Rosa-Caldwell, David E Lee, Thomas A Blackwell, Lemuel A Brown, Richard A Perry, Wesley S Haynie, Justin P Hardee, James A Carson, Michael P Wiggs, Tyrone A Washington, Nicholas P Greene
BACKGROUND: Cancer cachexia is largely irreversible, at least via nutritional means, and responsible for 20-40% of cancer-related deaths. Therefore, preventive measures are of primary importance; however, little is known about muscle perturbations prior to onset of cachexia. Cancer cachexia is associated with mitochondrial degeneration; yet, it remains to be determined if mitochondrial degeneration precedes muscle wasting in cancer cachexia. Therefore, our purpose was to determine if mitochondrial degeneration precedes cancer-induced muscle wasting in tumour-bearing mice...
August 28, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/28838842/ellagic-acid-antagonizes-bnip3-mediated-mitochondrial-injury-and-necrotic-cell-death-of-cardiac-myocytes
#9
Abhinav Dhingra, Rahul Jayas, Pegah Afshar, Matthew Guberman, Graham Maddaford, Johnathan Gerstein, Brooke Lieberman, Hilary Nepon, Victoria Margulets, Rimpy Dhingra, Lorrie A Kirshenbaum
The Bcl-2 protein Bnip3 is crucial for provoking oxidative injury to mitochondria following anthracycline treatment or ischemia-reperfusion injury. Herein, we investigate the effects of the polyphenolic compound ellagic acid (EA) on Bnip3 mediated mitochondrial injury and necrotic cell death in cardiac myocytes. In contrast to vehicle treated cardiomyocytes, Bnip3 was highly enriched in mitochondrial fractions of cardiac myocytes treated with the anthracycline doxorubicin or in cells subjected to hypoxia (HPX)...
August 25, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28821609/insulin-like-growth-factor-1-signalling-is-essential-for-mitochondrial-biogenesis-and-mitophagy-in-cancer-cells
#10
Amy Lyons, Michael Coleman, Sarah Riis, Cedric Favre, Ciara H O'Flanagan, Alexander V Zhdanov, Dmitri B Papkovsky, Stephen D Hursting, Rosemary O'Connor
Mitochondrial activity and metabolic reprogramming influence the phenotype of cancer cells and resistance to targeted therapy. We previously established that an Insulin-like Growth Factor 1 (IGF-1)-inducible mitochondrial UTP carrier (PNC1/SLC25A33) promotes cell growth. This prompted us to investigate whether IGF signaling is essential for mitochondrial maintenance in cancer cells, and whether this contributes to therapy resistance. Here, we show that IGF-1 stimulates mitochondrial biogenesis in a range of cell lines...
August 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28819333/expression-of-autophagy-related-proteins-in-h%C3%A3-rthle-cell-neoplasm-is-different-from-that-in-follicular-neoplasm
#11
Yoon Jin Cha, Hye Min Kim, Ja Seung Koo
PURPOSE: We aimed to evaluate expression of autophagy-related proteins in Hürthle cell neoplasm (HCN) and follicular neoplasm (FN) and assess the clinical implications. METHODS: 265 FNs (112 follicular carcinomas and 153 follicular adenomas) and 108 HCNs (27 Hürthle cell carcinomas and 81 Hürthle cell adenomas) were made into a tissue microarray. Immunohistochemical staining and Western blot for autophagy-related proteins (beclin-1, light chain (LC) 3A, LC3B, p62, and BNIP3) were performed, and the results were statistically analyzed...
2017: Disease Markers
https://www.readbyqxmd.com/read/28817115/administration-of-follicle-stimulating-hormone-induces-autophagy-via-upregulation-of-hif-1%C3%AE-in-mouse-granulosa-cells
#12
Jilong Zhou, Wang Yao, Chengyu Li, Wangjun Wu, Qifa Li, Honglin Liu
Recent studies reported the important role of autophagy in follicular development. However, the underlying molecular mechanisms remain elusive. In this study, we investigated the effect of follicle-stimulating hormone (FSH) on mouse granulosa cells (MGCs). Results indicated that autophagy was induced by FSH, which is known to be the dominant hormone regulating follicular development and granulosa cell (GC) proliferation. The activation of mammalian target of rapamycin (mTOR), a master regulator of autophagy, was inhibited during the process of MGC autophagy...
August 17, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28810549/dexmedetomidine-preconditioning-protects-against-lung-injury-induced-by-ischemia-reperfusion-through-inhibition-of-autophagy
#13
Wei Zhang, Jiaqiang Zhang
The present study aimed to evaluate the role of autophagy in the protective effect of dexmedetomidine in lung injury caused by ischemia-reperfusion (IR) in rats. In total 48 adult male Sprague-Dawley rats were randomly divided into 6 groups (n=8) as follows: i) Sham group; ii) the IR group; iii) IR + 1 µg/kg dexmedetomidine preconditioning group (pre-LD); iv) IR + 10 µg/kg dexmedetomidine preconditioning group (pre-HD); v) IR + 1 µg/kg dexmedetomidine postconditioning group (post-LD); and vi) IR + 10 µg/kg dexmedetomidine postconditioning group (post-HD)...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28808415/foxo-signaling-pathways-as-therapeutic-targets-in-cancer
#14
REVIEW
Mohd Farhan, Haitao Wang, Uma Gaur, Peter J Little, Jiangping Xu, Wenhua Zheng
Many transcription factors play a key role in cellular differentiation and the delineation of cell phenotype. Transcription factors are regulated by phosphorylation, ubiquitination, acetylation/deacetylation and interactions between two or more proteins controlling multiple signaling pathways. These pathways regulate different physiological processes and pathological events, such as cancer and other diseases. The Forkhead box O (FOXO) is one subfamily of the fork head transcription factor family with important roles in cell fate decisions and this subfamily is also suggested to play a pivotal functional role as a tumor suppressor in a wide range of cancers...
2017: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/28804553/sirt3-attenuates-doxorubicin-induced-cardiac-hypertrophy-and-mitochondrial-dysfunction-via-suppression-of-bnip3
#15
Qiong Du, Bin Zhu, Qing Zhai, Bo Yu
Doxorubicin (Dox) is an anthracycline antibiotic widely used in cancer treatment. Although its antitumor efficacy appears to be dose dependent, its clinical use is greatly restricted by development of cardiotoxicity. Sirtuin-3 (Sirt3) is the major deacetylase within the mitochondrial matrix that plays an important role in regulation of cardiac function. This study was performed to identify the regulatory role of Sirt3 on Dox-induced cardiac hypertrophy and mitochondrial dysfunction in rats in vivo and in vitro...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28798696/phylogenetic-and-molecular-evolutionary-analysis-of-mitophagy-receptors-under-hypoxic-conditions
#16
Xiaomei Wu, Fei-Hua Wu, Qianrong Wu, Shu Zhang, Suping Chen, Matthew Sima
As animals evolved to use oxygen as the main strategy to produce ATP through the process of mitochondrial oxidative phosphorylation, the ability to adapt to fluctuating oxygen concentrations is a crucial component of evolutionary pressure. Three mitophagy receptors, FUNDC1, BNIP3 and NIX, induce the removal of dysfunctional mitochondria (mitophagy) under prolonged hypoxic conditions in mammalian cells, to maintain oxygen homeostasis and prevent cell death. However, the evolutionary origins and structure-function relationships of these receptors remain poorly understood...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28758420/mir-377-reverses-cancerous-phenotypes-of-pancreatic-cells-via-suppressing-dnmt1-and-demethylating-tumor-suppressor-genes
#17
Masoumeh Azizi, Pezhman Fard-Esfahani, Habibollah Mahmoodzadeh, Mohammad Sadegh Fazeli, Kayhan Azadmanesh, Sirous Zeinali, Ladan Teimoori-Toolabi
AIM: The aim was to investigate the effect of miR-377 on DNMT1 expression and cancer phenotype in pancreatic cancer cells. MATERIALS & METHODS: Real-time PCR, luciferase assay, MTT and Annexin-PI staining were used. RESULTS: Decreased miR-377 and increased DNMT1 (verified as a target for mir-377) levels in pancreatic cancer tissues and cell lines in comparison with normal tissues was confirmed to be influenced by promoter methylation. Also hypermethylation of BNIP3, SPARC, TFPI2 and PENK promoters was observed in tumor samples but not in normal tissues which negatively correlated with their expression...
July 31, 2017: Epigenomics
https://www.readbyqxmd.com/read/28754633/hyperoside-protects-against-hypoxia-reoxygenation-induced-injury-in-cardiomyocytes-by-suppressing-the-bnip3-expression
#18
Rui Xiao, An-Li Xiang, Hong-Bo Pang, Ke-Qiang Liu
AIMS: Role of hyperoside in protecting cardiomyocytes from ischemia/reperfusion induced injury has been proved. However, possible protecting mechanisms remain unclear. To fix the problem, an essential pro-apoptotic protein Bnip3 was studied in our experiments. METHODS AND RESULTS: Neonatal rat cardiomyocytes were used and submitted to hypoxia for 8h followed by reoxygenation for 2h to simulate the ischemia/reperfusion injury. Hypoxia/reoxygenation(H/R) induced damage to cardiomyocytes and the protective effect of hyperoside were examined by means of MTT assay...
September 20, 2017: Gene
https://www.readbyqxmd.com/read/28706950/effects-of-cobalt-chloride-a-hypoxia-mimetic-agent-on-autophagy-and-atrophy-in-skeletal-c2c12-myotubes
#19
Rui Chen, Ting Jiang, Yanling She, Jiehua Xu, Cheng Li, Shanyao Zhou, Huijuan Shen, Huacai Shi, Shuang Liu
BACKGROUND: Hypoxia-induced autophagy and muscle wasting occur in several environmental and pathological conditions. However, the molecular mechanisms underlying the effects of the hypoxia-mimetic agent CoCl2 on autophagy and muscle atrophy are still unclear. METHODS: C2C12 myotubes were exposed to increasing concentrations of CoCl2 for 24 hours. Quantitative RT-PCR, Western blotting, and transmission electron microscopy were performed to confirm autophagy occurs...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28705993/effects-of-%C3%AE-hydroxy-%C3%AE-methylbutyrate-hmb-on-skeletal-muscle-mitochondrial-content-and-dynamics-and-lipids-after-10-days-of-bed-rest-in-older-adults
#20
Robert A Standley, Giovanna Distefano, Suzette L Pereira, Min Tian, Owen J Kelly, Paul M Coen, Nicolaas E P Deutz, Robert R Wolfe, Bret H Goodpaster
Loss of muscle mass during periods of disuse likely has negative health consequences for older adults. We have previously shown that β-hydroxy-β-methylbutyrate (HMB) supplementation during 10 days of strict bed rest (BR) attenuates the loss of lean mass in older adults. To elucidate potential molecular mechanisms of HMB effects on muscle during bed rest and resistance training rehabilitation (RT), we examined mediators of skeletal muscle mitochondrial dynamics, autophagy and atrophy, and intramyocellular lipids...
July 13, 2017: Journal of Applied Physiology
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