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https://www.readbyqxmd.com/read/29053994/dietary-resveratrol-confers-apoptotic-resistance-to-oxidative-stress-in-myoblasts
#1
Satoshi Haramizu, Shinichi Asano, David C Butler, David A Stanton, Ameena Hajira, Junaith S Mohamed, Stephen E Alway
High levels of reactive oxygen species (ROS) contribute to muscle cell death in aging and disuse. We have previously found that resveratrol can reduce oxidative stress in response to aging and hindlimb unloading in rodents in vivo, but it was not known if resveratrol would protect muscle stem cells during repair or regeneration when oxidative stress is high. To test the protective role of resveratrol on muscle stem cells directly, we treated the C2C12 mouse myoblast cell line with moderate (100 μM) or very high (1 mM) levels of H2O2 in the presence or absence of resveratrol...
August 24, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29053904/a-direct-aspiration-first-pass-technique-adapt-for-acute-stroke-therapy-a-systematic-review-and-meta-analysis
#2
Benjamin Gory, Xavier Armoiry, Rotem Sivan-Hoffman, Michel Piotin, Mikael Mazighi, Bertrand Lapergue, Raphaël Blanc, Francis Turjman
BACKGROUND AND PURPOSE: ADAPT (A Direct Aspiration First Pass Technique), involving the first-line use of large-bore distal aspiration catheter, is a new strategy in the mechanical thrombectomy of acute ischemic stroke caused by large vessel occlusion. However, its impact on reperfusion rates, clinical outcomes, and complication rates is not fully examined. METHOD: We conducted a systematic review of the literature searching multiple databases for reports on thrombectomy of acute stroke with the ADAPT technique and performed meta-analyses of clinical and radiographic outcomes...
October 20, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29053833/clinical-pathological-and-functional-characterization-of-riboflavin-responsive-neuropathy
#3
Andreea Manole, Zane Jaunmuktane, Iain Hargreaves, Marthe H R Ludtmann, Vincenzo Salpietro, Oscar D Bello, Simon Pope, Amelie Pandraud, Alejandro Horga, Renata S Scalco, Abi Li, Balasubramaniem Ashokkumar, Charles M Lourenço, Simon Heales, Rita Horvath, Patrick F Chinnery, Camilo Toro, Andrew B Singleton, Thomas S Jacques, Andrey Y Abramov, Francesco Muntoni, Michael G Hanna, Mary M Reilly, Tamas Revesz, Dimitri M Kullmann, James E C Jepson, Henry Houlden
Brown-Vialetto-Van Laere syndrome represents a phenotypic spectrum of motor, sensory, and cranial nerve neuropathy, often with ataxia, optic atrophy and respiratory problems leading to ventilator-dependence. Loss-of-function mutations in two riboflavin transporter genes, SLC52A2 and SLC52A3, have recently been linked to Brown-Vialetto-Van Laere syndrome. However, the genetic frequency, neuropathology and downstream consequences of riboflavin transporter mutations are unclear. By screening a large cohort of 132 patients with early-onset severe sensory, motor and cranial nerve neuropathy we confirmed the strong genetic link between riboflavin transporter mutations and Brown-Vialetto-Van Laere syndrome, identifying 22 pathogenic mutations in SLC52A2 and SLC52A3, 14 of which were novel...
September 26, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29053824/chemogenetic-locus-coeruleus-activation-restores-reversal-learning-in-a-rat-model-of-alzheimer-s-disease
#4
Jacki M Rorabaugh, Termpanit Chalermpalanupap, Christian A Botz-Zapp, Vanessa M Fu, Natalie A Lembeck, Robert M Cohen, David Weinshenker
Clinical evidence suggests that aberrant tau accumulation in the locus coeruleus and noradrenergic dysfunction may be a critical early step in Alzheimer's disease progression. Yet, an accurate preclinical model of these phenotypes that includes early pretangle tau accrual in the locus coeruleus, loss of locus coeruleus innervation and deficits locus coeruleus/norepinephrine modulated behaviours, does not exist, hampering the identification of underlying mechanisms and the development of locus coeruleus-based therapies...
September 25, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29053747/establishment-of-pten-knockout-medaka-with-transcription-activator-like-effector-nucleases-talens-as-a-model-of-pten-deficiency-disease
#5
Yuriko Matsuzaki, Tetsushi Sakuma, Takashi Yamamoto, Hideyuki Saya
Phosphatase and tensin homolog (PTEN) is a lipid and protein phosphatase that antagonizes signaling by the phosphatidylinositol 3-kinase (PI3K)-AKT signaling pathway. The PTEN gene is a major tumor suppressor, with mutations of this gene occurring frequently in tumors of humans and mice. We have now developed mutant medaka deficient in PTEN with the use of transcription activator-like effector nuclease (TALEN) technology. Medaka possesses two pten genes, ptena and ptenb, similar to zebrafish. We established 16 ptena mutant lines and two ptenb mutant lines...
2017: PloS One
https://www.readbyqxmd.com/read/29053743/in-vitro-modeling-of-experimental-succinic-semialdehyde-dehydrogenase-deficiency-ssadhd-using-brain-derived-neural-stem-cells
#6
Kara R Vogel, Garrett R Ainslie, Erwin E Jansen, Gajja S Salomons, Jean-Baptiste Roullet, K Michael Gibson
We explored the utility of neural stem cells (NSCs) as an in vitro model for evaluating preclinical therapeutics in succinic semialdehyde dehydrogenase-deficient (SSADHD) mice. NSCs were obtained from aldh5a1+/+ and aldh5a1-/- mice (aldh5a1 = aldehyde dehydrogenase 5a1 = SSADH). Multiple parameters were evaluated including: (1) production of GHB (γ-hydroxybutyrate), the biochemical hallmark of SSADHD; (2) rescue from cell death with the dual mTOR (mechanistic target of rapamycin) inhibitor, XL-765, an agent previously shown to rescue aldh5a1-/- mice from premature lethality; (3) mitochondrial number, total reactive oxygen species, and mitochondrial superoxide production, all previously documented as abnormal in aldh5a1-/- mice; (4) total ATP levels and ATP consumption; and (5) selected gene expression profiles associated with epilepsy, a prominent feature in both experimental and human SSADHD...
2017: PloS One
https://www.readbyqxmd.com/read/29053565/a-synthetic-analogue-of-neopeltolide-8-9-dehydroneopeltolide-is-a-potent-anti-austerity-agent-against-starved-tumor-cells
#7
Haruhiko Fuwa, Mizuho Sato
Neopeltolide, an antiproliferative marine macrolide, is known to specifically inhibit complex III of the mitochondrial electron transport chain (mETC). However, details of the biological mode-of-action(s) remain largely unknown. This work demonstrates potent cytotoxic activity of synthetic neopeltolide analogue, 8,9-dehydroneopeltolide (8,9-DNP), against starved human pancreatic adenocarcinoma PANC-1 cells and human non-small cell lung adenocarcinoma A549 cells. 8,9-DNP induced rapid dissipation of the mitochondrial membrane potential and depletion of intracellular ATP level in nutrient-deprived medium...
October 20, 2017: Marine Drugs
https://www.readbyqxmd.com/read/29052994/force-induced-calpain-cleavage-of-talin-is-critical-for-growth-adhesion-development-and-rigidity-sensing
#8
Mayur Saxena, Rishita Changede, James C Hone, Haguy Wolfenson, Michael P Sheetz
Cell growth depends upon formation of cell-matrix adhesions, but mechanisms detailing the transmission of signals from adhesions to control proliferation are still lacking. Here, we find that the scaffold protein talin undergoes force-induced cleavage in early adhesions to produce the talin rod fragment that is needed for cell cycle progression. Expression of non-cleavable talin blocks cell growth, adhesion maturation, proper mechanosensing, and the related property of EGF activation of motility. Further, the expression of talin rod in the presence of non-cleavable full-length talin rescues cell growth and other functions...
October 20, 2017: Nano Letters
https://www.readbyqxmd.com/read/29052915/disease-burden-of-mild-asthma-in-china
#9
Bo Ding, Mark Small
BACKGROUND AND OBJECTIVE: The impact, treatment patterns and control of mild asthma are poorly understood for Chinese patients. This study describes the characteristics, therapeutic interventions and burden of mild asthma on patients residing in major cities of China. METHODS: The Respiratory Disease Specific Program 2015, a cross-sectional survey, was conducted with Chinese physicians and their patients. The survey assessed clinical characteristics, asthma symptoms, exacerbations, rescue inhaler usage, treatment adherence, asthma control, work and activity impairments and healthcare utilization for patients prescribed Global Initiative for Asthma (GINA) Step 1 or 2 treatment defined mild asthma...
October 20, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/29052350/platelet-lysate-activates-quiescent-cell-proliferation-and-reprogramming-in-human-articular-cartilage-involvement-of-hypoxia-inducible-factor-1
#10
Van Thi Nguyen, Ranieri Cancedda, Fiorella Descalzi
The idea of rescuing the body self-repair capability lost during evolution is progressively gaining ground in Regenerative Medicine. In particular, growth factors and bioactive molecules derived from activated platelets emerged as promising therapeutic agents acting as trigger for repair of tissue lesions and restoration of tissue functions. Aim of this study was to assess the potential of a Platelet Lysate (PL) for human articular cartilage repair considering its activity on progenitor cells and differentiated chondrocytes...
October 19, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29052315/identification-and-evolution-of-latrophilin-receptor-gene-involved-in-tribolium-castaneum-devolopment-and-female-fecundity
#11
Shanshan Gao, Xing Liu, Juanjuan Liu, Wenfeng Xiong, Xiaowen Song, Wu Wei, Luting Wei, Bin Li
Latrophilins (LPHs) are adhesion G-protein-coupled receptors comprising three paralogous forms (LPH-1, LPH-2 and LPH-3) and known receptors for α-latrotoxin, which are involved in growth, development, adaptability and schizophrenia and other diseases in vertebrates. However, the functions of LPH are poorly understood in most insects. Here, phylogenetic and synteny analysis indicated that LPH-1 and LPH-3 evolved separately from a common ancestor LPH-2. Then, latrophilin (Tclph) was cloned in Tribolium castaneum, and three alternatively spliced transcripts (Tclpha, Tclphb and Tclphc) were identified...
October 20, 2017: Genesis: the Journal of Genetics and Development
https://www.readbyqxmd.com/read/29052021/a-new-approach-to-predict-user-mobility-using-semantic-analysis-and-machine-learning
#12
Roshan Fernandes, Rio D'Souza G L
Mobility prediction is a technique in which the future location of a user is identified in a given network. Mobility prediction provides solutions to many day-to-day life problems. It helps in seamless handovers in wireless networks to provide better location based services and to recalculate paths in Mobile Ad hoc Networks (MANET). In the present study, a framework is presented which predicts user mobility in presence and absence of mobility history. Naïve Bayesian classification algorithm and Markov Model are used to predict user future location when user mobility history is available...
October 19, 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/29051972/mir-96-5p-prevents-hepatic-stellate-cell-activation-by-inhibiting-autophagy-via-atg7
#13
Kangkang Yu, Ning Li, Qi Cheng, Jianming Zheng, Mengqi Zhu, Suxia Bao, Mingquan Chen, Guangfeng Shi
Activation of hepatic stellate cell (HSC), which is the main source of extracellular matrix, plays a pivotal role in liver fibrogenesis. Autophagy of hepatic stellate cell has been recently implicated in liver fibrosis, but the regulation of hepatic stellate cell autophagy during this process remains poorly understood. Here, we first identified miR-96-5p as an aberrantly expressed miRNA in fibrotic liver tissues. Next, we transfected miR-96-5p mimic into human hepatic stellate cell line LX-2 and observed decreased protein and mRNA levels of α-SMA and Col1A1...
October 19, 2017: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/29051494/mir-31-promotes-mammary-stem-cell-expansion-and-breast-tumorigenesis-by-suppressing-wnt-signaling-antagonists
#14
Cong Lv, Fengyin Li, Xiang Li, Yuhua Tian, Yue Zhang, Xiaole Sheng, Yongli Song, Qingyong Meng, Shukai Yuan, Liming Luan, Thomas Andl, Xu Feng, Baowei Jiao, Mingang Xu, Maksim V Plikus, Xing Dai, Christopher Lengner, Wei Cui, Fazheng Ren, Jianwei Shuai, Sarah E Millar, Zhengquan Yu
MicroRNA-mediated post-transcriptional regulation plays key roles in stem cell self-renewal and tumorigenesis. However, the in vivo functions of specific microRNAs in controlling mammary stem cell (MaSC) activity and breast cancer formation remain poorly understood. Here we show that miR-31 is highly expressed in MaSC-enriched mammary basal cell population and in mammary tumors, and is regulated by NF-κB signaling. We demonstrate that miR-31 promotes mammary epithelial proliferation and MaSC expansion at the expense of differentiation in vivo...
October 19, 2017: Nature Communications
https://www.readbyqxmd.com/read/29051371/adrenergic-nerves-activate-an-angio-metabolic-switch-in-prostate-cancer
#15
Ali H Zahalka, Anna Arnal-Estapé, Maria Maryanovich, Fumio Nakahara, Cristian D Cruz, Lydia W S Finley, Paul S Frenette
Nerves closely associate with blood vessels and help to pattern the vasculature during development. Recent work suggests that newly formed nerve fibers may regulate the tumor microenvironment, but their exact functions are unclear. Studying mouse models of prostate cancer, we show that endothelial β-adrenergic receptor signaling via adrenergic nerve-derived noradrenaline in the prostate stroma is critical for activation of an angiogenic switch that fuels exponential tumor growth. Mechanistically, this occurs through alteration of endothelial cell metabolism...
October 20, 2017: Science
https://www.readbyqxmd.com/read/29051340/attenuation-of-myeloid-specific-tgf%C3%AE-signaling-induces-inflammatory-cerebrovascular-disease-and-stroke
#16
M C Hollander, Lawrence L Latour, Dan Yang, Hiroki Ishii, Zhiguang Xiao, Yongfen Min, Abhik Ray-Choudhury, Jeeva Munasinghe, Anand S Merchant, P C Lin, John Hallenbeck, Manfred Boehm, Li Yang
Rationale: Cryptogenic strokes, those of unknown cause, have been estimated as high as 30-40% of strokes. Inflammation has been suggested as a critical etiological factor. However, there is lack of experimental evidence. Objective: In this study, we investigated inflammation associated stroke etiology using a mouse model that developed spontaneous stroke due to myeloid deficiency of TGFβ signaling. Methods and Results: We report that mice with deletion of Tgfbr2 in myeloid cells (Tgfbr2(Myeko)) developed cerebrovascular inflammation in the absence of significant pathology in other tissues, culminating in stroke and severe neurological deficits with 100% penetrance...
October 19, 2017: Circulation Research
https://www.readbyqxmd.com/read/29051265/regulation-of-notch-signaling-by-rab7-and-rab8-requires-carboxyl-methylation-by-icmt
#17
Helen Court, Ian M Ahearn, Marc Amoyel, Erika A Bach, Mark R Philips
Isoprenylcysteine carboxyl methyltransferase (ICMT) methylesterifies C-terminal prenylcysteine residues of CaaX proteins and some RAB GTPases. Deficiency of either ICMT or NOTCH1 accelerates pancreatic neoplasia in Pdx1-Cre;LSL-Kras(G12D) mice, suggesting that ICMT is required for NOTCH signaling. We used Drosophila melanogaster wing vein and scutellar bristle development to screen Rab proteins predicted to be substrates for ICMT (ste14 in flies). We identified Rab7 and Rab8 as ICMT substrates that when silenced phenocopy ste14 deficiency...
October 19, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/29050991/mycophenolate-mofetil-in-autoimmune-hepatitis-patients-with-suboptimal-outcomes-to-standard-therapy-the-tapestry-study
#18
Stuart K Roberts, Ricky Lim, Simone Strasser, Amanda Nicoll, Alessia Gazzola, Joanne Mitchell, Way Siow, Tiffany Khoo, Zaki Hamarneh, Martin Weltman, Paul Gow, Natasha Janko, Edmund Tse, Gauri Mishra, En-Hsiang Cheng, Miriam Levy, Wendy Cheng, Siddarth Sood, Richard Skoien, Jonathan Mitchell, Amany Zekry, Jacob George, Gerry MacQuillan, Alan Wigg, Katherine Stuart, William Sievert, Geoffrey McCaughan
BACKGROUND AND AIMS: The outcomes of mycophenolate mofetil (MMF) as rescue therapy for AIH patients who have a suboptimal outcome to standard therapy remain unclear. We evaluated the efficacy and safety of MMF in patients who had failed or were intolerant to corticosteroids with/without azathioprine. METHODS: A retrospective study was performed of AIH patients who received MMF after an inadequate response or intolerance to standard therapy. Patients were recruited from 17 liver clinics via the Australian Liver Association Clinical Research Network...
October 16, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/29050963/long-chain-glucosylceramides-crosstalk-with-lyn-mediates-endometrial-cell-migration
#19
Dulani Wimalachandra, Joan Yang Xiaohui, Lina Zhu, Evan Tan, Harry Asada, Jerry Y K Chan, Yie Hou Lee
Endometriosis is a disease characterized by regurgitated lesions which are invasive and migratory, embedding at ectopic, extra-uterine locations. Extracellular glucosylceramides (GlcCers), bioactive sphingolipids potentiating signals for cell migration, are found in elevated levels in endometriosis; however underlying mechanisms that result in cellular migration are poorly defined. Here, we demonstrated that internalized GlcCer induced migratory activity in immortalized human endometrial stromal cells (HESCs), with highest potency observed in long-chain GlcCer...
October 16, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29050943/mir-67-regulates-p-aeruginosa-avoidance-behavior-in-c-elegans
#20
Yi-Cheng Ma, Lu Zhang, Li-Li Dai, Rahat Ullah Khan, Cheng-Gang Zou
Pathogen avoidance behaviors are found throughout the animal kingdom and are important for animal's survival in nature. As a free-living nematode, C. elegans is exposed to a variety of microorganisms, including toxic or pathogenic bacteria, in soil. C. elegans can develop efficient avoidance responses to pathogenic bacteria to minimize the infection risk. However, the role of microRNAs (miRNAs) in pathogen avoidance in C. elegans remains unclear. In this report, we showed that the miRNA mir-67 was involved in a behavioral avoidance response to P...
October 16, 2017: Biochemical and Biophysical Research Communications
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