keyword
MENU ▼
Read by QxMD icon Read
search

SMA

keyword
https://www.readbyqxmd.com/read/28210189/development-of-a-meso-scale-sma-based-torsion-actuator-for-image-guided-procedures
#1
Jun Sheng, Dheeraj Gandhi, Rao Gullapalli, J Marc Simard, Jaydev P Desai
This paper presents the design, modeling, and control of a meso-scale torsion actuator based on shape memory alloy (SMA) for image-guided surgical procedures. Developing a miniature torsion actuator is challenging, but it opens the possibility of significantly enhancing the robot agility and maneuverability. The proposed torsion actuator is bi-directionally actuated by a pair of antagonistic SMA torsion springs through alternate Joule heating and natural cooling. The torsion actuator is integrated into a surgical robot prototype to demonstrate its working performance in the humid environment under C-Arm CT image guidance...
February 2017: IEEE Transactions on Robotics: a Publication of the IEEE Robotics and Automation Society
https://www.readbyqxmd.com/read/28209809/macrophage-to-myofibroblast-transition-contributes-to-interstitial-fibrosis-in-chronic-renal-allograft-injury
#2
Ying-Ying Wang, Hong Jiang, Jun Pan, Xiao-Ru Huang, Yu-Cheng Wang, Hong-Feng Huang, Ka-Fai To, David J Nikolic-Paterson, Hui-Yao Lan, Jiang-Hua Chen
Interstitial fibrosis is an important contributor to graft loss in chronic renal allograft injury. Inflammatory macrophages are associated with fibrosis in renal allografts, but how these cells contribute to this damaging response is not clearly understood. Here, we investigated the role of macrophage-to-myofibroblast transition in interstitial fibrosis in human and experimental chronic renal allograft injury. In biopsy specimens from patients with active chronic allograft rejection, we identified cells undergoing macrophage-to-myofibroblast transition by the coexpression of macrophage (CD68) and myofibroblast (α-smooth muscle actin [α-SMA]) markers...
February 16, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28209036/-primary-culture-and-functional-identification-of-distal-pulmonary-artery-smooth-muscle-cells-in-mice
#3
M C Li, Y Q Chen, C T Zhang, Q Jiang, W J Lu, J Wang
Objective: To establish a method of isolation and primary culture of mice distal pulmonary artery smooth muscle cells (PASMCs) and identify the functional properties. Methods: PASMCs were harvested from the distal pulmonary artery (PA) tissue of mice by enzymatic digestion of collagenaseⅠand papain; and the growth characteristics were observed under inverted microscope and identified by Immunofluorescence technique. Effects on the intracellular calcium ion concentration of distal PASMCs were detected by Fura-2-AM fluorescent probe tracer under a fluorescence microscope in Krebs solution containing clopiazonic acid (CPA) and nifedipin (Nif)...
February 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28207886/connective-tissue-growth-factor-is-not-necessary-for-haze-formation-in-excimer-laser-wounded-mouse-corneas
#4
Xiaodi Feng, Liya Pi, Sriniwas Sriram, Gregory S Schultz, Daniel J Gibson
We sought to determine if connective tissue growth factor (CTGF) is necessary for the formation of corneal haze after corneal injury. Mice with post-natal, tamoxifen-induced, knockout of CTGF were subjected to excimer laser phototherapeutic keratectomy (PTK) and the corneas were allowed to heal. The extent of scaring was observed in non-induced mice, heterozygotes, and full homozygous knockout mice and quantified by macrophotography. The eyes from these mice were collected after euthanization for re-genotyping to control for possible Cre-mosaicism...
2017: PloS One
https://www.readbyqxmd.com/read/28207769/role-of-glycogen-synthase-kinase-3%C3%AE-and-ppar-%C3%AE-on-epithelial-to-mesenchymal-transition-in-dss-induced-colorectal-fibrosis
#5
Jacopo Di Gregorio, Roberta Sferra, Silvia Speca, Antonella Vetuschi, Caroline Dubuquoy, Pierre Desreumaux, Simona Pompili, Loredana Cristiano, Eugenio Gaudio, Vincenzo Flati, Giovanni Latella
BACKGROUND: Intestinal fibrosis is characterized by abnormal production and deposition of extracellular matrix (ECM) proteins by activated myofibroblasts. The main progenitor cells of activated myofibroblasts are the fibroblasts and the epithelial cells, the latter through the epithelial-mesenchymal transition (EMT). AIM: To evaluate the action of the new PPAR-γ modulator, GED-0507-34 Levo (GED) on the expression of EMT associated and regulatory proteins such as TGF-β, Smad3, E-cadherin, Snail, ZEB1, β-catenin, and GSK-3β, in a mouse model of DSS-induced intestinal fibrosis...
2017: PloS One
https://www.readbyqxmd.com/read/28204828/tieg1-deficiency-confers-enhanced-myocardial-protection-in-the-infarcted-heart-by-mediating-the-pten-akt-signalling-pathway
#6
Mingqiu Cen, Pengfei Hu, Zhaobin Cai, Tianfu Fang, Jiancheng Zhang, Ming Lu
The transforming growth factor (TGF)-β-inducible early gene-1 (TIEG1) plays a crucial role in modulating cell apoptosis and proliferation in a number of diseases, including pancreatic cancer, leukaemia and osteoporosis. However, the functional role of TIEG1 in the heart has not been fully defined. In this study, we first investigated the role of TIEG1 in ischaemic heart disease. For in vitro experiments, cardiomyocytes were isolated from both TIEG1 knockout (KO) and wile-type (WT) mice, and the apoptotic ratios were evaluated after a 48‑h ischaemic insult...
February 13, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28203261/curcumin-suppresses-intestinal-fibrosis-by-inhibition-of-ppar%C3%AE-mediated-epithelial-mesenchymal-transition
#7
Su Xu, Bin Jiang, Hui Wang, Cunsi Shen, Hao Chen, Li Zeng
Intestinal fibrotic stricture is a major complication of Crohn's disease (CD) and epithelial-to-mesenchymal transition (EMT) is considered as an important contributor to the formation of intestinal fibrosis by increasing extracellular matrix (ECM) proteins. Curcumin, a compound derived from rhizomes of Curcuma, has been demonstrated with a potent antifibrotic effect. However, its effect on intestinal fibrosis and the potential mechanism is not completely understood. Here we found that curcumin pretreatment significantly represses TGF-β1-induced Smad pathway and decreases its downstream α-smooth muscle actin (α-SMA) gene expression in intestinal epithelial cells (IEC-6); in contrast, curcumin increases expression of E-cadherin and peroxisome proliferator-activated receptor γ (PPARγ) in IEC-6...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28203123/spontaneous-isolated-superior-mesenteric-artery-dissection
#8
Anand Nath, Sayali Yewale, Mohammad Kousha
A true isolated superior mesenteric artery (SMA) dissection is a rare occurrence. The increasing use of diagnostic imaging studies has resulted in this rare disease being more recognized. A 68-year-old Caucasian female presented with sharp upper abdominal pain. Computed tomography (CT) of the abdomen showed dissection with thrombosis in the proximal SMA. Conservative management with bowel rest, blood pressure control, and anticoagulation relieved her symptoms. Follow-up CT showed stable dissection. Physicians should consider the diagnosis of isolated spontaneous SMA dissection after excluding more common causes...
September 2016: Case Reports in Gastroenterology
https://www.readbyqxmd.com/read/28202906/bar502-a-dual-fxr-and-gpbar1-agonist-promotes-browning-of-white-adipose-tissue-and-reverses-liver-steatosis-and-fibrosis
#9
Adriana Carino, Sabrina Cipriani, Silvia Marchianò, Michele Biagioli, Chiara Santorelli, Annibale Donini, Angela Zampella, Maria Chiara Monti, Stefano Fiorucci
Non-alcoholic steatohepatitis (NASH) is a highly prevalent chronic liver disease. Here, we have investigated whether BAR502, a non-bile acid, steroidal dual ligand for FXR and GPBAR1, reverses steato-hepatitis in mice fed a high fat diet (HFD) and fructose. After 9 week, mice on HFD gained ≈30% of b.w (P < 0.01 versus naïve) and were insulin resistant. These overweighting and insulin resistant mice were randomized to receive HFD or HFD in combination with BAR502. After 18 weeks, HFD mice developed NASH like features with severe steato-hepatitis and fibrosis, increased hepatic content of triacylglycerol and cholesterol and expression of SREPB1c, FAS, ApoC2, PPARα and γ, α-SMA, α1 collagen and MCP1 mRNAs...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28202510/myc-mediates-large-oncosome-induced-fibroblast-reprogramming-in-prostate-cancer
#10
Valentina R Minciacchi, Cristiana Spinelli, Mariana Reis-Sobreiro, Lorenzo Cavallini, Sungyong You, Mandana Zandian, Xiaohong Li, Paola Chiarugi, Rosalyn M Adam, Edwin M Posadas, Giuseppe Viglietto, Michael R Freeman, Emanuele Cocucci, Neil A Bhowmick, Dolores Di Vizio
Communication between cancer cells and the tumor microenvironment results in the modulation of complex signaling networks that facilitate tumor progression. Here we describe a new mechanism of intercellular communication originating from large oncosomes (LO), which are cancer cell-derived, atypically large (1-10 μm) extracellular vesicles (EV). We demonstrate that, in the context of prostate cancer, LO harbor sustained AKT1 kinase activity, nominating them as active signaling platforms. Active AKT1 was detected in circulating EV from the plasma of metastatic prostate cancer patients and was LO specific...
February 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28202235/stx12-lncrna-mir-148a-smad5-participate-in-the-regulation-of-pancreatic-stellate-cell-activation-through-a-mechanism-involving-competing-endogenous-rna
#11
Hao Wang, Yanfeng Jiang, Ming Lu, Bei Sun, Xin Qiao, Dongbo Xue, Weihui Zhang
BACKGROUND: With the deepening of research, the roles of LncRNAs play in the fibrotic process have attracted great attention. At the early stage of pancreatic fibrogenesis, to effectively regulate pancreatic stellate cells (PSCs) activation is crucial for the treatment of chronic pancreatic fibrosis. METHODS: Microarray data on chronic pancreatitis were retrieved from the Gene Expression Omnibus (GEO) repository and analyzed using bioinformatic methods. A diagram of the lncRNA-miRNA-mRNA ceRNA network was constructed...
February 1, 2017: Pancreatology: Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]
https://www.readbyqxmd.com/read/28199906/aucubin-and-its-hydrolytic-derivative-attenuate-activation-of-hepatic-stellate-cells-via-modulation-of-tgf-%C3%AE-stimulation
#12
Pei-Yu Lv, Han Feng, Wei-Hua Huang, Ying-Ying Tian, Ya-Qin Wang, Yu-Hua Qin, Xiao-Hui Li, Kai Hu, Hong-Hao Zhou, Dong-Sheng Ouyang
Eucommia ulmoides is an important traditional Chinese medicine and has been used as a tonic with a long history. Aucubin is an active component extracted from Eucommia ulmoides, which has liver-protection effects. However the mechanisms are still unclear. To investigate the inhibitory effects and the underlying mechanisms of aucubin on TGF-β1-induced activation of hepatic stellate cells and ECM deposition, Human hepatic stellate cells (LX-2 cells) were incubated with TGF-β1 to evaluate the anti-fibrotic effect of aucubin...
February 8, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28199839/the-survival-of-motor-neuron-protein-acts-as-a-molecular-chaperone-for-mrnp-assembly
#13
Paul G Donlin-Asp, Claudia Fallini, Jazmin Campos, Ching-Chieh Chou, Megan E Merritt, Han C Phan, Gary J Bassell, Wilfried Rossoll
Spinal muscular atrophy (SMA) is a motor neuron disease caused by reduced levels of the survival of motor neuron (SMN) protein. SMN is part of a multiprotein complex that facilitates the assembly of spliceosomal small nuclear ribonucleoproteins (snRNPs). SMN has also been found to associate with mRNA-binding proteins, but the nature of this association was unknown. Here, we have employed a combination of biochemical and advanced imaging methods to demonstrate that SMN promotes the molecular interaction between IMP1 protein and the 3' UTR zipcode region of β-actin mRNA, leading to assembly of messenger ribonucleoprotein (mRNP) complexes that associate with the cytoskeleton to facilitate trafficking...
February 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28197934/fuzheng-huayu-formula-prevents-rat-renal-interstitial-fibrosis-induced-by-hgcl2-via-antioxidative-stress-and-down-regulation-of-nuclear-factor-kappa-b-activity
#14
Ji-Li Yuan, Yan-Yan Tao, Qing-Lan Wang, Li Shen, Cheng-Hai Liu
OBJECTIVE: To investigate the mechanism of action of Fuzheng Huayu Formula (, FZHY) against renal interstitial fibrosis (RIF) relating to oxidative injury and nuclear factor-kappa B (NF-κB) activity. METHODS: Thirty-two Sprague-Dawley rats were randomly divided into 3 groups: control group, model group and FZHY treatment group. The RIF model was induced by oral administration of HgCl2 at a dose of 8 mg/kg body weight once a day for 9 weeks. Meanwhile, rats in FZHY treatment group orally took FZHY at a dose of 4...
February 15, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28194671/activation-of-insulin-pi3k-akt-p70s6k-pathway-in-hepatic-stellate-cells-contributes-to-fibrosis-in-nonalcoholic-steatohepatitis
#15
Cindy X Cai, Hema Buddha, Shobha Castelino-Prabhu, Zhiwei Zhang, Robert S Britton, Bruce R Bacon, Brent A Neuschwander-Tetri
BACKGROUND AND AIMS: Hyperinsulinemia and insulin resistance are hallmark features of nonalcoholic fatty liver disease and steatohepatitis (NASH). It remains unclear whether and how insulin contributes to the development of fibrosis in NASH. In this study, we explored insulin signaling in the regulation of hepatic stellate cell (HSC) activation and the progression of NASH-fibrosis. METHODS: Phosphorylation of Akt and p70S6K were examined in primary HSC and in a rat model of NASH-fibrosis induced by high-fat and high-cholesterol diet for 24 weeks...
February 13, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28194023/interleukin-33-drives-hepatic-fibrosis-through-activation-of-hepatic-stellate-cells
#16
Zhongming Tan, Qianghui Liu, Runqiu Jiang, Long Lv, Siamak S Shoto, Isabelle Maillet, Valerie Quesniaux, Junwei Tang, Wenjie Zhang, Beicheng Sun, Bernhard Ryffel
Liver fibrosis is a consequence of chronic liver disease, causing morbidity and mortality. Interleukin-33 (IL-33) is a critical mediator of inflammation, which may be involved in the development of liver fibrosis. Here, we investigated the role of IL-33 in human patients and experimental bile-duct ligation (BDL)-induced fibrosis in mice. We report increased hepatic IL-33 expression in the murine BDL model of fibrosis and in surgical samples obtained from patients with liver fibrosis. Liver injury, inflammatory cell infiltration and fibrosis were reduced in the absence of the IL-33/ST2 receptor, and the activation of hepatic stellate cells (HSCs) was decreased in ST2-deficient mice...
February 13, 2017: Cellular & Molecular Immunology
https://www.readbyqxmd.com/read/28193854/gene-activation-of-smn-by-selective-disruption-of-lncrna-mediated-recruitment-of-prc2-for-the-treatment-of-spinal-muscular-atrophy
#17
Caroline J Woo, Verena K Maier, Roshni Davey, James Brennan, Guangde Li, John Brothers, Brian Schwartz, Susana Gordo, Anne Kasper, Trevor R Okamoto, Hans E Johansson, Berhan Mandefro, Dhruv Sareen, Peter Bialek, B Nelson Chau, Balkrishen Bhat, David Bullough, James Barsoum
Spinal muscular atrophy (SMA) is a neurodegenerative disease characterized by progressive motor neuron loss and caused by mutations in SMN1 (Survival Motor Neuron 1). The disease severity inversely correlates with the copy number of SMN2, a duplicated gene that is nearly identical to SMN1. We have delineated a mechanism of transcriptional regulation in the SMN2 locus. A previously uncharacterized long noncoding RNA (lncRNA), SMN-antisense 1 (SMN-AS1), represses SMN2 expression by recruiting the Polycomb Repressive Complex 2 (PRC2) to its locus...
February 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28193608/dectin-2-deficiency-modulates-th1-differentiation-and-improves-wound-healing-after-myocardial-infarction
#18
Xiaoxiang Yan, Hang Zhang, Qin Fan, Jian Hu, Rong Tao, Qiujing Chen, Yoichiro Iwakura, Weifeng Shen, Lin Lu, Qi Zhang, Ruiyan Zhang
Rationale: Macrophages are involved in wound healing after myocardial infarction (MI). The role of Dectin-2, a pattern recognition receptor mainly expressed on myeloid cells, in the infarct healing remains unknown. Objective: To determine whether Dectin-2 signaling is involved in the healing process and cardiac remodeling after MI, and to elucidate the underlying molecular mechanisms. Methods and Results: In a mouse model of permanent coronary ligation, Dectin-2, mainly expressed in macrophages, was shown to be increased in the early phase after MI...
February 13, 2017: Circulation Research
https://www.readbyqxmd.com/read/28193525/caffeic-acid-phenethyl-ester-attenuates-liver-fibrosis-via-inhibition-of-tgf-%C3%AE-1-smad3-pathway-and-induction-of-autophagy-pathway
#19
Ning Yang, Shuangsuo Dang, Juanjuan Shi, Fengping Wu, Mei Li, Xin Zhang, Yaping Li, Xiaoli Jia, Song Zhai
Caffeic acid phenethyl ester (CAPE) has been reported to possess the hepatoprotective effect. This study was to investigate the mechanism underlying CAPE against liver fibrosis in a liver fibrosis model induced by toxic carbon tetrachloride (CCl4) in male Sprague-Dawley rats and in vitro in CAPE (5 μM, 10 μM, 15 μM) treated hepatic stellate cells (HSC-T6). We found that CAPE treatment remarkably attenuated CCl4-induced liver fibrosis by blocking the activation of HSCs as determined by the expression alternation of transforming growth factor (TGF)-β1, phosphorylated Smad3 (p-Smad3), collage I, α-smooth muscle actin (α-SMA), matrix metalloproteinases (MMPs) 2, tissue inhibitor of matrix metalloproteinases (TIMPs) 1...
February 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28192889/effects-of-aristolochic-acid-i-and-or-hypokalemia-on-tubular-damage-in-c57bl-6-rat-with-aristolochic-acid-nephropathy
#20
Joo-Hark Yi, Sang-Woong Han, Wan-Young Kim, Jin Kim, Moon-Hyang Park
Background/Aims: This study was designed to investigate the roles of aristolochic acid I (AA-I) and hypokalemia in acute aristolochic acid nephropathy (AAN). Methods: After an adaptation period (1 week), a total of 40 C57BL/6 mice (male, 8 weeks old) were divided into four groups: I (control group), II (low potassium [K] diet), III (normal K diet with administration of AA-I [10 mg/kg weight]), and IV (low K diet with AA-I). After collecting 24 hours of urine at 2 weeks, the mice were sacrificed, and their blood and kidneys were obtained to perform immunochemical staining and/or Western blot analysis...
February 15, 2017: Korean Journal of Internal Medicine
keyword
keyword
46658
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"