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myosin light chain

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https://www.readbyqxmd.com/read/28644070/particulate-matter-disrupts-human-lung-endothelial-cell-barrier-integrity-via-rho-dependent-pathways
#1
Ting Wang, Yuka Shimizu, Xiaomin Wu, Gabriel T Kelly, Xiaoyan Xu, Lichun Wang, Zhongqing Qian, Yin Chen, Joe G N Garcia
Increased exposure to ambient particulate matter (PM) is associated with elevated morbidity and mortality in patients with cardiopulmonary diseases and cancer. We and others have shown that PM induces lung microvascular barrier dysfunction which potentially enhances the systemic toxicity of PM. However, the mechanisms by which PM disrupts vascular endothelial integrity remain incompletely explored. We hypothesize that PM induces endothelial cell (EC) cytoskeleton rearrangement via Rho GTPase-dependent pathways to facilitate vascular hyperpermeability...
June 23, 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28627341/-protective-effects-of-valproic-acid-on-gut-barrier-function-after-major-burn-injury-and-its-mechanism
#2
Hongmin Luo, Sen Hu, Huining Bian, Shaoyi Zheng, Bing Xiong, Zhifeng Huang, Zuan Liu, Chuanwei Sun, Lianghua Ma, Hanhua Li, Wen Yu, Minghua Du, Huade Chen, Wen Lai
OBJECTIVE: To investigate the potential protective effects of valproic acid (VPA) on gut barrier function after major burn injury in rats and its mechanism. METHODS: Forty male Sprague-Dawley (SD) rats were divided into sham + normal saline (NS), sham + VPA, scald + NS, and scald + VPA groups, with 10 rats in each group. Rat with 55% total body surface area (TBSA) third-degree severe-burns model was reproduced by immersing into 80 °C water, and the rats in sham groups were given sham-burns by immersing into 37 °C water...
March 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28618653/myosin-regulatory-light-chain-phosphorylation-is-associated-with-leiomyosarcoma-development
#3
Hua-Shan Li, Qian Lin, Jia Wu, Zhi-Hui Jiang, Jia-Bi Zhao, Jian Pan, Wei-Qi He, Juan-Min Zha
Leiomyosarcoma is a rare malignant smooth muscle tumor which can be very unpredictable. Myosin II is involved in many functions, including cell contraction, migration, and adhesion. The phosphorylation of myosin regulatory light chain (MLC) by myosin light chain kinase (MLCK) determines the activity of Myosin II. However, it is still unclear whether MLC phosphorylation is involved in cell proliferation in leiomyosarcoma. In this study, we aimed to explore the role of MLCK-dependent MLC phosphorylation in leiomyosarcoma development...
June 10, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28610850/dietary-myo-inositol-deficiency-decreased-the-growth-performances-and-impaired-intestinal-physical-barrier-function-partly-relating-to-nrf2-jnk-e2f4-and-mlck-signaling-in-young-grass-carp-ctenopharyngodon-idella
#4
Shuang-An Li, Wei-Dan Jiang, Lin Feng, Yang Liu, Pei Wu, Jun Jiang, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Xiao-Qiu Zhou
In this study, we investigated the effects of dietary myo-inositol on the growth and intestinal physical barrier functions of young grass carp (Ctenopharyngodon idella). A total of 540 young grass carp (221.83 ± 0.84 g) were fed six diets containing graded levels of myo-inositol (27.0, 137.9, 286.8, 438.6, 587.7 and 737.3 mg/kg) for 10 weeks. After the growth trial, fish were challenged with Aeromonas hydrophila for 14 days. The results indicated that compared with optimal myo-inositol levels, myo-inositol deficiency (27...
June 10, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28608282/poly-adp-ribosylated-proteins-in-mononuclear-cells-from-patients-with-type-2-diabetes-identified-by-proteomic-studies
#5
Alessandra Giorgi, Italo Tempera, Giorgia Napoletani, Diego Drovandi, Cinzia Potestà, Sara Martire, Elisabetta Mandosi, Tiziana Filardi, M Eugenia Schininà, Susanna Morano, Maria d'Erme, Bruno Maras
AIMS: In diabetes, hyperglycemia increases reactive oxygen species that induce DNA damage and poly(ADP-ribose)polymerase activation. The aim of this study is to characterize the proteomic profile and the role of poly(ADP-ribosylation) in patients with type 2 diabetes. METHODS: A proteomic platform based on 2DE and MALDI-ToF spectrometry was applied to peripheral blood mononuclear cells obtained from two different cohorts in which diabetic (n = 14) and normoglycemic patients (n = 11) were enrolled...
June 12, 2017: Acta Diabetologica
https://www.readbyqxmd.com/read/28602422/loss-of-function-variants-in-mylk-cause-recessive-megacystis-microcolon-intestinal-hypoperistalsis-syndrome
#6
Danny Halim, Erwin Brosens, Françoise Muller, Michael F Wangler, Arthur L Beaudet, James R Lupski, Zeynep H Coban Akdemir, Michael Doukas, Hans J Stoop, Bianca M de Graaf, Rutger W W Brouwer, Wilfred F J van Ijcken, Jean-François Oury, Jonathan Rosenblatt, Alan J Burns, Dick Tibboel, Robert M W Hofstra, Maria M Alves
Megacystis microcolon intestinal hypoperistalsis syndrome (MMIHS) is a congenital disorder characterized by loss of smooth muscle contraction in the bladder and intestine. To date, three genes are known to be involved in MMIHS pathogenesis: ACTG2, MYH11, and LMOD1. However, for approximately 10% of affected individuals, the genetic cause of the disease is unknown, suggesting that other loci are most likely involved. Here, we report on three MMIHS-affected subjects from two consanguineous families with no variants in the known MMIHS-associated genes...
June 7, 2017: American Journal of Human Genetics
https://www.readbyqxmd.com/read/28600322/rac1-switching-at-the-right-time-and-location-is-essential-for-fc%C3%AE-receptor-mediated-phagosome-formation
#7
Yuka Ikeda, Katsuhisa Kawai, Akira Ikawa, Kyoko Kawamoto, Youhei Egami, Nobukazu Araki
Lamellipodia are sheet-like cell protrusions driven by actin polymerization mainly through Rac1, a GTPase molecular switch. In Fcγ receptor-mediated phagocytosis of IgG-opsonized erythrocytes (IgG-Es), Rac1 activation is required for lamellipodial extension along the surface of IgG-Es. However, the significance of Rac1 deactivation in phagosome formation is poorly understood. Our live-cell imaging and electron microscopy revealed that RAW264 macrophages expressing a constitutively active Rac1 mutant showed defects in phagocytic cup formation, while lamellipodia were formed around IgG-Es...
June 9, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28598488/myosin-light-chain-kinase-knockout-improves-gut-barrier-function-and-confers-a-survival-advantage-in-polymicrobial-sepsis
#8
C Adam Lorentz, Zhe Liang, Mei Meng, Ching-Wen Chen, Benyam P Yoseph, Elise R Breed, Rohit Mittal, Nathan J Klingensmith, Alton B Farris, Eileen M Burd, Michael Koval, Mandy L Ford, Craig M Coopersmith
Sepsis-induced intestinal hyperpermeability is mediated by disruption of the epithelial tight junction, which is closely associated with the peri-junctional actin-myosin ring. Myosin light chain kinase (MLCK) phosphorylates the myosin regulatory light chain, resulting in increased permeability. The purpose of this study was to determine whether genetic deletion of MLCK would alter gut barrier function and survival from sepsis. MLCK(-/-) and wild type (WT) mice were subjected to cecal ligation and puncture and assayed for both survival and mechanistic studies...
June 7, 2017: Molecular Medicine
https://www.readbyqxmd.com/read/28596242/smooth-muscle-function-and-myosin-polymerization
#9
Pasquale Chitano, Lu Wang, Gabrielle Y Y Tin, Mitsuo Ikebe, Peter D Paré, Chun Y Seow
Smooth muscle is able to function over a much broader length range than striated muscle. The ability to maintain contractility after a large length change is thought to be due to an adaptive process involving restructuring of the contractile apparatus to maximize overlap between the contractile filaments. The molecular mechanism for the length-adaptive behavior is largely unknown. In smooth muscle adapted to different lengths we quantified myosin monomers, basal and activation-induced myosin light chain (MLC) phosphorylation, shortening-velocity, power-output and active force...
June 8, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28596238/loss-of-%C3%AE-pix-inhibits-focal-adhesion-disassembly-and-promotes-keratinocyte-motility-via-myosin-light-chain-activation
#10
Sho Hiroyasu, Gregory P Stimac, Susan B Hopkinson, Jonathan C R Jones
During healing of the skin, the cytoskeleton of keratinocytes and their matrix adhesions, including focal adhesions (FAs), undergo reorganization. These changes are coordinated by small GTPases and their regulators, including the guanine nucleotide exchange factor β-PIX. In fibroblasts, β-PIX activates small GTPases, thereby enhancing migration. In keratinocytes in vitro, β-PIX localizes to FAs. To study β-PIX functions, we generated β-PIX knockdown keratinocytes. During wound closure of β-PIX knockdown cell monolayers, disassembly of FA is impaired and their number and size are increased...
June 8, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28588494/myosin-light-chain-kinase-a-potential-target-for-treatment-of-inflammatory-diseases
#11
REVIEW
Yongjian Xiong, Chenou Wang, Liqiang Shi, Liang Wang, Zijuan Zhou, Dapeng Chen, Jingyu Wang, Huishu Guo
Myosin light chain kinase (MLCK) induces contraction of the perijunctional apical actomyosin ring in response to phosphorylation of the myosin light chain. Abnormal expression of MLCK has been observed in respiratory diseases, pancreatitis, cardiovascular diseases, cancer, and inflammatory bowel disease. The signaling pathways involved in MLCK activation and triggering of endothelial barrier dysfunction are discussed in this review. The pharmacological effects of regulating MLCK expression by inhibitors such as ML-9, ML-7, microbial products, naturally occurring products, and microRNAs are also discussed...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28588038/the-amp-related-kinase-ampk-induces-ca-2-independent-dilation-of-resistance-arteries-by-interfering-with-actin-filament-formation
#12
Kai M Schubert, Jiehua Qiu, Stephanie Blodow, Margarethe Wiedenmann, Lubomir T Lubomirov, Gabriele Pfitzer, Ulrich Pohl, Holger Schneider
Rationale: Decreasing Ca(2+) sensitivity of vascular smooth muscle (VSM) allows for vasodilation without lowering of cytosolic Ca(2+) This may be particularly important in states requiring maintained dilation such as hypoxia. AMPK is an important cellular energy sensor in VSM. Regulation of Ca(2+) sensitivity usually is attributed to myosin light chain phosphatase (MLCP) activity but findings in non-VSM identified changes in the actin cytoskeleton. The potential role of AMPK in this setting is widely unknown...
June 6, 2017: Circulation Research
https://www.readbyqxmd.com/read/28582757/comparative-analysis-of-muscle-phosphoproteome-induced-by-salt-curing
#13
Zhenyu Wang, Caixia Zhang, Zheng Li, Qingwu Shen, Dequan Zhang
Phosphorylated proteins in ovine muscle induced by salt curing were well investigated. Ten topside muscles of crossbred sheep were ground, mixed and divided into two groups, which were cured for 16h with 0% and 3% NaCl, respectively. Muscle proteins of two cured groups were analyzed by two-dimensional electrophoresis coupled with Pro-Q Diamond and SYPRO Ruby staining. The differential phosphorylated proteins were determined using LC-MS/MS and the UniProt database. Ten different phosphoproteins (>1.5 fold) induced by salting were identified, including triosephosphate isomerase, glycogen phosphorylase, creatine kinase M-type, myoglobin, troponin T fast skeletal muscle type, actin, myosin light chain 1/3, tropomyosin beta chain, etc...
May 23, 2017: Meat Science
https://www.readbyqxmd.com/read/28575052/myogenic-differentiation-of-vcp-disease-induced-pluripotent-stem-cells-a-novel-platform-for-drug-discovery
#14
Katrina J Llewellyn, Angèle Nalbandian, Lan N Weiss, Isabela Chang, Howard Yu, Bibo Khatib, Baichang Tan, Vanessa Scarfone, Virginia E Kimonis
Valosin Containing Protein (VCP) disease is an autosomal dominant multisystem proteinopathy caused by mutations in the VCP gene, and is primarily associated with progressive muscle weakness, including atrophy of the pelvic and shoulder girdle muscles. Currently, no treatments are available and cardiac and respiratory failures can lead to mortality at an early age. VCP is an AAA ATPase multifunction complex protein and mutations in the VCP gene resulting in disrupted autophagic clearance. Due to the rarity of the disease, the myopathic nature of the disorder, ethical and practical considerations, VCP disease muscle biopsies are difficult to obtain...
2017: PloS One
https://www.readbyqxmd.com/read/28558721/extracellular-heat-shock-protein-90%C3%AE-mediates-hdm-induced-bronchial-epithelial-barrier-dysfunction-by-activating-rhoa-mlc-signaling
#15
Hang-Ming Dong, Yan-Qing Le, Yan-Hong Wang, Hai-Jin Zhao, Chao-Wen Huang, Ya-Hui Hu, Li-Shan Luo, Xuan Wan, Yi-Lan Wei, Zi-Qiang Chu, Wei Li, Shao-Xi Cai
BACKGROUND: The disruption and hyperpermeability of bronchial epithelial barrier are closely related to the pathogenesis of asthma. House dust mite (HDM), one of the most important allergens, could increase the airway epithelial permeability. Heat shock protein (Hsp) 90α is also implicated in the lung endothelial barrier dysfunction by disrupting RhoA signaling. However, the effect of extracellular Hsp90α (eHsp90α) on the bronchial epithelial barrier disruption induced by HDM has never been reported...
May 30, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28549941/dietary-zinc-deficiency-reduced-growth-performance-intestinal-immune-and-physical-barrier-functions-related-to-nf-%C3%AE%C2%BAb-tor-nrf2-jnk-and-mlck-signaling-pathway-of-young-grass-carp-ctenopharyngodon-idella
#16
Zheng-Xing Song, Wei-Dan Jiang, Yang Liu, Pei Wu, Jun Jiang, Xiao-Qiu Zhou, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Lin Feng
Our study investigated the effects of dietary zinc (Zn) deficiency on growth performance, intestinal immune and physical barrier functions of young grass carp (Ctenopharyngodon idella). A total of 630 grass carp (244.14 ± 0.40 g) were fed graded levels of zinc lactate (10.71, 30.21, 49.84, 72.31, 92.56, 110.78 mg Zn/kg diet) and one zinc sulfate group (56.9 mg Zn/kg diet) for 60 days. At the end of the feeding trial, fish were challenged with Aeromonas hydrophila for 14 days. These results indicated that compared with optimal dietary Zn level, dietary Zn deficiency (10...
May 23, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28532683/the-essential-oil-from-the-twigs-of-cinnamomum-cassia-presl-inhibits-oxytocin-induced-uterine-contraction-in-vitro-and-in-vivo
#17
Lan Sun, Li-Na Liu, Jia-Chun Li, Yao-Zhong Lv, Shao-Bo Zong, Jun Zhou, Zheng-Zhong Wang, Jun-Ping Kou, Wei Xiao
ETHNOPHARMACOLOGICAL RELEVANCE: The twigs and bark of Cinnamomum cassia Presl (Lauraceae) are widely used in traditional Chinese medicine in the treatment of tumor, abdominal pain, dysmenorrhea, digestive system disease and inflammatory diseases. The aim of this study was to determine the inhibitory effect of the essential oil from the twigs of Cinnamomum cassia Presl (EOCC) on uterine contraction in vitro and in vivo. MATERIALS AND METHODS: The Institute of Cancer Research (ICR) mouse uterine contraction was induced by oxytocin (OT) exposure following estradiol benzoate pretreatment...
May 19, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28530580/offgel-electrophoresis-and-tandem-mass-spectrometry-approach-compared-with-dna-based-pcr-method-for-authentication-of-meat-species-from-raw-and-cooked-ground-meat-mixtures-containing-cattle-meat-water-buffalo-meat-and-sheep-meat
#18
Basappa M Naveena, Deepak S Jagadeesh, A Jagadeesh Babu, T Madhava Rao, Veeranna Kamuni, S Vaithiyanathan, Vinayak V Kulkarni, Srikanth Rapole
The present study compared the accuracy of an OFFGEL electrophoresis and tandem mass spectrometry-based proteomic approach with a DNA-based method for meat species identification from raw and cooked ground meat mixes containing cattle, water buffalo and sheep meat. The proteomic approach involved the separation of myofibrillar proteins using OFFGEL electrophoresis, SDS-PAGE and protein identification by MALDI-TOF MS. Species-specific peptides derived from myosin light chain-1 and 2 were identified for authenticating buffalo meat spiked at a minimum 0...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530130/injectable-graft-substitute-active-on-bone-tissue-regeneration
#19
Michela Bosetti, Alessia Borrone, Massimiliano Leigheb, Prasad Shastri, Mario Cannas
With the aim to obtain an injectable bioactive scaffold that can accelerate bone formation in sinus lift augmentation, in bony void and in fracture repair, we have developed a three-dimensional (3D) jelly collagen containing Lysophosphatidic acid (LPA) and 1α,25-Dihydroxyvitamin D3 (1,25D3). Using an in vitro 3D culture model of bone fracture we show that the contraction of the collagen gel is mediated by Rho-kinase activation in osteoblasts. This contraction was cell concentration dependent and was increased by LPA which favored apposition and fastening of bone fragments approach...
May 20, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28520587/complementary-roles-of-nod2-in-hematopoietic-and-nonhematopoietic-cells-in-preventing-gut-barrier-dysfunction-dependent-on-mlck-activity
#20
Ziad Al Nabhani, Nicolas Montcuquet, Maryline Roy, Monique Dussaillant, Jean-Pierre Hugot, Frédérick Barreau
BACKGROUND: Crohn's disease (CD) pathogenesis is multifactorial involving genetic and environmental factors. Loss of function mutations in the nucleotide oligomerization domain 2 (NOD2) gene are the main genetic risk factor for CD. Like patients with CD, Nod2 mice are characterized by an enhanced Th1 immune response and a defective mucosal barrier function evidenced by increased intestinal permeability. We previously showed that the latter is related to hematopoietic Nod2 deficiency. Our aim was to explore the mechanisms by which Nod2 expressed in the hematopoietic and in the nonhematopoietic compartments interplay to control epithelial paracellular permeability...
July 2017: Inflammatory Bowel Diseases
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