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"camkii" OR "calcium/calmodulin dependent kinase type II"

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https://www.readbyqxmd.com/read/29628206/odorant-receptor-might-be-related-to-sperm-dna-integrity-in-apis-cerana-cerana
#1
Lina Guo, Huiting Zhao, Bing Xu, Yusuo Jiang
Olfactory receptors (ORs) are important for insects to recognize and discriminate odorants in the environment and are mainly expressed in olfactory and gustatory organs. Little is known about the potential OR functions in non-olfactory tissues. In the present study, we evaluated the possibility of odorant receptors AcerOr1 and AcerOr2 (AcerOr2 is orthologous to the co-receptor) mediating sperm DNA integrity, and the relationship between sperm DNA integrity and semen parameters in Apis cerana cerana. Based on previous findings in mammals, we speculated that the Ca2+ /calmodulin (CaM)/CaM-dependent protein kinase II (CaMKII) signaling pathway might be involved in the regulation of sperm motility in A...
March 31, 2018: Animal Reproduction Science
https://www.readbyqxmd.com/read/29626161/extracellular-atp-activates-hyaluronan-synthase-2-has2-in-epidermal-keratinocytes-via-p2y-2-ca-2-signaling-and-mapk-pathways
#2
Leena Rauhala, Tiina Jokela, Riikka Kärnä, Geneviève Bart, Piia Takabe, Sanna Oikari, Markku I Tammi, Sanna Pasonen-Seppänen, Raija H Tammi
Extracellular nucleotides are used as signaling molecules by several cell types. In epidermis, their release is triggered by insults such as ultraviolet radiation, barrier disruption and wounding and by specific nerve terminals firing. Increased synthesis of hyaluronan, a ubiquitous extracellular matrix glycosaminoglycan, also occurs in response to stress, leading to the attractive hypothesis that nucleotide signaling and hyaluronan synthesis could also be linked. In HaCaT keratinocytes ATP caused a rapid and strong but transient activation of hyaluronan synthase 2 ( HAS2 ) expression via PKC-, CaMKII-, MAPK- and CREB-dependent pathways by activating the purinergic P2Y2 receptor...
April 6, 2018: Biochemical Journal
https://www.readbyqxmd.com/read/29620520/synapse-specific-and-compartmentalized-expression-of-presynaptic-homeostatic-potentiation
#3
Xiling Li, Pragya Goel, Catherine Chen, Varun Angajala, Xun Chen, Dion K Dickman
Postsynaptic compartments can be specifically modulated during various forms of synaptic plasticity, but it is unclear whether this precision is shared at presynaptic terminals. Presynaptic Homeostatic Plasticity (PHP) stabilizes neurotransmission at the Drosophila neuromuscular junction, where a retrograde enhancement of presynaptic neurotransmitter release compensates for diminished postsynaptic receptor functionality. To test the specificity of PHP induction and expression, we have developed a genetic manipulation to reduce postsynaptic receptor expression at one of the two muscles innervated by a single motor neuron...
April 5, 2018: ELife
https://www.readbyqxmd.com/read/29617678/increased-asics-expression-via-the-camkii-creb-pathway-in-a-novel-mouse-model-of-trigeminal-pain
#4
Yan Wang, Xiujuan Fu, Lifang Huang, Xi Wang, Zuneng Lu, Fan Zhu, Zheman Xiao
BACKGROUND/AIMS: Migraine is a disabling condition that severely impacts socioeconomic function and quality of life. The focus of this study was to develop a mouse model of trigeminal pain that mimics migraine. METHODS: After undergoing dural cannulation surgery, mice were treated with repeated dural doses of an acidic solution to induce trigeminal pain. RESULTS: The method elicited intermittent, head-directed wiping and scratching as well as the expression of both the c-FOS gene in the spinal trigeminal nucleus caudalis and calcitonin gene related peptide (CGRP) in the periaqueductal grey matter...
March 28, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29615706/analysis-of-the-camkii%C3%AE-and-%C3%AE-splice-variant-distribution-among-brain-regions-reveals-isoform-specific-differences-in-holoenzyme-formation
#5
Sarah G Cook, Ashley M Bourke, Heather O'Leary, Vincent Zaegel, Erika Lasda, Janna Mize-Berge, Nidia Quillinan, Chandra L Tucker, Steven J Coultrap, Paco S Herson, K Ulrich Bayer
Four CaMKII isoforms are encoded by distinct genes, and alternative splicing within the variable linker-region generates additional diversity. The α and β isoforms are largely brain-specific, where they mediate synaptic functions underlying learning, memory and cognition. Here, we determined the α and β splice-variant distribution among different mouse brain regions. Surprisingly, the nuclear variant αB was detected in all regions, and even dominated in hypothalamus and brain stem. For CaMKIIβ, the full-length variant dominated in most regions (with higher amounts of minor variants again seen in hypothalamus and brain stem)...
April 3, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29614493/propofol-disrupts-aerobic-glycolysis-in-colorectal-cancer-cells-via-inactivation-of-the-nmdar-camkii-erk-pathway
#6
Xiangyuan Chen, Qichao Wu, Pengfei Sun, Yanjun Zhao, Minmin Zhu, Changhong Miao
BACKGROUND/AIMS: To investigate the effect of propofol on glucose metabolism in colorectal cancer cells and in an in vivo xenograft model. METHODS: Glucose metabolism was assessed by measuring the extracellular acidification rate in HT29 and SW480 colorectal cancer cells. Quantitative real-time PCR and western blot analyses were used to detect mRNA and protein levels, respectively. Intracellular calcium was assessed by using a Fluo-3 AM fluorescence kit. Micro-positron emission tomography/computed tomography (microPET/CT) imaging was used to analyze glucose metabolism in the tumors of the xenograft model...
March 26, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29614314/glun2b-camkii-mediates-cfa-induced-hyperalgesia-via-hdac4-modified-spinal-cox2-transcription
#7
Cheng-Yuan Lai, Ming-Chun Hsieh, Yu-Cheng Ho, Gin-Den Chen, Dylan Chou, Ting Ruan, An-Sheng Lee, Hsueh-Hsiao Wang, Yat-Pang Chau, Hsien-Yu Peng, Cheng-Hung Lai
Histone deacetylase 4 (HDAC4), which actively shuttles between the nucleus and cytoplasm, is an attractive candidate for a repressor mechanism in epigenetic modification. However, the potential role of HDAC4-dependent epigenetics in the neural plasticity underlying the development of inflammatory pain has not been well established. By injecting complete Freund's adjuvant (CFA) into the hind-paw of Sprague-Dawley rats (200-250 g), we found animals displayed behavioral hyperalgesia was accompanied with HDAC4 phosphorylation and cytoplasmic redistribution in the dorsal horn neurons...
March 31, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29614261/the-novel-camkii-inhibitor-gs-680-reduces-diastolic-sr-ca-leak-and-prevents-camkii-dependent-pro-arrhythmic-activity
#8
S Lebek, A Plößl, M Baier, J Mustroph, D Tarnowski, C M Lücht, S Schopka, B Floerchinger, C Schmid, Y Zausig, N Pagratis, B Marchand, D O Koltun, W K Hung, S Ahmadyar, L Belardinelli, L S Maier, S Wagner
RATIONALE: Ca/calmodulin-dependent protein kinase II (CaMKII) was shown to increase diastolic sarcoplasmic reticulum (SR) Ca leak, which can result in delayed afterdepolarizations and triggered arrhythmias. Since increased CaMKII expression and activity has been mechanistically linked to arrhythmias in human heart failure (HF) and atrial fibrillation (AF), specific strategies aimed at CaMKII inhibition may have therapeutic potential. OBJECTIVE: We tested the antiarrhythmic and inotropic effects of a novel selective and ATP-competitive CaMKII inhibitor (GS-680)...
March 31, 2018: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29608040/muscle-restricted-nuclear-receptor-interaction-protein-knockout-causes-motor-neuron-degeneration-through-down-regulation-of-myogenin-at-the-neuromuscular-junction
#9
Hsin-Hsiung Chen, Li-Kai Tsai, Kuan-Yu Liao, Tung-Chien Wu, Yun-Hsin Huang, Yuan-Chun Huang, Szu-Wei Chang, Pei-Yu Wang, Yeou-Ping Tsao, Show-Li Chen
BACKGROUND: Nuclear receptor interaction protein (NRIP) is a calcium/calmodulin (CaM) binding protein. Nuclear receptor interaction protein interacts with CaM to activate calcineurin and CaMKII signalling. The conventional NRIP knockout mice (global knockout) showed muscular abnormality with reduction of muscle oxidative functions and motor function defects. METHODS: To investigate the role of NRIP on neuromuscular system, we generated muscle-restricted NRIP knockout mice [conditional knockout (cKO)]...
April 2, 2018: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29607715/hedgehog-signaling-contributes-to-bone-cancer-pain-by-regulating-sensory-neuron-excitability-in-rats
#10
Su Liu, You Lv, Xin-Xin Wan, Zhi-Jing Song, Yue-Peng Liu, Shuai Miao, Guang-Lei Wang, Gong-Jian Liu
Treating bone cancer pain continues to be a clinical challenge and underlying mechanisms of bone cancer pain remain elusive. Here, we reported that sonic hedgehog signaling plays a critical role in the development of bone cancer pain. Tibia bone cavity tumor cell implantation produces bone cancer-related mechanical allodynia, thermal hyperalgesia, and spontaneous and movement-evoked pain behaviors. Production and persistence of these pain behaviors are well correlated with tumor cell implantation-induced up-regulation and activation of sonic hedgehog signaling in primary sensory neurons and spinal cord...
January 2018: Molecular Pain
https://www.readbyqxmd.com/read/29604078/maternal-undernutrition-in-late-gestation-increases-igf2-signalling-molecules-and-collagen-deposition-in-the-right-ventricle-of-the-fetal-sheep-heart
#11
Jack R T Darby, I Caroline McMillen, Janna L Morrison
Exposure of the fetus to a range of environmental stressors, including maternal undernutrition, is associated with an increased risk of death from cardiovascular disease (CVD) in adult life. This study aimed to determine the effect of maternal nutrient restriction in late gestation on the molecular mechanisms that regulate cardiac growth and development of the fetal heart. Maternal undernutrition resulted in a decrease in fetal glucose concentrations across late gestation, whilst fetal arterial PO2 remained unchanged between the control and late gestation undernutrition (LGUN) groups...
March 31, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29603329/calcium-calmodulin-dependent-protein-kinaseii-in-occlusion-induced-degenerative-cartilage-of-rat-mandibular-condyle
#12
Qian Liu, Hong-Xu Yang, Xiang-Hong Wan, Mian Zhang, Jing Zhang, Lei Lu, Mianjiao Xie, Hao-Tian Ren, Shi-Bin Yu, Xiao-Dong Liu, Meiqing Wang
Activated calcium/calmodulin dependent protein kinaseII (CaMKII) is important to promote chondrocytes from proliferative to pre-hypertrophic state, which probably plays a role in osteoarthritis (OA), a wide-spread degeneration disease with enhanced aberrant chondrocyte differentiation. Our aim is to detect the role of CaMKII, and its relationship with Indian hedgehog (Ihh)-Parathyroid-related peptide (PTHrP) feedback loop in the temporomandibular joints (TMJs) OA. KN93, the competitive inhibitor of CaMKII, was added to the culture medium in vitro, and was locally injected to rats TMJs (n=54, female) every other day for 4 weeks from the beginning of the 5th and 9th week after installing of unilateral anterior crossbite (UAC), termed as 4wk+4wk and 8wk+4wk, accordingly...
March 30, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29603093/oxaliplatin-modulates-the-characteristics-of-voltage-gated-calcium-channels-and-action-potentials-in-small-dorsal-root-ganglion-neurons-of-rats
#13
Linda-Isabell Schmitt, Markus Leo, Christoph Kleinschnitz, Tim Hagenacker
Oxaliplatin is important for treating colorectal cancer. Although oxaliplatin is highly effective, it has severe side effects, of which neurotoxicity in dorsal root ganglion (DRG) neurons is one of the most common. The key mechanisms of this neurotoxicity are still controversial. However, disturbances of calcium homeostasis in DRG neurons have been suggested to mediate oxaliplatin neurotoxicity. By using whole-cell patch-clamp and current-clamp techniques, as well as immunocytochemical staining, we examined the influence of short- and long-term exposure to oxaliplatin on voltage-gated calcium channels (VGCC) and different VGCC subtypes in small DRG neurons of rats in vitro...
March 30, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29602494/motor-coordination-and-synaptic-plasticity-deficits-are-associated-with-increased-cerebellar-activity-of-nadph-oxidase-camkii-and-pkc-at-preplaque-stage-in-the-tgcrnd8-mouse-model-of-alzheimer-s-disease
#14
Roberto Russo, Fabio Cattaneo, Pellegrino Lippiello, Claudia Cristiano, Fabio Zurlo, Martina Castaldo, Carlo Irace, Tiziana Borsello, Rita Santamaria, Rosario Ammendola, Antonio Calignano, Maria Concetta Miniaci
Numerous studies indicate that the cerebellum undergoes structural and functional neurodegenerative changes in Alzheimer's disease. The purpose of this study was to examine the extent of cerebellar alterations at early, preplaque stage of the pathology in TgCRND8 mice through behavioral, electrophysiological, and molecular analysis. Balance beam test and foot-printing analysis revealed significant motor coordination and balance deficits in 2-month-old TgCRND8 mice compared to their littermates. Patch-clamp recordings performed on cerebellar slices of transgenic mice showed synaptic plasticity deficit and loss of noradrenergic modulation at parallel fiber-Purkinje cell synapse suggesting an early dysfunction of the cerebellar circuitry due to amyloid precursor protein overexpression...
March 5, 2018: Neurobiology of Aging
https://www.readbyqxmd.com/read/29599132/camkii-ca-2-calmodulin-dependent-kinase-ii-in-mitochondria-of-smooth-muscle-cells-controls-mitochondrial-mobility-migration-and-neointima-formation
#15
Emily K Nguyen, Olha M Koval, Paige Noble, Kim Broadhurst, Chantal Allamargot, Meng Wu, Stefan Strack, William H Thiel, Isabella M Grumbach
OBJECTIVE: The main objective of this study is to define the mechanisms by which mitochondria control vascular smooth muscle cell (VSMC) migration and impact neointimal hyperplasia. APPROACH AND RESULTS: The multifunctional CaMKII (Ca2+ /calmodulin-dependent kinase II) in the mitochondrial matrix of VSMC drove a feed-forward circuit with the mitochondrial Ca2+ uniporter (MCU) to promote matrix Ca2+ influx. MCU was necessary for the activation of mitochondrial CaMKII (mtCaMKII), whereas mtCaMKII phosphorylated MCU at the regulatory site S92 that promotes Ca2+ entry...
March 29, 2018: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/29598867/role-of-stress-kinase-jnk-in-binge-alcohol-evoked-atrial-arrhythmia
#16
Jiajie Yan, Justin K Thomson, Weiwei Zhao, Xianlong Gao, Fei Huang, Biyi Chen, Qingrong Liang, Long-Sheng Song, Michael Fill, Xun Ai
BACKGROUND: Excessive binge alcohol drinking has acute cardiac arrhythmogenic effects, including promotion of atrial fibrillation (AF), which underlies "Holiday Heart Syndrome." The mechanism that couples binge alcohol abuse with AF susceptibility remains unclear. We previously reported stress-activated c-Jun N-terminal kinase (JNK) signaling contributes to AF development. This is interesting because JNK is implicated in alcohol-caused organ malfunction beyond the heart. OBJECTIVES: The purpose of this study was to detail how JNK promotes binge alcohol-evoked susceptibility to AF...
April 3, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/29595072/platycodin-d-reverses-pathological-cardiac-hypertrophy-and-fibrosis-in-spontaneously-hypertensive-rats
#17
Yuan-Chuan Lin, Yu-Chen Lin, Wei-Wen Kuo, Chia-Yao Shen, Yi-Chang Cheng, Yueh-Min Lin, Ruey-Lin Chang, Vijaya V Padma, Chih-Yang Huang, Chih-Yang Huang
Platycodin D (PD) is the main active saponin isolated from Platycodon grandiflorum (PG) and is reported to exhibit anticancer, anti-angiogenic, anti-inflammation and anti-obesity biological effects. The current study aims to evaluate the therapeutic efficacy of PD in cardiac fibrosis and for hypertrophy in spontaneous hypertension rats (SHRs) and to verify inhibition of the signaling pathway. Significant increases in the cardiac functional indices of left ventricular internal diameter end diastole (LVIDd) and left ventricular internal diameter end systole (LVIDs); the eccentric hypertrophy marker p-MEK5; concentric hypertrophy markers, such as CaMKII[Formula: see text] and calcineurin; and expression levels of NFATc3, p-GATA4 and BNP were observed in spontaneously hypertensive groups...
March 29, 2018: American Journal of Chinese Medicine
https://www.readbyqxmd.com/read/29593308/the-anti-cancer-multikinase-inhibitor-sorafenib-impairs-cardiac-contractility-by-reducing-phospholamban-phosphorylation-and-sarcoplasmic-calcium-transients
#18
Christopher Schneider, Markus Wallner, Ewald Kolesnik, Viktoria Herbst, Heinrich Mächler, Martin Pichler, Dirk von Lewinski, Simon Sedej, Peter P Rainer
Tyrosine-kinase inhibitors (TKIs) have revolutionized cancer therapy in recent years. Although more targeted than conventional chemotherapy, TKIs exhibit substantial cardiotoxicity, often manifesting as hypertension or heart failure. Here, we assessed myocyte intrinsic cardiotoxic effects of the TKI sorafenib and investigated underlying alterations of myocyte calcium homeostasis. We found that sorafenib reversibly decreased developed force in auxotonically contracting human myocardia (3 µM: -25 ± 4%, 10 µM: -29 ± 7%, 30 µM: -43 ± 12%, p < 0...
March 28, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29589179/expression-of-hypoxia-inducible-factor-1alpha-is-protein-kinase-a-dependent-in-primary-cortical-astrocytes-exposed-to-severe-hypoxia
#19
Prabhu Ramamoorthy, Grace Xu, Honglian Shi
The hypoxia inducible factor 1 (HIF-1) and the cyclic AMP-responsive element binding protein (CREB) are two transcription factors that have been studied in the context of neuronal survival and neurodegeneration. HIF-1 upregulation and CREB activation have been observed not only in neurons but also in astrocytes under conditions of hypoxia. We hypothesized that activation of CREB regulate HIF-1α expression in the nucleus of cortical astrocytes under in vitro ischemic condition. To test the hypothesis, we determined the effects of inhibiting the CREB activation pathway on the expression of HIF-1α protein in astrocytes exposed to CoCl2 and severe hypoxia (near anoxia, 0...
March 27, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29588219/exercise-induced-reductions-in-mitochondrial-adp-sensitivity-contribute-to-the-induction-of-gene-expression-and-mitochondrial-biogenesis-through-enhanced-mitochondrial-h-2-o-2-emission
#20
Paula M Miotto, Graham P Holloway
Acute exercise rapidly induces mitochondrial gene expression, however, the intracellular events regulating this process remain incompletely understood. The purpose of this study was to determine whether reductions in mitochondrial ADP sensitivity during exercise have a biological role in regulating mitochondrial-derived reactive oxygen species (ROS) production and the induction of mitochondrial biogenesis. Mitochondrial creatine kinase wildtype (WT) and knockout (KO) mice have divergent responses in ADP sensitivity during exercise, and we therefore used these mice to determine the relationship between mitochondrial ADP sensitivity, ROS production, and mitochondrial adaptations to exercise...
March 24, 2018: Mitochondrion
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