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https://www.readbyqxmd.com/read/30209404/marcks-regulates-tonic-and-chronic-active-b-cell-receptor-signaling
#1
Chenguang Xu, Yan Fang, Zhiyong Yang, Yukai Jing, Yonghui Zhang, Chaohong Liu, Wanli Liu
Tonic or chronic active B-cell receptor (BCR) signaling is essential for the survival of normal or some malignant B cells, respectively. However, the molecular mechanism regulating the strength of these two types of BCR signaling remains unknown. Here, using high-speed high-resolution single-molecule tracking in live cells, we identified that PKCβ, STIM1, and IP3R1/2/3 molecules affected the lateral Brownian mobile behavior of BCRs on the plasma membrane of quiescent B cells, which was correlated to the strength of BCR signaling...
September 12, 2018: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29800586/memantine-can-improve-chronic-ethanol-exposure-induced-spatial-memory-impairment-in-male-c57bl-6-mice-by-reducing-hippocampal-apoptosis
#2
Xiaolong Wang, Hao Yu, Jiabin You, Changliang Wang, Chunmei Feng, Zhaodi Liu, Ya Li, Rucheng Wei, Siqi Xu, Rui Zhao, Xu Wu, Guohua Zhang
Chronic ethanol intake can induce neuronal apoptosis, leading to dementia. We investigated the protective effects of memantine on spatial memory impairment induced by chronic ethanol exposure in mice. Male C57BL/6 mice were administered 10% (m/V) or 20% (m/V) ethanol as the only choice of drinking water. Mice were treated for 60 d, 90 d, or 180 d. Mice were treated with memantine for the same duration (daily 10 mg/kg oral). The Morris water maze and radial arm maze test were used to measure spatial memory...
August 1, 2018: Toxicology
https://www.readbyqxmd.com/read/29388468/plc%C3%AE-1-pkc%C3%AE%C2%B5-ip-3-r1-signaling-plays-an-important-role-in-hypoxia-induced-calcium-response-in-pulmonary-artery-smooth-muscle-cells
#3
Vishal R Yadav, Tengyao Song, Lin Mei, Leroy Joseph, Yun-Min Zheng, Yong-Xiao Wang
Hypoxia-induced pulmonary vasoconstriction (HPV) is attributed to an increase in intracellular Ca2+ concentration ([Ca2+ ]i ) in pulmonary artery smooth muscle cells (PASMCs). We have reported that phospholipase C-γ1 (PLCγ1) plays a significant role in the hypoxia-induced increase in [Ca2+ ]i in PASMCs and attendant HPV. In this study, we intended to determine molecular mechanisms for hypoxic Ca2+ and contractile responses in PASMCs. Our data reveal that hypoxic vasoconstriction occurs in pulmonary arteries, but not in mesenteric arteries...
May 1, 2018: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/29357415/interfering-rna-against-pkc-%C3%AE-inhibits-tnf-%C3%AE-induced-ip-3-r1-expression-and-improves-glomerular-filtration-rate-in-rats-with-fulminant-hepatic-failure
#4
Dong-Lei Wang, Wen-Ying Dai, Wen Wang, Ying Wen, Ying Zhou, Yi-Tong Zhao, Jian Wu, Pei Liu
We have reported that tumor necrosis factor-α (TNF-α) is critical for reduction of glomerular filtration rate (GFR) in rats with fulminant hepatic failure (FHF). The present study aims to evaluate the underlying mechanisms of decreased GFR during acute hepatic failure. Rats with FHF induced by d-galactosamine plus lipopolysaccharide (GalN/LPS) were injected intravenously with recombinant lentivirus harboring short hairpin RNA against the protein kinase C-α ( PKC-α) gene (Lenti-shRNA-PKC-α). GFR, serum levels of aminotransferases, creatinine, urea nitrogen, potassium, sodium, chloride, TNF-α, and endothelin-1 (ET-1), as well as type 1 inositol 1,4,5-trisphosphate receptor (IP3 R1) expression in renal tissue were assessed...
May 1, 2018: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/29212023/disc1-modulates-neuronal-stress-responses-by-gate-keeping-er-mitochondria-ca-2-transfer-through-the-mam
#5
Sung Jin Park, Su Been Lee, Yeongjun Suh, Su-Jeong Kim, Namgyu Lee, Ji-Ho Hong, Cana Park, Youngsik Woo, Koko Ishizuka, Joung-Hun Kim, Per-Olof Berggren, Akira Sawa, Sang Ki Park
A wide range of Ca2+ -mediated functions are enabled by the dynamic properties of Ca2+ , all of which are dependent on the endoplasmic reticulum (ER) and mitochondria. Disrupted-in-schizophrenia 1 (DISC1) is a scaffold protein that is involved in the function of intracellular organelles and is linked to cognitive and emotional deficits. Here, we demonstrate that DISC1 localizes to the mitochondria-associated ER membrane (MAM). At the MAM, DISC1 interacts with IP3 R1 and downregulates its ligand binding, modulating ER-mitochondria Ca2+ transfer through the MAM...
December 5, 2017: Cell Reports
https://www.readbyqxmd.com/read/29186133/mutational-analysis-of-itpr1-in-a-taiwanese-cohort-with-cerebellar-ataxias
#6
Cheng-Tsung Hsiao, Yo-Tsen Liu, Yi-Chu Liao, Ting-Yi Hsu, Yi-Chung Lee, Bing-Wen Soong
BACKGROUND: The inositol 1,4,5-triphosphate (IP3) receptor type 1 gene (ITPR1) encodes the IP3 receptor type 1 (IP3R1), which modulates intracellular calcium homeostasis and signaling. Mutations in ITPR1 have been implicated in inherited cerebellar ataxias. The aim of this study was to investigate the role of ITPR1 mutations, including both large segmental deletion and single nucleotide mutations, in a Han Chinese cohort with inherited cerebellar ataxias in Taiwan. METHODOLOGY AND PRINCIPAL FINDINGS: Ninety-three unrelated individuals with molecularly unassigned spinocerebellar ataxia selected from 585 pedigrees with autosomal dominant cerebellar ataxias, were recruited into the study with elaborate clinical evaluations...
2017: PloS One
https://www.readbyqxmd.com/read/29069790/downregulation-of-type-3-inositol-1-4-5-trisphosphate-receptor-decreases-breast-cancer-cell-migration-through-an-oscillatory-ca-2-signal
#7
Abdallah Mound, Alexia Vautrin-Glabik, Arthur Foulon, Béatrice Botia, Frédéric Hague, Jan B Parys, Halima Ouadid-Ahidouch, Lise Rodat-Despoix
Breast cancer remains a research priority due to its invasive phenotype. Although the role of ion channels in cancer is now well established, the role of inositol (1,4,5)-trisphosphate (IP3 ) receptors (IP3 Rs) remains enigmatic. If the three IP3 Rs subtypes expression have been identified in various cancers, little is known about their physiological role. Here, we investigated the involvement of IP3 R type 3 (IP3 R3 ) in the migration processes of three human breast cancer cell lines showing different migration velocities: the low-migrating MCF-7 and the highly migrating and invasive MDA-MB-231 and MDA-MB-435S cell lines...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/29054453/disruption-of-dopamine-d1-d2-receptor-complex-is-involved-in-the-function-of-haloperidol-in-cardiac-h9c2-cells
#8
L Lencesova, I Szadvari, P Babula, J Kubickova, B Chovancova, K Lopusna, I Rezuchova, Z Novakova, O Krizanova, M Novakova
AIMS: Haloperidol is an antipsychotic agent and acts as dopamine D2 receptor (D2R) antagonist, as a prototypical ligand of sigma1 receptors (Sig1R) and it increases expression of type 1 IP3 receptors (IP3 R1). However, precise mechanism of haloperidol action on cardiomyocytes through dopaminergic signaling was not described yet. This study investigated a role of dopamine receptors in haloperidol-induced increase in IP3 R1 and Sig1R, and compared physiological effect of melperone and haloperidol on basic heart parameters in rats...
December 15, 2017: Life Sciences
https://www.readbyqxmd.com/read/29042597/herpud1-negatively-regulates-pathological-cardiac-hypertrophy-by-inducing-ip3-receptor-degradation
#9
Natalia Torrealba, Mario Navarro-Marquez, Valeria Garrido, Zully Pedrozo, Diego Romero, Yuka Eura, Elisa Villalobos, Juan Carlos Roa, Mario Chiong, Koichi Kokame, Sergio Lavandero
Cardiac hypertrophy is an adaptive response triggered by pathological stimuli. Regulation of the synthesis and the degradation of the Ca2+ channel inositol 1,4,5-trisphosphate receptor (IP3R) affects progression to cardiac hypertrophy. Herpud1, a component of the endoplasmic reticulum-associated degradation (ERAD) complex, participates in IP3R1 degradation and Ca2+ signaling, but the cardiac function of Herpud1 remains unknown. We hypothesize that Herpud1 acts as a negative regulator of cardiac hypertrophy by regulating IP3R protein levels...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29024661/paclitaxel-reduces-axonal-bclw-to-initiate-ip-3-r1-dependent-axon-degeneration
#10
Sarah E Pease-Raissi, Maria F Pazyra-Murphy, Yihang Li, Franziska Wachter, Yusuke Fukuda, Sara J Fenstermacher, Lauren A Barclay, Gregory H Bird, Loren D Walensky, Rosalind A Segal
Chemotherapy-induced peripheral neuropathy (CIPN) is a debilitating side effect of many cancer treatments. The hallmark of CIPN is degeneration of long axons required for transmission of sensory information; axonal degeneration causes impaired tactile sensation and persistent pain. Currently the molecular mechanisms of CIPN are not understood, and there are no available treatments. Here we show that the chemotherapeutic agent paclitaxel triggers CIPN by altering IP3 receptor phosphorylation and intracellular calcium flux, and activating calcium-dependent calpain proteases...
October 11, 2017: Neuron
https://www.readbyqxmd.com/read/28962833/cell-micropatterning-reveals-the-modulatory-effect-of-cell-shape-on-proliferation-through-intracellular-calcium-transients
#11
Jie Tong, Ying Qi, Xiangmiao Wang, Liyin Yu, Chang Su, Wenjun Xie, Jianbao Zhang
The mechanism by which cell shape regulates the function of the cell is one of the most important biological issues, but it remains unclear. Here, we investigated the effect of the regulation of cell shape on proliferation by using a micropatterning approach to confine MC3T3-E1 cells into specific shapes. Our results show that the proliferation rate for rectangle-, triangle-, square- and circle-shaped osteoblasts increased sequentially and was related to the nuclear shape index (NSI) but not the cell shape index (CSI)...
December 2017: Biochimica et biophysica acta. Molecular cell research
https://www.readbyqxmd.com/read/28833478/melatonin-improves-the-fertilization-capacity-and-developmental-ability-of-bovine-oocytes-by-regulating-cytoplasmic-maturation-events
#12
Xue-Ming Zhao, Na Wang, Hai-Sheng Hao, Chong-Yang Li, Ya-Han Zhao, Chang-Liang Yan, Hao-Yu Wang, Wei-Hua Du, Dong Wang, Yan Liu, Yun-Wei Pang, Hua-Bin Zhu
Melatonin is a well-characterized antioxidant that has been successfully used to protect oocytes from reactive oxygen species during in vitro maturation (IVM), resulting in improved fertilization capacity and development ability. However, the mechanism via which melatonin improves oocyte fertilization capacity and development ability remains to be determined. Here, we studied the effects of melatonin on cytoplasmic maturation of bovine oocytes. In the present study, bovine oocytes were cultured in IVM medium supplemented with 0, 10-7 , 10-9 , and 10-11  mol/L melatonin, and the cytoplasmic maturation parameters of MII oocytes after IVM were investigated, including redistribution of organelles (mitochondria, cortical granules [CGs], and endoplasmic reticulum [ER]), intracellular glutathione (GSH) and ATP levels, expression of endogenous antioxidant genes (Cat, Sod1, and GPx), and fertilization-related events (IP3R1 distribution and expression of CD9 and Juno)...
January 2018: Journal of Pineal Research
https://www.readbyqxmd.com/read/28786032/haloperidol-affects-plasticity-of-differentiated-ng-108-cells-through-%C3%AF-1r-ip-3-r1-complex
#13
Jana Kubickova, Lubomira Lencesova, Lucia Csaderova, Tibor Stracina, Sona Hudecova, Petr Babula, Eva Rozborilova, Marie Novakova, Olga Krizanova
Haloperidol is an antipsychotic agent that primarily acts as an antagonist of D2 dopamine receptors. Besides other receptor systems, it targets sigma 1 receptors (σ1Rs) and inositol 1,4,5-trisphosphate receptors (IP3 Rs). Aim of this work was to investigate possible changes in IP3 Rs and σ1Rs resulting from haloperidol treatment and to propose physiological consequences in differentiated NG-108 cells, i.e., effect on cellular plasticity. Haloperidol treatment resulted in up-regulation of both type 1 IP3 Rs (IP3 R1s) and σ1Rs at mRNA and protein levels...
January 2018: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28781772/enriched-endoplasmic-reticulum-mitochondria-interactions-result-in-mitochondrial-dysfunction-and-apoptosis-in-oocytes-from-obese-mice
#14
Lihong Zhao, Tengfei Lu, Lei Gao, Xiangwei Fu, Shien Zhu, Yunpeng Hou
BACKGROUND: Maternal obesity alters oocytes and subsequent fetal metabolism. An increasing number of studies have shown that the endoplasmic reticulums (ER) or mitochondria have important effects on oocyte quality, but there has been no study of the effect of mitochondria-associated ER membranes (MAMs) on oocyte quality. The present study was designed to assess whether the level of MAM and MAM-related proteins were different in oocytes from obese and control mice. RESULTS: First, oocytes from mice with high-fat-diet (HFD)-induced obesity had higher levels (either greater numbers or a higher proportion for the same numbers) of MAM than oocytes from control mice...
2017: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/28730337/memantine-can-reduce-ethanol-induced-caspase-3-activity-and-apoptosis-in-h4-cells-by-decreasing-intracellular-calcium
#15
Xiaolong Wang, Jiajun Chen, Hongbo Wang, Hao Yu, Changliang Wang, Jiabin You, Pengfei Wang, Chunmei Feng, Guohui Xu, Xu Wu, Rui Zhao, Guohua Zhang
Caspase-3 activation and apoptosis are associated with various neurodegenerative disorders. Calcium activation is an important factor in promoting apoptosis. We, therefore, assessed the role of intracellular calcium in ethanol-induced activation of caspase-3 in H4 human neuroglioma cells and the protective effect of the NMDA receptor antagonist, memantine, on ethanol-induced apoptosis in H4 cells. H4 cells were treated with 100 mM EtOH (in culture medium) for 2 days. For interaction studies, cells were treated with memantine (4 μM), EDTA (1 mM), or BAPTA-AM (10 μM) before treatment with EtOH...
August 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28620198/hydrogen-gas-protects-ip3rs-by-reducing-disulfide-bridges-in-human-keratinocytes-under-oxidative-stress
#16
Ching-Ying Wu, Wen-Li Hsu, Ming-Hsien Tsai, Jui-Lin Liang, Jian-He Lu, Chia-Jung Yen, Hsin-Su Yu, Mami Noda, Chi-Yu Lu, Chu-Huang Chen, Shian-Jang Yan, Tohru Yoshioka
Based on the oxidative stress theory, aging derives from the accumulation of oxidized proteins induced by reactive oxygen species (ROS) in the cytoplasm. Hydrogen peroxide (H2O2) elicits ROS that induces skin aging through oxidation of proteins, forming disulfide bridges with cysteine or methionine sulfhydryl groups. Decreased Ca(2+) signaling is observed in aged cells, probably secondary to the formation of disulfide bonds among Ca(2+) signaling-related proteins. Skin aging processes are modeled by treating keratinocytes with H2O2...
June 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28607044/regulation-of-spinogenesis-in-mature-purkinje-cells-via-mglur-pkc-mediated-phosphorylation-of-camkii%C3%AE
#17
Takeyuki Sugawara, Chihiro Hisatsune, Hiroyuki Miyamoto, Naoko Ogawa, Katsuhiko Mikoshiba
Dendritic spines of Purkinje cells form excitatory synapses with parallel fiber terminals, which are the primary sites for cerebellar synaptic plasticity. Nevertheless, how density and morphology of these spines are properly maintained in mature Purkinje cells is not well understood. Here we show an activity-dependent mechanism that represses excessive spine development in mature Purkinje cells. We found that CaMKIIβ promotes spine formation and elongation in Purkinje cells through its F-actin bundling activity...
June 27, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28598420/tespa1-regulates-t-cell-receptor-induced-calcium-signals-by-recruiting-inositol-1-4-5-trisphosphate-receptors
#18
Jingjing Liang, Jun Lyu, Meng Zhao, Dan Li, Mingzhu Zheng, Yan Fang, Fangzhu Zhao, Jun Lou, Chuansheng Guo, Lie Wang, Di Wang, Wanli Liu, Linrong Lu
Thymocyte-expressed, positive selection-associated 1 (Tespa1) is important in T cell receptor (TCR)-driven thymocyte development. Downstream of the TCR, Tespa1 is a crucial component of the linker for activation of T cells (LAT) signalosome, facilitating calcium signalling and subsequent MAPK activation. However, it is unknown how Tespa1 elicits calcium signalling. Here, we show that inositol 1,4,5-trisphosphate receptor type 1 (IP3R1) is crucial for Tespa1-optimized, TCR-induced Ca2+ flux and thymocyte development...
June 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28554312/calcium-signaling-pkc-gamma-ip3r1-and-car8-link-spinocerebellar-ataxias-and-purkinje-cell-dendritic-development
#19
REVIEW
Etsuko Shimobayashi, Josef P Kapfhammer
BACKGROUND: Spinocerebellar ataxias (SCAs) are a group of cerebellar diseases characterized by progressive ataxia and cerebellar atrophy. Several forms of SCAs are caused by missense mutations or deletions in genes related to calcium signaling in Purkinje cells. Among them, spinocerebellar ataxia type 14 (SCA14) is caused by missense mutations in PRKCG gene which encodes protein kinase C gamma (PKCγ). It is remarkable that in several cases in which SCA is caused by point mutations in an individual gene, the affected genes are involved in the PKCγ signaling pathway and calcium signaling which is not only crucial for proper Purkinje cell function but is also involved in the control of Purkinje cell dendritic development...
January 30, 2018: Current Neuropharmacology
https://www.readbyqxmd.com/read/28526746/region-specific-proteolysis-differentially-regulates-type-1-inositol-1-4-5-trisphosphate-receptor-activity
#20
COMPARATIVE STUDY
Liwei Wang, Larry E Wagner, Kamil J Alzayady, David I Yule
The inositol 1,4,5 trisphosphate receptor (IP3 R) is an intracellular Ca2+ release channel expressed predominately on the membranes of the endoplasmic reticulum. IP3 R1 can be cleaved by caspase or calpain into at least two receptor fragments. However, the functional consequences of receptor fragmentation are poorly understood. Our previous work has demonstrated that IP3 R1 channels, formed following either enzymatic fragmentation or expression of the corresponding complementary polypeptide chains, retain tetrameric architecture and are still activated by IP3 binding despite the loss of peptide continuity...
July 14, 2017: Journal of Biological Chemistry
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