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https://www.readbyqxmd.com/read/28806761/transcriptome-analysis-of-pdgfr%C3%AE-cells-identifies-t-type-ca2-channel-cacna1g-as-a-new-pathological-marker-for-pdgfr%C3%AE-cell-hyperplasia
#1
Se Eun Ha, Moon Young Lee, Masaaki Kurahashi, Lai Wei, Brian G Jorgensen, Chanjae Park, Paul J Park, Doug Redelman, Kent C Sasse, Laren S Becker, Kenton M Sanders, Seungil Ro
Platelet-derived growth factor receptor alpha (PDGFRα)+ cells are distributed into distinct morphological groups within the serosal, muscular, and submucosal layers as well as the myenteric and deep muscular plexi. PDGFRα+ cells directly interact with interstitial cells of Cajal (ICC) and smooth muscle cells (SMC) in gastrointestinal smooth muscle tissue. These three cell types, SMC, ICC, and PDGFRα+ cells (SIP cells), form an electrical syncytium, which dynamically regulates gastrointestinal motility. We have previously reported the transcriptomes of SMC and ICC...
2017: PloS One
https://www.readbyqxmd.com/read/28803243/lithium-sensitivity-of-store-operated-ca2-entry-and-survival-of-fibroblasts-isolated-from-chorea-acanthocytosis-patients
#2
Lisann Pelzl, Bhaeldin Elsir, Itishri Sahu, Rosi Bissinger, Yogesh Singh, Basma Sukkar, Sabina Honisch, Ludger Schoels, Mohamed Jemaà, Elisabeth Lang, Alexander Storch, Andreas Hermann, Christos Stournaras, Florian Lang
BACKGROUND: The widely expressed protein chorein fosters activation of the phosphoinositide 3 kinase (PI3K) pathway thus supporting cell survival. Loss of function mutations of the chorein encoding gene VPS13A (vacuolar protein sorting-associated protein 13A) causes chorea-acanthocytosis (ChAc), a neurodegenerative disorder paralleled by deformations of erythrocytes. In mice, genetic knockout of chorein leads to enhanced neuronal apoptosis. PI3K dependent signalling upregulates Orai1, a pore forming channel protein accomplishing store operated Ca2+ entry (SOCE)...
August 11, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28800362/nucleotide-transmitters-atp-and-adp-mediate-intercellular-calcium-wave-communication-via-p2y12-13-receptors-among-bv-2-microglia
#3
Pengchong Jiang, Fulin Xing, Bu Guo, Jianyu Yang, Zheming Li, Wei Wei, Fen Hu, Imshik Lee, Xinzheng Zhang, Leiting Pan, Jingjun Xu
Nerve injury is accompanied by a liberation of diverse nucleotides, some of which act as 'find/eat-me' signals in mediating neuron-glial interplay. Intercellular Ca2+ wave (ICW) communication is the main approach by which glial cells interact and coordinate with each other to execute immune defense. However, the detailed mechanisms on how these nucleotides participate in ICW communication remain largely unclear. In the present work, we employed a mechanical stimulus to an individual BV-2 microglia to simulate localized injury...
2017: PloS One
https://www.readbyqxmd.com/read/28800301/simultaneous-assessment-of-blood-coagulation-and-hematocrit-levels-in-dielectric-blood-coagulometry
#4
Yoshihito Hayashi, Marc-Aurèle Brun, Kenzo Machida, Seungmin Lee, Aya Murata, Shinji Omori, Hidetoshi Uchiyama, Yoshinori Inoue, Toshifumi Kudo, Takahiro Toyofuku, Masayuki Nagasawa, Isao Uchimura, Tomomasa Nakamura, Takeshi Muneta
BACKGROUND: In a whole blood coagulation test, the concentration of any in vitro diagnostic agent in plasma is dependent on the hematocrit level but its impact on the test result is unknown. OBJECTIVE: The aim of this work was to clarify the effects of reagent concentration, particularly Ca2+, and to find a method for hematocrit estimation compatible with the coagulation test. METHODS: Whole blood coagulation tests by dielectric blood coagulometry (DBCM) and rotational thromboelastometry were performed with various concentrations of Ca2+ or on samples with different hematocrit levels...
August 8, 2017: Biorheology
https://www.readbyqxmd.com/read/28799489/toward-enhancing-the-enzymatic-activity-of-a-novel-fungal-polygalacturonase-for-food-industry-optimization-and-biochemical-analyses
#5
Yousseria M H Shetaia, Ashraf F El-Baz, Ahmed M ElMekawy
BACKGROUND: The review of literature and patents shows that enhancing the PG production and activity are still required to fulfill the increasing demands. METHODS: A dual optimization process, which involved Plackett-Burman design (PBD), with seven factors, and response surface methodology, was applied to optimize the production of extracellular polygalacturonase (PG) enzyme produced by a novel strain of Aspergillus flavus isolated from rotten orange fruit. The fungal PG was purified and biochemically characterized...
August 11, 2017: Recent Patents on Biotechnology
https://www.readbyqxmd.com/read/28797310/maternal-intake-of-trans-unsaturated-or-interesterified-fatty-acids-during-pregnancy-and-lactation-modifies-mitochondrial-bioenergetics-in-the-liver-of-adult-offspring-in-mice
#6
Patricia C de Velasco, Gustavo Chicaybam, Dionizio M Ramos-Filho, Raísa M A R Dos Santos, Caroline Mairink, Fátima L C Sardinha, Tatiana El-Bacha, Antonio Galina, Maria das Graças Tavares-do-Carmo
The quality of dietary lipids in the maternal diet can programme the offspring to diseases in later life. We investigated whether the maternal intake of palm oil or interesterified fat, substitutes for trans-unsaturated fatty acids (FA), induces metabolic changes in the adult offspring. During pregnancy and lactation, C57BL/6 female mice received normolipidic diets containing partially hydrogenated vegetable fat rich in trans-unsaturated fatty acids (TG), palm oil (PG), interesterified fat (IG) or soyabean oil (CG)...
July 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28796042/comparative-study-of-ctx-ii-zn2-and-ca2-from-the-urine-for-knee-osteoarthritis-patients-and-healthy-individuals
#7
Linwei Xin, Zhihai Wu, Quanli Qu, Ruiying Wang, Jichun Tang, Lei Chen
The aim of the study was to explore the relationship between the concentration of C-telopeptide fragments of type II collagen (CTX-II), Zn, and Ca in urine and knee osteoarthritis (KOA).Eighty-two patients with KOA and 20 healthy volunteers were enrolled. Anteroposterior and lateral position x-rays of knee joints were collected. The images were classified according to Kellgren-Lawrence radiographic grading criterion. The patients were divided into group grade I, group grade II, group grade III, and grade IV...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28795565/in-vivo-ambient-serotonin-measurements-at-carbon-fiber-microelectrodes
#8
Aya Abdalla, Christopher Wade Atcherley, Pavithra Pathirathna, Srimal Samaranayake, Beidi Qiang, Edsel A Peña, Stephen L Morgan, Michael L Heien, Parastoo Hashemi
The mechanisms that control extracellular serotonin levels in vivo are not well-defined. This shortcoming makes it very challenging to diagnose and treat the many psychiatric disorders in which serotonin is implicated. Fast-scan cyclic voltammetry (FSCV) can measure rapid serotonin release and reuptake events, but cannot report critically important ambient serotonin levels. In this paper, we use fast-scan controlled adsorption voltammetry (FSCAV), to measure serotonin's steady-state, extracellular chemistry...
August 10, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28795233/bicarbonate-transport-during-enamel-maturation
#9
REVIEW
Kaifeng Yin, Michael L Paine
Amelogenesis (tooth enamel formation) is a biomineralization process consisting primarily of two stages (secretory stage and maturation stage) with unique features. During the secretory stage, the inner epithelium of the enamel organ (i.e., the ameloblast cells) synthesizes and secretes enamel matrix proteins (EMPs) into the enamel space. The protein-rich enamel matrix forms a highly organized architecture in a pH-neutral microenvironment. As amelogenesis transitions to maturation stage, EMPs are degraded and internalized by ameloblasts through endosomal-lysosomal pathways...
August 9, 2017: Calcified Tissue International
https://www.readbyqxmd.com/read/28793293/triggering-of-eryptosis-the-suicidal-erythrocyte-death-by-mammalian-target-of-rapamycin-mtor-inhibitor-temsirolimus
#10
Abdulla Al Mamun Bhuyan, Hang Cao, Florian Lang
BACKGROUND/AIMS: The mammalian target of rapamycin (mTOR) inhibitor temsirolimus is utilized for the treatment of malignancy. Temsirolimus is at least in part effective by triggering suicidal tumor cell death. The most common side effect of temsirolimus treatment is anemia. At least in theory, the anemia following temsirolimus treatment could result from stimulation of eryptosis, the suicidal erythrocyte death. Hallmarks of eryptosis include cell shrinkage and cell membrane scrambling with phosphatidylserine translocation to the erythrocyte surface...
July 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28793283/trifluoperazine-induced-suicidal-erythrocyte-death-and-s-nitrosylation-inhibition-reversed-by-the-nitric-oxide-donor-sodium-nitroprusside
#11
Mehrdad Ghashghaeinia, Mauro Carlos Wesseling, Elena Ramos, Polina Petkova-Kirova, Sabrina Waibel, Elisabeth Lang, Rosi Bissinger, Kossai Alzoubi, Baerbel Edelmann, Zohreh Hosseinzadeh, Peter Dreischer, Azam Shahvaroughi-Farahani, Ulrich Mrowietz, Martin Köberle, Lars Kaestner, Ingolf Bernhardt, Antonio Martínez-Ruiz, Thomas Wieder, Florian Lang
BACKGROUND AND PURPOSE: The high potency antipsychotic drug trifluoperazine (10-[3-(4-methyl-1-piperazinyl)-propyl]-2-(trifluoromethyl)-(10)H-phenothiazine dihydrochloride; TFP) may either counteract or promote suicidal cell death or apoptosis. Similar to apoptosis, erythrocytes may enter eryptosis, characterized by phosphatidylserine exposure at the cell surface and cell shrinkage. Eryptosis can be stimulated by an increase in cytoplasmic Ca2+ concentration ([Ca2+]i) and inhibited by nitric oxide (NO)...
August 9, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28793049/possible-mechanisms-involved-in-the-vasorelaxant-effect-produced-by-clobenzorex-in-aortic-segments-of-rats
#12
J Lozano-Cuenca, A González-Hernández, O A López-Canales, J R Villagrana-Zesati, J D Rodríguez-Choreão, R Morín-Zaragoza, E F Castillo-Henkel, J S López-Canales
Clobenzorex is a metabolic precursor of amphetamine indicated for the treatment of obesity. Amphetamines have been involved with cardiovascular side effects such as hypertension and pulmonary arterial hypertension. The aim of the present study was to investigate whether the direct application of 10-9-10-5 M clobenzorex on isolated phenylephrine-precontracted rat aortic rings produces vascular effects, and if so, what mechanisms may be involved. Clobenzorex produced an immediate concentration-dependent vasorelaxant effect at the higher concentrations (10-7...
August 7, 2017: Brazilian Journal of Medical and Biological Research, Revista Brasileira de Pesquisas Médicas e Biológicas
https://www.readbyqxmd.com/read/28792743/a-paradigm-shift-for-preparing-versatile-m2-free-gels-from-unmodified-sodium-alginate
#13
Maria M Pérez-Madrigal, Juan Torras, Jordi Casanovas, Marleen Häring, Carlos Aleman, David Díaz Díaz
This manuscript describes a new route to prepare rapidly Ca2+-free hydrogels from unmodified sodium alginate by simply mixing with small organic molecules such as polycarboxylic acid compounds as cross-linker agents instead of classical divalent metal salts such as CaCl2. DMSO was also found to induce the rapid gelation of aqueous alginate solutions. The gelation process takes place at RT and depending on the composition, gels with good thermal (90-100 °C) and mechanical properties compared to classical metal-containing analogs are obtained...
August 9, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28791865/a-microfluidic-chemical-function-generator-for-probing-dynamic-cell-signaling
#14
Peng Chen, Yiran Guo, Xiaojun Feng, Shuangqian Yan, Jie Wang, Yiwei Li, Wei Du, Bi-Feng Liu
Cellular environments are inherently dynamic and generally involve complex, temporally varying signals. Reconstruction of these environments with high spatial and temporal fidelity and simultaneous imaging of intracellular dynamics in live cells remains a major challenge. In this paper, a microfluidic chemical function generator (μCFG) was proposed for probing cell dynamic signaling with high temporal resolution. By combining a hydrodynamic gating module with a chaotic advection mixing module, the μCFG was able to generate a variety of chemical waveforms, such as digital pulsatile chemical waveforms with a frequency higher than 10 Hz and analog chemical waveforms with a frequency higher than 0...
August 9, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28791416/luteolin-induces-apoptotic-cell-death-via-antioxidant-activity-in-human-colon-cancer-cells
#15
Kyoung Ah Kang, Mei Jing Piao, Yea Seong Ryu, Yu Jae Hyun, Jeong Eon Park, Kristina Shilnikova, Ao Xuan Zhen, Hee Kyoung Kang, Young Sang Koh, Yong Joo Jeong, Jin Won Hyun
The present study determined whether luteolin induces HT-29 colon cancer cell death through an antioxidant effect such as the activation of antioxidant enzymes. Luteolin decreased cell viability in human colon cancer cells (HT-29), whereas it had no effect on normal colon cells (FHC). Luteolin induced apoptosis by activating the mitochondria-mediated caspase pathway in HT-29 cells. Luteolin caused loss of the mitochondrial membrane action potential, increased mitochondrial Ca2+ level, upregulated Bax, downregulated Bcl-2, induced the release of cytochrome c from mitochondria to the cytosol, and increased the levels of the active forms of caspase-9 and caspase-3...
August 2, 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28791397/trpc1-stimulates-calcium%C3%A2-sensing-receptor%C3%A2-induced-store%C3%A2-operated-ca2-entry-and-nitric-oxide-production-in-endothelial-cells
#16
Yuan-Yuan Qu, La-Mei Wang, Hua Zhong, Yong-Min Liu, Na Tang, Li-Ping Zhu, Fang He, Qing-Hua Hu
Store‑operated Ca2+ entry (SOCE) via store‑operated Ca2+ channels (SOCC), encoded by transient receptor potential canonical (TRPC) channel proteins, is an important underlying mechanism regulating intracellular Ca2+ concentration ([Ca2+]i) and various intracellular functions in endothelial cells (ECs). TRPC1, the probable candidate for SOCC, is expressed in ECs. Ca2+‑sensing receptor (CaSR) is functionally expressed in vascular endothelium and is important in Ca2+ mobilization and cardiovascular functions...
August 4, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28790198/neutrophil-activation-of-endothelial-cell-expressed-trpm2-mediates-transendothelial-neutrophil-migration-and-vascular-injury
#17
Manish Mittal, Saroj Nepal, Yoshikazu Tsukasaki, Claudie M Hecquet, Dheeraj Soni, Jalees Rehman, Chinnaswamy Tiruppathi, Asrar B Malik
Rationale: TRPM2 (Transient Receptor Potential Melastatin-2) expressed in endothelial cells (ECs) is a cation channel mediating Ca(2+) entry in response to intracellular generation of adenosine diphosphoribose (ADPR), the TRPM2 ligand. Objective: Because polymorphonuclear leukocytes (PMN) interaction with endothelial cells (ECs) generates ROS, we addressed the possible role of TRPM2 expressed in ECs in the mechanism of transendothelial migration of PMNs. Methods and Results: We observed defective PMN transmigration in response to LPS challenge in adult mice in which the EC expressed TRPM2 is conditionally deleted (Trpm2(iΔEC) )...
August 8, 2017: Circulation Research
https://www.readbyqxmd.com/read/28781760/proteolytic-processing-of-the-l-type-ca-2-%C3%A2-channel-alpha-11-2-subunit-in-neurons
#18
Olivia R Buonarati, Peter B Henderson, Geoffrey G Murphy, Mary C Horne, Johannes W Hell
Background: The L-type Ca2+ channel Cav1.2 is a prominent regulator of neuronal excitability, synaptic plasticity, and gene expression. The central element of Cav1.2 is the pore-forming α 11.2 subunit. It exists in two major size forms, whose molecular masses have proven difficult to precisely determine. Recent work suggests that α 11.2 is proteolytically cleaved between the second and third of its four pore-forming domains (Michailidis et al,. 2014). Methods: To better determine the apparent molecular masses (M R)of the α 11...
2017: F1000Research
https://www.readbyqxmd.com/read/28777829/identification-of-an-early-transcriptomic-signature-of-insulin-resistance-and-related-diseases-in-lymphomonocytes-of-healthy-subjects
#19
Alice Matone, Eleonora Derlindati, Luca Marchetti, Valentina Spigoni, Alessandra Dei Cas, Barbara Montanini, Diego Ardigò, Ivana Zavaroni, Corrado Priami, Riccardo C Bonadonna
Insulin resistance is considered to be a pathogenetic mechanism in several and diverse diseases (e.g. type 2 diabetes, atherosclerosis) often antedating them in apparently healthy subjects. The aim of this study is to investigate with a microarray based approach whether IR per se is characterized by a specific pattern of gene expression. For this purpose we analyzed the transcriptomic profile of peripheral blood mononuclear cells in two groups (10 subjects each) of healthy individuals, with extreme insulin resistance or sensitivity, matched for BMI, age and gender, selected within the MultiKnowledge Study cohort (n = 148)...
2017: PloS One
https://www.readbyqxmd.com/read/28777797/alteration-of-wnt5a-expression-and-of-the-non-canonical-wnt-pcp-and-wnt-pkc-ca2-pathways-in-human-osteoarthritis-osteoblasts
#20
Xavier Martineau, Élie Abed, Johanne Martel-Pelletier, Jean-Pierre Pelletier, Daniel Lajeunesse
OBJECTIVE: Clinical and in vitro studies suggest that subchondral bone sclerosis due to abnormal osteoblasts (Ob) is involved in the progression and/or onset of osteoarthritis (OA). Human Ob isolated from sclerotic subchondral OA bone tissue show an altered phenotype, a decreased canonical Wnt/β-catenin signaling pathway (cWnt), and a reduced mineralization in vitro. In addition to the cWnt pathway, at least two non-canonical signaling pathways, the Wnt/PKC and Wnt/PCP pathway have been described...
2017: PloS One
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