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Torne-Srivastava T, Grunwald Y, Dalal A, Yaaran A, Moshelion M, Moran N. A tale of two pumps: Blue light and abscisic acid alter Arabidopsis leaf hydraulics via bundle sheath cell H + -ATPases. Plant Physiol 2024:kiae226. [PMID: 38652805 DOI: 10.1093/plphys/kiae226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/21/2024] [Accepted: 03/23/2024] [Indexed: 04/25/2024]
Abstract
The bundle sheath cell (BSC) layer tightly enveloping the xylem throughout the leaf is recognized as a major signal-perceiving "valve" in series with stomata, regulating leaf hydraulic conductance (Kleaf) and thereby radial water flow via the transpiring leaf. The BSC blue light (BL) signaling pathway increases Kleaf and the underlying BSC water permeability. Here, we explored the hypothesis that BSCs also harbor a Kleaf-downregulating signaling pathway related to the stress phytohormone abscisic acid (ABA). We employed fluorescence imaging of xylem sap in detached leaves and BSC protoplasts from different genotypes of Arabidopsis (Arabidopsis thaliana) plants, using pH and membrane potential probes to monitor physiological responses to ABA and BL in combination with pharmacological agents. We found that BL-enhanced Kleaf required elevated BSC cytosolic Ca2+. ABA inhibited BL-activated xylem-sap-acidifying BSC H + -ATPase AHA2 (Arabidopsis H + -ATPase 2), resulting in depolarized BSCs and alkalinized xylem sap. ABA also stimulated BSC vacuolar H + -ATPase (VHA), which alkalinized the BSC cytosol. Each pump stimulation, AHA2 by BL and VHA by ABA (under BL), also required Ca2+. ABA stimulated VHA in the dark depending on Ca2+, but only in an alkaline external medium. Taken together with earlier findings on the pH sensitivity of BSC osmotic water permeability (i.e., aquaporin activity), our results suggest a Ca2+-dependent and pH-mediated causative link between the BL- and ABA-regulated activities of two BSC H + -ATPases and Kleaf.
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Affiliation(s)
- Tanmayee Torne-Srivastava
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, the Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Yael Grunwald
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, the Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Ahan Dalal
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, the Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Adi Yaaran
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, the Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Menachem Moshelion
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, the Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, Rehovot 76100, Israel
| | - Nava Moran
- The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, the Robert H. Smith Faculty of Agriculture, Food and Environment, the Hebrew University of Jerusalem, Rehovot 76100, Israel
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Meddya S, Meshram S, Sarkar D, S R, Datta R, Singh S, Avinash G, Kumar Kondeti A, Savani AK, Thulasinathan T. Plant Stomata: An Unrealized Possibility in Plant Defense against Invading Pathogens and Stress Tolerance. Plants (Basel) 2023; 12:3380. [PMID: 37836120 PMCID: PMC10574665 DOI: 10.3390/plants12193380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/12/2023] [Accepted: 09/12/2023] [Indexed: 10/15/2023]
Abstract
Stomata are crucial structures in plants that play a primary role in the infection process during a pathogen's attack, as they act as points of access for invading pathogens to enter host tissues. Recent evidence has revealed that stomata are integral to the plant defense system and can actively impede invading pathogens by triggering plant defense responses. Stomata interact with diverse pathogen virulence factors, granting them the capacity to influence plant susceptibility and resistance. Moreover, recent studies focusing on the environmental and microbial regulation of stomatal closure and opening have shed light on the epidemiology of bacterial diseases in plants. Bacteria and fungi can induce stomatal closure using pathogen-associated molecular patterns (PAMPs), effectively preventing entry through these openings and positioning stomata as a critical component of the plant's innate immune system; however, despite this defense mechanism, some microorganisms have evolved strategies to overcome stomatal protection. Interestingly, recent research supports the hypothesis that stomatal closure caused by PAMPs may function as a more robust barrier against pathogen infection than previously believed. On the other hand, plant stomatal closure is also regulated by factors such as abscisic acid and Ca2+-permeable channels, which will also be discussed in this review. Therefore, this review aims to discuss various roles of stomata during biotic and abiotic stress, such as insects and water stress, and with specific context to pathogens and their strategies for evading stomatal defense, subverting plant resistance, and overcoming challenges faced by infectious propagules. These pathogens must navigate specific plant tissues and counteract various constitutive and inducible resistance mechanisms, making the role of stomata in plant defense an essential area of study.
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Affiliation(s)
- Sandipan Meddya
- School of Agriculture, Lovely Professional University, Phagwara 144411, India
| | - Shweta Meshram
- School of Agriculture, Lovely Professional University, Phagwara 144411, India
| | - Deepranjan Sarkar
- Department of Agriculture, Integral Institute of Agricultural Science and Technology, Integral University, Lucknow 226026, India;
| | - Rakesh S
- Department of Soil Science and Agricultural Chemistry, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar 736165, India;
| | - Rahul Datta
- Department of Geology and Pedology, Faculty of Forestry and Wood Technology, Mendel University in Brno, 61300 Brno, Czech Republic;
| | - Sachidanand Singh
- Department of Biotechnology, Smt. S. S. Patel Nootan Science and Commerce College, Sankalchand Patel University, Visnagar 384315, India;
| | - Gosangi Avinash
- Department of Biochemistry, Punjab Agricultural University, Ludhiana 141027, India;
| | - Arun Kumar Kondeti
- Department of Agronomy, Acharya N.G. Ranga Agricultural University, Regional Agricultural Research Station, Nandyal 518502, India;
| | - Ajit Kumar Savani
- Department of Plant Pathology, Assam Agricultural University, Jorhat 785013, India;
| | - Thiyagarajan Thulasinathan
- Department of Plant Biotechnology, Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore 641003, India;
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Del Pino AM, Regni L, D’Amato R, Di Michele A, Proietti P, Palmerini CA. Persistence of the Effects of Se-Fertilization in Olive Trees over Time, Monitored with the Cytosolic Ca 2+ and with the Germination of Pollen. Plants (Basel) 2021; 10:plants10112290. [PMID: 34834652 PMCID: PMC8624298 DOI: 10.3390/plants10112290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/19/2021] [Accepted: 10/20/2021] [Indexed: 05/13/2023]
Abstract
Selenium (Se) is an important micronutrient for living organisms, since it is involved in several physiological and metabolic processes. Biofortification with Se increases the nutritional and qualitative values of foods in Se-deficient regions and increases tolerance to oxidative stress in olive trees. Many studies have shown that Se, in addition to improving the qualitative and nutritional properties of EVO oil, also improves the plant's response to abiotic stress. This study addressed this issue by monitoring the effects of Se on cytosolic Ca2+ and on the germination of olive pollen grains in oxidative stress. The olive trees subjected to treatment with Na-selenate in the field produced pollen with a Se content 6-8 times higher than the controls, even after 20 months from the treatment. Moreover, part of the micronutrient was organic in selenium methionine. The higher selenium content did not produce toxic effects in the pollen, rather it antagonized the undesirable effects of oxidative stress in the parameters under study. The persistence of the beneficial effects of selenium observed over time in pollens, in addition to bringing out an undisputed adaptability of olive trees to the micronutrient, suggested the opportunity to reduce the number of treatments in the field.
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Affiliation(s)
- Alberto Marco Del Pino
- Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy; (A.M.D.P.); (R.D.); (C.A.P.)
| | - Luca Regni
- Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy; (A.M.D.P.); (R.D.); (C.A.P.)
- Correspondence: (L.R.); (P.P.)
| | - Roberto D’Amato
- Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy; (A.M.D.P.); (R.D.); (C.A.P.)
| | - Alessandro Di Michele
- Department of Physics and Geology, University of Perugia, Via Pascoli, 06123 Perugia, Italy;
| | - Primo Proietti
- Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy; (A.M.D.P.); (R.D.); (C.A.P.)
- Correspondence: (L.R.); (P.P.)
| | - Carlo Alberto Palmerini
- Department of Agricultural, Food and Environmental Sciences (DSA3), University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy; (A.M.D.P.); (R.D.); (C.A.P.)
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Abstract
Ryanodine receptors (RyRs) are intracellular Ca2+ release channels ubiquitously expressed in various cell types. RyRs were extensively studied in striated muscle cells due to their crucial role in muscle contraction. In contrast, the role of RyRs in Ca2+ signalling and functions in non-excitable cells, such as T lymphocytes, remains poorly understood. Expression of different isoforms of RyRs was shown in primary T cells and T cell lines. In T cells, RyRs co-localize with the plasmalemmal store-operated Ca2+ channels of the Orai family and endoplasmic reticulum Ca2+ sensing Stim family proteins and are activated by store-operated Ca2+ entry and pyridine nucleotide metabolites, the intracellular second messengers generated upon stimulation of T cell receptors. Experimental data indicate that together with d-myo-inositol 1,4,5-trisphosphate receptors, RyRs regulate intercellular Ca2+ dynamics by controlling Ca2+ concentration within the lumen of the endoplasmic reticulum and, consequently, store-operated Ca2+ entry. Gain-of-function mutations, genetic deletion or pharmacological inhibition of RyRs alters T cell Ca2+ signalling and effector functions. The picture emerging from the collective data shows that RyRs are the essential regulators of T cell Ca2+ signalling and can be potentially used as molecular targets for immunomodulation or T cell-based diagnostics of the disorders associated with RyRs dysregulation.
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Affiliation(s)
- Alla F Fomina
- Department of Physiology and Membrane Biology, University of California, Davis, CA, USA
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Park JH, Jeong SY, Choi JH, Lee EH. Pathological Mechanism of a Constitutively Active Form of Stromal Interaction Molecule 1 in Skeletal Muscle. Biomolecules 2021; 11:biom11081064. [PMID: 34439731 PMCID: PMC8394508 DOI: 10.3390/biom11081064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 07/14/2021] [Accepted: 07/19/2021] [Indexed: 11/30/2022] Open
Abstract
Stromal interaction molecule 1 (STIM1) is the main protein that, along with Orai1, mediates store-operated Ca2+ entry (SOCE) in skeletal muscle. Abnormal SOCE due to mutations in STIM1 is one of the causes of human skeletal muscle diseases. STIM1-R304Q (a constitutively active form of STIM1) has been found in human patients with skeletal muscle phenotypes such as muscle weakness, myalgia, muscle stiffness, and contracture. However, the pathological mechanism(s) of STIM1-R304Q in skeletal muscle have not been well studied. To examine the pathological mechanism(s) of STIM1-R304Q in skeletal muscle, STIM1-R304Q was expressed in mouse primary skeletal myotubes, and the properties of the skeletal myotubes were examined using single-myotube Ca2+ imaging, transmission electron microscopy (TEM), and biochemical approaches. STIM1-R304Q did not interfere with the terminal differentiation of skeletal myoblasts to myotubes and retained the ability of STIM1 to attenuate dihydropyridine receptor (DHPR) activity. STIM1-R304Q induced hyper-SOCE (that exceeded the SOCE by wild-type STIM1) by affecting both the amplitude and the onset rate of SOCE. Unlike that by wild-type STIM1, hyper-SOCE by STIM1-R304Q contributed to a disturbance in Ca2+ distribution between the cytosol and the sarcoplasmic reticulum (SR) (high Ca2+ in the cytosol and low Ca2+ in the SR). Moreover, the hyper-SOCE and the high cytosolic Ca2+ level induced by STIM1-R304Q involve changes in mitochondrial shape. Therefore, a series of these cellular defects induced by STIM1-R304Q could induce deleterious skeletal muscle phenotypes in human patients carrying STIM1-R304Q.
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Affiliation(s)
- Ji Hee Park
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (J.H.P.); (S.Y.J.); (J.H.C.)
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Korea
| | - Seung Yeon Jeong
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (J.H.P.); (S.Y.J.); (J.H.C.)
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Korea
| | - Jun Hee Choi
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (J.H.P.); (S.Y.J.); (J.H.C.)
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Korea
| | - Eun Hui Lee
- Department of Physiology, College of Medicine, The Catholic University of Korea, Seoul 06591, Korea; (J.H.P.); (S.Y.J.); (J.H.C.)
- Department of Biomedicine & Health Sciences, Graduate School, The Catholic University of Korea, Seoul 06591, Korea
- Correspondence:
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Qi R, Kang Y, Li X, Zhang X, Han Y, Cai R, Gao Y, Qi Y. Forsythiasides-Rich Extract From Forsythiae Fructus Inhibits Mast Cell Degranulation by Enhancing Mitochondrial Ca 2+ Uptake. Front Pharmacol 2021; 12:696729. [PMID: 34194333 PMCID: PMC8237228 DOI: 10.3389/fphar.2021.696729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 06/02/2021] [Indexed: 11/13/2022] Open
Abstract
Mast cells (MCs) activated via IgE/FcεRI or MAS-related G protein coupled receptor (Mrgpr)-mediated pathway can release granules that play prominent roles in hypersensitivity reactions. Forsythiae Fructus, a well-known traditional Chinese medicine, has been clinically used for allergic diseases. Although previous studies indicated that Forsythiae Fructus extract inhibited compound 48/80-induced histamine release from MCs, its effect on IgE-dependent MC degranulation and possible underlying mechanisms remain to be explored. Herein, we prepared the forsythiasides-rich extract (FRE) and investigated its action on MC degranulation and explored its underlying mechanism. Our data showed that FRE could dampen IgE/FcεRI- and Mrgpr-mediated MC degranulation in vitro and in vivo. Mechanism study indicated that FRE decreased cytosolic Ca2+ (Ca2+[c]) level rapidly and reversibly. Moreover, FRE decreased Ca2+[c] of MCs independent of plasma membrane Ca2+-ATPase (PMCA), sarco/endoplasmic Ca2+-ATPase (SERCA) and Na+/Ca2+ exchanger (NCX). While, along with Ca2+[c] decrease, the increase of mitochondrial Ca2+ (Ca2+[m]) occurred simultaneously in FRE-treated RBL-2H3 cells. In the isolated mitochondria, FRE also promoted the subcellular organelle to uptake more extramitochondrial Ca2+. In conclusion, by increasing Ca2+[m] uptake, FRE decreases Ca2+[c] level to suppress MC degranulation. Our findings may provide theoretical support for the clinical application of Forsythiae Fructus on allergy and other MC-involved diseases.
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Affiliation(s)
- Ruijuan Qi
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yuan Kang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Ximeng Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xiaoyu Zhang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yixin Han
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Runlan Cai
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yuan Gao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yun Qi
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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Kim DH, Kim JH, Hwangbo H, Kim SY, Ji SY, Kim MY, Cha HJ, Park C, Hong SH, Kim GY, Park SK, Jeong JW, Kim MY, Choi YH, Lee H. Spermidine Attenuates Oxidative Stress-Induced Apoptosis via Blocking Ca 2+ Overload in Retinal Pigment Epithelial Cells Independently of ROS. Int J Mol Sci 2021; 22:ijms22031361. [PMID: 33572992 PMCID: PMC7866386 DOI: 10.3390/ijms22031361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 02/06/2023] Open
Abstract
Retinal pigment epithelial (RPE) cells occupy the outer layer of the retina and perform various biological functions. Oxidative damage to RPE cells is a major risk factor for retinal degeneration that ultimately leads to vision loss. In this study, we investigated the role of spermidine in a hydrogen peroxide (H2O2)-induced oxidative stress model using human RPE cells. Our findings showed that 300 μM H2O2 increased cytotoxicity, apoptosis, and cell cycle arrest in the G2/M phase, whereas these effects were markedly suppressed by 10 μM spermidine. Furthermore, spermidine significantly reduced H2O2-induced mitochondrial dysfunction including mitochondrial membrane potential and mitochondrial activity. Although spermidine displays antioxidant properties, the generation of intracellular reactive oxygen species (ROS) upon H2O2 insult was not regulated by spermidine. Spermidine did suppress the increase in cytosolic Ca2+ levels resulting from endoplasmic reticulum stress in H2O2-stimulated human RPE cells. Treatment with a cytosolic Ca2+ chelator markedly reversed H2O2-induced cellular dysfunction. Overall, spermidine protected against H2O2-induced cellular damage by blocking the increase of intracellular Ca2+ independently of ROS. These results suggest that spermidine protects RPE cells from oxidative stress, which could be a useful treatment for retinal diseases.
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Affiliation(s)
- Da Hye Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Jeong-Hwan Kim
- Research and Development Department, BGN CARE Co., Ltd., Busan 47195, Korea; (J.-H.K.); (S.-K.P.); (M.-Y.K.)
| | - Hyun Hwangbo
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - So Young Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Seon Yeong Ji
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Min Yeong Kim
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea;
| | - Cheol Park
- Department of Molecular Biology, College of Natural Sciences, Dong-eui University, Busan 47340, Korea;
| | - Su Hyun Hong
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
| | - Gi-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Korea;
| | - Seh-Kwang Park
- Research and Development Department, BGN CARE Co., Ltd., Busan 47195, Korea; (J.-H.K.); (S.-K.P.); (M.-Y.K.)
- BGN Eye Clinic, Seoul 05551, Korea
| | | | - Mi-Young Kim
- Research and Development Department, BGN CARE Co., Ltd., Busan 47195, Korea; (J.-H.K.); (S.-K.P.); (M.-Y.K.)
| | - Yung Hyun Choi
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
- Correspondence: (Y.H.C.); (H.L.); Tel.: +82-51-890-3319 (Y.H.C.); +82-51-890-3315 (H.L.)
| | - Hyesook Lee
- Anti-Aging Research Center, Dong-eui University, Busan 47340, Korea; (D.H.K.); (H.H.); (S.Y.K.); (S.Y.J.); (M.Y.K.); (S.H.H.)
- Department of Biochemistry, Dong-eui University College of Korean Medicine, Busan 47227, Korea
- Correspondence: (Y.H.C.); (H.L.); Tel.: +82-51-890-3319 (Y.H.C.); +82-51-890-3315 (H.L.)
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Jiang Y, Fang Y, Ye Y, Xu X, Wang B, Gu J, Aschner M, Chen J, Lu R. Anti-Cancer Effects of 3, 3'-Diindolylmethane on Human Hepatocellular Carcinoma Cells Is Enhanced by Calcium Ionophore: The Role of Cytosolic Ca 2+ and p38 MAPK. Front Pharmacol 2019; 10:1167. [PMID: 31649538 PMCID: PMC6795059 DOI: 10.3389/fphar.2019.01167] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 09/11/2019] [Indexed: 12/19/2022] Open
Abstract
Purpose: 3,3'-Diindolylmethane (DIM), derived from indole-3-carbinol (I3C) in the Brassica species of cruciferous vegetables, has anticancer effects, but its exact underlying mechanism of action is unknown. We explored the roles of cytosolic free calcium ([Ca2+]i) and p38 MAPK in the anti-cancer effects of DIM in human hepatocellular carcinoma cells. Methods: Cell proliferation was measured with a Cell Counting Kit-8 (CCK-8) and the clonogenic formation assay. Cell apoptosis was examined by flow cytometric analysis and Hoechst dye staining. Cleaved-caspase3, cleaved-PARP, Bax, total, and phosphorylated p38 MAPK were assayed by western blotting. [Ca2+]i was measured with Fluo-3/AM by fluorescence microscopy. A23187, a calcium ionophore, was used to increase [Ca2+]i levels. Results: DIM inhibited cell proliferation in both SMMC-7721 and HepG2 cells in a concentration- and time-dependent manner. DIM also enhanced phosphorylation of p38 MAPK (p-p38), which was attenuated by SB203580. The proliferation inhibition and apoptosis induction by DIM were also blunted. In addition, DIM increased [Ca2+]i in HCC cells, and this effect was inhibited by the calcium chelator, BAPTA-AM, resulting in reduced p-p38 MAPK activation and apoptosis in DIM-treated cells, though the proliferation inhibition by DIM was unchanged. However, the DIM-induced cell proliferation inhibition and apoptosis were significantly enhanced by A23187, a selective calcium ionophore, which was attributed to exaggerated p-p38 MAPK. Conclusions: The calcium ionophore enhanced DIM-induced anti-cancer effects in hepatocellular carcinoma cells, secondary to [Ca2+]i-dependent activation of p38 MAPK. Treatment with a combination of DIM and calcium ionophore may offer a new approach to enhance the chemotherapeutic efficacy in liver cancer.
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Affiliation(s)
- Yuanyue Jiang
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, China
- Department of Pathology, Kunshan Hospital of Traditional Chinese Medicine, Suzhou, China
| | - Yanfei Fang
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, China
- Department of Gastroenterology, The First People's Hospital of Taicang City, Taicang Affiliated Hospital of Soochow University, Suzhou, China
| | - Yang Ye
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, China
| | - Xinming Xu
- Department of General Surgery, Affiliated Kunshan Hospital, Jiangsu University School of Medicine, Suzhou, China
| | - Bingfang Wang
- Department of Digestive Disease, Affiliated Kunshan Hospital, Jiangsu University School of Medicine, Suzhou, China
| | - Jie Gu
- Institute of Life Science, Jiangsu University, Zhenjiang, China
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, United States
| | - Jian Chen
- Department of General Surgery, Affiliated Kunshan Hospital, Jiangsu University School of Medicine, Suzhou, China
| | - Rongzhu Lu
- Department of Preventive Medicine and Public Health Laboratory Science, School of Medicine, Jiangsu University, Zhenjiang, China
- Center for Experimental Research, Affiliated Kunshan Hospital, Jiangsu University School of Medicine, Suzhou, China
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Del Pino AM, Regni L, D’Amato R, Tedeschini E, Businelli D, Proietti P, Palmerini CA. Selenium-Enriched Pollen Grains of Olea europaea L.: Ca 2+ Signaling and Germination Under Oxidative Stress. Front Plant Sci 2019; 10:1611. [PMID: 31921256 PMCID: PMC6917658 DOI: 10.3389/fpls.2019.01611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 11/15/2019] [Indexed: 05/07/2023]
Abstract
Selenium (Se) shows antioxidant properties that can be exploited in plants to combat abiotic stresses caused by reactive oxygen species produced in excess (ROS). Here, we show that the Se-fertilization of olive trees with sodium selenate effectively protects the pollen from oxidative stress. Pollen isolated from plants treated with Se or from untreated controls was incubated in vitro with H2O2 to produce an oxidative challenge. Given the impact of ROS on Ca2+ homeostasis and Ca2+-dependent signaling, cytosolic Ca2+ was measured to monitor cellular perturbations. We found that H2O2 interrupted Ca2+ homeostasis only in untreated pollen, while in samples treated in vitro with sodium selenate or selenium methionine, Ca2+ homeostasis was preserved. Furthermore, germination rates were considerably better maintained in Se-fertilized pollen compared to non-fertilized pollen (30% vs. 15%, respectively) after exposure to 1 mM H2O2. The same was observed with pollen treated in vitro with Se-methionine, which is the organic form of Se, in which part of the fertigated sodium selenate is converted in the plant. Combined, our results show a close correlation between ROS, Ca2+ homeostasis, and pollen fertility and provide clear evidence that Se-fertilization is a potential approach to preserve or improve agricultural productivity.
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Affiliation(s)
| | - Luca Regni
- *Correspondence: Luca Regni, ; Primo Proietti,
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10
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Bhattacharjee A, Prasad SK, Banerjee O, Singh S, Banerjee A, Bose A, Pal S, Maji BK, Mukherjee S. Targeting mitochondria with folic acid and vitamin B 12 ameliorates nicotine mediated islet cell dysfunction. Environ Toxicol 2018; 33:988-1000. [PMID: 29972271 DOI: 10.1002/tox.22586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/27/2018] [Accepted: 05/28/2018] [Indexed: 06/08/2023]
Abstract
Nicotine, one of the well-known highly toxic components of cigarette smoke, causes a number of adverse health effects and diseases. Our previous study has shown that nicotine induces reactive oxygen species (ROS) in islet cell and disrupts islet cell mitochondrial membrane potential (ΔΨm). However, supplementation with folic acid and vitamin B12 were found effective against nicotine induced changes in pancreatic islet cells. But the toxicological effects and underlying mechanisms of nicotine-induced mitochondrial dysfunction is still unknown. In this study, nicotine exposure decreases mitochondrial enzymes (pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase, aconitase, malate dehydrogenase) activities by increasing cytosolic Ca2+ level which may contribute to increased mitochondrial ROS production by raising its flow to mitochondria. This in turn produces malondialdehyde and nitric oxide (NO) with a concomitant decrease in the activities of antioxidative enzymes and glutathione levels leading to loss of ΔΨm. Simultaneously, nicotine induces pancreatic islet cell apoptosis by modulating ΔΨm via increased cytosolic Ca2+ level, altered Bcl-2, Bax, cytochrome c, caspase-9, PARP expressions which were prevented by the supplementation of folic acid and vitamin B12 . In conclusion, nicotine alters islet cell mitochondrial redox status, apoptotic machinery, and enzymes to cause disruption in the ΔΨm and supplementation of folic acid and vitamin B12 possibly blunted all these mitochondrial alterations. Therefore, this study may help to determine the pathophysiology of nicotine-mediated islet cell mitochondrial dysfunction.
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Affiliation(s)
- Ankita Bhattacharjee
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
| | - Shilpi Kumari Prasad
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
| | - Oly Banerjee
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
| | - Siddhartha Singh
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
| | - Arnab Banerjee
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
| | - Ananya Bose
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
| | - Swagata Pal
- Department of Physiology, Raja Peary Mohan College, Uttarpara, Kotrung, Hooghly, West Bengal, India
| | - Bithin Kumar Maji
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
| | - Sandip Mukherjee
- Department of Physiology, Serampore College, Serampore, Hooghly, West Bengal, India
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11
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Abstract
Clinical treatment of heart failure is still not fully solved. A novel class of agents, the myosin motor activators, acts directly on cardiac myosin resulting in an increased force generation and prolongation of contraction. Omecamtiv mecarbil, the lead molecule of this group, is now in human phase 3 displaying promising clinical performance. However, omecamtiv mecarbil is not selective to myosin, because it readily binds to and activates cardiac ryanodine receptors (RyR-2), an effect that may cause complications in case of overdose. In this study, in silico analysis was performed to investigate the docking of omecamtiv mecarbil and other structural analogues to cardiac myosin heavy chain and RyR-2 to select the structure that has a higher selectivity to myosin over RyR-2. In silico docking studies revealed that omecamtiv mecarbil has comparable affinity to myosin and RyR-2: the respective Kd values are 0.60 and 0.87 μmol/L. Another compound, CK-1032100, has much lower affinity to RyR-2 than omecamtiv mecarbil, while it still has a moderate affinity to myosin. It was concluded that further research starting from the chemical structure of CK-1032100 may result a better myosin activator burdened probably less by the RyR-2 binding side effect. It also is possible, however, that the selectivity of omecamtiv mecarbil to myosin over RyR-2 cannot be substantially improved, because similar moieties seem to be responsible for the high affinity to both myosin and RyR-2.
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Affiliation(s)
- Péter Nánási
- a Department of Biophysics and Cell Biology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - István Komáromi
- b Division of Clinical Laboratory Science, Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - János Almássy
- c Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
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12
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Khalid M, Brisson L, Tariq M, Hao Y, Guibon R, Fromont G, Mortadza SAS, Mousawi F, Manzoor S, Roger S, Jiang LH. Carcinoma-specific expression of P2Y11 receptor and its contribution in ATP-induced purinergic signalling and cell migration in human hepatocellular carcinoma cells. Oncotarget 2018; 8:37278-37290. [PMID: 28418839 PMCID: PMC5514908 DOI: 10.18632/oncotarget.16191] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 02/15/2017] [Indexed: 12/22/2022] Open
Abstract
Extracellular ATP-induced Ca2+ signalling is critical in regulating diverse physiological and disease processes. Emerging evidence suggests high concentrations of extracellular ATP in tumour tissues. In this study, we examined the P2 receptor for ATP-induced Ca2+ signalling in human hepatocellular carcinoma (HCC) cells. Fura-2-based measurements of the intracellular Ca2+ concentration ([Ca2+]i) showed that extracellular ATP induced an increase in the [Ca2+]i in human HCC Huh-7 and HepG2 cells. NF546, a P2Y11 receptor agonist was equally effective in inducing an increase in the [Ca2+]i. In contrast, agonists for the P2X receptors (αβmeATP and BzATP), P2Y1 receptor (MRS2365) or P2Y2 receptor (MRS2768) were ineffective. In addition, ATP/NF546-induced increases in the [Ca2+]i were strongly inhibited by treatment with NF340, a P2Y11 receptor antagonist. Immunofluorescent confocal imaging and western blotting analysis consistently demonstrated the P2Y11 receptor expression in Huh-7 and HepG2 cells. Transfection with P2Y11-specific siRNA attenuated the P2Y11 receptor protein expression level and also reduced NF546-induced increase in the [Ca2+]i. Importantly, immunohistochemistry revealed that the P2Y11 receptor was expressed at very high level in human HCC tissues and, by contrast, it was barely detected in normal liver tissues. Trans-well cell migration assay demonstrated that ATP and NF546 induced concentration-dependent stimulation of Huh-7 cell migration. Treatment with NF340 prevented ATP-induced stimulation of cell migration. Taken together, our results show carcinoma-specific expression of the P2Y11 receptor and its critical role in mediating ATP-inducing Ca2+ signalling and regulating cell migration in human HCC cells.
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Affiliation(s)
- Madiha Khalid
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK.,Atta-ur-Rahman School of Applied Biosciences, National University of Science and Technology, Islamabad, Pakistan
| | - Lucie Brisson
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François-Rabelais de Tours, Tours, France
| | - Menahil Tariq
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Yunjie Hao
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | | | | | | | - Fatema Mousawi
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Sobia Manzoor
- Atta-ur-Rahman School of Applied Biosciences, National University of Science and Technology, Islamabad, Pakistan
| | - Sébastien Roger
- Inserm UMR1069, Nutrition, Croissance et Cancer, Université François-Rabelais de Tours, Tours, France.,Institut Universitaire de France, Paris Cedex 05, France
| | - Lin-Hua Jiang
- School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, UK.,Inserm UMR1069, Nutrition, Croissance et Cancer, Université François-Rabelais de Tours, Tours, France.,Department of Physiology and Neurobiology, Xinxiang Medical University, Xinxiang, P. R. China.,Sino-UK Joint Laboratory of Brain Function and Injury, Xinxiang Medical University, Xinxiang, P. R. China
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13
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Hirano T, Kaneda T, Ozaki H, Hori M. Angiotensin II, a unique vasoactive agent dissociates myosin light chain phosphorylation from contraction. J Vet Med Sci 2018; 80:219-224. [PMID: 29269687 PMCID: PMC5836756 DOI: 10.1292/jvms.17-0415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Angiotensin II (100 nM) induced bi-phasic increases in cytosolic Ca2+ level ([Ca2+]i) through the activation of angiotensin II type 1 receptor. Pharmacological examinations using 10 µM verapamil, 30 µM La3+, and 1 µM thapsigargin indicated that the first phase of the [Ca2+]i-increase was mediated by Ca2+ release from sarcoplasmic reticulum (SR) and Ca2+ influx independently of voltage dependent Ca2+ channel (VDC). In contrast, the second phase of [Ca2+]i-increase was mediated by Ca2+ influx through VDC. Although both [Ca2+]i and myosin light chain (MLC)-phosphorylation at the first phase was apparently exceeded the threshold for contraction as estimated by high K+-induced responses, there was no appreciable contraction, indicating the dissociation between MLC phosphorylation and force during this phase. In contrast, the second phase of [Ca2+]i was associated with the increases in both MLC phosphorylation and force. These results suggest that angiotensin II is a unique agonist which dissociates MLC-phosphorylation from muscle force during the Ca2+ releases from SR.
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Affiliation(s)
- Takashi Hirano
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Takeharu Kaneda
- Laboratory of Veterinary Pharmacology Nippon Veterinary and Life Science University, Kyonan-cho 1-chome, Musashino, Tokyo 180-862, Japan
| | - Hiroshi Ozaki
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Masatoshi Hori
- Department of Veterinary Pharmacology, Graduate School of Agriculture and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan
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14
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Domínguez S, Fernández de Sevilla D, Buño W. Acetylcholine Facilitates a Depolarization-Induced Enhancement of Inhibition in Rat CA1 Pyramidal Neurons. Cereb Cortex 2018; 27:852-862. [PMID: 26620268 DOI: 10.1093/cercor/bhv276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Cholinergic mechanisms in the hippocampus regulate forms of synaptic plasticity linked with cognition and spatial navigation, but the underlying mechanisms remain largely unknown. Here, in rat hippocampal CA1 pyramidal cells under blockade of ionotropic glutamate receptors, we report that a single acetylcholine pulse and repeated depolarization activated a robust and enduring postsynaptic depolarization-induced enhancement of inhibition (DEI) that masked a presynaptic depolarization-induced suppression of inhibition (DSI). Increased cytosolic Ca2+ and M1-muscarinic receptor activation caused the rise in voltage-sensitive α5βγ2-containing γ-aminobutyric acid type-A receptors that generated DEI. In summary, this muscarinic-mediated activity-dependent plasticity rapidly transfers depolarization effects on inhibition from presynaptic suppression or DSI to postsynaptic enhancement or DEI, a change potentially relevant in behavior.
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Affiliation(s)
| | - David Fernández de Sevilla
- Instituto Cajal, CSIC, 28002 Madrid, Spain.,Depto. Anatomía, Histología y Neurociencia, Facultad de Medicina UAM, 28029 Madrid, Spain
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15
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Mendez AG, Juncal AB, Silva SBL, Thomas OP, Martín Vázquez V, Alfonso A, Vieytes MR, Vale C, Botana LM. The Marine Guanidine Alkaloid Crambescidin 816 Induces Calcium Influx and Cytotoxicity in Primary Cultures of Cortical Neurons through Glutamate Receptors. ACS Chem Neurosci 2017; 8:1609-1617. [PMID: 28375602 DOI: 10.1021/acschemneuro.7b00096] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Crambescidin 816 is a guanidine alkaloid produced by the sponge Crambe crambe with known antitumoral activity. While the information describing the effects of this alkaloid in central neurons is scarce, Cramb816 is known to block voltage dependent calcium channels being selective for L-type channels. Moreover, Cramb816 reduced neuronal viability through an unknown mechanism. Here, we aimed to describe the toxic activity of Cramb816 in cortical neurons. Since calcium influx is considered the main mechanism responsible for neuronal cell death, the effects of Cramb816 in the cytosolic calcium concentration of cortical neurons were studied. The alkaloid decreased neuronal viability and induced a dose-dependent increase in cytosolic calcium that was also related to the presence of calcium in the extracellular media. The increase in calcium influx was age dependent, being higher in younger neurons. Moreover, this effect was prevented by glutamate receptor antagonists, which did not fully block the cytotoxic effect of Cramb816 after 24 h of treatment but completely prevented Cramb816 cytotoxicity after 10 min exposure. Therefore, the findings presented herein provide new insights into the cytotoxic effect of Cramb816 in cortical neurons.
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Affiliation(s)
- Aida G. Mendez
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain
| | - Andrea Boente Juncal
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain
| | - Siguara B. L. Silva
- Geoazur, UMR Université Nice Sophia Antipolis-CNRS-IRD-OCA, 06560 Valbonne, France
- Laboratoire de Pharmacognosie,
UMR CNRS 8076 BioCIS, LabEx LERMIT, Faculté de Pharmacie, Université Paris-Sud, 92290 Châtenay-Malabry, France
| | - Olivier P. Thomas
- Geoazur, UMR Université Nice Sophia Antipolis-CNRS-IRD-OCA, 06560 Valbonne, France
- School of Chemistry, Marine Biodiscovery, National University of Ireland Galway, Galway, Ireland
| | - Víctor Martín Vázquez
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain
| | - Amparo Alfonso
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain
| | - Mercedes R. Vieytes
- Departamento
de Fisiología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain
| | - Carmen Vale
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain
| | - Luís M. Botana
- Departamento de Farmacología, Facultad de Veterinaria, Universidad de Santiago de Compostela, Lugo 27002, Spain
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16
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Abstract
Irisin is a newly identified hormone induced in muscle and adipose tissues by physical activity. This protein and its encoding gene have been identified in the brain; in addition, the precursor for irisin, FNDC5, can cross the blood-brain barrier. The fact that irisin is secreted during exercise together with the lower resting heart rate in athletes prompted us to investigate the effect of irisin on cardiac-projecting vagal neurons of nucleus ambiguus, a key regulatory site of heart rate. In vitro experiments in cultured nucleus ambiguus neurons indicate that irisin activates these neurons, inducing an increase in cytosolic Ca(2+) concentration and neuronal depolarization. In vivo microinjection of irisin into the nucleus ambiguus promotes bradycardia in conscious rats. Our study is the first to report the effects of irisin on the neurons controlling the cardiac vagal tone and to link a myokine to a cardioprotective role, by modulating central cardiovascular regulation.
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Affiliation(s)
- Eugen Brailoiu
- Center for Substance Abuse Research, Temple University School of Medicine, Philadelphia, Pennsylvania
| | - Elena Deliu
- Center for Substance Abuse Research, Temple University School of Medicine, Philadelphia, Pennsylvania
| | - Romeo A Sporici
- Department of Internal Medicine, Brandywine Hospital, Coatesville, Pennsylvania
| | - G Cristina Brailoiu
- Department of Pharmaceutical Sciences, Jefferson School of Pharmacy, Thomas Jefferson University, Philadelphia, Pennsylvania
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17
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Niu Y, Chai R, Liu L, Jin G, Liu M, Tang C, Zhang Y. Magnesium availability regulates the development of root hairs in Arabidopsis thaliana (L.) Heynh. Plant Cell Environ 2014; 37:2795-813. [PMID: 24851702 DOI: 10.1111/pce.12362] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 01/27/2014] [Accepted: 04/16/2014] [Indexed: 05/06/2023]
Abstract
Root hairs are reported to be plastic in response to nutrient supply, but relatively little is known about their development in response to magnesium (Mg) availability. Here, we showed that development of root hairs of Arabidopsis decreased progressively with increasing Mg supply, which was related to the initiation of new trichoblast files and likelihood of trichoblasts to form hairs. Tip-focused reactive oxygen species (ROS) and cytosolic Ca(2+) concentrations [(Ca(2+) )c] during elongation of root hairs were enhanced under low Mg but decreased under high Mg. Under low Mg, application of diphenylene iodonium (DPI) or BAPTA [1,2-bis(o-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid] blocked the enhanced development of root hairs and the opposite was true when the plants under high Mg were treated with phenazine methosulphate (PMS), methyl viologen (MV) or CaCl2 . Furthermore, Mg availability did not alter root hair growth in rhd2-1 mutant that contains lower levels of ROS and cytosolic [Ca(2+) ]c. Transcriptome data and qPCR results revealed a greater fraction of morphogenetic H-genes, and cell wall organization genes were up-regulated by low Mg but down-regulated by high Mg. Our data suggest a profound effect of Mg supply on the development of root hairs in Arabidopsis, through the characterized Ca(2+) and ROS signals that modulate the elongation of root hairs and the expression of root-hair morphogenetic genes.
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Affiliation(s)
- Yaofang Niu
- Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resources Sciences, Zhejiang University, Hangzhou, 310058, China; Department of Horticulture, College of Agronomy and Biotechnology, Zhejiang University, Hangzhou, 310058, China
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18
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Ma C, Guo J, Kang Y, Doman K, Bryan AC, Tax FE, Yamaguchi Y, Qi Z. AtPEPTIDE RECEPTOR2 mediates the AtPEPTIDE1-induced cytosolic Ca(2+) rise, which is required for the suppression of Glutamine Dumper gene expression in Arabidopsis roots. J Integr Plant Biol 2014; 56:684-94. [PMID: 24450616 DOI: 10.1111/jipb.12171] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Accepted: 01/17/2014] [Indexed: 05/07/2023]
Abstract
AtPEPTIDE RECEPTOR2 (AtPEPR2) is a member of leucine-rich repeat receptor-like kinase family and binds to a group of AtPROPEP gene-encoded endogenous peptides, AtPeps. Previously, we found that AtPEPR2 plays a moderate role in the AtPep1-mediated innate immunity responses in Arabidopsis leaf. In this study, we found that AtPEPR2 promoter has strong activity in the vascular tissues of the roots and the atpepr2 mutants showed a moderate but significantly shorter root phenotype. AtPEPR2 partially mediated AtPep1-induced root elongation inhibition. AtPep1-triggered cytosolic Ca(2+) transient rise in roots showed partial dependence on AtPEPR2 and fully on extracellular Ca(2+) ([Ca(2+) ]ext ). Transcriptional profiling analysis found that expression of 75% of AtPep1-modulated genes in roots was fully dependent on AtPEPR2, of which two dramatically induced genes showed partial dependence on the [Ca(2+) ]ext . Arabidopsis genome contains seven Glutamine Dumpers genes (AtGDUs), encoding amino acid exporters. Three of them (AtGDU2, 3, 5) were among the top 10 genes that were downregulated by AtPep1 through AtPEPR2 fully dependent pathway. Treatment with AtPep1 strongly suppressed promoter activity of AtGDU3 in roots, which was relieved by chelating [Ca(2+) ]ext . Arabidopsis overexpressing AtGDU3 showed a shorter root phenotype and decreased sensitivity to the AtPep1-mediated inhibition of root elongation. Taken together, this study demonstrated a significant role of AtPEPR2 in the AtPep1-mediated signaling in the roots.
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Affiliation(s)
- Chunli Ma
- College of Life Sciences, Inner Mongolia University, Hohhot, 010021, China
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19
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Brailoiu GC, Deliu E, Rabinowitz JE, Tilley DG, Koch WJ, Brailoiu E. Urotensin II promotes vagal-mediated bradycardia by activating cardiac-projecting parasympathetic neurons of nucleus ambiguus. J Neurochem 2014; 129:628-36. [PMID: 24521102 DOI: 10.1111/jnc.12679] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/31/2014] [Accepted: 02/05/2014] [Indexed: 12/31/2022]
Abstract
Urotensin II (U-II) is a cyclic undecapeptide that regulates cardiovascular function at central and peripheral sites. The functional role of U-II nucleus ambiguus, a key site controlling cardiac tone, has not been established, despite the identification of U-II and its receptor at this level. We report here that U-II produces an increase in cytosolic Ca(2+) concentration in retrogradely labeled cardiac vagal neurons of nucleus ambiguus via two pathways: (i) Ca(2+) release from the endoplasmic reticulum via inositol 1,4,5-trisphosphate receptor; and (ii) Ca(2+) influx through P/Q-type Ca(2+) channels. In addition, U-II depolarizes cultured cardiac parasympathetic neurons. Microinjection of increasing concentrations of U-II into nucleus ambiguus elicits dose-dependent bradycardia in conscious rats, indicating the in vivo activation of the cholinergic pathway controlling the heart rate. Both the in vitro and in vivo effects were abolished by the urotensin receptor antagonist, urantide. Our findings suggest that, in addition, to the previously reported increase in sympathetic outflow, U-II activates cardiac vagal neurons of nucleus ambiguus, which may contribute to cardioprotection.
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Affiliation(s)
- Gabriela Cristina Brailoiu
- Department of Pharmaceutical Sciences, Thomas Jefferson University, Jefferson School of Pharmacy, Philadelphia, Pennsylvania, USA
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20
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Wang H, Niu Y, Chai R, Liu M, Zhang Y. Cross-talk between nitric oxide and Ca (2+) in elevated CO 2-induced lateral root formation. Plant Signal Behav 2013; 8:e23106. [PMID: 23299426 PMCID: PMC3657006 DOI: 10.4161/psb.23106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This study demonstrates a potential signaling pathway of CO 2-dependent stimulation in lateral root (LR) formation. Elevated CO 2 increases production of nitric oxide (NO), which subsequently stimulates the generation of cytosolic Ca (2+) concentration by activating plasma membrane and/or intracellular Ca (2+)-permeable channels. Meanwhile, nitric oxide synthase (NOS), as one of the main NO source, requires Ca (2+) and CaM as cofactors. This complex interaction involves transduction cascades of multiple signals that lead to the LR formation and development. Finally, this review highlights the the role of Ca (2+) in the process that elevated CO 2 enhances the development of LRs through increased NO level.
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Affiliation(s)
- Huan Wang
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health; College of Environmental and Resource Science; Zhejiang University; Hangzhou, China
| | - Yaofang Niu
- Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition; College of Environmental and Resource Science; Zhejiang University; Hangzhou, China
| | - Rushan Chai
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health; College of Environmental and Resource Science; Zhejiang University; Hangzhou, China
| | - Miao Liu
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health; College of Environmental and Resource Science; Zhejiang University; Hangzhou, China
| | - Yongsong Zhang
- Ministry of Education Key Laboratory of Environment Remediation and Ecosystem Health; College of Environmental and Resource Science; Zhejiang University; Hangzhou, China
- Correspondence to: Yongsong Zhang,
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