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Natsume M, Niwa M, Ichikawa S, Okamoto T, Tsutsui H, Usukura D, Murata T, Abe R, Shimonaka M, Nishida T, Shiina I, Obata Y. Brefeldin A and M-COPA block the export of RTKs from the endoplasmic reticulum via simultaneous inactivation of ARF1, ARF4, and ARF5. J Biol Chem 2024:107327. [PMID: 38679330 DOI: 10.1016/j.jbc.2024.107327] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 03/20/2024] [Accepted: 04/17/2024] [Indexed: 05/01/2024] Open
Abstract
Normal receptor tyrosine kinases (RTKs) need to reach the plasma membrane (PM) for ligand-induced activation, whereas its cancer-causing mutants can be activated before reaching the PM in organelles, such as the Golgi/trans-Golgi network (TGN). Inhibitors of protein export from the endoplasmic reticulum (ER), such as brefeldin A (BFA) and 2-methylcoprophilinamide (M-COPA), can suppress the activation of mutant RTKs in cancer cells, suggesting that RTK mutants cannot initiate signaling in the ER. BFA and M-COPA block the function of ADP-ribosylation factors (ARFs) that play a crucial role in ER-Golgi protein trafficking. However, among ARF family proteins, the specific ARFs inhibited by BFA or M-COPA, that is, the ARFs involved in RTKs transport from the ER, remain unclear. In this study, we showed that M-COPA blocked the export of not only KIT but also PDGFRA/EGFR/MET RTKs from the ER. ER-retained RTKs could not fully transduce anti-apoptotic signals, thereby leading to cancer cell apoptosis. Moreover, single knockdown of ARF1, ARF3, ARF4, ARF5, or ARF6 could not block ER export of RTKs, indicating that BFA/M-COPA treatment cannot be mimicked by knockdown of only one ARF member. Interestingly, simultaneous transfection of ARF1, ARF4, and ARF5 siRNAs mirrored the effect of BFA/M-COPA treatment. Consistent with these results, in vitro pulldown assays showed that BFA/M-COPA blocked the function of ARF1, ARF4, and ARF5. Taken together, these results suggest that BFA/M-COPA targets at least ARF1, ARF4, and ARF5; in other words, RTKs require the simultaneous activation of ARF1, ARF4, and ARF5 for their ER export.
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Affiliation(s)
- Miyuki Natsume
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Department of Applied Chemistry
| | - Mariko Niwa
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Department of Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Sho Ichikawa
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Department of Applied Chemistry
| | - Takuma Okamoto
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Department of Applied Chemistry
| | | | | | | | - Ryo Abe
- Tokyo University of Science, Noda Chiba 278-8510, Japan
| | - Motoyuki Shimonaka
- Department of Chemistry, Faculty of Science, Tokyo University of Science, Shinjuku-ku, Tokyo 162-8601, Japan
| | - Toshirou Nishida
- National Cancer Center Hospital, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan; Laboratory of Nuclear Transport Dynamics, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Osaka 567-0085, Japan
| | | | - Yuuki Obata
- Laboratory of Intracellular Traffic & Oncology, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
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Zhao Q, Wu M, Zheng X, Yang L, Zhang Z, Li X, Chen J. ERGIC3 Silencing Additively Enhances the Growth Inhibition of BFA on Lung Adenocarcinoma Cells. Curr Cancer Drug Targets 2021; 20:67-75. [PMID: 31530266 DOI: 10.2174/1568009619666190917145906] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 02/28/2019] [Revised: 07/08/2019] [Accepted: 07/12/2019] [Indexed: 12/24/2022]
Abstract
BACKGROUND Brefeldin A (BFA) has been known to induce endoplasmic reticulum stress (ERS) and Golgi body stress in cancer cells. ERGIC3 (endoplasmic reticulum-Golgi intermediate compartment 3) is a type II transmembrane protein located in the endoplasmic reticulum and Golgi body. ERGIC3 over-expression is frequently observed in cancer cells. OBJECTIVE In this study, we aim to explore whether BFA administered concurrently with ERGIC3 silencing would work additively or synergistically inhibit cancer cell growth. METHODS ERGIC3-siRNA was used to knock-down the expression of ERGIC3 and BFA was used to induce ERS in lung cancer cell lines GLC-82 and A549. Q-RT-PCR and Western Blot analysis were used to detect the expression of ERGIC3 and downstream molecules. GraphPad Prism 6 was used to quantify the data. RESULTS We demonstrated that silencing of ERGIC3 via siRNA effectively led to down-regulation of ERGIC3 at both mRNA and protein levels in GLC-82 and A549 cells. While BFA or ERGIC3- silencing alone could induce ERS and inhibit cell growth, the combination treatment of lung cancer cells with ERGIC3-silencing and BFA was able to additively enhance the inhibition effects of cell growth through up-regulation of GRP78 resulting in cell cycle arrest. CONCLUSION ERGIC3 silencing in combination with BFA treatment could additively inhibit lung cancer cell growth. This finding might shed a light on new adjuvant therapy for lung adenocarcinoma.
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Affiliation(s)
- Qiurong Zhao
- Department of Genetics, Zunyi Medical University, Zunyi 563000, China
| | - Mingsong Wu
- Special Key Laboratory of Oral Disease Research and High Education Institute in Guizhou Province, Zunyi 563000, China
| | - Xiang Zheng
- Department of Genetics, Zunyi Medical University, Zunyi 563000, China
| | - Lei Yang
- Department of Genetics, Zunyi Medical University, Zunyi 563000, China
| | - Zhimin Zhang
- Department of Genetics, Zunyi Medical University, Zunyi 563000, China
| | - Xueying Li
- Department of Genetics, Zunyi Medical University, Zunyi 563000, China
| | - Jindong Chen
- Exploring Health, LLC., Guangzhou 510663, China.,Department of Urology, University of Rochester Medical Center, 601 Elmwood Ave., 14642 NY, United States
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Chai S, Nie Y, Li S. Nitrate deficiency induces differential endocytosis in roots through NRT1.1. Plant Signal Behav 2020; 15:1794394. [PMID: 32686596 PMCID: PMC8550534 DOI: 10.1080/15592324.2020.1794394] [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] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Roots grow asymmetrically, sometimes helically, around their growth direction likely to facilitate environmental sensing. We recently demonstrated that nitrate deficiency induces root coiling on horizontal surface through nitrate transporter/sensor NRT1.1 and PIN2- and AUX-mediated polar auxin transport. Here, we show that nitrate deficiency or NRT1.1 loss-of-function induces differential distribution of PIN2 between the future concave and concave sides in root epidermal cells. Treatment with pharmacological drugs suggests that enhanced endocytosis at the future convex side leads to reduced plasma membrane (PM) association of PIN2. A reduction of PIN2 at the PM would maintain a low auxin response to further enhance endocytosis at the convex side, leading to root coiling.
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Affiliation(s)
- Sen Chai
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- College of Horticulture, Qingdao Agricultural University, Qingdao, China
| | - Yongxin Nie
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Sha Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- CONTACT Sha Li, State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an271018, China
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Farias KJS, Machado PRL, de Almeida Júnior RF, Lopes da Fonseca BA. Brefeldin A and Cytochalasin B reduce dengue virus replication in cell cultures but do not protect mice against viral challenge. Access Microbiol 2019; 1:e000041. [PMID: 32974532 PMCID: PMC7470301 DOI: 10.1099/acmi.0.000041] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 06/21/2019] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Dengue is an emerging arboviral disease caused by dengue virus (DENV). DENV belongs to the family Flaviviridae and genus Flavivirus. No specific anti-DENV drugs are currently available. METHODS We investigated the antiviral activity of Brefeldin A (BFA) and Cytochalasin B (CB) against this infection. The drugs BFA and CB were used in the in vitro treatment of dengue-2 virus (DENV-2) infections in Vero cell cultures and in protection from lethality by post-challenge administration in Swiss mice. Viral load was quantified by qRT-PCR and plaque assay in Vero cell cultures, post-infection, treated or not with the drugs. Post-challenge drug levels were evaluated by survival analysis. RESULTS Our results indicate that doses of 5 µg ml-1 of BFA and 10 µg ml-1 of CB are not toxic to the cells and induce a statistically significant inhibition of DENV-2 replication in Vero cells when compared to control. No BFA- or CB-treated mice survived the challenge with DENV-2. CONCLUSION These data suggest that BFA and CB have an antiviral action against DENV-2 replication in Vero cell culture, but do not alter infected mice mortality.
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Affiliation(s)
- Kleber Juvenal Silva Farias
- Department of Internal Medicine, School of Medicine of Ribeirao Preto – University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, 14049-900, Ribeirao Preto SP, Brazil
- Program of Graduate Studies on Applied Microbiology and Immunology, School of Medicine of Ribeirao Preto – University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, 14049-900, Ribeirão Preto SP, Brazil
- *Correspondence: Kleber Juvenal Silva Farias,
| | - Paula Renata Lima Machado
- Department of Clinical Analysis and Toxicology, Federal University of Rio Grande do Norte, Street General Gustavo Cordeiro de Farias, 384, Petropolis, 59012-570 Natal, RN, Brazil
| | - Renato Ferreira de Almeida Júnior
- Department of Clinical Analysis and Toxicology, Federal University of Rio Grande do Norte, Street General Gustavo Cordeiro de Farias, 384, Petropolis, 59012-570 Natal, RN, Brazil
| | - Benedito Antônio Lopes da Fonseca
- Department of Internal Medicine, School of Medicine of Ribeirao Preto – University of Sao Paulo, Avenida Bandeirantes, 3900, Monte Alegre, 14049-900, Ribeirao Preto SP, Brazil
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Hong S, Hwang I, Gim E, Yang J, Park S, Yoon SH, Lee WW, Yu JW. Brefeldin A-sensitive ER-Golgi vesicle trafficking contributes to NLRP3-dependent caspase-1 activation. FASEB J 2018; 33:4547-4558. [PMID: 30592629 DOI: 10.1096/fj.201801585r] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Endoplasmic reticulum (ER)-Golgi vesicle trafficking plays a pivotal role in the conventional secretory pathway of many cytokines; however, the precise release mechanism of a major inflammasome mediator, IL-1β, is not thought to follow the conventional ER-Golgi route and remains elusive. Here, we found that perturbation of ER-Golgi trafficking by brefeldin A (BFA) treatment attenuated nucleotide-binding oligomerization domain-like receptor family, pyrin-domain-containing 3 (NLRP3) inflammasome activation in mouse bone marrow-derived macrophages (BMDMs). BFA treatment inhibited NLRP3-mediated inflammasome assembly and caspase-1 activation but did not block IL-1β secretion from BMDMs following BFA administration after NLRP3 inflammasome activation. Consistently, short-hairpin RNA-dependent knockdown of BFA-inhibited guanine nucleotide-exchange protein 1 (BIG1), a molecular target of BFA and an initiator of Golgi-specific vesicle trafficking, abolished NLRP3-dependent apoptosis-associated speck-like protein containing a caspase-recruitment domain oligomerization and caspase-1 activation in BMDMs. Similarly, knockdown of Golgi-specific BFA-resistance guanine nucleotide exchange factor 1, another target of BFA, clearly attenuated NLRP3-mediated caspase-1 activation in BMDMs. Mechanistically, inhibition of BIG1-mediated vesicle trafficking did not impair NLRP3-activating signal 2-promoted events, such as potassium efflux and mitochondrial rearrangement, but caused significant impairment of signal 1-triggered priming steps, including NF-κB-mediated pathways. These data suggest that BFA-targeted vesicle trafficking at the Golgi contributes to activation of the NLRP3 inflammasome signaling.-Hong, S., Hwang, I., Gim, E., Yang, J., Park, S., Yoon, S.-H., Lee, W.-W., Yu, J.-W. Brefeldin A-sensitive ER-Golgi vesicle trafficking contributes to NLRP3-dependent caspase-1 activation.
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Affiliation(s)
- Sujeong Hong
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 Program for Leading Universities and Students (PLUS) Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; and
| | - Inhwa Hwang
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 Program for Leading Universities and Students (PLUS) Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; and
| | - Eunji Gim
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 Program for Leading Universities and Students (PLUS) Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; and
| | - Jungmin Yang
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 Program for Leading Universities and Students (PLUS) Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; and
| | - Sangjun Park
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 Program for Leading Universities and Students (PLUS) Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; and
| | - Sung-Hyun Yoon
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 Program for Leading Universities and Students (PLUS) Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; and
| | - Won-Woo Lee
- Department of Biomedical Sciences and Seoul National University College of Medicine, Seoul, South Korea.,Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul, South Korea
| | - Je-Wook Yu
- Department of Microbiology and Immunology, Institute for Immunology and Immunological Diseases, Brain Korea 21 Program for Leading Universities and Students (PLUS) Project for Medical Science, Yonsei University College of Medicine, Seoul, Korea; and
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Hackenberger DK, Palijan G, Lončarić Ž, Jovanović Glavaš O, Hackenberger BK. Influence of soil temperature and moisture on biochemical biomarkers in earthworm and microbial activity after exposure to propiconazole and chlorantraniliprole. Ecotoxicol Environ Saf 2018; 148:480-489. [PMID: 29121590 DOI: 10.1016/j.ecoenv.2017.10.072] [Citation(s) in RCA: 8] [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: 06/28/2017] [Revised: 10/29/2017] [Accepted: 10/31/2017] [Indexed: 06/07/2023]
Abstract
Predicted climate change could impact the effects that various chemicals have on organisms. Increased temperature or change in precipitation regime could either enhance or lower toxicity of pesticides. The aim of this study is to assess how change in temperature and soil moisture affect biochemical biomarkers in Eisenia fetida earthworm and microbial activity in their excrements after exposure to a fungicide - propiconazole (PCZ) and an insecticide - chlorantraniliprole (CAP). For seven days, earthworms were exposed to the pesticides under four environmental conditions comprising combinations of two different temperatures (20°C and 25°C) and two different soil water holding capacities (30% and 50%). After exposure, in the collected earthworm casts the microbial activity was measured through dehydrogenase activity (DHA) and biofilm forming ability (BFA), and in the postmitochondrial fraction of earthworms the activities of acetylcholinesterase (AChE), catalase (CAT) and glutathione-S-transferase (GST) respectively. The temperature and the soil moisture affected enzyme activities and organism's response to pesticides. It was determined that a three-way interaction (pesticide concentration, temperature and moisture) is statistically significant for the CAT and GST after the CAP exposure, and for the AChE and CAT after the PCZ exposure. Interestingly, the AChE activity was induced by both pesticides at a higher temperature tested. The most important two-way interaction that was determined occurred between the concentration and temperature applied. DHA and BFA, as markers of microbial activity, were unevenly affected by PCZ, CAP and environmental conditions. The results of this experiment demonstrate that experiments with at least two different environmental conditions can give a very good insight into some possible effects that the climate change could have on the toxicity of pesticides. The interaction of environmental factors should play a more important role in the risk assessments for pesticides.
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Affiliation(s)
- Davorka K Hackenberger
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia.
| | - Goran Palijan
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia.
| | - Željka Lončarić
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia.
| | - Olga Jovanović Glavaš
- Department of Biology, University of Osijek, Cara Hadrijana 8A, HR-31000 Osijek, Croatia.
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Ito Y, Uemura T, Nakano A. The Golgi entry core compartment functions as a COPII-independent scaffold for ER-to-Golgi transport in plant cells. J Cell Sci 2018; 131:jcs.203893. [PMID: 28839076 DOI: 10.1242/jcs.203893] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 08/17/2017] [Indexed: 12/12/2022] Open
Abstract
Many questions remain about how the stacked structure of the Golgi is formed and maintained. In our previous study, we challenged this question using tobacco BY-2 cells and revealed that, upon Brefeldin A (BFA) treatment, previously undescribed small punctate structures containing a particular subset of cis-Golgi proteins are formed adjacent to the ER-exit sites and act as scaffolds for Golgi regeneration after BFA removal. In this study, we analyzed these structures further. The proteins that localize to these punctate structures originate from the cis-most cisternae. 3D time-lapse observations show that the trans-Golgi marker is transported through these structures during Golgi regeneration. These data indicate that the cis-most cisternae have a specialized region that receives cargo from the ER, which becomes obvious upon BFA treatment. Expression of a dominant mutant form of SAR1 does not affect the formation of the punctate structures. We propose to call these punctate structures the 'Golgi entry core compartment' (GECCO). They act as receivers for the rest of the Golgi materials and are formed independently of the COPII machinery.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Yoko Ito
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan
| | - Tomohiro Uemura
- Laboratory of Developmental Cell Biology, Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Akihiko Nakano
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama 351-0198, Japan.,Laboratory of Developmental Cell Biology, Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
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8
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Abstract
The endomembrane trafficking network is highly complex and dynamic, with both conventional and so-called unconventional routes which are in essence recently discovered pathways that are poorly understood in plants. One approach to dissecting endomembrane pathways that we have pioneered is the use of chemical biology. Classical genetic manipulations often deal with indirect pleiotropic phenotypes resulting from the perturbation of key players of the trafficking routes. Many of these difficulties can be circumvented using small molecules to modify or disrupt the function or localization of key proteins regulating these pathways. In this review, we summarize how small molecules have been used as probes to define these pathways, and how they could be used to increase current knowledge of unconventional protein secretion pathways.
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Affiliation(s)
- Cecilia Rodriguez-Furlan
- Center for Plant Cell Biology, Institute for Integrative Genome Biology, and Department of Botany and Plant Sciences, University of California, USA
| | - Natasha V Raikhel
- Center for Plant Cell Biology, Institute for Integrative Genome Biology, and Department of Botany and Plant Sciences, University of California, USA
| | - Glenn R Hicks
- Center for Plant Cell Biology, Institute for Integrative Genome Biology, and Department of Botany and Plant Sciences, University of California, USA
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Gujas B, Cruz TMD, Kastanaki E, Vermeer JEM, Munnik T, Rodriguez-Villalon A. Perturbing phosphoinositide homeostasis oppositely affects vascular differentiation in Arabidopsis thaliana roots. Development 2017; 144:3578-3589. [PMID: 28851711 PMCID: PMC5665488 DOI: 10.1242/dev.155788] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 08/18/2017] [Indexed: 01/16/2023]
Abstract
The plant vascular network consists of specialized phloem and xylem elements that undergo two distinct morphogenetic developmental programs to become transport-functional units. Whereas vacuolar rupture is a determinant step in protoxylem differentiation, protophloem elements never form a big central vacuole. Here, we show that a genetic disturbance of phosphatidylinositol 4,5-bis-phosphate [PtdIns(4,5)P2] homeostasis rewires cell trafficking towards the vacuole in Arabidopsis thaliana roots. Consequently, an enhanced phosphoinositide-mediated vacuolar biogenesis correlates with premature programmed cell death (PCD) and secondary cell wall elaboration in xylem cells. By contrast, vacuolar fusion events in protophloem cells trigger the abnormal formation of big vacuoles, preventing cell clearance and tissue functionality. Removal of the inositol 5' phosphatase COTYLEDON VASCULAR PATTERN 2 from the plasma membrane (PM) by brefeldin A (BFA) treatment increases PtdIns(4,5)P2 content at the PM and disrupts protophloem continuity. Conversely, BFA application abolishes vacuolar fusion events in xylem tissue without preventing PCD, suggesting the existence of additional PtdIns(4,5)P2-dependent cell death mechanisms. Overall, our data indicate that tight PM phosphoinositide homeostasis is required to modulate intracellular trafficking contributing to oppositely regulate vascular differentiation.
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Affiliation(s)
- Bojan Gujas
- Department of Biology, Swiss Federal Institute of Technology (ETH) Zurich, CH-8092, Zurich, Switzerland
| | - Tiago M D Cruz
- Department of Biology, Swiss Federal Institute of Technology (ETH) Zurich, CH-8092, Zurich, Switzerland
| | - Elizabeth Kastanaki
- Department of Biology, Swiss Federal Institute of Technology (ETH) Zurich, CH-8092, Zurich, Switzerland
| | - Joop E M Vermeer
- Department of Plant and Microbial Biology, University of Zurich, CH-8008, Zurich, Switzerland
| | - Teun Munnik
- Section Plant Cell Biology, Swammerdam Institute for Life Sciences, University of Amsterdam, 1090 GE, Amsterdam, The Netherlands
| | - Antia Rodriguez-Villalon
- Department of Biology, Swiss Federal Institute of Technology (ETH) Zurich, CH-8092, Zurich, Switzerland
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Ito Y, Toyooka K, Fujimoto M, Ueda T, Uemura T, Nakano A. The trans-Golgi Network and the Golgi Stacks Behave Independently During Regeneration After Brefeldin A Treatment in Tobacco BY-2 Cells. Plant Cell Physiol 2017; 58:811-821. [PMID: 28339924 DOI: 10.1093/pcp/pcx028] [Citation(s) in RCA: 9] [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: 11/12/2016] [Accepted: 02/10/2017] [Indexed: 06/06/2023]
Abstract
The trans-Golgi network (TGN) plays an essential role in intracellular membrane trafficking. In plant cells, recent live-cell imaging studies have revealed the dynamic behavior of the TGN independent from the Golgi apparatus. In order to better understand the relationships between the two organelles, we examined their dynamic responses to the reagent brefeldin A (BFA) and their recovery after BFA removal. Golgi markers responded to BFA similarly over a range of concentrations, whereas the behavior of the TGN was BFA concentration dependent. The TGN formed aggregates at high concentrations of BFA; however, TGN proteins relocalized to numerous small vesicular structures dispersed throughout the cytoplasm at lower BFA concentrations. During recovery from weak BFA treatment, the TGN started to regenerate earlier than the completion of the Golgi. The regeneration of the two organelles proceeded independently of each other for a while, and eventually was completed by their association. Our data suggest that there is some degree of autonomy for the regeneration of the TGN and the Golgi in tobacco BY-2 cells.
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Affiliation(s)
- Yoko Ito
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama, Japan
| | - Kiminori Toyooka
- Mass Spectrometry and Microscopy Unit, Technology Platform Division, RIKEN Center for Sustainable Resource Science, Tsurumi-ku, Yokohama, Kanagawa, Japan
| | - Masaru Fujimoto
- Laboratory of Plant Molecular Genetics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Takashi Ueda
- Division of Cellular Dynamics, National Institute for Basic Biology, Okazaki, Aichi, Japan
- Department of Basic Biology, Graduate University for Advanced Studies, Okazaki, Aichi, Japan
- Japan Science and Technology Agency (JST), PRESTO, Kawaguchi, Saitama, Japan
| | - Tomohiro Uemura
- Laboratory of Developmental Cell Biology, Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Akihiko Nakano
- Live Cell Super-Resolution Imaging Research Team, RIKEN Center for Advanced Photonics, Wako, Saitama, Japan
- Laboratory of Developmental Cell Biology, Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
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Verma S, Prasad B, Mishra IM. Treatment of purified terephthalic acid wastewater using a bio-waste-adsorbent bagasse fly ash ( BFA). Environ Sci Pollut Res Int 2017; 24:1953-1966. [PMID: 27798804 DOI: 10.1007/s11356-016-7986-1] [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] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 10/24/2016] [Indexed: 06/06/2023]
Abstract
Purified terephthalic acid (PTA) plant of a petrochemical unit generates wastewater having high pollution load. Acid treatment of this wastewater reduces the chemical oxygen demand (COD) load by more than 50%, still leaving substantial COD load (>1500 mg/L) which should be removed. The present study reports on the use of a bio-waste-adsorbent bagasse fly ash (BFA) for the reduction of COD and other recalcitrant acids from this wastewater. The BFA showed basic character and was mesoporous with a BET specific surface area of 82.4 m2/g. Optimum conditions for the adsorptive treatment of acid-pretreated PTA wastewater were found to be as follows: initial pH (pHi) = 4, BFA dosage = 15 g/L, and contact time = 3 h. Adsorption treatment resulted in 58.2% removal of COD, 96.3% removal of terephthalic acid (TA), and 99.9% removal of benzoic acid (BA). TA and BA were removed from the pretreated PTA wastewater through precipitation and sedimentation of un-dissociated acid molecules inside the mesopores of the BFA. The results showed that the COD removed by the BFA followed pseudo-second-order kinetics. Equilibrium sorption data were best correlated by the Freundlich isotherm. The process of adsorptive removal of COD was found to be exothermic. The change in the Gibbs free energy was found to be negative, suggesting that the adsorption process is spontaneous and feasible for the treatment of PTA wastewater.
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Affiliation(s)
- Shilpi Verma
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India.
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
| | - Basheshwar Prasad
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
| | - Indra Mani Mishra
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
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12
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Tanaka R, Amijima M, Iwata Y, Koizumi N, Mishiba KI. Effect of light and auxin transport inhibitors on endoreduplication in hypocotyl and cotyledon. Plant Cell Rep 2016; 35:2539-2547. [PMID: 27637202 DOI: 10.1007/s00299-016-2054-3] [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] [Received: 07/21/2016] [Accepted: 09/06/2016] [Indexed: 06/06/2023]
Abstract
Enhancement of endoreduplication in dark-grown hypocotyl is a common feature in dicotyledonous polysomatic plants, and TIBA-mediated inhibition of the endoreduplication is partially due to abnormal actin organization. Many higher plant species use endoreduplication during cell differentiation. However, the mechanisms underlying this process have remained elusive. In this study, we examined endoreduplication in hypocotyls and cotyledons in response to light in some dicotyledonous plant species. Enhancement of endoreduplication was found in the dark-grown hypocotyls of all the polysomatic species analyzed across five different families, indicating that this process is a common feature in dicotyledonous plants having polysomatic tissues. Conversely, endoreduplication was enhanced in the light-grown cotyledons in four of the five species analyzed. We also analyzed the effect of a polar auxin transport inhibitor, 2,3,5-triiodobenzoic acid (TIBA) on endoreduplication in hypocotyl and cotyledon tissues of radish (Raphanus sativus L. var. longipinnatus Bailey). TIBA was found to inhibit and promote endoreduplication in hypocotyls and cotyledons, respectively, suggesting that the endoreduplication mechanism differs in these organs. To gain insight into the effect of TIBA, radish and spinach (Spinacia oleracea L.) seedlings were treated with a vesicle-trafficking inhibitor, brefeldin A, and an actin polymerization inhibitor, cytochalasin D. Both of the inhibitors partially inhibited endoreduplication of the dark-grown hypocotyl tissues, suggesting that the prominent inhibition of endoreduplication by TIBA might be attributed to its multifaceted role.
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Affiliation(s)
- Riko Tanaka
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen, Nakaku, Sakai, Osaka, 599-8531, Japan
| | - Makoto Amijima
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen, Nakaku, Sakai, Osaka, 599-8531, Japan
| | - Yuji Iwata
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen, Nakaku, Sakai, Osaka, 599-8531, Japan
| | - Nozomu Koizumi
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen, Nakaku, Sakai, Osaka, 599-8531, Japan
| | - Kei-Ichiro Mishiba
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, 1-1 Gakuen, Nakaku, Sakai, Osaka, 599-8531, Japan.
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13
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Abstract
The classical Golgi pathway is not the only mechanism for vacuolar protein transport in plants because alternative transport mechanisms have been described. The existence of these alternative pathways can be demonstrated using several chemicals and here we describe the use of brefeldin A (BFA), endo-β-N-acetylglucosaminidase H (Endo-H), and tunicamycin, on isolated tobacco leaf protoplasts. Two main methods are illustrated in this chapter, protoplast pulse-chase followed by protein immunoprecipitation, and protoplast immunofluorescence.
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Affiliation(s)
- Francesca De Marchis
- Institute of Biosciences and Bioresources, Research Division of Perugia, National Research Council, 06128, Perugia, Italy
| | - Andrea Pompa
- Institute of Biosciences and Bioresources, Research Division of Perugia, National Research Council, 06128, Perugia, Italy
| | - Michele Bellucci
- Institute of Biosciences and Bioresources, Research Division of Perugia, National Research Council, 06128, Perugia, Italy.
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14
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Davies JC, Tamaddon-Jahromi S, Jannoo R, Kanamarlapudi V. Cytohesin 2/ARF6 regulates preadipocyte migration through the activation of ERK1/2. Biochem Pharmacol 2014; 92:651-60. [PMID: 25450674 DOI: 10.1016/j.bcp.2014.09.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Revised: 09/30/2014] [Accepted: 09/30/2014] [Indexed: 01/14/2023]
Abstract
Preadipocyte migration is vital for the development of adipose tissue, which plays a crucial role in lipid metabolism. ADP-ribosylation factor 6 (ARF6) small GTPase, which regulates membrane trafficking, is activated by GTP-exchange factors (GEFs) such as cytohesin 2. Cytohesin 2 and ARF6 have previously been implicated in the regulation of 3T3-L1 preadipocyte migration. We investigated here the molecular mechanism underlying the cytohesin 2 and ARF6 mediated regulation of preadipocyte migration. Preadipocyte migration and the activation of ARF6 and ERK1/2 were studied by using a number of approaches, including pharmacological inhibitors, siRNA and the inhibitory peptides. The siRNA mediated down regulation of ARF6 and cytohesin 2 expression confirmed the requirement of both for migration of preadipocytes. Phosphatidylinositol 3-kinase (PI3K) and PI 4,5-bisphosphate (PIP2) have also found to be essential for the cytohesin 2/ARF6 induced preadipocyte migration. Pharmacological inhibition of the activation of ARF6, ERK1/2 or dynamin led to significant reduction in migration of 3T3-L1 preadipocytes. Furthermore, our study revealed the activation of ARF6 and ERK1/2 during migration of preadipocytes. In the migrating preadipocytes, ARF6 activation was inhibited with SecinH3 (cytohesin inhibitor) and LY294002 (PI3K inhibitor) whereas the ERK1/2 phosphorylation was inhibited with SecinH3, LY294002, PBP10 (a PIP2 sequester peptide) and PD98059 (MAPKK inhibitor). However, dynosore (dynamin inhibitor) had inhibited neither ARF6 activation nor ERK1/2 phosphorylation during preadipocyte migration. These results together suggest that cytohesin 2 activates ARF6 in a PI3K dependent manner and then the active ARF6 causes phosphorylation of ERK1/2 during preadipocyte migration.
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15
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Davies JCB, Bain SC, Kanamarlapudi V. ADP-ribosylation factor 6 regulates endothelin-1-induced lipolysis in adipocytes. Biochem Pharmacol 2014; 90:406-13. [PMID: 24955982 DOI: 10.1016/j.bcp.2014.06.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 06/12/2014] [Accepted: 06/13/2014] [Indexed: 01/11/2023]
Abstract
Endothelin-1 (ET-1) induces lipolysis in adipocytes, where ET-1 chronic exposure results in insulin resistance (IR) through suppression of glucose transporter (GLUT)4 translocation to the plasma membrane and consequently glucose uptake. ARF6 small GTPase, which plays a vital role in cell surface receptors trafficking, has previously been shown to regulate GLUT4 recycling and thereby insulin signalling. ARF6 also plays a role in ET-1 promoted endothelial cell migration. However, ARF6 involvement in ET-1-induced lipolysis in adipocytes is unknown. Therefore, we investigated the role of ARF6 in ET-1-induced lipolysis in 3T3-L1 adipocytes. This was achieved by studying the effect of inhibitors for the activation of ARF6 and other signalling proteins on ET-1 induced lipolysis and ARF6 activation in the adipocytes. Our results indicate that ET-1 induces, through endothelin type A receptor (ETAR), lipolysis, the ARF6 activation and extracellular-signal regulated kinase (ERK) phosphorylation in adipocytes, further ET-1 stimulated lipolysis is inhibited by the inhibitors of ARF6 activation, ERK phosphorylation and dynamin, which is essential for endocytosis. Our studies also revealed that ARF6 acts upstream of ERK in ET-1-indcued lipolysis. In summary, we determined that ET-1 activation of ETAR signalled through ARF6, which is crucial for lipolysis.
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Affiliation(s)
- Jonathon C B Davies
- Institute of Life Science 1, College of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, UK
| | - Stephen C Bain
- Institute of Life Science 1, College of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, UK
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16
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Ohsaki Y, Cheng J, Yamairi K, Pan X, Hussain MM, Fujimoto T. Inhibition of ADP-ribosylation suppresses aberrant accumulation of lipidated apolipoprotein B in the endoplasmic reticulum. FEBS Lett 2013; 587:3696-702. [PMID: 24100140 DOI: 10.1016/j.febslet.2013.09.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 09/17/2013] [Accepted: 09/17/2013] [Indexed: 11/19/2022]
Abstract
ApoB-crescent, an endoplasmic reticulum (ER)-lipid droplet amalgamation structure, is a useful marker to indicate aberrant lipidated apolipoprotein B accumulation in the hepatocyte ER. Blockade of the ER-to-Golgi transport by either vesicle transport inhibitors or dominant-negative Arf1 caused a significant increase in ApoB-crescents. However, a low concentration of Brefeldin A induced the same result without affecting protein secretion, suggesting ADP-ribosylation as an additional mechanism. ADP-ribosylation inhibitors not only suppressed the increase of ApoB-crescents, but also rapidly dissolved existing ApoB-crescents. These results implicate the involvement of ADP-ribosylation in the ApoB-crescent formation and maintenance process at the ER.
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Affiliation(s)
- Yuki Ohsaki
- Department of Anatomy and Molecular Cell Biology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
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17
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Hardenacke K, Kuhn J, Lenartz D, Maarouf M, Mai JK, Bartsch C, Freund HJ, Sturm V. Stimulate or degenerate: deep brain stimulation of the nucleus basalis Meynert in Alzheimer dementia. World Neurosurg 2012; 80:S27.e35-43. [PMID: 23246738 DOI: 10.1016/j.wneu.2012.12.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [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: 05/16/2012] [Revised: 11/16/2012] [Accepted: 12/07/2012] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Deep brain stimulation (DBS) is a therapeutically effective neurosurgical method originally applied in movement disorders. Over time, the application of DBS has increasingly been considered as a therapeutic option for several neuropsychiatric disorders, including Gilles de la Tourette syndrome, obsessive compulsive disorder, major depression and addiction. Latest research suggests beneficial effects of DBS in Alzheimer dementia (AD). Because of the high prevalence and the considerable burden of the disease, we endeavored to discuss and reveal the challenges of DBS in AD. METHODS Recent literature on the pathophysiology of AD, including translational data and human studies, has been studied to generate a fundamental hypothesis regarding the effects of electrical stimulation on cognition and to facilitate our ongoing pilot study regarding DBS of the nucleus basalis Meynert (NBM) in patients with AD. RESULTS It is hypothesized that DBS in the nucleus basalis Meynert could probably improve or at least stabilize memory and cognitive functioning in patients with AD by facilitating neural oscillations and by enhancing the synthesis of nerve growth factors. CONCLUSIONS Considering the large number of patients suffering from AD, there is a great need for novel and effective treatment methods. Our research provides insights into the theoretical background of DBS in AD. Providing that our hypothesis will be validated by our ongoing pilot study, DBS could be an opportunity in the treatment of AD.
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Affiliation(s)
- Katja Hardenacke
- Department of Psychiatry and Psychotherapy, University of Cologne, Cologne, Germany
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18
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Lenucci MS, Piro G, Dalessandro G. In muro feruloylation and oxidative coupling in monocots: a possible role in plant defense against pathogen attacks. Plant Signal Behav 2009; 4:228-30. [PMID: 19721758 PMCID: PMC2652537 DOI: 10.4161/psb.4.3.7883] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2009] [Accepted: 01/19/2009] [Indexed: 05/28/2023]
Abstract
Recently we have suggested that (glucurono)arabinoxylans [(G)AX] feruloylation and oxidative coupling occur both intra-protoplasmically and, extra-protoplasmically, in the plant cell wall. In this work we illustrate a model of two possible mechanisms of polysaccharide feruloylation and oxidative coupling in plants. Moreover, we take into consideration the possible role of in muro feruloylation as a rapid defense mechanism against potential plant pathogen and parasite infections.
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Affiliation(s)
- Marcello S Lenucci
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (DiSTeBA), Università del Salento, Lecce, Italy.
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19
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Li L, Saga N, Mikami K. Effects of cell wall synthesis on cell polarity in the red alga Porphyra yezoensis. Plant Signal Behav 2008; 3:1126-1128. [PMID: 19704455 PMCID: PMC2634476 DOI: 10.4161/psb.3.12.7041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 09/17/2008] [Indexed: 05/28/2023]
Abstract
Polarity is a fundamental cell property essential for differentiation, proliferation and morphogenesis in unicellular and multicellular organisms. We have recently demonstrated that phosphatidylinositol 3-kinase (PI3K) activity is required for the establishment of anterior-posterior axis, leading to asymmetrical localization of F-actin in migrating monospores of the red alga Porphyra yezoensis. We also showed that the formation of the apical-basal axis via adhesion of monospores to the substratum after the cessation of migration requires newly synthesized proteins and does not depend on PI3K activity. However, little is known about the mechanism and regulation of axis conversion during development of monospores. In this addendum, we report our investigation as to the role of the cell wall in axis conversion. Our results indicate that inhibition of cell wall synthesis prevented the development of germlings. Also, defects in the cell wall disrupted the asymmetrical distribution of F-actin and inhibited the adhesion to the substratum that is required for establishment of apical-basal axis. Hence, we conclude that the cell wall is critical for the maintenance of cell polarity in migrating cells, which is indirectly involved in axis conversion via enabling monospores to adhere to the substratum.
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Affiliation(s)
- Lin Li
- Graduate School of Fisheries Sciences; Hokkaido University; Hakodate Japan
| | - Naotsune Saga
- Faculty of Fisheries Sciences; Hokkaido University; Hakodate Japan
| | - Koji Mikami
- Faculty of Fisheries Sciences; Hokkaido University; Hakodate Japan
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