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Xing Y, Yang M, Chen X. Fabrication of P and N Co-Doped Carbon Dots for Fe 3+ Detection in Serum and Lysosomal Tracking in Living Cells. BIOSENSORS 2023; 13:230. [PMID: 36831996 PMCID: PMC9954533 DOI: 10.3390/bios13020230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Doping with heteroatoms allows the retention of the general characteristics of carbon dots while allowing their physicochemical and photochemical properties to be effectively modulated. In this work, we report the preparation of ultrastable P and N co-doped carbon dots (PNCDs) that can be used for the highly selective detection of Fe3+ and the tracking of lysosomes in living cells. Fluorescent PNCDs were facilely prepared via a hydrothermal treatment of ethylenediamine and phytic acid, and they exhibited a high quantum yield of 22.0%. The strong coordination interaction between the phosphorus groups of PNCDs and Fe3+ rendered them efficient probes for use in selective Fe3+ detection, with a detection limit of 0.39 μM, and we demonstrated their practicability by accurately detecting the Fe3+ contents in bio-samples. At the same time, PNCDs exhibited high lysosomal location specificity in different cell lines due to surface lipophilic amino groups, and real-time tracking of the lysosome morphology in HeLa cells was achieved. The present work suggests that the fabrication of heteroatom-doped CDs might be an effective strategy to provide promising tools for cytology, such as organelle tracking.
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Affiliation(s)
- Yanzhi Xing
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
| | - Mei Yang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
| | - Xuwei Chen
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, China
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2
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Wang Y, Wang YF, Li X, Wang Y, Huang Q, Ma X, Liang XJ. Nanoparticle-Driven Controllable Mitochondrial Regulation through Lysosome-Mitochondria Interactome. ACS NANO 2022; 16:12553-12568. [PMID: 35876466 DOI: 10.1021/acsnano.2c04078] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Precise subcellular manipulation remains challenging in quantitative biological studies. After target modification and hierarchical assembly, nanoparticles can be functionalized for intracellular investigation. However, it remains unclear whether nanoparticles themselves can progressively manipulate subcellular processes, especially organellar networks. Mitochondria act as the energetic supply, whose fission dynamics are often modulated by molecular reagents. Here, using different-sized gold nanoparticles (AuNPs) as a model, we demonstrated the nanoparticle-driven controllable regulation on mitochondria. Compared with molecular reagents, AuNPs could induce size-dependent mitochondrial fission without detectable cell injury, and this process was reversible along with intracellular AuNPs' clearance. Mechanistically, it was attributed to the AuNPs-induced enhanced organelle interactome between lysosomes and mitochondria. Lysosomal accumulation of AuNPs induced lysosomal swelling and lysosomal motility alterations, promoting mitochondrial fission through the increased "kiss" events during the "kiss-and-run" moving of the lysosome-mitochondria interactome. This study highlights the fundamental understanding to fully explore the intrinsic capability of nanoparticles by engineering their basic properties. Also, it provides practical guidance to investigate the delicate nanolevel regulation on biological processes.
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Affiliation(s)
- Yufei Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences and National Center for Nanoscience and Technology of China, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yi-Feng Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences and National Center for Nanoscience and Technology of China, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xianlei Li
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences and National Center for Nanoscience and Technology of China, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuqing Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences and National Center for Nanoscience and Technology of China, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Sino-Danish Center for Education and Research, Sino-Danish College of University of Chinese Academy of Sciences, Beijing 100049, China
| | - Qianqian Huang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences and National Center for Nanoscience and Technology of China, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Sino-Danish Center for Education and Research, Sino-Danish College of University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaowei Ma
- National Center for Veterinary Drug Safety Evaluation, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Xing-Jie Liang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences and National Center for Nanoscience and Technology of China, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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3
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Xia L, Wang X, Yao W, Wang M, Zhu J. Lipopolysaccharide increases exosomes secretion from endothelial progenitor cells by toll-like receptor 4 dependent mechanism. Biol Cell 2022; 114:127-137. [PMID: 35235701 DOI: 10.1111/boc.202100086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/18/2022] [Accepted: 02/17/2022] [Indexed: 11/27/2022]
Abstract
Endothelial progenitor cells (EPCs) can exert angiogenic effects by a paracrine mechanism, where exosomes work as an important mediator. Recent studies reported functional expression of toll-like receptor (TLR) 4 on human EPCs and dose-dependent effects of lipopolysaccharide (LPS) on EPC angiogenic properties. To study on the effects of TLR4/LPS signaling on EPC-derived exosomes (Exo) and involved mechanisms, we investigated the effect of LPS on exosomes secretion from human EPC and tested Exo functions by senescence-associated β-galactosidase activity assay and reactive oxygen species (ROS) related H2 DCF-DA assay. To clarify the mechanism, we examined the changes in intracellular calcium levels and multivesicular bodies (MVBs) development in EPC. We employed the inhibitors of the plasma membrane Ca 2+ -ATPase (PMCA), endoplasmic reticulum Ca 2+ -ATPase (ERCA), PLC-IP3 pathway and store-operated calcium entry to assess the effects of LPS on calcium signalings which critical for exosome secretion. LPS induced the release of Exo in a TLR4-dependent manner in vitro, which effect can be partly abrogated by the membrane-permeable IP 3 R antagonist, 2-aminoethyl diphenylborinate (2-APB), but not PLC inhibitor, U-73122. The LPS can significantly delay the fallback of [Ca 2+ ]i after isolating the cellular PMCA activity, and disturb PMCA 1/4 expression. The distribution of elevated intracellular calcium seemed coincident with the development of MVBs. Furthermore, the LPS-induced Exo maintained valid anti-oxidation/senescence properties. The PMCA and ER Ca 2+ release mechanism may contribute to the pro-exosomal effects of LPS on EPC, which is valuable for potential pro-regenerative application in future. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Liang Xia
- Department of Clinical Medicine, School of Medicine, Zhejiang University City College, Hangzhou, Zhejiang, China
| | - Xiaotian Wang
- Department of Clinical Medicine, School of Medicine, Zhejiang University City College, Hangzhou, Zhejiang, China
| | - Weidong Yao
- Department of Clinical Medicine, School of Medicine, Zhejiang University City College, Hangzhou, Zhejiang, China
| | - Meihui Wang
- Biomedical Research (Therapy) Center, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Junhui Zhu
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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4
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Apoptosis, Pyroptosis, and Necroptosis-Oh My! The Many Ways a Cell Can Die. J Mol Biol 2021; 434:167378. [PMID: 34838807 DOI: 10.1016/j.jmb.2021.167378] [Citation(s) in RCA: 119] [Impact Index Per Article: 39.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/12/2021] [Accepted: 11/21/2021] [Indexed: 12/12/2022]
Abstract
Cell death is an essential process in all living organisms and occurs through different mechanisms. The three main types of programmed cell death are apoptosis, pyroptosis, and necroptosis, and each of these pathways employs complex molecular and cellular mechanisms. Although there are mechanisms and outcomes specific to each pathway, they share common components and features. In this review, we discuss recent discoveries in these three best understood modes of cell death, highlighting their singularities, and examining the intriguing notion that common players shape different individual pathways in this highly interconnected and coordinated cell death system. Understanding the similarities and differences of these cell death processes is crucial to enable targeted strategies to manipulate these pathways for therapeutic benefit.
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Villegas-Mendez A, Stafford N, Haley MJ, Pravitasari NE, Baudoin F, Ali A, Asih PBS, Siregar JE, Baena E, Syafruddin D, Couper KN, Oceandy D. The plasma membrane calcium ATPase 4 does not influence parasite levels but partially promotes experimental cerebral malaria during murine blood stage malaria. Malar J 2021; 20:297. [PMID: 34215257 PMCID: PMC8252299 DOI: 10.1186/s12936-021-03832-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 06/24/2021] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Recent genome wide analysis studies have identified a strong association between single nucleotide variations within the human ATP2B4 gene and susceptibility to severe malaria. The ATP2B4 gene encodes the plasma membrane calcium ATPase 4 (PMCA4), which is responsible for controlling the physiological level of intracellular calcium in many cell types, including red blood cells (RBCs). It is, therefore, postulated that genetic differences in the activity or expression level of PMCA4 alters intracellular Ca2+ levels and affects RBC hydration, modulating the invasion and growth of the Plasmodium parasite within its target host cell. METHODS In this study the course of three different Plasmodium spp. infections were examined in mice with systemic knockout of Pmca4 expression. RESULTS Ablation of PMCA4 reduced the size of RBCs and their haemoglobin content but did not affect RBC maturation and reticulocyte count. Surprisingly, knockout of PMCA4 did not significantly alter peripheral parasite burdens or the dynamics of blood stage Plasmodium chabaudi infection or reticulocyte-restricted Plasmodium yoelii infection. Interestingly, although ablation of PMCA4 did not affect peripheral parasite levels during Plasmodium berghei infection, it did promote slight protection against experimental cerebral malaria, associated with a minor reduction in antigen-experienced T cell accumulation in the brain. CONCLUSIONS The finding suggests that PMCA4 may play a minor role in the development of severe malarial complications, but that this appears independent of direct effects on parasite invasion, growth or survival within RBCs.
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Affiliation(s)
- Ana Villegas-Mendez
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, M13 9PT, UK
| | - Nicholas Stafford
- Division of Cardiovascular Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, M13 9PT, UK
| | - Michael J Haley
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, M13 9PT, UK
| | | | - Florence Baudoin
- Division of Cardiovascular Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, M13 9PT, UK
| | - Adnan Ali
- Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park, Manchester, SK10 4TG, UK
- Division of Cancer Sciences, The University of Manchester, Manchester, UK
| | | | | | - Esther Baena
- Cancer Research UK Manchester Institute, The University of Manchester, Alderley Park, Manchester, SK10 4TG, UK
| | - Din Syafruddin
- Eijkman Institute for Molecular Biology, Jakarta, 10430, Indonesia
| | - Kevin N Couper
- The Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, M13 9PT, UK.
| | - Delvac Oceandy
- Division of Cardiovascular Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, The University of Manchester, Manchester, M13 9PT, UK.
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Bertheloot D, Latz E, Franklin BS. Necroptosis, pyroptosis and apoptosis: an intricate game of cell death. Cell Mol Immunol 2021; 18:1106-1121. [PMID: 33785842 PMCID: PMC8008022 DOI: 10.1038/s41423-020-00630-3] [Citation(s) in RCA: 733] [Impact Index Per Article: 244.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 12/15/2020] [Indexed: 02/01/2023] Open
Abstract
Cell death is a fundamental physiological process in all living organisms. Its roles extend from embryonic development, organ maintenance, and aging to the coordination of immune responses and autoimmunity. In recent years, our understanding of the mechanisms orchestrating cellular death and its consequences on immunity and homeostasis has increased substantially. Different modalities of what has become known as 'programmed cell death' have been described, and some key players in these processes have been identified. We have learned more about the intricacies that fine tune the activity of common players and ultimately shape the different types of cell death. These studies have highlighted the complex mechanisms tipping the balance between different cell fates. Here, we summarize the latest discoveries in the three most well understood modalities of cell death, namely, apoptosis, necroptosis, and pyroptosis, highlighting common and unique pathways and their effect on the surrounding cells and the organism as a whole.
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Affiliation(s)
- Damien Bertheloot
- Institute of Innate Immunity, University Hospitals Bonn, University of Bonn, Bonn, NRW, Germany.
| | - Eicke Latz
- Institute of Innate Immunity, University Hospitals Bonn, University of Bonn, Bonn, NRW, Germany
- Department of Infectious Diseases and Immunology, University of Massachusetts Medical School, Worcester, MA, USA
- German Center for Neurodegenerative Diseases, Bonn, NRW, Germany
| | - Bernardo S Franklin
- Institute of Innate Immunity, University Hospitals Bonn, University of Bonn, Bonn, NRW, Germany.
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7
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Plasma Membrane Ca 2+ ATPase Isoform 4 (PMCA4) Has an Important Role in Numerous Hallmarks of Pancreatic Cancer. Cancers (Basel) 2020; 12:cancers12010218. [PMID: 31963119 PMCID: PMC7016988 DOI: 10.3390/cancers12010218] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/08/2020] [Accepted: 01/10/2020] [Indexed: 12/12/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is largely resistant to standard treatments leading to poor patient survival. The expression of plasma membrane calcium ATPase-4 (PMCA4) is reported to modulate key cancer hallmarks including cell migration, growth, and apoptotic resistance. Data-mining revealed that PMCA4 was over-expressed in pancreatic ductal adenocarcinoma (PDAC) tumors which correlated with poor patient survival. Western blot and RT-qPCR revealed that MIA PaCa-2 cells almost exclusively express PMCA4 making these a suitable cellular model of PDAC with poor patient survival. Knockdown of PMCA4 in MIA PaCa-2 cells (using siRNA) reduced cytosolic Ca2+ ([Ca2+]i) clearance, cell migration, and sensitized cells to apoptosis, without affecting cell growth. Knocking down PMCA4 had minimal effects on numerous metabolic parameters (as assessed using the Seahorse XF analyzer). In summary, this study provides the first evidence that PMCA4 is over-expressed in PDAC and plays a role in cell migration and apoptotic resistance in MIA PaCa-2 cells. This suggests that PMCA4 may offer an attractive novel therapeutic target in PDAC.
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8
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Tanzer MC, Frauenstein A, Stafford CA, Phulphagar K, Mann M, Meissner F. Quantitative and Dynamic Catalogs of Proteins Released during Apoptotic and Necroptotic Cell Death. Cell Rep 2020; 30:1260-1270.e5. [DOI: 10.1016/j.celrep.2019.12.079] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 11/07/2019] [Accepted: 12/19/2019] [Indexed: 12/16/2022] Open
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9
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Rivera OC, Hennigar SR, Kelleher SL. ZnT2 is critical for lysosome acidification and biogenesis during mammary gland involution. Am J Physiol Regul Integr Comp Physiol 2018; 315:R323-R335. [PMID: 29718697 DOI: 10.1152/ajpregu.00444.2017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Mammary gland involution, a tightly regulated process of tissue remodeling by which a lactating mammary gland reverts to the prepregnant state, is characterized by the most profound example of regulated epithelial cell death in normal tissue. Defects in the execution of involution are associated with lactation failure and breast cancer. Initiation of mammary gland involution requires upregulation of lysosome biogenesis and acidification to activate lysosome-mediated cell death; however, specific mediators of this initial phase of involution are not well described. Zinc transporter 2 [ZnT2 ( SLC30A2)] has been implicated in lysosome biogenesis and lysosome-mediated cell death during involution; however, the direct role of ZnT2 in this process has not been elucidated. Here we showed that ZnT2-null mice had impaired alveolar regression and reduced activation of the involution marker phosphorylated Stat3, indicating insufficient initiation of mammary gland remodeling during involution. Moreover, we found that the loss of ZnT2 inhibited assembly of the proton transporter vacuolar ATPase on lysosomes, thereby decreasing lysosome abundance and size. Studies in cultured mammary epithelial cells revealed that while the involution signal TNFα promoted lysosome biogenesis and acidification, attenuation of ZnT2 impaired the lysosome response to this involution signal, which was not a consequence of cytoplasmic Zn accumulation. Our findings establish ZnT2 as a novel regulator of vacuolar ATPase assembly, driving lysosome biogenesis, acidification, and tissue remodeling during the initiation of mammary gland involution.
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Affiliation(s)
- Olivia C Rivera
- Department of Cellular and Molecular Physiology, Penn State Hershey College of Medicine , Hershey, Pennsylvania
| | - Stephen R Hennigar
- Department of Nutritional Sciences, Pennsylvania State University , University Park, Pennsylvania
| | - Shannon L Kelleher
- Department of Cellular and Molecular Physiology, Penn State Hershey College of Medicine , Hershey, Pennsylvania.,Department of Surgery, Penn State Hershey College of Medicine , Hershey, Pennsylvania.,Department of Pharmacology, Penn State Hershey College of Medicine , Hershey, Pennsylvania.,Department of Nutritional Sciences, Pennsylvania State University , University Park, Pennsylvania
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10
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Wiwatpanit T, Remis NN, Ahmad A, Zhou Y, Clancy JC, Cheatham MA, García-Añoveros J. Codeficiency of Lysosomal Mucolipins 3 and 1 in Cochlear Hair Cells Diminishes Outer Hair Cell Longevity and Accelerates Age-Related Hearing Loss. J Neurosci 2018; 38:3177-3189. [PMID: 29453205 PMCID: PMC5884457 DOI: 10.1523/jneurosci.3368-17.2018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 01/16/2018] [Accepted: 02/02/2018] [Indexed: 01/11/2023] Open
Abstract
Acquired hearing loss is the predominant neurodegenerative condition associated with aging in humans. Although mutations on several genes are known to cause congenital deafness in newborns, few genes have been implicated in age-related hearing loss (ARHL), perhaps because its cause is likely polygenic. Here, we generated mice lacking lysosomal calcium channel mucolipins 3 and 1 and discovered that both male and female mice suffered a polygenic form of hearing loss. Whereas mucolipin 1 is ubiquitously expressed in all cells, mucolipin 3 is expressed in a small subset of cochlear cells, hair cells (HCs) and marginal cells of the stria vascularis, and very few other cell types. Mice lacking both mucolipins 3 and 1, but not either one alone, experienced hearing loss as early as at 1 month of age. The severity of hearing impairment progressed from high to low frequencies and increased with age. Early onset of ARHL in these mice was accompanied by outer HC (OHC) loss. Adult mice conditionally lacking mucolipins in HCs exhibited comparable auditory phenotypes, thereby revealing that the reason for OHC loss is mucolipin codeficiency in the HCs and not in the stria vascularis. Furthermore, we observed that OHCs lacking mucolipins contained abnormally enlarged lysosomes aggregated at the apical region of the cell, whereas other organelles appeared normal. We also demonstrated that these aberrant lysosomes in OHCs lost their membrane integrity through lysosomal membrane permeabilization, a known cause of cellular toxicity that explains why and how OHCs die, leading to premature ARHL.SIGNIFICANCE STATEMENT Presbycusis, or age-related hearing loss (ARHL), is a common characteristic of aging in mammals. Although many genes have been identified to cause deafness from birth in both humans and mice, only a few are known to associate with progressive ARHL, the most prevalent form of deafness. We have found that mice lacking two lysosomal channels, mucolipins 3 and 1, suffer accelerated ARHL due to auditory outer hair cell degeneration, the most common cause of hearing loss and neurodegenerative condition in humans. Lysosomes lacking mucolipins undergo organelle membrane permeabilization and promote cytotoxicity with age, revealing a novel mechanism of outer hair cell degeneration and ARHL. These results underscore the importance of lysosomes in hair cell survival and the maintenance of hearing.
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Affiliation(s)
- Teerawat Wiwatpanit
- Driskill Graduate Program in Life Sciences, Northwestern University, Chicago, Illinois 60611
- Department of Anesthesiology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois 60611
| | - Natalie N Remis
- Driskill Graduate Program in Life Sciences, Northwestern University, Chicago, Illinois 60611
- Department of Anesthesiology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois 60611
| | - Aisha Ahmad
- Communication Sciences and Disorders Knowles Hearing Center, Northwestern University, Evanston, Illinois 60208
| | - Yingjie Zhou
- Communication Sciences and Disorders Knowles Hearing Center, Northwestern University, Evanston, Illinois 60208
| | - John C Clancy
- Department of Anesthesiology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois 60611
| | - Mary Ann Cheatham
- Communication Sciences and Disorders Knowles Hearing Center, Northwestern University, Evanston, Illinois 60208
- Hugh Knowles Center for Clinical and Basic Science in Hearing and Its Disorders, Northwestern University, Chicago, Illinois 60611, and
| | - Jaime García-Añoveros
- Driskill Graduate Program in Life Sciences, Northwestern University, Chicago, Illinois 60611,
- Department of Anesthesiology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois 60611
- Hugh Knowles Center for Clinical and Basic Science in Hearing and Its Disorders, Northwestern University, Chicago, Illinois 60611, and
- Departments of Neurology and Physiology, Northwestern University, Feinberg School of Medicine, Chicago, Illinois 60611
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11
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Wu Y, Liu ZG, Shi MQ, Yu HZ, Jiang XY, Yang AH, Fu XS, Xu Y, Yang S, Ni H, Shen SJ, Li WD. Identification of ACTG2 functions as a promoter gene in hepatocellular carcinoma cells migration and tumor metastasis. Biochem Biophys Res Commun 2017; 491:537-544. [DOI: 10.1016/j.bbrc.2017.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 04/02/2017] [Indexed: 11/28/2022]
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12
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Stafford N, Wilson C, Oceandy D, Neyses L, Cartwright EJ. The Plasma Membrane Calcium ATPases and Their Role as Major New Players in Human Disease. Physiol Rev 2017; 97:1089-1125. [PMID: 28566538 DOI: 10.1152/physrev.00028.2016] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 01/20/2017] [Accepted: 01/23/2017] [Indexed: 02/07/2023] Open
Abstract
The Ca2+ extrusion function of the four mammalian isoforms of the plasma membrane calcium ATPases (PMCAs) is well established. There is also ever-increasing detail known of their roles in global and local Ca2+ homeostasis and intracellular Ca2+ signaling in a wide variety of cell types and tissues. It is becoming clear that the spatiotemporal patterns of expression of the PMCAs and the fact that their abundances and relative expression levels vary from cell type to cell type both reflect and impact on their specific functions in these cells. Over recent years it has become increasingly apparent that these genes have potentially significant roles in human health and disease, with PMCAs1-4 being associated with cardiovascular diseases, deafness, autism, ataxia, adenoma, and malarial resistance. This review will bring together evidence of the variety of tissue-specific functions of PMCAs and will highlight the roles these genes play in regulating normal physiological functions and the considerable impact the genes have on human disease.
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Affiliation(s)
- Nicholas Stafford
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Claire Wilson
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Delvac Oceandy
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Ludwig Neyses
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
| | - Elizabeth J Cartwright
- Division of Cardiovascular Sciences, University of Manchester, Manchester, United Kingdom
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13
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Cinnamomum verum ingredient 2-methoxycinnamaldehyde: a new antiproliferative drug targeting topoisomerase I and II in human lung squamous cell carcinoma NCI-H520 cells. Eur J Cancer Prev 2017; 26:314-323. [DOI: 10.1097/cej.0000000000000265] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Abstract
The PMCA is an ATP-driven Ca2+ pump critical for the maintenance of low cytosolic calcium. The PMCA has an important but paradoxical role in cell death and survival. The PMCA can be differentially regulated by caspase/calpain cleavage. Glycolytic ATP supply may be sufficient to fuel the PMCA during metabolic stress. The ATP sensitivity of the PMCA can be regulated by acidic phospholipids.
The plasma membrane Ca2+-ATPase (PMCA) is a ubiquitously expressed, ATP-driven Ca2+ pump that is critical for maintaining low resting cytosolic Ca2+ ([Ca2+]i) in all eukaryotic cells. Since cytotoxic Ca2+ overload has such a central role in cell death, the PMCA represents an essential “linchpin” for the delicate balance between cell survival and cell death. In general, impaired PMCA activity and reduced PMCA expression leads to cytotoxic Ca2+ overload and Ca2+ dependent cell death, both apoptosis and necrosis, whereas maintenance of PMCA activity or PMCA overexpression is generally accepted as being cytoprotective. However, the PMCA has a paradoxical role in cell death depending on the cell type and cellular context. The PMCA can be differentially regulated by Ca2+-dependent proteolysis, can be maintained by a localised glycolytic ATP supply, even in the face of global ATP depletion, and can be profoundly affected by the specific phospholipid environment that it sits within the membrane. The major focus of this review is to highlight some of the controversies surrounding the paradoxical role of the PMCA in cell death and survival, challenging the conventional view of ATP-dependent regulation of the PMCA and how this might influence cell fate.
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Affiliation(s)
- Jason I E Bruce
- Division of Molecular & Clinical Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, United Kingdom.
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15
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Tsai KD, Cherng J, Liu YH, Chen TW, Wong HY, Yang SM, Chou KS, Cherng JM. Cinnamomum verum component 2-methoxycinnamaldehyde: a novel antiproliferative drug inducing cell death through targeting both topoisomerase I and II in human colorectal adenocarcinoma COLO 205 cells. Food Nutr Res 2016; 60:31607. [PMID: 27281694 PMCID: PMC4899521 DOI: 10.3402/fnr.v60.31607] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 05/05/2016] [Accepted: 05/11/2016] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Cinnamomum verum is used to manufacture the spice cinnamon. In addition, the plant has been used as a Chinese herbal medication. METHODS We investigated the antiproliferative effect of 2-methoxycinnamaldehyde (2-MCA), a constituent of the cortex of the plant, and the molecular biomarkers associated with tumorigenesis in human colorectal adenocarcinoma COLO 205 cells. Specifically, cell viability was evaluated by colorimetric assay; apoptosis was determined by flow cytometry and morphological analysis with bright field, acridine orange, and neutral red stainings, as well as comet assay; topoisomerase I activity was determined by assay based upon DNA relaxation and topoisomerase II by DNA relaxation plus decatentation of kinetoplast DNA; lysosomal vacuolation and volume of acidic compartments (VACs) were determined by neutral red staining. RESULTS The results demonstrate that 2-MCA inhibited proliferation and induced apoptosis as implicated by mitochondrial membrane potential (ΔΨm) loss, activation of both caspase-3 and -9, increase of annexin V(+)PI(+) cells, as well as morphological characteristics of apoptosis. Furthermore, 2-MCA also induced lysosomal vacuolation with elevated VAC, cytotoxicity, and inhibitions of topoisomerase I as well as II activities. Additional study demonstrated the antiproliferative effect of 2-MCA found in a nude mice model. CONCLUSIONS Our data implicate that the antiproliferative activity of 2-MCA in vitro involved downregulation of cell growth markers, both topoisomerase I and II, and upregulation of pro-apoptotic molecules, associated with increased lysosomal vacuolation. In vivo 2-MCA reduced the tumor burden that could have significant clinical impact. Indeed, similar effects were found in other tested cell lines, including human hepatocellular carcinoma SK-Hep-1 and Hep 3B, lung adenocarcinoma A549 and squamous cell carcinoma NCI-H520, and T-lymphoblastic MOLT-3 (results not shown). Our data implicate that 2-MCA could be a potential agent for anticancer therapy.
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Affiliation(s)
- Kuen-Daw Tsai
- Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC.,School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan ROC.,Institute of Molecular Biology, National Chung Cheng University, Chiayi, Taiwan ROC
| | - Jonathan Cherng
- Faculty of Medicine, Medical University of Lublin, Lublin, Poland
| | - Yi-Heng Liu
- Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC
| | - Ta-Wei Chen
- Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC
| | - Ho-Yiu Wong
- Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC
| | - Shu-Mei Yang
- Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC.,School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan ROC
| | - Kuo-Shen Chou
- Department of Family Medicine, Saint Mary's Hospital Luodong, Yilan, Taiwan ROC
| | - Jaw-Ming Cherng
- Department of Internal Medicine; Saint Mary's Hospital Luodong, Yilan, Taiwan ROC;
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Cuminaldehyde from Cinnamomum verum Induces Cell Death through Targeting Topoisomerase 1 and 2 in Human Colorectal Adenocarcinoma COLO 205 Cells. Nutrients 2016; 8:nu8060318. [PMID: 27231935 PMCID: PMC4924159 DOI: 10.3390/nu8060318] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Revised: 05/02/2016] [Accepted: 05/18/2016] [Indexed: 02/06/2023] Open
Abstract
Cinnamomum verum, also called true cinnamon tree, is employed to make the seasoning cinnamon. Furthermore, the plant has been used as a traditional Chinese herbal medication. We explored the anticancer effect of cuminaldehyde, an ingredient of the cortex of the plant, as well as the molecular biomarkers associated with carcinogenesis in human colorectal adenocarcinoma COLO 205 cells. The results show that cuminaldehyde suppressed growth and induced apoptosis, as proved by depletion of the mitochondrial membrane potential, activation of both caspase-3 and -9, and morphological features of apoptosis. Moreover, cuminaldehyde also led to lysosomal vacuolation with an upregulated volume of acidic compartment and cytotoxicity, together with inhibitions of both topoisomerase I and II activities. Additional study shows that the anticancer activity of cuminaldehyde was observed in the model of nude mice. Our results suggest that the anticancer activity of cuminaldehyde in vitro involved the suppression of cell proliferative markers, topoisomerase I as well as II, together with increase of pro-apoptotic molecules, associated with upregulated lysosomal vacuolation. On the other hand, in vivo, cuminaldehyde diminished the tumor burden that would have a significant clinical impact. Furthermore, similar effects were observed in other tested cell lines. In short, our data suggest that cuminaldehyde could be a drug for chemopreventive or anticancer therapy.
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Perng DS, Tsai YH, Cherng J, Wang JS, Chou KS, Shih CW, Cherng JM. Discovery of a novel anticancer agent with both anti-topoisomerase I and II activities in hepatocellular carcinoma SK-Hep-1 cells in vitro and in vivo: Cinnamomum verum component 2-methoxycinnamaldehyde. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 10:141-53. [PMID: 26792981 PMCID: PMC4708962 DOI: 10.2147/dddt.s93599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Cinnamomum verum is used to make the spice cinnamon and has been used as a traditional Chinese herbal medicine for various applications. We evaluated the anticancer effect of 2-methoxycinnamaldehyde (2-MCA), a constituent of the bark of the plant, and its underlying molecular biomarkers associated with carcinogenesis in human hepatocellular carcinoma SK-Hep-1 cell line. The results show that 2-MCA suppressed proliferation and induced apoptosis as indicated by mitochondrial membrane potential loss, activation of caspase-3 and caspase-9, increase in the DNA content in sub-G1, and morphological characteristics of apoptosis, including blebbing of plasma membrane, nuclear condensation, fragmentation, apoptotic body formation, and long comet tail. In addition, 2-MCA also induced lysosomal vacuolation with increased volume of acidic compartments, suppressions of nuclear transcription factors NF-κB, cyclooxygenase-2, prostaglandin E2 (PGE2), and both topoisomerase I and II activities in a dose-dependent manner. Further study reveals the growth-inhibitory effect of 2-MCA was also evident in a nude mice model. Taken together, the data suggest that the growth-inhibitory effect of 2-MCA against SK-Hep-1 cells is accompanied by downregulations of NF-κB-binding activity, inflammatory responses involving cyclooxygenase-2 and PGE2, and proliferative control involving apoptosis, both topoisomerase I and II activities, together with an upregulation of lysosomal vacuolation and volume of acidic compartments. Similar effects (including all of the above-mentioned effects) were found in other tested cell lines, including human hepatocellular carcinoma Hep 3B, lung adenocarcinoma A549, squamous cell carcinoma NCI-H520, colorectal adenocarcinoma COLO 205, and T-lymphoblastic MOLT-3 (results not shown). Our data suggest that 2-MCA could be a potential agent for anticancer therapy.
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Affiliation(s)
- Daw-Shyong Perng
- Department of Gastroenterology, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan, Republic of China
| | | | - Jonathan Cherng
- Faculty of Medicine, Medical University of Lublin, Lublin, Poland
| | - Jeng-Shing Wang
- Department of Internal Medicine, Antai Tian-Sheng Memorial Hospital, Pingtung, Taiwan, Republic of China
| | - Kuo-Shen Chou
- Department of Family Medicine, Saint Mary's Hospital Luodong, Yilan, Taiwan, Republic of China
| | - Chia-Wen Shih
- Department of Pathology, Lotung Poh-Ai Hospital, Yilan, Taiwan, Republic of China
| | - Jaw-Ming Cherng
- Department of Internal Medicine, Saint Mary's Hospital Luodong, Yilan, Taiwan, Republic of China
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Perng DS, Tsai YH, Cherng J, Kuo CW, Shiao CC, Cherng JM. Discovery of a novel anti-cancer agent targeting both topoisomerase I and II in hepatocellular carcinoma Hep 3B cells in vitro and in vivo: Cinnamomum verum component 2-methoxycinnamaldehyde. J Drug Target 2016; 24:624-34. [DOI: 10.3109/1061186x.2015.1132221] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Daw-Shyong Perng
- Department of Internal Medicine, E-Da Hospital, I-Shou University, Kaohsiung, Taiwan
| | | | - Jonathan Cherng
- Faculty of Medicine, Medical University of Lublin, Lublin, Poland
| | - Chih-Wei Kuo
- Department of Internal Medicine, Saint Mary’s Hospital Luodong, Yilan, Taiwan
| | - Chih-Chung Shiao
- Department of Internal Medicine, Saint Mary’s Hospital Luodong, Yilan, Taiwan
| | - Jaw-Ming Cherng
- Department of Internal Medicine, Saint Mary’s Hospital Luodong, Yilan, Taiwan
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19
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Yang SM, Tsai KD, Wong HY, Liu YH, Chen TW, Cherng J, Hsu KC, Ang YU, Cherng JM. Molecular Mechanism of Cinnamomum verum Component Cuminaldehyde Inhibits Cell Growth and Induces Cell Death in Human Lung Squamous Cell Carcinoma NCI-H520 Cells In Vitro and In Vivo. J Cancer 2016; 7:251-61. [PMID: 26918037 PMCID: PMC4747878 DOI: 10.7150/jca.13689] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Accepted: 11/13/2015] [Indexed: 02/03/2023] Open
Abstract
Cinnamomum verum is used to make the spice cinnamon and has been used as a traditional Chinese herbal medicine. We evaluated the effects and the molecular mechanisms of cuminaldehyde (CuA), a constituent of the bark of Cinnamomum verum, on human lung squamous cell carcinoma NCI-H520 cells. Specifically, cell viability was evaluated by colorimetric assay; cytotoxicity by LDH release; apoptosis was determined by Western blotting, and morphological analysis with, acridine orange and neutral red stainings and comet assay; topoisomerase I activity was assessed using assay based upon DNA relaxation and topoisomerase II by DNA relaxation plus decatentation of kinetoplast DNA; lysosomal vacuolation and volume of acidic compartments (VAC) were evaluated with neutral red staining. The results show that CuA suppressed proliferation and induced apoptosis as indicated by an up-regulation of pro-apoptotic bax and bak genes and a down-regulation of anti-apoptotic bcl-2 and bcl-XL genes, mitochondrial membrane potential loss, cytochrome c release, activation of caspase 3 and 9, and morphological characteristics of apoptosis, including blebbing of the plasma membrane, nuclear condensation, fragmentation, apoptotic body formation, and comet with elevated tail intensity and moment. In addition, CuA also induced lysosomal vacuolation with increased VAC, cytotoxicity, as well as suppressions of both topoisomerase I and II activities in a dose-dependent manner. Further study revealed the growth-inhibitory effect of CuA was also evident in a nude mice model. Taken together, the data suggest that the growth-inhibitory effect of CuA against NCI-H520 cells is accompanied by downregulations of proliferative control involving apoptosis and both topoisomerase I and II activities, and upregulation of lysosomal with increased VAC and cytotoxicity. Similar effects were found in other cell lines, including human lung adenocarcinoma A549 cells and colorectal adenocarcinoma COLO 205 (results not shown). Our data suggest that CuA could be a potential agent for anticancer therapy.
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Affiliation(s)
- Shu-Mei Yang
- 1. Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC; 2. School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan ROC
| | - Kuen-Daw Tsai
- 1. Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC; 2. School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan ROC; 3. Institute of Molecular Biology, National Chung Cheng University, Chiayi, Taiwan ROC
| | - Ho-Yiu Wong
- 1. Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC
| | - Yi-Heng Liu
- 1. Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC
| | - Ta-Wei Chen
- 1. Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin, Taiwan ROC
| | - Jonathan Cherng
- 4. Faculty of Medicine, Medical University of Lublin, Lublin, Poland
| | - Kwang-Ching Hsu
- 5. Department of Internal Medicine, Saint Mary's Hospital Luodong, Yilan, Taiwan ROC
| | - Yao-Uh Ang
- 5. Department of Internal Medicine, Saint Mary's Hospital Luodong, Yilan, Taiwan ROC
| | - Jaw-Ming Cherng
- 5. Department of Internal Medicine, Saint Mary's Hospital Luodong, Yilan, Taiwan ROC
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20
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Wong HY, Tsai KD, Liu YH, Yang SM, Chen TW, Cherng J, Chou KS, Chang CM, Yao BT, Cherng JM. Cinnamomum verumComponent 2-Methoxycinnamaldehyde: A Novel Anticancer Agent with Both Anti-Topoisomerase I and II Activities in Human Lung Adenocarcinoma A549 CellsIn VitroandIn Vivo. Phytother Res 2015; 30:331-40. [PMID: 26676220 DOI: 10.1002/ptr.5536] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 10/18/2015] [Accepted: 11/11/2015] [Indexed: 12/29/2022]
Affiliation(s)
- Ho-Yiu Wong
- Department of Internal Medicine; China Medical University Beigang Hospital; Yunlin 65152 Taiwan
| | - Kuen-daw Tsai
- Department of Internal Medicine; China Medical University Beigang Hospital; Yunlin 65152 Taiwan
- School of Chinese Medicine, College of Chinese Medicine; China Medical University; Taichung 40402 Taiwan
- Institute of Molecular Biology; National Chung Cheng University; Chiayi 62102 Taiwan
| | - Yi-Heng Liu
- Department of Internal Medicine; China Medical University Beigang Hospital; Yunlin 65152 Taiwan
| | - Shu-mei Yang
- Department of Internal Medicine; China Medical University Beigang Hospital; Yunlin 65152 Taiwan
- School of Chinese Medicine, College of Chinese Medicine; China Medical University; Taichung 40402 Taiwan
| | - Ta-Wei Chen
- Department of Internal Medicine; China Medical University Beigang Hospital; Yunlin 65152 Taiwan
| | - Jonathan Cherng
- Faculty of Medicine; Medical University of Lublin; Lublin Poland
| | - Kuo-Shen Chou
- Department of Family Medicine; Saint Mary's Hospital Luodong; Yilan 26546 Taiwan
| | - Chen-Mei Chang
- Department of Internal Medicine; Saint Mary's Hospital Luodong; Yilan 26546 Taiwan
| | - Belen T. Yao
- Department of Internal Medicine; Saint Mary's Hospital Luodong; Yilan 26546 Taiwan
| | - Jaw-Ming Cherng
- Department of Internal Medicine; Saint Mary's Hospital Luodong; Yilan 26546 Taiwan
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21
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Yu M, Wu X, Lin B, Han J, Yang L, Han S. Lysosomal pH Decrease in Inflammatory Cells Used To Enable Activatable Imaging of Inflammation with a Sialic Acid Conjugated Profluorophore. Anal Chem 2015; 87:6688-95. [DOI: 10.1021/acs.analchem.5b00847] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Mingzhu Yu
- Department
of Chemical Biology, College of Chemistry and Chemical Engineering,
State Key Laboratory for Physical Chemistry of Solid Surfaces, the
Key Laboratory for Chemical Biology of Fujian Province, the MOE Key
Laboratory of Spectrochemical Analysis and Instrumentation, and Innovation
Center for Cell Signaling Network, and ‡State Key Laboratory of Cellular
Stress Biology, Innovation Center for Cell Signaling Network, School
of Life Sciences, Xiamen University, Xiamen, 361005, China
| | - Xuanjun Wu
- Department
of Chemical Biology, College of Chemistry and Chemical Engineering,
State Key Laboratory for Physical Chemistry of Solid Surfaces, the
Key Laboratory for Chemical Biology of Fujian Province, the MOE Key
Laboratory of Spectrochemical Analysis and Instrumentation, and Innovation
Center for Cell Signaling Network, and ‡State Key Laboratory of Cellular
Stress Biology, Innovation Center for Cell Signaling Network, School
of Life Sciences, Xiamen University, Xiamen, 361005, China
| | - Bijuan Lin
- Department
of Chemical Biology, College of Chemistry and Chemical Engineering,
State Key Laboratory for Physical Chemistry of Solid Surfaces, the
Key Laboratory for Chemical Biology of Fujian Province, the MOE Key
Laboratory of Spectrochemical Analysis and Instrumentation, and Innovation
Center for Cell Signaling Network, and ‡State Key Laboratory of Cellular
Stress Biology, Innovation Center for Cell Signaling Network, School
of Life Sciences, Xiamen University, Xiamen, 361005, China
| | - Jiahuai Han
- Department
of Chemical Biology, College of Chemistry and Chemical Engineering,
State Key Laboratory for Physical Chemistry of Solid Surfaces, the
Key Laboratory for Chemical Biology of Fujian Province, the MOE Key
Laboratory of Spectrochemical Analysis and Instrumentation, and Innovation
Center for Cell Signaling Network, and ‡State Key Laboratory of Cellular
Stress Biology, Innovation Center for Cell Signaling Network, School
of Life Sciences, Xiamen University, Xiamen, 361005, China
| | - Liu Yang
- Department
of Chemical Biology, College of Chemistry and Chemical Engineering,
State Key Laboratory for Physical Chemistry of Solid Surfaces, the
Key Laboratory for Chemical Biology of Fujian Province, the MOE Key
Laboratory of Spectrochemical Analysis and Instrumentation, and Innovation
Center for Cell Signaling Network, and ‡State Key Laboratory of Cellular
Stress Biology, Innovation Center for Cell Signaling Network, School
of Life Sciences, Xiamen University, Xiamen, 361005, China
| | - Shoufa Han
- Department
of Chemical Biology, College of Chemistry and Chemical Engineering,
State Key Laboratory for Physical Chemistry of Solid Surfaces, the
Key Laboratory for Chemical Biology of Fujian Province, the MOE Key
Laboratory of Spectrochemical Analysis and Instrumentation, and Innovation
Center for Cell Signaling Network, and ‡State Key Laboratory of Cellular
Stress Biology, Innovation Center for Cell Signaling Network, School
of Life Sciences, Xiamen University, Xiamen, 361005, China
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22
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Liu WJ, Xu BH, Ye L, Liang D, Wu HL, Zheng YY, Deng JK, Li B, Liu HF. Urinary proteins induce lysosomal membrane permeabilization and lysosomal dysfunction in renal tubular epithelial cells. Am J Physiol Renal Physiol 2015; 308:F639-49. [PMID: 25587119 DOI: 10.1152/ajprenal.00383.2014] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Lysosomal membrane permeabilization (LMP) has been shown to cause the release of cathepsins and other hydrolases from the lysosomal lumen to the cytosol and initiate a cell death pathway. Whether proteinuria triggers LMP in renal tubular epithelial cells (TECs) to accelerate the progression of renal tubulointerstitial injury remains unclear. In the present study, we evaluated TEC injury as well as changes in lysosomal number, volume, activity, and membrane integrity after urinary protein overload in vivo and in vitro. Our results revealed that neutrophil gelatinase-associated lipocalin and kidney injury molecule-1 levels were significantly increased in the urine of patients with minimal change nephrotic syndrome (MCNS) and the culture supernatant of HK-2 cells treated by urinary proteins extracted from MCNS patients. Urinary protein overload also induced apoptotic cell death in HK-2 cells. Importantly, we found that lysosomal volume and number were markedly increased in TECs of patients with MCNS and HK-2 cells overloaded with urinary proteins. However, lysosome function, as assessed by proteolytic degradation of DQ-ovalbumin and cathepsin-B and cathepsin-L activities, was decreased in HK-2 cells overloaded with urinary proteins. Furthermore, urinary protein overload led to a diffuse cytoplasmic immunostaining pattern of cathepsin-B and irregular immunostaining of lysosome-associated membrane protein-1, accompanying a reduction in intracellular acidic components, which could be improved by pretreatment with antioxidant. Taken together, our results indicate that overloading of urinary proteins caused LMP and lysosomal dysfunction at least partly via oxidative stress in TECs.
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Affiliation(s)
- Wei Jing Liu
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Bi-Hua Xu
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Lin Ye
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Dong Liang
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Hong-Luan Wu
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Yuan-Yuan Zheng
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Jian Kun Deng
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Benyi Li
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
| | - Hua-feng Liu
- Institute of Nephrology, Guangdong Medical College, Zhanjiang, China
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Li L, Chen W, Liang Y, Ma H, Li W, Zhou Z, Li J, Ding Y, Ren J, Lin J, Han F, Wu J, Han J. The Gβγ-Src signaling pathway regulates TNF-induced necroptosis via control of necrosome translocation. Cell Res 2014; 24:417-32. [PMID: 24513853 DOI: 10.1038/cr.2014.17] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 11/20/2013] [Accepted: 11/26/2013] [Indexed: 12/21/2022] Open
Abstract
Formation of multi-component signaling complex necrosomes is essential for tumor necrosis factor α (TNF)-induced programmed necrosis (also called necroptosis). However, the mechanisms of necroptosis are still largely unknown. We isolated a TNF-resistant L929 mutant cell line generated by retrovirus insertion and identified that disruption of the guanine nucleotide-binding protein γ 10 (Gγ10) gene is responsible for this phenotype. We further show that Gγ10 is involved in TNF-induced necroptosis and Gβ2 is the partner of Gγ10. Src is the downstream effector of Gβ2γ10 in TNF-induced necroptosis because TNF-induced Src activation was impaired upon Gγ10 knockdown. Gγ10 does not affect TNF-induced activation of NF-κB and MAPKs and the formation of necrosomes, but is required for trafficking of necrosomes to their potential functioning site, an unidentified subcellular organelle that can be fractionated into heterotypic membrane fractions. The TNF-induced Gβγ-Src signaling pathway is independent of RIP1/RIP3 kinase activity and necrosome formation, but is required for the necrosome to function.
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Affiliation(s)
- Lisheng Li
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Wanze Chen
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Yaoji Liang
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Huabin Ma
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Wenjuan Li
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Zhenru Zhou
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Jie Li
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Yan Ding
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Junming Ren
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Juan Lin
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Felicia Han
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Jianfeng Wu
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
| | - Jiahuai Han
- State Key Laboratory of Cellular Stress Biology, Innovation Center for Cell Biology, School of Life Sciences, Xiamen University, Xiamen, China
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24
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Fan J, Dong H, Hu M, Wang J, Zhang H, Zhu H, Sun W, Peng X. Fluorescence imaging lysosomal changes during cell division and apoptosis observed using Nile Blue based near-infrared emission. Chem Commun (Camb) 2014; 50:882-4. [DOI: 10.1039/c3cc48043g] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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25
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Chen W, Tsai PH, Hung Y, Chiou SH, Mou CY. Nonviral cell labeling and differentiation agent for induced pluripotent stem cells based on mesoporous silica nanoparticles. ACS NANO 2013; 7:8423-8440. [PMID: 24063246 DOI: 10.1021/nn401418n] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The generation of induced pluripotent stem cells (iPSCs) is an innovative personalized-regenerative technology, which can transform own-self somatic cells into embryonic stem (ES)-like cells, which have the potential to differentiate into all cell types of three dermal lineages. However, how to quickly, efficiently, and safely produce specific-lineage differentiation from pluripotent-state cells and iPSCs is still an open question. The objective of the present study was to develop a platform of a nonviral gene delivery system of mesoporous silica nanoparticles (MSNs) to rapidly generate iPSC-derived definitive-lineage cells, including endodermal-differentiated cells. We also evaluated the feasibility and efficiency of FITC-conjugated MSNs (FMSNs) for labeling of iPSCs and utilized the multifunctional properties of FMSNs for a suitable carrier for biomolecule delivery. We showed that FMSNs of various surface charges could be efficiently internalized by iPSCs without causing cytotoxicity. The levels of reactive oxygen species and pluripotent status, including in vitro stemness signatures and in vivo teratoma formation, remained unaltered. Notably, positive-charged FMSN enhanced cellular uptake efficiency and retention time. Moreover, when using positive-charged FMSN to deliver hepatocyte nuclear factor 3β (HNF3β) plasmid DNA (pDNA), the treated iPSCs exhibited significantly improved definitive endoderm formation and further quickly differentiated into hepatocyte-like cells with mature functions (low-density lipoprotein uptake and glycogen storage) within 2 weeks in vitro. Double delivery of pHNF3β further improved mRNA expression levels of liver-specific genes. These findings reveal the multiple advantages of FMSNs to serve as ideal vectors not only for stem cell labeling but also for safe gene delivery to promote the production of hepatocyte-like cells from iPSCs.
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Affiliation(s)
- Wei Chen
- Department of Chemistry, National Taiwan University , Taipei 106, Taiwan
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26
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Yanes RE, Tarn D, Hwang AA, Ferris DP, Sherman SP, Thomas CR, Lu J, Pyle AD, Zink JI, Tamanoi F. Involvement of lysosomal exocytosis in the excretion of mesoporous silica nanoparticles and enhancement of the drug delivery effect by exocytosis inhibition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:697-704. [PMID: 23152124 PMCID: PMC3767416 DOI: 10.1002/smll.201201811] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Indexed: 05/22/2023]
Abstract
The exocytosis of phosphonate modified mesoporous silica nanoparticles (P-MSNs) is demonstrated and lysosomal exocytosis is identified as the mechanism responsible for this event. Regulation of P-MSN exocytosis can be achieved by inhibiting or accelerating lysosomal exocytosis. Slowing down P-MSN exocytosis enhances the drug delivery effect of CPT-loaded P-MSNs by improving cell killing.
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Affiliation(s)
- Rolando E Yanes
- Department of Microbiology, California NanoSystems Institute, Jonsson Comprehensive Cancer Center, University of California, Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095, USA
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Strehler EE. Plasma membrane calcium ATPases as novel candidates for therapeutic agent development. JOURNAL OF PHARMACY & PHARMACEUTICAL SCIENCES : A PUBLICATION OF THE CANADIAN SOCIETY FOR PHARMACEUTICAL SCIENCES, SOCIETE CANADIENNE DES SCIENCES PHARMACEUTIQUES 2013; 16:190-206. [PMID: 23958189 PMCID: PMC3869240 DOI: 10.18433/j3z011] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Plasma membrane Ca2+ ATPases (PMCAs) are highly regulated transporters responsible for Ca2+ extrusion from all eukaryotic cells. Different PMCA isoforms are implicated in various tasks of Ca2+ regulation including bulk Ca2+ transport and localized Ca2+ signaling in specific membrane microdomains. Accumulating evidence shows that loss, mutation or inappropriate expression of different PMCAs is associated with pathologies ranging from hypertension, low bone density and male infertility to hearing loss and cerebellar ataxia. Compared to Ca2+ influx channels, PMCAs have lagged far behind as targets for drug development, mainly due to the lack of detailed understanding of their structure and specific function. This is rapidly changing thanks to integrated efforts combining biochemical, structural, cellular and physiological studies suggesting that selective modulation of PMCA isoforms may be of therapeutic value in the management of different and complex diseases. Both structurally informed rational design and high-throughput small molecule library screenings are promising strategies that are expected to lead to specific and isoform-selective modulators of PMCA function. This short review will provide an overview of the diverse roles played by PMCA isoforms in different cells and tissues and their emerging involvement in pathophysiological processes, summarize recent progress in obtaining structural information on the PMCAs, and discuss current and future strategies to develop specific PMCA inhibitors and activators for potential therapeutic applications.
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Affiliation(s)
- Emanuel E Strehler
- Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, MN, USA.
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Identification of cytoskeleton-associated proteins essential for lysosomal stability and survival of human cancer cells. PLoS One 2012; 7:e45381. [PMID: 23071517 PMCID: PMC3469574 DOI: 10.1371/journal.pone.0045381] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Accepted: 08/17/2012] [Indexed: 11/19/2022] Open
Abstract
Microtubule-disturbing drugs inhibit lysosomal trafficking and induce lysosomal membrane permeabilization followed by cathepsin-dependent cell death. To identify specific trafficking-related proteins that control cell survival and lysosomal stability, we screened a molecular motor siRNA library in human MCF7 breast cancer cells. SiRNAs targeting four kinesins (KIF11/Eg5, KIF20A, KIF21A, KIF25), myosin 1G (MYO1G), myosin heavy chain 1 (MYH1) and tropomyosin 2 (TPM2) were identified as effective inducers of non-apoptotic cell death. The cell death induced by KIF11, KIF21A, KIF25, MYH1 or TPM2 siRNAs was preceded by lysosomal membrane permeabilization, and all identified siRNAs induced several changes in the endo-lysosomal compartment, i.e. increased lysosomal volume (KIF11, KIF20A, KIF25, MYO1G, MYH1), increased cysteine cathepsin activity (KIF20A, KIF25), altered lysosomal localization (KIF25, MYH1, TPM2), increased dextran accumulation (KIF20A), or reduced autophagic flux (MYO1G, MYH1). Importantly, all seven siRNAs also killed human cervix cancer (HeLa) and osteosarcoma (U-2-OS) cells and sensitized cancer cells to other lysosome-destabilizing treatments, i.e. photo-oxidation, siramesine, etoposide or cisplatin. Similarly to KIF11 siRNA, the KIF11 inhibitor monastrol induced lysosomal membrane permeabilization and sensitized several cancer cell lines to siramesine. While KIF11 inhibitors are under clinical development as mitotic blockers, our data reveal a new function for KIF11 in controlling lysosomal stability and introduce six other molecular motors as putative cancer drug targets.
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Abad C, Proverbio T, Piñero S, Botana D, Chiarello DI, Marín R, Proverbio F. Preeclampsia, Placenta, Oxidative Stress, and PMCA. Hypertens Pregnancy 2012; 31:427-41. [DOI: 10.3109/10641955.2012.690058] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Chloroquine-mediated lysosomal dysfunction enhances the anticancer effect of nutrient deprivation. Pharm Res 2012; 29:2249-63. [PMID: 22538436 DOI: 10.1007/s11095-012-0753-1] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Accepted: 04/02/2012] [Indexed: 12/12/2022]
Abstract
PURPOSE To investigate the ability of chloroquine, a lysosomotropic autophagy inhibitor, to enhance the anticancer effect of nutrient deprivation. METHODS Serum-deprived U251 glioma, B16 melanoma and L929 fibrosarcoma cells were treated with chloroquine in vitro. Cell viability was measured by crystal violet and MTT assay. Oxidative stress, apoptosis/necrosis and intracellular acidification were analyzed by flow cytometry. Cell morphology was examined by light and electron microscopy. Activation of AMP-activated protein kinase (AMPK) and autophagy were monitored by immunoblotting. RNA interference was used for AMPK and LC3b knockdown. The anticancer efficiency of intraperitoneal chloroquine in calorie-restricted mice was assessed using a B16 mouse melanoma model. RESULTS Chloroquine rapidly killed serum-starved cancer cells in vitro. This effect was not mimicked by autophagy inhibitors or LC3b shRNA, indicating autophagy-independent mechanism. Chloroquine-induced lysosomal accumulation and oxidative stress, leading to mitochondrial depolarization, caspase activation and mixed apoptotic/necrotic cell death, were prevented by lysosomal acidification inhibitor bafilomycin. AMPK downregulation participated in chloroquine action, as AMPK activation reduced, and AMPK shRNA mimicked chloroquine toxicity. Chloroquine inhibited melanoma growth in calorie-restricted mice, causing lysosomal accumulation, mitochondrial disintegration and selective necrosis of tumor cells. CONCLUSION Combined treatment with chloroquine and calorie restriction might be useful in cancer therapy.
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Qu H, Jiang X, Shi Z, Liu L, Zhang S. Fast loading ester fluorescent Ca2+ and pH indicators into pollen of Pyrus pyrifolia. JOURNAL OF PLANT RESEARCH 2012; 125:185-95. [PMID: 21789557 DOI: 10.1007/s10265-011-0440-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2011] [Accepted: 05/23/2011] [Indexed: 05/23/2023]
Abstract
Loading of Ca(2+)-sensitive fluorescent probes into plant cells is an essential step to measure activities of free Ca(2+) ions in cytoplasm with a fluorescent imaging technique. Fluo-3 is one of the most suitable Ca(2+) indicators for CLSM. We loaded pollen with fluo-3/AM at three different temperatures. Fluo-3/AM was successfully loaded into pollen at both low (4°C) and high (37°C) temperatures. However, high loading temperature was best suited for pollen, because germination rate of pollen and growth of pollen tubes were relatively little impaired and loading time was shortened. Moreover, Ca(2+) distribution increased in the three apertures of pollen after hydration and showed a Ca(2+) gradient, similar to the tip of growing pollen tubes. The same protocol can be used with the AM-forms of other fluorescent dyes for effective labeling. When loading BCECF-AM into pollen at high temperature, the pollen did not show a pH gradient after hydration. Ca(2+) activities and fluxes had the same periodicity as pollen germination, but pH did not show the same phase and mostly lagged behind. However, the clear zone was alkaline when pollen tube growth was slowed or stopped and turned acidic when growth recovered. It is likely that apical pH(i) regulated pollen tube growth.
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Affiliation(s)
- Haiyong Qu
- College of Horticulture, Nanjing Agricultural University, No.1. WeiGang, Nanjing, Jiangsu, China.
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32
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Programmed necrosis: backup to and competitor with apoptosis in the immune system. Nat Immunol 2011; 12:1143-9. [PMID: 22089220 DOI: 10.1038/ni.2159] [Citation(s) in RCA: 273] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Programmed cell death is essential for the development and maintenance of the immune system and its responses to exogenous and endogenous stimuli. Studies have demonstrated that in addition to caspase-dependent apoptosis, necrosis dependent on the kinases RIP1 and RIP3 (also called necroptosis) is a major programmed cell-death pathway in development and immunity. These two programmed cell-death pathways may suppress each other, and necroptosis also serves as an alternative when caspase-dependent apoptosis is inhibited or absent. Here we summarize recent advancements that have identified the molecular mechanisms that underlie necroptosis and explore the mechanisms that regulate the interplay between apoptosis and necroptosis.
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Ramadan JW, Steiner SR, O'Neill CM, Nunemaker CS. The central role of calcium in the effects of cytokines on beta-cell function: implications for type 1 and type 2 diabetes. Cell Calcium 2011; 50:481-90. [PMID: 21944825 DOI: 10.1016/j.ceca.2011.08.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 07/20/2011] [Accepted: 08/16/2011] [Indexed: 12/29/2022]
Abstract
The appropriate regulation of intracellular calcium is a requirement for proper cell function and survival. This review focuses on the effects of proinflammatory cytokines on calcium regulation in the insulin-producing pancreatic beta-cell and how normal stimulus-secretion coupling, organelle function, and overall beta-cell viability are impacted. Proinflammatory cytokines are increasingly thought to contribute to beta-cell dysfunction not only in type 1 diabetes (T1D), but also in the progression of type 2 diabetes (T2D). Cytokine-induced disruptions in calcium handling result in reduced insulin release in response to glucose stimulation. Cytokines can alter intracellular calcium levels by depleting calcium from the endoplasmic reticulum (ER) and by increasing calcium influx from the extracellular space. Depleting ER calcium leads to protein misfolding and activation of the ER stress response. Disrupting intracellular calcium may also affect organelles, including the mitochondria and the nucleus. As a chronic condition, cytokine-induced calcium disruptions may lead to beta-cell death in T1D and T2D, although possible protective effects are also discussed. Calcium is thus central to both normal and pathological cell processes. Because the tight regulation of intracellular calcium is crucial to homeostasis, measuring the dynamics of calcium may serve as a good indicator of overall beta-cell function.
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Affiliation(s)
- James W Ramadan
- Department of Medicine, University of Virginia, Charlottesville, United States
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Otsuka M, Takata A, Yoshikawa T, Kojima K, Kishikawa T, Shibata C, Takekawa M, Yoshida H, Omata M, Koike K. Receptor for activated protein kinase C: requirement for efficient microRNA function and reduced expression in hepatocellular carcinoma. PLoS One 2011; 6:e24359. [PMID: 21935400 PMCID: PMC3174171 DOI: 10.1371/journal.pone.0024359] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Accepted: 08/07/2011] [Indexed: 11/18/2022] Open
Abstract
MicroRNAs (miRNAs) are important regulators of gene expression that control physiological and pathological processes. A global reduction in miRNA abundance and function is a general trait of human cancers, playing a causal role in the transformed phenotype. Here, we sought to newly identify genes involved in the regulation of miRNA function by performing a genetic screen using reporter constructs that measure miRNA function and retrovirus-based random gene disruption. Of the six genes identified, RACK1, which encodes “receptor for activated protein kinase C” (RACK1), was confirmed to be necessary for full miRNA function. RACK1 binds to KH-type splicing regulatory protein (KSRP), a member of the Dicer complex, and is required for the recruitment of mature miRNAs to the RNA-induced silencing complex (RISC). In addition, RACK1 expression was frequently found to be reduced in hepatocellular carcinoma. These findings suggest the involvement of RACK1 in miRNA function and indicate that reduced miRNA function, due to decreased expression of RACK1, may have pathologically relevant roles in liver cancers.
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Affiliation(s)
- Motoyuki Otsuka
- Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
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Ono K, Wang X, Kim SO, Armstrong LC, Bornstein P, Han J. Metaxin deficiency alters mitochondrial membrane permeability and leads to resistance to TNF-induced cell killing. Protein Cell 2011; 1:161-73. [PMID: 21088703 DOI: 10.1007/s13238-010-0017-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Metaxin, a mitochondrial outer membrane protein, is critical for TNF-induced cell death in L929 cells. Its deficiency, caused by retroviral insertion-mediated mutagenesis, renders L929 cells resistance to TNF killing. In this study, we further characterized metaxin deficiency-caused TNF resistance in parallel with Bcl-X(L) overexpression-mediated death resistance. We did not find obvious change in mitochondria membrane potential in metaxin-deficient (Met(mut)) and Bcl-X(L)-overexpressing cells, but we did find an increase in the release rate of the mitochondrial membrane potential probe rhodamine 123 (Rh123) that was preloaded into mitochondria. In addition, overexpression of a function-interfering mutant of metaxin (MetaΔTM/C) or Bcl-X(L) in MCF-7.3.28 cells also resulted in an acquired resistance to TNF killing and a faster rate of Rh123 release, indicating a close correlation between TNF resistance and higher rates of the dye release from the mitochondria. The release of Rh123 can be controlled by the mitochondrial membrane permeability transition (PT) pore, as targeting an inner membrane component of the PT pore by cyclosporin A (CsA) inhibited Rh123 release. However, metaxin deficiency and Bcl-X(L) overexpression apparently affect Rh123 release from a site(s) different from that of CsA, as CsA can overcome their effect. Though both metaxin and Bcl-X(L) appear to function on the outer mitochondrial membrane, they do not interact with each other. They may use different mechanisms to increase the permeability of Rh123, since previous studies have suggested that metaxin may influence certain outer membrane porins while Bcl-X(L) may form pores on the outer membrane. The alteration of the mitochondrial outer membrane properties by metaxin deficiency and Bcl-X(L) overexpression, as indicated by a quicker Rh123 release, may be helpful in maintaining mitochondrial integrity.
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Affiliation(s)
- Koh Ono
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037, USA
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36
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Li Z, Wu S, Han J, Han S. Imaging of intracellular acidic compartments with a sensitive rhodamine based fluorogenic pH sensor. Analyst 2011; 136:3698-706. [DOI: 10.1039/c1an15108h] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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37
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Kinoshita M, Ono K, Horie T, Nagao K, Nishi H, Kuwabara Y, Takanabe-Mori R, Hasegawa K, Kita T, Kimura T. Regulation of adipocyte differentiation by activation of serotonin (5-HT) receptors 5-HT2AR and 5-HT2CR and involvement of microRNA-448-mediated repression of KLF5. Mol Endocrinol 2010; 24:1978-87. [PMID: 20719859 DOI: 10.1210/me.2010-0054] [Citation(s) in RCA: 117] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Retrovirus insertion-mediated random mutagenesis was applied in 3T3-L1 preadipocyte cells to better understand the molecular basis of obesity (the expansion of individual adipocytes). We found that tryptophan hydroxylase-1, a rate-limiting enzyme for the synthesis of serotonin (5-HT), is expressed in adipocytes and is required for their differentiation. A 5-HT type 2A receptor (5-HT(2A)R) antagonist, ketanserin, and a 5-HT(2c)R antagonist, SB-242084, inhibited adipocyte differentiation. Because 5-HT(2c)R mRNA levels are up-regulated during adipocyte differentiation and micro-RNA (miR)-448 is located in the fourth intron of Htr2c, we also studied the role of miR-448 in 3T3-L1 cells. Through a bioinformatics approach, Krüppel-like factor 5 (KLF5) was identified as a potential target of miR-448. Using a luciferase reporter assay, we confirmed that miR-448 targets the Klf5 3'-intranslated region. Overexpression of miR-448 reduced the expression of Klf5 and adipocyte differentiation, which was confirmed by the reduced expression of adipogenic genes and triglyceride accumulation. To examine the loss of miR-448 function, we constructed a decoy gene that had tandem complementary sequences for miR-448 in the 3'-untranslated region of a luciferase gene under the control of a cytomegalovirus promoter. When the miR-448 decoy gene was introduced into 3T3-L1 preadipocytes, KLF5 was up-regulated and triglyceride concentration was increased. In this study, we identified the regulation of adipocyte differentiation by 5-HT, 5-HT(2A)R, and 5-HT(2C)R. miR-448-mediated repression of KLF5 was identified as a negative regulator for adipocyte differentiation.
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Affiliation(s)
- Minako Kinoshita
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
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Bruce JI. Plasma membrane calcium pump regulation by metabolic stress. World J Biol Chem 2010; 1:221-8. [PMID: 21537477 PMCID: PMC3083969 DOI: 10.4331/wjbc.v1.i7.221] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2010] [Revised: 06/30/2010] [Accepted: 07/07/2010] [Indexed: 02/05/2023] Open
Abstract
The plasma membrane Ca2+-ATPase (PMCA) is an ATP-driven pump that is critical for the maintenance of low resting [Ca2+]i in all eukaryotic cells. Metabolic stress, either due to inhibition of mitochondrial or glycolytic metabolism, has the capacity to cause ATP depletion and thus inhibit PMCA activity. This has potentially fatal consequences, particularly for non-excitable cells in which the PMCA is the major Ca2+ efflux pathway. This is because inhibition of the PMCA inevitably leads to cytosolic Ca2+ overload and the consequent cell death. However, the relationship between metabolic stress, ATP depletion and inhibition of the PMCA is not as simple as one would have originally predicted. There is increasing evidence that metabolic stress can lead to the inhibition of PMCA activity independent of ATP or prior to substantial ATP depletion. In particular, there is evidence that the PMCA has its own glycolytic ATP supply that can fuel the PMCA in the face of impaired mitochondrial function. Moreover, membrane phospholipids, mitochondrial membrane potential, caspase/calpain cleavage and oxidative stress have all been implicated in metabolic stress-induced inhibition of the PMCA. The major focus of this review is to challenge the conventional view of ATP-dependent regulation of the PMCA and bring together some of the alternative or additional mechanisms by which metabolic stress impairs PMCA activity resulting in cytosolic Ca2+ overload and cytotoxicity.
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Affiliation(s)
- Jason Ie Bruce
- Jason IE Bruce, Faculty of Life Sciences, The University of Manchester, Manchester M13 9NT, United Kingdom
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Sun L, Zhao Y, Li X, Yuan H, Cheng A, Lou H. A lysosomal-mitochondrial death pathway is induced by solamargine in human K562 leukemia cells. Toxicol In Vitro 2010; 24:1504-11. [PMID: 20647040 DOI: 10.1016/j.tiv.2010.07.013] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Revised: 07/05/2010] [Accepted: 07/14/2010] [Indexed: 11/16/2022]
Abstract
Solamargine (SM), a steroidal alkaloid glycoside from Solanum nigrum L., displayed a superior cytotoxicity to many human tumor cells. Further investigation with human K562 leukemia cells found that SM could induce an early lysosomal rupture within 2h as assessed by acridine-orange relocation and alkalinization of lysosomes. Intracellular lysosomal rupture is also confirmed with the release of cathepsin B to cytosol detected by western blot. Subsequent mitochondrial damage including mitochondrial membrane permeabilization detected by decrease membrane potential as well as the release of cytochrome c from mitochondria was also observed. The cellular Ca(2+) overload is more pronounced in SM-treated cells. Cells exposed to 10 microM SM for 30 min showed a maximum 7-fold increase in intracellular calcium concentration compared with vehicle-treated controls. The down-expression of Bcl-2, up-regulation of Bax, caspase-3 and caspase-9 activities followed by above changes revealed that the cytotoxicity of SM was involved in a lysosomal-mitochondrial death pathway induced by SM.
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Affiliation(s)
- Lingmei Sun
- School of Pharmaceutical Sciences, Shandong University, Jinan, China
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40
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Van Herreweghe F, Festjens N, Declercq W, Vandenabeele P. Tumor necrosis factor-mediated cell death: to break or to burst, that's the question. Cell Mol Life Sci 2010; 67:1567-79. [PMID: 20198502 PMCID: PMC11115929 DOI: 10.1007/s00018-010-0283-0] [Citation(s) in RCA: 159] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Accepted: 01/20/2010] [Indexed: 02/06/2023]
Abstract
In this review, we discuss the signal-transduction pathways of three major cellular responses induced by tumor necrosis factor (TNF): cell survival through NF-kappaB activation, apoptosis, and necrosis. Recruitment and activation of caspases plays a crucial role in the initiation and execution of TNF-induced apoptosis. However, experimental inhibition of caspases reveals an alternative cell death pathway, namely necrosis, also called necroptosis, suggesting that caspases actively suppress the latter outcome. TNF-induced necrotic cell death crucially depends on the kinase activity of receptor interacting protein serine-threonine kinase 1 (RIP1) and RIP3. It was recently demonstrated that ubiquitination of RIP1 determines whether it will function as a pro-survival or pro-cell death molecule. Deeper insight into the mechanisms that control the molecular switches between cell survival and cell death will help us to understand why TNF can exert so many different biological functions in the etiology and pathogenesis of human diseases.
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Affiliation(s)
- Franky Van Herreweghe
- Unit For Molecular Signalling and Cell Death, Department for Molecular Biomedical Research, VIB, Technologiepark 927, 9052 Ghent (Zwijnaarde), Belgium
- Unit for Molecular Signalling and Cell Death, Department of Biomedical Molecular Biology, Ghent University, Technologiepark 927, 9052 Ghent, Belgium
| | - Nele Festjens
- Unit for Molecular Glycobiology, Department for Molecular Biomedical Research, VIB, Ghent University, Technologiepark 927, 9052 Ghent, Belgium
- Laboratory for Protein Biochemistry and Biomolecular Engineering, Department of Biochemistry and Microbiology, Ghent University, Ledeganckstraat 35, 9052 Ghent, Belgium
| | - Wim Declercq
- Unit For Molecular Signalling and Cell Death, Department for Molecular Biomedical Research, VIB, Technologiepark 927, 9052 Ghent (Zwijnaarde), Belgium
- Unit for Molecular Signalling and Cell Death, Department of Biomedical Molecular Biology, Ghent University, Technologiepark 927, 9052 Ghent, Belgium
| | - Peter Vandenabeele
- Unit For Molecular Signalling and Cell Death, Department for Molecular Biomedical Research, VIB, Technologiepark 927, 9052 Ghent (Zwijnaarde), Belgium
- Unit for Molecular Signalling and Cell Death, Department of Biomedical Molecular Biology, Ghent University, Technologiepark 927, 9052 Ghent, Belgium
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Chen CL, Kuo LR, Chang CL, Hwu YK, Huang CK, Lee SY, Chen K, Lin SJ, Huang JD, Chen YY. In situ real-time investigation of cancer cell photothermolysis mediated by excited gold nanorod surface plasmons. Biomaterials 2010; 31:4104-12. [DOI: 10.1016/j.biomaterials.2010.01.140] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2009] [Accepted: 01/28/2010] [Indexed: 11/29/2022]
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Vandenabeele P, Declercq W, Van Herreweghe F, Vanden Berghe T. The role of the kinases RIP1 and RIP3 in TNF-induced necrosis. Sci Signal 2010; 3:re4. [PMID: 20354226 DOI: 10.1126/scisignal.3115re4] [Citation(s) in RCA: 442] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Tumor necrosis factor (TNF) is a pleiotropic molecule with a crucial role in cellular stress and inflammation during infection, tissue damage, and cancer. TNF signaling can lead to three distinct outcomes, each of which is initiated by different signaling complexes: the gene induction or survival mode, the apoptosis mode, and the necrosis mode. The kinases receptor-interacting protein 1 (RIP1) and RIP3 are key signaling molecules in necrosis and are regulated by caspases and ubiquitination. Moreover, TNF stimulation induces the formation of a necrosome in which RIP3 is activated and interacts with enzymes that control glycolytic flux and glutaminolysis. The necrosome induces mitochondrial complex I-mediated production of reactive oxygen species (ROS) and cytotoxicity, which suggest a functional link between increased bioenergetics and necrosis. In addition, other effector mechanisms also contribute to TNF-induced necrosis, such as recruitment of NADPH (the reduced form of nicotinamide adenine dinucleotide phosphate) oxidases and subsequent ROS production at the membrane-associated TNF receptor complex I; calcium mobilization; activation of phospholipase A(2), lipoxygenases, and acid sphingomyelinases; and lysosomal destabilization. However, the link between RIP1 and RIP3 and these subcellular events remains to be established. The regulation of RIP1 and RIP3 and their downstream signaling cascades opens new therapeutic avenues for treatment of pathologies associated with cell loss, such as ischemia-reperfusion damage and neurodegeneration, and ways to stimulate alternative immunogenic cell death pathways in cancer.
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Affiliation(s)
- Peter Vandenabeele
- Molecular Signaling and Cell Death Unit, Department for Molecular Biomedical Research, VIB, 9052 Zwijnaarde, Belgium.
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Aung CS, Ye W, Plowman G, Peters AA, Monteith GR, Roberts-Thomson SJ. Plasma membrane calcium ATPase 4 and the remodeling of calcium homeostasis in human colon cancer cells. Carcinogenesis 2009; 30:1962-9. [DOI: 10.1093/carcin/bgp223] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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Gozar MM, Goodchild A, Passioura T, King A, Lai A, Witherington C, Rivory L. Dz13, a DNAzyme targeting c-jun, induces off-target cytotoxicity in endothelial cells with features of nonapoptotic programmed cell death. Oligonucleotides 2009; 18:257-68. [PMID: 18699742 DOI: 10.1089/oli.2008.0139] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
We have previously shown that Dz13, a catalytic DNA molecule (DNAzyme) designed against c-jun, is cytotoxic to nonquiescent cells by a mechanism independent of c-jun mRNA cleavage. In this report, we evaluated programmed cell death (PCD) pathways in order to gain further insight into the mechanism of action of Dz13. Using human dermal microvascular endothelial cells (HMEC-1), we found that Dz13-mediated cell death is characterized by mitochondrial depolarization, caspase-8 activation, lysosomal increase, and autophagosome formation. Classical DNA laddering and translocation of mitochondrial proteins were not observed. An array of inhibitors, including those targeting caspases, failed to abrogate cytotoxicity and mitochondrial depolarization. Cytotoxicity did not proceed from endoplasmic reticulum (ER) stress. The possible involvement of PARP-1 in Dz13-mediated cytotoxicity was indicated by its differential release as gauged by protein extraction data and its apparent binding to Dz13, as evidenced by protein pull-down experiments. This study on Dz13-mediated cytotoxicity presents a detailed investigation into the interplay of cell death effectors involved in apoptosis, autophagy, and necrosis, and demonstrates a novel form of oligonucleotide-mediated cytotoxicity with features of PCD.
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Affiliation(s)
- Mary Margaret Gozar
- Johnson and Johnson Research Pty Limited, Eveleigh, New South Wales, 1430, Australia.
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45
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Zheng Y, Zhao YL, Deng X, Yang S, Mao Y, Li Z, Jiang P, Zhao X, Wei Y. Chloroquine inhibits colon cancer cell growth in vitro and tumor growth in vivo via induction of apoptosis. Cancer Invest 2009; 27:286-92. [PMID: 19194831 DOI: 10.1080/07357900802427927] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The present study was to investigate the anticancer effect of chloroquine on proliferation of mouse colon cancer cell line CT26 in vivo and in vitro and the possible mechanism. We found that chloroquine inhibited CT26 proliferation by concentration- and time-dependent manner. This effect was associated with apoptosis induction and decreased level of phosphorylated p42/44 mitogen-activated protein kinase and phosphorylated Akt. The in vivo study showed chloroquine-reduced tumor volume and prolonged survival time in CT26-bearing mice. These observations indicated chloroquine could inhibit CT26 proliferation by inducing apoptosis both in vitro and in vivo, providing its chemotherapeutic potential of human cancers.
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Affiliation(s)
- Yuzhu Zheng
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
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46
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The efficacy and selectivity of tumor cell killing by Akt inhibitors are substantially increased by chloroquine. Bioorg Med Chem 2008; 16:7888-93. [PMID: 18691894 DOI: 10.1016/j.bmc.2008.07.076] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2008] [Revised: 07/23/2008] [Accepted: 07/25/2008] [Indexed: 11/22/2022]
Abstract
This study was to evaluate the enhancement value of chloroquine (CQ) in cancer cell killing when used in combination with Akt inhibitors. The results showed that the combination of CQ and Akt inhibitors is much more effective than either one alone. Importantly, the CQ-mediated chemosensitization of cell killing effects by Akt inhibitors is cancer specific. In particular, when combined with 10 microM CQ, 1,3-dihydro-1-(1-((4-(6-phenyl-1H-imidazo[4,5-g]quinoxalin-7-yl)phenyl)methyl)-4-piperidinyl)-2H-benzimidazol-2-one (an Akt1 and 2 inhibitor; compound 8) killed cancer cells 10-120 times more effectively than normal cells. Thus, CQ is a very effective and cancer-specific chemosensitizer when used in combination with Akt inhibitors.
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Horie T, Ono K, Nagao K, Nishi H, Kinoshita M, Kawamura T, Wada H, Shimatsu A, Kita T, Hasegawa K. Oxidative stress induces GLUT4 translocation by activation of PI3-K/Akt and dual AMPK kinase in cardiac myocytes. J Cell Physiol 2008; 215:733-42. [PMID: 18163380 DOI: 10.1002/jcp.21353] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
In response to metabolic stress, GLUT4, the most abundant glucose transporter, translocates from intracellular vesicles to the plasma membrane. This appears to play an important role in protecting cardiac myocytes from ischemic injury. To investigate the precise mechanisms of GLUT4 translocation in cardiomyocytes, we have established a method for quantifying the relative proportion of sarcolemmal GLUT4 to total GLUT4 in these cells. Stimulation with H2O2 resulted in a concentration-dependent increase in GLUT4 translocation, which peaked at 15 min after stimulation. The dominant-negative form (DN) of AMP-activated protein kinase (AMPK) alpha2 inhibited the H2O2-induced translocation of GLUT4. We further examined the role of two known AMPK kinases (AMPKKs), calmodulin-dependent protein kinase kinase (CaMKK)beta and LKB1. The DN of CaMKKbeta or LKB1 alone inhibited H2O2-induced GLUT4 translocation only partially compared to the inhibition produced by the DN of AMPKalpha2. However, the combination of DN-LKB1 and DN-CaMKKbeta inhibited translocation to an extent similar to with DN-AMPKalpha2. Stimulation with H2O2 also activated Akt and the inhibition of PI3-K/Akt prevented GLUT4 translocation to the same extent as with AMPK inhibition. When the DN of AMPKalpha2 was applied with DN-PI3-K, there was a complete reduction in the GLUT4 membrane level similar to that seen at the 0 time-point. These results demonstrate that AMPK and PI3-K/Akt have an additive effect on oxidative stress-mediated GLUT4 translocation.
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Affiliation(s)
- Takahiro Horie
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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48
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Horie T, Ono K, Kinoshita M, Nishi H, Nagao K, Kawamura T, Abe Y, Wada H, Shimatsu A, Kita T, Hasegawa K. TG-interacting factor is required for the differentiation of preadipocytes. J Lipid Res 2008; 49:1224-34. [PMID: 18310014 DOI: 10.1194/jlr.m700578-jlr200] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The accumulation of visceral adipose tissue is closely associated with insulin resistance and metabolic syndrome. Therefore, it is important to identify genes that are required for adipocyte differentiation. To identify genes that are required for the differentiation of 3T3-L1 preadipocytes into mature adipocytes, we used retrovirus insertion-mediated random mutagenesis to generate 3T3-L1 cell lines that lose their ability to differentiate into mature adipocytes. One of the genes identified was TG-interacting factor (TGIF), a DNA binding homeodomain protein that has been demonstrated to suppress Smad-mediated activation of transforming growth factor beta (TGF-beta)-regulated transcription. In the TGIF-disrupted clone of 3T3-L1 preadipocytes, the rate of differentiation into mature adipocytes was clearly reduced compared with that in the wild-type clone. Suppression of TGIF by lentivirus-mediated RNAi also inhibited the differentiation of 3T3-L1 cells. Insulin specifically increased the abundance of TGIF protein, primarily by enhancing its stability. In addition, insulin caused the rapid accumulation of TGIF in the nuclei. Forced expression of exogenous TGIF repressed both endogenous and overexpressed Smad2/3-mediated promoter activity in 3T3-L1. These findings suggest that insulin specifically antagonizes TGF-beta signaling in preadipocytes by stabilizing the putative Smad transcriptional corepressor TGIF and regulates adipocyte differentiation.
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Affiliation(s)
- Takahiro Horie
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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49
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Yang Z, Cheng W, Hong L, Chen W, Wang Y, Lin S, Han J, Zhou H, Gu J. Adenine nucleotide (ADP/ATP) translocase 3 participates in the tumor necrosis factor induced apoptosis of MCF-7 cells. Mol Biol Cell 2007; 18:4681-9. [PMID: 17855512 PMCID: PMC2043556 DOI: 10.1091/mbc.e06-12-1161] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Mitochondrial adenine nucleotide translocase (ANT) is believed to be a component or a regulatory component of the mitochondrial permeability transition pore (mtPTP), which controls mitochondrial permeability transition during apoptosis. However, the role of ANT in apoptosis is still uncertain, because hepatocytes isolated from ANT knockout and wild-type mice are equally sensitive to TNF- and Fas-induced apoptosis. In a screen for genes required for tumor necrosis factor alpha (TNF-alpha)-induced apoptosis in MCF-7 human breast cancer cells using retrovirus insertion-mediated random mutagenesis, we discovered that the ANT3 gene is involved in TNF-alpha-induced cell death in MCF-7 cells. We further found that ANT3 is selectively required for TNF- and oxidative stress-induced cell death in MCF-7 cells, but it is dispensable for cell death induced by several other inducers. This data supplements previous data obtained from ANT knockout studies, indicating that ANT is involved in some apoptotic processes. We found that the resistance to TNF-alpha-induced apoptosis observed in ANT3 mutant (ANT3(mut)) cells is associated with a deficiency in the regulation of the mitochondrial membrane potential and cytochrome c release. It is not related to intracellular ATP levels or survival pathways, supporting a previous model in which ANT regulates mtPTP. Our study provides genetic evidence supporting a role of ANT in apoptosis and suggests that the involvement of ANT in cell death is cell type- and stimulus-dependent.
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Affiliation(s)
- Ziqiang Yang
- *National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing 100871, China
| | - Wei Cheng
- The Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China; and
| | - Lixin Hong
- The Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China; and
| | - Wanze Chen
- The Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China; and
| | - Yanhai Wang
- The Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China; and
| | - Shengcai Lin
- The Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China; and
| | - Jiahuai Han
- The Key Laboratory of the Ministry of Education for Cell Biology and Tumor Cell Engineering, School of Life Sciences, Xiamen University, Xiamen, Fujian 361005, China; and
| | - Huamin Zhou
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037
| | - Jun Gu
- *National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing 100871, China
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50
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Otsuka M, Jing Q, Georgel P, New L, Chen J, Mols J, Kang YJ, Jiang Z, Du X, Cook R, Das SC, Pattnaik AK, Beutler B, Han J. Hypersusceptibility to vesicular stomatitis virus infection in Dicer1-deficient mice is due to impaired miR24 and miR93 expression. Immunity 2007; 27:123-34. [PMID: 17613256 DOI: 10.1016/j.immuni.2007.05.014] [Citation(s) in RCA: 274] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2007] [Revised: 04/10/2007] [Accepted: 05/07/2007] [Indexed: 01/24/2023]
Abstract
Dicer is essential for plant, Caenorhabditis elegans, and Drosophila antiviral responses because of its role in generating small interfering RNA (siRNA) from viral genomes. We show that because of impaired miRNA production, mice with a variant Dicer1 allele (Dicer1(d/d)) were more susceptible to vesicular stomatitis virus (VSV) infection. We did not detect VSV genome-derived siRNA in wild-type cells or any alteration of interferon-mediated antiviral responses by Dicer1 deficiency. Rather, we found that host miR24 and miR93 could target viral large protein (L protein) and phosphoprotein (P protein) genes, and a lack of miR24 and miR93 was responsible for increased VSV replication in Dicer1(d/d) cells. Our data suggest that host miRNA can play a role in host interactions with viruses.
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Affiliation(s)
- Motoyuki Otsuka
- Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA
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