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Panagiotou S, Tan KW, Nguyen PM, Müller A, Oqua AI, Tomas A, Wendt A, Eliasson L, Tengholm A, Solimena M, Idevall-Hagren O. OSBP-mediated PI(4)P-cholesterol exchange at endoplasmic reticulum-secretory granule contact sites controls insulin secretion. Cell Rep 2024; 43:113992. [PMID: 38536815 DOI: 10.1016/j.celrep.2024.113992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 02/07/2024] [Accepted: 03/07/2024] [Indexed: 04/28/2024] Open
Abstract
Insulin is packaged into secretory granules that depart the Golgi and undergo a maturation process that involves changes in the protein and lipid composition of the granules. Here, we show that insulin secretory granules form physical contacts with the endoplasmic reticulum and that the lipid exchange protein oxysterol-binding protein (OSBP) is recruited to these sites in a Ca2+-dependent manner. OSBP binding to insulin granules is positively regulated by phosphatidylinositol-4 (PI4)-kinases and negatively regulated by the PI4 phosphate (PI(4)P) phosphatase Sac2. Loss of Sac2 results in excess accumulation of cholesterol on insulin granules that is normalized when OSBP expression is reduced, and both acute inhibition and small interfering RNA (siRNA)-mediated knockdown of OSBP suppress glucose-stimulated insulin secretion without affecting insulin production or intracellular Ca2+ signaling. In conclusion, we show that lipid exchange at endoplasmic reticulum (ER)-granule contact sites is involved in the exocytic process and propose that these contacts act as reaction centers with multimodal functions during insulin granule maturation.
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Affiliation(s)
| | - Kia Wee Tan
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Phuoc My Nguyen
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Andreas Müller
- Molecular Diabetology, University Hospital and Faculty of Medicine Carl Gustav Carus, TU Dresden, Dresden, Germany; Paul Langerhans Institute Dresden (PLID) of the Helmholtz Center Munich at the University Hospital Carl Gustav Carus and Faculty of Medicine of the TU Dresden, Dresden, Germany; German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
| | - Affiong Ika Oqua
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Alejandra Tomas
- Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
| | - Anna Wendt
- Department of Clinical Sciences, Lund University, Lund, Sweden; Lund University Diabetes Center (LUDC), Lund, Sweden
| | - Lena Eliasson
- Department of Clinical Sciences, Lund University, Lund, Sweden; Lund University Diabetes Center (LUDC), Lund, Sweden
| | - Anders Tengholm
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - Michele Solimena
- Paul Langerhans Institute Dresden (PLID) of the Helmholtz Center Munich at the University Hospital Carl Gustav Carus and Faculty of Medicine of the TU Dresden, Dresden, Germany; German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany; Section of Cell Biology and Functional Genomics, Division of Diabetes, Endocrinology and Metabolism, Department of Metabolism, Digestion and Reproduction, Imperial College London, London, UK
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OSW-1 induces apoptosis and cyto-protective autophagy, and synergizes with chemotherapy on triple negative breast cancer metastasis. Cell Oncol (Dordr) 2022; 45:1255-1275. [PMID: 36155886 DOI: 10.1007/s13402-022-00716-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/05/2022] [Indexed: 12/15/2022] Open
Abstract
PURPOSE Triple-negative breast cancer (TNBC) is the most malignant subtype of breast cancer. As yet, chemotherapy with drugs such as doxorubicin is the main treatment strategy. However, drug resistance and dose-dependent toxicities restrict their clinical use. Natural products are major sources of anti-tumor drugs. OSW-1 is a natural compound with strong anti-cancer effects in several types of cancer, but its effects on the efficacy of chemotherapy in TNBC and its underlying mechanism remain unclear. METHODS The inhibitory activities of OSW-1 and its combination with several chemotherapy drugs were tested using in vitro assays and in vivo subcutaneous and metastatic mouse TNBC models. The effects of the mono- and combination treatments on TNBC cell viability, apoptosis, autophagy and related signaling pathways were assessed using MTT, flow cytometry, RNA sequencing and immunology-based assays. In addition, the in vivo inhibitory effects of OSW-1 and (combined) chemotherapies were evaluated in subcutaneous and metastatic mouse tumor models. RESULTS We found that OSW-1 induces Ca2+-dependent mitochondria-dependent intrinsic apoptosis and cyto-protective autophagy through the PI3K-Akt-mTOR pathway in TNBC cells in vitro. We also found that OSW-1 and doxorubicin exhibited strong synergistic anti-TNBC capabilities both in vivo and in vitro. Combination treatment strongly inhibited spontaneous and experimental lung metastases in 4T1 mouse models. In addition, the combination strategy of OSW-1 + Carboplatin + Docetaxel showed an excellent anti-metastatic effect in vivo. CONCLUSIONS Our data revealed the mode of action and molecular mechanism underlying the effect of OSW-1 against TNBC, and provided a useful guidance for improving the sensitivity of TNBC cells to conventional chemotherapeutic drugs, which warrants further investigation.
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Rodrigues T, Piccirillo S, Magi S, Preziuso A, Dos Santos Ramos V, Serfilippi T, Orciani M, Maciel Palacio Alvarez M, Luis Dos Santos Tersariol I, Amoroso S, Lariccia V. Control of Ca 2+ and metabolic homeostasis by the Na +/Ca 2+ exchangers (NCXs) in health and disease. Biochem Pharmacol 2022; 203:115163. [PMID: 35803319 DOI: 10.1016/j.bcp.2022.115163] [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: 04/01/2022] [Revised: 06/30/2022] [Accepted: 07/01/2022] [Indexed: 11/16/2022]
Abstract
Spatial and temporal control of calcium (Ca2+) levels is essential for the background rhythms and responses of living cells to environmental stimuli. Whatever other regulators a given cellular activity may have, localized and wider scale Ca2+ events (sparks, transients, and waves) are hierarchical determinants of fundamental processes such as cell contraction, excitability, growth, metabolism and survival. Different cell types express specific channels, pumps and exchangers to efficiently generate and adapt Ca2+ patterns to cell requirements. The Na+/Ca2+ exchangers (NCXs) in particular contribute to Ca2+ homeostasis by buffering intracellular Ca2+ loads according to the electrochemical gradients of substrate ions - i.e., Ca2+ and sodium (Na+) - and under a dynamic control of redundant regulatory processes. An interesting feature of NCX emerges from the strict relationship that connects transporter activity with cell metabolism: on the one hand NCX operates under constant control of ATP-dependent regulatory processes, on the other hand the ion fluxes generated through NCX provide mechanistic support for the Na+-driven uptake of glutamate and Ca2+ influx to fuel mitochondrial respiration. Proof of concept evidence highlights therapeutic potential of preserving a timed and balanced NCX activity in a growing rate of diseases (including excitability, neurodegenerative, and proliferative disorders) because of an improved ability of stressed cells to safely maintain ion gradients and mitochondrial bioenergetics. Here, we will summarize and review recent works that have focused on the pathophysiological roles of NCXs in balancing the two-way relationship between Ca2+ signals and metabolism.
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Affiliation(s)
- Tiago Rodrigues
- Center for Natural and Human Sciences (CCNH), Federal University of ABC (UFABC), Santo André, SP, Brazil.
| | - Silvia Piccirillo
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Simona Magi
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Alessandra Preziuso
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Vyctória Dos Santos Ramos
- Interdisciplinary Center for Biochemistry Investigation (CIIB), University of Mogi das Cruzes (UMC), Mogi das Cruzes, SP, Brazil
| | - Tiziano Serfilippi
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Monia Orciani
- Department of Clinical and Molecular Sciences, Histology, University "Politecnica delle Marche", Ancona, Italy.
| | - Marcela Maciel Palacio Alvarez
- Department of Biochemistry, São Paulo School of Medicine, Federal University of São Paulo (Unifesp) São Paulo, SP, Brazil
| | | | - Salvatore Amoroso
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
| | - Vincenzo Lariccia
- Department of Biomedical Sciences and Public Health, School of Medicine, University "Politecnica delle Marche", Ancona, Italy.
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Arora A, Taskinen JH, Olkkonen VM. Coordination of inter-organelle communication and lipid fluxes by OSBP-related proteins. Prog Lipid Res 2022; 86:101146. [PMID: 34999137 DOI: 10.1016/j.plipres.2022.101146] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/10/2021] [Accepted: 01/03/2022] [Indexed: 12/31/2022]
Abstract
Oxysterol-binding protein (OSBP) and OSBP-related proteins (ORPs) constitute one of the largest families of lipid-binding/transfer proteins (LTPs) in eukaryotes. The current view is that many of them mediate inter-organelle lipid transfer over membrane contact sites (MCS). The transfer occurs in several cases in a 'counter-current' fashion: A lipid such as cholesterol or phosphatidylserine (PS) is transferred against its concentration gradient driven by transport of a phosphoinositide in the opposite direction. In this way ORPs are envisioned to maintain the distinct organelle lipid compositions, with impacts on multiple organelle functions. However, the functions of ORPs extend beyond lipid homeostasis to regulation of processes such as cell survival, proliferation and migration. Important expanding areas of mammalian ORP research include their roles in viral and bacterial infections, cancers, and neuronal function. The yeast OSBP homologue (Osh) proteins execute multifaceted functions in sterol and glycerophospholipid homeostasis, post-Golgi vesicle transport, phosphatidylinositol-4-phosphate, sphingolipid and target of rapamycin (TOR) signalling, and cell cycle control. These observations identify ORPs as lipid transporters and coordinators of signals with an unforeseen variety of cellular processes. Understanding their activities not only enlightens the biology of the living cell but also allows their employment as targets of new therapeutic approaches for disease.
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Affiliation(s)
- Amita Arora
- Minerva Foundation Institute for Medical Research, and Department of Anatomy, Faculty of Medicine, University of Helsinki, Finland
| | - Juuso H Taskinen
- Minerva Foundation Institute for Medical Research, and Department of Anatomy, Faculty of Medicine, University of Helsinki, Finland
| | - Vesa M Olkkonen
- Minerva Foundation Institute for Medical Research, and Department of Anatomy, Faculty of Medicine, University of Helsinki, Finland.
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Sharafi-Badr P, Karoobi S, Monsef-Esfahani HR, Ghahremani MH, Adhami HR. In vitro Cytotoxic Screening of Different Parts from Ornithogalum bungei on Selected Cancer Cells. IRANIAN JOURNAL OF MEDICAL SCIENCES 2022; 47:63-72. [PMID: 35017779 PMCID: PMC8743371 DOI: 10.30476/ijms.2021.89521.2037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 03/01/2021] [Accepted: 03/11/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Natural products comprise a large section of pharmaceutical agents in the field of cancer therapy. In the present study, the organic extracts and fractions of various parts of Ornithogalum bungei were investigated for in vitro cytotoxic properties on three human cancer cell lines, hepatocellular carcinoma (HepG2), prostate cancer (PC3), and leukemia (K562) cells. METHODS The present experimental study was conducted at Tehran University of Medical Sciences (Tehran, Iran) during 2017-2019. Separately extracted plant materials, including bulbs, stems, and flowers of O. bungei were assessed by the tetrazolium dye-based colorimetric assay (MTT). The selected extracts were submitted to fractionation using vacuum liquid chromatography and after MTT assay, the half maximal inhibitory concentration (IC50 (value for each fraction was determined. The data were analyzed using One-way ANOVA followed by Tukey's post hoc test. P<0.05 was considered statistically significant. RESULTS The cytotoxicity of the bulb's methanol extract and the dichloromethane extract of aerial parts increased in a concentration-dependent manner. Additionally, cell viability decreased in a dose-dependent manner. In the HepG2 cell line, the best IC50 values of fractions from DCM extracts of aerial parts were determined to be 19.8±10.2 µg/mL after 24 hours of exposure and 19.39±6.4 µg/mL following 48 hours of exposure. In the PC3 cell line, after 48 hours of exposure, the IC50 values of fractions were unaccountable, while the percentage of inhibition for A6 to A11 in 24 hours of exposure was more than 40 µg/mL. CONCLUSION O. bungei growing in Iran showed significant potentials as a cytotoxic agent with selective effects on different cancer cell lines.
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Affiliation(s)
- Paria Sharafi-Badr
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Sepideh Karoobi
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Mohammad Hossein Ghahremani
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran,
Toxicology and Poisoning Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid-Reza Adhami
- Department of Pharmacognosy, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
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Li Y, Yu X, Deng L, Zhou S, Wang Y, Zheng X, Chu Q. Neochlorogenic acid anchors MCU-based calcium overload for cancer therapy. Food Funct 2021; 12:11387-11398. [PMID: 34672304 DOI: 10.1039/d1fo01393a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Cancer is a major threat to human health worldwide, yet the clinical therapies remain unsatisfactory. In this study, we found that a Tetrastigma hemsleyanum leaves flavone (TLF) intervention could achieve tumor inhibition. Besides, neochlorogenic acid (NA), which had the highest absorbance peak in the HPLC profile of TLF, showed superior anti-proliferation ability over TLF, and could effectively trigger apoptosis, restrain migration, and facilitate cytoskeleton collapse, suggesting its key role in TLF's anticancer property. Molecular docking analysis suggested that NA was capable of binding with mitochondrial Ca2+ uniporter (MCU), and further experiments confirmed that NA upregulated the MCU level to permit excess calcium ion influx, leading to mitochondrial calcium imbalance, dysfunction, structure alteration, and ROS elevation. Moreover, tumor-bearing mice were applied to further confirm the excellent tumor inhibition ability of NA under Ca2+-abundant conditions. Therefore, this study uncovered that NA could effectively trigger robust MCU-mediated calcium overload cancer therapy, which could be utilized in novel strategies for future cancer treatment.
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Affiliation(s)
- Yonglu Li
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China. .,Zhejiang Key Laboratory for Agro-food Processing, Zhejiang University, Hangzhou 310058, People's Republic of China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, People's Republic of China.,National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Xin Yu
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China. .,Zhejiang Key Laboratory for Agro-food Processing, Zhejiang University, Hangzhou 310058, People's Republic of China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, People's Republic of China.,National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Lingchi Deng
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China. .,Zhejiang Key Laboratory for Agro-food Processing, Zhejiang University, Hangzhou 310058, People's Republic of China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, People's Republic of China.,National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Su Zhou
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China. .,Zhejiang Key Laboratory for Agro-food Processing, Zhejiang University, Hangzhou 310058, People's Republic of China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, People's Republic of China.,National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Yaxuan Wang
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China. .,Zhejiang Key Laboratory for Agro-food Processing, Zhejiang University, Hangzhou 310058, People's Republic of China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, People's Republic of China.,National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Xiaodong Zheng
- Department of Food Science and Nutrition, Zhejiang University, Hangzhou 310058, People's Republic of China. .,Zhejiang Key Laboratory for Agro-food Processing, Zhejiang University, Hangzhou 310058, People's Republic of China.,Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, People's Republic of China.,National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Qiang Chu
- Tea Research Institute, Zhejiang University, Hangzhou 310058, People's Republic of China.
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Zhan Z, Liu Z, Lai J, Zhang C, Chen Y, Huang H. Anticancer Effects and Mechanisms of OSW-1 Isolated From Ornithogalum saundersiae: A Review. Front Oncol 2021; 11:747718. [PMID: 34631585 PMCID: PMC8496766 DOI: 10.3389/fonc.2021.747718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 09/06/2021] [Indexed: 01/07/2023] Open
Abstract
For centuries, cancer has been a lingering dark cloud floating on people's heads. With rapid population growth and aging worldwide, cancer incidence and mortality are growing rapidly. Despite major advances in oncotherapy including surgery, radiation and chemical therapy, as well as immunotherapy and targeted therapy, cancer is expected be the leading cause of premature death in this century. Nowadays, natural compounds with potential anticancer effects have become an indispensable natural treasure for discovering clinically useful agents and made remarkable achievements in cancer chemotherapy. In this regards, OSW-1, which was isolated from the bulbs of Ornithogalum saundersiae in 1992, has exhibited powerful anticancer activities in various cancers. However, after almost three decades, OSW-1 is still far from becoming a real anticancer agent for its anticancer mechanisms remain unclear. Therefore, in this review we summarize the available evidence on the anticancer effects and mechanisms of OSW-1 in vitro and in vivo, and some insights for researchers who are interested in OSW-1 as a potential anticancer drug. We conclude that OSW-1 is a potential candidate for anticancer drugs and deserves further study.
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Affiliation(s)
| | | | | | | | - Yong Chen
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Haiyan Huang
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
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8
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The emerging roles of OSBP-related proteins in cancer: Impacts through phosphoinositide metabolism and protein-protein interactions. Biochem Pharmacol 2021; 196:114455. [PMID: 33556339 DOI: 10.1016/j.bcp.2021.114455] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 01/26/2021] [Accepted: 01/28/2021] [Indexed: 01/04/2023]
Abstract
Oxysterol-binding protein -related proteins (ORPs) form a large family of intracellular lipid binding/transfer proteins. A number of ORPs are implicated in inter-organelle lipid transfer over membrane contacts sites, their mode of action involving in several cases the transfer of two lipids in opposite directions, termed countercurrent lipid transfer. A unifying feature appears to be the capacity to bind phosphatidylinositol polyphosphates (PIPs). These lipids are in some cases transported by ORPs from one organelle to another to drive the transfer of another lipid against its concentration gradient, while they in other cases may act as allosteric regulators of ORPs, or an ORP may introduce a PIP to an enzyme for catalysis. Dysregulation of several ORP family members is implicated in cancers, ORP3, -4, -5 and -8 being thus far the most studied examples. The most likely mechanisms underlying their associations with malignant growth are (i) impacts on PIP-mediated signaling events resulting in altered Ca2+ homeostasis, bioenergetics, cell survival, proliferation, and migration, (ii) protein-protein interactions affecting the activity of signaling factors, and (iii) modification of cellular lipid transport in a way that facilitates the proliferation of malignant cells. In this review I discuss the existing functional evidence for the involvement of ORPs in cancerous growth, discuss the findings in the light of the putative mechanisms outlined above and the possibility of employing ORPs as targets of anti-cancer therapy.
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9
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Bensen RC, Gunay G, Finneran MC, Jhingan I, Acar H, Burgett AWG. Small Molecule Targeting of Oxysterol-Binding Protein (OSBP)-Related Protein 4 and OSBP Inhibits Ovarian Cancer Cell Proliferation in Monolayer and Spheroid Cell Models. ACS Pharmacol Transl Sci 2021; 4:744-756. [PMID: 33860198 DOI: 10.1021/acsptsci.0c00207] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Indexed: 12/17/2022]
Abstract
The development of precision drugs for the selective treatment of ovarian cancer will require targeting proliferative factors selectively expressed in ovarian tumors or targeting unique physiological microenvironments specific for ovarian tumors. Here, we report that oxysterol-binding protein (OSBP)-related protein 4 (ORP4) is a potential druggable precision target in ovarian cancer cells. ORP4 has limited expression in normal tissues and was recently recognized to be a cancer-specific driver of cellular proliferation, including in patient-isolated leukemias. We demonstrate that ORP4 is strongly expressed in a panel of ovarian cancer cell lines. The antiproliferative natural product compound OSW-1 targets ORP4 and OSBP. Our results demonstrate that the OSW-1 compound has high antiproliferative potency in both monolayer and three-dimensional ovarian cancer spheroid models, especially compared to the standard-of-care agents cisplatin and paclitaxel. OSW-1 compound treatment induces a loss of ORP4 expression after 48 h, which is coincident with the cytotoxic effects of OSW-1. The absence of extracellular lipids markedly potentiated the cytotoxicity of OSW-1, which was reversed by addition of extracellular free cholesterol. OSBP, but not ORP4, is reported to transport cholesterol and other lipids between organelles. Our results indicate that the targeting of ORP4 is responsible for the antiproliferative activity of the OSW-1 compound, but that in the absence of exogenously supplied cholesterol, which might be similar to the in vivo ovarian cancer microenvironment, possible OSW-1 targeting of OSBP further potentiates the anticancer activity of the compound. Overall, ORP4 and potentially OSBP are revealed as potential druggable targets for the development of novel treatments for ovarian cancer.
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Affiliation(s)
- Ryan C Bensen
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Gokhan Gunay
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Matthew C Finneran
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Isha Jhingan
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Handan Acar
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States.,Stephenson Cancer Center, University of Oklahoma, Oklahoma City, Oklahoma 73104, United States
| | - Anthony W G Burgett
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, Oklahoma 73019, United States.,Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma 73117, United States.,Stephenson Cancer Center, University of Oklahoma, Oklahoma City, Oklahoma 73104, United States
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10
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Sun L, Zhu D, Beverborg LOG, Wang R, Dang Y, Ma M, Li W, Yu B. Synthesis and Antiproliferative Activities of
OSW
‐1 Analogues Bearing 2”‐
O
‐
p
‐Acylaminobenzoyl
Residues
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000110] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lijun Sun
- Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
- State Key Laboratory of Bio‐organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Di Zhu
- Key Laboratory of Metabolism and Molecular Medicine, the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University Shanghai 200032 China
| | - Laura Olde Groote Beverborg
- Key Laboratory of Metabolism and Molecular Medicine, the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University Shanghai 200032 China
| | - Ruina Wang
- Key Laboratory of Metabolism and Molecular Medicine, the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University Shanghai 200032 China
| | - Yongjun Dang
- Key Laboratory of Metabolism and Molecular Medicine, the Ministry of Education, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University Shanghai 200032 China
| | - Mingming Ma
- Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
| | - Wei Li
- Department of Medicinal Chemistry, China Pharmaceutical University 639 Longmian Avenue Nanjing Jiangsu 211198 China
| | - Biao Yu
- State Key Laboratory of Bio‐organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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11
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Saleem MZ, Alshwmi M, Zhang H, Din SRU, Nisar MA, Khan M, Alam S, Alam G, Jin L, Ma T. Inhibition of JNK-Mediated Autophagy Promotes Proscillaridin A- Induced Apoptosis via ROS Generation, Intracellular Ca +2 Oscillation and Inhibiting STAT3 Signaling in Breast Cancer Cells. Front Pharmacol 2020; 11:01055. [PMID: 33013353 PMCID: PMC7500466 DOI: 10.3389/fphar.2020.01055] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 06/29/2020] [Indexed: 01/16/2023] Open
Abstract
Breast cancer is the most heterogenous cancer type among women across the world. Despite concerted efforts, breast cancer management is still unsatisfactory. Interplay between apoptosis and autophagy is an imperative factor in categorizing therapeutics for cancer treatment. Proscillaridin A (PSD-A), a well-known cardiac glycoside used for cardiac arrest and arrythmias, has been unveiled in many cancer types but the underlying mechanism for apoptosis and autophagy in breast cancer is not fully understood. In our study, PSD-A restricted cell growth, inhibited STAT3 activation and induced apoptosis and autophagy in breast cancer cells via ROS generation and Ca+2 oscillation. Pretreatment of NAC and BAPTA-AM restored PSD-A induced cellular events in breast cancer cells. PSD-A induced apoptosis via DNA fragmentation, caspase-cascade activation, PARP cleavage, mitochondrial dysfunction, Bax/Bcl-2 proteins modulation and ER chaperone GRP78 inhibition along with decreased phosphorylation of ERK1/2. Inhibition of STAT3 activation was found to be associated with decreased phosphorylation of SRC. Moreover, PSD-A induced events of autophagy i.e. conversion of LC3-I to LC3-II, and Atg3 expression via JNK activation and decreased mTOR and AKT phosphorylation. In this study, pretreatment of SP600125, a JNK inhibitor, reduced autophagy and enhanced STAT3 inhibition and apoptosis. Additionally, SB203580, a commercial p38 inhibitor, stimulated STAT3 activation and improved autophagic events rate in breast cancer cells, displaying the role of the MAPK signaling pathway in interplay between apoptosis and autophagy. Our data suggest that the rate of apoptotic cell death is improved by blocking JNK-induced autophagy in PSD-A treated MCF-7 and MDA-MB-231 breast cancer cells.
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Affiliation(s)
| | - Mohammed Alshwmi
- Department of Clinical Laboratory, The First Affiliated Hospital of Dalian Medical University, Dalian Medical University, Dalian, China
| | - He Zhang
- College of Basic Medical Sciences, Dalian Medical University, Dalian, China
| | - Syed Riaz Ud Din
- College of Basic Medical Sciences, Dalian Medical University, Dalian, China
| | | | - Muhammad Khan
- Department of Zoology, University of the Punjab, Lahore, Pakistan
| | - Shahid Alam
- Department of Anatomy, Dalian Medical University, Dalian, China
| | - Gulzar Alam
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, China
| | - Lingling Jin
- College of Basic Medical Sciences, Dalian Medical University, Dalian, China
| | - Tonghui Ma
- College of Basic Medical Sciences, Dalian Medical University, Dalian, China.,School of Medicine and Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, China
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12
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Chovancova B, Liskova V, Babula P, Krizanova O. Role of Sodium/Calcium Exchangers in Tumors. Biomolecules 2020; 10:biom10091257. [PMID: 32878087 PMCID: PMC7563772 DOI: 10.3390/biom10091257] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 08/26/2020] [Accepted: 08/29/2020] [Indexed: 12/18/2022] Open
Abstract
The sodium/calcium exchanger (NCX) is a unique calcium transport system, generally transporting calcium ions out of the cell in exchange for sodium ions. Nevertheless, under special conditions this transporter can also work in a reverse mode, in which direction of the ion transport is inverted—calcium ions are transported inside the cell and sodium ions are transported out of the cell. To date, three isoforms of the NCX have been identified and characterized in humans. Majority of information about the NCX function comes from isoform 1 (NCX1). Although knowledge about NCX function has evolved rapidly in recent years, little is known about these transport systems in cancer cells. This review aims to summarize current knowledge about NCX functions in individual types of cancer cells.
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Affiliation(s)
- Barbora Chovancova
- Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 45 Bratislava, Slovakia; (B.C.); (V.L.)
| | - Veronika Liskova
- Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 45 Bratislava, Slovakia; (B.C.); (V.L.)
| | - Petr Babula
- Department of Physiology, Faculty of Medicine, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic;
| | - Olga Krizanova
- Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences, Dubravska cesta 9, 845 45 Bratislava, Slovakia; (B.C.); (V.L.)
- Department of Physiology, Faculty of Medicine, Masaryk University, Kamenice 753/5, 625 00 Brno, Czech Republic;
- Correspondence: ; Tel.: +4212-3229-5312
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13
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Ding X, Li Y, Li J, Yin Y. OSW-1 inhibits tumor growth and metastasis by NFATc2 on triple-negative breast cancer. Cancer Med 2020; 9:5558-5569. [PMID: 32515123 PMCID: PMC7402832 DOI: 10.1002/cam4.3196] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 04/21/2020] [Accepted: 05/11/2020] [Indexed: 01/01/2023] Open
Abstract
OSW‐1 is a natural compound extracted from the bulbs of Ornithogalum saundersiae in 1992. It has been shown strong antitumor activities in various cancer cells. However, the effects of OSW‐1 on tumor growth and metastasis in breast cancer are still poorly understood. In our research, we showed that OSW‐1 had a strong anticancer effect on breast cancer cells, but lower toxicity to normal cells. Accordingly, it also revealed significant inhibition of tumor growth by OSW‐1 in xenograft model. In addition, we performed Annexin V/PI‐labeled flow cytometric assay and TUNEL assay and showed that OSW‐1 inhibited tumor growth by inducing apoptosis. Furthermore, we carried out transwell assays and found that OSW‐1 significantly repressed the migratory and invasive capabilities of triple‐negative breast cancer (TNBC) cells via mediating epithelial‐mesenchymal transition. Besides, OSW‐1 also could inhibit metastasis in an orthotopic model and resulted in a longer survival compared with control group. Finally, we performed RNA‐sequencing and cellular functions to investigate the molecular mechanism of how OSW‐1 inhibits TNBC, and identified NFATc2 may as a pivotal factor for OSW‐1‐mediated effects on cell death, tumor growth, invasion, and migration.
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Affiliation(s)
- Xiaorong Ding
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.,Department of Oncology, The Affiliated Huaian No.1 People's Hospital of Nanjing Medical University, Huaian, China
| | - Yumei Li
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jun Li
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yongmei Yin
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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14
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Peretti D, Kim S, Tufi R, Lev S. Lipid Transfer Proteins and Membrane Contact Sites in Human Cancer. Front Cell Dev Biol 2020; 7:371. [PMID: 32039198 PMCID: PMC6989408 DOI: 10.3389/fcell.2019.00371] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 12/16/2019] [Indexed: 11/29/2022] Open
Abstract
Lipid-transfer proteins (LTPs) were initially discovered as cytosolic factors that facilitate lipid transport between membrane bilayers in vitro. Since then, many LTPs have been isolated from bacteria, plants, yeast, and mammals, and extensively studied in cell-free systems and intact cells. A major advance in the LTP field was associated with the discovery of intracellular membrane contact sites (MCSs), small cytosolic gaps between the endoplasmic reticulum (ER) and other cellular membranes, which accelerate lipid transfer by LTPs. As LTPs modulate the distribution of lipids within cellular membranes, and many lipid species function as second messengers in key signaling pathways that control cell survival, proliferation, and migration, LTPs have been implicated in cancer-associated signal transduction cascades. Increasing evidence suggests that LTPs play an important role in cancer progression and metastasis. This review describes how different LTPs as well as MCSs can contribute to cell transformation and malignant phenotype, and discusses how “aberrant” MCSs are associated with tumorigenesis in human.
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Affiliation(s)
- Diego Peretti
- UK Dementia Research Institute, Clinical Neurosciences Department, University of Cambridge, Cambridge, United Kingdom
| | - SoHui Kim
- Nakseongdae R&D Center, GPCR Therapeutics, Inc., Seoul, South Korea
| | - Roberta Tufi
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
| | - Sima Lev
- Molecular Cell Biology Department, Weizmann Institute of Science, Rehovot, Israel
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15
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Qu S, Yang K, Chen L, Liu M, Geng Q, He X, Li Y, Liu Y, Tian J. Cinnamaldehyde, a Promising Natural Preservative Against Aspergillus flavus. Front Microbiol 2019; 10:2895. [PMID: 31921070 PMCID: PMC6930169 DOI: 10.3389/fmicb.2019.02895] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 12/02/2019] [Indexed: 12/20/2022] Open
Abstract
The problem of food spoilage due to Aspergillus flavus (A. flavus) needs to be resolved. In this study, we found that the minimum inhibitory concentration of cinnamaldehyde (CA) that inhibited A. flavus was 0.065 mg/ml and that corn can be prevented from spoiling at a concentration of 0.13 mg/cm3. In addition to inhibiting spore germination, mycelial growth, and biomass production, CA can also reduce ergosterol synthesis and can cause cytomembrane damage. Our intention was to elucidate the antifungal mechanism of CA. Flow cytometry, fluorescence microscopy, and western blot were used to reveal that different concentrations of CA can cause a series of apoptotic events in A. flavus, including elevated Ca2+ and reactive oxygen species, decrease in mitochondrial membrane potential (Δψ m ), the release of cytochrome c, the activation of metacaspase, phosphatidylserine (PS) externalization, and DNA damage. Moreover, CA significantly increased the expression levels of apoptosis-related genes (Mst3, Stm1, AMID, Yca1, DAP3, and HtrA2). In summary, our results indicate that CA is a promising antifungal agent for use in food preservation.
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Affiliation(s)
- Su Qu
- College of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Kunlong Yang
- College of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Lei Chen
- College of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Man Liu
- College of Life Science, Jiangsu Normal University, Xuzhou, China
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China
| | - Qingru Geng
- College of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Xiaona He
- College of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Yongxin Li
- College of Life Science, Jiangsu Normal University, Xuzhou, China
| | - Yongguo Liu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China
| | - Jun Tian
- College of Life Science, Jiangsu Normal University, Xuzhou, China
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, China
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16
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Cui C, Yang J, Fu L, Wang M, Wang X. Progress in understanding mitochondrial calcium uniporter complex-mediated calcium signalling: A potential target for cancer treatment. Br J Pharmacol 2019; 176:1190-1205. [PMID: 30801705 DOI: 10.1111/bph.14632] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 01/02/2019] [Accepted: 01/29/2019] [Indexed: 12/15/2022] Open
Abstract
Due to its Ca2+ buffering capacity, the mitochondrion is one of the most important intracellular organelles in regulating Ca2+ dynamic oscillation. Mitochondrial calcium uniporter (MCU) is the primary mediator of Ca2+ influx into mitochondria, manipulating cell energy metabolism, ROS production, and programmed cell death, all of which are critical for carcinogenesis. The understanding of the uniporter complex was significantly boosted by recent groundbreaking discoveries that identified the uniporter pore-forming subunit MCU and its regulatory molecules, including MCU-dominant negative β subunit (MCUb), essential MCU regulator (EMRE), MCU regulator 1 (MCUR1), mitochondrial calcium uptake (MICU) 1, MICU2, and MICU3. These provide the means and molecular platform to investigate MCU complex (uniplex)-mediated impaired Ca2+ signalling in physiology and pathology. This review aims to summarize the progress of the understanding regulatory mechanisms of uniplex, roles of uniplex-mediated Ca2+ signalling in cancer, and potential pharmacological inhibitors of MCU.
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Affiliation(s)
- Chaochu Cui
- Henan Key Laboratory of Medical Tissue Regeneration, College of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China.,Henan Key Laboratory of Neurorestoratology, The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China.,State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jianbo Yang
- Henan Key Laboratory of Medical Tissue Regeneration, College of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
| | - Liwu Fu
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Mingyong Wang
- School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, China
| | - Xianwei Wang
- Henan Key Laboratory of Medical Tissue Regeneration, College of Basic Medical Sciences, Xinxiang Medical University, Xinxiang, China
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17
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Zhang Y, Feng T, Qu J, Sun N, Liu L. Toxicity and haemolytic activity of a newly described dinoflagellate, Heterocapsa bohainensis to the rotifer Brachionus plicatilis. HARMFUL ALGAE 2019; 84:112-118. [PMID: 31128795 DOI: 10.1016/j.hal.2019.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 03/18/2019] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
The algae Heterocapsa bohaiensis is a newly described species of dinoflagellate associated with Penaeus japonicus and larvae of Eriocheir sinensis in a coastal pond of Liaodong Bay China. The rotifer Brachionus plicatilis is used as live feed for aquaculture organisms including prawns and crabs larvae. To evaluate the potential toxicity of H. bohaiensis, the effects on Brachionus plicatilis and haemolytic activity were investigated in this study. The results showed that H. bohaiensis had significant toxic effect on B. plicatilis, and this effect was dependent on the cell concentration. Significant rotifer growth suppression was observed in the ruptured cells of H. bohaiensis with ultrasonic. Relatively similar rotifer mortalities were induced both in the light and in the dark. Interestingly, haemolysis to erythrocytes was also caused in a cell density-dependent and time-dependent manner, which meant the results of haemolytic activity were consistent with the toxicity. Therefore, haemolytic toxins were considered to be involved in the toxic mechanism of H. bohaiensis against rotifers. Then, the concentrations of calcium were measured in the mastax, stomach and ovary of B. plicatilis. Obviously increased fluorescence intensity was found in the stomach, which indicated the alteration of calcium homeostasis and membrane permeability after ingesting H. bohaiensis. These results implicated haemolytic activity as a causative factor linked to the toxicity of H. bohaiensis against B. plicatilis. The results contributed to research the production and control of H. bohaiensis toxins.
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Affiliation(s)
- Yiwen Zhang
- School of Food and Environment, Dalian University of Technology, NO. 2 Dagong Road, New District of Liaodong Bay, Panjin City, Liaoning Province, 124221, China.
| | - Tongtong Feng
- School of Food and Environment, Dalian University of Technology, NO. 2 Dagong Road, New District of Liaodong Bay, Panjin City, Liaoning Province, 124221, China
| | - Jing Qu
- School of Food and Environment, Dalian University of Technology, NO. 2 Dagong Road, New District of Liaodong Bay, Panjin City, Liaoning Province, 124221, China
| | - Na Sun
- Guanghe Crab Industry Limited Company, Panjin 124200, China
| | - Lifen Liu
- School of Food and Environment, Dalian University of Technology, NO. 2 Dagong Road, New District of Liaodong Bay, Panjin City, Liaoning Province, 124221, China
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18
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Bailly C, Waring MJ. Pharmacological effectors of GRP78 chaperone in cancers. Biochem Pharmacol 2019; 163:269-278. [PMID: 30831072 DOI: 10.1016/j.bcp.2019.02.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 02/28/2019] [Indexed: 12/21/2022]
Abstract
The protein chaperone GRP78 is a master regulator of endoplasmic reticulum (ER) functions and is frequently over-expressed at the surface of cancer cells where it contributes to chemo-resistance. It represents a well-studied ER stress marker but an under-explored target for new drug development. This review aims to untangle the structural and functional diversity of GRP78 modulators, covering over 130 natural products, synthetic molecules, specific peptides and monoclonal antibodies that target GRP78. Several approaches to promote or to incapacitate GRP78 are presented, including the use of oligonucleotides and specific cell-delivery peptides often conjugated to cytotoxic payloads to design GRP78-targeted therapeutics. A repertoire of drugs that turn on/off GRP78 is exposed, including molecules which bind directly to GRP78, principally to its ATP site. There exist many options to regulate positively or negatively the expression of the chaperone, or to interfere with its cellular trafficking. This review provides a molecular cartography of GRP78 pharmacological effectors and adds weight to the notion that GRP78 repressors could represent promising anticancer therapeutics, notably as regards limiting chemo-resistance of cancer cells. The potential of GRP78-targeting drugs in other therapeutic modalities is also evoked.
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Affiliation(s)
- Christian Bailly
- UMR-S 1172, Centre de Recherche Jean-Pierre Aubert, INSERM, University of Lille, CHU Lille, 59045 Lille, France.
| | - Michael J Waring
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1GA, UK
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19
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Roberts BL, Severance ZC, Bensen RC, Le AT, Kothapalli NR, Nuñez JI, Ma H, Wu S, Standke SJ, Yang Z, Reddig WJ, Blewett EL, Burgett AWG. Transient Compound Treatment Induces a Multigenerational Reduction of Oxysterol-Binding Protein (OSBP) Levels and Prophylactic Antiviral Activity. ACS Chem Biol 2019; 14:276-287. [PMID: 30576108 PMCID: PMC6379863 DOI: 10.1021/acschembio.8b00984] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
![]()
Oxysterol-binding
protein (OSBP) is a lipid transport and regulatory
protein required for the replication of Enterovirus genus viruses, which includes many significant human pathogens.
Short-term exposure (i.e., 1–6 h) to a low dose (i.e., 1 nM)
of the natural product compound OSW-1 induces a reduction of cellular
OSBP levels by ∼90% in multiple different cell lines with no
measurable cytotoxicity, defect in cellular proliferation, or global
proteome reduction. Interestingly, the reduction of OSBP levels persists
multiple days after the low-dose, transient OSW-1 compound treatment
is ended and the intracellular OSW-1 compound levels drop to undetectable
levels. The reduction in OSBP levels is inherited in multiple generations
of cells that are propagated after the OSW-1 compound treatment is
stopped. The enduring multiday, multigenerational reduction of OSBP
levels triggered by the OSW-1 compound is not due to proteasome degradation
of OSBP or due to a reduction in OSBP mRNA levels. OSW-1 compound
treatment induces transient autophagy in cells, but blocking autophagy
does not rescue OSBP levels. Although the specific cellular mechanism
of long-term OSBP repression is not yet identified, these results
clearly show the existence of an OSBP specific cellular regulation
process that is triggered upon treatment with an OSBP-binding compound.
The stable reduction of OSBP levels upon short-term, transient OSW-1
compound treatment will be a powerful tool to understand OSBP regulation
and cellular function. Additionally, the persistent reduction in OSBP
levels triggered by the transient OSW-1 compound treatment substantially
reduces viral replication in treated cells. Therefore, the long-term,
compound-induced reduction of OSBP in cells presents a new route to
broad spectrum anti-Enterovirus activity, including
as a novel route to antiviral prophylactic treatment through small
molecule targeting a human host protein.
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Affiliation(s)
- Brett L. Roberts
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Zachary C. Severance
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Ryan C. Bensen
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Anh T. Le
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Naga Rama Kothapalli
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Juan I. Nuñez
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Hongyan Ma
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Si Wu
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Shawna J. Standke
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - Zhibo Yang
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
| | - William J. Reddig
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, 1111 West 17th Street, Tulsa, Oklahoma 74107, United States
| | - Earl L. Blewett
- Department of Biochemistry and Microbiology, Oklahoma State University Center for Health Sciences, 1111 West 17th Street, Tulsa, Oklahoma 74107, United States
| | - Anthony W. G. Burgett
- Department of Chemistry and Biochemistry, The University of Oklahoma, 101 Stephenson Parkway, Norman, Oklahoma 73019, United States
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20
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Sun L, Wang R, Wang X, Dang Y, Li W, Yu B. Synthesis and antiproliferative activities of OSW-1 analogues bearing 2-acylamino-xylose residues. Org Chem Front 2019. [DOI: 10.1039/c9qo00462a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We synthesized 38 OSW-1 analogues with 2-acylamino xylose residues and found that the antitumor activities could be greatly enhanced.
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Affiliation(s)
- Lijun Sun
- Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
- State Key Laboratory of Bio-organic and Natural Products Chemistry
| | - Ruina Wang
- Key Laboratory of Metabolism and Molecular Medicine
- the Ministry of Education
- Department of Biochemistry and Molecular Biology
- School of Basic Medical Sciences
- Fudan University
| | - Xiaobo Wang
- Key Laboratory of Metabolism and Molecular Medicine
- the Ministry of Education
- Department of Biochemistry and Molecular Biology
- School of Basic Medical Sciences
- Fudan University
| | - Yongjun Dang
- Key Laboratory of Metabolism and Molecular Medicine
- the Ministry of Education
- Department of Biochemistry and Molecular Biology
- School of Basic Medical Sciences
- Fudan University
| | - Wei Li
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
| | - Biao Yu
- State Key Laboratory of Bio-organic and Natural Products Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
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21
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Advances in the antitumor activities and mechanisms of action of steroidal saponins. Chin J Nat Med 2018; 16:732-748. [PMID: 30322607 DOI: 10.1016/s1875-5364(18)30113-4] [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] [Received: 01/20/2018] [Indexed: 01/14/2023]
Abstract
The steroidal saponins are one of the saponin types that exist in an unbound state and have various pharmacological activities, such as anticancer, anti-inflammatory, antiviral, antibacterial and nerves-calming properties. Cancer is a growing health problem worldwide. Significant progress has been made to understand the antitumor effects of steroidal saponins in recent years. According to reported findings, steroidal saponins exert various antitumor activities, such as inhibiting proliferation, inducing apoptosis and autophagy, and regulating the tumor microenvironment, through multiple related signaling pathways. This article focuses on the advances in domestic and foreign studies on the antitumor activity and mechanism of actions of steroidal saponins in the last five years to provide a scientific basis and research ideas for further development and clinical application of steroidal saponins.
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22
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Cholestane glycosides from Ornithogalum saundersiae bulbs and the induction of apoptosis in HL-60 cells by OSW-1 through a mitochondrial-independent signaling pathway. J Nat Med 2018; 73:131-145. [DOI: 10.1007/s11418-018-1252-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 10/03/2018] [Indexed: 11/26/2022]
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23
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Tian J, Gan Y, Pan C, Zhang M, Wang X, Tang X, Peng X. Nerol-induced apoptosis associated with the generation of ROS and Ca 2+ overload in saprotrophic fungus Aspergillus flavus. Appl Microbiol Biotechnol 2018; 102:6659-6672. [PMID: 29860589 DOI: 10.1007/s00253-018-9125-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/10/2018] [Accepted: 05/12/2018] [Indexed: 12/12/2022]
Abstract
The contamination of food with Aspergillus flavus and subsequent aflatoxins is one of the most serious safety problems in the world. In this study of nerol (NEL)'s antifungal mechanism of action, we observed morphological and physiological changes in Aspergillus flavus. We found that NEL resulted in elevated levels of reactive oxygen species (ROS) and calcium ions (Ca2+). On ROS assays, compared with the controls, the proportion of fluorescent cells treated with concentrations of 0.25, 0.5, 1, and 2 μL/mL NEL increased to 8.4 ± 1.07%, 10.2 ± 1.72%, 13.4 ± 0.50%, and 26.2 ± 4.21%, respectively. Increased mitochondrial dysfunction and oxidative stress induced by the interactions between Ca2+ and ROS subsequently activate the release of cytochrome c and caspase activity. Characteristic changes of apoptosis were also observed via various detection methods, including phosphatidylserine externalization, nuclear condensation, and DNA fragmentation. Meanwhile, we found that the expression of CaMKs increased significantly in NEL-treated cells. In conclusion, our findings indicate that NEL has great potential as an eco-friendly antifungal agent for food preservation.
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Affiliation(s)
- Jun Tian
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China. .,Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing, 100048, People's Republic of China. .,Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China.
| | - Yeyun Gan
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Chao Pan
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Man Zhang
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China
| | - Xueyan Wang
- Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China
| | - Xudong Tang
- Key Lab for New Drug Research of TCM and Shenzhen Branch, State R&D Centre for Viro-Biotech, Research Institute of Tsinghua University in Shenzhen, Shenzhen, 518057, Guangdong, People's Republic of China.
| | - Xue Peng
- College of Life Science, Jiangsu Normal University, Xuzhou, 221116, Jiangsu Province, People's Republic of China.
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24
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Malabed R, Hanashima S, Murata M, Sakurai K. Sterol-recognition ability and membrane-disrupting activity of Ornithogalum saponin OSW-1 and usual 3-O-glycosyl saponins. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:2516-2525. [PMID: 28947142 DOI: 10.1016/j.bbamem.2017.09.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 09/05/2017] [Accepted: 09/18/2017] [Indexed: 12/14/2022]
Abstract
OSW-1 is a structurally unique steroidal saponin isolated from the bulbs of Ornithogalum saundersiae, and has exhibited highly potent and selective cytotoxicity in tumor cell lines. This study aimed to investigate the molecular mechanism for the membrane-permeabilizing activity of OSW-1 in comparison with those of other saponins by using various spectroscopic approaches. The membrane effects and hemolytic activity of OSW-1 were markedly enhanced in the presence of membrane cholesterol. Binding affinity measurements using fluorescent cholestatrienol and solid-state NMR spectroscopy of a 3-d-cholesterol probe suggested that OSW-1 interacts with membrane cholesterol without forming large aggregates while 3-O-glycosyl saponin, digitonin, forms cholesterol-containing aggregates. The results suggest that OSW-1/cholesterol interaction is likely to cause membrane permeabilization and pore formation without destroying the whole membrane integrity, which could partly be responsible for its highly potent cell toxicity.
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Affiliation(s)
- Raymond Malabed
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan; ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
| | - Shinya Hanashima
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
| | - Michio Murata
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan; ERATO, Lipid Active Structure Project, Japan Science and Technology Agency, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan.
| | - Kaori Sakurai
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei-shi, Tokyo 184-8588, Japan
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25
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Sakurai K, Hiraizumi M, Isogai N, Komatsu R, Shibata T, Ohta Y. Synthesis of a fluorescent photoaffinity probe of OSW-1 by site-selective acylation of an inactive congener and biological evaluation. Chem Commun (Camb) 2017; 53:517-520. [PMID: 27909709 DOI: 10.1039/c6cc08955k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A novel fluorescent photoaffinity probe of OSW-1 was prepared in two steps from a naturally occurring inactive congener by a sequential site-selective acylation strategy using Me2SnCl2. It displayed highly potent anticancer activity and a similar intracellular localization property to that of a fluorescently-tagged OSW-1, thereby demonstrating its potential utility in live cell studies.
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Affiliation(s)
- K Sakurai
- Tokyo University of Agriculture and Technology, Department of Biotechnology and Life Science, Koganei-shi, Tokyo 184-8588, Japan.
| | - M Hiraizumi
- Tokyo University of Agriculture and Technology, Department of Biotechnology and Life Science, Koganei-shi, Tokyo 184-8588, Japan.
| | - N Isogai
- Tokyo University of Agriculture and Technology, Department of Biotechnology and Life Science, Koganei-shi, Tokyo 184-8588, Japan.
| | - R Komatsu
- Tokyo University of Agriculture and Technology, Department of Biotechnology and Life Science, Koganei-shi, Tokyo 184-8588, Japan.
| | - T Shibata
- Tokyo University of Agriculture and Technology, Department of Biotechnology and Life Science, Koganei-shi, Tokyo 184-8588, Japan.
| | - Y Ohta
- Tokyo University of Agriculture and Technology, Department of Biotechnology and Life Science, Koganei-shi, Tokyo 184-8588, Japan.
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Yun X, Rao W, Xiao C, Huang Q. Apoptosis of leukemia K562 and Molt-4 cells induced by emamectin benzoate involving mitochondrial membrane potential loss and intracellular Ca 2+ modulation. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 52:280-287. [PMID: 28525847 DOI: 10.1016/j.etap.2017.04.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 04/11/2017] [Accepted: 04/15/2017] [Indexed: 06/07/2023]
Abstract
Leukemia threatens millions of people's health and lives, and the pesticide-induced leukemia has been increasingly concerned because of the etiologic exposure. In this paper, cytotoxic effect of emamectin benzoate (EMB), an excellent natural-product insecticide, was evaluated through monitoring cell viability, cell apoptosis, mitochondrial membrane potential and intracellular Ca2+ concentration ([Ca2+]i) in leukemia K562 and Molt-4 cells. Following the exposure to EMB, cell viability was decreased and positive apoptosis of K562 and Molt-4 cells was increased in a concentration- and time- dependent fashion. In the treatment of 10μM EMB, apoptotic cells accounted for 93.0% to K562 cells and 98.9% to Molt-4 cells based on the control, meanwhile, 63.47% of K562 cells and 81.15% of Molt-4 cells exhibited late apoptotic and necrotic features with damaged cytoplasmic membrane. 48h exposure to 10μM EMB increased significantly the great number of cells with mitochondrial membrane potential (MMP) loss, and the elevation of [Ca2+]i level was peaked and persisted within 70s in K562 cells whilst 50s in Molt-4 cells. Moreover, a stronger cytotoxicity of EMB was further observed than that of imatinib. The results authenticate the efficacious effect of EMB as a potential anti-leukemia agent and an inconsistency with regard to insecticide-induced leukemia.
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Affiliation(s)
- Xinming Yun
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Wenbing Rao
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
| | - Ciying Xiao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qingchun Huang
- Shanghai Key Lab of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China.
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27
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Zhang Y, Fang F, Fan K, Zhang Y, Zhang J, Guo H, Yu P, Ma J. Effective cytotoxic activity of OSW-1 on colon cancer by inducing apoptosis in vitro and in vivo. Oncol Rep 2017; 37:3509-3519. [PMID: 28440433 DOI: 10.3892/or.2017.5582] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 02/22/2017] [Indexed: 11/05/2022] Open
Abstract
As a natural compound, Ornithogalum caudatum Ait is primarily used as an anti-inflammatory and antitumor agent in Chinese folk medicine. In 1992, OSW-1 was isolated from this compound, which is a new member of cholestane saponin family. In numerous recent studies, OSW-1 has been shown to have powerful cytotoxic anticancer effects against various malignant cells. However, the therapeutic efficacy of OSW-1 on colon cancer and the underlying mechanism are not understood. To explore the mechanism underlying OSW-1 in antitumor therapy, a therapeutic function analysis of OSW-1 on colon cancer was performed in vitro and in vivo. It was shown that with low toxicity on normal colonic cells, OSW-1 suppresses colon cancer cells in vitro and this inhibition was via the intrinsic apoptotic pathway, which increased cellular calcium, changed mitochondrial membrane potential, disrupted mitochondrial morphology, and led to the release of cytochrome c and the activation of caspase-3. Furthermore, in a nude mouse model, OSW-1 had a powerful effect on suppressing colon tumor proliferation without significant side effects through the apoptosis pathway. Taken together, these results demonstrate that OSW-1 is a potential drug for colon cancer treatment.
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Affiliation(s)
- Yanhong Zhang
- Graduate School of Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Fengqi Fang
- The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Kai Fan
- Department of Anatomy, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Yanli Zhang
- Department of Anatomy, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Jie Zhang
- The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Huishu Guo
- Centralab, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116044, P.R. China
| | - Peiyao Yu
- The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Jianmei Ma
- Department of Anatomy, Dalian Medical University, Dalian, Liaoning 116044, P.R. China
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Liu X, Liang J, Jin J, Li H, Mei B, Jin X. OSW-1 Induced Apoptosis in Hepatocellular Carcinoma through Generation of ROS, Cytochrome C and Noxa Activation Independent of p53 with Non-Activation of Caspase-3. Chin Med 2017. [DOI: 10.4236/cm.2017.81001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Cui C, Merritt R, Fu L, Pan Z. Targeting calcium signaling in cancer therapy. Acta Pharm Sin B 2017; 7:3-17. [PMID: 28119804 PMCID: PMC5237760 DOI: 10.1016/j.apsb.2016.11.001] [Citation(s) in RCA: 372] [Impact Index Per Article: 53.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 10/28/2016] [Indexed: 12/15/2022] Open
Abstract
The intracellular calcium ions (Ca2+) act as second messenger to regulate gene transcription, cell proliferation, migration and death. Accumulating evidences have demonstrated that intracellular Ca2+ homeostasis is altered in cancer cells and the alteration is involved in tumor initiation, angiogenesis, progression and metastasis. Targeting derailed Ca2+ signaling for cancer therapy has become an emerging research area. This review summarizes some important Ca2+ channels, transporters and Ca2+-ATPases, which have been reported to be altered in human cancer patients. It discusses the current research effort toward evaluation of the blockers, inhibitors or regulators for Ca2+ channels/transporters or Ca2+-ATPase pumps as anti-cancer drugs. This review is also aimed to stimulate interest in, and support for research into the understanding of cellular mechanisms underlying the regulation of Ca2+ signaling in different cancer cells, and to search for novel therapies to cure these malignancies by targeting Ca2+ channels or transporters.
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Key Words
- 20-GPPD, 20-O-β-D-glucopyranosyl-20(S)-protopanaxadiol
- Apoptosis
- CBD, cannabidiol
- CBG, cannabigerol
- CPZ, capsazepine
- CRAC, Ca2+ release-activated Ca2+ channel
- CTL, cytotoxic T cells
- CYP3A4, cytochrome P450 3A4
- Ca2+ channels
- CaM, calmodulin
- CaMKII, calmodulin-dependent protein kinase II
- Cancer therapy
- Cell proliferation
- Channel blockers;
- ER/SR, endoplasmic/sarcoplasmic reticulum
- HCX, H+/Ca2+ exchangers
- IP3, inositol 1,4,5-trisphosphate
- IP3R (1, 2, 3), IP3 receptor (type 1, type 2, type 3)
- MCU, mitochondrial Ca2+ uniporter
- MCUR1, MCU uniporter regulator 1
- MICU (1, 2, 3), mitochondrial calcium uptake (type 1, type 2, type 3)
- MLCK, myosin light-chain kinase
- Migration
- NCX, Na+/Ca2+ exchanger
- NF-κB, nuclear factor-κB
- NFAT, nuclear factor of activated T cells
- NSCLC, non-small cell lung cancer
- OSCC, oral squamous cell carcinoma cells
- PKC, protein kinase C
- PM, plasma membrane
- PMCA, plasma membrane Ca2+-ATPase
- PTP, permeability transition pore
- ROS, reactive oxygen species
- RyR, ryanodine receptor
- SERCA, SR/ER Ca2+-ATPase
- SOCE, store-operated Ca2+ entry
- SPCA, secretory pathway Ca2+-ATPase
- Store-operated Ca2+ entry
- TEA, tetraethylammonium
- TG, thapsigargin
- TPC2, two-pore channel 2
- TRIM, 1-(2-(trifluoromethyl) phenyl) imidazole
- TRP (A, C, M, ML, N, P, V), transient receptor potential (ankyrin, canonical, melastatin, mucolipin, no mechanoreceptor potential C, polycystic, vanilloid)
- VGCC, voltage-gated Ca2+ channel
- mAb, monoclonal antibody
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Affiliation(s)
- Chaochu Cui
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
- Department of Surgery, Division of Thoracic Surgery, The Ohio State University, Columbus, OH 43210, USA
| | - Robert Merritt
- Department of Surgery, Division of Thoracic Surgery, The Ohio State University, Columbus, OH 43210, USA
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Liwu Fu
- State Key Laboratory of Oncology in South China; Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Zui Pan
- Department of Surgery, Division of Thoracic Surgery, The Ohio State University, Columbus, OH 43210, USA
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
- College of Nursing and Health Innovation, The University of Texas at Arlington, Arlington, TX 76019, USA
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Zhang J, Wang Y, Sun KM, Fang K, Tang X. A study of oxidative stress induced by two polybrominated diphenyl ethers in the rotifer Brachionus plicatilis. MARINE POLLUTION BULLETIN 2016; 113:408-413. [PMID: 27765404 DOI: 10.1016/j.marpolbul.2016.10.032] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/12/2016] [Accepted: 10/13/2016] [Indexed: 06/06/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are widely dispersed persistent organic pollutants in the marine ecosystem. However, their toxic mechanisms in marine organisms, especially invertebrates, remain poorly understood. Two common congeners of PBDEs, tetrabrominated diphenyl ether-47 (BDE-47) and decabrominated diphenyl ether-209 (BDE-209), were investigated. Their toxic mechanisms, with a focus on oxidative stress, were examined in rotifer Brachionus plicatilis. Overproduction of reactive oxygen species (ROS) was induced by two PBDEs. The expression of superoxide dismutase (SOD) mRNA was increased, suggesting SOD play a main role in ROS-scavenging. The intercellular concentrations of calcium ([Ca2+]in) and the expression of calmodulin (CaM) mRNA were increased. This indicates the calcium ion (Ca2+) signaling channel is involved in PBDEs stress. Further analysis showed that the reproductive system might be the target site for toxicity of PBDEs. Moreover, high value of detection indexes in BDE-47 experimental groups suggested BDE-47 might cause higher oxidative damage than BDE-209 in rotifers.
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Affiliation(s)
- Jing Zhang
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - You Wang
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
| | - Kai-Ming Sun
- The First Institute of Oceanography (FIO), State Oceanic Administration (SOA), Qingdao 266061, China
| | - Kuan Fang
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
| | - Xuexi Tang
- Department of Marine Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China.
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31
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NFκB activation demarcates a subset of hepatocellular carcinoma patients for targeted therapy. Cell Oncol (Dordr) 2016; 39:523-536. [DOI: 10.1007/s13402-016-0294-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2016] [Indexed: 12/16/2022] Open
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32
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Liu C, Wang AP, Jin L, Guo Y, Li Y, Zhao Z, Lei P. Synthesis, conformational analysis and SAR research of OSW-1 analogues. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.05.049] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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33
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The counterflow transport of sterols and PI4P. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:940-951. [PMID: 26928592 DOI: 10.1016/j.bbalip.2016.02.024] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 02/23/2016] [Accepted: 02/24/2016] [Indexed: 02/03/2023]
Abstract
Cholesterol levels in intracellular membranes are constantly adjusted to match with specific organelle functions. Cholesterol is kept high in the plasma membrane (PM) because it is essential for its barrier function, while low levels are found in the endoplasmic reticulum (ER) where cholesterol mediates feedback control of its own synthesis by sterol-sensor proteins. The ER→Golgi→PM concentration gradient of cholesterol in mammalian cells, and ergosterol in yeast, appears to be sustained by specific intracellular transport processes, which are mostly mediated by lipid transfer proteins (LTPs). Here we review a recently described function of two LTPs, OSBP and its yeast homolog Osh4p, which consists in creating a sterol gradient between membranes by vectorial transport. OSBP also contributes to the formation of ER/Golgi membrane contact sites, which are important hubs for the transfer of several lipid species. OSBP and Osh4p organize a counterflow transport of lipids whereby sterols are exchanged for the phosphoinositide PI4P, which is used as a fuel to drive sterol transport. This article is part of a Special Issue entitled: The cellular lipid landscape edited by Tim P. Levine and Anant K. Menon.
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Yamada R, Hiraizumi M, Narita S, Sakurai K. Two-Step Synthesis of a Clickable Photoaffinity Probe from an Anticancer Saponin OSW-1 and its Photochemical Reactivity. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201500505] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Rika Yamada
- Department of Biotechnology and Life Science; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho Koganei-shi Tokyo 184-8588 Japan
| | - Masato Hiraizumi
- Department of Biotechnology and Life Science; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho Koganei-shi Tokyo 184-8588 Japan
| | - Sho Narita
- Department of Biotechnology and Life Science; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho Koganei-shi Tokyo 184-8588 Japan
| | - Kaori Sakurai
- Department of Biotechnology and Life Science; Tokyo University of Agriculture and Technology; 2-24-16, Naka-cho Koganei-shi Tokyo 184-8588 Japan
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Sheehy RM, Kuder CH, Bachman Z, Hohl RJ. Calcium and P-glycoprotein independent synergism between schweinfurthins and verapamil. Cancer Biol Ther 2015; 16:1259-68. [PMID: 26046259 DOI: 10.1080/15384047.2015.1056420] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Schweinfurthins are intriguing natural products with anti-cancer activities and as yet incompletely understood mechanisms of action. We investigated whether inhibitors of P-glycoprotein (Pgp), in a manner analogous to other natural products, might enhance schweinfurthins' growth inhibitory actions by increasing intracellular schweinfurthin levels. Both the schweinfurthin-sensitive glioblastoma multiforme cell line SF-295 and relatively insensitive lung carcinoma cell line A549 were treated with 2 schweinfurthin analogs: 3-deoxyschweinfurthin B-p-nitro bis-stilbene (3dSB-PNBS) and 5'-methylschweinfurthin G (methyl-G). There was a synergistic enhancement of growth inhibition with the combination of the Pgp inhibitor verapamil and both analogs in SF-295 cells. Methyl-G, verapamil, and the combination did not result in alterations to intracellular calcium concentration. Verapamil increased the intracellular concentration of 3dSB-PNBS in both SF-295 and A549 cells in a Pgp-independent manner. Methyl-G, verapamil, and the combination do not result in increased ER stress. Methyl-G increased the intracellular concentration of a known Pgp substrate, Rhodamine 123 in SF-295 cells. Reduction of cellular cholesterol leads to the accumulation of Pgp substrates, as Pgp requires cholesterol for proper function. Since 3dSB enhances lovastatin-induced upregulation of the cholesterol efflux pump ABCA1, it is intriguing that co-treatment with cholesterol rescued the methyl-G-induced increase in Rhodamine 123 intracellular concentration. These studies support the hypothesis that verapamil potentiates the schweinfurthin growth inhibitory effect by increasing its intracellular concentration.
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Key Words
- 3dSB, 3-deoxyschweinfurthin B
- 3dSB-PNBS, 3-deoxyschweinfurthin B p-nitro bis-stilbene
- BAPTA-AM, 1,2-bis(o-aminophenoxy)ethane-N,N,N',N'-tetraacetic acid
- CI, combination index
- DMP-PNBS, 3,4-dimethoxypheny-p-nitro bis-stilbene
- ER, endoplasmic reticulum
- GBM, Glioblastoma Multiforme
- MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- Methyl-G, 5'-methoxyschweinfurthin G
- NCI, National Cancer Institute
- PARP, poly-ADP-ribose polymerase
- Pgp, P-glycoprotein drug efflux pump
- cholesterol metabolism
- drug efflux pump
- glioblastoma multiforme
- oxysterol binding protein
- p-glycoprotein
- schweinfurthin
- verapamil
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Affiliation(s)
- Ryan M Sheehy
- a Department of Pharmacology ; University of Iowa ; Iowa City , IA USA
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36
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Abstract
Lipid metabolism is regulated by multiple signaling pathways, and generates a variety of bioactive lipid molecules. These bioactive lipid molecules known as signaling molecules, such as fatty acid, eicosanoids, diacylglycerol, phosphatidic acid, lysophophatidic acid, ceramide, sphingosine, sphingosine-1-phosphate, phosphatidylinositol-3 phosphate, and cholesterol, are involved in the activation or regulation of different signaling pathways. Lipid metabolism participates in the regulation of many cellular processes such as cell growth, proliferation, differentiation, survival, apoptosis, inflammation, motility, membrane homeostasis, chemotherapy response, and drug resistance. Bioactive lipid molecules promote apoptosis via the intrinsic pathway by modulating mitochondrial membrane permeability and activating different enzymes including caspases. In this review, we discuss recent data in the fields of lipid metabolism, lipid-mediated apoptosis, and cancer therapy. In conclusion, understanding the underlying molecular mechanism of lipid metabolism and the function of different lipid molecules could provide the basis for cancer cell death rationale, discover novel and potential targets, and develop new anticancer drugs for cancer therapy.
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Sakurai K, Takeshita T, Hiraizumi M, Yamada R. Synthesis of OSW-1 Derivatives by Site-Selective Acylation and Their Biological Evaluation. Org Lett 2014; 16:6318-21. [DOI: 10.1021/ol503044j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kaori Sakurai
- Tokyo University of Agriculture and Technology, Department of Biotechnology
and Life Science, Koganei-shi, Tokyo 184-8588, Japan
| | - Tomoya Takeshita
- Tokyo University of Agriculture and Technology, Department of Biotechnology
and Life Science, Koganei-shi, Tokyo 184-8588, Japan
| | - Masato Hiraizumi
- Tokyo University of Agriculture and Technology, Department of Biotechnology
and Life Science, Koganei-shi, Tokyo 184-8588, Japan
| | - Rika Yamada
- Tokyo University of Agriculture and Technology, Department of Biotechnology
and Life Science, Koganei-shi, Tokyo 184-8588, Japan
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38
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Guo D, Du Y, Wu Q, Jiang W, Bi H. Disrupted calcium homeostasis is involved in elevated zinc ion-induced photoreceptor cell death. Arch Biochem Biophys 2014; 560:44-51. [PMID: 25051343 DOI: 10.1016/j.abb.2014.07.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Revised: 07/01/2014] [Accepted: 07/11/2014] [Indexed: 01/02/2023]
Abstract
Zinc (Zn), the second abundant trace element in living organisms, plays an important role in regulating cell metabolism, signaling, proliferation, gene expression and apoptosis. Meanwhile, the overload of Zn will disrupt the intracellular calcium homeostasis via impairing mitochondrial function. However, the specific molecular mechanism underlying zinc-induced calcium regulation remains poorly understood. In the present study, using zinc chloride (ZnCl2) as a stressor, we investigated the effect of exogenous Zn(2+) in regulating murine photoreceptor cell viability, reactive oxygen species (ROS), cell cycle distribution and calcium homeostasis as well as plasma membrane calcium ATPase (PMCA) isoforms (PMCA1 and PMCA2, i.e., ATP2B1, ATP2B2) expression. We found that the exogenous Zn(2+) in the exposure range (31.25-125.0 μmol/L) results in the overgeneration of ROS, cell cycle arrest at G2/M phases, elevation of cytosolic [Ca(2+)], inactivation of Ca(2+)-ATPase and reduction of both PMCA1 and PMCA2 in 661 W cells, and thus induces cell death. In conclusion, ZnCl2 exposure can elevate the cytosolic [Ca(2+)], disrupt the intracellular calcium homeostasis, further initiate Ca(2+)-dependent signaling pathway in 661 W cells, and finally cause cell death. Our results will facilitate the understanding of cell death induced by the zinc ion-mediated calcium homeostasis disruption.
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Affiliation(s)
- Dadong Guo
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases in Universities of Shandong, Eye Institute of Shandong University of Traditional Chinese Medicine, Jinan 250002, China
| | - Yuxiang Du
- Shandong University of Traditional Chinese Medicine, Jinan 250002, China
| | - Qiuxin Wu
- Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250002, China
| | - Wenjun Jiang
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases in Universities of Shandong, Eye Institute of Shandong University of Traditional Chinese Medicine, Jinan 250002, China
| | - Hongsheng Bi
- Shandong Provincial Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases, Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Therapy of Ocular Diseases in Universities of Shandong, Eye Institute of Shandong University of Traditional Chinese Medicine, Jinan 250002, China.
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Charman M, Colbourne TR, Pietrangelo A, Kreplak L, Ridgway ND. Oxysterol-binding protein (OSBP)-related protein 4 (ORP4) is essential for cell proliferation and survival. J Biol Chem 2014; 289:15705-17. [PMID: 24742681 DOI: 10.1074/jbc.m114.571216] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Oxysterol-binding protein (OSBP) and OSBP-related proteins (ORPs) comprise a large gene family with sterol/lipid transport and regulatory activities. ORP4 (OSBP2) is a closely related paralogue of OSBP, but its function is unknown. Here we show that ORP4 binds similar sterol and lipid ligands as OSBP and other ORPs but is uniquely required for the proliferation and survival of cultured cells. Recombinant ORP4L and a variant without a pleckstrin homology (PH) domain (ORP4S) bind 25-hydroxycholesterol and extract and transfer cholesterol between liposomes. Two conserved histidine residues in the OSBP homology domain ORP4 are essential for binding phosphatidylinositol 4-phosphate but not sterols. The PH domain of ORP4L also binds phosphatidylinositol 4-phosphate in the Golgi apparatus. However, in the context of ORP4L, the PH domain is required for normal organization of the vimentin network. Unlike OSBP, RNAi silencing of all ORP4 variants (including a partial PH domain truncation termed ORP4M) in HEK293 and HeLa cells resulted in growth arrest but not cell death. ORP4 silencing in non-transformed intestinal epithelial cells (IEC)-18 caused apoptosis characterized by caspase 3 and poly(ADP-ribose) polymerase processing, DNA cleavage, and JNK phosphorylation. IEC-18 transformed with oncogenic H-Ras have increased expression of ORP4L and ORP4S proteins and are resistant to the growth-inhibitory effects of ORP4 silencing. Results suggest that ORP4 promotes the survival of rapidly proliferating cells.
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Affiliation(s)
- Mark Charman
- From the Departments of Pediatrics, Biochemistry and Molecular Biology, and
| | - Terry R Colbourne
- From the Departments of Pediatrics, Biochemistry and Molecular Biology, and
| | | | - Laurent Kreplak
- Physics and Atmospheric Sciences, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Neale D Ridgway
- From the Departments of Pediatrics, Biochemistry and Molecular Biology, and
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Yamada R, Takeshita T, Hiraizumi M, Shinohe D, Ohta Y, Sakurai K. Fluorescent analog of OSW-1 and its cellular localization. Bioorg Med Chem Lett 2014; 24:1839-42. [PMID: 24613377 DOI: 10.1016/j.bmcl.2014.02.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 01/30/2014] [Accepted: 02/04/2014] [Indexed: 11/30/2022]
Abstract
OSW-1 is a steroidal saponin, which has emerged as an attractive anticancer agent with highly cancer cell selective activity. A fluorescent analog was prepared from the natural product to analyze its cellular uptake and localization. We found that the fluorescent analog is rapidly internalized into cells and is primarily distributed in endoplasmic reticulum and Golgi apparatus.
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Affiliation(s)
- Rika Yamada
- Tokyo University of Agriculture and Technology, School of Engineering, Koganei-shi, Tokyo 184-8588, Japan
| | - Tomoya Takeshita
- Tokyo University of Agriculture and Technology, School of Engineering, Koganei-shi, Tokyo 184-8588, Japan
| | - Masato Hiraizumi
- Tokyo University of Agriculture and Technology, School of Engineering, Koganei-shi, Tokyo 184-8588, Japan
| | - Daisuke Shinohe
- Tokyo University of Agriculture and Technology, School of Engineering, Koganei-shi, Tokyo 184-8588, Japan
| | - Yoshihiro Ohta
- Tokyo University of Agriculture and Technology, School of Engineering, Koganei-shi, Tokyo 184-8588, Japan
| | - Kaori Sakurai
- Tokyo University of Agriculture and Technology, School of Engineering, Koganei-shi, Tokyo 184-8588, Japan.
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Olkkonen VM, Li S. Oxysterol-binding proteins: Sterol and phosphoinositide sensors coordinating transport, signaling and metabolism. Prog Lipid Res 2013; 52:529-38. [DOI: 10.1016/j.plipres.2013.06.004] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 06/15/2013] [Accepted: 06/22/2013] [Indexed: 01/27/2023]
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Abstract
In the current study, two of the most environmentally relevant Polybrominated diphenyl ethers (PBDEs) were individually evaluated for toxic effects on rotifer Brachionus plicatilis. The results showed that the life span declined significantly in all treatment groups (0.05mg/L, 0.1mg/L, 0.2mg/L BDE-47 and BDE-209) compared to the control, and BDE-47 caused significant decrease compared to BDE-209 at 0.2mg/L treatment group. Significant increases of intracellular levels of reactive oxygen species (ROS) occurred in all treatment groups except for 0.05mg/L BDE-209 treatment group compared to the control, and significant increases were observed in all BDE-47 treatment groups compared to the equivalent treatment groups of BDE-209. Meanwhile significant increases of intracellular calcium levels ([Ca2+]in) occurred in 0.1mg/L, 0.2mg/L BDE-47 and 0.2mg/L BDE-209 treatment groups compared to the control, and BDE-47 cause significant increase compared to BDE-209 at 0.2mg/L treatment group. The present study demonstrated that life span, ROS and Ca2+ were involved in PBDEs toxic effects, and toxicities of BDE-47 were higher than BDE-209. Otherwise, the toxic effects in both BDE-47 and BDE-209 were similar, which suggest that the toxic effects of two PBDEs congeners may be caused by the same toxic mechanism of action.
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