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Ribeiro R, Costa L, Pinto E, Sousa E, Fernandes C. Therapeutic Potential of Marine-Derived Cyclic Peptides as Antiparasitic Agents. Mar Drugs 2023; 21:609. [PMID: 38132930 PMCID: PMC10745025 DOI: 10.3390/md21120609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 11/18/2023] [Accepted: 11/23/2023] [Indexed: 12/23/2023] Open
Abstract
Parasitic diseases still compromise human health. Some of the currently available therapeutic drugs have limitations considering their adverse effects, questionable efficacy, and long treatment, which have encouraged drug resistance. There is an urgent need to find new, safe, effective, and affordable antiparasitic drugs. Marine-derived cyclic peptides have been increasingly screened as candidates for developing new drugs. Therefore, in this review, a systematic analysis of the scientific literature was performed and 25 marine-derived cyclic peptides with antiparasitic activity (1-25) were found. Antimalarial activity is the most reported (51%), followed by antileishmanial (27%) and antitrypanosomal (20%) activities. Some compounds showed promising antiparasitic activity at the nM scale, being active against various parasites. The mechanisms of action and targets for some of the compounds have been investigated, revealing different strategies against parasites.
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Affiliation(s)
- Ricardo Ribeiro
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (R.R.); (L.C.); (E.S.)
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal;
| | - Lia Costa
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (R.R.); (L.C.); (E.S.)
| | - Eugénia Pinto
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal;
- Laboratório de Microbiologia, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Emília Sousa
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (R.R.); (L.C.); (E.S.)
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal;
| | - Carla Fernandes
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal; (R.R.); (L.C.); (E.S.)
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4050-208 Matosinhos, Portugal;
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Montuori E, Hyde CAC, Crea F, Golding J, Lauritano C. Marine Natural Products with Activities against Prostate Cancer: Recent Discoveries. Int J Mol Sci 2023; 24:ijms24021435. [PMID: 36674949 PMCID: PMC9865900 DOI: 10.3390/ijms24021435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/05/2023] [Accepted: 01/07/2023] [Indexed: 01/12/2023] Open
Abstract
Prostate cancer is the most common cancer in men, with over 52,000 new cases diagnosed every year. Diagnostics and early treatment are potentially hindered by variations in screening protocols, still largely reliant on serum levels of acid phosphatase and prostate-specific antigen, with tumour diagnosis and grading relying on histopathological examination. Current treatment interventions vary in terms of efficacy, cost and severity of side effects, and relapse can be aggressive and resistant to the current standard of care. For these reasons, the scientific community is looking for new chemotherapeutic agents. This review reports compounds and extracts derived from marine organisms as a potential source of new drugs against prostate cancer. Whilst there are several marine-derived compounds against other cancers, such as multiple myeloma, leukemia, breast and lung cancer, already available in the market, the presently collated findings show how the marine environment can be considered to hold potential as a new drug source for prostate cancer, as well. This review presents information on compounds presently in clinical trials, as well as new compounds/extracts that may enter trials in the future. We summarise information regarding mechanisms of action and active concentrations.
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Affiliation(s)
- Eleonora Montuori
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Viale F. Stagno d’Alcontres 31, 98166 Messina, Italy
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Via Acton 55, 80133 Napoli, Italy
| | - Caroline A. C. Hyde
- Cancer Research Group, School of Life Health and Chemical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
| | - Francesco Crea
- Cancer Research Group, School of Life Health and Chemical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
| | - Jon Golding
- Cancer Research Group, School of Life Health and Chemical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
| | - Chiara Lauritano
- Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Via Acton 55, 80133 Napoli, Italy
- Cancer Research Group, School of Life Health and Chemical Sciences, The Open University, Walton Hall, Milton Keynes MK7 6AA, UK
- Correspondence: ; Tel.: +39-0815833221
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Cao R, Yang ZS, Hu SL, Liang SJ, Zhang SM, Zhu SQ, Lu L, Long CH, Yao ST, Ma YJ, Liang XH. Molecular Mechanism of Mouse Uterine Smooth Muscle Regulation on Embryo Implantation. Int J Mol Sci 2022; 23:ijms232012494. [PMID: 36293350 PMCID: PMC9604262 DOI: 10.3390/ijms232012494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 10/01/2022] [Accepted: 10/10/2022] [Indexed: 11/16/2022] Open
Abstract
Myometrium plays critical roles in multiple processes such as embryo spacing through peristalsis during mouse implantation, indicating vital roles of smooth muscle in the successful establishment and quality of implantation. Actin, a key element of cytoskeleton structure, plays an important role in the movement and contraction of smooth muscle cells (SMCs). However, the function of peri-implantation uterine smooth muscle and the regulation mechanism of muscle tension are still unclear. This study focused on the molecular mechanism of actin assembly regulation on implantation in smooth muscle. Phalloidin is a highly selective bicyclic peptide used for staining actin filaments (also known as F-actin). Phalloidin staining showed that F-actin gradually weakened in the CD-1 mouse myometrium from day 1 to day 4 of early pregnancy. More than 3 mice were studied for each group. Jasplakinolide (Jasp) used to inhibit F-actin depolymerization promotes F-actin polymerization in SMCs during implantation window and consequently compromises embryo implantation quality. Transcriptome analysis following Jasp treatment in mouse uterine SMCs reveals significant molecular changes associated with actin assembly. Tagln is involved in the regulation of the cell cytoskeleton and promotes the polymerization of G-actin to F-actin. Our results show that Tagln expression is gradually reduced in mouse uterine myometrium from day 1 to 4 of pregnancy. Furthermore, progesterone inhibits the expression of Tagln through the progesterone receptor. Using siRNA to knock down Tagln in day 3 SMCs, we found that phalloidin staining is decreased, which confirms the critical role of Tagln in F-actin polymerization. In conclusion, our data suggested that decreases in actin assembly in uterine smooth muscle during early pregnancy is critical to optimal embryo implantation. Tagln, a key molecule involved in actin assembly, regulates embryo implantation by controlling F-actin aggregation before implantation, suggesting moderate uterine contractility is conducive to embryo implantation. This study provides new insights into how the mouse uterus increases its flexibility to accommodate implanting embryos in the early stage of pregnancy.
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Ahmed S, Alam W, Jeandet P, Aschner M, Alsharif KF, Saso L, Khan H. Therapeutic Potential of Marine Peptides in Prostate Cancer: Mechanistic Insights. Mar Drugs 2022; 20:md20080466. [PMID: 35892934 PMCID: PMC9330892 DOI: 10.3390/md20080466] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/15/2022] [Accepted: 07/18/2022] [Indexed: 02/07/2023] Open
Abstract
Prostate cancer (PCa) is the leading cause of cancer death in men, and its treatment is commonly associated with severe adverse effects. Thus, new treatment modalities are required. In this context, natural compounds have been widely explored for their anti-PCa properties. Aquatic organisms contain numerous potential medications. Anticancer peptides are less toxic to normal cells and provide an efficacious treatment approach via multiple mechanisms, including altered cell viability, apoptosis, cell migration/invasion, suppression of angiogenesis and microtubule balance disturbances. This review sheds light on marine peptides as efficacious and safe therapeutic agents for PCa.
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Affiliation(s)
- Salman Ahmed
- Department of Pharmacognosy, Faculty of Pharmacy and Pharmaceutical Sciences, University of Karachi, Karachi 75270, Pakistan;
| | - Waqas Alam
- Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan;
| | - Philippe Jeandet
- Research Unit “Induced Resistance and Plant Bioprotection”, Department of Biology and Biochemistry, Faculty of Sciences, University of Reims, EA 4707-USC INRAe 1488, SFR Condorcet FR CNRS 3417, P.O. Box 1039, CEDEX 02, 51687 Reims, France;
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA;
| | - Khalaf F. Alsharif
- Department of Clinical Laboratory, College of Applied Medical Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;
| | - Luciano Saso
- Department of Physiology and Pharmacology, “Vittorio Erspamer” Sapienza University, 00185 Rome, Italy;
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan;
- Correspondence:
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Bai B, Chen Q, Jing R, He X, Wang H, Ban Y, Ye Q, Xu W, Zheng C. Molecular Basis of Prostate Cancer and Natural Products as Potential Chemotherapeutic and Chemopreventive Agents. Front Pharmacol 2021; 12:738235. [PMID: 34630112 PMCID: PMC8495205 DOI: 10.3389/fphar.2021.738235] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 09/06/2021] [Indexed: 12/12/2022] Open
Abstract
Prostate cancer is the second most common malignant cancer in males. It involves a complex process driven by diverse molecular pathways that closely related to the survival, apoptosis, metabolic and metastatic characteristics of aggressive cancer. Prostate cancer can be categorized into androgen dependent prostate cancer and castration-resistant prostate cancer and cure remains elusive due to the developed resistance of the disease. Natural compounds represent an extraordinary resource of structural scaffolds with high diversity that can offer promising chemical agents for making prostate cancer less devastating and curable. Herein, those natural compounds of different origins and structures with potential cytotoxicity and/or in vivo anti-tumor activities against prostate cancer are critically reviewed and summarized according to the cellular signaling pathways they interfere. Moreover, the anti-prostate cancer efficacy of many nutrients, medicinal plant extracts and Chinese medical formulations were presented, and the future prospects for the application of these compounds and extracts were discussed. Although the failure of conventional chemotherapy as well as involved serious side effects makes natural products ideal candidates for the treatment of prostate cancer, more investigations of preclinical and even clinical studies are necessary to make use of these medical substances reasonably. Therefore, the elucidation of structure-activity relationship and precise mechanism of action, identification of novel potential molecular targets, and optimization of drug combination are essential in natural medicine research and development.
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Affiliation(s)
- Bingke Bai
- Department of Chinese Medicine Authentication, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Qianbo Chen
- Department of Anesthesiology, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, China
| | - Rui Jing
- Department of Chinese Medicine Authentication, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Xuhui He
- Department of Chinese Medicine Authentication, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Hongrui Wang
- Department of Chinese Medicine Authentication, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Yanfei Ban
- Department of Chinese Medicine Authentication, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Qi Ye
- Department of Biological Science, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Weiheng Xu
- Department of Biochemical Pharmacy, School of Pharmacy, Second Military Medical University, Shanghai, China
| | - Chengjian Zheng
- Department of Chinese Medicine Authentication, School of Pharmacy, Second Military Medical University, Shanghai, China
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A novel peptidomimetic therapeutic for selective suppression of lung cancer stem cells over non-stem cancer cells. Bioorg Chem 2021; 116:105340. [PMID: 34530236 DOI: 10.1016/j.bioorg.2021.105340] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 08/17/2021] [Accepted: 09/05/2021] [Indexed: 12/21/2022]
Abstract
Cancers are highly heterogeneous and typically contain a small subset of drug-resisting cells called tumor initiating cells or cancer stem cells (CSCs). CSCs can self-renew, divide asymmetrically, and often cause tumor invasion and metastasis. Therefore, treatments specifically targeting CSCs are critical to improve patient survival. Recently, we identified a highly specific peptidomimetic (peptoid - PCS2) that selectively binds to the CSC subpopulation of lung cancer over the remaining cancer cells (non-CSCs). Subsequently, we identified plectin as the target of PCS2. Plectin is an intracellular structural protein, which is involved in tumor invasion and metastasis when it appears on cell surface. While PCS2 monomer did not display any anti-cancer activity, we designed a series of homo-dimeric versions of PCS2, and identified PCS2D1.2 optimized homo-dimer that displayed highly specific cytotoxicity towards CSCs over non-CSCs. PCS2D1.2 effectively blocked the in vitro colony formation and cell migration, hallmarks of CSCs. Furthermore, PCS2D1.2 reduced the in vivo tumor formation. In both in vitro and in vivo studies, PCS2D1.2 effectively reduced plectin expression and/or plectin-rich CSCs, but had no effect on non-CSCs. Therefore, PCS2D1.2 has the potential to be developed as a highly CSC specific drug candidate, which can be used in combination with current anti-cancer drugs.
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Rodat-Despoix L, Chamlali M, Ouadid-Ahidouch H. Ion channels as key partners of cytoskeleton in cancer disease. Biochim Biophys Acta Rev Cancer 2021; 1876:188627. [PMID: 34520803 DOI: 10.1016/j.bbcan.2021.188627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 09/08/2021] [Accepted: 09/08/2021] [Indexed: 12/14/2022]
Abstract
Several processes occur during tumor development including changes in cell morphology, a reorganization of the expression and distribution of the cytoskeleton proteins as well as ion channels. If cytoskeleton proteins and ion channels have been widely investigated in understanding cancer mechanisms, the interaction between these two elements and the identification of the associated signaling pathways are only beginning to emerge. In this review, we summarize the work published over the past 15 years relating to the roles played by ion channels in these mechanisms of reorganization of the cellular morphology, essential to metastatic dissemination, both through the physical interactions with elements of the cytoskeleton and by intracellular signaling pathways involved.
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Affiliation(s)
- Lise Rodat-Despoix
- Laboratoire de Physiologie Cellulaire et Moléculaire (UR 4667), Université de Picardie Jules Verne, UFR des Sciences, 33 Rue St Leu, 80039 Amiens, France.
| | - Mohamed Chamlali
- Laboratoire de Physiologie Cellulaire et Moléculaire (UR 4667), Université de Picardie Jules Verne, UFR des Sciences, 33 Rue St Leu, 80039 Amiens, France
| | - Halima Ouadid-Ahidouch
- Laboratoire de Physiologie Cellulaire et Moléculaire (UR 4667), Université de Picardie Jules Verne, UFR des Sciences, 33 Rue St Leu, 80039 Amiens, France
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Nin DS, Wujanto C, Tan TZ, Lim D, Damen JMA, Wu KY, Dai ZM, Lee ZW, Idres SB, Leong YH, Jha S, Ng JSY, Low JJH, Chang SC, Tan DSP, Wu W, Choo BA, Deng LW. GAGE mediates radio resistance in cervical cancers via the regulation of chromatin accessibility. Cell Rep 2021; 36:109621. [PMID: 34469741 DOI: 10.1016/j.celrep.2021.109621] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 06/03/2021] [Accepted: 08/05/2021] [Indexed: 11/16/2022] Open
Abstract
Radiotherapy (RT) resistance is a major cause of treatment failure in cancers that use definitive RT as their primary treatment modality. This study identifies the cancer/testis (CT) antigen G antigen (GAGE) as a mediator of radio resistance in cervical cancers. Elevated GAGE expression positively associates with de novo RT resistance in clinical samples. GAGE, specifically the GAGE12 protein variant, confers RT resistance through synemin-dependent chromatin localization, promoting the association of histone deacetylase 1/2 (HDAC1/2) to its inhibitor actin. This cumulates to elevated histone 3 lysine 56 acetylation (H3K56Ac) levels, increased chromatin accessibility, and improved DNA repair efficiency. Molecular or pharmacological disruption of the GAGE-associated complex restores radiosensitivity. Molecularly, this study demonstrates the role of GAGE in the regulation of chromatin dynamics. Clinically, this study puts forward the utility of GAGE as a pre-screening biomarker to identify poor responders at initial diagnosis and the therapeutic potential of agents that target GAGE and its associated complex in combination with radiotherapy to improve outcomes.
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Affiliation(s)
- Dawn Sijin Nin
- Department of Biochemistry, Yong Loo Lin School of Medicine (YLLSOM), National University of Singapore (NUS), Singapore 117596, Singapore; NUS Center for Cancer Research, YLLSOM, NUS, Singapore 117599, Singapore.
| | - Caryn Wujanto
- Department of Radiation Oncology, National University Hospital (NUH), Singapore 119074, Singapore; National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore
| | - Tuan Zea Tan
- Cancer Science Institute of Singapore, NUS, Singapore 117599, Singapore
| | - Diana Lim
- Department of Pathology, NUH, Singapore 119074, Singapore; National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore
| | - J Mirjam A Damen
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht , the Netherlands
| | - Kuan-Yi Wu
- Department of Biochemical Science and Technology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Ziyu Melvin Dai
- Department of Biochemistry, Yong Loo Lin School of Medicine (YLLSOM), National University of Singapore (NUS), Singapore 117596, Singapore
| | - Zheng-Wei Lee
- Department of Biochemistry, Yong Loo Lin School of Medicine (YLLSOM), National University of Singapore (NUS), Singapore 117596, Singapore
| | - Shabana Binte Idres
- Department of Biochemistry, Yong Loo Lin School of Medicine (YLLSOM), National University of Singapore (NUS), Singapore 117596, Singapore
| | - Yiat Horng Leong
- Department of Radiation Oncology, National University Hospital (NUH), Singapore 119074, Singapore; National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore
| | - Sudhakar Jha
- Department of Biochemistry, Yong Loo Lin School of Medicine (YLLSOM), National University of Singapore (NUS), Singapore 117596, Singapore; Cancer Science Institute of Singapore, NUS, Singapore 117599, Singapore; National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore; Department of Physiological Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK, USA; NUS Center for Cancer Research, YLLSOM, NUS, Singapore 117599, Singapore
| | - Joseph Soon-Yau Ng
- National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore; Department of Obstetrics and Gynecology, YLLSOM, NUS, Singapore 119228, Singapore
| | - Jeffrey J H Low
- National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore; Department of Obstetrics and Gynecology, YLLSOM, NUS, Singapore 119228, Singapore
| | - Shih-Chung Chang
- Department of Biochemical Science and Technology, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - David Shao Peng Tan
- Cancer Science Institute of Singapore, NUS, Singapore 117599, Singapore; National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore; Department of Hematology-Oncology, NUHS, Singapore 119228, Singapore; NUS Center for Cancer Research, YLLSOM, NUS, Singapore 117599, Singapore
| | - Wei Wu
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht , the Netherlands
| | - Bok Ai Choo
- Department of Radiation Oncology, National University Hospital (NUH), Singapore 119074, Singapore; National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore
| | - Lih-Wen Deng
- Department of Biochemistry, Yong Loo Lin School of Medicine (YLLSOM), National University of Singapore (NUS), Singapore 117596, Singapore; National University Cancer Institute, Singapore National University Health System (NUHS), Singapore 119074, Singapore; NUS Center for Cancer Research, YLLSOM, NUS, Singapore 117599, Singapore; NUS Graduate School - Integrative Sciences and Engineering Programme, NUS, Singapore 119077, Singapore.
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Vlassakis J, Hansen LL, Higuchi-Sanabria R, Zhou Y, Tsui CK, Dillin A, Huang H, Herr AE. Measuring expression heterogeneity of single-cell cytoskeletal protein complexes. Nat Commun 2021; 12:4969. [PMID: 34404787 PMCID: PMC8371148 DOI: 10.1038/s41467-021-25212-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Accepted: 07/23/2021] [Indexed: 02/07/2023] Open
Abstract
Multimeric cytoskeletal protein complexes orchestrate normal cellular function. However, protein-complex distributions in stressed, heterogeneous cell populations remain unknown. Cell staining and proximity-based methods have limited selectivity and/or sensitivity for endogenous multimeric protein-complex quantification from single cells. We introduce micro-arrayed, differential detergent fractionation to simultaneously detect protein complexes in hundreds of individual cells. Fractionation occurs by 60 s size-exclusion electrophoresis with protein complex-stabilizing buffer that minimizes depolymerization. Proteins are measured with a ~5-hour immunoassay. Co-detection of cytoskeletal protein complexes in U2OS cells treated with filamentous actin (F-actin) destabilizing Latrunculin A detects a unique subpopulation (~2%) exhibiting downregulated F-actin, but upregulated microtubules. Thus, some cells may upregulate other cytoskeletal complexes to counteract the stress of Latrunculin A treatment. We also sought to understand the effect of non-chemical stress on cellular heterogeneity of F-actin. We find heat shock may dysregulate filamentous and globular actin correlation. In this work, our assay overcomes selectivity limitations to biochemically quantify single-cell protein complexes perturbed with diverse stimuli.
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Affiliation(s)
- Julea Vlassakis
- Department of Bioengineering, University of California Berkeley, Berkeley, CA, USA
| | - Louise L Hansen
- Department of Bioengineering, University of California Berkeley, Berkeley, CA, USA
| | - Ryo Higuchi-Sanabria
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA, USA
| | - Yun Zhou
- Division of Biostatistics, University of California Berkeley, Berkeley, CA, USA
| | - C Kimberly Tsui
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA, USA
| | - Andrew Dillin
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA, USA
- Howard Hughes Medical Institute, University of California Berkeley, Berkeley, CA, USA
| | - Haiyan Huang
- Department of Statistics, University of California Berkeley, Berkeley, CA, USA
- Center for Computational Biology, University of California Berkeley, Berkeley, CA, USA
| | - Amy E Herr
- Department of Bioengineering, University of California Berkeley, Berkeley, CA, USA.
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Yamazaki S, Ueno Y, Hosoki R, Saito T, Idehara T, Yamaguchi Y, Otani C, Ogawa Y, Harata M, Hoshina H. THz irradiation inhibits cell division by affecting actin dynamics. PLoS One 2021; 16:e0248381. [PMID: 34339441 PMCID: PMC8328307 DOI: 10.1371/journal.pone.0248381] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 07/17/2021] [Indexed: 11/25/2022] Open
Abstract
Biological phenomena induced by terahertz (THz) irradiation are described in recent reports, but underlying mechanisms, structural and dynamical change of specific molecules are still unclear. In this paper, we performed time-lapse morphological analysis of human cells and found that THz irradiation halts cell division at cytokinesis. At the end of cytokinesis, the contractile ring, which consists of filamentous actin (F-actin), needs to disappear; however, it remained for 1 hour under THz irradiation. Induction of the functional structures of F-actin was also observed in interphase cells. Similar phenomena were also observed under chemical treatment (jasplakinolide), indicating that THz irradiation assists actin polymerization. We previously reported that THz irradiation enhances the polymerization of purified actin in vitro; our current work shows that it increases cytoplasmic F-actin in vivo. Thus, we identified one of the key biomechanisms affected by THz waves.
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Affiliation(s)
- Shota Yamazaki
- Terahertz Sensing and Imaging Research Team, RIKEN Center for Advanced Photonics, Sendai, Miyagi, Japan
- * E-mail: (SY); (MH); (HH)
| | - Yuya Ueno
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Ryosuke Hosoki
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Takanori Saito
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
| | - Toshitaka Idehara
- Research Center for Development of Far-Infrared Region, University of Fukui (FIR UF), Bunkyo, Fukui, Japan
| | - Yuusuke Yamaguchi
- Research Center for Development of Far-Infrared Region, University of Fukui (FIR UF), Bunkyo, Fukui, Japan
| | - Chiko Otani
- Terahertz Sensing and Imaging Research Team, RIKEN Center for Advanced Photonics, Sendai, Miyagi, Japan
| | - Yuichi Ogawa
- Laboratory of Bio-Sensing Engineering, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, Japan
| | - Masahiko Harata
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi, Japan
- * E-mail: (SY); (MH); (HH)
| | - Hiromichi Hoshina
- Terahertz Sensing and Imaging Research Team, RIKEN Center for Advanced Photonics, Sendai, Miyagi, Japan
- * E-mail: (SY); (MH); (HH)
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11
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Yang K, Luo M, Li H, Abdulrehman G, Kang L. Effects of jasplakinolide on cytotoxicity, cytoskeleton and apoptosis in two different colon cancer cell lines treated with m-THPC-PDT. Photodiagnosis Photodyn Ther 2021; 35:102425. [PMID: 34214686 DOI: 10.1016/j.pdpdt.2021.102425] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 04/25/2021] [Accepted: 06/25/2021] [Indexed: 12/28/2022]
Abstract
Colorectal cancer (CRC) is a common malignant tumor, and metastasis is one of the most important challenges in the treatment of CRC. Photodynamic therapy (PDT) is a novel and non-invasive treatment that influence cytoskeleton and to reduce cancer metastases. In addition, cytoskeleton is related to cancer metastases. Two isogenic colorectal cancer cell lines SW480 and SW620 were used in the present study, we found that m-THPC mediated PDT changed the cytotoxicity, apoptosis and cytoskeleton in both cell lines. Interestingly, the expression of intermediate filaments protein cytokeratin18 were different in the two cell lines. In order to further confirm the relationship between cytoskeleton and cell migration, we combined with microfilament stabilizer jasplakinolide (JASP) to observe the effects of microfilaments on cell migration, cytotoxicity and apoptosis. Taken together, these findings suggest that m-THPC-PDT could induce cytoplasmic cytoskeleton destruction in both types of cells, especially on microfilaments and microtubules. Moreover, in SW480 cells, microtubules may participate in the apoptosis process induced by m-THPC-PDT, while microfilaments may participate in the process of m-THPC-PDT inhibiting cell migration. But in SW620 cells, only microfilaments may be involved in m-THPC-PDT induced apoptosis and inhibition of cell migration.
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Affiliation(s)
- Kaizhen Yang
- Teaching & Research Department, The First People's Hospital of Urumqi, 1 Jiankang Road, Urumqi, Xinjiang Uygur Autonomous Region, China.
| | - Mengyu Luo
- School of Public Health, Xinjiang Medical University, 567 SHangde North Road, Urumqi, Xinjiang Uygur Autonomous Region, China.
| | - Hongxia Li
- School of Public Health, Xinjiang Medical University, 567 SHangde North Road, Urumqi, Xinjiang Uygur Autonomous Region, China.
| | - Gulinur Abdulrehman
- Cancer Hospital of The Third Affiliated Hospital of Xinjiang Medical University, 789 Suzhou East Road, Urumqi, Xinjiang Uygur Autonomous Region, China.
| | - Ling Kang
- School of Public Health, Xinjiang Medical University, 567 SHangde North Road, Urumqi, Xinjiang Uygur Autonomous Region, China.
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12
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Takahashi Y, Hiratsuka S, Machida N, Takahashi D, Matsushita J, Hozak P, Misteli T, Miyamoto K, Harata M. Impairment of nuclear F-actin formation and its relevance to cellular phenotypes in Hutchinson-Gilford progeria syndrome. Nucleus 2021; 11:250-263. [PMID: 32954953 PMCID: PMC7529414 DOI: 10.1080/19491034.2020.1815395] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Hutchinson-Gilford progeria syndrome (HGPS) is a premature aging disorder caused by a mutation of lamin A, which contributes to nuclear architecture and the spatial organization of chromatin in the nucleus. The expression of a lamin A mutant, named progerin, leads to functional and structural disruption of nuclear organization. Since progerin lacks a part of the actin-binding site of lamin A, we hypothesized that nuclear actin dynamics and function are altered in HGPS cells. Nuclear F-actin is required for the organization of nuclear shape, transcriptional regulation, DNA damage repair, and activation of Wnt/β-catenin signaling. Here we show that the expression of progerin decreases nuclear F-actin and impairs F-actin-regulated transcription. When nuclear F-actin levels are increased by overexpression of nuclear-targeted actin or by using jasplakinolide, a compound that stabilizes F-actin, the irregularity of nuclear shape and defects in gene expression can be reversed. These observations provide evidence for a novel relationship between nuclear actin and the etiology of HGPS.
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Affiliation(s)
- Yuto Takahashi
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Shogo Hiratsuka
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Nanako Machida
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Daisuke Takahashi
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Junpei Matsushita
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
| | - Pavel Hozak
- Institute of Molecular Genetics of the Czech Academy of Sciences , Prague, Czech Republic
| | - Tom Misteli
- National Cancer Institute, National Institutes of Health , Bethesda, MD, USA
| | - Kei Miyamoto
- Laboratory of Molecular Developmental Biology, Faculty of Biology-Oriented Science and Technology, Kindai University , Wakayama, Japan
| | - Masahiko Harata
- Laboratory of Molecular Biology, Graduate School of Agricultural Science, Tohoku University , Sendai, Japan
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Datta A, Deng S, Gopal V, Yap KCH, Halim CE, Lye ML, Ong MS, Tan TZ, Sethi G, Hooi SC, Kumar AP, Yap CT. Cytoskeletal Dynamics in Epithelial-Mesenchymal Transition: Insights into Therapeutic Targets for Cancer Metastasis. Cancers (Basel) 2021; 13:cancers13081882. [PMID: 33919917 PMCID: PMC8070945 DOI: 10.3390/cancers13081882] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/08/2021] [Accepted: 04/12/2021] [Indexed: 12/14/2022] Open
Abstract
In cancer cells, a vital cellular process during metastasis is the transformation of epithelial cells towards motile mesenchymal cells called the epithelial to mesenchymal transition (EMT). The cytoskeleton is an active network of three intracellular filaments: actin cytoskeleton, microtubules, and intermediate filaments. These filaments play a central role in the structural design and cell behavior and are necessary for EMT. During EMT, epithelial cells undergo a cellular transformation as manifested by cell elongation, migration, and invasion, coordinated by actin cytoskeleton reorganization. The actin cytoskeleton is an extremely dynamic structure, controlled by a balance of assembly and disassembly of actin filaments. Actin-binding proteins regulate the process of actin polymerization and depolymerization. Microtubule reorganization also plays an important role in cell migration and polarization. Intermediate filaments are rearranged, switching to a vimentin-rich network, and this protein is used as a marker for a mesenchymal cell. Hence, targeting EMT by regulating the activities of their key components may be a potential solution to metastasis. This review summarizes the research done on the physiological functions of the cytoskeleton, its role in the EMT process, and its effect on multidrug-resistant (MDR) cancer cells-highlight some future perspectives in cancer therapy by targeting cytoskeleton.
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Affiliation(s)
- Arpita Datta
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
| | - Shuo Deng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
| | - Vennila Gopal
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
| | - Kenneth Chun-Hong Yap
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore;
| | - Clarissa Esmeralda Halim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
| | - Mun Leng Lye
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
| | - Mei Shan Ong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
| | - Tuan Zea Tan
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117593, Singapore;
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore;
- Cancer Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
| | - Shing Chuan Hooi
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
- Cancer Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
| | - Alan Prem Kumar
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore;
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117593, Singapore;
- Cancer Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
- National University Cancer Institute, National University Health System, Singapore 119074, Singapore
- Correspondence: (A.P.K.); (C.T.Y); Tel.: +65-6873-5456 (A.P.K.); +65-6516-3294 (C.T.Y.); Fax: +65-6873-9664 (A.P.K.); +65-6778-8161 (C.T.Y.)
| | - Celestial T. Yap
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (A.D.); (S.D.); (V.G.); (K.C.-H.Y.); (C.E.H.); (M.L.L.); (M.S.O.); (S.C.H.)
- Cancer Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore
- National University Cancer Institute, National University Health System, Singapore 119074, Singapore
- Correspondence: (A.P.K.); (C.T.Y); Tel.: +65-6873-5456 (A.P.K.); +65-6516-3294 (C.T.Y.); Fax: +65-6873-9664 (A.P.K.); +65-6778-8161 (C.T.Y.)
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Haque F, Khan MSA, AlQurashi N. ROS-Mediated Necrosis by Glycolipid Biosurfactants on Lung, Breast, and Skin Melanoma Cells. Front Oncol 2021; 11:622470. [PMID: 33796459 PMCID: PMC8009627 DOI: 10.3389/fonc.2021.622470] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 01/20/2021] [Indexed: 12/24/2022] Open
Abstract
Cancer is one of the major leading causes of death worldwide. Designing the new anticancer drugs is remained a challenging task due to ensure complexicity of cancer etiology and continuosly emerging drug resistance. Glycolipid biosurfactants are known to possess various biological activities including antimicrobial, anticancer and antiviral properties. In the present study, we sought to decipher the mechanism of action of the glycolipids (lactonic-sophorolipd, acidic-sophorolipid, glucolipid, and bolalipid) against cancer cells using lung cancer cell line (A549), breast cancer cell line (MDA-MB 231), and mouse skin melanoma cell line (B16F10). Scratch assay and fluorescence microscopy revealed that glycolipids inhibit tumorous cell migration possibly by inhibiting actin filaments. Fluorescence activated cell sorter (FACS) analysis exhibited that lactonic sophorolipid and glucolipid both induced the reactive oxygen species, altered the mitochondrial membrane potential (ΔΨ) and finally led to the cell death by necrosis. Furthermore, combinatorial effect of lactonic-sophorolipd and glucolipid demonstrated synergistic interaction on A549 cell line whereas additive effect on MDA-MB 231 and B16F10 cell lines. Our study has highlighted that lactonic-sophorolipd and glucolipid could be useful for developing new anticancer drugs either alone or in combination.
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Affiliation(s)
- Farazul Haque
- Department of Immunology and Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Mohd Sajjad Ahmad Khan
- Department of Basic Sciences, Deanship of Preparatory Year and Supporting Studies, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Naif AlQurashi
- Department of Basic Sciences, Deanship of Preparatory Year and Supporting Studies, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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15
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Ali R, Mir HA, Hamid R, Shah RA, Khanday FA, Bhat SS. Jasplakinolide Attenuates Cell Migration by Impeding Alpha-1-syntrophin Protein Phosphorylation in Breast Cancer Cells. Protein J 2021; 40:234-244. [PMID: 33515365 DOI: 10.1007/s10930-021-09963-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/12/2021] [Indexed: 01/01/2023]
Abstract
BACKGROUND Alpha-1-syntrophin (SNTA1) is emerging as a novel modulator of the actin cytoskeleton. SNTA1 binds to F-actin and regulates intracellular localization and activity of various actin organizing signaling molecules. Aberration in syntrophin signaling has been closely linked with deregulated growth connected to tumor development/metastasis and its abnormal over expression has been observed in breast cancer. In the present work the effect of jasplakinolide, an actin-binding cyclodepsipeptide, on the SNTA1 protein activity and SNTA1 mediated downstream cellular events was studied in MDA-MB-231 breast cancer cell line. METHODS SNTA1 protein levels and phosphorylation status were determined in MDA-MB-231 cells post jasplakinolide exposure using western blotting and immunoprecipitation techniques respectively. MDA-MB-231 cells were transfected with WT SNTA1 and DM SNTA1 (Y215/229 phospho mutant) and simultaneously treated with jasplakinolide. The effect of jasplakinolide and SNTA1 protein on cell migration was determined using the boyden chamber assay. RESULTS Jasplakinolide treatment decreases proliferation of MDA-MB-231 cells in both dose and time dependent manner. Results suggest that subtoxic doses of jasplakinolide induce morphological changes in MDA-MB-231 cells from flat spindle shape adherent cells to round weakly adherent forms. Mechanistically, jasplakinolide treatment was found to decrease SNTA1 protein levels and its tyrosine phosphorylation status. Moreover, migratory potential of jasplakinolide treated cells was significantly inhibited in comparison to control cells. CONCLUSION Our results demonstrate that jasplakinolide inhibits cell migration by impairing SNTA1 functioning in breast cancer cells.
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Affiliation(s)
- Roshia Ali
- Department of Biotechnology, University of Kashmir, Hazratbal, Srinagar, J&K, 190006, India
- Department of Biochemistry, University of Kashmir, Srinagar, J&K, 190006, India
| | - Hilal Ahmad Mir
- Department of Biotechnology, University of Kashmir, Hazratbal, Srinagar, J&K, 190006, India
| | - Rabia Hamid
- Department of Nanotechnology, University of Kashmir, Srinagar, J&K, 190006, India
| | - Riaz A Shah
- Division of Biotechnology, FVSc & AH, SKUAST-K, Shuhama, Srinagar, J&K, India
| | - Firdous A Khanday
- Department of Biotechnology, University of Kashmir, Hazratbal, Srinagar, J&K, 190006, India.
| | - Sahar Saleem Bhat
- Division of Biotechnology, FVSc & AH, SKUAST-K, Shuhama, Srinagar, J&K, India.
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16
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Kappler S, Siebert A, Kazmaier U. Synthesis of New Cyclopeptide Analogues of the Miuraenamides. Curr Org Synth 2021; 18:418-424. [PMID: 33441075 DOI: 10.2174/1570179418666210113161550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/05/2020] [Accepted: 11/21/2020] [Indexed: 11/22/2022]
Abstract
INTRODUCTION Miuraenamides belong to natural marine compounds with interesting biological properties. MATERIALS AND METHODS Miuraenamides initiate polymerization of monomeric actin and therefore show high cytotoxicity by influencing the cytoskeleton. New derivatives of the miuraenamides have been synthesized containing an N-methylated amide bond instead of the more easily hydrolysable ester in the natural products. RESULTS Incorporation of an aromatic side chain onto the C-terminal amino acid of the tripeptide fragment also led to highly active new miuraenamides. CONCLUSION In this study, we showed that the ester bond of the natural product miuraenamide can be replaced by an N-methyl amide. The yields in the cyclization step were high and generally much better than with the corresponding esters. On the other hand, the biological activity of the new amide analogs was lower compared to the natural products, but the activity could significantly be increased by incorporation of a p-nitrophenyl group at the C-terminus of the peptide fragment.
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Affiliation(s)
- Sarah Kappler
- Institute of Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany
| | - Andreas Siebert
- Institute of Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany
| | - Uli Kazmaier
- Institute of Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken, Germany
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Liu Y, Zhang T, Zhang H, Li J, Zhou N, Fiskesund R, Chen J, Lv J, Ma J, Zhang H, Tang K, Cheng F, Zhou Y, Zhang X, Wang N, Huang B. Cell Softness Prevents Cytolytic T-cell Killing of Tumor-Repopulating Cells. Cancer Res 2020; 81:476-488. [PMID: 33168645 DOI: 10.1158/0008-5472.can-20-2569] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/23/2020] [Accepted: 11/04/2020] [Indexed: 11/16/2022]
Abstract
Biomechanics is a fundamental feature of a cell. However, the manner by which actomysin tension affects tumor immune evasion remains unclear. Here we show that although cytotoxic T lymphocytes (CTL) can effectively destroy stiff differentiated tumor cells, they fail to kill soft tumor-repopulating cells (TRC). TRC softness prevented membrane pore formation caused by CTL-released perforin. Perforin interacting with nonmuscle myosin heavy-chain 9 transmitted forces to less F-actins in soft TRC, thus generating an inadequate contractile force for perforin pore formation. Stiffening TRC allowed perforin the ability to drill through the membrane, leading to CTL-mediated killing of TRC. Importantly, overcoming mechanical softness in human TRC also enhanced TRC cell death caused by human CTL, potentiating a mechanics-based immunotherapeutic strategy. These findings reveal a mechanics-mediated tumor immune evasion, thus potentially providing an alternative approach for tumor immunotherapy. SIGNIFICANCE: Tumor-repopulating cells evade CD8+ cytolytic T-cell killing through a mechanical softness mechanism, underlying the impediment of perforin pore formation at the immune synapse site.
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Affiliation(s)
- Yuying Liu
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China.
- Clinical Immunology Center, CAMS, Beijing, China
| | - Tianzhen Zhang
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China
| | - Haizeng Zhang
- National Cancer Center/Cancer Hospital, CAMS, Beijing, China
| | - Jiping Li
- Beijing Smartchip Microelectronics Technology Company Limited, Beijing, China
| | - Nannan Zhou
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China
| | - Roland Fiskesund
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China
- Karolinska Institutet Medical School, Stockholm, Sweden
| | - Junwei Chen
- Laboratory for Cellular Biomechanics and Regenerative Medicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Jiadi Lv
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China
| | - Jingwei Ma
- Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huafeng Zhang
- Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ke Tang
- Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Feiran Cheng
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China
| | - Yabo Zhou
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China
| | - Xiaohui Zhang
- Peking University People's Hospital, Peking University Institute of Hematology, Beijing, China
| | - Ning Wang
- Department of Mechanical Science and Engineering, College of Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois
| | - Bo Huang
- Department of Immunology and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences (CAMS) and Peking Union Medical College, Beijing, China.
- Clinical Immunology Center, CAMS, Beijing, China
- Department of Biochemistry and Molecular Biology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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18
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Ong MS, Deng S, Halim CE, Cai W, Tan TZ, Huang RYJ, Sethi G, Hooi SC, Kumar AP, Yap CT. Cytoskeletal Proteins in Cancer and Intracellular Stress: A Therapeutic Perspective. Cancers (Basel) 2020; 12:cancers12010238. [PMID: 31963677 PMCID: PMC7017214 DOI: 10.3390/cancers12010238] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/14/2020] [Accepted: 01/16/2020] [Indexed: 12/20/2022] Open
Abstract
Cytoskeletal proteins, which consist of different sub-families of proteins including microtubules, actin and intermediate filaments, are essential for survival and cellular processes in both normal as well as cancer cells. However, in cancer cells, these mechanisms can be altered to promote tumour development and progression, whereby the functions of cytoskeletal proteins are co-opted to facilitate increased migrative and invasive capabilities, proliferation, as well as resistance to cellular and environmental stresses. Herein, we discuss the cytoskeletal responses to important intracellular stresses (such as mitochondrial, endoplasmic reticulum and oxidative stresses), and delineate the consequences of these responses, including effects on oncogenic signalling. In addition, we elaborate how the cytoskeleton and its associated molecules present themselves as therapeutic targets. The potential and limitations of targeting new classes of cytoskeletal proteins are also explored, in the context of developing novel strategies that impact cancer progression.
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Affiliation(s)
- Mei Shan Ong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (M.S.O.); (S.D.); (C.E.H.)
| | - Shuo Deng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (M.S.O.); (S.D.); (C.E.H.)
| | - Clarissa Esmeralda Halim
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (M.S.O.); (S.D.); (C.E.H.)
| | - Wanpei Cai
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore (T.Z.T.); (R.Y.-J.H.)
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore;
| | - Tuan Zea Tan
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore (T.Z.T.); (R.Y.-J.H.)
| | - Ruby Yun-Ju Huang
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore (T.Z.T.); (R.Y.-J.H.)
- School of Medicine, College of Medicine, National Taiwan University, No. 1 Ren Ai Road Sec. 1, Taipei City 10617, Taiwan
- Department of Obstetrics and Gynaecology, National University Hospital, National University Health System, Singapore 119074, Singapore
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore;
- Medical Science Cluster, Cancer Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
- National University Cancer Institute, National University Health System, Singapore 119074, Singapore
| | - Shing Chuan Hooi
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (M.S.O.); (S.D.); (C.E.H.)
- Medical Science Cluster, Cancer Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
- Correspondence: (S.C.H.); (A.P.K.); (C.T.Y.); Tel.: +65-6516-3294 (S.C.H. & C.T.Y.); +65-6873-5456 (A.P.K.); Fax: +65-6778-8161 (S.C.H. & C.T.Y.); +65-6873-9664 (A.P.K.)
| | - Alan Prem Kumar
- Cancer Science Institute of Singapore, National University of Singapore, Singapore 117599, Singapore (T.Z.T.); (R.Y.-J.H.)
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore;
- Medical Science Cluster, Cancer Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
- National University Cancer Institute, National University Health System, Singapore 119074, Singapore
- Correspondence: (S.C.H.); (A.P.K.); (C.T.Y.); Tel.: +65-6516-3294 (S.C.H. & C.T.Y.); +65-6873-5456 (A.P.K.); Fax: +65-6778-8161 (S.C.H. & C.T.Y.); +65-6873-9664 (A.P.K.)
| | - Celestial T. Yap
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117593, Singapore; (M.S.O.); (S.D.); (C.E.H.)
- Medical Science Cluster, Cancer Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
- National University Cancer Institute, National University Health System, Singapore 119074, Singapore
- Correspondence: (S.C.H.); (A.P.K.); (C.T.Y.); Tel.: +65-6516-3294 (S.C.H. & C.T.Y.); +65-6873-5456 (A.P.K.); Fax: +65-6778-8161 (S.C.H. & C.T.Y.); +65-6873-9664 (A.P.K.)
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19
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Actin stabilizing compounds show specific biological effects due to their binding mode. Sci Rep 2019; 9:9731. [PMID: 31278311 PMCID: PMC6611809 DOI: 10.1038/s41598-019-46282-w] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 06/26/2019] [Indexed: 11/08/2022] Open
Abstract
Actin binding compounds are widely used tools in cell biology. We compare the biological and biochemical effects of miuraenamide A and jasplakinolide, a structurally related prototypic actin stabilizer. Though both compounds have similar effects on cytoskeletal morphology and proliferation, they affect migration and transcription in a distinctive manner, as shown by a transcriptome approach in endothelial cells. In vitro, miuraenamide A acts as an actin nucleating, F-actin polymerizing and stabilizing compound, just like described for jasplakinolide. However, in contrast to jasplakinolide, miuraenamide A competes with cofilin, but not gelsolin or Arp2/3 for binding to F-actin. We propose a binding mode of miuraenamide A, explaining both its similarities and its differences to jasplakinolide. Molecular dynamics simulations suggest that the bromophenol group of miurenamide A interacts with residues Tyr133, Tyr143, and Phe352 of actin. This shifts the D-loop of the neighboring actin, creating tighter packing of the monomers, and occluding the binding site of cofilin. Since relatively small changes in the molecular structure give rise to this selectivity, actin binding compounds surprisingly are promising scaffolds for creating actin binders with specific functionality instead of just "stabilizers".
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Evaluation of Cyclosaplin Efficacy Using a Silk Based 3D Tumor Model. Biomolecules 2019; 9:biom9040123. [PMID: 30925799 PMCID: PMC6523308 DOI: 10.3390/biom9040123] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 12/22/2022] Open
Abstract
Development of novel anti-cancer peptides requires a rapid screening process which can be accelerated by using appropriate in vitro tumor models. Breast carcinoma tissue is a three-dimensional (3D) microenvironment, which contains a hypoxic center surrounded by dense proliferative tissue. Biochemical clues provided by such a 3D cell mass cannot be recapitulated in conventional 2D culture systems. In this experiment, we evaluate the efficacy of the sandalwood peptide, cyclosaplin, on an established in vitro 3D silk breast cancer model using the invasive MDA-MB-231 cell line. The anti-proliferative effect of the peptide on the 3D silk tumor model is monitored by alamarBlue assay, with conventional 2D culture as control. The proliferation rate, glucose consumed, lactate dehydrogenase (LDH), and matrix metalloproteinase 9 (MMP-9) activity of human breast cancer cells are higher in 3D constructs compared to 2D. A higher concentration of drug is required to achieve 50% cell death in 3D culture than in 2D culture. The cyclosaplin treated MDA-MB-231 cells showed a significant decrease in MMP-9 activity in 3D constructs. Microscopic analysis revealed the formation of cell clusters evenly distributed in the scaffolds. The drug treated cells were less in number, smaller and showed unusual morphology. Overall, these findings indicate the role of cyclosaplin as a promising anti-cancer therapeutic.
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Moffitt L, Karimnia N, Stephens A, Bilandzic M. Therapeutic Targeting of Collective Invasion in Ovarian Cancer. Int J Mol Sci 2019; 20:E1466. [PMID: 30909510 PMCID: PMC6471817 DOI: 10.3390/ijms20061466] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 12/31/2022] Open
Abstract
Ovarian cancer is the seventh most commonly diagnosed cancer amongst women and has the highest mortality rate of all gynaecological malignancies. It is a heterogeneous disease attributed to one of three cell types found within the reproductive milieu: epithelial, stromal, and germ cell. Each histotype differs in etiology, pathogenesis, molecular biology, risk factors, and prognosis. Furthermore, the origin of ovarian cancer remains unclear, with ovarian involvement secondary to the contribution of other gynaecological tissues. Despite these complexities, the disease is often treated as a single entity, resulting in minimal improvement to survival rates since the introduction of platinum-based chemotherapy over 30 years ago. Despite concerted research efforts, ovarian cancer remains one of the most difficult cancers to detect and treat, which is in part due to the unique mode of its dissemination. Ovarian cancers tend to invade locally to neighbouring tissues by direct extension from the primary tumour, and passively to pelvic and distal organs within the peritoneal fluid or ascites as multicellular spheroids. Once at their target tissue, ovarian cancers, like most epithelial cancers including colorectal, melanoma, and breast, tend to invade as a cohesive unit in a process termed collective invasion, driven by specialized cells termed "leader cells". Emerging evidence implicates leader cells as essential drivers of collective invasion and metastasis, identifying collective invasion and leader cells as a viable target for the management of metastatic disease. However, the development of targeted therapies specifically against this process and this subset of cells is lacking. Here, we review our understanding of metastasis, collective invasion, and the role of leader cells in ovarian cancer. We will discuss emerging research into the development of novel therapies targeting collective invasion and the leader cell population.
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Affiliation(s)
- Laura Moffitt
- Hudson Institute of Medical Research, Clayton VIC 3168, Australia.
- Department of Molecular and Translational Sciences, Monash University, Clayton VIC 3800, Australia.
| | - Nazanin Karimnia
- Hudson Institute of Medical Research, Clayton VIC 3168, Australia.
- Department of Molecular and Translational Sciences, Monash University, Clayton VIC 3800, Australia.
| | - Andrew Stephens
- Hudson Institute of Medical Research, Clayton VIC 3168, Australia.
- Department of Molecular and Translational Sciences, Monash University, Clayton VIC 3800, Australia.
| | - Maree Bilandzic
- Hudson Institute of Medical Research, Clayton VIC 3168, Australia.
- Department of Molecular and Translational Sciences, Monash University, Clayton VIC 3800, Australia.
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New Acyclic Cytotoxic Jasplakinolide Derivative from the Marine Sponge Jaspis splendens. Mar Drugs 2019; 17:md17020100. [PMID: 30736370 PMCID: PMC6409940 DOI: 10.3390/md17020100] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/01/2019] [Accepted: 02/01/2019] [Indexed: 12/03/2022] Open
Abstract
A new acylic jasplakinolide congener (2), another acyclic derivative requiring revision (4), together with two jasplakinolide derivatives including the parent compound jasplakinolide (1) were isolated from the Indonesian marine sponge Jaspis splendens. The chemical structures of the new and known compounds were unambiguously elucidated based on HRESIMS and exhaustive 1D and 2D NMR spectral analysis as well as a comparison of their NMR data with those of jasplakinolide (1). The isolated jasplakinolides inhibited the growth of mouse lymphoma (L5178Y) cells in vitro with IC50 values in the low micromolar to nanomolar range.
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Kappler S, Karmann L, Prudel C, Herrmann J, Caddeu G, Müller R, Vollmar AM, Zahler S, Kazmaier U. Synthesis and Biological Evaluation of Modified Miuraenamides. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801391] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sarah Kappler
- Organic Chemistry; Saarland University; Campus C4.2 66123 Saarbrücken Germany
| | - Lisa Karmann
- Organic Chemistry; Saarland University; Campus C4.2 66123 Saarbrücken Germany
| | - Cynthia Prudel
- Organic Chemistry; Saarland University; Campus C4.2 66123 Saarbrücken Germany
| | - Jennifer Herrmann
- Department Microbial Natural Products; Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS); Saarland University; Campus E8.1 66123 Saarbrücken Germany
| | - Giulia Caddeu
- Department of Pharmacy, Pharmaceutical Biology; Ludwig-Maximilians-University Munich); Butenandtstr. 5-13 81377 München Germany
| | - Rolf Müller
- Department Microbial Natural Products; Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS); Saarland University; Campus E8.1 66123 Saarbrücken Germany
| | - Angelika M. Vollmar
- Department of Pharmacy, Pharmaceutical Biology; Ludwig-Maximilians-University Munich); Butenandtstr. 5-13 81377 München Germany
| | - Stefan Zahler
- Department of Pharmacy, Pharmaceutical Biology; Ludwig-Maximilians-University Munich); Butenandtstr. 5-13 81377 München Germany
| | - Uli Kazmaier
- Organic Chemistry; Saarland University; Campus C4.2 66123 Saarbrücken Germany
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Uria AR, Piel J, Wakimoto T. Biosynthetic Insights of Calyculin- and Misakinolide-Type Compounds in "Candidatus Entotheonella sp.". Methods Enzymol 2018; 604:287-330. [PMID: 29779656 DOI: 10.1016/bs.mie.2018.02.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
Microbial symbionts are recognized as the important sources of numerous sponge-derived metabolites with potent biological activities. The limitation to cultivate the majority of potential symbionts has hampered attempts to explore and exploit their natural products for further development toward medical applications. Metagenomics-guided approaches have enabled cloning of natural product biosynthesis genes from uncultured microbial symbionts. Subsequent activation of biosynthesis genes in easily culturable bacteria could lead to the sustainable production of rare sponge-derived compounds. In this chapter, we highlight metagenomic strategies to reveal natural product biosynthetic pathways in sponge metagenomes based on the calyculin and misakinolide polyketides. Techniques to identify the compound producer are briefly discussed. We further describe examples of functional studies of the biosynthetic pathways of these two compound types with a special emphasis on the general experimental protocols for the activity assays of key proteins involved in their biosynthesis.
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Affiliation(s)
- Agustinus R Uria
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.
| | - Jörn Piel
- Institute of Microbiology, Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland.
| | - Toshiyuki Wakimoto
- Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.
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Polyisoprenylated cysteinyl amide inhibitors disrupt actin cytoskeleton organization, induce cell rounding and block migration of non-small cell lung cancer. Oncotarget 2018; 8:31726-31744. [PMID: 28423648 PMCID: PMC5458243 DOI: 10.18632/oncotarget.15956] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 02/15/2017] [Indexed: 12/18/2022] Open
Abstract
The malignant potential of Non-Small Cell Lung Cancer (NSCLC) is dependent on cellular processes that promote metastasis. F-actin organization is central to cell migration, invasion, adhesion and angiogenesis, processes involved in metastasis. F-actin remodeling is enhanced by the overexpression and/or hyper-activation of some members of the Rho family of small GTPases. Therefore, agents that mitigate hyperactive Rho proteins may be relevant for controlling metastasis. We previously reported the role of polyisoprenylated cysteinyl amide inhibitors (PCAIs) as potential inhibitors of cancers with hyperactive small GTPases. In this report, we investigate the potential role of PCAIs against NSCLC cells and show that as low as 0.5 μM PCAIs significantly inhibit 2D and 3D NCI-H1299 cell migration by 48% and 45%, respectively. PCAIs at 1 μM inhibited 2D and 3D NCI-H1299 cell invasion through Matrigel by 50% and 85%, respectively. Additionally, exposure to 5 μM of the PCAIs for 24 h caused at least a 66% drop in the levels of Rac1, Cdc42, and RhoA and a 38% drop in F-actin intensity at the cell membrane. This drop in F-actin was accompanied by a 73% reduction in the number of filopodia per cell. Interestingly, the polyisoprenyl group of the PCAIs is essential for these effects, as NSL-100, a non-farnesylated analog, does not elicit similar effects on F-actin assembly and organization. Our findings indicate that PCAIs disrupt F-actin assembly and organization to suppress cell motility and invasion. The PCAIs may be an effective therapy option for NSCLC metastasis and invasion control.
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Hagiyama M, Yabuta N, Okuzaki D, Inoue T, Takashima Y, Kimura R, Ri A, Ito A. Modest Static Pressure Suppresses Columnar Epithelial Cell Growth in Association with Cell Shape and Cytoskeletal Modifications. Front Physiol 2017; 8:997. [PMID: 29259558 PMCID: PMC5723396 DOI: 10.3389/fphys.2017.00997] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/20/2017] [Indexed: 01/15/2023] Open
Abstract
Intraluminal pressure elevation can cause degenerative disorders, such as ileus and hydronephrosis, and the threshold is fairly low and constant, 20–30 cm H2O. We previously devised a novel two-chamber culture system subjecting cells cultured on a semipermeable membrane to increased culture medium height (water pressure up to 60 cm H2O). Here, we sought to determine how a continuous pressure load of ~30 cm H2O affects proliferating epithelial cells with special interest in the link with cell morphology. We cultured several different cell lines using the low static pressure-loadable two-chamber system, and examined cell growth, cell cycle, and cell morphology. Madin–Darby canine kidney (MDCK) columnar epithelial cells were growth-suppressed in a manner dependent on static water pressure ranging from 2 to 50 cm H2O, without cell cycle arrest at any specific phase. Two other types of columnar epithelial cells exhibited similar phenotypes. By contrast, spherical epithelial and mesenchymal cells were not growth-suppressed, even at 50 cm H2O. Phalloidin staining revealed that 50 cm H2O pressure load vertically flattened and laterally widened columnar epithelial cells and made actin fiber distribution sparse, without affecting total phalloidin intensity per cell. When the mucosal protectant irsogladine maleate (100 nM) was added to 50-cm-high culture medium, MDCK cells were reduced in volume and their doubling time shortened. Cell proliferation and morphology are known to be regulated by the Hippo signaling pathway. A pressure load of 50 cm H2O enhanced serine-127 phosphorylation and cytoplasmic retention of YAP, the major constituent of this pathway, suggesting that Hippo pathway was involved in the pressure-induced cell growth suppression. RNA sequencing of MDCK cells showed that a 50 cm H2O pressure load upregulated keratin 14, an intermediate filament, 12-fold. This upregulation was confirmed at the protein level by immunofluorescence, suggesting a role in cytoskeletal reinforcement. These results provide evidence that cell morphology and the cytoskeleton are closely linked to cell growth. Pathological intraluminal pressure elevation may cause mucosal degeneration by acting directly on this linkage and the Hippo pathway.
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Affiliation(s)
- Man Hagiyama
- Department of Pathology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan
| | - Norikazu Yabuta
- Department of Oncogene Research, Osaka University, Suita, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Takao Inoue
- Department of Pathology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan
| | - Yasutoshi Takashima
- Department of Pathology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan
| | - Ryuichiro Kimura
- Department of Pathology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan
| | - Aritoshi Ri
- Department of Pathology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan
| | - Akihiko Ito
- Department of Pathology, Faculty of Medicine, Kindai University, Osaka-Sayama, Japan
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Golfier S, Rosendahl P, Mietke A, Herbig M, Guck J, Otto O. High-throughput cell mechanical phenotyping for label-free titration assays of cytoskeletal modifications. Cytoskeleton (Hoboken) 2017; 74:283-296. [PMID: 28445605 PMCID: PMC5601209 DOI: 10.1002/cm.21369] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 04/12/2017] [Accepted: 04/20/2017] [Indexed: 01/29/2023]
Abstract
The mechanical fingerprint of cells is inherently linked to the structure of the cytoskeleton and can serve as a label‐free marker for cell homeostasis or pathologic states. How cytoskeletal composition affects the physical response of cells to external loads has been intensively studied with a spectrum of techniques, yet quantitative and statistically powerful investigations in the form of titration assays are hampered by the low throughput of most available methods. In this study, we employ real‐time deformability cytometry (RT‐DC), a novel microfluidic tool to examine the effects of biochemically modified F‐actin and microtubule stability and nuclear chromatin structure on cell deformation in a human leukemia cell line (HL60). The high throughput of our method facilitates extensive titration assays that allow for significance assessment of the observed effects and extraction of half‐maximal concentrations for most of the applied reagents. We quantitatively show that integrity of the F‐actin cortex and microtubule network dominate cell deformation on millisecond timescales probed with RT‐DC. Drug‐induced alterations in the nuclear chromatin structure were not found to consistently affect cell deformation. The sensitivity of the high‐throughput cell mechanical measurements to the cytoskeletal modifications we present in this study opens up new possibilities for label‐free dose‐response assays of cytoskeletal modifications.
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Affiliation(s)
- Stefan Golfier
- Biotechnology Center, Technische Universität Dresden, Dresden, Germany.,Max-Planck-Institute of Molecular Cell Biology and Genetics, Dresden, Germany.,Max-Planck-Institute for Physics of Complex Systems, Dresden, Germany
| | - Philipp Rosendahl
- Biotechnology Center, Technische Universität Dresden, Dresden, Germany
| | - Alexander Mietke
- Max-Planck-Institute of Molecular Cell Biology and Genetics, Dresden, Germany.,Max-Planck-Institute for Physics of Complex Systems, Dresden, Germany
| | - Maik Herbig
- Biotechnology Center, Technische Universität Dresden, Dresden, Germany
| | - Jochen Guck
- Biotechnology Center, Technische Universität Dresden, Dresden, Germany
| | - Oliver Otto
- Biotechnology Center, Technische Universität Dresden, Dresden, Germany.,ZIK HIKE, Universität Greifswald, Greifswald, Germany
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Ayala YA, Pontes B, Hissa B, Monteiro ACM, Farina M, Moura-Neto V, Viana NB, Nussenzveig HM. Effects of cytoskeletal drugs on actin cortex elasticity. Exp Cell Res 2017; 351:173-181. [DOI: 10.1016/j.yexcr.2016.12.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/30/2016] [Accepted: 12/22/2016] [Indexed: 12/27/2022]
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Infectious Bursal Disease Virus Activates c-Src To Promote α4β1 Integrin-Dependent Viral Entry by Modulating the Downstream Akt-RhoA GTPase-Actin Rearrangement Cascade. J Virol 2017; 91:JVI.01891-16. [PMID: 27881656 DOI: 10.1128/jvi.01891-16] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 11/21/2016] [Indexed: 12/21/2022] Open
Abstract
While the entry of infectious bursal disease virus (IBDV) is initiated by the binding of the virus to the two major receptors integrin and HSP90, the signaling events after receptor binding and how they contribute to virus entry remain elusive. We show here that IBDV activates c-Src by inducing the phosphorylation of the Y416 residue in c-Src both in DF-1 chicken fibroblasts and in vivo in the bursa of Fabricius from specific-pathogen-free (SPF) chickens. Importantly, inactivated IBDV fails to stimulate c-Src Y416 phosphorylation, and a very virulent IBDV strain induces a much higher level of c-Src Y416 phosphorylation than does an attenuated strain. Inhibition of c-Src activation by an Src kinase inhibitor or expression of a c-Src dominant negative mutant results in a significant decrease in the internalization of IBDV but has little effect on virus adhesion. Furthermore, short hairpin RNA (shRNA) downregulation of integrin, either the α4 or β1 subunit, but not HSP90 remarkably attenuates IBDV-induced c-Src Y416 phosphorylation, resulting in a decrease in IBDV internalization but not virus adhesion. Moreover, interestingly, inhibition of either c-Src downstream of the phosphatidylinositol 3-kinase (PI3K)/Akt-RhoA signaling cascade or actin rearrangement leads to a significant decrease in IBDV internalization irrespective of the IBDV-induced high levels of c-Src phosphorylation. Cumulatively, our results suggest a novel feed-forward model whereby IBDV activates c-Src for benefiting its cell entry via an integrin-mediated pathway by the activation of downstream PI3K/Akt-RhoA signaling and cytoskeleton actin rearrangement. IMPORTANCE While IBDV-caused immunosuppression is highly related to viral invasion, the molecular basis of the cellular entry of IBDV remains elusive. In this study, we demonstrate that IBDV activates c-Src by inducing the phosphorylation of the Y416 residue in c-Src to promote virus internalization but not virus adhesion. The ability to induce the level of c-Src Y416 phosphorylation correlates with the pathogenicity of an IBDV strain. IBDV-induced c-Src Y416 activation is α4β1 integrin but not HSP90 dependent and involves the activation of the downstream PI3K/Akt-RhoA GTPase-actin rearrangement cascade. Thus, our findings provide new insights into the IBDV infection process and the potential for c-Src as a candidate target for the development of IBDV therapeutic drugs.
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Dasari B, Fufa T, Aeluri M, Gaddam J, Deora GS, Gaunitz F, Kitambi SS, Arya P. Macrocyclic Toolbox from Epothilone Fragment Identifies a Compound Showing Molecular Interactions with Actin and Novel Promoters of Apoptosis in Patient-derived Brain Tumor Cells. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bhanudas Dasari
- Dr. Reddy's Institute of Life Sciences (DRILS); University of Hyderabad, Campus; Hyderabad 500046 India
- Sai Advantium Pharma Ltd.; IKP Road Turkapally; Hyderabad 500078 India
| | - Temesgen Fufa
- Klinik und Poliklinik für Neurochirurgie; Universitätsklinikum Leipzig; Leipzig Germany
- Department of Microbiology and Tumor and Cell Biology; Karolinska Institutet; 17177 Stockholm Sweden
| | - Madhu Aeluri
- Dr. Reddy's Institute of Life Sciences (DRILS); University of Hyderabad, Campus; Hyderabad 500046 India
- GVK Biosciences, Nacharam; IDA Mallapur; Hyderabad 500076 India
| | - Jagan Gaddam
- Dr. Reddy's Institute of Life Sciences (DRILS); University of Hyderabad, Campus; Hyderabad 500046 India
| | - Girdhar Singh Deora
- School of Pharmacy; The University of Queensland; Brisbane QLD 4072 Australia
| | - Frank Gaunitz
- Klinik und Poliklinik für Neurochirurgie; Universitätsklinikum Leipzig; Leipzig Germany
| | - Satish Srinivas Kitambi
- Department of Microbiology and Tumor and Cell Biology; Karolinska Institutet; 17177 Stockholm Sweden
| | - Prabhat Arya
- Dr. Reddy's Institute of Life Sciences (DRILS); University of Hyderabad, Campus; Hyderabad 500046 India
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Actin-Dynamics in Plant Cells: The Function of Actin-Perturbing Substances: Jasplakinolide, Chondramides, Phalloidin, Cytochalasins, and Latrunculins. Methods Mol Biol 2016; 1365:243-61. [PMID: 26498789 DOI: 10.1007/978-1-4939-3124-8_13] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This chapter gives an overview of the most common F-actin-perturbing substances that are used to study actin dynamics in living plant cells in studies on morphogenesis, motility, organelle movement, or when apoptosis has to be induced. These substances can be divided into two major subclasses: F-actin-stabilizing and -polymerizing substances like jasplakinolide and chondramides and F-actin-severing compounds like chytochalasins and latrunculins. Jasplakinolide was originally isolated form a marine sponge, and can now be synthesized and has become commercially available, which is responsible for its wide distribution as membrane-permeable F-actin-stabilizing and -polymerizing agent, which may even have anticancer activities. Cytochalasins, derived from fungi, show an F-actin-severing function and many derivatives are commercially available (A, B, C, D, E, H, J), also making it a widely used compound for F-actin disruption. The same can be stated for latrunculins (A, B), derived from red sea sponges; however the mode of action is different by binding to G-actin and inhibiting incorporation into the filament. In the case of swinholide a stable complex with actin dimers is formed resulting also in severing of F-actin. For influencing F-actin dynamics in plant cells only membrane permeable drugs are useful in a broad range. We however introduce also the phallotoxins and synthetic derivatives, as they are widely used to visualize F-actin in fixed cells. A particular uptake mechanism has been shown for hepatocytes, but has also been described in siphonal giant algae. In the present chapter the focus is set on F-actin dynamics in plant cells where alterations in cytoplasmic streaming can be particularly well studied; however methods by fluorescence applications including phalloidin and antibody staining as well as immunofluorescence-localization of the inhibitor drugs are given.
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Kopecká M. Microtubules and Actin Cytoskeleton of Cryptococcus neoformans as Targets for Anticancer Agents to Potentiate a Novel Approach for New Antifungals. Chemotherapy 2015; 61:117-21. [PMID: 26650399 DOI: 10.1159/000437134] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 06/23/2015] [Indexed: 11/19/2022]
Abstract
BACKGROUND We investigated the targeting of microtubules (MT) and F-actin cytoskeleton (AC) of the human pathogenic yeast Cryptococcus neoformans with agents for cancer therapy, in order to examine whether this yeast cytoskeleton could become a new antifungal target for the inhibition of cell division. METHODS Cells treated with 10 cytoskeleton inhibitors in yeast extract peptone dextrose medium were investigated by phase-contrast and fluorescence microscopy, and growth inhibition was estimated by cell counts using a Bürker chamber and measuring absorbance for 6 days. RESULTS Docetaxel, paclitaxel, vinblastine sulfate salt, cytochalasin D and chlorpropham [isopropyl N-(3-chlorophenyl) carbamate] did not inhibit proliferation. The MT inhibitors methyl benzimidazole-2-ylcarbamate (BCM), nocodazole, thiabendazole (TBZ) and vincristine (VINC) disrupted MT and inhibited mitoses, but anucleated buds emerged on cells that increased in size, vacuolated and seemed to die after 2 days. The response of the cells to the presence of the actin inhibitor latrunculin A (LA) included the disappearance of actin patches, actin cables and actin rings; this arrested budding and cell division. However, in 3-4 days, resistant budding cells appeared in all 5 inhibitors. Disruption of the MT and AC and inhibition of cell division and budding persisted only when the MT and AC inhibitors were combined, i.e. VINC + LA, BCM + LA or TBZ + LA. CONCLUSION The MT and AC of C. neoformans are new antifungal targets for the persistent inhibition of cell division by combined F-actin and MT inhibitors.
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Affiliation(s)
- Marie Kopecká
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
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Aida N, Ushikubo T, Kobayashi F, Sako R, Suehara M, Furusawa M, Muramatsu T. Actin stabilization induces apoptosis in cultured porcine epithelial cell rests of Malassez. Int Endod J 2015; 49:663-9. [PMID: 26118334 DOI: 10.1111/iej.12494] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 06/23/2015] [Indexed: 11/29/2022]
Abstract
AIM To test whether actin stabilization by jasplakinolide induces inhibition of cell viability and apoptosis in epithelial cell rests of Malassez (ERM). METHODOLOGY ERM derived from porcine were spread in a 96-well dish (5 × 10(4) /well) using Dulbecco's modified Eagle's medium. The actin-specific stabilization reagent, jasplakinolide, was incorporated into the culture medium and incubated for 24 h. To evaluate cell viability, the WST-1 assay was carried out and absorption (450 nm) was measured. To detect apoptotic cells, monoclonal antibody to single-strand DNA (ssDNA) was used and absorption (405 nm) was measured. Actin stabilization and apoptosis induced by jasplakinolide were morphologically investigated by staining with Alexa Fluor 568 phalloidin and observed under a fluorescent microscope. As a negative control, DMSO was used instead of jasplakinolide. Differences between the jasplakinolide-treated group and the control group were analysed statistically using the Student's t-test. RESULTS Cell viability decreased in a concentration-dependent manner, and cell viability in the jasplakinolide-treated ERM was lower than that in nontreated ERM (n = 16, P < 0.01). Apoptotic cells in the jasplakinolide-treated ERM were more frequently detected compared to that in nontreated ERM (n = 16, P < 0.01). Morphologically, shrinkage, irregular forms and fragmentation of nuclei suggesting apoptotic bodies were observed in jasplakinolide-treated ERM, whilst actin filaments were extended in non-treated ERM. CONCLUSION Actin stabilization by jasplakinolide inhibited cell viability and induced apoptosis in epithelial cell rests of Malassez.
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Affiliation(s)
- N Aida
- Department of Endodontics and Clinical Cariology, Tokyo Dental College, Tokyo, Japan
| | - T Ushikubo
- Department of Endodontics and Clinical Cariology, Tokyo Dental College, Tokyo, Japan
| | - F Kobayashi
- Department of Endodontics and Clinical Cariology, Tokyo Dental College, Tokyo, Japan
| | - R Sako
- Department of Endodontics and Clinical Cariology, Tokyo Dental College, Tokyo, Japan
| | - M Suehara
- Department of Endodontics and Clinical Cariology, Tokyo Dental College, Tokyo, Japan
| | - M Furusawa
- Department of Endodontics and Clinical Cariology, Tokyo Dental College, Tokyo, Japan
| | - T Muramatsu
- Department of Endodontics and Clinical Cariology, Tokyo Dental College, Tokyo, Japan
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Di Venosa G, Perotti C, Batlle A, Casas A. The role of cytoskeleton and adhesion proteins in the resistance to photodynamic therapy. Possible therapeutic interventions. Photochem Photobiol Sci 2015; 14:1451-64. [PMID: 25832889 DOI: 10.1039/c4pp00445k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
It is known that Photodynamic Therapy (PDT) induces changes in the cytoskeleton, the cell shape, and the adhesion properties of tumour cells. In addition, these targets have also been demonstrated to be involved in the development of PDT resistance. The reversal of PDT resistance by manipulating the cell adhesion process to substrata has been out of reach. Even though the existence of cell adhesion-mediated PDT resistance has not been reported so far, it cannot be ruled out. In addition to its impact on the apoptotic response to photodamage, the cytoskeleton alterations are thought to be associated with the processes of metastasis and invasion after PDT. In this review, we will address the impact of photodamage on the microfilament and microtubule cytoskeleton components and its regulators on PDT-treated cells as well as on cell adhesion. We will also summarise the impact of PDT on the surviving and resistant cells and their metastatic potential. Possible strategies aimed at taking advantage of the changes induced by PDT on actin, tubulin and cell adhesion proteins by targeting these molecules will also be discussed.
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Affiliation(s)
- Gabriela Di Venosa
- Centro de Investigaciones sobre Porfirinas y Porfirias (CIPYP). CONICET and Hospital de Clínicas José de San Martín, University of Buenos Aires, Córdoba 2351 1er subsuelo, Ciudad Autónoma de Buenos Aires, CP1120AAF, Argentina.
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Arndt HD, Rizzo S, Nöcker C, Wakchaure VN, Milroy LG, Bieker V, Calderon A, Tran TTN, Brand S, Dehmelt L, Waldmann H. Divergent solid-phase synthesis of natural product-inspired bipartite cyclodepsipeptides: total synthesis of seragamide A. Chemistry 2015; 21:5311-6. [PMID: 25694199 DOI: 10.1002/chem.201500368] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Indexed: 11/06/2022]
Abstract
Macrocyclic natural products (NPs) and analogues thereof often show high affinity, selectivity, and metabolic stability, and methods for the synthesis of NP-like macrocycle collections are of major current interest. We report an efficient solid-phase/cyclorelease method for the synthesis of a collection of macrocyclic depsipeptides with bipartite peptide/polyketide structure inspired by the very potent F-actin stabilizing depsipeptides of the jasplakinolide/geodiamolide class. The method includes the assembly of an acyclic precursor chain on a polymeric carrier, terminated by olefins that constitute complementary fragments of the polyketide section and cyclization by means of a relay-ring-closing metathesis (RRCM). The method was validated in the first total synthesis of the actin-stabilizing cyclodepsipeptide seragamide A and the synthesis of a collection of structurally diverse bipartite depsipeptides.
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Affiliation(s)
- Hans-Dieter Arndt
- Max-Planck-Institute of Molecular Physiology, Otto-Hahn-Strasse 11, 44227 Dortmund (Germany), Fax: (+49) 3641948212; Friedrich-Schiller-Universität, Institute of Organic and Macromolecular Chemistry, Humboldtstrasse 10, 07743 Jena (Germany).
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36
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Cheng Y, Feng Y, Jansson L, Sato Y, Deguchi M, Kawamura K, Hsueh AJ. Actin polymerization-enhancing drugs promote ovarian follicle growth mediated by the Hippo signaling effector YAP. FASEB J 2015; 29:2423-30. [PMID: 25690654 DOI: 10.1096/fj.14-267856] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Accepted: 01/27/2015] [Indexed: 11/11/2022]
Abstract
Hippo signaling pathway consists of conserved serine/threonine kinases to maintain optimal organ sizes. Studies have demonstrated that fragmentation of murine ovaries increases actin polymerization and disrupts Hippo signaling, leading to nuclear translocation of Hippo signaling effector Yes-associated protein (YAP) in ovarian follicles and follicle growth. For patients with polycystic ovarian syndrome showing follicle arrest, ovarian wedge resection and laser drilling promote follicle growth. Because these damaging procedures likely involve actin polymerization, we tested whether actin polymerization-promoting drugs could promote YAP translocation and stimulate follicle growth. Treatment of murine ovaries with μM Jasplakinolide (JASP), an actin polymerization-promoting cyclic peptide, or sphingosine-1-phosphate (S1P), a follicular fluid constituent known to promote actin polymerization, increased the conversion of globular actin to the filamentous form, followed by increased nuclear YAP and expression of downstream connective tissue growth factor (CCN2). After short-term treatments with JASP or S1P, in vitro cultured and in vivo grafted ovaries showed follicle growth. Furthermore, induction of constitutively active YAP in ovarian grafts of transgenic mice enhanced follicle development, whereas treatment of human ovarian cortices with JASP or S1P increased CCN2 expression. Thus, JASP and S1P stimulate follicle growth and are potential therapeutic agents for treating polycystic ovarian syndrome and other ovarian disorders.
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Affiliation(s)
- Yuan Cheng
- *Department of Obstetrics and Gynecology and Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA; Department of Obstetrics and Gynecology, St. Mariana University, Kawasaki, Japan; and Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Yi Feng
- *Department of Obstetrics and Gynecology and Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA; Department of Obstetrics and Gynecology, St. Mariana University, Kawasaki, Japan; and Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Lina Jansson
- *Department of Obstetrics and Gynecology and Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA; Department of Obstetrics and Gynecology, St. Mariana University, Kawasaki, Japan; and Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Yorino Sato
- *Department of Obstetrics and Gynecology and Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA; Department of Obstetrics and Gynecology, St. Mariana University, Kawasaki, Japan; and Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Masashi Deguchi
- *Department of Obstetrics and Gynecology and Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA; Department of Obstetrics and Gynecology, St. Mariana University, Kawasaki, Japan; and Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Kazuhiro Kawamura
- *Department of Obstetrics and Gynecology and Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA; Department of Obstetrics and Gynecology, St. Mariana University, Kawasaki, Japan; and Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
| | - Aaron J Hsueh
- *Department of Obstetrics and Gynecology and Department of Otolaryngology, Stanford University School of Medicine, Stanford, California, USA; Department of Obstetrics and Gynecology, St. Mariana University, Kawasaki, Japan; and Department of Obstetrics and Gynecology, Akita University Graduate School of Medicine, Akita, Japan
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Diamond MI, Cai S, Boudreau A, Carey CJ, Lyle N, Pappu RV, Swamidass SJ, Bissell M, Piwnica-Worms H, Shao J. Subcellular localization and Ser-137 phosphorylation regulate tumor-suppressive activity of profilin-1. J Biol Chem 2015; 290:9075-86. [PMID: 25681442 DOI: 10.1074/jbc.m114.619874] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Indexed: 12/18/2022] Open
Abstract
The actin-binding protein profilin-1 (Pfn1) inhibits tumor growth and yet is also required for cell proliferation and survival, an apparent paradox. We previously identified Ser-137 of Pfn1 as a phosphorylation site within the poly-l-proline (PLP) binding pocket. Here we confirm that Ser-137 phosphorylation disrupts Pfn1 binding to its PLP-containing ligands with little effect on actin binding. We find in mouse xenografts of breast cancer cells that mimicking Ser-137 phosphorylation abolishes cell cycle arrest and apoptotic sensitization by Pfn1 and confers a growth advantage to tumors. This indicates a previously unrecognized role of PLP binding in Pfn1 antitumor effects. Spatial restriction of Pfn1 to the nucleus or cytoplasm indicates that inhibition of tumor cell growth by Pfn1 requires its nuclear localization, and this activity is abolished by a phosphomimetic mutation on Ser-137. In contrast, cytoplasmic Pfn1 lacks inhibitory effects on tumor cell growth but rescues morphological and proliferative defects of PFN1 null mouse chondrocytes. These results help reconcile seemingly opposed cellular effects of Pfn1, provide new insights into the antitumor mechanism of Pfn1, and implicate Ser-137 phosphorylation as a potential therapeutic target for breast cancer.
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Affiliation(s)
- Marc I Diamond
- From the Center for Alzheimer's and Neurodegenerative Diseases, University of Texas, Southwestern Medical Center, Dallas, Texas 75390
| | - Shirong Cai
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110, Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77230
| | - Aaron Boudreau
- Department of Laboratory Medicine, Helen Diller Family Comprehensive Cancer Center, University of California, San Francisco, California 94143
| | - Clifton J Carey
- Division of Laboratory and Genomic Medicine, Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Nicholas Lyle
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130
| | - Rohit V Pappu
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130
| | - S Joshua Swamidass
- Division of Laboratory and Genomic Medicine, Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri 63110
| | - Mina Bissell
- Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, and
| | - Helen Piwnica-Worms
- Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110, Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77230
| | - Jieya Shao
- Breast Oncology Program, Division of Oncology, Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri 63110
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Desouza M, Gunning PW, Stehn JR. The actin cytoskeleton as a sensor and mediator of apoptosis. BIOARCHITECTURE 2014; 2:75-87. [PMID: 22880146 PMCID: PMC3414384 DOI: 10.4161/bioa.20975] [Citation(s) in RCA: 173] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Apoptosis is an important biological process required for the removal of unwanted or damaged cells. Mounting evidence implicates the actin cytoskeleton as both a sensor and mediator of apoptosis. Studies also suggest that actin binding proteins (ABPs) significantly contribute to apoptosis and that actin dynamics play a key role in regulating apoptosis signaling. Changes in the organization of the actin cytoskeleton has been attributed to the process of malignant transformation and it is hypothesized that remodeling of the actin cytoskeleton may enable tumor cells to evade normal apoptotic signaling. This review aims to illuminate the role of the actin cytoskeleton in apoptosis by systematically analyzing how actin and ABPs regulate different apoptosis pathways and to also highlight the potential for developing novel compounds that target tumor-specific actin filaments.
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Affiliation(s)
- Melissa Desouza
- Oncology Research Unit; School of Medical Sciences; The University of New South Wales; Sydney, Australia
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39
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Trendowski M. Exploiting the cytoskeletal filaments of neoplastic cells to potentiate a novel therapeutic approach. Biochim Biophys Acta Rev Cancer 2014; 1846:599-616. [PMID: 25286320 DOI: 10.1016/j.bbcan.2014.09.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 09/19/2014] [Accepted: 09/21/2014] [Indexed: 02/06/2023]
Abstract
Although cytoskeletal-directed agents have been a mainstay in chemotherapeutic protocols due to their ability to readily interfere with the rapid mitotic progression of neoplastic cells, they are all microtubule-based drugs, and there has yet to be any microfilament- or intermediate filament-directed agents approved for clinical use. There are many inherent differences between the cytoskeletal networks of malignant and normal cells, providing an ideal target to attain preferential damage. Further, numerous microfilament-directed agents, and an intermediate filament-directed agent of particular interest (withaferin A) have demonstrated in vitro and in vivo efficacy, suggesting that cytoskeletal filaments may be exploited to supplement chemotherapeutic approaches currently used in the clinical setting. Therefore, this review is intended to expose academics and clinicians to the tremendous variety of cytoskeletal filament-directed agents that are currently available for further chemotherapeutic evaluation. The mechanisms by which microfilament directed- and intermediate filament-directed agents damage malignant cells are discussed in detail in order to establish how the drugs can be used in combination with each other, or with currently approved chemotherapeutic agents to generate a substantial synergistic attack, potentially establishing a new paradigm of chemotherapeutic agents.
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Affiliation(s)
- Matthew Trendowski
- Department of Biology, Syracuse University, 107 College Place, Syracuse, NY 13244, USA.
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Natarajan P, Crothers JM, Rosen JE, Nakada SL, Rakholia M, Okamoto CT, Forte JG, Machen TE. Myosin IIB and F-actin control apical vacuolar morphology and histamine-induced trafficking of H-K-ATPase-containing tubulovesicles in gastric parietal cells. Am J Physiol Gastrointest Liver Physiol 2014; 306:G699-710. [PMID: 24578340 PMCID: PMC3989701 DOI: 10.1152/ajpgi.00316.2013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Selective inhibitors of myosin or actin function and confocal microscopy were used to test the role of an actomyosin complex in controlling morphology, trafficking, and fusion of tubulovesicles (TV) containing H-K-ATPase with the apical secretory canaliculus (ASC) of primary-cultured rabbit gastric parietal cells. In resting cells, myosin IIB and IIC, ezrin, and F-actin were associated with ASC, whereas H-K-ATPase localized to intracellular TV. Histamine caused fusion of TV with ASC and subsequent expansion resulting from HCl and water secretion; F-actin and ezrin remained associated with ASC whereas myosin IIB and IIC appeared to dissociate from ASC and relocalize to the cytoplasm. ML-7 (inhibits myosin light chain kinase) caused ASC of resting cells to collapse and most myosin IIB, F-actin, and ezrin to dissociate from ASC. TV were unaffected by ML-7. Jasplakinolide (stabilizes F-actin) caused ASC to develop large blebs to which actin, myosin II, and ezrin, as well as tubulin, were prominently localized. When added prior to stimulation, ML-7 and jasplakinolide prevented normal histamine-stimulated transformations of ASC/TV and the cytoskeleton, but they did not affect cells that had been previously stimulated with histamine. These results indicate that dynamic pools of actomyosin are required for maintenance of ASC structure in resting cells and for trafficking of TV to ASC during histamine stimulation. However, the dynamic pools of actomyosin are not required once the histamine-stimulated transformation of TV/ASC and cytoskeleton has occurred. These results also show that vesicle trafficking in parietal cells shares mechanisms with similar processes in renal collecting duct cells, neuronal synapses, and skeletal muscle.
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Affiliation(s)
- Paramasivam Natarajan
- 1Department of Molecular and Cell Biology, University of California, Berkeley, California; and
| | - James M. Crothers
- 1Department of Molecular and Cell Biology, University of California, Berkeley, California; and
| | - Jared E. Rosen
- 1Department of Molecular and Cell Biology, University of California, Berkeley, California; and
| | - Stephanie L. Nakada
- 1Department of Molecular and Cell Biology, University of California, Berkeley, California; and
| | - Milap Rakholia
- 1Department of Molecular and Cell Biology, University of California, Berkeley, California; and
| | - Curtis T. Okamoto
- 2Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, California
| | - John G. Forte
- 1Department of Molecular and Cell Biology, University of California, Berkeley, California; and
| | - Terry E. Machen
- 1Department of Molecular and Cell Biology, University of California, Berkeley, California; and
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Still PC, Johnson TA, Theodore CM, Loveridge ST, Crews P. Scrutinizing the scaffolds of marine biosynthetics from different source organisms: Gram-negative cultured bacterial products enter center stage. JOURNAL OF NATURAL PRODUCTS 2014; 77:690-702. [PMID: 24571234 PMCID: PMC4095796 DOI: 10.1021/np500041x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Compounds from macro marine organisms are presumed to owe their biosynthetic origins to associated microbial symbionts, although few definitive examples exist. An upsurge in the recent literature from 2012 to 2013 has shown that four compounds previously reported from macro marine organisms are in fact biosynthesized by non-photosynthetic Gram-negative bacteria (NPGNB). Structural parallels between compounds isolated from macro marine organisms and NPGNB producers form the basis of this review. Although less attention has been given to investigating the chemistry of NPGNB sources, there exists a significant list of structural parallels between NPGNB and macro marine organism-derived compounds. Alternatively, of the thousands of compounds isolated from Gram-positive actinomycetes, few structural parallels with macro marine organisms are known. A summary of small molecules isolated from marine NPGNB sources is presented, including compounds isolated from marine myxobacteria. From this assemblage of structural parallels and diverse chemical structures, it is hypothesized that the potential for the discovery of inspirational molecules from NPGNB sources is vast and that the recent spike in the literature of macro marine compounds owing their biosynthetic origin to NPGNB producers represents a turning point in the field.
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Affiliation(s)
- Patrick C. Still
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Tyler A. Johnson
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Christine M. Theodore
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Steven T. Loveridge
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
| | - Phillip Crews
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, California 95060, United States
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Stehn JR, Haass NK, Bonello T, Desouza M, Kottyan G, Treutlein H, Zeng J, Nascimento PRBB, Sequeira VB, Butler TL, Allanson M, Fath T, Hill TA, McCluskey A, Schevzov G, Palmer SJ, Hardeman EC, Winlaw D, Reeve VE, Dixon I, Weninger W, Cripe TP, Gunning PW. A novel class of anticancer compounds targets the actin cytoskeleton in tumor cells. Cancer Res 2014; 73:5169-82. [PMID: 23946473 DOI: 10.1158/0008-5472.can-12-4501] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The actin cytoskeleton is a potentially vulnerable property of cancer cells, yet chemotherapeutic targeting attempts have been hampered by unacceptable toxicity. In this study, we have shown that it is possible to disrupt specific actin filament populations by targeting isoforms of tropomyosin, a core component of actin filaments, that are selectively upregulated in cancers. A novel class of anti-tropomyosin compounds has been developed that preferentially disrupts the actin cytoskeleton of tumor cells, impairing both tumor cell motility and viability. Our lead compound, TR100, is effective in vitro and in vivo in reducing tumor cell growth in neuroblastoma and melanoma models. Importantly, TR100 shows no adverse impact on cardiac structure and function, which is the major side effect of current anti-actin drugs. This proof-of-principle study shows that it is possible to target specific actin filament populations fundamental to tumor cell viability based on their tropomyosin isoform composition. This improvement in specificity provides a pathway to the development of a novel class of anti-actin compounds for the potential treatment of a wide variety of cancers.
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Affiliation(s)
- Justine R Stehn
- School of Medical Sciences, University of New South Wales, Australia
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Mesa-Pereira B, Medina C, Camacho EM, Flores A, Santero E. Novel tools to analyze the function of Salmonella effectors show that SvpB ectopic expression induces cell cycle arrest in tumor cells. PLoS One 2013; 8:e78458. [PMID: 24205236 PMCID: PMC3804527 DOI: 10.1371/journal.pone.0078458] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 09/12/2013] [Indexed: 01/26/2023] Open
Abstract
In order to further characterize its role in pathogenesis and to establish whether its overproduction can lead to eukaryotic tumor cell death, Salmonella strains able to express its virulence factor SpvB (an ADP-ribosyl transferase enzyme) in a salicylate-inducible way have been constructed and analyzed in different eukaryotic tumor cell lines. To do so, the bacterial strains bearing the expression system have been constructed in a ∆purD background, which allows control of bacterial proliferation inside the eukaryotic cell. In the absence of bacterial proliferation, salicylate-induced SpvB production resulted in activation of caspases 3 and 7 and apoptotic cell death. The results clearly indicated that controlled SpvB production leads to F-actin depolimerization and either G1/S or G2/M phase arrest in all cell lines tested, thus shedding light on the function of SpvB in Salmonella pathogenesis. In the first place, the combined control of protein production by salicylate regulated vectors and bacterial growth by adenine concentration offers the possibility to study the role of Salmonella effectors during eukaryotic cells infection. In the second place, the salicylate-controlled expression of SpvB by the bacterium provides a way to evaluate the potential of other homologous or heterologous proteins as antitumor agents, and, eventually to construct novel potential tools for cancer therapy, given that Salmonella preferentially proliferates in tumors.
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Affiliation(s)
- Beatriz Mesa-Pereira
- Centro Andaluz de Biología del Desarrollo/ CSIC/ Universidad Pablo de Olavide/ Junta de Andalucía. Departamento de Biología Molecular e Ingeniería Bioquímica, Seville, Spain
| | - Carlos Medina
- Centro Andaluz de Biología del Desarrollo/ CSIC/ Universidad Pablo de Olavide/ Junta de Andalucía. Departamento de Biología Molecular e Ingeniería Bioquímica, Seville, Spain
| | - Eva María Camacho
- Centro Andaluz de Biología del Desarrollo/ CSIC/ Universidad Pablo de Olavide/ Junta de Andalucía. Departamento de Biología Molecular e Ingeniería Bioquímica, Seville, Spain
| | - Amando Flores
- Centro Andaluz de Biología del Desarrollo/ CSIC/ Universidad Pablo de Olavide/ Junta de Andalucía. Departamento de Biología Molecular e Ingeniería Bioquímica, Seville, Spain
- * E-mail:
| | - Eduardo Santero
- Centro Andaluz de Biología del Desarrollo/ CSIC/ Universidad Pablo de Olavide/ Junta de Andalucía. Departamento de Biología Molecular e Ingeniería Bioquímica, Seville, Spain
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Ma C, Diraviyam K, Maier ME, Sept D, Sibley LD. Synthetic chondramide A analogues stabilize filamentous actin and block invasion by Toxoplasma gondii. JOURNAL OF NATURAL PRODUCTS 2013; 76:1565-1572. [PMID: 24020843 PMCID: PMC3787807 DOI: 10.1021/np400196w] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Indexed: 05/31/2023]
Abstract
Apicomplexan parasites such as Toxoplasma gondii rely on actin-based motility to cross biological barriers and invade host cells. Key structural and biochemical differences in host and parasite actins make this an attractive target for small-molecule inhibitors. Here we took advantage of recent advances in the synthesis of cyclic depsipeptide compounds that stabilize filamentous actin to test the ability of chondramides to disrupt growth of T. gondii in vitro. Structural modeling of chondramide A (2) binding to an actin filament model revealed variations in the binding site between host and parasite actins. A series of 10 previously synthesized analogues (2b-k) with substitutions in the β-tyrosine moiety blocked parasite growth on host cell monolayers with EC₅₀ values that ranged from 0.3 to 1.3 μM. In vitro polymerization assays using highly purified recombinant actin from T. gondii verified that synthetic and natural product chondramides target the actin cytoskeleton. Consistent with this, chondramide treatment blocked parasite invasion into host cells and was more rapidly effective than pyrimethamine, a standard therapeutic agent. Although the current compounds lack specificity for parasite vs host actin, these studies provide a platform for the future design and synthesis of synthetic cyclic peptide inhibitors that selectively disrupt actin dynamics in parasites.
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Affiliation(s)
- Christopher
I. Ma
- Department
of Molecular Microbiology, Washington University
School of Medicine, St. Louis, Missouri 63110, United States
| | - Karthikeyan Diraviyam
- Department
of Biomedical Engineering and Center for Computational Medicine and
Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Martin E. Maier
- Institut
für Organische Chemie, Universität
Tübingen, 72076 Tübingen, Germany
| | - David Sept
- Department
of Biomedical Engineering and Center for Computational Medicine and
Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - L. David Sibley
- Department
of Molecular Microbiology, Washington University
School of Medicine, St. Louis, Missouri 63110, United States
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Novel small-molecule compounds that affect cellular morphogenesis in yeast and mammalian cells. Biosci Biotechnol Biochem 2013; 77:1669-76. [PMID: 23924729 DOI: 10.1271/bbb.130212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Drugs affecting cellular morphological changes leading to tumor cell migration and invasion are desirable for cancer therapy. In the present study, we screened for small-molecule compounds that affect the cellular morphology of both unicellular yeast and mammalian HEK293 cells to identify drug candidates. The yeast formin protein Bni1 and Src homology 3 (SH3)-pleckstrin homology (PH) domain protein Boi1, which are required for proper morphogenesis, cause growth defects when overexpressed in yeast. Using this system, we screened a chemical library consisting of ~8000 compounds to identify drug candidates that suppress these growth defects. None of the screened compounds induced morphological changes in vegetatively growing yeast cells, but several compounds had inhibitory effects on pheromone-induced projection formation and actin localization, suggesting that these compounds affected a specific stage of morphogenesis. Five of the compounds also induced morphological changes in mammalian HEK293 cells. Among the identified compounds, BTB03156, 2-[(4-chlorophenyl)sulfonyl]-1-methyl-3,5-dinitrobenzene, and BTB02467, 1-[(4-chlorophenyl)sulfonyl]-2-nitro-4-(trifluoromethyl)benzene, although they have similar structures, displayed differing effects on the yeast growth defects caused by latrunculin A, an actin polymerization inhibitor. The chemical library compounds identified using this in vivo screening approach are simple, cell-permeable molecules, and therefore may be useful in the development of therapeutic drugs for cancer metastasis and other actin-related diseases.
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Abstract
This review covers the literature published in 2011 for marine natural products, with 870 citations (558 for the period January to December 2011) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1152 for 2011), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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The effects of jaspamide on human cardiomyocyte function and cardiac ion channel activity. Toxicol In Vitro 2012; 27:745-51. [PMID: 23261645 DOI: 10.1016/j.tiv.2012.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 11/16/2012] [Accepted: 12/06/2012] [Indexed: 01/10/2023]
Abstract
Jaspamide (jasplakinolide; NSC-613009) is a cyclodepsipeptide that has antitumor activity. A narrow margin of safety was observed between doses required for efficacy in mouse tumor models and doses that caused severe acute toxicity in rats and dogs. We explored the hypothesis that the observed toxicity was due to cardiotoxicity. Jaspamide was tested in a patch clamp assay to determine its effect on selected cardiac ion channels. Jaspamide (10 μM) inhibited Kv1.5 activity by 98.5%. Jaspamide also inhibited other channels including Cav1.2, Cav3.2, and HCN2; however, the Kv11.1 (hERG) channel was minimally affected. Using spontaneously contracting human cardiomyocytes derived from induced pluripotent stem cells, effects on cardiomyocyte contraction and viability were also examined. Jaspamide (30 nM to 30 μM) decreased cardiomyocyte cell indices and beat amplitude, putative measurements of cell viability and cardiac contractility, respectively. Concentration-dependent increases in rhythmic beating rate were noted at ≤ 6 h of treatment, followed by dose-dependent decreases after 6 and 72 h exposure. The toxic effects of jaspamide were compared with that of the known cardiotoxicant mitoxantrone, and confirmed by multiparameter fluorescence imaging analysis. These results support the hypothesis that the toxicity observed in rats and dogs is due to toxic effects of jaspamide on cardiomyocytes.
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Milroy LG, Rizzo S, Calderon A, Ellinger B, Erdmann S, Mondry J, Verveer P, Bastiaens P, Waldmann H, Dehmelt L, Arndt HD. Selective chemical imaging of static actin in live cells. J Am Chem Soc 2012; 134:8480-6. [PMID: 22475347 DOI: 10.1021/ja211708z] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
We have characterized rationally designed and optimized analogues of the actin-stabilizing natural products jasplakinolide and chondramide C. Efficient actin staining was achieved in fixed permeabilized and non-permeabilized cells using different combinations of dye and linker length, thus highlighting the degree of molecular flexibility of the natural product scaffold. Investigations into synthetically accessible, non-toxic analogues have led to the characterization of a powerful cell-permeable probe to selectively image static, long-lived actin filaments against dynamic F-actin and monomeric G-actin populations in live cells, with negligible disruption of rapid actin dynamics.
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Affiliation(s)
- Lech-Gustav Milroy
- Department of Chemical Biology, Max-Planck-Institute of Molecular Physiology, Dortmund, Germany
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Matsuki-Fukushima M, Hashimoto S, Murakami M, Ogata Y, Fujita-Yoshigaki J, Narita T, Sugiya H. The actin-specific reagent jasplakinolide induces apoptosis in primary rat parotid acinar cells. Arch Oral Biol 2012; 57:567-76. [DOI: 10.1016/j.archoralbio.2011.10.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 10/14/2011] [Accepted: 10/23/2011] [Indexed: 11/16/2022]
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