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Nurcahyanti ADR, Kusmita L, Wink M. Bixin and fucoxanthin sensitize human lung cancer and cervical cancer cell to cisplatin in vitro. BMC Res Notes 2021; 14:454. [PMID: 34922615 PMCID: PMC8684137 DOI: 10.1186/s13104-021-05866-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 11/29/2021] [Indexed: 12/16/2022] Open
Abstract
Objective Cisplatin is a conventional anticancer drug that generates reactive oxygen species and causes apoptosis. However, many cancer cells develop alterations in the ATP binding cassette transporter responsible for the uptake and efflux process, which leads to resistance. Many natural products have shown potential to compete with ATP binding cassette transporter and may sensitize resistant cells to cisplatin. Studies have shown pro-oxidant effect of carotenoids that promote apoptosis of cancer cells. Bixin and fucoxanthin are well-known carotenoids with known antioxidant properties, however their bioactivity in lung cancer cells, clinically known to develop resistance due to ATP binding cassette transporter, has been minimally studied. This study is the first to investigate the potential of bixin and fucoxanthin to sensitize human lung cancer cell line, A549 and cervical cancer cell line, HeLa, to cisplatin. Drug combination method developed by Chou and Talalay theorem was employed. Result Employing the best combination ratio, this study shows selective sensitization of cancer cells to cisplatin after bixin and fucoxanthin treatment. Further study on the mechanism of action in specific types of cancer cells is warranted. It may improve cisplatin sensitivity in tumors and rational use of cancer drugs. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s13104-021-05866-4.
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Affiliation(s)
- Agustina Dwi Retno Nurcahyanti
- Department of Pharmacy, School of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Pluit Raya 2, Jakarta, 14440, Indonesia.
| | - Lia Kusmita
- Department of Pharmacy, STIFAR Yayasan Pharmasi Semarang, Letjend Sarwo Edhie Wibowo KM 1, Plamongansari Pucanggading, Semarang, Indonesia
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120, Heidelberg, Germany
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2
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Liu Z, Zhang W, Cheng X, Wang H, Bian L, Wang J, Han Z, Wang Y, Lian X, Liu B, Ren Z, Zhang B, Jiang Z, Lin Z, Gao Y. Overexpressed XRCC2 as an independent risk factor for poor prognosis in glioma patients. Mol Med 2021; 27:52. [PMID: 34051735 PMCID: PMC8164800 DOI: 10.1186/s10020-021-00316-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 05/20/2021] [Indexed: 01/08/2023] Open
Abstract
Background XRCC2, a homologous recombination-related gene, has been reported to be associated with a variety of cancers. However, its role in glioma has not been reported. This study aimed to find out the role of XRCC2 in glioma and reveal in which glioma-specific biological processes is XRCC2 involved based on thousands of glioma samples, thereby, providing a new perspective in the treatment and prognostic evaluation of glioma.
Methods The expression characteristics of XRCC2 in thousands of glioma samples from CGGA and TCGA databases were comprehensively analyzed. Wilcox or Kruskal test was used to analyze the expression pattern of XRCC2 in gliomas with different clinical and molecular features. The effect of XRCC2 on the prognosis of glioma patients was explored by Kaplan–Meier and Cox regression. Gene set enrichment analysis (GSEA) revealed the possible cellular mechanisms involved in XRCC2 in glioma. Connectivity map (CMap) was used to screen small molecule drugs targeting XRCC2 and the expression levels of XRCC2 were verified in glioma cells and tissues by RT-qPCR and immunohistochemical staining. Results We found the overexpression of XRCC2 in glioma. Moreover, the overexpressed XRCC2 was associated with a variety of clinical features related to prognosis. Cox and meta-analyses showed that XRCC2 is an independent risk factor for the poor prognosis of glioma. Furthermore, the results of GSEA indicated that overexpressed XRCC2 could promote malignant progression through involved signaling pathways, such as in the cell cycle. Finally, doxazosin, quinostatin, canavanine, and chrysin were identified to exert anti-glioma effects by targeting XRCC2. Conclusions This study analyzed the expression pattern of XRCC2 in gliomas and its relationship with prognosis using multiple datasets. This is the first study to show that XRCC2, a novel oncogene, is significantly overexpressed in glioma and can lead to poor prognosis in glioma patients. XRCC2 could serve as a new biomarker for glioma diagnosis, treatment, and prognosis evaluation, thus bringing new insight into the management of glioma. Supplementary Information The online version contains supplementary material available at 10.1186/s10020-021-00316-0.
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Affiliation(s)
- Zhendong Liu
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China.,Microbiology Laboratory, Henan Provincial People's Hospital, Zhengzhou, China
| | - Wang Zhang
- Department of Neurosurgery, The First Affiliate Hospital of Harbin Medical University, 23 Youzheng Street, Nangang District, Harbin, 150001, China
| | - Xingbo Cheng
- Department of Neurosurgery, The First Affiliate Hospital of Harbin Medical University, 23 Youzheng Street, Nangang District, Harbin, 150001, China
| | - Hongbo Wang
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Lu Bian
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Jialin Wang
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Zhibin Han
- Department of Neurosurgery, The First Affiliate Hospital of Harbin Medical University, 23 Youzheng Street, Nangang District, Harbin, 150001, China
| | - Yanbiao Wang
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Xiaoyu Lian
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Binfeng Liu
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Zhishuai Ren
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Bo Zhang
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China
| | - Zhenfeng Jiang
- Department of Neurosurgery, The First Affiliate Hospital of Harbin Medical University, 23 Youzheng Street, Nangang District, Harbin, 150001, China
| | - Zhiguo Lin
- Department of Neurosurgery, The First Affiliate Hospital of Harbin Medical University, 23 Youzheng Street, Nangang District, Harbin, 150001, China.
| | - Yanzheng Gao
- Department of Orthopaedics, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, School of Clinical Medicine, Henan University, Zhengzhou, Henan, China. .,Microbiology Laboratory, Henan Provincial People's Hospital, Zhengzhou, China.
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Edathara PM, Chintalapally S, Makani VKK, Pant C, Yerramsetty S, D Rao M, Bhadra MP. Inhibitory role of oleanolic acid and esculetin in HeLa cells involve multiple signaling pathways. Gene 2020; 771:145370. [PMID: 33346097 DOI: 10.1016/j.gene.2020.145370] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/04/2020] [Accepted: 12/11/2020] [Indexed: 11/30/2022]
Abstract
The global burden of cervical cancer from low and middle-income groups is increasing at alarming rates with more than half a million women being diagnosed every year. Although the disease is largely preventable when screened and diagnosed in earlier stages, the development of resistance and relapse had resulted in a poor prognosis. Therefore, a comprehensive approach needs to be put forward to understand and develop new preventive and therapeutic strategies to effectively combat cancer. Recently, much attention has been diverted to plant-derivatives for the treatment as they exhibit potent anti-cancer properties and side-effects caused by chemotherapeutic agents can also be prevented. Oleanolic acid and Esculetin are natural compounds known for their anti-cancer properties. Hence, the present study investigates the effect and mechanism of these compounds on cervical carcinoma, using HeLa cells. Posttreatment, it was observed that these compounds inhibited proliferation by both arresting the cells in the sub G1 phase and inducing senescence. Also, a marked reduction in the migration and cell survival was observed, as evidenced by results obtained from wound healing assay and Annexin V-FITC/PI staining. Furthermore, studies on the expression pattern of genes involved in major signaling pathways demonstrated a profound effect of these compounds. Taken together, the results of our study suggest that both Oleanolic acid and esculetin serve as a plausible therapeutic agent.
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Affiliation(s)
| | - Shivakanth Chintalapally
- Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India; Department of Genetics, Osmania University, Hyderabad, Telangana, India
| | - Venkata Krishna Kanth Makani
- Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), Training and Development Complex, CSIR Campus, CSIR Road, Taramani, Chennai, India
| | - Chitrakshi Pant
- Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - Suresh Yerramsetty
- Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India
| | - Manohar D Rao
- Department of Genetics, Osmania University, Hyderabad, Telangana, India
| | - Manika Pal Bhadra
- Applied Biology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, India; Academy of Scientific and Innovative Research (AcSIR), Training and Development Complex, CSIR Campus, CSIR Road, Taramani, Chennai, India.
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Albukhaty S, Al-Musawi S, Abdul Mahdi S, Sulaiman GM, Alwahibi MS, Dewir YH, Soliman DA, Rizwana H. Investigation of Dextran-Coated Superparamagnetic Nanoparticles for Targeted Vinblastine Controlled Release, Delivery, Apoptosis Induction, and Gene Expression in Pancreatic Cancer Cells. Molecules 2020; 25:molecules25204721. [PMID: 33076247 PMCID: PMC7587551 DOI: 10.3390/molecules25204721] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/10/2020] [Accepted: 10/12/2020] [Indexed: 02/07/2023] Open
Abstract
In the current study, the surface of superparamagnetic iron oxide (SPION) was coated with dextran (DEX), and conjugated with folic acid (FA), to enhance the targeted delivery and uptake of vinblastine (VBL) in PANC-1 pancreatic cancer cells. Numerous analyses were performed to validate the prepared FA-DEX-VBL-SPION, such as field emission scanning transmission electron microscopy, high-resolution transmission electron microscopy, dynamic light scattering (DLS), Zeta Potential, Fourier transform infrared spectroscopy, and vibrating sample magnetometry (VSM). The delivery system capacity was evaluated by loading and release experiments. Moreover, in vitro biological studies, including a cytotoxicity study, cellular uptake assessment, apoptosis analysis, and real-time PCR, were carried out. The results revealed that the obtained nanocarrier was spherical with a suitable dispersion and without visible aggregation. Its average size, polydispersity, and zeta were 74 ± 13 nm, 0.080, and −45 mV, respectively. This dual functional nanocarrier also exhibited low cytotoxicity and a high apoptosis induction potential for successful VBL co-delivery. Real-time quantitative PCR analysis demonstrated the activation of caspase-3, NF-1, PDL-1, and H-ras inhibition, in PANC-1 cells treated with the FA-VBL-DEX-SPION nanostructure. Close inspection of the obtained data proved that the FA-VBL-DEX-SPION nanostructure possesses a noteworthy chemo-preventive effect on pancreatic cancer cells through the inhibition of cell proliferation and induction of apoptosis.
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Affiliation(s)
- Salim Albukhaty
- Department of Basic Sciences, College of Nursing, University of Misan, Maysan 62001, Iraq;
| | - Sharafaldin Al-Musawi
- Faculty of Biotechnology, Al-Qasim Green University, Babylon 51013, Iraq;
- Correspondence:
| | - Salih Abdul Mahdi
- Faculty of Biotechnology, Al-Qasim Green University, Babylon 51013, Iraq;
| | - Ghassan M. Sulaiman
- Department of Applied Sciences, University of Technology, Baghdad 10066, Iraq;
| | - Mona S. Alwahibi
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (M.S.A.); (D.A.S.); (H.R.)
| | - Yaser Hassan Dewir
- College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia;
- Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
| | - Dina A. Soliman
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (M.S.A.); (D.A.S.); (H.R.)
| | - Humaira Rizwana
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia; (M.S.A.); (D.A.S.); (H.R.)
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Pezzani R, Salehi B, Vitalini S, Iriti M, Zuñiga FA, Sharifi-Rad J, Martorell M, Martins N. Synergistic Effects of Plant Derivatives and Conventional Chemotherapeutic Agents: An Update on the Cancer Perspective. ACTA ACUST UNITED AC 2019; 55:medicina55040110. [PMID: 30999703 PMCID: PMC6524059 DOI: 10.3390/medicina55040110] [Citation(s) in RCA: 71] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Revised: 03/28/2019] [Accepted: 04/10/2019] [Indexed: 01/07/2023]
Abstract
Synergy is a process in which some substances cooperate to reach a combined effect that is greater than the sum of their separate effects. It can be considered a natural "straight" strategy which has evolved by nature to obtain more efficacy at low cost. In this regard, synergistic effects may be observed in the interaction between herbal products and conventional drugs or biochemical compounds. It is important to identify and exploit these interactions since any improvement brought by such kind of process can be advantageously used to treat human disorders. Even in a complex disease such as cancer, positive synergistic plant-drug interactions should be investigated to achieve the best outcomes, including providing a greater benefit to patients or avoiding adverse side effects. This review analyzes and summarizes the current knowledge on the synergistic effects of plant-drug interactions with a focus on anticancer strategies.
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Affiliation(s)
- Raffaele Pezzani
- Endocrinology Unit, Department of Medicine, University of Padova, via Ospedale 105, 35128 Padova, Italy.
- AIROB-Associazione Italiana per la Ricerca Oncologica di Base, 3520128 Padova, Italy.
| | - Bahare Salehi
- Student Research Committee, School of Medicine, Bam University of Medical Sciences, Bam 44340847, Iran.
| | - Sara Vitalini
- Department of Agricultural and Environmental Sciences, Milan State University, via G. Celoria 2, 20133 Milan, Italy.
| | - Marcello Iriti
- Department of Agricultural and Environmental Sciences, Milan State University, via G. Celoria 2, 20133 Milan, Italy.
| | - Felipe Andrés Zuñiga
- Department of Clinical Biochemistry and Immunology, Faculty of Pharmacy, University of Concepción, Concepcion 4070386, Chile.
| | - Javad Sharifi-Rad
- Food Safety Research Center (Salt), Semnan University of Medical Sciences, Semnan 3519899951, Iran.
| | - Miquel Martorell
- Department of Nutrition and Dietetics, Faculty of Pharmacy, University of Concepción, Concepcion 4070386, Chile.
| | - Natália Martins
- Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal.
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal.
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Smith ZM, Steinmetz V, Martens J, Oomens J, Poutsma JC. Infrared Multiple Photon Dissociation Spectroscopy of Cationized Canavanine: Side-Chain Substitution Influences Gas-Phase Zwitterion Formation †. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 2018; 429:158-173. [PMID: 29962900 PMCID: PMC6020040 DOI: 10.1016/j.ijms.2017.08.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Infrared multiple photon dissociation spectroscopy was performed on protonated and cationized canavanine (Cav), a non-protein amino acid oxy-analog of arginine. Infrared spectra in the XH stretching region (3000 - 4000 cm-1) were obtained at the Centre Laser Infrarouge d'Orsay (CLIO) facility. Comparison of the experimental infrared spectra with scaled harmonic frequencies at the B3LYP/6-31+G(d,p) level of theory indicates that canavanine is in a canonical neutral form in CavH+, CavLi+, and CavNa+; therefore, these cations are charge-solvated structures. The infrared spectrum of CavK+ is consistent with a mixture of Cav in canonical and zwitterionic forms leading to both charge-solvated and salt-bridged cationic structures. The Cav moiety in CavCs+ is shown to be zwitterionic, forming a salt-bridged structure for the cation. Infrared spectra in the fingerprint region (1000 - 2000 cm-1) obtained at the FELIX Laboratory in Nijmegen, Netherlands support these assignments. These results show that that a single oxygen atom substitution in the side chain reduces the stability of the zwitterion compared to that of the protein amino acid arginine (Arg), which has been shown previously to adopt a zwitterionic structure in ArgNa+ and ArgK+. This difference can be explained in part due to the decreased basicity of Cav (PA = 1001 kJ/mol) as compared to arginine (PA = 1051 kJ/mol), but not entirely, as lysine, which has nearly the same proton affinity as Cav, (~993 kJ/mol) forms only canonical structures with Na+, K+, and Cs+. A major difference between the zwitterionic forms of ArgM+ and CavM+ is that the protonation site is on the side chain for Arg and on the N-terminus for Cav. This results in systematically weaker salt bridges in the Cav zwitterions. In addition, the presence of another hydrogen-bonding acceptor atom in the side chain contributes to the stability of the canonical structures for the smaller alkali cations.
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Affiliation(s)
- Zachary M Smith
- Department of Chemistry, The College of William and Mary, Williamsburg, VA 23187-8795
| | - Vincent Steinmetz
- Laboratoire de Chimie Physique, CNRS UMR 8000, Université Paris Sud, Université Paris Saclay, CNRS, Orsay France
| | - Jonathan Martens
- Radboud University, Institute for Molecules and Materials FELIX Laboratory, Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials FELIX Laboratory, Nijmegen, The Netherlands
- Van't Hoff Institute for Molecular Sciences University of Amsterdam, Amsterdam, The Netherlands
| | - John C Poutsma
- Department of Chemistry, The College of William and Mary, Williamsburg, VA 23187-8795
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Wang X, Tanaka M, Peixoto HS, Wink M. Cucurbitacins: elucidation of their interactions with the cytoskeleton. PeerJ 2017; 5:e3357. [PMID: 28584704 PMCID: PMC5452965 DOI: 10.7717/peerj.3357] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 04/26/2017] [Indexed: 01/25/2023] Open
Abstract
Cucurbitacins, a class of toxic tetracyclic triterpenoids in Cucurbitaceae, modulate many molecular targets. Here we investigated the interactions of cucurbitacin B, E and I with cytoskeletal proteins such as microtubule and actin filaments. The effects of cucurbitacin B, E and I on microtubules and actin filaments were studied in living cells (Hela and U2OS) and in vitro using GFP markers, immunofluorescence staining and in vitro tubulin polymerization assay. Cucurbitacin B, E and I apparently affected microtubule structures in living cells and cucurbitacin E inhibited tubulin polymerization in vitro with IC50 value of 566.91 ± 113.5 µM. Cucurbitacin E did not affect the nucleation but inhibited the growth phase and steady state during microtubule assembly in vitro. In addition, cucurbitacin B, E and I all altered mitotic spindles and induced the cell cycle arrest at G2/M phase. Moreover, they all showed potent effects on actin cytoskeleton by affecting actin filaments through the depolymerization and aggregation. The interactions of cucubitacin B, E and I with microtubules and actin filaments present new insights into their modes of action.
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Affiliation(s)
- Xiaojuan Wang
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
| | - Mine Tanaka
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
| | - Herbenya Silva Peixoto
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
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Wang X, Tanaka M, Krstin S, Peixoto HS, Wink M. The Interference of Selected Cytotoxic Alkaloids with the Cytoskeleton: An Insight into Their Modes of Action. Molecules 2016; 21:E906. [PMID: 27420038 PMCID: PMC6273799 DOI: 10.3390/molecules21070906] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 07/05/2016] [Accepted: 07/06/2016] [Indexed: 02/01/2023] Open
Abstract
Alkaloids, the largest group among the nitrogen-containing secondary metabolites of plants, usually interact with several molecular targets. In this study, we provide evidence that six cytotoxic alkaloids (sanguinarine, chelerythrine, chelidonine, noscapine, protopine, homoharringtonine), which are known to affect neuroreceptors, protein biosynthesis and nucleic acids, also interact with the cellular cytoskeleton, such as microtubules and actin filaments, as well. Sanguinarine, chelerythrine and chelidonine depolymerized the microtubule network in living cancer cells (Hela cells and human osteosarcoma U2OS cells) and inhibited tubulin polymerization in vitro with IC50 values of 48.41 ± 3.73, 206.39 ± 4.20 and 34.51 ± 9.47 μM, respectively. However, sanguinarine and chelerythrine did not arrest the cell cycle while 2.5 μM chelidonine arrested the cell cycle in the G₂/M phase with 88.27% ± 0.99% of the cells in this phase. Noscapine and protopine apparently affected microtubule structures in living cells without affecting tubulin polymerization in vitro, which led to cell cycle arrest in the G2/M phase, promoting this cell population to 73.42% ± 8.31% and 54.35% ± 11.26% at a concentration of 80 μM and 250.9 μM, respectively. Homoharringtonine did not show any effects on microtubules and cell cycle, while the known microtubule-stabilizing agent paclitaxel was found to inhibit tubulin polymerization in the presence of MAPs in vitro with an IC50 value of 38.19 ± 3.33 μM. Concerning actin filaments, sanguinarine, chelerythrine and chelidonine exhibited a certain effect on the cellular actin filament network by reducing the mass of actin filaments. The interactions of these cytotoxic alkaloids with microtubules and actin filaments present new insights into their molecular modes of action.
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Affiliation(s)
- Xiaojuan Wang
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Mine Tanaka
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Sonja Krstin
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Herbenya Silva Peixoto
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
| | - Michael Wink
- Department of Biology, Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, INF 364, D-69120 Heidelberg, Germany.
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