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Platinum(II) N-heterocyclic carbene complexes arrest metastatic tumor growth. Proc Natl Acad Sci U S A 2021; 118:2025806118. [PMID: 33883283 DOI: 10.1073/pnas.2025806118] [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] [Indexed: 11/18/2022] Open
Abstract
Vimentin is a cytoskeletal intermediate filament protein that plays pivotal roles in tumor initiation, progression, and metastasis, and its overexpression in aggressive cancers predicted poor prognosis. Herein described is a highly effective antitumor and antimetastatic metal complex [PtII(C^N^N)(NHC2Bu)]PF6 (Pt1a; HC^N^N = 6-phenyl-2,2'-bipyridine; NHC= N-heterocyclic carbene) that engages vimentin via noncovalent binding interactions with a distinct orthogonal structural scaffold. Pt1a displays vimentin-binding affinity with a dissociation constant of 1.06 µM from surface plasmon resonance measurements and fits into a pocket between the coiled coils of the rod domain of vimentin with multiple hydrophobic interactions. It engages vimentin in cellulo, disrupts vimentin cytoskeleton, reduces vimentin expression in tumors, suppresses xenograft growth and metastasis in different mouse models, and is well tolerated, attributable to biotransformation to less toxic and renal-clearable platinum(II) species. Our studies uncovered the practical therapeutic potential of platinum(II)‒NHC complexes as effective targeted chemotherapy for combating metastatic and cisplatin-resistant cancers.
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52
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Zottel A, Jovčevska I, Šamec N, Komel R. Cytoskeletal proteins as glioblastoma biomarkers and targets for therapy: A systematic review. Crit Rev Oncol Hematol 2021; 160:103283. [PMID: 33667657 DOI: 10.1016/j.critrevonc.2021.103283] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 02/18/2021] [Accepted: 02/27/2021] [Indexed: 12/21/2022] Open
Abstract
Glioblastoma, the most common primary brain malignancy, is an exceptionally fatal cancer. Lack of suitable biomarkers and efficient treatment largely contribute to the therapy failure. Cytoskeletal proteins are crucial proteins in glioblastoma pathogenesis and can potentially serve as biomarkers and therapeutic targets. Among them, GFAP, has gained most attention as potential diagnostic biomarker, while vimentin and microtubules are considered as prospective therapeutic targets. Microtubules represent one of the best anti-cancer targets due to their critical role in cell proliferation. Despite testing in clinical trials, the efficiency of taxanes, epothilones, vinca-domain binding drugs, colchicine-domain binding drugs and γ-tubulin binding drugs remains to be confirmed. Moreover, tumor treating field that disrupts microtubules draw attention because of its high efficiency and is called "the fourth cancer treatment modality". Thereby, because of the involvement of cytoskeleton in key physiological and pathological processes, its therapeutic potential in glioblastoma is currently extensively investigated.
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Affiliation(s)
- Alja Zottel
- Medical Centre for Molecular Biology, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.
| | - Ivana Jovčevska
- Medical Centre for Molecular Biology, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Neja Šamec
- Medical Centre for Molecular Biology, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - Radovan Komel
- Medical Centre for Molecular Biology, Institute of Biochemistry and Molecular Genetics, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia.
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53
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Mallipeddi H, Thyagarajan A, Sahu RP. Implications of Withaferin-A for triple-negative breast cancer chemoprevention. Biomed Pharmacother 2021; 134:111124. [PMID: 33434782 DOI: 10.1016/j.biopha.2020.111124] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 11/30/2020] [Accepted: 12/08/2020] [Indexed: 02/08/2023] Open
Abstract
Triple-negative breast cancer (TNBC) accounts for about 15 % of all breast cancer cases, and unlike other malignancies, it lacks definite prognostic markers. While improved survival responses have been documented with the ongoing therapeutic approaches, the development of tumor resistance mechanisms to these treatment options pose major challenges in the treatment of TNBC. Notably, naturally occurring medicinal compounds have been studied extensively for their anti-neoplastic activities in cancer models including breast cancer due to their safe and non-deleterious effects. Among various dietary compounds, Withaferin-A (WA), a phytochemical derived from an ayurvedic medicinal plant, Withania somnifera has been characterized to possess anti-inflammatory and anti-cancer properties. Importantly, multiple studies have shown that WA exhibits promising anti-tumoral activities against in-vitro and in-vivo experimental models of TNBC and that its combination has been documented to enhance chemotherapy efficacy. The current review highlights the mechanistic insights with recent updates including the pharmacokinetics parameters and implications of WA against breast cancer with major emphasis on TNBC.
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Affiliation(s)
- Harshini Mallipeddi
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, 45435, United States
| | - Anita Thyagarajan
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, 45435, United States.
| | - Ravi P Sahu
- Department of Pharmacology and Toxicology, Boonshoft School of Medicine at Wright State University, Dayton, OH, 45435, United States.
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54
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Ha J, Park H, Park J, Park SB. Recent advances in identifying protein targets in drug discovery. Cell Chem Biol 2020; 28:394-423. [PMID: 33357463 DOI: 10.1016/j.chembiol.2020.12.001] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 11/11/2020] [Accepted: 11/30/2020] [Indexed: 02/06/2023]
Abstract
Phenotype-based screening has emerged as an alternative route for discovering new chemical entities toward first-in-class therapeutics. However, clarifying their mode of action has been a significant bottleneck for drug discovery. For target protein identification, conventionally bioactive small molecules are conjugated onto solid supports and then applied to isolate target proteins from whole proteome. This approach requires a high binding affinity between bioactive small molecules and their target proteins. Besides, the binding affinity can be significantly hampered after structural modifications of bioactive molecules with linkers. To overcome these limitations, two major strategies have recently been pursued: (1) the covalent conjugation between small molecules and target proteins using photoactivatable moieties or electrophiles, and (2) label-free target identification through monitoring target engagement by tracking the thermal, proteolytic, or chemical stability of target proteins. This review focuses on recent advancements in target identification from covalent capturing to label-free strategies.
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Affiliation(s)
- Jaeyoung Ha
- Department of Biophysics and Chemical Biology, Seoul National University, Seoul 08826, Korea
| | - Hankum Park
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Jongmin Park
- Department of Chemistry, Kangwon National University, Chuncheon 24341, Korea.
| | - Seung Bum Park
- Department of Biophysics and Chemical Biology, Seoul National University, Seoul 08826, Korea; CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul 08826, Korea.
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55
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Behl T, Sharma A, Sharma L, Sehgal A, Zengin G, Brata R, Fratila O, Bungau S. Exploring the Multifaceted Therapeutic Potential of Withaferin A and Its Derivatives. Biomedicines 2020; 8:E571. [PMID: 33291236 PMCID: PMC7762146 DOI: 10.3390/biomedicines8120571] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/01/2020] [Accepted: 12/04/2020] [Indexed: 12/12/2022] Open
Abstract
Withaferin A (WA), a manifold studied, C28-steroidal lactone withanolide found in Withania somnifera. Given its unique beneficial effects, it has gathered attention in the era of modern science. Cancer, being considered a "hopeless case and the leading cause of death worldwide, and the available conventional therapies have many lacunae in the form of side effects. The poly pharmaceutical natural compound, WA treatment, displayed attenuation of various cancer hallmarks by altering oxidative stress, promoting apoptosis, and autophagy, inhibiting cell proliferation, reducing angiogenesis, and metastasis progression. The cellular proteins associated with antitumor pathways were also discussed. WA structural modifications attack multiple signal transduction pathways and enhance the therapeutic outcomes in various diseases. Moreover, it has shown validated pharmacological effects against multiple neurodegenerative diseases by inhibiting acetylcholesterinases and butyrylcholinesterases enzyme activity, antidiabetic activity by upregulating adiponectin and preventing the phosphorylation of peroxisome proliferator-activated receptors (PPARγ), cardioprotective activity by AMP-activated protein kinase (AMPK) activation and suppressing mitochondrial apoptosis. The current review is an extensive survey of various WA associated disease targets, its pharmacokinetics, synergistic combination, modifications, and biological activities.
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Affiliation(s)
- Tapan Behl
- Chitkara College of Pharmacy, Chitkara University, Punjab 140401, India;
| | - Aditi Sharma
- School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh 173229, India; (A.S.); (L.S.)
| | - Lalit Sharma
- School of Pharmaceutical Sciences, Shoolini University, Solan, Himachal Pradesh 173229, India; (A.S.); (L.S.)
| | - Aayush Sehgal
- Chitkara College of Pharmacy, Chitkara University, Punjab 140401, India;
| | - Gokhan Zengin
- Department of Biology, Faculty of Science, Selcuk University Campus, Konya 42250, Turkey;
| | - Roxana Brata
- Department of Medical Disciplines, Faculty of Medicine and Pharmacy, University of Oradea, 410073 Oradea, Romania; (R.B.); (O.F.)
| | - Ovidiu Fratila
- Department of Medical Disciplines, Faculty of Medicine and Pharmacy, University of Oradea, 410073 Oradea, Romania; (R.B.); (O.F.)
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, 410028 Oradea, Romania
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Liu J, Xie Y, Cui Z, Xia T, Wan L, Zhou H, Zhang P, Zhang Y, Guan F, Liu W, Shi C. Bnip3 interacts with vimentin, an intermediate filament protein, and regulates autophagy of hepatic stellate cells. Aging (Albany NY) 2020; 13:957-972. [PMID: 33290258 PMCID: PMC7834981 DOI: 10.18632/aging.202211] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 09/09/2020] [Indexed: 04/21/2023]
Abstract
Bnip3, which is regulated by Hif-1 in cells under oxygen deprivation, is a death related protein associated with autophagy and apoptosis. Hif-1 was reported to regulate autophagy to activate hepatic stellate cells (HSCs), while the specific molecular mechanism is vague. The possible mechanism of Hif-1 regulating autophagy of HSCs via Bnip3 was explored in this study. Bnip3 was detected in fibrotic liver tissues from humans and mice. Hif-1 was inhibited by chemical inhibitor and Bnip3 was detected in activated HSCs. The co-localization of Bnip3 and LC3B was captured by confocal microscopy and autophagic flow was assessed in Bnip3 siRNA transfected cells. Bnip3 interacted proteins were screened with mass spectrometry. The interaction of Bnip3 and vimentin was detected with co-immunoprecipitation and confocal microscopy. The results showed that Bnip3 was increased in fibrotic liver tissues and activated HSCs. Hif-1 inhibition suppressed Bnip3 expression in activated HSCs. Bnip3 was partially co-localized with autophagosomes and Bnip3 inhibition suppessed autophagy in activated HSCs. Bnip3 interacted with vimentin and Bnip3 expression was inhibited as vimentin was inhibited in activated HSCs. Conclusively, this study indicated that Bnip3 promoted autophagy and activation of HSCs, via interacting with vimentin, an intermediate filament protein with highly abundant expression in HSCs.
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Affiliation(s)
- Jie Liu
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
- Department of Hospital Infection Management, Wuhan Children’s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Yuyu Xie
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Zhangbo Cui
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Tian Xia
- Department of Surgery, Wuhan Third Hospital, Wuhan, PR China
| | - Lu Wan
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
- Department of Pathophysiology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Haifeng Zhou
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Peng Zhang
- Department of Immunology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Yijie Zhang
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Fei Guan
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Wenqi Liu
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
| | - Chunwei Shi
- Department of Pathogen Biology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, PR China
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57
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Gryadunova AA, Koudan EV, Rodionov SA, Pereira FDAS, Meteleva NY, Kasyanov VA, Parfenov VA, Kovalev AV, Khesuani YD, Mironov VA, Bulanova EA. Cytoskeleton systems contribute differently to the functional intrinsic properties of chondrospheres. Acta Biomater 2020; 118:141-152. [PMID: 33045401 DOI: 10.1016/j.actbio.2020.10.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/04/2020] [Accepted: 10/06/2020] [Indexed: 12/12/2022]
Abstract
Cytoskeleton systems, actin microfilaments, microtubules (MTs) and intermediate filaments (IFs) provide the biomechanical stability and spatial organization in cells. To understand the specific contributions of each cytoskeleton systems to intrinsic properties of spheroids, we've scrutinized the effects of the cytoskeleton perturbants, cytochalasin D (Cyto D), nocodazole (Noc) and withaferin A (WFA) on fusion, spreading on adhesive surface, morphology and biomechanics of chondrospheres (CSs). We confirmed that treatment with Cyto D but not with Noc or WFA severely affected CSs fusion and spreading dynamics and significantly reduced biomechanical properties of cell aggregates. Noc treatment affected spheroids spreading but not the fusion and surprisingly enhanced their stiffness. Vimentin intermediate filaments (VIFs) reorganization affected CSs spreading only. The analysis of all three cytoskeleton systems contribution to spheroids intrinsic properties was performed for the first time.
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Affiliation(s)
- Anna A Gryadunova
- Laboratory for Biotechnological Research 3D Bioprinting Solutions, Moscow 115409, Russian Federation; Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, Moscow 119991, Russian Federation.
| | - Elizaveta V Koudan
- Laboratory for Biotechnological Research 3D Bioprinting Solutions, Moscow 115409, Russian Federation.
| | - Sergey A Rodionov
- N.N. Priorov National Medical Research Center of Traumatology and Orthopedics, Moscow 127299, Russian Federation
| | - F D A S Pereira
- Laboratory for Biotechnological Research 3D Bioprinting Solutions, Moscow 115409, Russian Federation
| | - Nina Yu Meteleva
- I.D. Papanin Institute for Biology of Inland Waters RAS, Borok 152742, Russian Federation
| | - Vladimir A Kasyanov
- Riga Stradins University, Riga LV-1007, Latvia; Riga Technical University, Riga LV-1658, Latvia
| | - Vladislav A Parfenov
- Laboratory for Biotechnological Research 3D Bioprinting Solutions, Moscow 115409, Russian Federation
| | - Alexey V Kovalev
- N.N. Priorov National Medical Research Center of Traumatology and Orthopedics, Moscow 127299, Russian Federation
| | - Yusef D Khesuani
- Laboratory for Biotechnological Research 3D Bioprinting Solutions, Moscow 115409, Russian Federation
| | - Vladimir A Mironov
- Laboratory for Biotechnological Research 3D Bioprinting Solutions, Moscow 115409, Russian Federation; Institute for Regenerative Medicine, I.M. Sechenov First Moscow State Medical University, Moscow 119991, Russian Federation
| | - Elena A Bulanova
- Laboratory for Biotechnological Research 3D Bioprinting Solutions, Moscow 115409, Russian Federation.
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58
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Kaus‐Drobek M, Mücke N, Szczepanowski RH, Wedig T, Czarnocki‐Cieciura M, Polakowska M, Herrmann H, Wysłouch‐Cieszyńska A, Dadlez M. Vimentin S-glutathionylation at Cys328 inhibits filament elongation and induces severing of mature filaments in vitro. FEBS J 2020; 287:5304-5322. [PMID: 32255262 PMCID: PMC7818121 DOI: 10.1111/febs.15321] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 02/17/2020] [Accepted: 03/31/2020] [Indexed: 12/26/2022]
Abstract
Vimentin intermediate filaments are a significant component of the cytoskeleton in cells of mesenchymal origin. In vivo, filaments assemble and disassemble and thus participate in the dynamic processes of the cell. Post-translational modifications (PTMs) such as protein phosphorylation regulate the multiphasic association of vimentin from soluble complexes to insoluble filaments and the reverse processes. The thiol side chain of the single vimentin cysteine at position 328 (Cys328) is a direct target of oxidative modifications inside cells. Here, we used atomic force microscopy, electron microscopy and a novel hydrogen-deuterium exchange mass spectrometry (HDex-MS) procedure to investigate the structural consequences of S-nitrosylation and S-glutathionylation of Cys328 for in vitro oligomerisation of human vimentin. Neither modification affects the lateral association of tetramers to unit-length filaments (ULF). However, S-glutathionylation of Cys328 blocks the longitudinal assembly of ULF into extended filaments. S-nitrosylation of Cys328 does not hinder but slows down the elongation. Likewise, S-glutathionylation of preformed vimentin filaments causes their extensive fragmentation to smaller oligomeric species. Chemical reduction of the S-glutathionylated Cys328 thiols induces reassembly of the small fragments into extended filaments. In conclusion, our in vitro results suggest S-glutathionylation as a candidate PTM for an efficient molecular switch in the dynamic rearrangements of vimentin intermediate filaments, observed in vivo, in response to changes in cellular redox status. Finally, we demonstrate that HDex-MS is a powerful method for probing the kinetics of vimentin filament formation and filament disassembly induced by PTMs.
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Affiliation(s)
- Magdalena Kaus‐Drobek
- Laboratory of Mass SpectrometryInstitute of Biochemistry and BiophysicsPolish Academy of SciencesWarsawPoland
| | - Norbert Mücke
- Biophysics of MacromoleculesGerman Cancer Research Center (DKFZ)HeidelbergGermany
- Chromatin NetworksGerman Cancer Research Center (DKFZ)HeidelbergGermany
| | - Roman H. Szczepanowski
- Biophysics Core FacilityInternational Institute of Molecular and Cell BiologyWarsawPoland
| | - Tatjana Wedig
- Biophysics of MacromoleculesGerman Cancer Research Center (DKFZ)HeidelbergGermany
| | | | - Magdalena Polakowska
- Laboratory of Mass SpectrometryInstitute of Biochemistry and BiophysicsPolish Academy of SciencesWarsawPoland
| | - Harald Herrmann
- Institute of NeuropathologyUniversity Hospital ErlangenGermany
- Division of Molecular GeneticsGerman Cancer Research Center (DKFZ)HeidelbergGermany
| | | | - Michał Dadlez
- Laboratory of Mass SpectrometryInstitute of Biochemistry and BiophysicsPolish Academy of SciencesWarsawPoland
- Biology DepartmentInstitute of Genetics and BiotechnologyWarsaw UniversityPoland
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59
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Morrow CS, Moore DL. Vimentin's side gig: Regulating cellular proteostasis in mammalian systems. Cytoskeleton (Hoboken) 2020; 77:515-523. [PMID: 33190414 DOI: 10.1002/cm.21645] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/05/2020] [Accepted: 11/09/2020] [Indexed: 02/06/2023]
Abstract
Intermediate filaments (IFs) perform a diverse set of well-known functions including providing structural support for the cell and resistance to mechanical stress, yet recent evidence has revealed unexpected roles for IFs as stress response proteins. Previously, it was shown that the type III IF protein vimentin forms cage-like structures around centrosome-associated proteins destined for degradation, structures referred to as aggresomes, suggesting a role for vimentin in protein turnover. However, vimentin's function at the aggresome has remained largely understudied. In a recent report, vimentin was shown to be dispensable for aggresome formation, but played a critical role in protein turnover at the aggresome through localizing proteostasis-related machineries, such as proteasomes, to the aggresome. Here, we review evidence for vimentin's function in proteostasis and highlight the organismal implications of these findings.
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Affiliation(s)
- Christopher S Morrow
- Department of Neuroscience, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Darcie L Moore
- Department of Neuroscience, University of Wisconsin-Madison, Madison, Wisconsin, USA
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60
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Withaferin A activates TRIM16 for its anti-cancer activity in melanoma. Sci Rep 2020; 10:19724. [PMID: 33184347 PMCID: PMC7665169 DOI: 10.1038/s41598-020-76722-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 10/29/2020] [Indexed: 02/07/2023] Open
Abstract
Although selective BRAF inhibitors and novel immunotherapies have improved short-term treatment responses in metastatic melanoma patients, acquired resistance to these therapeutics still represent a major challenge in clinical practice. In this study, we evaluated the efficacy of Withaferin A (WFA), derived from the medicinal plant Withania Somnifera, as a novel therapeutic agent for the treatment of melanoma. WFA showed selective toxicity to melanoma cells compared to non-malignant cells. WFA induced apoptosis, significantly reduced cell proliferation and inhibited migration of melanoma cells. We identified that repression of the tumour suppressor TRIM16 diminished WFA cytotoxicity, suggesting that TRIM16 was in part responsible for the cytotoxic effects of WFA in melanoma cells. Together our data indicates that WFA has potent cytopathic effects on melanoma cells through TRIM16, suggesting a potential therapeutic application of WFA in the disease.
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61
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Tackling Chronic Inflammation with Withanolide Phytochemicals-A Withaferin a Perspective. Antioxidants (Basel) 2020; 9:antiox9111107. [PMID: 33182809 PMCID: PMC7696210 DOI: 10.3390/antiox9111107] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 02/07/2023] Open
Abstract
Chronic inflammatory diseases are considered to be one of the biggest threats to human health. Most prescribed pharmaceutical drugs aiming to treat these diseases are characterized by side-effects and negatively affect therapy adherence. Finding alternative treatment strategies to tackle chronic inflammation has therefore been gaining interest over the last few decades. In this context, Withaferin A (WA), a natural bioactive compound isolated from Withania somnifera, has been identified as a promising anti-cancer and anti-inflammatory compound. Although the majority of studies focus on the molecular mechanisms of WA in cancer models, recent evidence demonstrates that WA also holds promise as a new phytotherapeutic agent against chronic inflammatory diseases. By targeting crucial inflammatory pathways, including nuclear factor kappa B (NF-κB) and nuclear factor erythroid 2 related factor 2 (Nrf2) signaling, WA suppresses the inflammatory disease state in several in vitro and preclinical in vivo models of diabetes, obesity, neurodegenerative disorders, cystic fibrosis and osteoarthritis. This review provides a concise overview of the molecular mechanisms by which WA orchestrates its anti-inflammatory effects to restore immune homeostasis.
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62
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Roy S, Kapoor A, Zhu F, Mukhopadhyay R, Ghosh AK, Lee H, Mazzone J, Posner GH, Arav-Boger R. Artemisinins target the intermediate filament protein vimentin for human cytomegalovirus inhibition. J Biol Chem 2020; 295:15013-15028. [PMID: 32855235 DOI: 10.1074/jbc.ra120.014116] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 08/24/2020] [Indexed: 01/02/2023] Open
Abstract
The antimalarial agents artemisinins inhibit cytomegalovirus (CMV) in vitro and in vivo, but their target(s) has been elusive. Using a biotin-labeled artemisinin, we identified the intermediate filament protein vimentin as an artemisinin target, validated by detailed biochemical and biological assays. We provide insights into the dynamic and unique modulation of vimentin, depending on the stage of human CMV (HCMV) replication. In vitro, HCMV entry and viral progeny are reduced in vimentin-deficient fibroblasts, compared with control cells. Similarly, mouse CMV (MCMV) replication in vimentin knockout mice is significantly reduced compared with controls in vivo, confirming the requirement of vimentin for establishment of infection. Early after HCMV infection of human foreskin fibroblasts vimentin level is stable, but as infection proceeds, vimentin is destabilized, concurrent with its phosphorylation and virus-induced calpain activity. Intriguingly, in vimentin-overexpressing cells, HCMV infection is reduced compared with control cells. Binding of artesunate, an artemisinin monomer, to vimentin prevents virus-induced vimentin degradation, decreasing vimentin phosphorylation at Ser-55 and Ser-83 and resisting calpain digestion. In vimentin-deficient fibroblasts, the anti-HCMV activity of artesunate is reduced compared with controls. In summary, an intact and stable vimentin network is important for the initiation of HCMV replication but hinders its completion. Artesunate binding to vimentin early during infection stabilizes it and antagonizes subsequent HCMV-mediated vimentin destabilization, thus suppressing HCMV replication. Our target discovery should enable the identification of vimentin-binding sites and compound moieties for binding.
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Affiliation(s)
- Sujayita Roy
- Department of Pediatrics, Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Arun Kapoor
- Department of Pediatrics, Division of Infectious Diseases, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Fei Zhu
- Department of Pediatrics, Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Rupkatha Mukhopadhyay
- Department of Pediatrics, Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Ayan Kumar Ghosh
- Department of Pediatrics, Division of Infectious Diseases, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Hyun Lee
- Center for Biomolecular Science and Department of Pharmaceutical Science, University of Illinois, Chicago, Illinois, USA
| | - Jennifer Mazzone
- Department of Chemistry, School of Arts and Sciences, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Gary H Posner
- Department of Chemistry, School of Arts and Sciences, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Ravit Arav-Boger
- Department of Pediatrics, Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Pediatrics, Division of Infectious Diseases, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
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63
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Pharmacological Potential of Small Molecules for Treating Corneal Neovascularization. Molecules 2020; 25:molecules25153468. [PMID: 32751576 PMCID: PMC7435801 DOI: 10.3390/molecules25153468] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 07/28/2020] [Accepted: 07/28/2020] [Indexed: 12/19/2022] Open
Abstract
Under healthy conditions, the cornea is an avascular structure which allows for transparency and optimal visual acuity. Its avascular nature is maintained by a balance of proangiogenic and antiangiogenic factors. An imbalance of these factors can result in abnormal blood vessel proliferation into the cornea. This corneal neovascularization (CoNV) can stem from a variety of insults including hypoxia and ocular surface inflammation caused by trauma, infection, chemical burns, and immunological diseases. CoNV threatens corneal transparency, resulting in permanent vision loss. Mainstay treatments of CoNV have partial efficacy and associated side effects, revealing the need for novel treatments. Numerous natural products and synthetic small molecules have shown potential in preclinical studies in vivo as antiangiogenic therapies for CoNV. Such small molecules include synthetic inhibitors of the vascular endothelial growth factor (VEGF) receptor and other tyrosine kinases, plus repurposed antimicrobials, as well as natural source-derived flavonoid and non-flavonoid phytochemicals, immunosuppressants, vitamins, and histone deacetylase inhibitors. They induce antiangiogenic and anti-inflammatory effects through inhibition of VEGF, NF-κB, and other growth factor receptor pathways. Here, we review the potential of small molecules, both synthetics and natural products, targeting these and other molecular mechanisms, as antiangiogenic agents in the treatment of CoNV.
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Hahm ER, Kim SH, Singh KB, Singh K, Singh SV. A Comprehensive Review and Perspective on Anticancer Mechanisms of Withaferin A in Breast Cancer. Cancer Prev Res (Phila) 2020; 13:721-734. [PMID: 32727824 DOI: 10.1158/1940-6207.capr-20-0259] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 06/23/2020] [Accepted: 07/22/2020] [Indexed: 01/07/2023]
Abstract
Withaferin A (hereafter abbreviated as WA) is a promising anticancer steroidal lactone abundant in a medicinal plant (Withania somnifera) native to Asia. The root/leaf extract of Withania somnifera, which belongs to the Solanaceae family, continues to be included in the Ayurvedic medicine formulations of alternative medicine practice. Numerous chemicals are detectable in the root/leaf extract of Withania somnifera [e.g., withanolides (WA, withanone, withanolide A, etc.), alkaloids, sitoindosides, etc.], but the anticancer effect of this medicinal plant is largely attributed to WA. Anticancer effect of WA was initially reported in the early 70s in the Ehrlich ascites tumor cell model in vitro Since then, numerous preclinical studies have been performed using cellular and animal models of different cancers including breast cancer to determine cancer therapeutic and chemopreventive effects of WA. Chemoprevention, a word first introduced by Dr. Michael B. Sporn, was intended to impede, arrest, or reverse carcinogenesis at its earliest stages with pharmacologic agents. This review succinctly summarizes the published findings on anticancer pharmacology of WA in breast cancer focusing on pharmacokinetic behavior, in vivo efficacy data in preclinical models in a therapeutic and chemoprevention settings, and its known effects on cancer-relevant cellular processes (e.g., growth arrest, apoptosis induction, autophagy, metabolic adaptation, immune function, etc.) and molecular targets (e.g., suppression of oncogenes such as estrogen receptor-α, STAT3, etc.). Potential gaps in knowledge as well as future research directions essential for clinical development of WA for chemoprevention and/or treatment of breast cancer are also discussed.
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Affiliation(s)
- Eun-Ryeong Hahm
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Su-Hyeong Kim
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Krishna B Singh
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Kamayani Singh
- UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Shivendra V Singh
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania. .,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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Type III intermediate filaments as targets and effectors of electrophiles and oxidants. Redox Biol 2020; 36:101582. [PMID: 32711378 PMCID: PMC7381704 DOI: 10.1016/j.redox.2020.101582] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 05/05/2020] [Accepted: 05/13/2020] [Indexed: 12/20/2022] Open
Abstract
Intermediate filaments (IFs) play key roles in cell mechanics, signaling and homeostasis. Their assembly and dynamics are finely regulated by posttranslational modifications. The type III IFs, vimentin, desmin, peripherin and glial fibrillary acidic protein (GFAP), are targets for diverse modifications by oxidants and electrophiles, for which their conserved cysteine residue emerges as a hot spot. Pathophysiological examples of these modifications include lipoxidation in cell senescence and rheumatoid arthritis, disulfide formation in cataracts and nitrosation in endothelial shear stress, although some oxidative modifications can also be detected under basal conditions. We previously proposed that cysteine residues of vimentin and GFAP act as sensors for oxidative and electrophilic stress, and as hinges influencing filament assembly. Accumulating evidence indicates that the structurally diverse cysteine modifications, either per se or in combination with other posttranslational modifications, elicit specific functional outcomes inducing distinct assemblies or network rearrangements, including filament stabilization, bundling or fragmentation. Cysteine-deficient mutants are protected from these alterations but show compromised cellular performance in network assembly and expansion, organelle positioning and aggresome formation, revealing the importance of this residue. Therefore, the high susceptibility to modification of the conserved cysteine of type III IFs and its cornerstone position in filament architecture sustains their role in redox sensing and integration of cellular responses. This has deep pathophysiological implications and supports the potential of this residue as a drug target. Type III intermediate filaments can be modified by many oxidants and electrophiles. Oxidative modifications of type III IFs occur in normal and pathological conditions. The conserved cysteine residue acts as a hub for redox/electrophilic modifications. Cysteine modifications elicit structure-dependent type III IF rearrangements. Type III intermediate filaments act as sensors for oxidative and electrophilic stress.
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Sivasankarapillai VS, Madhu Kumar Nair R, Rahdar A, Bungau S, Zaha DC, Aleya L, Tit DM. Overview of the anticancer activity of withaferin A, an active constituent of the Indian ginseng Withania somnifera. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:26025-26035. [PMID: 32405942 DOI: 10.1007/s11356-020-09028-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/22/2020] [Indexed: 06/11/2023]
Abstract
Cancer is still considered a "hopeless case", besides all of the advancements in oncology research. On the other hand, the natural products, as effective lead molecules, have gained significant interest for research due to the absence of toxic and harmful side effects usually associated with conventional treatment methods. Medicinal properties of herbal plants are strongly evidenced in traditional medicine from ancient times. In the context above, withaferin A (WA) was identified as the active principle of the plant Withania somnifera, its molecule being reported to have excellent anticancer and tumour inhibition activities in various cell lines. Furthermore, the in silico approaches in the medicinal chemistry of WA revealed the biological targets and gave momentum for the research that leads to many amazing pharmacological activities of WA which are not yet explored. This includes a broad spectrum of anticancer actions manifested in different organs (breast, pancreas, colon), melanoma and B cell lymphoma, etc. This review is an extensive survey of the most recent anticancer studies reported for WA, along with its mechanism of action and details about its in vitro and/or in vivo behaviour.
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Affiliation(s)
| | | | - Abbas Rahdar
- Department of Physics, Faculty of Science,, University of Zabol, Zabol, Iran
| | - Simona Bungau
- Department of Pharmacy, Faculty of Medicine and Pharmacy,, University of Oradea, 410028, Oradea, Romania
| | - Dana Carmen Zaha
- Department of Preclinical Disciplines, Faculty of Medicine and Pharmacy,, University of Oradea, 410028, Oradea, Romania
| | - Lotfi Aleya
- Laboratoire Chrono-environnement CNRS 6249, Université de Franche-Comté, Besançon, France.
| | - Delia Mirela Tit
- Department of Pharmacy, Faculty of Medicine and Pharmacy,, University of Oradea, 410028, Oradea, Romania
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Ramos I, Stamatakis K, Oeste CL, Pérez-Sala D. Vimentin as a Multifaceted Player and Potential Therapeutic Target in Viral Infections. Int J Mol Sci 2020; 21:E4675. [PMID: 32630064 PMCID: PMC7370124 DOI: 10.3390/ijms21134675] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Revised: 06/28/2020] [Accepted: 06/29/2020] [Indexed: 12/17/2022] Open
Abstract
Vimentin is an intermediate filament protein that plays key roles in integration of cytoskeletal functions, and therefore in basic cellular processes such as cell division and migration. Consequently, vimentin has complex implications in pathophysiology. Vimentin is required for a proper immune response, but it can also act as an autoantigen in autoimmune diseases or as a damage signal. Although vimentin is a predominantly cytoplasmic protein, it can also appear at extracellular locations, either in a secreted form or at the surface of numerous cell types, often in relation to cell activation, inflammation, injury or senescence. Cell surface targeting of vimentin appears to associate with the occurrence of certain posttranslational modifications, such as phosphorylation and/or oxidative damage. At the cell surface, vimentin can act as a receptor for bacterial and viral pathogens. Indeed, vimentin has been shown to play important roles in virus attachment and entry of severe acute respiratory syndrome-related coronavirus (SARS-CoV), dengue and encephalitis viruses, among others. Moreover, the presence of vimentin in specific virus-targeted cells and its induction by proinflammatory cytokines and tissue damage contribute to its implication in viral infection. Here, we recapitulate some of the pathophysiological implications of vimentin, including the involvement of cell surface vimentin in interaction with pathogens, with a special focus on its role as a cellular receptor or co-receptor for viruses. In addition, we provide a perspective on approaches to target vimentin, including antibodies or chemical agents that could modulate these interactions to potentially interfere with viral pathogenesis, which could be useful when multi-target antiviral strategies are needed.
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Affiliation(s)
- Irene Ramos
- Department of Neurology and Center for Advanced Research on Diagnostic Assays, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA;
| | - Konstantinos Stamatakis
- Centro de Biología Molecular Severo Ochoa, UAM-CSIC. Nicolás Cabrera, 1, Campus de la Universidad Autónoma de Madrid, 28049 Madrid, Spain; (K.S.); (C.L.O.)
| | - Clara L. Oeste
- Centro de Biología Molecular Severo Ochoa, UAM-CSIC. Nicolás Cabrera, 1, Campus de la Universidad Autónoma de Madrid, 28049 Madrid, Spain; (K.S.); (C.L.O.)
| | - Dolores Pérez-Sala
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas Margarita Salas, CSIC, Ramiro de Maeztu, 9, 28040 Madrid, Spain
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Keeling MC, Gavara N. Withaferin-A Can Be Used to Modulate the Keratin Network of Intermediate Filaments in Human Epidermal Keratinocytes. Int J Mol Sci 2020; 21:ijms21124450. [PMID: 32585813 PMCID: PMC7352337 DOI: 10.3390/ijms21124450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 12/22/2022] Open
Abstract
The mechanical state of cells is a critical part of their healthy functioning and it is controlled primarily by cytoskeletal networks (actin, microtubules and intermediate filaments). Drug-based strategies targeting the assembly of a given cytoskeletal network are often used to pinpoint their role in cellular function. Unlike actin and microtubules, there has been limited interest in the role of intermediate filaments, and fewer drugs have thus been identified and characterised as modulators of its assembly. Here, we evaluate whether Withaferin-A (WFA), an established disruptor of vimentin filaments, can also be used to modulate keratin filament assembly. Our results show that in keratinocytes, which are keratin-rich but vimentin-absent, Withaferin-A disrupts keratin filaments. Importantly, the dosages required are similar to those previously reported to disrupt vimentin in other cell types. Furthermore, Withaferin-A-induced keratin disassembly is accompanied by changes in cell stiffness and migration. Therefore, we propose that WFA can be repurposed as a useful drug to disrupt the keratin cytoskeleton in epithelial cells.
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Mehta V, Chander H, Munshi A. Mechanisms of Anti-Tumor Activity of Withania somnifera (Ashwagandha). Nutr Cancer 2020; 73:914-926. [PMID: 33949906 DOI: 10.1080/01635581.2020.1778746] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Increasing herbal formulations have been used to treat several diseases including cancer. W. somnifera (Ashwagandha) is one such plant the extracts of which have been tested against a number of ailments including cancer, which remains as one of the most dreadful diseases on the globe. The ever-increasing number of cancer related mortality demands the development of novel chemopreventive agents with minimum side effects. Different compounds isolated from various parts of the plant like root, stem, and leaves have been reported to display significant anti-cancerous and immunomodulating properties and thus can be used alone or in combination with other chemotherapeutic drugs for cancer treatment. Through this review, we highlight the importance of W. somnifera in countering the potential oncogenic signaling mediators that are modulated by active constituents of W. somnifera in a variety of cancer types. Further, we hope that active constituents of W. somnifera will be tested in clinical trials so that they can be used as an important adjuvant in the near future for the effective treatment of cancer.
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Affiliation(s)
- Vikrant Mehta
- Department of Human Genetics and Molecular Medicine, Central University of Punjab, Bathinda, Punjab, India
| | - Harish Chander
- National Institute of Biologicals, Noida, Uttar Pradesh, India
| | - Anjana Munshi
- Department of Human Genetics and Molecular Medicine, Central University of Punjab, Bathinda, Punjab, India
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70
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Batth IS, Li S. Discovery of Cell-Surface Vimentin (CSV) as a Sarcoma Target and Development of CSV-Targeted IL12 Immune Therapy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1257:169-178. [PMID: 32483739 DOI: 10.1007/978-3-030-43032-0_14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
This chapter discusses a novel target of osteosarcoma (OS), cell-surface vimentin (CSV), and a novel generation of interleukin-12 (IL12), CSV-targeted IL12, for treating OS tumor metastasis. Vimentin is a known intracellular structural protein for mesenchymal cells but is also documented in tumor cells. Our recent study definitively revealed that vimentin can be translocated to the surface of very aggressive tumor cells, such as metastatic cells. This CSV property allows investigators to capture circulating tumor cells (CTCs) across any type of tumor, including OS. CTCs are known as the seeds of metastasis; therefore, targeting these cells using CSV is a logical approach for use in a metastatic OS setting. Interestingly, we found that the peptide VNTANST can bind to CSV when fused to the p40 subunit encoding the DNA of IL12. Systemic delivery of this CSV-targeted IL12 immune therapy inhibited OS metastasis and relapse in a mouse tumor model as detailed in this chapter. This CSV-targeted delivery of IL12 also reduced toxicity of IL12. In summary, this chapter details a novel approach for safe IL12 immune therapy via targeting CSV.
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Affiliation(s)
- Izhar S Batth
- The University of Texas MD Anderson Cancer Center, Department of Pediatrics - Research, Houston, TX, USA
| | - Shulin Li
- The University of Texas MD Anderson Cancer Center, Department of Pediatrics - Research, Houston, TX, USA.
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Chen X, Wang Y, Ma N, Tian J, Shao Y, Zhu B, Wong YK, Liang Z, Zou C, Wang J. Target identification of natural medicine with chemical proteomics approach: probe synthesis, target fishing and protein identification. Signal Transduct Target Ther 2020; 5:72. [PMID: 32435053 PMCID: PMC7239890 DOI: 10.1038/s41392-020-0186-y] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 12/14/2022] Open
Abstract
Natural products are an important source of new drugs for the treatment of various diseases. However, developing natural product-based new medicines through random moiety modification is a lengthy and costly process, due in part to the difficulties associated with comprehensively understanding the mechanism of action and the side effects. Identifying the protein targets of natural products is an effective strategy, but most medicines interact with multiple protein targets, which complicate this process. In recent years, an increasing number of researchers have begun to screen the target proteins of natural products with chemical proteomics approaches, which can provide a more comprehensive array of the protein targets of active small molecules in an unbiased manner. Typically, chemical proteomics experiments for target identification consist of two key steps: (1) chemical probe design and synthesis and (2) target fishing and identification. In recent decades, five different types of chemical proteomic probes and their respective target fishing methods have been developed to screen targets of molecules with different structures, and a variety of protein identification approaches have been invented. Presently, we will classify these chemical proteomics approaches, the application scopes and characteristics of the different types of chemical probes, the different protein identification methods, and the advantages and disadvantages of these strategies.
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Affiliation(s)
- Xiao Chen
- School of Medicine & Holistic Integrative Medicine, and College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
- School of Biopharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Yutong Wang
- School of Medicine & Holistic Integrative Medicine, and College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Nan Ma
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
| | - Jing Tian
- School of Medicine & Holistic Integrative Medicine, and College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yurou Shao
- School of Medicine & Holistic Integrative Medicine, and College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Bo Zhu
- School of Medicine & Holistic Integrative Medicine, and College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, China
- School of Biopharmacy, China Pharmaceutical University, Nanjing, 210009, China
| | - Yin Kwan Wong
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China
- The First Affiliated Hospital of Southern University of Science and Technology, The Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, China
| | - Zhen Liang
- The First Affiliated Hospital of Southern University of Science and Technology, The Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, China.
| | - Chang Zou
- The First Affiliated Hospital of Southern University of Science and Technology, The Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, China.
| | - Jigang Wang
- Artemisinin Research Center, and Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, China.
- The First Affiliated Hospital of Southern University of Science and Technology, The Second Clinical Medical College of Jinan University, Shenzhen People's Hospital, Shenzhen, 518020, China.
- Department of Toxicology, School of Public Health, Guangxi Medical University, Nanning, 530021, China.
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Epoxide containing molecules: A good or a bad drug design approach. Eur J Med Chem 2020; 201:112327. [PMID: 32526552 DOI: 10.1016/j.ejmech.2020.112327] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 04/06/2020] [Accepted: 04/08/2020] [Indexed: 12/13/2022]
Abstract
Functional group modification is one of the main strategies used in drug discovery and development. Despite the controversy of being identified for many years as a biologically hazardous functional group, the introduction of an epoxide function in a structural backbone is still one of the possible modifications being implemented in drug design. In this manner, it is our intention to prove with this work that epoxides can have significant interest in medicinal chemistry, not only as anticancer agents, but also as important drugs for other pathologies. Thus, this revision paper aims to highlight the biological activity and the proposed mechanisms of action of several epoxide-containing molecules either in preclinical studies or in clinical development or even in clinical use. An overview of the chemistry of epoxides is also reported. Some of the conclusions are that effectively most of the epoxide-containing molecules referred in this work were being studied or are in the market as anticancer drugs. However, some of them in preclinical studies, were also associated with other different activities such as anti-malarial, anti-arthritic, insecticidal, antithrombotic, and selective inhibitory activity of FXIII-A (a transglutaminase). As for the epoxide-containing molecules in clinical trials, some of them are being tested for obesity and schizophrenia. Finally, drugs containing epoxide groups already in the market are mostly used for the treatment of different types of cancer, such as breast cancer and multiple myeloma. Other diseases for which the referred drugs are being used include heart failure, infections and gastrointestinal disturbs. In summary, epoxides can be a suitable option in drug design, particularly in the design of anticancer agents, and deserve to be better explored. However, and despite the promising results, it is imperative to explore the mechanisms of action of these compounds in order to have a better picture of their efficiency and safety.
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Risinger AL, Du L. Targeting and extending the eukaryotic druggable genome with natural products: cytoskeletal targets of natural products. Nat Prod Rep 2020; 37:634-652. [PMID: 31764930 PMCID: PMC7797185 DOI: 10.1039/c9np00053d] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Covering: 2014-2019We review recent progress on natural products that target cytoskeletal components, including microtubules, actin, intermediate filaments, and septins and highlight their demonstrated and potential utility in the treatment of human disease. The anticancer efficacy of microtubule targeted agents identified from plants, microbes, and marine organisms is well documented. We highlight new microtubule targeted agents currently in clinical evaluations for the treatment of drug resistant cancers and the accumulating evidence that the anticancer efficacy of these agents is not solely due to their antimitotic effects. Indeed, the effects of microtubule targeted agents on interphase microtubules are leading to their potential for more mechanistically guided use in cancers as well as neurological disease. The discussion of these agents as more targeted drugs also prompts a reevaluation of our thinking about natural products that target other components of the cytoskeleton. For instance, actin active natural products are largely considered chemical probes and non-selective toxins. However, studies utilizing these probes have uncovered aspects of actin biology that can be more specifically targeted to potentially treat cancer, neurological disorders, and infectious disease. Compounds that target intermediate filaments and septins are understudied, but their continued discovery and mechanistic evaluations have implications for numerous therapeutic indications.
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Affiliation(s)
- April L Risinger
- The University of Texas Health Science Center at San Antonio, Department of Pharmacology, 7703 Floyd Curl Drive, San Antonio, Texas 78229, USA.
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Xia B, Zhang H, Yang M, Du S, Wei J, Ding L. Leukamenin E Induces K8/18 Phosphorylation and Blocks the Assembly of Keratin Filament Networks Through ERK Activation. Int J Mol Sci 2020; 21:ijms21093164. [PMID: 32365802 PMCID: PMC7246489 DOI: 10.3390/ijms21093164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/25/2020] [Accepted: 04/28/2020] [Indexed: 11/16/2022] Open
Abstract
Leukamenin E is a natural ent-kaurane diterpenoid isolated from Isodon racemosa (Hemsl) Hara that has been found to be a novel and potential keratin filament inhibitor, but its underlying mechanisms remain largely unknown. Here, we show that leukamenin E induces keratin filaments (KFs) depolymerization, largely independently of microfilament (MFs) and microtubules (MTs) in well-spread cells and inhibition of KFs assembly in spreading cells. These effects are accompanied by keratin phosphorylation at K8-Ser73/Ser431 and K18-Ser52 via the by extracellular signal-regulated kinases (ERK) pathway in primary liver carcinoma cells (PLC) and human umbilical vein endothelial cells (HUVECs). Moreover, leukamenin E increases soluble pK8-Ser73/Ser431, pK18-Ser52, and pan-keratin in the cytoplasmic supernatant by immunofluorescence imaging and Western blotting assay. Accordingly, leukamenin E inhibits the spreading and migration of cells. We propose that leukamenin E-induced keratin phosphorylation may interfere with the initiation of KFs assembly and block the formation of a new KFs network, leading to the inhibition of cell spreading. Leukamenin E is a potential target drug for inhibition of KFs assembly.
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Hassannia B, Logie E, Vandenabeele P, Vanden Berghe T, Vanden Berghe W. Withaferin A: From ayurvedic folk medicine to preclinical anti-cancer drug. Biochem Pharmacol 2020; 173:113602. [DOI: 10.1016/j.bcp.2019.08.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 08/05/2019] [Indexed: 12/26/2022]
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Kim SH, Singh KB, Hahm ER, Lokeshwar BL, Singh SV. Withania somnifera root extract inhibits fatty acid synthesis in prostate cancer cells. J Tradit Complement Med 2020; 10:188-197. [PMID: 32670813 PMCID: PMC7340880 DOI: 10.1016/j.jtcme.2020.02.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 01/07/2023] Open
Abstract
Prior research argues for a role of increased de novo fatty acid synthesis in pathogenesis of prostate adenocarcinoma, which remains a leading cause of cancer-associated mortality in American men. A safe and effective inhibitor of fatty acid synthesis is still a clinically unmet need. Herein, we investigated the effect of ethanol extract of Withania somnifera root (WRE) standardized for one of its components (withaferin A) on fatty acid synthesis using LNCaP and 22Rv1 human prostate cancer cells. Withania somnifera is a medicinal plant used in the Ayurvedic medicine practiced in India. Western blotting and confocal microscopy revealed a statistically significant decrease in protein levels of key fatty acid metabolism enzymes including ATP citrate lyase (ACLY), acetyl-CoA carboxylase 1 (ACC1), fatty acid synthase (FASN), and carnitine palmitoyltransferase 1A (CPT1A) in WRE-treated cells compared with solvent control. The mRNA levels of ACLY, ACC1, FASN, and CPT1A were also lower in WRE-treated cells in comparison with control. Consequently, WRE treatment resulted in a significant decrease in intracellular levels of acetyl-CoA, total free fatty acids, and neutral lipid droplets in both LNCaP and 22Rv1 cells. WRE exhibited greater potency for fatty acid synthesis inhibition at equimolar concentration than cerulenin and etomoxir. Exposure to WRE results in downregulation of c-Myc and p-Akt(S473) proteins in 22Rv1 cell line. However, overexpression of only c-Myc conferred protection against clonogenic cell survival and lipogenesis inhibition by WRE. In conclusion, these results indicate that WRE is a novel inhibitor of fatty acid synthesis in human prostate cancer cells. Withania somnifera is a medicinal plant used in alternative medicine (Ayurvedic medicine) system practiced in India. Withania somnifera root extract exhibits a variety of pharmacological effects including anticancer activity. The present study reveals that Withania somnifera root extract is a potent inhibitor of lipogenesis in prostate cancer cells. Inhibition of lipogenesis seems to be a useful biomarker of anticancer efficacy of Withania somnifera in prostate cancer.
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Key Words
- ACC1, acetyl-CoA carboxylase 1
- ACLY, ATP citrate lyase
- ANOVA, one-way analysis of variance
- ATP citrate lyase
- Acetyl-CoA carboxylase 1
- CPT1A, carnitine palmitoyltransferase 1A
- CTCF, corrected total cell fluorescence
- Cer, cerulenin
- Chemoprevention
- Eto, etomoxir
- FASN, fatty acid synthase
- Fatty acid synthase
- GAPDH, glyceraldehyde 3-phosphate dehydrogenase
- Prostate cancer
- Vec, pcDNA3 empty vector transfected cells
- WRE, Withania somnifera root extract
- caAkt, constitutively active Akt
- qRT-PCR, quantitative reverse transcription-polymerase chain reaction
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Affiliation(s)
- Su-Hyeong Kim
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Krishna B Singh
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Eun-Ryeong Hahm
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | | | - Shivendra V Singh
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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77
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Strouhalova K, Přechová M, Gandalovičová A, Brábek J, Gregor M, Rosel D. Vimentin Intermediate Filaments as Potential Target for Cancer Treatment. Cancers (Basel) 2020; 12:E184. [PMID: 31940801 PMCID: PMC7017239 DOI: 10.3390/cancers12010184] [Citation(s) in RCA: 130] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/08/2020] [Accepted: 01/09/2020] [Indexed: 02/06/2023] Open
Abstract
Intermediate filaments constitute the third component of the cellular skeleton. Unlike actin and microtubule cytoskeletons, the intermediate filaments are composed of a wide variety of structurally related proteins showing distinct expression patterns in tissues and cell types. Changes in the expression patterns of intermediate filaments are often associated with cancer progression; in particular with phenotypes leading to increased cellular migration and invasion. In this review we will describe the role of vimentin intermediate filaments in cancer cell migration, cell adhesion structures, and metastasis formation. The potential for targeting vimentin in cancer treatment and the development of drugs targeting vimentin will be reviewed.
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Affiliation(s)
- Katerina Strouhalova
- Department of Cell Biology, Charles University, Viničná 7, 12843 Prague, Czech Republic; (K.S.); (A.G.); (J.B.)
- Biotechnology and Biomedicine Centre of the Academy of Sciences and Charles University (BIOCEV), Průmyslová 595, 25242 Vestec u Prahy, Czech Republic
| | - Magdalena Přechová
- Laboratory of Integrative Biology, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220 Prague, Czech Republic;
| | - Aneta Gandalovičová
- Department of Cell Biology, Charles University, Viničná 7, 12843 Prague, Czech Republic; (K.S.); (A.G.); (J.B.)
- Biotechnology and Biomedicine Centre of the Academy of Sciences and Charles University (BIOCEV), Průmyslová 595, 25242 Vestec u Prahy, Czech Republic
| | - Jan Brábek
- Department of Cell Biology, Charles University, Viničná 7, 12843 Prague, Czech Republic; (K.S.); (A.G.); (J.B.)
- Biotechnology and Biomedicine Centre of the Academy of Sciences and Charles University (BIOCEV), Průmyslová 595, 25242 Vestec u Prahy, Czech Republic
| | - Martin Gregor
- Laboratory of Integrative Biology, Institute of Molecular Genetics of the Czech Academy of Sciences, 14220 Prague, Czech Republic;
| | - Daniel Rosel
- Department of Cell Biology, Charles University, Viničná 7, 12843 Prague, Czech Republic; (K.S.); (A.G.); (J.B.)
- Biotechnology and Biomedicine Centre of the Academy of Sciences and Charles University (BIOCEV), Průmyslová 595, 25242 Vestec u Prahy, Czech Republic
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78
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Dom M, Vanden Berghe W, Van Ostade X. Broad-spectrum antitumor properties of Withaferin A: a proteomic perspective. RSC Med Chem 2020; 11:30-50. [PMID: 33479603 PMCID: PMC7523023 DOI: 10.1039/c9md00296k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 11/21/2019] [Indexed: 12/11/2022] Open
Abstract
The multifunctional antitumor properties of Withaferin A (WA), the manifold studied bioactive compound of the plant Withania somnifera, have been well established in many different in vitro and in vivo cancer models. This undoubtedly has led to a much better insight in the underlying mechanisms of WAs broad antitumor activity range, but also raises additional challenging questions on how all these antitumor properties could be explained on a molecular level. Therefore, a lot of effort was made to characterize the cellular WA target proteins, since these binding events will lead and initiate the observed downstream effects. Based on a proteomic perspective, this review provides novel insights in the molecular chain of events by which WA potentially exercises its antitumor activities. We illustrate that WA triggers multiple cellular stress pathways such as the NRF2-mediated oxidative stress response, the heat shock response and protein translation events and at the same time inhibits these cellular protection mechanisms, driving stressed cancer cells towards a fatal state of collapse. If cancer cells manage to restore homeostasis and survive, a stress-independent WA antitumor response comes into play. These include the known inhibition of cytoskeleton proteins, NFκB pathway inhibition and cell cycle inhibition, among others. This review therefore provides a comprehensive overview which integrates the numerous WA-protein binding partners to formulate a general WA antitumor mechanism.
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Affiliation(s)
- Martin Dom
- Laboratory of Protein Chemistry , Proteomics and Epigenetic Signalling (PPES) , Department of Biomedical Sciences , University of Antwerp (UA) , Universiteitsplein 1 , 2610 Wilrijk , Belgium . ; Tel: +3232562319
| | - Wim Vanden Berghe
- Laboratory of Protein Chemistry , Proteomics and Epigenetic Signalling (PPES) , Department of Biomedical Sciences , University of Antwerp (UA) , Universiteitsplein 1 , 2610 Wilrijk , Belgium . ; Tel: +3232562319
| | - Xaveer Van Ostade
- Laboratory of Protein Chemistry , Proteomics and Epigenetic Signalling (PPES) , Department of Biomedical Sciences , University of Antwerp (UA) , Universiteitsplein 1 , 2610 Wilrijk , Belgium . ; Tel: +3232562319
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79
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Wong KM, Song J, Saini V, Wong YH. Small Molecules as Drugs to Upregulate Metastasis Suppressors in Cancer Cells. Curr Med Chem 2019; 26:5876-5899. [PMID: 29788870 DOI: 10.2174/0929867325666180522090842] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/20/2018] [Accepted: 05/18/2018] [Indexed: 12/26/2022]
Abstract
It is well-recognized that the majority of cancer-related deaths is attributed to metastasis, which can arise from virtually any type of tumor. Metastasis is a complex multistep process wherein cancer cells must break away from the primary tumor, intravasate into the circulatory or lymphatic systems, extravasate, proliferate and eventually colonize secondary sites. Since these molecular processes involve the coordinated actions of numerous proteins, targeted disruptions of key players along these pathways represent possible therapeutic interventions to impede metastasis formation and reduce cancer mortality. A diverse group of proteins with demonstrated ability to inhibit metastatic colonization have been identified and they are collectively known as metastasis suppressors. Given that the metastasis suppressors are often downregulated in tumors, drug-induced re-expression or upregulation of these proteins represents a promising approach to limit metastasis. Indeed, over 40 compounds are known to exhibit efficacy in upregulating the expression of metastasis suppressors via transcriptional or post-transcriptional mechanisms, and the most promising ones are being evaluated for their translational potentials. These small molecules range from natural products to drugs in clinical use and they apparently target different molecular pathways, reflecting the diverse nature of the metastasis suppressors. In this review, we provide an overview of the different classes of compounds known to possess the ability to upregulate one or more metastasis suppressors, with an emphasis on their mechanisms of action and therapeutic potentials.
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Affiliation(s)
- Ka Ming Wong
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Jiaxing Song
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Vasu Saini
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Yung H Wong
- Division of Life Science and the Biotechnology Research Institute, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.,State Key Laboratory of Molecular Neuroscience, and the Molecular Neuroscience Center, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.,Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, HKUST Shenzhen Research Institute, Shenzhen, China
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80
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Chaudhary A, Kalra RS, Malik V, Katiyar SP, Sundar D, Kaul SC, Wadhwa R. 2, 3-Dihydro-3β-methoxy Withaferin-A Lacks Anti-Metastasis Potency: Bioinformatics and Experimental Evidences. Sci Rep 2019; 9:17344. [PMID: 31757995 PMCID: PMC6874665 DOI: 10.1038/s41598-019-53568-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/30/2019] [Indexed: 01/05/2023] Open
Abstract
Withaferin-A is a withanolide, predominantly present in Ashwagandha (Withania somnifera). It has been shown to possess anticancer activity in a variety of human cancer cells in vitro and in vivo. Molecular mechanism of such cytotoxicity has not yet been completely understood. Withaferin-A and Withanone were earlier shown to activate p53 tumor suppressor and oxidative stress pathways in cancer cells. 2,3-dihydro-3β-methoxy analogue of Withaferin-A (3βmWi-A) was shown to lack cytotoxicity and well tolerated at higher concentrations. It, on the other hand, protected normal cells against oxidative, chemical and UV stresses through induction of anti-stress and pro-survival signaling. We, in the present study, investigated the effect of Wi-A and 3βmWi-A on cell migration and metastasis signaling. Whereas Wi-A binds to vimentin and heterogeneous nuclear ribonucleoprotein K (hnRNP-K) with high efficacy and downregulates its effector proteins, MMPs and VEGF, involved in cancer cell metastasis, 3βmWi-A was ineffective. Consistently, Wi-A, and not 3βmWi-A, caused reduction in cytoskeleton proteins (Vimentin, N-Cadherin) and active protease (u-PA) that are essential for three key steps of cancer cell metastasis (EMT, increase in cell migration and invasion).
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Affiliation(s)
- Anupama Chaudhary
- DAILAB, DBT-AIST International Center for Translational & Environmental Research (DAICENTER), National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, 305 8565, Japan
| | - Rajkumar S Kalra
- DAILAB, DBT-AIST International Center for Translational & Environmental Research (DAICENTER), National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, 305 8565, Japan
| | - Vidhi Malik
- Department of Biochemical Engineering & Biotechnology, DAILAB, Indian Institute of Technology (IIT)-Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Shashank P Katiyar
- Department of Biochemical Engineering & Biotechnology, DAILAB, Indian Institute of Technology (IIT)-Delhi, Hauz Khas, New Delhi, 110 016, India
| | - Durai Sundar
- Department of Biochemical Engineering & Biotechnology, DAILAB, Indian Institute of Technology (IIT)-Delhi, Hauz Khas, New Delhi, 110 016, India.
| | - Sunil C Kaul
- DAILAB, DBT-AIST International Center for Translational & Environmental Research (DAICENTER), National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, 305 8565, Japan.
| | - Renu Wadhwa
- DAILAB, DBT-AIST International Center for Translational & Environmental Research (DAICENTER), National Institute of Advanced Industrial Science & Technology (AIST), Tsukuba, 305 8565, Japan.
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81
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Yang J, Yan W, Li Y, Niu L, Ye H, Chen L. The Natural Compound Withaferin A Covalently Binds to Cys239 of β-Tubulin to Promote Tubulin Degradation. Mol Pharmacol 2019; 96:711-719. [PMID: 31585985 DOI: 10.1124/mol.119.117812] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 09/28/2019] [Indexed: 02/05/2023] Open
Abstract
Withaferin A (WIT) is a natural product possessing a wide range of pharmacologic activities. Previous studies have reported covalent binding of WIT to tubulin and down-of tubulin protein levels although the underlying mechanisms remain to be established. In the current investigation, we showed that WIT induces down-regulation of tubulin in a post-transcriptional manner, suggestive of direct and potent activity in tubulin degradation. The N,N'-ethylene bis(iodoacetamide) assay and competitive binding experiments with four colchicine site-targeted tubulin inhibitors further revealed that WIT interacts with the colchicine site of tubulin to promote degradation. WIT irreversibly inhibited tubulin polymerization, and mass spectrometry results disclosed binding to cysteine at position 239 (Cys239) and Cys303 sites of β-tubulin. Interestingly, WIT promoted degradation of the β-tubulin isoforms containing Cys239 [β2, β4, and β5(β)] but had no effect on those containing Ser239 (β3 and β6). Moreover, a C239S but not C303S mutation in β-tubulin completely abolished the degradation effect of WIT, suggesting that the Cys239-WIT covalent bond accounts for this activity. Our collective results clearly demonstrate that covalent interactions between WIT and Cys239 of β-tubulin promote tubulin degradation, supporting its potential utility as a therapeutic compound. SIGNIFICANCE STATEMENT: Withaferin A, a natural product possessing a wide range of pharmacologic activities, covalently binds to Cys239 of β-tubulin near the colchicine site, and the WIT-Cys239 covalent bond accounts for WIT-induced tubulin degradation, fully clarifying the underlying mechanisms and supporting its potential utility a therapeutic compound.
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Affiliation(s)
- Jianhong Yang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University and Collaborative Innovation Center of Biotherapy and Cancer, Chengdu, People's Republic of China
| | - Wei Yan
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University and Collaborative Innovation Center of Biotherapy and Cancer, Chengdu, People's Republic of China
| | - Yong Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University and Collaborative Innovation Center of Biotherapy and Cancer, Chengdu, People's Republic of China
| | - Lu Niu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University and Collaborative Innovation Center of Biotherapy and Cancer, Chengdu, People's Republic of China
| | - Haoyu Ye
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University and Collaborative Innovation Center of Biotherapy and Cancer, Chengdu, People's Republic of China
| | - Lijuan Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital of Sichuan University and Collaborative Innovation Center of Biotherapy and Cancer, Chengdu, People's Republic of China
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82
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Peddakkulappagari CS, Saifi MA, Khurana A, Anchi P, Singh M, Godugu C. Withaferin A ameliorates renal injury due to its potent effect on inflammatory signaling. Biofactors 2019; 45:750-762. [PMID: 31188510 DOI: 10.1002/biof.1534] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 05/22/2019] [Indexed: 12/12/2022]
Abstract
Chronic kidney disease (CKD) is one of the major global health concerns and is responsible for end-stage renal disease (ESRD) complications. Inflammation plays a pivotal role in the progression of CKD. In the present study, we evaluated the renoprotective effects of a potent immunomodulator steroidal lactone, Withaferin A (WfA), in an animal model of renal injury (unilateral ureteral obstruction, UUO) and further investigated if the inhibition of inflammatory signaling can be a useful approach to reduce renal injury. Animals were randomly divided into five groups: Sham control, UUO control, WfA control, WfA low dose (1 mg/kg), and WfA high dose (3 mg/kg). Oxidative stress was measured by the estimation of reduced glutathione and lipid peroxidation levels. H&E and Picrosirius Red staining were performed to assess the extent of histological damage and collagen deposition. Furthermore, the molecular mechanism of the WfA effects was explored by immunohistochemistry, enzyme-linked immunosorbent assay, multiplex analysis of transforming growth factor β (TGF-β) pathway, and an array of inflammatory cytokines/chemokines. Interestingly, our pharmacological intervention significantly attenuated tissue collagen, inflammatory signaling, and macrophage signaling. WfA intervention abrogated the inflammatory signaling as evident from the modulated levels of chemokines and cytokines. The levels of TGF-β along with downstream signaling molecules were also attenuated by WfA treatment as revealed by inhibition in the expression of TGF-β1, TGF-β2, p-Smad2, p-Smad3, total Smad4, p-Akt, and p-ERK. We, to the best of our knowledge, prove for the first time that WfA has potential renoprotective activity against UUO-induced nephropathy due to its outstanding anti-inflammatory properties.
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Affiliation(s)
- Chandra S Peddakkulappagari
- Department of Regulatory Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Mohd A Saifi
- Department of Regulatory Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Amit Khurana
- Department of Regulatory Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Pratibha Anchi
- Department of Regulatory Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
| | - Mandip Singh
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, Florida
| | - Chandraiah Godugu
- Department of Regulatory Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Balanagar, Hyderabad, Telangana, India
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83
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Hahm ER, Lee J, Abella T, Singh SV. Withaferin A inhibits expression of ataxia telangiectasia and Rad3-related kinase and enhances sensitivity of human breast cancer cells to cisplatin. Mol Carcinog 2019; 58:2139-2148. [PMID: 31441116 DOI: 10.1002/mc.23104] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/06/2019] [Accepted: 08/06/2019] [Indexed: 12/26/2022]
Abstract
Ataxia telangiectasia and Rad3-related (ATR) is a serine/threonine-specific kinase that plays an important role in the maintenance of genomic integrity. In this study, we investigated the role of ATR in cell-cycle arrest by withaferin A (WA), a cancer preventative steroidal lactone derived from Withania somnifera plant abundant in India and surrounding countries. The WA treatment decreased the viability of MCF-7, MDA-MB-231, and SUM159 cells. Exposure of breast cancer cells to WA also resulted in suppression of protein level as well as phosphorylation of ATR and its downstream effector kinase (checkpoint kinase 1; CHK1). Both transcriptional and posttranscriptional mechanisms were involved in the WA-mediated downregulation of ATR protein. Downregulation of ATR protein expression resulting from WA exposure was not attenuated by overexpression of manganese superoxide dismutase. In contrast, the overexpression of CHK1 attenuated WA-mediated G2 /M arrest and augmented S10 phosphorylation of histone H3, a marker of mitotic arrest. The protein level of ATR was lowered by about 50% in breast tumors of WA-treated mouse mammary tumor virus-neu mice when compared with vehicle-treated controls but the difference was not significant due to small sample size. WA treatment sensitized MDA-MB-231 and SUM159 cells to growth inhibition and apoptosis induction by cisplatin. Cisplatin treatment resulted in increased autophosphorylation of ATR (T1989) and CHK1 (S345) phosphorylation that was markedly suppressed in the presence of WA. These results indicate that WA is an inhibitor of ATR in human breast cancer cells.
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Affiliation(s)
- Eun-Ryeong Hahm
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Joomin Lee
- Department of Food and Nutrition, Chosun University, Gwangju, South Korea
| | - Terric Abella
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
| | - Shivendra V Singh
- Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania.,UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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84
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Zhu W, Long JL, Yin YT, Guo HN, Jiang EP, Li YL, He QL, Zeng C, Sun YQ. MicroRNA-34a suppresses the invasion and migration of colorectal cancer cells by enhancing EGR1 and inhibiting vimentin. Exp Ther Med 2019; 18:2459-2466. [PMID: 31555358 PMCID: PMC6755272 DOI: 10.3892/etm.2019.7826] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 06/06/2019] [Indexed: 12/29/2022] Open
Abstract
MicroRNAs (miRNAs/miRs) are small non-coding RNAs that serve a post-transcriptional regulatory role in eukaryotes. Previous studies have demonstrated that the expression of miR-34a in colorectal cancer (CRC) tissues is decreased compared with that in normal colorectal tissues. However, the role of miR-34a in the invasion and metastasis of CRC remains unclear. In the present study, the levels of miR-34a expression were measured in various CRC cell lines. The cells were transfected with miR-34a mimics or inhibitors in order to assess the proliferation rate, and the colony forming, invasive and migratory abilities. Furthermore, the protein expression levels of vimentin and early growth response protein 1 (EGR1) were examined by western blot analysis. The results revealed that the expression of miR-34a was low in SW620, RKO, LoVo and Caco-2 cell lines and high in the SW480 and SW1116 cell lines. The migration, invasion and proliferation levels of SW480 cells were facilitated by decreasing the expression of miR-34a. Transient transfection with miR-34a mimics in SW620 cells caused a notable decrease in cell migration, invasion and proliferation levels compared with the control group, and a downregulation of vimentin and upregulation of EGR1 protein expression. The present study demonstrated that miR-34a was deregulated in a highly invasive CRC cell lines, and that it may attenuate the migratory, invasive and proliferative capabilities of CRC cells by enhancing the expression of EGR1 and inhibiting that of vimentin. The results of the present study represent important progress towards understanding the mechanisms of CRC recurrence and metastasis.
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Affiliation(s)
- Wei Zhu
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Jia-Li Long
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Yu-Ting Yin
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Hai-Na Guo
- Department of Pathology, Dongguan Maternal and Child Health Hospital, Dongguan, Guangdong 523002, P.R. China
| | - En-Ping Jiang
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Yu-Ling Li
- Department of Pathology, Dongguan Hospital of Southern Medical University, Dongguan, Guangdong 523059, P.R. China
| | - Qing-Lian He
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Chao Zeng
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
| | - Yan-Qin Sun
- Department of Pathology, Guangdong Medical University, Dongguan, Guangdong 523808, P.R. China
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85
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Hsu JHM, Chang PMH, Cheng TS, Kuo YL, Wu ATH, Tran TH, Yang YH, Chen JM, Tsai YC, Chu YS, Huang TH, Huang CYF, Lai JM. Identification of Withaferin A as a Potential Candidate for Anti-Cancer Therapy in Non-Small Cell Lung Cancer. Cancers (Basel) 2019; 11:cancers11071003. [PMID: 31319622 PMCID: PMC6678286 DOI: 10.3390/cancers11071003] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 07/15/2019] [Indexed: 12/21/2022] Open
Abstract
Low response rate and recurrence are common issues in lung cancer; thus, identifying a potential compound for these patients is essential. Utilizing an in silico screening method, we identified withaferin A (WA), a cell-permeable steroidal lactone initially extracted from Withania somnifera, as a potential anti-lung cancer and anti-lung cancer stem-like cell (CSC) agent. First, we demonstrated that WA exhibited potent cytotoxicity in several lung cancer cells, as evidenced by low IC50 values. WA concurrently induced autophagy and apoptosis and the activation of reactive oxygen species (ROS), which plays an upstream role in mediating WA-elicited effects. The increase in p62 indicated that WA may modulate the autophagy flux followed by apoptosis. In vivo research also demonstrated the anti-tumor effect of WA treatment. We subsequently demonstrated that WA could inhibit the growth of lung CSCs, decrease side population cells, and inhibit lung cancer spheroid-forming capacity, at least through downregulation of mTOR/STAT3 signaling. Furthermore, the combination of WA and chemotherapeutic drugs, including cisplatin and pemetrexed, exerted synergistic effects on the inhibition of epidermal growth factor receptor (EGFR) wild-type lung cancer cell viability. In addition, WA can further enhance the cytotoxic effect of cisplatin in lung CSCs. Therefore, WA alone or in combination with standard chemotherapy is a potential treatment option for EGFR wild-type lung cancer and may decrease the occurrence of cisplatin resistance by inhibiting lung CSCs.
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Affiliation(s)
- Jade H-M Hsu
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei 112, Taiwan
| | - Peter M-H Chang
- Division of Medical Oncology, Department of Oncology, Taipei Veterans General Hospital, Taipei 112, Taiwan
- Faculty of Medicine, National Yang-Ming University, Taipei 112, Taiwan
| | - Tai-Shan Cheng
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei 112, Taiwan
| | - Yu-Lun Kuo
- Department of Computer Science and Information Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Alexander T-H Wu
- The PhD Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan
| | - Thu-Ha Tran
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei 112, Taiwan
- Taiwan International Graduate Program in Molecular Medicine, National Yang-Ming University and Academia Sinica, Taipei 112, Taiwan
| | - Yun-Hsuan Yang
- The Ph.D. Program in Pharmaceutical Biotechnology, College of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan
| | - Jing-Ming Chen
- Graduate Institute of Applied Science and Engineering, College of Science and Engineering, Fu Jen Catholic University, New Taipei City 242, Taiwan
| | - Yu-Chen Tsai
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei 112, Taiwan
| | - Yeh-Shiu Chu
- Brain Research Center, National Yang-Ming University, Taipei 112, Taiwan
| | - Tse-Hung Huang
- Graduate Institute of Traditional Chinese Medicine, School of Traditional Chinese Medicine, Chang Gung University, Taoyuan 333, Taiwan.
- School of Nursing, National Taipei University of Nursing and Health Sciences, Taipei 110, Taiwan.
- Department of Traditional Chinese Medicine, Chang Gung Memorial Hospital, Keelung 204, Taiwan.
- Graduate Institute of Health Industry Technology, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan.
| | - Chi-Ying F Huang
- Department of Biotechnology and Laboratory Science in Medicine, National Yang-Ming University, Taipei 112, Taiwan.
- Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei 112, Taiwan.
| | - Jin-Mei Lai
- The Ph.D. Program in Pharmaceutical Biotechnology, College of Medicine, Fu Jen Catholic University, New Taipei City 242, Taiwan.
- Graduate Institute of Applied Science and Engineering, College of Science and Engineering, Fu Jen Catholic University, New Taipei City 242, Taiwan.
- Department of Life Science, College of Science and Engineering, Fu Jen Catholic University, New Taipei City 242, Taiwan.
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86
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Wei Y, Lv B, Xie J, Zhang Y, Lin Y, Wang S, Zhong J, Chen Y, Peng Y, Ma J. Plumbagin promotes human hepatoma SMMC-7721 cell apoptosis via caspase-3/vimentin signal-mediated EMT. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:2343-2355. [PMID: 31409969 PMCID: PMC6643260 DOI: 10.2147/dddt.s204787] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 06/19/2019] [Indexed: 12/15/2022]
Abstract
Background/aims Plumbagin (PL) has been shown to effectively inhibit tumor growth and migration of hepatocellular carcinoma cells in previous studies, but the specific mechanism for this remains unclear. The purpose of this study was to investigate the effects of PL-induced apoptosis in epithelial–mesenchymal transition (EMT) of human hepatocellular carcinoma (HCC) in vivo and in vitro. Methods SMMC-7721 cells were cultured, an EMT model was induced in vitro by TGF-β1, cell proliferation was detected by the MTT assay, cell invasion was analyzed by the Transwell invasion assay, and the apoptosis rate was measured by flow cytometry. RT-PCR was used to detect vimentin, E-cadherin, N-cadherin and snail mRNA, and Western blotting was used to detect the vimentin, caspase-3, PARP-1, E-cadherin, N-cadherin and snail protein expression levels. HE staining and TUNEL staining, immunohistochemistry and immunofluorescence were used to detect the expression levels of bax and bcl-2 in hepatocarcinoma xenografts and to evaluate their apoptosis in vivo. Results The in vitro results showed that PL inhibited the proliferation of EMT model cells, increased the apoptosis rate of the EMT model, and significantly decreased the vimentin, PARP-1, N-cadherin and snail protein levels, but significantly increased E-cadherin and caspase-3 protein expression. In addition, the in vivo results indicated that PL can affect the expression of bax/bcl-2 apoptotic marker proteins. Conclusion PL may induce apoptosis of human hepatocellular carcinoma cells undergoing epithelial–mesenchymal transition by increasing the caspase-3 protein level and cleaving vimentin.
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Affiliation(s)
- Yanfei Wei
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Beibei Lv
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Jinling Xie
- Medical Science Experimental Center, Guangxi University of Traditional Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Yuan Zhang
- Department of State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin 710032, People's Republic of China
| | - Yuning Lin
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Shengshan Wang
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Jing Zhong
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Yongxin Chen
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Yue Peng
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
| | - Jing Ma
- Department of Physiology, Guangxi University of Chinese Medicine, Nanning, Guangxi 530200, People's Republic of China
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High Expression of Vimentin is Associated With Progression and a Poor Outcome in Glioblastoma. Appl Immunohistochem Mol Morphol 2019; 26:337-344. [PMID: 27556820 DOI: 10.1097/pai.0000000000000420] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Glioblastoma multiforme (GBM) has a high recurrence and mortality rate. Because of a poor understanding of the mechanism for this disease, treatment regimens have remained limited. Vimentin, one of the major cytoskeletal proteins, is associated with cellular structure. However, the function of vimentin in GBM is still undefined. In the present study, we investigated the expression level of vimentin in 179 GBM tissues using immunohistochemistry. We found that the vimentin expression level was associated with the time to progression (P=0.029). A Kaplan-Meier analysis revealed that patients with high vimentin expression had a significantly shorter overall survival (P=0.0002) and progression-free survival (P=0.0001) compared with those with low expression. Furthermore, in vitro experiments showed that withaferin-A, a chemical inhibitor of vimentin, could inhibit GBM cell migration and invasion activity when its concentrations were <0.5 μM, and higher concentrations of withaferin-A could decrease the viability of U251and U87 cells significantly. In conclusion, our results indicated that vimentin may play an important role in the progression of GBM.
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88
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Profiling withanolide A for therapeutic targets in neurodegenerative diseases. Bioorg Med Chem 2019; 27:2508-2520. [DOI: 10.1016/j.bmc.2019.03.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 03/08/2019] [Accepted: 03/10/2019] [Indexed: 11/22/2022]
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89
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Li S, Chen M, Li Y, Tollefsbol TO. Prenatal epigenetics diets play protective roles against environmental pollution. Clin Epigenetics 2019; 11:82. [PMID: 31097039 PMCID: PMC6524340 DOI: 10.1186/s13148-019-0659-4] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 03/27/2019] [Indexed: 12/12/2022] Open
Abstract
It is thought that germ cells and preimplantation embryos during development are most susceptible to endogenous and exogenous environmental factors because the epigenome in those cells is undergoing dramatic elimination and reconstruction. Exposure to environmental factors such as nutrition, climate, stress, pathogens, toxins, and even social behavior during gametogenesis and early embryogenesis has been shown to influence disease susceptibility in the offspring. Early-life epigenetic modifications, which determine the expression of genetic information stored in the genome, are viewed as one of the general mechanisms linking prenatal exposure and phenotypic changes later in life. From atmospheric pollution, endocrine-disrupting chemicals to heavy metals, research increasingly suggests that environmental pollutions have already produced significant consequences on human health. Moreover, mounting evidence now links such pollution to relevant modification in the epigenome. The epigenetics diet, referring to a class of bioactive dietary compounds such as isothiocyanates in broccoli, genistein in soybean, resveratrol in grape, epigallocatechin-3-gallate in green tea, and ascorbic acid in fruits, has been shown to modify the epigenome leading to beneficial health outcomes. This review will primarily focus on the causes and consequences of prenatal environment pollution exposure on the epigenome, and the potential protective role of the epigenetics diet, which could play a central role in neutralizing epigenomic aberrations against environmental pollutions.
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Affiliation(s)
- Shizhao Li
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Min Chen
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Yuanyuan Li
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham, Birmingham, AL, USA.
- Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA.
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL, USA.
| | - Trygve O Tollefsbol
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL, USA.
- Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA.
- Nutrition Obesity Research Center, University of Alabama at Birmingham, Birmingham, AL, USA.
- Comprehensive Center for Healthy Aging, University of Alabama at Birmingham, Birmingham, AL, USA.
- Comprehensive Diabetes Center, University of Alabama at Birmingham, Birmingham, AL, USA.
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90
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Surolia R, Li FJ, Wang Z, Li H, Dsouza K, Thomas V, Mirov S, Pérez-Sala D, Athar M, Thannickal VJ, Antony VB. Vimentin intermediate filament assembly regulates fibroblast invasion in fibrogenic lung injury. JCI Insight 2019; 4:123253. [PMID: 30944258 DOI: 10.1172/jci.insight.123253] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 02/26/2019] [Indexed: 12/22/2022] Open
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive disease, with a median survival of 3-5 years following diagnosis. Lung remodeling by invasive fibroblasts is a hallmark of IPF. In this study, we demonstrate that inhibition of vimentin intermediate filaments (VimIFs) decreases the invasiveness of IPF fibroblasts and confers protection against fibrosis in a murine model of experimental lung injury. Increased expression and organization of VimIFs contribute to the invasive property of IPF fibroblasts in connection with deficient cellular autophagy. Blocking VimIF assembly by pharmacologic and genetic means also increases autophagic clearance of collagen type I. Furthermore, inhibition of expression of collagen type I by siRNA decreased invasiveness of fibroblasts. In a bleomycin injury model, enhancing autophagy in fibroblasts by an inhibitor of VimIF assembly, withaferin A (WFA), protected from fibrotic lung injury. Additionally, in 3D lung organoids, or pulmospheres, from patients with IPF, WFA reduced the invasiveness of lung fibroblasts in the majority of subjects tested. These studies provide insights into the functional role of vimentin, which regulates autophagy and restricts the invasiveness of lung fibroblasts.
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Affiliation(s)
- Ranu Surolia
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Fu Jun Li
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Zheng Wang
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Huashi Li
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Kevin Dsouza
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Vinoy Thomas
- Department of Materials Science and Engineering, and
| | - Sergey Mirov
- Department of Physics, University of Alabama at Birmingham (UAB), Birmingham, Alabama, USA
| | - Dolores Pérez-Sala
- Department of Structural and Chemical and Biology, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Mohammad Athar
- Department of Dermatology, UAB, Birmingham, Alabama, USA
| | - Victor J Thannickal
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Veena B Antony
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
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91
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Yang J, Li Y, Yan W, Li W, Qiu Q, Ye H, Chen L. Covalent modification of Cys-239 in β-tubulin by small molecules as a strategy to promote tubulin heterodimer degradation. J Biol Chem 2019; 294:8161-8170. [PMID: 30940730 DOI: 10.1074/jbc.ra118.006325] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 03/23/2019] [Indexed: 02/05/2023] Open
Abstract
Clinical microtubule-targeting drugs are functionally divided into microtubule-destabilizing and microtubule-stabilizing agents. Drugs from both classes achieve microtubule inhibition by binding different sites on tubulin and inhibiting or promoting polymerization with no concomitant effects on the protein levels of tubulin heterodimers. Here, we have identified a series of small molecules with diverse structures potentially representing a third class of novel tubulin inhibitors that promote degradation by covalent binding to Cys-239 of β-tubulin. The small molecules highlighted in this study include T0070907 (a peroxisome proliferator-activated receptor γ inhibitor), T007-1 (a T0070907 derivative), T138067, N,N'-ethylene-bis(iodoacetamide) (EBI), and allyl isothiocyanate (AITC). Label-free quantitative proteomic analysis revealed that T007-1 promotes tubulin degradation with high selectivity. Mass spectrometry findings showed covalent binding of both T0070907 and T007-01 to Cys-239 of β-tubulin. Furthermore, T007-1 exerted a degradative effect on tubulin isoforms possessing Cys-239 (β2, β4, and β5(β)) but not those containing Ser-239 (β3, β6) or mutant β-tubulin with a C239S substitution. Three small molecules (T138067, EBI, and AITC) also reported to bind covalently to Cys-239 of β-tubulin similarly induced tubulin degradation. Our results strongly suggest that covalent modification of Cys-239 of β-tubulin by small molecules could serve as a novel strategy to promote tubulin heterodimer degradation. We propose that these small molecules represent a third novel class of tubulin inhibitor agents that exert their effects through degradation activity.
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Affiliation(s)
- Jianhong Yang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yong Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Wei Yan
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Weimin Li
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qiang Qiu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Haoyu Ye
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China.
| | - Lijuan Chen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu 610041, China.
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92
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Kaschula CH, Tuveri R, Ngarande E, Dzobo K, Barnett C, Kusza DA, Graham LM, Katz AA, Rafudeen MS, Parker MI, Hunter R, Schäfer G. The garlic compound ajoene covalently binds vimentin, disrupts the vimentin network and exerts anti-metastatic activity in cancer cells. BMC Cancer 2019; 19:248. [PMID: 30894168 PMCID: PMC6425727 DOI: 10.1186/s12885-019-5388-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Accepted: 02/20/2019] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Garlic has been used for centuries for its flavour and health promoting properties that include protection against cancer. The vinyl disulfide-sulfoxide ajoene is one of the phytochemicals found in crushed cloves, hypothesised to act by S-thiolating reactive cysteines in target proteins. METHODS Using our fluorescently labelled ajoene analogue called dansyl-ajoene, ajoene's protein targets in MDA-MB-231 breast cancer cells were tagged and separated by 2D electrophoresis. A predominant band was identified by MALDI-TOF MS/MS to be vimentin. Target validation experiments were performed using pure recombinant vimentin protein. Computational modelling of vimentin bound to ajoene was performed using Schrödinger and pKa calculations by Epik software. Cytotoxicity of ajoene in MDA-MB-231 and HeLa cells was measured by the MTT assay. The vimentin filament network was visualised in ajoene-treated and non-treated cells by immunofluorescence and vimentin protein expression was determined by immunoblot. The invasion and migration activity was measured by wound healing and transwell assays using wildtype cells and cells in which the vimentin protein had been transiently knocked down by siRNA or overexpressed. RESULTS The dominant protein tagged by dansyl-ajoene was identified to be the 57 kDa protein vimentin. The vimentin target was validated to reveal that ajoene and dansyl-ajoene covalently bind to recombinant vimentin via a disulfide linkage at Cys-328. Computational modelling showed Cys-328 to be exposed at the termini of the vimentin tetramer. Treatment of MDA-MB-231 or HeLa cells with a non-cytotoxic concentration of ajoene caused the vimentin filament network to condense; and to increase vimentin protein expression. Ajoene inhibited the invasion and migration of both cancer cell lines which was found to be dependent on the presence of vimentin. Vimentin overexpression caused cells to become more migratory, an effect that was completely rescued by ajoene. CONCLUSIONS The garlic-derived phytochemical ajoene targets and covalently modifies vimentin in cancer cells by S-thiolating Cys-328. This interaction results in the disruption of the vimentin filament network and contributes to the anti-metastatic activity of ajoene in cancer cells.
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Affiliation(s)
- Catherine H. Kaschula
- Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch, 7600 South Africa
| | - Rosanna Tuveri
- Department of Biomedical Science, University of Cagliari, 09042 Monserrato, Italy
| | - Ellen Ngarande
- Department of Integrative Biomedical Sciences and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, 7925 South Africa
| | - Kevin Dzobo
- Department of Integrative Biomedical Sciences and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, 7925 South Africa
- International Centre for Genetic Engineering and Biotechnology (ICGEB), UCT Medical Campus, Anzio Rd, Observatory, Cape Town, 7925 South Africa
| | - Christopher Barnett
- Department of Chemistry, University of Cape Town, Rondebosch, Cape Town, 7700 South Africa
| | - Daniel A. Kusza
- Department of Chemistry, University of Cape Town, Rondebosch, Cape Town, 7700 South Africa
| | - Lisa M. Graham
- Department of Integrative Biomedical Sciences and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, 7925 South Africa
| | - Arieh A. Katz
- Department of Integrative Biomedical Sciences and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, 7925 South Africa
| | - Mohamed Suhail Rafudeen
- Department of Molecular and Cell Biology, University of Cape Town, Rondebosch, Cape Town, 7700 South Africa
| | - M. Iqbal Parker
- Department of Integrative Biomedical Sciences and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, 7925 South Africa
| | - Roger Hunter
- Department of Chemistry, University of Cape Town, Rondebosch, Cape Town, 7700 South Africa
| | - Georgia Schäfer
- Department of Integrative Biomedical Sciences and Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, 7925 South Africa
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93
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Xiao X, Li BX. Identification of lamins as the molecular targets of LBL1 using a clickable photoaffinity probe. Methods Enzymol 2019; 633:185-201. [PMID: 32046845 DOI: 10.1016/bs.mie.2019.02.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Phenotypic screening is a powerful approach to discover small molecules targeting pathways or disease biology with complex genetic causes. Following the initial discovery of these small molecules is their target identification, which is at the cornerstone in addressing their biological and clinical utility. Yet, finding the needle in the haystack remains a challenge. Nuclear lamins are type V intermediate filament proteins that form a filamentous structure underneath the inner nuclear envelope to support the mechanical stability of the mammalian cell nucleus. They also participate a myriad of other cellular signaling processes with incompletely understood molecular mechanisms. Small molecules that can directly bind to nuclear lamins will be incredible tools to address lamins' roles in different aspects of biology. However, these small molecules did not exist until recently. We previously discovered an acylpyrroloquinazoline called LBL1 that selectively killed breast cancer cells without harming normal human cells. To help understand the mechanism of action of LBL1, we recently took an unbiased chemical proteomics approach to identify its direct binding targets from the entire human cellular proteome. In this chapter, we describe our detailed methods to identify and validate lamins as the direct targets of LBL1. In this approach, we developed a clickable photoaffinity probe called LBL1-P that contains acylpyrroloquinazoline, trifluoromethyldiazirine and alkyne groups. Furthermore, we described a fluorescence microscopic method to validate that LBL1 directly targets lamin A in living cells. When properly designed, this approach should be broadly applicable to other bioactive small molecules.
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Affiliation(s)
- Xiangshu Xiao
- Program in Chemical Biology, Department of Chemical Physiology and Biochemistry, Knight Cancer Institute, Oregon Health and Science University, Portland, OR, United States
| | - Bingbing X Li
- Program in Chemical Biology, Department of Chemical Physiology and Biochemistry, Knight Cancer Institute, Oregon Health and Science University, Portland, OR, United States.
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Pietraszkiewicz A, Hampton C, Caplash S, Lei L, Capetanaki Y, Tadvalkar G, Pal-Ghosh S, Stepp MA, Bargagna-Mohan P, Mohan R. Desmin deficiency is not sufficient to prevent corneal fibrosis. Exp Eye Res 2019; 180:155-163. [PMID: 30590024 PMCID: PMC6389382 DOI: 10.1016/j.exer.2018.12.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/08/2018] [Accepted: 12/22/2018] [Indexed: 12/16/2022]
Abstract
The type III intermediate filament (IF) proteins vimentin and desmin are sequentially overexpressed in stromal myofibroblasts over the period when fibrosis sets in after corneal injury. Prior findings have revealed vimentin-deficient mice are significantly protected from corneal fibrosis after alkali injury, which has implicated this IF protein as an important regulator of corneal fibrosis. It has remained as yet unproven whether desmin contributes in any significant manner to corneal fibrosis. Here we have employed desmin-deficient (Des KO) mice in the corneal alkali injury model and show that injured Des KO mice develop fibrosis and show similar levels of corneal opacity at 14 days post-injury as wild type (WT) mice and retain this phenotype even at 30d post injury. Des KO corneas from injured mice show upregulation of vimentin and alpha-smooth muscle actin expression to equivalent levels as WT corneas, illuminating that desmin deficiency does not interfere with myofibrobast differentiation. Employing the small molecule withaferin A (WFA), an inhibitor of vimentin, we show that WFA treatment causes the decrease in steady state levels of vimentin and serine 38 phosphorylated vimentin, the latter a biomarker associated with corneal fibrosis, and improved corneal clarity through blockade of myofibroblast differentiation. To investigate further the mechanism of fibrosis in desmin deficiency, we examined keratin 8 expression in the epithelium, and found reduced levels of this cytokeratin in injured Des KO corneas compared to WT corneas. This finding also corroborates the decrease of cell proliferation in injured Des KO corneas compared to that in WT corneas. The fibrotic phenotype of Des KO corneas also features abundant vascularization, further exemplifying the magnitude of corneal pathology. Together, these findings illuminate that desmin does not contribute significantly to corneal fibrosis in this injury model.
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Affiliation(s)
| | - Christopher Hampton
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, USA
| | - Sonny Caplash
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, USA
| | - Ling Lei
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, USA
| | - Yassemi Capetanaki
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Gauri Tadvalkar
- Department of Ophthalmology, George Washington University, Washington, DC, USA
| | - Sonali Pal-Ghosh
- Department of Ophthalmology, George Washington University, Washington, DC, USA
| | - Mary Ann Stepp
- Department of Ophthalmology, George Washington University, Washington, DC, USA
| | - Paola Bargagna-Mohan
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, USA
| | - Royce Mohan
- Department of Neuroscience, University of Connecticut Health Center, Farmington, CT, USA.
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95
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Impeding the single-strand annealing pathway of DNA double-strand break repair by withaferin A-mediated FANCA degradation. DNA Repair (Amst) 2019; 77:10-17. [PMID: 30844655 DOI: 10.1016/j.dnarep.2019.02.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 02/13/2019] [Accepted: 02/20/2019] [Indexed: 12/18/2022]
Abstract
FANCA is a key player in the canonical Fanconi anemia (FA) repair pathway. We have recently shown that FANCA also plays an important role in the single-strand annealing sub-pathway (SSA) of DNA double-strand break (DSB) repair by biochemically catalyzing single-strand annealing. Here, we report that a steroidal lactone withaferin A (WA) specifically impedes SSA repair by promoting FANCA downregulation at a sub-micromolar concentration range. We find that WA causes FANCA downregulation post-translationally in a proteasome-dependent manner. This WA-mediated downregulation is achieved through HSP90 inhibition and disruption of the FANCA-HSP90 interaction. WA-mediated FANCA degradation significantly reduces cellular SSA repair, abolishes FANCD2 monoubiquitination, elevates sensitivity to mitomycin C, and results in accumulation of DSBs. Importantly, the WA-induced defect in SSA repair is highly dependent on the absence of FANCA protein and overexpression of exogenous WT-FANCA protein in WA-treated cells significantly complements the repair defect.
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96
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Biskou O, Casanova V, Hooper KM, Kemp S, Wright GP, Satsangi J, Barlow PG, Stevens C. The type III intermediate filament vimentin regulates organelle distribution and modulates autophagy. PLoS One 2019; 14:e0209665. [PMID: 30699149 PMCID: PMC6353089 DOI: 10.1371/journal.pone.0209665] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 12/10/2018] [Indexed: 12/21/2022] Open
Abstract
The cytoskeletal protein vimentin plays a key role in positioning of organelles within the cytosol and has been linked to the regulation of numerous cellular processes including autophagy, however, how vimentin regulates autophagy remains relatively unexplored. Here we report that inhibition of vimentin using the steroidal lactone Withaferin A (WFA) causes vimentin to aggregate, and this is associated with the relocalisation of organelles including autophagosomes and lysosomes from the cytosol to a juxtanuclear location. Vimentin inhibition causes autophagosomes to accumulate, and we demonstrate this results from modulation of mechanistic target of rapamycin (mTORC1) activity, and disruption of autophagosome-lysosome fusion. We suggest that vimentin plays a physiological role in autophagosome and lysosome positioning, thus identifying vimentin as a key factor in the regulation of mTORC1 and autophagy.
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Affiliation(s)
- Olga Biskou
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Victor Casanova
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Kirsty M. Hooper
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Sadie Kemp
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Graham P. Wright
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Jack Satsangi
- Centre for Genomic & Experimental Medicine, University of Edinburgh, Western General Hospital Campus, Crewe Road, Edinburgh, United Kingdom
- Translational Gastroenterology Unit, Nuffield Department of Medicine, John Radcliffe Hospital, Oxford, United Kingdom
| | - Peter G. Barlow
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
| | - Craig Stevens
- School of Applied Sciences, Edinburgh Napier University, Sighthill Campus, Sighthill Court, Edinburgh, United Kingdom
- * E-mail:
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Zhu J, Chen Y, Chen Z, Wei J, Zhang H, Ding L. Leukamenin E, an ent-kaurane diterpenoid, is a novel and potential keratin intermediate filament inhibitor. Eur J Pharmacol 2019; 846:86-99. [PMID: 30641059 DOI: 10.1016/j.ejphar.2019.01.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 12/19/2018] [Accepted: 01/10/2019] [Indexed: 12/19/2022]
Abstract
Many ent-kaurane diterpenoids exhibit notable antitumor activity in vitro and in vivo, and some have been used as cancer therapeutic agents in China. In this study, we identified a novel molecular target of leukamenin E, an ent-kaurane diterpenoid, using an available whole-cell model in combination with immunofluorescence imaging and mass spectrometry (MS). The cytoskeleton-disrupting drugs cytochalasin B and colchicine caused the depolymerization of microfilaments and the collapse of microtubules and vimentin filaments, respectively, but had little effects on HepG2 and NCI-H1299 cells spreading as well as keratin filament (KF) reassembly, indicating that KFs are involved in cell spreading. Leukamenin E blocked HepG2 and NCI-H1299 cells adhesion/spreading and KF reassembly at subtoxic concentrations, indicating that leukamenin E may target KFs. Moreover, leukamenin E, at 3 μM for 24 h or 10 μM for 3 h, induced massive KF depolymerization in well-spread HepG2 and NCI-H1299 cells treated with/without cytochalasin B and colchicine. MS analysis indicated that leukamenin E could covalently modify amino acid residue(s) in a synthetic peptide based on keratin 1 and keratin 10 sequences, suggesting that covalent modification of the synthetic peptide by leukamenin E caused assembly inhibition or disrupted KF polymerization in HepG2 and NCI-H1299 cells. In addition, acridine orange/ethidium bromide staining and western blotting confirmed that there was no correlation between the KF-disrupting effects and apoptosis or keratin expression. Thus, we propose that leukamenin E is a novel inhibitor of KF assembly, and as such, can serve as a chemical probe of KF functions and a potential molecular target for ent-kaurane diterpenoid-based therapeutics.
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Affiliation(s)
- Jinhui Zhu
- Northwest Normal University School of Life Sciences, No. 967, east Anning road, Lanzhou, Gansu province 730070, PR China
| | - Yiping Chen
- Northwest Normal University School of Life Sciences, No. 967, east Anning road, Lanzhou, Gansu province 730070, PR China
| | - Zongru Chen
- Northwest Normal University School of Life Sciences, No. 967, east Anning road, Lanzhou, Gansu province 730070, PR China
| | - Jingxin Wei
- Northwest Normal University School of Life Sciences, No. 967, east Anning road, Lanzhou, Gansu province 730070, PR China
| | - Hui Zhang
- Northwest Normal University School of Life Sciences, No. 967, east Anning road, Lanzhou, Gansu province 730070, PR China
| | - Lan Ding
- Northwest Normal University School of Life Sciences, No. 967, east Anning road, Lanzhou, Gansu province 730070, PR China.
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98
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Ahmad R. Steroidal glycoalkaloids from Solanum nigrum target cytoskeletal proteins: an in silico analysis. PeerJ 2019; 7:e6012. [PMID: 30627484 PMCID: PMC6321755 DOI: 10.7717/peerj.6012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 10/26/2018] [Indexed: 12/03/2022] Open
Abstract
Background Solanum nigrum (black nightshade; S. nigrum), a member of family Solanaceae, has been endowed with a heterogeneous array of secondary metabolites of which the steroidal glycoalkaloids (SGAs) and steroidal saponins (SS) have vast potential to serve as anticancer agents. Since there has been much controversy regarding safety of use of glycoalkaloids as anticancer agents, this area has remained more or less unexplored. Cytoskeletal proteins like actin play an important role in maintaining cell shape, synchronizing cell division, cell motility, etc. and along with their accessory proteins may also serve as important therapeutic targets for potential anticancer candidates. In the present study, glycoalkaloids and saponins from S. nigrum were screened for their interaction and binding affinity to cytoskeletal proteins, using molecular docking. Methods Bioactivity score and Prediction of Activity Spectra for Substances (PASS) analysis were performed using softwares Molinspiration and Osiris Data Explorer respectively, to assess the feasibility of selected phytoconstituents as potential drug candidates. The results were compared with two standard reference drugs doxorubicin hydrochloride (anticancer) and tetracycline (antibiotic). Multivariate data obtained were analyzed using principal component analysis (PCA). Results Docking analysis revealed that the binding affinities of the phytoconstituents towards the target cytoskeletal proteins decreased in the order coronin>villin>ezrin>vimentin>gelsolin>thymosin>cofilin. Glycoalkaloid solasonine displayed the greatest binding affinity towards the target proteins followed by alpha-solanine whereas amongst the saponins, nigrumnin-I showed maximum binding affinity. PASS Analysis of the selected phytoconstituents revealed 1 to 3 violations of Lipinski’s parameters indicating the need for modification of their structure-activity relationship (SAR) for improvement of their bioactivity and bioavailability. Glycoalkaloids and saponins all had bioactivity scores between −5.0 and 0.0 with respect to various receptor proteins and target enzymes. Solanidine, solasodine and solamargine had positive values of druglikeness which indicated that these compounds have the potential for development into future anticancer drugs. Toxicity potential evaluation revealed that glycoalkaloids and saponins had no toxicity, tumorigenicity or irritant effect(s). SAR analysis revealed that the number, type and location of sugar or the substitution of hydroxyl group on alkaloid backbone had an effect on the activity and that the presence of α-L-rhamnopyranose sugar at C-2 was critical for a compound to exhibit anticancer activity. Conclusion The present study revealed some cytoskeletal target(s) for S. nigrum phytoconstituents by docking analysis that have not been previously reported and thus warrant further investigations both in vitro and in vivo.
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Affiliation(s)
- Rumana Ahmad
- Department of Biochemisty, Era's Lucknow Medical College and Hospital, Era University, Lucknow, Uttar Pradesh, India
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Semelakova M, Grauzam S, Betadthunga P, Tiedeken J, Coaxum S, Neskey DM, Rosenzweig SA. Vimentin and Non-Muscle Myosin IIA are Members of the Neural Precursor Cell Expressed Developmentally Down-Regulated 9 (NEDD9) Interactome in Head and Neck Squamous Cell Carcinoma Cells. Transl Oncol 2019; 12:49-61. [PMID: 30267961 PMCID: PMC6160858 DOI: 10.1016/j.tranon.2018.09.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 09/08/2018] [Accepted: 09/08/2018] [Indexed: 12/11/2022] Open
Abstract
Here we demonstrate an interaction between neural precursor cell expressed, developmentally-downregulated 9 (NEDD9) and the cytoskeletal proteins vimentin and non-muscle myosin IIA (NMIIA), based on co-immunoprecipitation and mass spectrometric sequence identification. Vimentin was constitutively phosphorylated at Ser56 but vimentin associated with NEDD9-was not phosphorylated at Ser56. In contrast, NMIIA bound to NEDD9 was phosphorylated on S1943 consistent with its function in invasion and secretion. Treatment of cells with the vimentin-targeting steroidal lactone withaferin A had no effect on vimentin turnover as previously reported, instead causing NEDD9 cleavage and cell death. The NMIIA-selective inhibitor blebbistatin induced cells to form long extensions and attenuated secretion of matrix metalloproteinases (MMPs) 2 and 9. While the site of vimentin interaction on NEDD9 was not defined, NMIIA was found to interact with NEDD9 at its substrate domain. NEDD9 interactions with vimentin and NMIIA are consistent with these proteins having roles in MMP secretion and cell invasion. These findings suggest that a better understanding of NEDD9 signaling is likely to reveal novel therapeutic targets for the prevention of invasion and metastasis.
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Affiliation(s)
- Martina Semelakova
- Institute of Biology and Ecology, Department of Cell Biology, Faculty of Science, Pavol Jozef Šafárik University, Košice, Slovakia; Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue MSC 509, Charleston, SC 29425-5050
| | - Stèphane Grauzam
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue MSC 509, Charleston, SC 29425-5050
| | - Prabhakar Betadthunga
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue MSC 509, Charleston, SC 29425-5050; Department of Post Graduate-Studies and Research in Biotechnology, Sahydri Science College, Kuvempu University, Shimoga, Karnataka, India, 577203
| | - Jessica Tiedeken
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue MSC 509, Charleston, SC 29425-5050
| | - Sonya Coaxum
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue MSC 509, Charleston, SC 29425-5050; Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina
| | - David M Neskey
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue MSC 509, Charleston, SC 29425-5050; Department of Otolaryngology, Head and Neck Surgery, Medical University of South Carolina; Hollings Cancer Center, Medical University of South Carolina, 173 Ashley Avenue MSC 550, Charleston, SC 29425-5050
| | - Steven A Rosenzweig
- Department of Cell and Molecular Pharmacology & Experimental Therapeutics, Medical University of South Carolina, 173 Ashley Avenue MSC 509, Charleston, SC 29425-5050; Hollings Cancer Center, Medical University of South Carolina, 173 Ashley Avenue MSC 550, Charleston, SC 29425-5050.
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Paier CRK, Maranhão SS, Carneiro TR, Lima LM, Rocha DD, da Silva Santos R, de Farias KM, de Moraes-Filho MO, Pessoa C. Natural products as new antimitotic compounds for anticancer drug development. Clinics (Sao Paulo) 2018; 73:e813s. [PMID: 30540125 PMCID: PMC6256996 DOI: 10.6061/clinics/2018/e813s] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/09/2018] [Indexed: 12/19/2022] Open
Abstract
Cell cycle control genes are frequently mutated in cancer cells, which usually display higher rates of proliferation than normal cells. Dysregulated mitosis leads to genomic instability, which contributes to tumor progression and aggressiveness. Many drugs that disrupt mitosis have been studied because they induce cell cycle arrest and tumor cell death. These antitumor compounds are referred to as antimitotics. Vinca alkaloids and taxanes are natural products that target microtubules and inhibit mitosis, and their derivatives are among the most commonly used drugs in cancer therapy worldwide. However, severe adverse effects such as neuropathies are frequently observed during treatment with microtubule-targeting agents. Many efforts have been directed at developing improved antimitotics with increased specificity and decreased likelihood of inducing side effects. These new drugs generally target specific components of mitotic regulation that are mainly or exclusively expressed during cell division, such as kinases, motor proteins and multiprotein complexes. Such small molecules are now in preclinical studies and clinical trials, and many are products or derivatives from natural sources. In this review, we focused on the most promising targets for the development of antimitotics and discussed the advantages and disadvantages of these targets. We also highlighted the novel natural antimitotic agents under investigation by our research group, including combretastatins, withanolides and pterocarpans, which show the potential to circumvent the main issues in antimitotic therapy.
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Affiliation(s)
- Carlos Roberto Koscky Paier
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- *Corresponding author. E-mail:
| | - Sarah Sant'Anna Maranhão
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Teiliane Rodrigues Carneiro
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
- Laboratorio de Avaliacao e Sintese de Substancias Bioativas (LASSBio), Instituto de Ciencia e Tecnologia de Farmacos e Medicamentos (INCT-INOFAR), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BR
| | - Lídia Moreira Lima
- Laboratorio de Avaliacao e Sintese de Substancias Bioativas (LASSBio), Instituto de Ciencia e Tecnologia de Farmacos e Medicamentos (INCT-INOFAR), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, BR
| | - Danilo Damasceno Rocha
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Renan da Silva Santos
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Kaio Moraes de Farias
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Manoel Odorico de Moraes-Filho
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
| | - Claudia Pessoa
- Laboratorio de Oncologia Experimental, Nucleo de Pesquisa e Desenvolvimento de Medicamentos (NPDM), Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Farmacologia, Universidade Federal do Ceara, Fortaleza, CE, BR
- Programa de Pos graduacao em Biotecnologia, Rede Nordeste de Biotecnologia (RENORBIO), Universidade Federal do Ceara, Fortaleza, CE, BR
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