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Falanga AP, Terracciano M, Oliviero G, Roviello GN, Borbone N. Exploring the Relationship between G-Quadruplex Nucleic Acids and Plants: From Plant G-Quadruplex Function to Phytochemical G4 Ligands with Pharmaceutic Potential. Pharmaceutics 2022; 14:2377. [PMID: 36365194 PMCID: PMC9698481 DOI: 10.3390/pharmaceutics14112377] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 10/19/2022] [Accepted: 11/01/2022] [Indexed: 10/31/2023] Open
Abstract
G-quadruplex (G4) oligonucleotides are higher-order DNA and RNA secondary structures of enormous relevance due to their implication in several biological processes and pathological states in different organisms. Strategies aiming at modulating human G4 structures and their interrelated functions are first-line approaches in modern research aiming at finding new potential anticancer treatments or G4-based aptamers for various biomedical and biotechnological applications. Plants offer a cornucopia of phytocompounds that, in many cases, are effective in binding and modulating the thermal stability of G4s and, on the other hand, contain almost unexplored G4 motifs in their genome that could inspire new biotechnological strategies. Herein, we describe some G4 structures found in plants, summarizing the existing knowledge of their functions and biological role. Moreover, we review some of the most promising G4 ligands isolated from vegetal sources and report on the known relationships between such phytochemicals and G4-mediated biological processes that make them potential leads in the pharmaceutical sector.
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Affiliation(s)
- Andrea P. Falanga
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
| | - Monica Terracciano
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
| | - Giorgia Oliviero
- Department of Molecular Medicine and Medical Biotechnologies, Via Sergio Pansini 5, 80131 Naples, Italy
| | - Giovanni N. Roviello
- Institute of Biostructures and Bioimaging, Italian National Council for Research (IBB-CNR), Area di Ricerca site and Headquarters, Via Pietro Castellino 111, 80131 Naples, Italy
| | - Nicola Borbone
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Naples, Italy
- Institute of Applied Sciences and Intelligent Systems, Italian National Council of Research (ISASI-CNR), Via Pietro Castellino 111, 80131 Napoli, Italy
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2
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Basu A, Kumar GS. Interaction of the putative anticancer alkaloid chelerythrine with nucleic acids: biophysical perspectives. Biophys Rev 2020; 12:10.1007/s12551-020-00769-3. [PMID: 33131000 PMCID: PMC7755961 DOI: 10.1007/s12551-020-00769-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Accepted: 10/26/2020] [Indexed: 12/29/2022] Open
Abstract
Alkaloids represent an important group of molecules that have immense pharmacological potential. Benzophenanthridine alkaloids are one such class of alkaloids known for their myriad pharmacological activities that include potential anticancer activities. Chelerythrine is a premier member of the benzophenanthridine family of the isoquinoline group. This alkaloid is endowed with excellent medicinal properties and exhibits antibacterial, antimicrobial and anti-inflammatory properties. The molecular basis of its therapeutic activity is considered due to its nucleic acid binding capabilities. This review focuses on consolidating the current status on the nucleic acid binding properties of chelerythrine that is essential for the rational design and development of this alkaloid as a potential drug. This work reviews the interaction of chelerythrine with different natural and synthetic nucleic acids like double- and single-stranded DNAs, heat-denatured DNA, quadruplex DNA, double- and single-stranded RNA, tRNA and triplex and quadruplex RNA. The review emphasizes on the mode, specificity, conformational aspects and energetics of the binding that is particularly helpful for developing nucleic acid targeted therapeutics. The fundamental results discussed in this review will greatly benefit drug development for many diseases and serve as a database for the design of futuristic benzophenanthridine-based therapeutics.
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Affiliation(s)
- Anirban Basu
- Department of Chemistry, Vidyasagar University, Midnapore, 721 102, India.
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Sengupta P, Chatterjee S. Inosine 5'-diphosphate, a molecular decoy rescues Nucleoside diphosphate kinase from c-MYC G-Quadruplex unfolding. Biochim Biophys Acta Gen Subj 2020; 1864:129649. [PMID: 32492501 DOI: 10.1016/j.bbagen.2020.129649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/02/2020] [Accepted: 05/27/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND The transcription-inhibitory G-Quadruplex(Pu27-GQ) at c-MYC promoter is challenging to target due to structural heterogeneity. Nucleoside diphosphate kinase (NM23-H2) specifically binds and unfolds Pu27-GQ to increase c-MYC transcription. Here, we used Inosine 5'-diphosphate (IDP) to disrupt NM23-H2-Pu27-GQ interactions and arrest c-MYC transcription without compromising NM23-H2-mediated kinase properties. METHODS Site-directed mutagenesis,31P-NMR and STD-NMR studies delineate the epitope of NM23-H2-IDP complex and characterize specific amino acids in NM23-H2 involved in Pu27-GQ and IDP interactions. Immunoprecipitations and phosphohistidine-immunoblots reveal how IDP blocks NM23-H2-Pu27 association to downregulate c-MYC transcription in MDAMB-231 cells exempting NM23-H2-mediated kinase properties. RESULTS NMR studies show that IDP binds to the Guanosine diphosphate-binding pocket of NM23-H2 (KD = 5.0 ± 0.276 μM). Arg88-driven hydrogen bonds to the terminal phosphate of IDP restricts P-O-P bond-rotation increasing its pKa (∆pKa = 0.85 ± 0.0025).9-inosinyl moiety of IDP is stacked over Phe60 phenyl ring driving trans-conformation of inosine and axial geometry of pyrophosphates. Chromatin immunoprecipitations revealed that these interactions rescue NM23-H2-driven Pu27-GQ unfolding, which triggers Nucleolin recruitment and lowers Sp1 occupancy at c-MYC promoter stabilizing Pu27-GQ. This silences c-MYC transcription that reduces c-MYC-Sp1 association amplifying Sp1 recruitment across P21 promoter stimulating P21 transcription and G2/M arrest. CONCLUSIONS IDP synergizes the effects of Pu27-GQ-interacting compounds to abrogate c-MYC transcription and induce apoptosis in MDAMB-231 cells by disrupting NM23-H2-Pu27-GQ interactions without affecting NM23-H2-mediated kinase properties. GENERAL SIGNIFICANCE Our study provides a pragmatic approach for developing NM23-H2-targeting regulators to rescue NM23-H2 binding at structurally ambiguous Pu27-GQ that synergizes the anti-tumorigenic effects of GQ-based therapeutics with minimized off-target effects.
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Affiliation(s)
- Pallabi Sengupta
- Department of Biophysics, Bose Institute, Centenary Campus, P-1/12, C.I.T. Scheme VIIM, Kankurgachi, Kolkata 700054, India
| | - Subhrangsu Chatterjee
- Department of Biophysics, Bose Institute, Centenary Campus, P-1/12, C.I.T. Scheme VIIM, Kankurgachi, Kolkata 700054, India.
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Garro HA, Pungitore CR. DNA Related Enzymes as Molecular Targets for Antiviral and Antitumoral Chemotherapy. A Natural Overview of the Current Perspectives. Curr Drug Targets 2020; 20:70-80. [PMID: 29697027 DOI: 10.2174/1389450119666180426103558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/17/2018] [Accepted: 04/19/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND The discovery of new chemotherapeutic agents still remains a continuous goal to achieve. DNA polymerases and topoisomerases act in nucleic acids metabolism modulating different processes like replication, mitosis, damage repair, DNA topology and transcription. It has been widely documented that Polymerases serve as molecular targets for antiviral and antitumoral chemotherapy. Furthermore, telomerase is a ribonucleoprotein with exacerbated activity in most of the tumor cell lines, becoming as an emergent target in Cancer treatment. METHODS We undertook an exhaustive search of bibliographic databases for peer-reviewed research literature related to the last decade. The characteristics of screened bibliography describe structure activity relationships and show the principal moieties involved. This work tries to summarize the investigation about natural and semi-synthetic products with natural origin with the faculty to inhibit key enzymes that play a crucial role in DNA metabolism. RESULTS Eighty-five data references were included in this review, showing natural products widely distributed throughout the plant kingdom and their bioactive properties such as tumor growing inhibitory effects, and anti-AIDS activity. CONCLUSION The findings of this review confirm the importance to find new drugs and biologically active natural products, and their potential medicinally useful benefits.
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Affiliation(s)
- Hugo A Garro
- Intequi-Conicet, Fac. Qca., Bioqca. y Fcia., Univ. Nac. de San Luis (U.N.S.L), Chacabuco y Pedernera, 5700 San Luis, Argentina
| | - Carlos R Pungitore
- Intequi-Conicet, Fac. Qca., Bioqca. y Fcia., Univ. Nac. de San Luis (U.N.S.L), Chacabuco y Pedernera, 5700 San Luis, Argentina
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5
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Pramanik S, Jash M, Mondal D, Chowdhury C. Palladium‐Catalyzed Synthesis of 6
H
‐Dibenzo[
c,h
]chromenes and 5,6‐Dihydrobenzo[
c
]phenanthridines: Application to the Synthesis of Dibenzo[
c,h
]chromene‐6‐ones, Benzo[
c
]phenanthridines, and
Arnottin I. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900833] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Subhendu Pramanik
- Organic & Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road Kolkata- 700032 India
| | - Moumita Jash
- Organic & Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road Kolkata- 700032 India
| | - Debasmita Mondal
- Organic & Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road Kolkata- 700032 India
| | - Chinmay Chowdhury
- Organic & Medicinal Chemistry DivisionCSIR-Indian Institute of Chemical Biology 4, Raja S. C. Mullick Road Kolkata- 700032 India
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Sengupta P, Bhattacharya A, Sa G, Das T, Chatterjee S. Truncated G-Quadruplex Isomers Cross-Talk with the Transcription Factors To Maintain Homeostatic Equilibria in c-MYC Transcription. Biochemistry 2019; 58:1975-1991. [PMID: 30920805 DOI: 10.1021/acs.biochem.9b00030] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The nuclease hypersensitive element III1 (NHE III1) upstream c-MYC promoter harbors a transcription-silencing G-quadruplex (Pu27) element. Dynamic turnover of various transcription factors (TFs) across Pu27 to control c-MYC transcription homeostasis is enigmatic. Here, we reveal that native Pu27 evolves truncated G-quadruplex isomers (Pu19, Pu22, Pu24, and Pu25) in cells that are optimal intracellular targets of specific TFs in a sequence- and structure-dependent manner. Nuclear magnetic resonance and isothermal titration calorimetry envisaged that NM23-H2 (nucleoside diphosphate kinase) and nucleolin induce conformational fluctuations in Pu27 to sample specific conformationally restricted conformer(s). Structural investigations revealed that the flanking guanines at 5'-Pu27 control solvent exposure at G-quartets upon NM23-H2 and nucleolin binding driving Pu27 unfolding and folding, respectively. Transient chromatin immunoprecipitations confirmed that NM23-H2 drives the conformation switch to Pu24 that outcompetes nucleolin recruitment. Similarly, nucleolin arrests Pu27 in the Pu22 conformer minimizing NM23-H2 binding at Pu27. hnRNPK (heterogeneous nuclear ribonucleoprotein K) positively regulates NM23-H2 and nucleolin association at Pu27 despite their antagonism. On the basis of these results, we simulated the transcription kinetics in a feed-forward loop in which the transcription output responds to hnRNPK-induced early activation via NM23-H2 association, which favors Pu24 formation at NHE III1 reducing nucleolin occupancy and driving quadruplex unfolding to initiate transcription. NM23-H2 further promotes hnRNPK deposition across NHE III1 altering Pu27 plasticity that finally enriches the nucleolin abundance to drive Pu22 formation and weaken NM23-H2 binding to extinguish transcription. This mechanism involves three positive feedback loops (NM23-H2-hnRNPK, NM23-H2-CNBP, and hnRNPK-nucleolin) and one negative feedback loop (NM23-H2-nucleolin) controlling optimal turnover and residence time of TFs at Pu27 to homeostatically regulate c-MYC transcription.
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Affiliation(s)
- Pallabi Sengupta
- Department of Biophysics , Bose Institute , P 1/12, C. I. T. Road, Scheme-VIIM , Kolkata 700054 , West Bengal , India
| | - Apoorva Bhattacharya
- Division of Molecular Medicine , Bose Institute , P 1/12, C. I. T. Road, Scheme-VIIM , Kolkata 700054 , West Bengal , India
| | - Gaurisankar Sa
- Division of Molecular Medicine , Bose Institute , P 1/12, C. I. T. Road, Scheme-VIIM , Kolkata 700054 , West Bengal , India
| | - Tanya Das
- Division of Molecular Medicine , Bose Institute , P 1/12, C. I. T. Road, Scheme-VIIM , Kolkata 700054 , West Bengal , India
| | - Subhrangsu Chatterjee
- Department of Biophysics , Bose Institute , P 1/12, C. I. T. Road, Scheme-VIIM , Kolkata 700054 , West Bengal , India
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Papi F, Ferraroni M, Rigo R, Da Ros S, Bazzicalupi C, Sissi C, Gratteri P. Role of the Benzodioxole Group in the Interactions between the Natural Alkaloids Chelerythrine and Coptisine and the Human Telomeric G-Quadruplex DNA. A Multiapproach Investigation. JOURNAL OF NATURAL PRODUCTS 2017; 80:3128-3135. [PMID: 29148767 DOI: 10.1021/acs.jnatprod.7b00350] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The binding properties toward the human telomeric G-quadruplex of the two natural alkaloids coptisine and chelerythrine were studied using spectroscopic techniques, molecular modeling, and X-ray diffraction analysis. The results were compared with reported data for the parent compounds berberine and sanguinarine. Spectroscopic studies showed modest, but different rearrangements of the DNA-ligand complexes, which can be explained considering particular stereochemical features for these alkaloids, in spite of the similarity of their skeletons. In fact, the presence of a dioxolo moiety rather than the two methoxy functions improves the efficiency of coptisine and sanguinarine in comparison to berberine and chelerythrine, and the overall stability trend is sanguinarine > chelerythrine ≈ coptisine > berberine. Accordingly, the X-ray diffraction analysis confirmed the involvement of the benzodioxolo groups in the coptisine/DNA binding by means of π···π, O···π, and CH···O interactions. Similar information is provided by modeling studies, which, additionally, evidenced reasons for the quadruplex vs double-helix selectivity shown by these alkaloids. Thus, the analyses shed light on the key role of the benzodioxolo moieties in strengthening the interaction with the G4-folded human telomeric sequence and indicated the superior G4 stabilizing properties of the benzophenanthridine scaffold with respect to the protoberberine one and conversely the better G4 vs dsDNA selectivity profile of coptisine over the other alkaloids.
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Affiliation(s)
- F Papi
- Department of Chemistry "U. Schiff", University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
- Department Neurofarba-Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence , Via U. Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
| | - M Ferraroni
- Department of Chemistry "U. Schiff", University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
| | - R Rigo
- Department of Pharmaceutical and Pharmacological Science, University of Padua , Via F. Marzolo 5, 35131 Padua, Italy
| | - S Da Ros
- Department of Pharmaceutical and Pharmacological Science, University of Padua , Via F. Marzolo 5, 35131 Padua, Italy
| | - C Bazzicalupi
- Department of Chemistry "U. Schiff", University of Florence , Via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
| | - C Sissi
- Department of Pharmaceutical and Pharmacological Science, University of Padua , Via F. Marzolo 5, 35131 Padua, Italy
| | - P Gratteri
- Department Neurofarba-Pharmaceutical and Nutraceutical Section and Laboratory of Molecular Modeling Cheminformatics & QSAR, University of Florence , Via U. Schiff 6, 50019 Sesto Fiorentino, Florence, Italy
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Jana S, Jana J, Patra K, Mondal S, Bhat J, Sarkar A, Sengupta P, Biswas A, Mukherjee M, Tripathi SP, Gangwal R, Hazra J, Sangamwar AT, Mukherjee G, Bhattacharjee S, Mandal DP, Chatterjee S. LINCRNA00273 promotes cancer metastasis and its G-Quadruplex promoter can serve as a novel target to inhibit cancer invasiveness. Oncotarget 2017; 8:110234-110256. [PMID: 29299144 PMCID: PMC5746379 DOI: 10.18632/oncotarget.22622] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 09/13/2017] [Indexed: 01/16/2023] Open
Abstract
Discovery of anti-metastatic drugs is of immense clinical significance as metastasis is responsible for 90% of all cancer deaths. Here we report the inhibitory effect of a bis schiff base (M2) on cancer cell migration and invasion in vitro and in vivo. M2 has shown good solubility and permeability across the intestinal cell wall and hence can be classified as BCS (Biopharmaceutical classification system) class I. Microarray studies identified a long non coding intergenic RNA, LINC00273 as a novel molecular target of M2. We report that LINC00273 harbors a unique (4n-1) parallel G-Quadruplex structure in its promoter as validated by DMS footprint. M2 is proposed to stabilize this G-quadruplex structure resulting in the down-regulation of LINC00273 expression. Dual Luciferase reporter assay also suggests inhibition of LINC00273 promoter activity by M2. Involvement of this linc in metastasis is proven by siRNA and shRNA mediated knock down of LINC00273 in vitro and in vivo in nude mice which significantly decelerates cancer cell migration and invasion and also makes the cells unresponsive to TGF-β's pro-metastatic effects. Furthermore, the real time expression of LINC00273 in thirty seven human clinical samples is found to be positively correlated with the histopathological staging of metastasis.
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Affiliation(s)
- Samarjit Jana
- Department of Zoology, West Bengal State University, Malikapur, Kolkata 700126, India
| | - Jagannath Jana
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi, Kolkata 700054, India
| | - Kartick Patra
- Department of Zoology, West Bengal State University, Malikapur, Kolkata 700126, India
| | - Soma Mondal
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi, Kolkata 700054, India
| | - Jyotsna Bhat
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi, Kolkata 700054, India
| | - Arnab Sarkar
- Department of Zoology, West Bengal State University, Malikapur, Kolkata 700126, India
| | - Pallabi Sengupta
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi, Kolkata 700054, India
| | - Anindya Biswas
- Department of Biochemistry, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi, Kolkata 700054, India
| | - Meghomukta Mukherjee
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi, Kolkata 700054, India
| | - Satya Prakash Tripathi
- Department of Pharmacoinformatics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, S. A. S. Nagar, Punjab 160062, India
| | - Rahul Gangwal
- Department of Pharmacoinformatics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, S. A. S. Nagar, Punjab 160062, India
| | - Joyita Hazra
- Department of Molecular Medicine, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi Kolkata 700054, India
| | - Abhay T Sangamwar
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, S. A. S. Nagar, Punjab 160062, India
| | - Gopeswar Mukherjee
- Barasat Cancer Research and Welfare Centre, Barasat, Kolkata 700124, India
| | - Shamee Bhattacharjee
- Department of Zoology, West Bengal State University, Malikapur, Kolkata 700126, India
| | - Deba Prasad Mandal
- Department of Zoology, West Bengal State University, Malikapur, Kolkata 700126, India
| | - Subhrangsu Chatterjee
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VIIM, Kankurgachi, Kolkata 700054, India
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Bhat J, Mondal S, Sengupta P, Chatterjee S. In Silico Screening and Binding Characterization of Small Molecules toward a G-Quadruplex Structure Formed in the Promoter Region of c-MYC Oncogene. ACS OMEGA 2017; 2:4382-4397. [PMID: 30023722 PMCID: PMC6044917 DOI: 10.1021/acsomega.6b00531] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/20/2017] [Indexed: 06/08/2023]
Abstract
Overexpression of c-MYC oncogene is associated with cancer pathology. Expression of c-MYC is regulated by the G-quadruplex structure formed in the G-rich segment of nuclease hypersensitive element (NHE III1), that is, "Pu27", which is localized in the promoter region. Ligand-induced stabilization of the Pu27 structure has been identified as a novel target for cancer therapeutics. Here, we have explored the library of synthetic compounds against the predefined binding site of Pu27. Three compounds were selected based on the docking analyses; they were further scrutinized using all atom molecular dynamics simulations in an explicit water model. Simulated trajectories were scrutinized for conformational stability and ligand binding free energy estimation; essential dynamic behavior was determined using principal component analysis. One of the molecules, "TPP (1-(3-(4-(1,2,3-thiadiazol-4-yl)phenoxy)-2-hydroxypropyl)-4-carbamoylpiperidinium)", with the best results was considered for further evaluation. The theoretical observations are supported well by biophysical analysis using circular dichroism, isothermal titration calorimetry, and high-resolution NMR spectroscopy indicating association of TPP with Pu27. The in vitro studies were then translated into c-MYC overexpression in the T47D breast cancer cell line. Biological evaluation through the MTT assay, flow cytometric assay, RT-PCR, and reporter luciferase assay suggests that TPP downregulates the expression of c-MYC oncogene by arresting its promoter region. In silico and in vitro observations cumulatively suggest that the novel skeleton of TPP could be a potential anticancer agent by stabilizing the G-quadruplex formed in the Pu27 and consequently downregulating the expression of c-MYC oncogene. Derivation of new molecules on its skeleton may confer anticancer therapeutics for the next generation.
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10
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Banerjee A, Sanyal S, Dutta S, Chakraborty P, Das PP, Jana K, Vasudevan M, Das C, Dasgupta D. The plant alkaloid chelerythrine binds to chromatin, alters H3K9Ac and modulates global gene expression. J Biomol Struct Dyn 2016; 35:1491-1499. [PMID: 27494525 DOI: 10.1080/07391102.2016.1188154] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Chelerythrine (CHL), a plant alkaloid, possesses antimicrobial, anti-inflammatory, and antitumor properties. Although CHL influences several key signal transduction pathways, its ability to interact directly with nucleoprotein complex chromatin, in eukaryotic cells has so far not been looked into. Here we have demonstrated its association with hierarchically assembled chromatin components, viz. long chromatin, chromatosome, nucleosome, chromosomal DNA, and histone H3 and the consequent effect on chromatin structure. CHL was found to repress acetylation at H3K9. It is more target-specific in terms of gene expression alteration and less cytotoxic compared to its structural analog sanguinarine.
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Affiliation(s)
- Amrita Banerjee
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Sulagna Sanyal
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Shreyasi Dutta
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Payal Chakraborty
- b Genome Informatics Research Group , Bionivid Technology Pvt Ltd. , Bangalore 560043 , India
| | - Prajna Paramita Das
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Kuladip Jana
- c Division of Molecular Medicine, Centre for Translational Animal Research , Bose Institute , P 1/12, C. I. T. Road, Scheme - VIIM, Kolkata 700054 , India
| | - Madavan Vasudevan
- b Genome Informatics Research Group , Bionivid Technology Pvt Ltd. , Bangalore 560043 , India
| | - Chandrima Das
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
| | - Dipak Dasgupta
- a Biophysics and Structural Genomics Division , Saha Institute of Nuclear Physics , Block - AF Sector-I, Bidhan Nagar, Kolkata 700064 , India
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Malhotra R, Rarhi C, Diveshkumar K, Barik R, D’cunha R, Dhar P, Kundu M, Chattopadhyay S, Roy S, Basu S, Pradeepkumar P, Hajra S. Dihydrochelerythrine and its derivatives: Synthesis and their application as potential G-quadruplex DNA stabilizing agents. Bioorg Med Chem 2016; 24:2887-2896. [DOI: 10.1016/j.bmc.2016.04.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 04/25/2016] [Accepted: 04/28/2016] [Indexed: 12/11/2022]
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12
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Bhat J, Chatterjee S. Skeleton selectivity in complexation of chelerythrine and chelerythrine-like natural plant alkaloids with the G-quadruplex formed at the promoter of c-MYC oncogene: in silico exploration. RSC Adv 2016. [DOI: 10.1039/c6ra04671a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Chelerythrine binds at the 5′ end and arrests the G-quadruplex formed in the promoter region ofc-MYConcogene thus restrict thec-MYCexpression. Position of methoxy group over the core skeleton of chelerythrine determines the binding pattern of ligand.
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Affiliation(s)
- Jyotsna Bhat
- Department of Biophysics
- Bose Institute
- Kolkata
- India
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